• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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    • 专利摘要:
    METHOD AND DEVICE FOR FORMING GROOVES IN PIPING ELEMENTS. This is a method of forming circumferential grooves in piping elements using opposing cylinders to cold work the piping elements that determines the diameter of the groove as the piping element is rotated between the cylinders. A device to perform the method uses instant groove diameter determinations in a feedback loop to control device operation and stop groove formation when the groove diameter is within a specified tolerance.
    公开号:BR112016002972B1
    申请号:R112016002972-0
    申请日:2014-07-18
    公开日:2021-05-25
    发明作者:Matthew J. Puzio；Anthony Price；Daniel B. Vicario；Douglas R. Dole
    申请人:Victaulic Company；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION
    [001] The present invention relates to a method and a device for forming a circumferential groove in a pipe element. BACKGROUND
    [002] Piping elements, which include any piping-like item, such as piping stock, as well as fittings, including, for example, elbows, straight and "T" components such as valves, strainers, end caps, and inlets and pump outlets, can be sealably joined in end-to-end relationship using mechanical pipe couplings, an example of which is disclosed in US Patent No. 7,086,131. Couplings are formed from two or more segments joined end to end by threaded fasteners. In use, the coupling segments are positioned surrounding the piping elements and are drawn toward each other and into engagement with the piping elements by tightening the threaded fasteners. The piping elements may have circumferential grooves that are engaged through the radial projection of keys in the piping couplings to provide a positive restraint to thrust loads experienced by the piping elements when under internal fluid pressure from within. An elastomeric gasket, often in the form of a ring, is positioned between the coupling segments and the piping elements to ensure fluid tightness in the joint. The gasket may have packings that use gasket fluids. The gasket may have packing that uses internal hydrostatic pressure within the piping elements to increase the maximum pressure at which it remains effective to prevent leakage. The gasket is radially compacted between the coupling segments and the piping elements to affect the desired fluid-tight seal.
    [003] To form a fluid-tight joint using a mechanical coupling with grooved pipe elements it is necessary to control the dimensions of the circumferential grooves of the pipe elements so that the grooves properly engage the keys of the coupling elements and also allow the segments to move towards each other and compress the gasket sufficiently to affect the fluid-tight seal.
    [004] Grooves can be formed by cold working on the sidewall of the piping element between opposing cylinders that are forced towards each other to dispose material from the piping element, typically by hydraulic means, as they rotate around substantially parallel geometric axes of rotation. The piping element rotates in response (or the cylinders orbit around the piping circumference) and the groove is formed around the piping circumference element. Dimensional control of the grooves is hampered by the allowable tolerances of the pipe dimensions. For example, for steel pipe, the diameter tolerances can be as large as +/- 1%, the wall thickness tolerance is -12.5% with no fixed upper limit, and the outside roundness tolerance is +/- 1%. These relatively large dimensional tolerances present challenges when forming circumferential grooves through cold working. It would be advantageous to develop a method and apparatus that actively measures a parameter, such as groove diameter, and uses such measurements as the groove is formed to control groove movement that forms cylinders as they form the groove. This will avoid the prior art test groove and measurement/adjustment procedure. SUMMARY
    [005] The invention relates to a method for forming a circumferential groove in a pipe element that has a longitudinal geometric axis. The method is carried out using a drive cylinder and a furrowing cylinder. In an exemplary embodiment, the method comprises: engaging the piping element with the drive cylinder; engage the grooving cylinder with the piping element; forming the groove by rotating the piping element about the longitudinal axis while forcing the grooving cylinder against the piping element so as to displace material from the piping element; measure a groove circumference while rotating the piping element; determine a groove diameter using the groove circumference; compare the groove diameter with a desired tolerance range; and repeating the steps of form, measure, determine and compare until the groove diameter is within the desired tolerance range.
    [006] This example method may further comprise: determining a pipe element diameter; compare the pipe element diameter with a tolerance range for the pipe element diameter; reject the pipe element before forming the groove in the pipe element if the pipe element diameter is not within the tolerance range for the pipe element diameter.
    [007] In a specific example of the method, determining the diameter of the pipe element may comprise: rotating the pipe element while the pipe element is engaged with the furrow cylinder, with the furrow cylinder rotating in response to the furrow element pipe; knowing a diameter of a surface of the grooving cylinder engaged with the pipe element; determining a number of revolutions of the furrowing cylinder, including fractions thereof, for each revolution of the piping element; and calculating the diameter of the pipe element, the number of revolutions of the grooving cylinder, including fractions thereof, per revolution of the pipe element which is proportional to the diameter of the pipe element.
    [008] By way of example, determining the number of revolutions of the furrowing cylinder, including fractions thereof, may comprise counting the number of revolutions of the furrowing cylinder, including fractions thereof, by at least one of the revolutions of the piping element.
    [009] In an example of method modality, determining at least one revolution of the piping element is done by: marking an outer surface of the piping element with a light-reflecting surface that contrasts with the outer surface of the piping element ; emit a light on the outer surface of the piping element; detecting a first and a second reflection of light from the light-reflecting surface while rotating the piping element.
    [010] In a specific example of modality, engaging the grooving cylinder with the piping element comprises clamping the piping element between the grooving cylinder and the drive cylinder with sufficient force to hold the piping element between them. An exemplary embodiment of the method comprises engaging an inner surface of the piping element with the drive cylinder and engaging an outer surface of the piping element with the furrowing cylinder.
    [011] By way of example, the method may also comprise selecting a rotary speed to rotate the pipe element based on at least one characteristic of the pipe element. The at least one characteristic of the piping element can be selected from the group consisting of a diameter, a wall thickness, a material of the piping element and combinations thereof.
    [012] Similarly, by way of example, the method may further comprise selecting a force to force the grooving cylinder against the pipe element based on at least one characteristic of the pipe element. The at least one characteristic of the piping element can be selected from the group consisting of a diameter, a wall thickness, a material of the piping element and combinations thereof.
    [013] Again, by way of example, the method may comprise selecting a furrow cylinder feed rate to form the groove in the pipe element based on at least one characteristic of the pipe element. The at least one characteristic of the piping element can be selected from the group consisting of a diameter, a wall thickness, a material of the piping element and combinations thereof.
    [014] In an example embodiment of the method, determining the groove diameter comprises: knowing a diameter of a surface of the groove cylinder engaged with the groove inside the pipe element; determining a number of revolutions of the furrowing cylinder, including fractions thereof, for each revolution of the piping element; calculate the groove diameter, the number of groove cylinder revolutions, including their fractions, per pipe element revolution that is proportional to the groove diameter.
    [015] Additionally, by way of example, determining the number of revolutions of the furrowing cylinder, including the fractions thereof, comprises counting the number of revolutions of the furrowing cylinder, including the fractions thereof, by at least one of the pipe element revolutions.
    [016] In a modality example, determining the at least one revolution of the piping element can be performed by: marking an outer surface of the piping element with a light-reflecting surface that contrasts with the outer surface of the piping element; emit a light on the outer surface of the piping element; detecting a first and a second reflection of light from the light-reflecting surface while rotating the piping element.
    [017] Additionally, an example method may further comprise measuring a plurality of dimensions close to the circumferential groove in the pipe element while rotating the pipe element. In an example embodiment, measuring the plurality of dimensions comprises measuring at least one dimension selected from the group consisting of a distance from an end of the groove to an end of the pipe, a groove width, a groove depth, a height pipe expansion and combinations thereof.
    [018] The invention also encompasses a method for processing a pipe element that has a longitudinal axis with the use of a drive cylinder and an idle cylinder. In an exemplary embodiment, the method comprises determining a pipe element diameter by: engaging the pipe element with the drive cylinder; engage the idle cylinder with the piping element; rotating the pipe element around the longitudinal axis while the pipe element is engaged with the idle cylinder, with the idle cylinder rotating in response to the pipe element; knowing a diameter or circumference of a surface of the idle cylinder engaged with the pipe element; determine a number of idle cylinder revolutions, including fractions thereof, for each pipe element revolution; and use the number of idle cylinder revolutions, including fractions thereof, per pipe element revolution to calculate the pipe element diameter.
    [019] In this example, determining the number of revolutions of the idle cylinder, including fractions thereof, may comprise counting the number of revolutions of the idle cylinder, including fractions thereof, for at least one revolution of the piping element.
    [020] The example method may further comprise: comparing the diameter of the pipe element with a tolerance range for the diameter of the pipe element; reject the pipe element if the pipe element diameter is not within the tolerance range for the pipe element diameter.
    [021] By way of example, the at least one revolution of the piping element can be determined by: marking an outer surface of the piping element with a light-reflecting surface that contrasts with the outer surface of the piping element; emit a light on the outer surface of the piping element; detecting a first and a second reflection of light from the light-reflecting surface while rotating the piping element.
    [022] In another example embodiment, the at least one revolution of the pipe element can be determined by: placing a magnet on a surface of the pipe element; detecting a first and a second magnetic field while rotating the piping element.
    [023] In a specific embodiment example, the idle cylinder can be used as a grooving cylinder to form a circumferential groove in the piping element around the longitudinal axis by: forcing the grooving cylinder against the piping element so displacing material from the pipe element while rotating the pipe element; measure a groove circumference while rotating the piping element; determine a groove diameter using the groove circumference; compare the groove diameter with a tolerance range for the groove diameter; repeat the forcing, measuring, determining and comparing steps until the groove diameter is within the tolerance range.
    [024] By way of example, measuring the circumference of the groove while rotating the pipe element may comprise: knowing a diameter or a circumference of a surface of the groove cylinder engaged with the groove; determine a number of furrow cylinder revolutions, and fractions thereof, for each revolution of the pipe element, and calculate the groove circumference using the surface diameter or circumference and the number of furrow cylinder revolutions, and fractions the same, for each revolution of the pipe element.
    [025] In a specific example, determining the number of revolutions of the furrowing cylinder, and the fractions thereof, comprises counting the number of revolutions of the furrowing cylinder, and the fractions thereof, by at least one of the revolutions of the element of tubing.
    [026] A further example comprises determining at least one revolution of the pipe element by detecting a feature in the pipe element at a first and a second time while rotating the pipe element.
    [027] By way of further example, the at least one revolution of the piping element can be determined by: marking an outer surface of the piping element with a light-reflecting surface that contrasts with the outer surface of the piping element; emit a light on the outer surface of the piping element; detecting a first and a second reflection of light from the light-reflecting surface while rotating the piping element.
    [028] In another example, the at least one revolution of the pipe element can be determined by: placing a magnet on a surface of the pipe element; detecting a first and a second magnetic field while rotating the piping element.
    [029] In another embodiment example, a grooving cylinder can be used to form a circumferential groove in the pipe element around the longitudinal axis by: forcing the grooving cylinder against the pipe element to displace material from the element of piping while rotating the piping element; measure a groove circumference while rotating the piping element; determine a groove diameter using the groove circumference; compare the groove diameter with a tolerance range for the groove diameter; repeat the forcing, measuring, determining and comparing steps until the groove diameter is within the tolerance range.
    [030] In a specific embodiment, measuring the circumference of the groove while rotating the pipe element may comprise: engaging the idle cylinder with the pipe element within the groove; knowing a diameter or circumference of a surface of the idle cylinder engaged with the piping element within the groove; determine a number of idle cylinder revolutions, and fractions thereof, for each revolution of the pipe element, and calculate the groove circumference using the surface diameter or circumference and the amount of idle cylinder revolutions, and fractions thereof , for each revolution of the pipe element.
    [031] As an additional example, determining the number of revolutions of the idle cylinder, and the fractions thereof, may comprise counting the number of revolutions of the idle cylinder, and the fractions thereof, for at least one revolution of the piping element .
    [032] Another example modality may comprise determining at least one revolution of the pipe element by: marking an outer surface of the pipe element with a light-reflecting surface that contrasts with the outer surface of the pipe element; emit a light on the outer surface of the piping element; detecting a first and a second reflection of light from the light-reflecting surface while rotating the piping element.
    [033] By way of further example, the at least one revolution of the pipe element can be determined by: positioning a magnet on a surface of the pipe element; detecting a first and a second magnetic field while rotating the piping element.
    [034] The invention further encompasses a device for forming a circumferential groove in a pipe element that has a longitudinal geometric axis. In an example of embodiment, the device comprises a drive cylinder rotating around a drive cylinder geometric axis. The drive cylinder is engageable with an inner surface of the piping element when the drive cylinder axis is oriented substantially parallel to the longitudinal axis of the tubing element. A furrow cylinder is rotatable about a furrow cylinder axis oriented substantially parallel to the drive cylinder axis. The grooving cylinder has a known diameter. The furrowing cylinder is movable towards and in the opposite direction to the drive cylinder so as to forcefully engage the outer surface of the piping element and form the groove in it by rotating the piping element. A first sensor is used to determine a degree of rotation of the furrowing cylinder and generate a first signal indicative of it. A second sensor is used to determine a degree of rotation of the piping element and generate a second signal indicative of the same. A control system is adapted to receive the first and second signals, use the first and second signals to determine a groove diameter, and control movement of the furrow cylinder towards and away from the drive cylinder in response to the diameter. of the groove.
    [035] By way of example, the first sensor may comprise a rotary encoder operatively associated with the furrowing cylinder. Also by way of example, the second sensor may comprise a light-reflecting surface attached to an outer surface of the pipe element. The light-reflecting surface contrasts with the outer surface of the piping element. A light projector is positioned to project light onto the outer surface of the piping element and the light-reflecting surface attached to it. A detector, adapted to detect light projected by the light projector upon reflection from the light-reflecting surface, generates its indicative signal. By way of example, the light projector may comprise a laser. As a further example, the light reflecting surface can be selected from the group consisting of a specular reflecting surface, a diffuse reflecting surface, a contrasting color reflecting surface and combinations thereof. In another embodiment example, the second sensor comprises a magnet attached to a surface of the pipe element. A detector is adapted to detect a magnetic field. The detector generates a signal indicative of it. In another exemplary embodiment, the device may further comprise a third sensor for measuring a surface profile of at least a portion of the piping element and generating a signal indicative of the same. The third sensor may, for example, comprise a laser adapted to project a fan-shaped beam along at least the portion of the piping element. A detector receives a fan-shaped beam reflection from the portion of the piping element. A calculator unit converts the reflection into measurements that represent the surface profile using triangulation. The calculator unit then generates the signal indicative of the measurements and transmits the signal to the control system.
    [036] By way of example, the grooving cylinder can be mounted on an actuator controlled by the control system, and the actuator comprises a ram, for example.
    [037] The invention further encompasses a device for forming a circumferential groove in a pipe element that has a longitudinal geometric axis. In an example of embodiment, the device comprises a drive cylinder rotating around a drive cylinder geometric axis. The drive cylinder is engageable with an inner surface of the piping element when the drive cylinder axis is oriented substantially parallel to the longitudinal axis of the tubing element. A furrow cylinder is rotatable about a furrow cylinder axis oriented substantially parallel to the drive cylinder axis. The grooving cylinder is movable towards and in the opposite direction to the drive cylinder so as to forcefully engage an outer surface of the piping element in order to displace material from the piping element and form the groove in it by rotating the piping element. An idle cylinder is rotatable about an idle cylinder geometry axis oriented substantially parallel to the drive cylinder axis. The idle cylinder has a known diameter. The idle cylinder is movable towards and away from the drive cylinder so as to engage an outer surface of the piping element so as to rotate upon rotation of the piping element. A first sensor determines a degree of rotation of the idle cylinder and generates a first signal indicative of it. A second sensor determines a degree of rotation of the piping element and generates a second signal indicating this. A control system is adapted to receive the first and second signals and use the first and second signals to determine a groove diameter and control movement of the furrow cylinder towards and away from the drive cylinder in response to the diameter. of the groove.
    [038] In a specific example of modality, the first sensor comprises a rotary encoder operatively associated with the idle cylinder. By way of further example, the second sensor may comprise a light-reflecting surface attached to an outer surface of the pipe element. The light-reflecting surface contrasts with the outer surface of the piping element. A light projector is positioned to project light onto the outer surface of the piping element and the light-reflecting surface attached to it. A detector is adapted to detect light projected by the light projector upon reflection from the light-reflecting surface, and the detector generates a signal indicative of it. The light projector can, for example, comprise a laser.
    [039] In another example of modality, the second sensor can comprise a magnet fixed to a surface of the pipe element. A detector is adapted to detect a magnetic field. The detector generates a signal indicative of it. The example device may further comprise a third sensor for measuring a surface profile of at least a portion of the piping element and generating a signal indicative thereof. In a specific example of embodiment, the third sensor comprises a laser adapted to project a fan-shaped beam along at least the portion of the piping element. A detector is adapted to receive a fan-shaped beam reflection from the portion of the piping element. A calculator unit converts the reflection into measurements that represent the surface profile using triangulation. The sensor generates the signal indicating the measurements and transmits the signal to the control system.
    [040] In a specific example of modality, the grooving cylinder is mounted on an actuator that is controlled by the control system. Similarly, by way of example, the idle cylinder can be mounted on an actuator that is controlled by the control system.
    [041] In another example embodiment of a device for forming a circumferential groove in a pipe element that has a longitudinal axis, the device comprises a drive cylinder rotating around a drive cylinder geometric axis. The drive cylinder is engageable with an inner surface of the piping element when the drive cylinder axis is oriented substantially parallel to the longitudinal axis of the tubing element. A furrow cylinder, rotatable about a furrow cylinder axis and oriented substantially parallel to the drive cylinder axis, has a known diameter. The furrowing cylinder is movable towards and in the opposite direction to the drive cylinder so as to forcefully engage an outer surface of the piping element and form the groove therein by rotating the piping element. A sensor is used to measure a surface profile of at least a portion of the piping element and generate a signal indicative of the same. A control system, adapted to receive the signal, uses the signal to determine a groove diameter and control the movement of the grooving cylinder toward and away from the drive cylinder in response to the groove diameter.
    [042] In a specific example of modality, the sensor comprises a laser adapted to project a beam in a fan shape along at least the portion of the piping element. A detector receives a fan-shaped beam reflection from the portion of the piping element. A calculator unit converts the reflection into measurements that represent the surface profile using triangulation, generates the signal indicative of the measurements and transmits the signal to the control system. BRIEF DESCRIPTION OF THE DRAWINGS
    [043] Figures 1 and 1A are isometric views of examples of embodiments of devices to form circumferential grooves in pipe elements;
    [044] Figure 2 is an isometric view of a portion of the device shown in Figure 1;
    [045] Figures 3, 3A, 4 and 5 are cross-sectional views of a portion of the device shown in Figure 1;
    [046] Figure 6 is a flowchart illustrating an example of a method for forming a circumferential groove in a pipe element;
    [047] Figure 7 is a cross-sectional view of the portion of the device shown in Figure 1;
    [048] Figure 8 is a longitudinal sectional view of a pipe element that has a circumferential groove; and
    [049] Figures 9 to 17 are flowcharts illustrating examples of methods of forming grooves in the piping element shown in Figure 8. DETAILED DESCRIPTION
    [050] Figure 1 shows an example of a device 10 for forming a circumferential groove in a pipe element. The device 10 comprises a drive cylinder 12 rotatable about an axis 14. In this example, the drive cylinder 12 is rotated around the axis 14 by an electric motor 16 positioned within a housing 18 in which the cylinder drive is mounted. Drive cylinder 12 has an outer surface 20 that is engageable with an inner surface of a piping element as described below. An idle cylinder, which, in this example embodiment, is a grooving cylinder 22, is also mounted in the housing 18 to rotate around a shaft 24. The shafts 14 and 24 are substantially parallel to each other, which allows that they cooperate during the formation of a circumferential groove.
    [051] The grooving cylinder 22 is mounted to the housing 18 through a hook 26 that allows the grooving cylinder to be moved towards and in the opposite direction to the drive cylinder in the direction indicated by arrow 28 while maintaining the geometric axes 14 and 24 in substantially parallel relationship. The movement of the hook 26 and thus of the furrowing cylinder 22 is effected by an actuator 30. Hydraulic actuators are advantageous due to the fact that they provide a large range of high force adjustable in delicate increments with subjecting ability locally the piping material to progressively form the groove. Other types of actuators are, of course, feasible.
    [052] As shown in Figure 2, the device also includes a first sensor 32 to determine the degree of rotation of the furrow cylinder 22 around the geometric axis 24 during the formation of the circumferential groove in the piping element. In this exemplary embodiment, the first sensor 32 comprises a rotary encoder. Rotary encoders are advantageous due to the fact that they have excellent reliability, repeatability, accuracy and resolution, which typically allows a revolution to be divided into 600,060 distinct steps for great accuracy in measuring the rotation of the groove cylinder 22. Model LM101C005BB20F00 rotary encoder provided by RLS of Ljubjana, Slovenia, serves as a practical example suitable for device 10.
    [053] In general, at least one revolution of the pipe element can be determined by detecting a feature in the pipe element at a first and second time while rotating the pipe element. The feature, for example, could be a naturally occurring feature, such as a single scratch, tool scratch, joint, or other feature that is not put into the pipeline for any specific purpose.
    [054] However, it is advantageous to place a feature on the pipe element that will be readily detectable in order to ensure a reliable and accurate determination of a pipe element revolution. Two examples are described below, although it is understood that other detection methods are also feasible.
    [055] Referring again to Figure 1, the device 10 comprises a second sensor 34 to determine the degree of rotation of the piping element. Figure 3 shows an example of the second sensor 34 comprising a light projector 36, e.g. a laser, a detector 38, which detects light from the projector as it is reflected from the piping element 40, and a light-reflecting surface. 42 which is affixed to the outer surface 40b of the pipe element 40. The light-reflecting surface 42 may be specular, diffuse or have a different color from the outer surface 40b of the pipe element 40 and thereby provides a contrast to the surface piping element external. Sensor 34 is also known as a contrast sensor due to the fact that detector 38 detects the difference between projected light reflected from the outer surface of pipe 40b and the contrasting light reflecting surface 42. Contrast sensors such as 34 are produced by Leuze Electronics of New Hudson, Michigan, USA, with model number HRTL 3B/66-S8 which is practicable for device 10 disclosed herein. Each time the light reflecting surface 42 passes under the light of the projector 36, the detector detects the reflection therefrom and generates a signal that can be used to detect and count the revolutions of the pipe element.
    [056] In an alternative embodiment, shown in Figure 3A, the second sensor 34 may comprise a magnetic sensor 35. The magnetic sensor 35 is also a non-contact proximity sensor that uses inductive or capacitive principles to detect the passage of a magnet 37 affixed to a surface, for example, the outer surface 40b of the pipe element 40. Each time the magnet 37 passes through the magnetic sensor 35, it generates a signal that can be used to detect and count the revolutions of the pipe element.
    [057] As shown in Figure 1, device 10 may also have a third sensor 46 for measuring a surface profile of at least a portion of the piping element. As shown in Figure 7, the third sensor 46 is a triangulation sensor and comprises a laser 48 adapted to produce a fan-shaped beam 50 along a portion of the outer surface 40b of the piping element 40 where the profile 52 is to be measured. A detector 54 is adapted to receive the reflection of the fan-shaped beam from the outer surface portion of the piping element. The third sensor 46 also includes a calculator unit 55 that uses triangulation to convert the fan-shaped beam reflection into measurements that represent the outer surface profile.
    [058] Referring again to Figure 1, device 10 also includes a control system 56.
    [059] The control system 56 is in communication with sensors 32, 34 and 46 as well as with the electric motor 16 and the actuator 30. Communication can be through dedicated electrical lines 58. The control system receives signals generated by the sensors 32, 34 and 46 and send commands to actuator 30 and motor 16 to control operation of the various parts of device 10 to form the groove in the piping elements. The sensor 32 generates signals indicative of the turning of the furrowing cylinder 22; sensor 34 generates signals indicative of the rotation of piping element 40 (see also Figure 3); and sensor 46 generates signals indicative of the outer surface profile of piping element 40 (see also Figure 7). These signals are transmitted to the control system. Control system 56 may comprise a computer or programmable logic controller that has resident software that interprets the signals from sensors 32, 34 and 46 and then issues commands to actuator 30 and motor 16 to affect the various functions associated with forming the circumferential grooves in the piping elements. Jutos, control system 56, actuator 30, motor 16 and sensors 32, 34 and 46 operate in a feedback loop to automatically form the grooves in an operation described below.
    [060] Figure 1A shows a device 10a that has a second idle cylinder 23 that is separate from the idle cylinder 22. In this embodiment example, the idle cylinder 22 is a grooving cylinder mounted on the hook 26 as described above, and the second idle cylinder 23 is mounted on an actuator 25 which is mounted on device 10a. Actuator 25 is controlled by control system 56 and moves idle cylinder 23 toward and away from drive cylinder 12 to engage and disengage idle cylinder 23 with the piping element. Idle cylinder 23 is rotatable about a geometry axis 27 substantially parallel to axis 14 and will rotate around axis 27 when engaged with a piping element that is mounted and rotated by drive cylinder 12. In this mode, the idle cylinder 23 is used to determine the pipe element diameter and groove diameter, and idle (grooving) cylinder 22 is used to support the pipe element and form a circumferential groove. To that end, the first sensor 32 is operatively associated with the idle cylinder 23 and used to determine the degree of rotation of the idle cylinder 23 around the axis 27 during determination of the pipe element diameter and formation of the circumferential groove in the pipe element. tubing. In such an example of embodiment, the first sensor 32 can again comprise a rotary encoder as described above. The rotary encoder counts the number of revolutions and fractions thereof of the idle cylinder 23 and generates a signal indicative thereof which is transmitted to the control system 56 over a communication link such as physical lines 58. The control system 56 uses the information conveyed in the signals to determine the pipe element diameter and control machine operation during grooving, as described below. DEVICE OPERATION
    [061] An example method for forming a circumferential groove in a piping element using the device 10 is illustrated in Figures 1 to 5 and in the flowchart of Figure 6. As shown in Figure 3, the piping element 40 is engaged with drive cylinder 12 (see box 62 in Figure 6). In this example, the inner surface 40a of the piping element 40 is brought into contact with the drive cylinder. Then, as described in box 64 of Figure 6, the furrow cylinder 22 is moved by the actuator 30 (under the command of the control system 56) towards the drive cylinder 12 until it engages the outer surface 40b of the element. of piping 40. It is advantageous to clamp the piping element 40 between the drive cylinder 12 and the furrow cylinder 22 with sufficient force to securely hold the piping element in the device 10. At this point, it is possible to determine the diameter of the pipe element 40 so as to both accept the pipe element and form the circumferential groove, and reject the pipe element due to the fact that its diameter is outside the accepted tolerance range and thus would be incompatible with other piping elements of the same nominal size. The determination of the diameter of the pipe element is represented by box 66 in Figure 6 and is performed by measuring the circumference of the pipe while rotating the pipe element 40 around its longitudinal axis 68 using the drive cylinder 12 powered by motor 16. The drive cylinder 12, in turn, rotates the piping element 40, which causes the furrow cylinder 22 to rotate around its geometric axis 24. For greater measurement accuracy, it is advantageous if the furrow cylinder 22 rotates in response to the piping element 40 without slipping. The diameter of the pipe element 40 can then be calculated by knowing the diameter of the surface 22a of the furrow cylinder 22 that is in contact with the pipe element 40, and counting the number of revolutions of the furrow cylinder, including fractions of a revolution. , for each revolution of the pipe element. If the diameter D of the grooved cylinder surface 22a is known, then the circumference C of the pipe element 40 can be calculated from the ratio C = (D x rev xn) where "rev" is equal to the number of revolutions of the cylinder of grooving 22 (including fractions of a turn) for one revolution of the pipe element. Once the circumference C of the piping element is known, the diameter of the piping element d can be calculated from the ratio d=C/n. In device 10, sensor 32, for example a rotary encoder, counts the number of revolutions and fractions thereof (rev) of the furrowing cylinder 22 and generates a signal indicative of the same. Each revolution of the pipe element 40 is detected and/or counted by the sensor 34, which generates signals indicative of the same. For example, if sensor 34 is a contrast sensor as described above (see Figure 3), it detects first and second reflections from the light-reflecting surface 42, which indicate that it has detected or counted one revolution of the element. of piping. If the sensor 34 is a magnetic sensor (Figure 3A), it detects a first and a second magnetic field, which indicates that it has detected or counted a revolution of the piping element. The signals from the sensor 32 and sensor 34 are transmitted to the control system 56, which performs the calculations to determine the diameter of the piping element 40. The control system can then display the diameter of the piping element for an operator to accept or reject, or, the control system itself can compare the pipe element diameter to a tolerance range for pipes of a known nominal size and display an “accept” or “reject” signal to the operator. Note that for such automated operation, the control system is programmed with dimensional tolerance data for piping elements of various standard sizes. The operator must assemble the appropriate grooving cylinder into the standard piping size and groove that is formed and enter the specific standard piping elements that are processed into the control system. In response to these inputs the software residing within the control system will then use the appropriate reference data to determine if the piping element has a diameter that is within the acceptable tolerance range for piping elements of the selected standard size.
    [062] The box 70 of Figure 6 and Figure 4 illustrate the formation of a groove 72 in the piping element 40. The drive cylinder 12 is rotated, which thereby rotates the piping element 40 around the shaft longitudinal axis of the same 68, which rotates the furrow cylinder 22 around the geometric axis 24. Note that the rotation axis 14 of the drive cylinder 12, the rotation axis 24 of the furrow cylinder 22 and the longitudinal axis 68 of the pipe element 40 are substantially parallel to each other. "Substantially parallel", as used herein, means within about 2 degrees to allow for rotation without significant friction but also to allow tracking of forces to be generated that keep the piping element engaged with the drive and grooving cylinders during the whirl. During the rotation of the piping element, the actuator 30 (Figure 1) forces the grooving cylinder 22 against the piping element 40, which thereby cold works the piping element, arranges the piping material element and forms the circumferential groove 72. Note the force exerted by the actuator 30, as well as the feed rate of the furrow cylinder 22 (ie, the rate at which the furrow cylinder moves towards the drive cylinder) and the rotary speed of the pipe element can be selected based on one or more characteristics of the pipe element 40. Such characteristics include, for example, the diameter of the pipe element, the wall thickness (programming), and the material comprising the pipe element. tubing. Selection of operating parameters such as force, feed rate and rotational speed can be set by the operator, or, by the control system 56 in response to operator inputs that specify that the specific pipeline is processed. For example, the control system may have a database of preferred operating parameters associated with specific standard piping elements based on diameter, schedule, and material.
    [063] For compatibility of piping element 40 with mechanical couplings, it is necessary that the final diameter 74b (see Figure 5) of groove 72 is within an acceptable tolerance for the specific diameter piping element being processed. As indicated in box 76 (see also Figure 4), to produce an acceptable groove 72, the instantaneous groove diameter 74a (ie, the groove diameter before it reaches the final diameter) is determined at intervals as the element of pipe 40 rotates. The instantaneous groove diameter 74a, as shown in Figure 4, is determined using signals from sensor 32 and sensor 34 as described above to determine the diameter of piping element 40 (Figure 6, box 66). The signals from sensor 32, indicative of the number of revolutions (and fractions thereof) of the furrowing cylinder 22, and signals from sensor 34, indicative of the number of revolutions of the pipe element, constitute a measure of the instantaneous circumference of the pipe element 40 within the groove 72. These signals are transmitted to the control system 56 which uses the information in the signals to determine (i.e. calculate) the instantaneous diameter 74a of the groove 72 (note that the diameter of the surface 22a of the groove cylinder 22 that form the groove is known). As shown in box 78, the control system then compares the instantaneous groove diameter with the appropriate tolerance range for groove diameters for the specific pipe being processed. As shown in box 80, if the instantaneous groove diameter is not within the appropriate tolerance range, for example, the instantaneous groove diameter is greater than the largest acceptable diameter for the specific piping element being processed, then the control 56 continues to form groove 72 by rotating the pipe element 40 around the longitudinal axis thereof 68 while forcing the groove cylinder 22 against the pipe element so as to displace material from the pipe element, determining the instantaneous groove diameter 74a of groove 72 while rotating piping element 40 and compare the instantaneous groove diameter with the tolerance range for the groove diameter until the groove diameter is within the acceptable tolerance range for the groove diameter.
    [064] Once the final groove diameter 74b is at a predetermined target diameter, the control system 56 stops the movement of the furrow cylinder 22 towards the drive cylinder 12, but continues the rotation of the piping element by, at least one full turn to ensure even grooving depth. Rotation is then stopped and the furrowing cylinder 22 is moved away from the drive cylinder 12 so that the piping element 40 can be removed from the device 10.
    [065] Another example method for forming a circumferential groove in a pipe element is described using the device 10a shown in Figure 1A. This mode has two separate idle cylinders, idle cylinder 22 which is a grooving cylinder and idle cylinder 23 which is a measuring cylinder. As described above, the piping element is engaged with drive cylinder 12 (see box 62 in Figure 6). Then, as described in box 64 of Figure 6, the furrow cylinder 22 is moved by the actuator 30 (under the command of the control system 56) towards the drive cylinder 12 until it engages the outer surface of the driving element. tubing. It is advantageous to clamp the piping element between the drive cylinder 12 and the furrow cylinder 22 with sufficient force to securely hold the piping element in the device 10.
    [066] Control system 56 also commands actuator 25 to move idle cylinder 23 into engagement with the outer surface of the piping element. At this point, it is possible to determine the diameter of the pipe element in order to either accept the pipe element and form the circumferential groove, or reject the pipe element due to the fact that its diameter is outside the accepted tolerance range and , thus, would be incompatible with other piping elements of the same nominal size. The determination of the diameter of the pipe element is represented by box 66 in Figure 6 and is performed by measuring the circumference of the pipe element while rotating it around its longitudinal axis using the drive cylinder 12 fed by the motor 16. The drive cylinder 12, in turn, rotates the piping element, which causes the idle cylinder 23 to rotate around its geometric axis 27. For greater measurement accuracy, it is advantageous if the idle cylinder 23 rotate in response to the piping element without slipping. The diameter of the pipe element can then be calculated by knowing the diameter of the surface of the idle cylinder 23 that is in contact with the pipe element, and counting the number of revolutions of the idle cylinder 23, including fractions of a revolution, for each revolution. of the piping element. If the diameter D of idle cylinder 23 is known, then the circumference C of the pipe element can be calculated from the ratio C = (D x rev xn) where “rev” is equal to the number of revolutions of idle cylinder 23 (including fractions of a revolution) for one revolution of the pipe element. Once the circumference C of the piping element is known, the diameter of the piping element d can be calculated from the ratio d=C/n.
    [067] In the device 10a, the sensor 32, for example, a rotary encoder, counts the amount of revolutions and fractions thereof of the idle cylinder 23 and generates a signal indicative of the same. Each revolution of the pipe element is detected and/or counted by sensor 34 (eg a contrast sensor or a magnetic sensor), which generates signals indicative of the same. Signals from sensor 32 and sensor 34 are transmitted to control system 56, which performs calculations to determine the diameter of the piping element. The control system can then display the pipe element diameter for an operator to accept or reject, or the control system itself can compare the pipe element diameter to a tolerance range for pipes of a known nominal size and display an “accept” or “reject” signal to the operator.
    [068] Box 70 of Figure 6 illustrates the formation of a groove in the pipe element. The drive cylinder 12 is rotated, which thereby rotates the piping element around its longitudinal axis, which rotates the furrow cylinder 22 around its axis 24 and the idle cylinder 23 around of the geometric axis of the same 27. Note that the rotation axis 14 of the drive cylinder 12, the rotation axis 24 of the furrowing cylinder 22, the rotation axis 27 of the idle cylinder 23 and the longitudinal axis of the element pipes are substantially parallel to each other. During rotation of the piping element, the actuator 30 forces the grooving cylinder 22 against the piping element, which thereby cold works the piping element, arranges the piping material element and forms the circumferential groove. Also during rotation of the piping element, the actuator 25 keeps the idle cylinder 23 in contact with the piping element within the groove that is formed by the grooving cylinder 22.
    [069] For piping element compatibility with mechanical couplings, it is necessary that the final groove diameter is within an acceptable tolerance for the specific diameter piping element being processed. As indicated in box 76, to produce an acceptable groove, the instantaneous groove diameter (i.e., the groove diameter before it reaches the final diameter) is determined at intervals as the piping element rotates. Instantaneous groove diameter is determined using signals from sensor 32 and sensor 34 as described above to determine piping element diameter (Figure 6, box 66). The signals from the sensor 32, indicative of the number of revolutions (and fractions thereof) of the idle cylinder 23, and signals from the sensor 34, indicative of the number of revolutions of the piping element, constitute a measure of the instantaneous circumference of the piping element within the groove that is formed by the groove cylinder 22. These signals are transmitted to the control system 56 which uses the information in the signals to determine (ie calculate) the instantaneous groove diameter (note that the diameter of idle cylinder 23 in contact with the pipe element is known). As shown in box 78, the control system then compares the instantaneous groove diameter with the appropriate tolerance range for groove diameters for the specific pipe being processed. as shown in box 80, if the instantaneous groove diameter is not within the appropriate tolerance range, for example, the instantaneous groove diameter is greater than the largest acceptable diameter for the specific piping element being processed, then the control 56 continues to form the groove by rotating the pipe element around the longitudinal axis thereof while forcing the groove cylinder 22 against the pipe element so as to displace material from the pipe element, determining the instantaneous diameter of the groove (via idle cylinder 23 and associated sensor 32 thereof) while rotating the piping element, and compare the instantaneous groove diameter with the tolerance range for groove diameter until the groove diameter is within the range of acceptable tolerance for groove diameter.
    [070] Once the final groove diameter is at a predetermined target diameter, the control system 56 stops the movement of the furrow cylinder 22 towards the drive cylinder 12, but continues the rotation of the piping element by, by the less, one full turn to ensure an even grooving depth. The rotation is then stopped and the grooving cylinder 22 and idle cylinder 23 are moved away from the drive cylinder 12 so that the piping element can be removed from the device 10a.
    [071] As shown in Figure 7, triangulation sensor 46 can also be used to measure a plurality of dimensions of pipe element 40 near groove 72. As shown in Figure 8, dimensions such as distance 88 from pipe end 40 for the groove 72, the groove width 90, the groove depth 92, and the pipe element expansion height 94 can be measured to create a pipe end profile. Expansion can occur as a result of the grooving process and the height of expansion is the height of the end of the piping element above the piping diameter. This information can be transmitted to the control system for comparison with acceptable tolerances for these dimensions for a standard piping element.
    [072] As depicted in Figures 7 and 9, measuring the plurality of dimensions is performed while rotating the piping element and comprises projecting a fan-shaped light beam 50 along a length of the surface of the piping element 40 that includes circumferential groove 72 (see Figure 9, box 96). The reflection of the beam 50 is detected by a sensor 54 (box 98). A calculator unit 55 operatively associated with sensor 54 uses triangulation methods to calculate the dimensions of the region of pipe element 40 swept by beam 50 (box 100). The dimensional information is encoded in signals that are transmitted to the control system 56 (see Figure 1), in this example over physical lines 58. The dimensional information acquired in this way can be displayed and/or evaluated against a database to characterize the pipe element as processed.
    [073] Another example method for forming a circumferential groove in a pipe element that has a longitudinal geometric axis and uses a drive cylinder and a grooving cylinder is shown in Figure 10. This example method comprises: engaging the pipe element. piping with drive cylinder (box 102); engaging the grooving cylinder with the piping element (box 104); forming the groove by rotating the pipe element about the longitudinal axis thereof while forcing the grooving cylinder against the pipe element so as to displace material from the pipe element (box 106); measuring a plurality of groove circumferences while rotating the piping element (box 108); determining a plurality of groove diameters using the plurality of groove circumferences (box 110); calculate a change in groove diameter per pipe element revolution (box 112); calculate a number of pipe element revolutions required to form a groove of a desired diameter using the change in diameter per groove revolution (box 114); count the number of revolutions of the pipe element (box 116); and stop forcing the furrow cylinder against the piping element by reaching the number of revolutions necessary to form the groove of the desired diameter (box 118).
    [074] The method shown in Figure 10 is a predictive method that uses the rate of change of diameter per revolution of the pipe element to predict when to stop groove formation by disposing the pipe element material. As it is possible that the prediction may not yield as accurately a groove diameter as desired, the additional steps, shown below, may be advantageous: measuring the groove diameter (box 120); compare the groove diameter with the desired diameter (box 122); repeat the steps of forming, measuring, determining, calculating, counting, and interrupting (box 124).
    [075] Figure 11 shows a similar predictor-corrector method for forming the groove.
    [076] However, this method is based on the circumference of the groove, not the diameter. In a specific example, the method comprises: engaging the piping element with the drive cylinder (box 126); engage the grooving cylinder with the piping element (box 128); forming the groove by rotating the pipe element about the longitudinal axis while forcing the grooving cylinder against the pipe element so as to displace material from the pipe element (box 130); measuring a plurality of groove circumferences while rotating the piping element (box 132); calculate a change in groove circumference per pipe element revolution (box 134); calculate a number of pipe element revolutions needed to form a groove of a desired circumference using the change in circumference per pipe element revolution (box 136); count the number of revolutions of the pipe element (box 138); and stop forcing the furrow cylinder against the piping element by reaching the number of revolutions necessary to form the groove of the desired circumference (box 140).
    [077] Again, in order to account for inaccurate groove formation using prediction, the following steps can be added: measure the groove circumference (box 142); compare the groove circumference with the desired circumference (box 144); repeat the steps of forming, measuring, calculating, counting, and interrupting (box 146). the methods described so far use a substantially continuous feed from the grooving cylinder towards the piping element. However, there may be advantages in efficiency and accuracy if the grooving cylinder is advanced in different increments as described in the method shown in Figure 12 and described below: engaging the piping element with the drive cylinder (box 148); engaging the grooving cylinder with the piping element (box 149); form the groove by rotating the piping element around the longitudinal axis while forcing the grooving cylinder a distinct distance into the piping element so as to displace material from the piping element for one revolution of the piping element (box 150); measuring a circumference of the groove while rotating the piping element (box 152); determining a diameter of said groove using said circumference of said groove (box 154); compare the groove diameter with a tolerance range for the groove diameter (box 156); and until the groove diameter is within the tolerance range: repeat said steps of forming, determining and comparing (box 158).
    [078] It may still be advantageous to vary the size of the distinct distance by which the furrowing cylinder moves, for example, by decreasing the distinct distance for each of the revolutions as the diameter approaches the tolerance range. This can allow for more precision in furrow formation and decrease the time required to form a furrow.
    [079] The example method described in Figure 13 also uses different increments of the distance traveled by the grooving cylinder, but is based on the control of the grooving cylinder on measures of the groove circumference, as described below: engaging the pipe element with the drive cylinder (box 160); engaging the grooving cylinder with the piping element (box 162); form the groove by rotating the piping element around the longitudinal axis while forcing the grooving cylinder a distinct distance into the piping element so as to displace material from the piping element for one revolution of the piping element (box 164); measuring a circumference of the groove while rotating the piping element (box 166); comparing the groove circumference with a tolerance range for the groove circumference (box 168); and until the groove circumference is within the tolerance range: repeat said steps of forming, measuring and comparing (box 170).
    [080] Again, it may still be advantageous to vary the size of the distinct distance by which the furrowing cylinder moves, for example, by decreasing the distinct distance for each of the revolutions as the diameter approaches the tolerance range. This can allow for more precision in furrow formation and decrease the time required to form a furrow.
    [081] In the example method shown in Figure 14, the predictor-correction aspects are combined with the distinct stepwise movement of the furrowing cylinder, as described below: engaging the piping element with the drive cylinder (box 172 ); engaging the grooving cylinder with the piping element (box 174); form the groove by rotating the piping element around the longitudinal axis while forcing the grooving cylinder a distinct distance into the piping element so as to displace material from the piping element for one revolution of the piping element (box 176); calculate a number of pipe element revolutions required to form a groove of a desired diameter using the distinct distance per groove revolution (box 178); count the number of revolutions of the pipe element (box 180); and stop forcing the groove cylinder into the piping element by the distinct distance by reaching the number of revolutions necessary to form the groove of the desired diameter (box 182).
    [082] Again, it may be advantageous to add the following steps to the method shown in Figure 14: measure the groove diameter (box 184); compare the groove diameter with the desired diameter (box 186); repeat the steps of forming, measuring, calculating, counting, and interrupting (box 188).
    [083] In the example method modality of Figure 15, the groove depth 92 (see also Figure 8) is used to control the movement of the grooving cylinder as described below: engaging the piping element with the drive cylinder ( box 190); engage the grooving cylinder with the piping element (box 192); measuring a diameter of the pipe element while rotating the pipe element around the longitudinal axis (box 194); calculate a desired groove depth tolerance that corresponds to a desired groove diameter tolerance (box 196); forming the groove by rotating the piping element around the longitudinal axis while forcing the grooving cylinder against the piping element so as to displace material from the piping element (box 198); while rotating the piping element, measure the groove depth (box 200); compare the furrow depth to the desired furrow depth tolerance (box 202); and repeating said steps of forming the furrow, measuring the furrow depth and comparing the furrow depth with the desired furrow depth tolerance until the furrow depth is within the desired furrow depth tolerance (box 204).
    [084] Figure 16 shows an example of a method where the groove diameter is used to control the movement of the grooving cylinder, as described below: engaging the piping element with the drive cylinder (box 205); engaging the grooving cylinder with the piping element (box 206); determining a pipe element diameter while rotating the pipe element around the longitudinal axis (box 208); determine a desired groove diameter tolerance based on the pipe element diameter (box 210); forming the groove by rotating the pipe element about the longitudinal axis while forcing the grooving cylinder against the pipe element so as to displace material from the pipe element (box 212); determine the groove diameter while rotating the piping element (box 214); compare the groove diameter with the desired groove diameter tolerance (box 216); repeat the steps of forming the groove and determining the groove diameter until the groove diameter is within the desired groove diameter tolerance (box 218).
    [085] Figure 17 illustrates an example of a method in which the groove circumference is used to control the movement of the furrow cylinder, as described below: engaging the piping element with the drive cylinder (box 220); engage the grooving cylinder with the piping element (box 224); measuring a circumference of the piping element while rotating the piping element around the longitudinal axis (box 226); determining a desired groove circumference tolerance based on the pipe element diameter (box 228); forming the groove by rotating the piping element around the longitudinal axis while forcing the grooving cylinder against the piping element so as to displace material from the piping element (box 230); measure the groove circumference while rotating the piping element (box 232); compare the groove circumference to the desired groove circumference tolerance (box 234); repeat the steps of forming the groove, measuring the groove circumference, and comparing the groove circumference until the groove circumference is within the desired groove circumference tolerance (box 236).
    [086] The methods and apparatus disclosed in this document provide a high efficiency in the formation of grooved piping elements that reduce the probability of human error as well as the frequency of malformed grooves.
    权利要求:
    Claims (10)
    [0001]
    1. Method for processing a pipe element (40) having a longitudinal axis (68) with the use of a drive cylinder (12) and an idle cylinder (22) as a grooving cylinder to form a circumferential groove (72) in said pipe element around said longitudinal axis (68), said idle cylinder having a known diameter or circumference, said method comprising: engaging said pipe element (40) with said drive cylinder (12); engaging said idle cylinder with said piping element (40); rotating said pipe element (40) around said longitudinal axis (68) while said pipe element (40) is engaged with said idle cylinder, said idle cylinder rotating in response to the pipe element ( 40), the method characterized in that it further comprises: forcing said idle cylinder against said pipe element so as to displace material from the pipe element while rotating said pipe element and thus forming said groove; determining a number of revolutions of said idle cylinder, including fractions thereof, for each revolution of said pipe element (40); use said number of revolutions of said idle cylinder, including said fractions thereof, per revolution of said pipe element (40) to calculate said diameter of said pipe element (40) by: measuring a circumference of said groove while rotates said pipe element; determining a diameter of said groove using said circumference of said groove; comparing said diameter of said groove to a tolerance band for said diameter of said groove; repeating said forcing, measuring, determining and comparing steps until said diameter of said groove is within said tolerance range.
    [0002]
    2. Method according to claim 1, characterized in that it determines said number of revolutions of said idle cylinder (22) including said fractions thereof, comprises counting said number of revolutions of said idle cylinder, including said fractions thereof by at least one said revolution of said pipe element (40).
    [0003]
    3. The method of claim 1, further comprising: before forcing said idle cylinder (22) against said pipe element (40), comparing said diameter of said pipe element with a tolerance range for said diameter of said pipe element; rejecting said pipe element (40) if said diameter of said pipe element (40) is not within said tolerance range for said diameter of said pipe element (40).
    [0004]
    4. Method according to claim 1, characterized in that it further comprises determining at least one revolution of said pipe element (40) by detecting a feature (42) in said pipe element in a first and a second moments while rotating said pipe element (40).
    [0005]
    5. The method of claim 1, further comprising determining at least one revolution of said pipe element (40) by: marking an outer surface (40b) of said pipe element (40) with a light-reflecting surface (42) contrasting with said outer surface (40b) of said pipe element (40); emitting a light (36) on said outer surface (40b) of said pipe element (40); detecting a first and a second reflection of said light from said light reflecting surface (42) while rotating said pipe element (40).
    [0006]
    6. The method of claim 1, further comprising determining said at least one revolution of said pipe element (40) by: positioning a magnet (37) on a surface (40b) of said element of piping (40); detecting a first and a second magnetic field while rotating said pipe element (40).
    [0007]
    7. Method according to claim 1, characterized in that it measures said circumference of said groove (72) while rotating said pipe element (40) comprising: engaging said idle cylinder (22) with said element piping (40) within said groove; knowing a diameter or circumference of a surface (22a) of said idler cylinder (22) engaged with said pipe element within said groove; determine a number of revolutions of said idle cylinder (22), and fractions thereof, for each revolution of said pipe element (40), and calculate said circumference of said groove using said diameter or circumference of said surface and said number of revolutions of said idle cylinder (22), and fractions thereof, for each revolution of said pipe element (40).
    [0008]
    8. Method according to claim 7, characterized in that it determines said number of revolutions of said idle cylinder (22), and said fractions thereof, comprises counting said number of revolutions of said idle cylinder (22 ), and said fractions thereof, by at least one said revolution of said pipe element (40).
    [0009]
    9. Method according to claim 7, characterized in that it further comprises determining said at least one revolution of said pipe element (40) by: marking an outer surface (40b) of said pipe element (40) with a light-reflecting surface (42) that contrasts with said outer surface (40b) of said pipe element (40); emitting a light (36) on said outer surface (40b) of said pipe element (40); detecting a first and a second reflection of said light from said light reflecting surface (42) while rotating said pipe element (40).
    [0010]
    10. Method according to claim 7, characterized in that it further comprises determining said at least one revolution of said pipe element (40) by: positioning a magnet (37) on a surface (40b) of said element of piping (40); detecting a first and a second magnetic field while rotating said pipe element (40).
    类似技术:
    公开号 | 公开日 | 专利标题
    BR112016002972B1|2021-05-25|method for processing a pipe element
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    法律状态:
    2018-11-06| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|
    2020-05-12| B06U| Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]|
    2021-05-11| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2021-05-25| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 18/07/2014, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US13/964,671|US9333548B2|2013-08-12|2013-08-12|Method and device for forming grooves in pipe elements|
    US13/964,671|2013-08-12|
    PCT/US2014/047159|WO2015023391A1|2013-08-12|2014-07-18|Method and device for forming grooves in pipe elements|
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