• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A welding apparatus and method for automatically welding a pipe (3), the welding apparatus (1) comprising a support module (2), a welding unit (4), and a control unit (5); wherein the support module (2) comprises a motor-driven support (6) for supporting the pipe (3) and for motor-driven rotation of the pipe (3) about its longitudinal axis (26) by means of a motor (7); wherein the welding unit (4) comprises a welding head (12) for providing a welding seam for welding the pipe (3) at its end; wherein the control unit (5) is operatively connected to the welding unit (4) and the motor support (6) to control the welding automatically.
    公开号:DK202000177A1
    申请号:DKP202000177
    申请日:2020-02-13
    公开日:2021-05-27
    发明作者:Juel Olsen Christian
    申请人:Weldingdroid Aps；
    IPC主号:
    专利说明:

    FIELD OF THE INVENTION The present invention relates to the automatic welding of a pipe with another pipe or with an adjacent end flange by means of a weld seam.
    Description of the prior art When welding pipes together, it is well known to use automatic machines in which a pipe is rotated while a welding head is adjusted to make a welding seam during rotation of the pipe.
    Korean patents KR101245767, KR101395155 and KR20180080529A describe pipe welding machines in which the pipes rotate on rollers and are welded and in which the welding head is movable. A camera monitors the weld seam.
    For assembling pipes, however, a method is often used in which pipes are provided with a flange, which is then used together with a sealing O-ring to assemble the pipes in extension of each other by connecting two flanges. In many cases, the flanges on the pipes are welded at the installation site, and after installation, there is no need for the welding apparatus on site. For such situations, there is a need for a simple but reliable device that can be easily transported in a van in order to be able to change location quickly and easily between the welding tasks.
    Description of the invention It is thus an object of the invention to remedy shortcomings in the prior art and to provide an improvement in the technical field. It is also an object to provide a reliable welding apparatus for welding pipes with flanges and which can be easily arranged to weld pipes. Another object is to provide a simple but reliable apparatus which can be easily transported in a van to thereby be mobile for quick switching between locations where pipes are to be welded. The following describes methods and welding apparatus for welding a pipe together with another pipe or with an end flange by means of a welding seam and which fulfills one or more of these purposes.
    DK 2020 00177 A1 2 The welding machine comprises a support module, a welding unit and a control unit. The support module comprises a motor-driven support for supporting the pipe and for motor-driven rotation of the pipe about its longitudinal axis by means of a motor. For example, the support module comprises a support arm to which the welding unit is attached. Typically, the tube is supported with its axis of rotation oriented horizontally. The welding unit comprises a welding head for providing a welding seam for welding the pipe at its end. The control unit is functionally connected to the welding unit and the motor support to control the welding automatically. For welding, the welding head is placed at the desired position of the weld seam, and the pipe is automatically rotated about its longitudinal axis with the motor holder at a rotational speed of the pipe. The welding of the weld seam is then done automatically by means of the control unit's control of the welding unit and the motor with which the pipe is rotated during welding. Advantageously, the control unit also includes a power supply to the welding unit and a power supply to the motor. In an installer-friendly embodiment, the welding unit is connected to the control unit only with cables and hoses but is not mechanically fixed to the control unit. This facilitates assembly and disassembly as well as loading and unloading in connection with the transport of the support module, the welding unit and the control unit in a van.
    In some embodiments, the welding unit includes a movable welding arm that holds the welding head itself, the welding arm being movable to move the welding head in a direction parallel to a longitudinal and rotational axis of the pipe. This allows the welding head to be adjusted correctly to the position of the desired welding seam.
    In some embodiments, the position of the welding head in a direction parallel to the axis of rotation of the pipe is automatically adjusted by the control unit during welding. For example, when welding at the end of the pipe, the control unit may be programmed to oscillate the welding head automatically and periodically from one side of the end of the pipe to the counter.
    DK 2020 00177 A1 3 set side and over on the adjacent pipe or the adjacent end flange to heat the metal along an alternating path to form the weld seam along the end of the pipe. Thereby a wider weld seam is obtained and any dimensional variations at the end of the pipe are smoothed out. This results in a more robust welding method that is less susceptible to inaccuracies. As an example, oscillation can be from 1 mm to 10 mm from side to side. This oscillation can be performed while the tube is rotated about its longitudinal axis at a constant or varied speed. For example, the tube is rotated at a constant or varied speed while the welding head is moved from an outer position to an opposite outer position over a distance in the range of 1-10 mm. A typical time period for the movement between extreme positions is in the range of 0.5 to 2 seconds, such as 1 second. Optionally, the welding head is held in the outer position for a period of 0.1 to 0.5 seconds, such as 0.2 seconds, after which it is moved back again, thereby performing a oscillating movement.
    In some embodiments, the welding unit comprises a welding carriage on which is mounted the movable welding arm holding the welding head itself. The welding arm is then automatically movable relative to the welding carriage for adjusting the distance of the welding head from the welding carriage, thereby moving the welding head relative to the welding carriage in a direction parallel to a longitudinal and rotational axis of the pipe. The welding carriage is mounted movably in a direction perpendicular to the longitudinal axis of the pipe and comprises wheels which roll on the surface of the pipe during rotation of the pipe so that the welding carriage follows the surface of the pipe. When the welding is performed automatically by rotating the pipe in a direction of rotation, the welding carriage rolls on the surface of the pipe parallel to the direction of rotation of the surface of the pipe, i.e. tangential to the pipe in a plane perpendicular to the longitudinal axis of the pipe. As the welding carriage holds the welding unit, this means that the correct distance of the welding head in relation to the pipe is maintained, even with oval pipes. For example, in the case of oval tubes, the rotation of the tube will cause the welding carriage to move in a direction perpendicular to the axis of rotation of the tube and twice back and forth in the direction of and from the tube per lap of the rotation of the tube to remain on the surface of the tube. When an end flange is to be welded to a pipe, it is fixed on the pipe, for example by spot welding, before the combination of pipe and end flange is placed on the support modules for the actual welding, where a weld seam is then formed. It has shown
    DK 2020 00177 A1 4 states that for such welds of end flanges on pipes, improvements can be provided by very simple means as explained below. In a further development, an end plate is temporarily attached to an abutment surface of the end flange before forming the weld seam with the welding head. The end plate is dimensioned large enough for it to cover the end flange and thereby close off the end of the pipe. If shielding gas is filled for welding into the pipe, leakage of the shielding gas through the end flange is prevented by means of this end plate. After welding, the end plate is removed again.
    Such an end plate can for instance be fastened with a plurality of fastening units, for instance screw clamps or other clamping means, such as bolts. For example, the end plate is thus clamped against the abutment surface by the end flange. In concrete embodiments, the fastening units grip the side of the end flange which is opposite the abutment surface of the end flange to the end plate.
    Since this end plate is attached to the end flange, a holding of the end plate in the axial direction of the tube also causes a holding of both end flange and pipe in the axial direction.
    At the same time, in order to ensure that the pipe, the end flange and the end plate for the welding can rotate around the longitudinal axis of the pipe, for example a guide with guide rollers or guide sliders is provided which abuts both sides of the end plate, so that the guide is fixed in the axial direction, for example by attachment to the support module, but which allows rotation of the surface of the end plate through the guide. In order to achieve a stable axial holding, it is an advantage if the handlebar is placed close to the support modules, for example at the lower part of the end plate, when this is mounted in vertical orientation.
    In some embodiments, the welding unit has a spacer arm comprising a slider or roller, typically several sliders or rollers, adapted to slide or roll longitudinally along a reference surface perpendicular to the longitudinal axis of the tube while rotating the tube as reference to control of the position of the welding head during welding.
    DK 2020 00177 A1 As an example, the end flange itself can be used as a reference surface. Another alternative is to use the surface of the end plate as a reference surface to control the position of the welding head during welding. In concrete embodiments, the end plate has an extent extending at a distance beyond the lateral extent of the end flange, which is given by its diameter 1 in case it is circular, which it normally is. Advantageously, the spacer arm is then provided with rollers or sliders on opposite sides of the end plate for fixing the axial position of the spacer arm in both, opposite directions parallel to the axis of rotation of the tube.
    In some cases the welding unit is supported by a support arm which is connected to a support module and which carries the welding unit. The spacer arm is then, for example, connected to this support arm.
    If the welding unit comprises a welding carriage as described above, which rolls with wheels on the surface of the pipe, the distance profile can be mechanically connected to the welding carriage not only through the support arm, but alternatively extend from the carriage to the end plate.
    If the position of the welding head is maintained in relation to the welding carriage during welding, i.e. no alternating movement of the welding head is made, the distance of the welding head from the end plate will be fixed because it at the spacer arm provides a fixed distance from the welding carriage to the end plate. Adjustment of the distance of the welding head to the end flange parallel to the longitudinal axis of the pipe is then regulated only by the welding arm to which the welding head is attached and which is displaceable in direction parallel to the longitudinal axis of the pipe relative to the welding carriage.
    Thus, if an end flange and end plate are used, a high degree of control of the weld can be obtained due to the fixed distance of the welding unit to the end flange and the end plate.
    In the case where pipe sections are welded together, however, it is an advantage to use a camera for the automatic control. The camera is then functionally connected to the control unit, for example electronically or with wireless data transmission, where the camera
    DK 2020 00177 A1 6 the row is arranged to image the pipe end for the welding. The control unit, in turn, is arranged to receive image signals from the camera and to evaluate the received signals by image analysis by means of its computer and on the basis of the image analysis to adjust the welding with the welding head 1 depending on the image signal to thereby optimize the weld seam. In some embodiments, the welding unit is arranged to automatically move the welding head in direction parallel to an axis of rotation and length of the tube depending on the position of the tube end determined by image analysis during rotation of the tube to adjust the position of the welding automatically depending on the image signal. to follow the position of the end of the pipe during welding. There is an advantage if the pipe is displaced slightly in the axial direction during welding. The image analysis can also be used for automatic control using the computer of the correctness and quality of the weld seam. The speed of the tube's rotation is then also controlled by, for example, the control unit in dependence on the image analysis of the image signals from the camera. Advantageously, the control unit is functionally connected to the motor to control and vary the rotational speed of the motor and thus control the rotational speed of the pipe. Typically, the control unit is electrically and / or electronically connected to the motor to supply the motor with power and control signals, although a wireless data connection is also an option if the support module with the motor has its own power supply.
    Brief Description of the Drawing The invention is described in more detail with reference to the drawing, in which FIG. 1 shows a welding apparatus; FIG. 2 shows the welding unit; FIG. 3 shows the welding unit from the back; FIG. 4 shows the welding head and the arc therefrom; FIG. 5 is a screenshot of camera recording of tube surface; FIG. 6 A) is a close-up of the end plate; B) shows the end plate from a different angle; FIG. 7 shows a distance profile for the welding unit;
    DK 2020 00177 A1 7 FIG. 8) shows an alternative embodiment of the welding apparatus, B) shows a close-up view of the welding head, C) shows a bottom guide for the end plate; FIG. 9 shows stylistically a pendulum movement of the welding head over a straight joint.
    Detailed Description of the Invention FIG. 1 shows a welding apparatus 1, which comprises a number of mobile support modules 2 for supporting a pipe 3, a welding unit 4 for welding an end flange 8 to the pipe 3 or for welding pipes, and a control unit 5 for overall automatic control of the welding. In addition, the control unit 5 is connected to the welding unit 2 with cables for electric current and with hoses for supply with shielding gas. The support modules 2 each comprise a number of support rollers 6 on which the tube 3 rests so that the tube 3 rotates about its longitudinal axis as it rolls on the support rollers 6. At least one of the support modules 2, but typically all support modules 2, is provided with a motor 7 drives the support rollers 6 on the respective support module 2. The motor 7 is controlled by the control unit 5 to provide the correct rotational speed of the pipe 3, which depends on the thickness and diameter of the pipe 3 and the desired weld seam. The control unit 5 also controls the welding unit 4 with regard to electric current and voltage for welding as well as any supply of shielding gas. In a further development, the control unit also controls the position of the welding unit. TIG (Tungsten Inactive Gas) welding is advantageously used, where an arc is created between a tungsten electrode and the material to be welded, for example aluminum or stainless steel. The welding can be performed by feeding a tungsten wire which is fed automatically. In that case, the feed rate is also controlled by the control unit 5. A shielding gas is used during the welding, for example argon or helium, where the quantity is also controlled by the control unit 5.
    In FIG. ] a welding situation is shown in which an end flange 8 is welded on the pipe 3. The welding unit 4 is shown in greater detail in FIG. 2 and comprises a welding carriage 9 on wheels 10 running on the surface of the tube 3. The wheels 10 ensure that the welding head 12 maintains the distance to the tube 3 even with slightly oval tubes 3. On the welding carriage 9 a
    DK 2020 00177 A1 8 welding arm 11, which holds the welding head 12 itself. The distance of the welding head 12 to the carriage 9 can be varied by moving the welding arm 11 relative to the carriage 9. This welding arm 11 also holds a wire supply unit 13 and gas supply 14 around the arc created by welding. . Such an arc 28 is shown in FIG. 4.
    In FIG. 3, the welding unit 4 is shown from the opposite side. The welding carriage 9 is held by one end of an adjustable support arm 15, which with its opposite end is attached to one of the support modules 2. The welding carriage is mounted on the support arm 15 so that it is held in the direction of the longitudinal axis of the pipe but is movable in the direction perpendicular thereto. on so that the wheels can follow the pipe surface. While FIG. 1 shows a welding situation where an end flange 8 has been welded on the pipe 3, then FIG. 4 shows another situation where two tubes 3A, 3B, namely a straight tube 3A and a bend 3B, are welded together by means of the welding unit 4. Typically, the two workpieces to be provided with a weld seam are fastened to each other first by spot welding. to achieve a fixation. For example, in FIG. 4 shows such spot welds 19. Advantageously, the welding procedure is automatic, where the control unit controls the rotational speed of the pipe 3 as well as parameters for a usable weld seam.
    Both when welding a pipe with an end flange 8 and when welding a pipe with another pipe, for example a bend, it is possible to program the control unit 4 to perform the actual welding with a weld seam which seals the joint after spot welding.
    To control the welding itself, in some embodiments, a camera 31 is provided which films the weld. This is for example arranged in the holder as shown in FIG. Such a camera is useful in particular when welding two pipes 3A, 3B together, as there is a risk that the pipes during the rotation change position in the direction of the longitudinal axis.
    A result of the video recording of the camera 16 is shown in FIG. 5, where a camera image 17 is shown as an example on the screen 18 of a monitor. In the camera image 17, two spot welds 19, 19 and the tight space 27 between the two tubes 3A, 3B or alternatively between tube 3 and end flange 8 are clearly seen.
    DK 2020 00177 A1 9 Furthermore, a control unit (not shown) is provided in the control unit 5 with image processing, which evaluates the welding on the basis of image or video recording and which gives the control unit 5 feedback on the course of the welding. For example, a video is recorded with the entire 27-lane of the gap, which is evaluated before actual welding is started. In an advanced version of the welding apparatus 1, an optimal welding procedure and welding path is calculated on the basis of the video recording and any manually entered welding parameters, which include material type and material thickness.
    FIG. 6A and FIG. 6B shows the result of a weld in which an end flange 8 has been welded to a pipe 3. A removable end plate 16 is also illustrated, which is fixed to the end flange 8 by means of screw clamps 20 extending through openings 21 in the end plate 16 for to grip behind the end flange 8. These openings 21 are necessitated by the end plate 16 having a larger diameter than the end flange 8. The end plate 16 closes off for the tube 3 so that the tube 3 can more easily be kept filled with shielding gas during welding, leading to a better welding result than if only gas is supplied from the outside of the pipe 3 during welding.
    The larger diameter of the end plate 16 relative to the diameter of the end flange 8 can advantageously be used as a stop to hold the end flange and thus the tube 3 in place in the direction of the longitudinal axis.
    In FIG. 7, a spacer profile 22 is shown with rollers 23, between which the end plate 16 is arranged. This spacer profile 22 is mechanically connected to the support arm 15 to maintain the distance of the welding carriage 9, and thus the welding head 12, to the end flange 8. Since the welding carriage 9 is also attached to the support arm 15, the spacer profile 22 creates a rigid mechanical connection between the welding carriage 9 and the end plate 16. between the end flange 8 and the welding head 12 and maintains a correct distance of welding seam from the end flange 8. Adjustment of the distance of the welding head 12 to the end flange along the longitudinal axis is then regulated only by the welding arm 11, to which the welding head 12 is fixed and displaceable along the longitudinal axis. with respect to the welding carriage 9. Alternatively, the spacer profile 22 is mechanically connected to the welding carriage 9 and extends from the welding carriage 9 to the end plate 8, in order to maintain the distance of the welding carriage 9, and thus the welding head 12, to the end flange 8.
    DK 2020 00177 A1 10 A slightly modified welding apparatus 1 is shown in FIG. 8A and 8B, where the end plate 16 is attached to the end flange 8 by means of bolts 42 having head and disc which grip the edge 8 'of the end flange 8.
    The holding mechanism for the welding head 12 is in FIG. 8A and 8B provided as a two-part angle profile 25, with which the position and orientation of the welding head 12 can be varied by means of clamping with bolted long holes 35. This angle profile 25 also carries a rotatable holder 30 for the wire supply unit 13, which has a bend joint 34 for angular adjustment of the wire feed unit 13. When the wire feed unit is adjusted in place relative to the welding head 12, the wire will be fed to the correct welding position regardless of the orientation of the angle profile, with both welding head 12 and wire feed unit 13 sitting on same holder. It is noted for the sake of completeness that the welding head 12 and the wire supply unit 13 also both follow the movement of the welding arm 11 towards the longitudinal axis of the pipe and also the movement of the welding carriage 9 in the direction perpendicular thereto due to its wheels rolling on the surface of the pipe 3. Due to the latter, both the welding head 12 and the wire supply unit 13 maintain the correct distance to the surface of the pipe 3, also in the case of oval pipes.
    In order to prevent the tube 3 and the end plate 16 from moving during welding and the rotation of the tube 3, a guide is advantageously provided on the support module 2, for example bottom guide 32, as shown in FIG. 8A and in greater detail in FIG. 8C. The bottom guide 32 allows rotation of the end plate 16 between a set of guide rollers 33, or alternatively guide sliders, but maintains the axial position of the tube 3.
    In some cases the distance between the welding head 12 and the end flange 8 is kept constant so that a weld is made in the form of a curve in a plane perpendicular to the longitudinal axis of the pipe 3 along the adjacent edges between pipe 3 and end flange 8 or correspondingly between adjacent tubes 3A, 3B.
    In other cases, however, it has been found that a welding method can be used to advantage where the welding head oscillates alternately across the actual direction of the weld seam, for example to approximately follow a zigzag path or sine curve across the gap 27. For example, the welding head 12 is moved from one side of the intermediate
    DK 2020 00177 A1 11 the space 27 between the pipes 3A, 3B or the space 27 between the pipe 3 and the end flange 8 and runs slowly or even the lateral movement stops briefly on this side to melt the material next to the space 27 and then moved across the space 27 to the opposite side and make a melting there. In this way, a prepared weld seam can be obtained. As an example, oscillation can be from 1 mm to 10 mm from side to side. This oscillation can be performed while the tube 3 is rotated about its longitudinal axis at a constant or varied speed. For example, the tube is rotated at a constant or varied speed while the welding head is moved from an outer position to an opposite outer position over a distance in the range of 1-10 mm. A typical time period for the movement between extreme positions is in the range of 0.5 to 2 seconds, such as 1 second. As an option, the welding head 12 is held in the outer position for a period of 0.1 to 0.5 seconds, such as 0.2 seconds, after which it is moved back again, thereby performing a oscillating movement.
    A stylistic but not exact illustration of such an alternating path is illustrated in FIG. 9, illustrating a joint in a plane perpendicular to the longitudinal axis 26 of the tube 3.
    By controlling the motor 7 of the support rollers 6 to make a non-constant speed, any predetermined path can be provided by oscillating the welding head 12 from side to side with a lateral movement pattern and rotating the tube 3 according to a predetermined rotation. speed pattern, which is controlled by the control unit 5.
    Reference numbers 1 welding apparatus 2 support module 3, 3A, 3B pipes 4 welding unit 5 control unit 6 support roller 7 motor for the support rollers 6 8 end flange 9 welding carriage
    DK 2020 00177 A1 12 10 wheels of welding carriage 9 11 welding arm 12 welding head 13 wire supply unit 14 gas supply
    15 support arm 16 end plate 17 camera image 18 screen
    19, 19A, 19B spot welds 20 screw clamps 21 openings in end plate 16 22 spacer profile 23 roll around end plate for guiding spacer profile 22
    24 bolts for holding end plate 16 25 adjustable profile for holding welding head 12 26 longitudinal axis of pipe 3 27 spacing between two pipes 3A, 3B or between pipe 3 and end flange 8 28 arc
    29 oscillating movement of the welding head over the gap 27 30 rotatable holder for wire supply unit 13 31 camera 32 bottom guide for fixing the end plate 16 in the direction of the longitudinal axis 26 guide rollers for bottom guide 32
    34 bend joints for holder 30 long holes in adjustable profile 25
    权利要求:
    Claims (14)
    [1]
    A method of welding a pipe (3) with an adjacent second pipe (3B) or with an adjacent end flange (8) by means of a weld seam; wherein the method comprises providing a welding apparatus (1) arranged for automatic welding of pipes (3), the welding apparatus (1) comprising a support module (2), a welding unit (4), and a control unit (5); wherein the support module (2) comprises a motor-driven support (6) for supporting the pipe (3) and for motor-driven rotation of the pipe (3) about its longitudinal axis (26) by means of a motor (7); wherein the welding unit (4) comprises a welding head (12) for providing a welding seam for welding the pipe (3) at its end; wherein the control unit (5) is operatively connected to the welding unit (4) and the motor support (6) to control the welding automatically; wherein the method comprises - placing the welding head (12) at the desired position of the welding seam; - to rotate the tube (3) automatically about its longitudinal axis (26) with the motor support (6) at a rotational speed of the tube (3), - to provide the welding seam with automatic welding by means of the control unit (5) of the welding unit (5); 4) and the motor (7) while rotating the tube (3).
    [2]
    A method according to claim 1, wherein the welding unit (4) comprises a movable welding arm (11) holding the welding head itself (12), the welding arm (11) being automatically movable to move the welding head (12) in a direction parallel to a longitudinal and rotational axis (26) of the tube (3), this movement being controlled by the control unit (5) during welding, thereby adjusting the position of the welding head (12) by means of the control unit (5), where the method of welding at the end of the tube (3) comprises oscillating the welding head (12) automatically and periodically in a direction parallel to the axis of rotation of the tube (3) from one side of the end of the tube (3) across the end of the tube (3) and onto the adjacent tube (3B) or the adjacent flange (8) for heating the metal of the pipe (3) and the adjacent pipe (3B) or the adjacent end flange (8) along an alternating path to form the weld seam between the pipe (3) and the adjacent pipe (3B) or the adjacent end flange (8).
    [3]
    A method according to claim 2, wherein the welding unit (4) comprises a welding carriage (9) on which is mounted the movable welding arm (11) holding the welding head itself.
    DK 2020 00177 A1 14 vedet (12), where the welding arm (11) is automatically movable relative to the welding carriage (9) in a direction parallel to a longitudinal and rotational axis (26) of the pipe (3) for adjusting the distance of the welding head (12) from the welding carriage (9) to thereby move the welding head (12) relative to the welding carriage (9) in a direction parallel to a longitudinal and rotational axis (26) of the tube (3), where the welding carriage (9) is movably mounted 1 a direction perpendicular to the longitudinal axis (26) of the tube (3) and comprises wheels (10) running on the surface of the tube (3) during rotation of the tube (3), so that the welding carriage (9) follows the tube (3) surface, wherein the method comprises performing the welding automatically by rotating the pipe (3) in a direction of rotation, while the welding carriage (9) rolls on the surface of the pipe (3) in a direction perpendicular to the longitudinal axis (26) of the pipe (3) .
    [4]
    A method according to any one of the preceding claims, wherein the method comprises fixing an end flange (8) on the end of the pipe (3) before forming the weld seam with the welding head (12) and temporarily mounting an end plate (16) on an abutment surface of the end flange (8), the end plate (16) covering the end flange (8) and thereby closing off the end of the pipe (3); wherein the method further comprises filling shielding gas for welding into the pipe (3) and preventing leakage of shielding gas through the end flange (8) by means of the end plate (16), as well as disassembling the end plate (16) again after welding.
    [5]
    A method according to claim 4, wherein the method comprises arranging a plurality of fastening units (20, 42) for clamping the end plate (16) against the abutment surface of the end flange (8) with the fastening units (20, 42), the fastening units (20, 42) grips one side of the end flange (8) opposite the abutment surface of the end flange (8) to the end plate (16).
    [6]
    A method according to claim 4 or 5, wherein the end plate (16) has an extension extending 1 a distance beyond the lateral extension of the end flange (6), and wherein the method comprises providing a spacer arm (22) which mechanically holds the welding carriage (9) at a fixed distance to the end plate (16), the spacer arm (22) sliding or rolling long with a surface of the end plate (16) during rotation of the tube (3) and rotation to the end flange (8) attached thereto and end plate (16), and wherein the method comprises using this surface of the end plate (16) as a reference for controlling the position of the welding head (12) relative to the end (3) of the pipe during welding.
    DK 2020 00177 A1 15
    [7]
    A method according to claim 4, 5, or 6, wherein a guide (32) is provided, which is attached to the support module (2) and which comprises a set of guide rollers (33) or guide sliders in abutments on both sides of the end plate (16), which fixes the position of the end plate (16) and thus the end flange (8) in the direction of the longitudinal axis (26) of the pipe (3) during welding but allows an unhindered rotation of the end plate (16) through the guide (32).
    [8]
    A method according to any one of claims, the method comprising providing a camera (31) operatively connected to the control unit (5), the camera (31) being arranged to image the end of the tube (3) as well as the corresponding tube. (3B) or the adjacent end flange (8) for the weld, and wherein the control unit (5) is arranged to receive image signals from the camera (31) and to evaluate the received signals by image analysis and to adjust the weld with the welding head (12) on the basis of the image analysis. ) depending on the image signal to thereby optimize the weld seam.
    [9]
    A method according to claim 9, wherein the welding unit (4) is arranged for automatic movement of the welding head (12) in a direction parallel to the longitudinal axis (26) of the pipe (3); wherein the method comprises moving the welding head (12) automatically depending on the position of the tube (3) determined by image analysis during rotation of the tube (3) and adjusting the position of the welding automatically depending on the image signal to follow the position of the tube (3) end.
    [10]
    A method according to claim 9 or 10, wherein the control unit (5) is operatively connected to the motor (7) for controlling and varying the rotational speed of the motor (7) and thereby controlling the rotational speed of the tube (3); wherein the method comprises varying the speed of rotation of the tube (3) with the control unit (5) depending on the image analysis of the image signals from the camera (31).
    [11]
    A welding apparatus arranged for automatic welding of pipes, the welding apparatus comprising a support module (2), a welding unit (4), and a control unit (4), the support module (2) comprising motor rollers (6) for supporting a tube (3) and motor-driven rotation of the tube (3) about its longitudinal axis (26) by means of a motor (7) when the tube (3) rests on the rollers (6); where the control unit (5) is
    DK 2020 00177 A1 16 functionally connected to the motor (7) for controlling and varying the speed of the motor (7) and thereby controlling and varying the rotational speed of the pipe (3); wherein the welding unit (4) comprises a welding head (12) for providing a welding seam at one end of the pipe (3) for welding the pipe (3, 3A) together with another, adjacent pipe (3B) or with an adjacent end flange (8) ; wherein the control unit (5) is operatively connected to the welding unit (4) for automatically controlling parameters for generating the weld seam with the welding head (12) as well as any addition of shielding gas to the weld seam during welding; wherein the welding unit (4) comprises a welding carriage (9) with wheels (10) running on the surface of the pipe (3) during the rotation of the pipe (3), so that the welding carriage (9) follows the surface of the pipe (3); wherein the welding carriage (9) is mounted a movable welding arm (11) holding the welding head itself (12), the welding arm (11) being automatically movable relative to the welding carriage (9) in a direction parallel to a longitudinal and rotational axis (26). ) of the tube (3) for adjusting the distance of the welding head from the welding carriage (9), thereby moving with control from the control unit (5) relative to the welding head (12) relative to the welding carriage (9) in a direction parallel to the longitudinal and rotational axis ( 26) of the tube (3).
    [12]
    A welding apparatus according to claim 12, wherein on the welding unit (4) is provided a spacer arm (22) comprising a slider or a roller (23) arranged to slide or roll longitudinally along a reference surface perpendicular to the tube (3), respectively. longitudinal axis (26) during rotation of the pipe (3) as a reference for controlling the position of the welding head (12) during welding.
    [13]
    A welding apparatus according to claim 12 or 13, wherein the support module (2) comprises a support arm to which the welding unit (4) is attached, the control unit (5) also comprising power supply to the welding unit (4) and a power supply to the motor (7). ), and where the support module (2) and the welding unit (4) are connected to the control unit (5) only with cables and hoses but are not mechanically fixed to the control unit to facilitate assembly and disassembly as well as loading and unloading in connection with transport. of the support module (2), the welding unit (4) and the control unit (5) in a van.
    [14]
    A welding apparatus according to claim 12, 13 or 14, wherein the welding apparatus comprises a camera (31) adapted to image the end (3) of the tube and the weld seam; where con-
    DK 2020 00177 A1 17 The trolley unit (5) is functionally connected to the camera (31) for receiving image signals from the camera (31) and configured to evaluate the received signals by image analysis and to adjust the welding with the welding unit on the basis of the image analysis (4) depending on the image signal, thereby optimizing the weld seam; wherein the control unit (5) by welding along the end of the tube (3) is arranged to oscillate the welding head (12) automatically and periodically in a direction parallel to the axis of rotation of the tube (3) from one side of the end of the tube (3) across the end of the pipe (3) and onto the adjacent pipe (3B) or the adjacent end flange (8) to heat the metal of the pipe (3) and the adjacent pipe (3B) or the adjacent end flange (8) along an alternating path to form the weld seam between the pipe (3) and the adjacent pipe (3B) or the adjacent end flange (8).
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    同族专利:
    公开号 | 公开日
    DK180495B1|2021-05-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2021-05-27| PAT| Application published|Effective date: 20210527 |
    2021-05-27| PME| Patent granted|Effective date: 20210527 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA202000177A|DK180495B1|2020-02-13|2020-02-13|Welding apparatus|DKPA202000177A| DK180495B1|2020-02-13|2020-02-13|Welding apparatus|
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