• 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 conduit manufacturing apparatus includes a first station (112) configured to accept a sheet of malleable material and a second station configured to receive the sheet of malleable material from the first station. The first station (112) includes a mechanism for forming one of a male locking bend and a female locking joint in a leading edge of the sheet of malleable material. The second station includes a retractable conveyor. Movement of the material sheet from the first station (112) to the second station defines an axis of movement of the material sheet. The retractable conveyor is selectively movable from a first position in which the retractable conveyor is in close association with the first station (112) and to a second position in which the retractable conveyor is spaced from the first station. Figure to be published with the abstract: [Fig. not]
    公开号:FR3103719A1
    申请号:FR2012651
    申请日:2020-12-03
    公开日:2021-06-04
    发明作者:Randy Runyan
    申请人:Mestek Machinery Inc；
    IPC主号:
    专利说明:

    [0001] Technical field of the invention
    [0002] This application is a divisional application claiming the benefit of U.S. application series No. 15 / 258,124 filed September 7, 2016, which is a subdivision of U.S. application series No. 14 / 163,038 filed January 24, 2014 (patent no. No. 9,459,019 issued October 4, 2016), which further claims the benefit of Provisional Application Series No. 61 / 756,226, filed January 24, 2013, US Provisional Application Series No. 61 / 766,207, filed on February 19, 2013, which describe metalworking apparatus and processes.
    [0003] The present invention relates generally to metalworking apparatus and methods and more particularly to an apparatus and method for bending metal strip to form ventilation ducts.
    [0004] State of the prior art
    [0005] Parallelepipedal ducts are widely used in heating and ventilation systems to distribute heated or cooled air throughout a structure. The ducts are usually formed into sections of predetermined lengths which are then connected to form a continuous air distribution duct. The material from which the duct sections are formed is metal strip of the desired thickness gauge supplied from a roll or reel of material. As the metal strip unwinds, it is flattened or straightened to eliminate the curve that has formed in the material as it is coiled. The metal strip is then notched along its side edges at predetermined distances where the corners of the duct section will be formed. A shear then cuts the material into blanks of the length necessary to form a finished section of conduit. This notched blank is then moved at a 90 ° angle in a roll forming machine to form the male and female sections of a locking seam at opposite ends of the blank. The blank is then transferred again, usually at an angle of 90 °, to a roll forming machine to form the flanges that will allow the connection of the individual sections of conduit. Once the flanges are formed, the blank is then transferred to a metal strip station where 90 ° bends are made to form the box-shaped section of conduit.
    [0006] As will readily be appreciated, transferring material both longitudinally and laterally from station to station to form the locking joints and flanges requires an enormous amount of floor space for equipment, conveyors and tables. transfer between stations. Large spaces are therefore often required to accommodate the width of existing duct making machines, which increases overall operating costs.
    [0007] There is a need for an improved method and apparatus for forming sections of conduit which minimizes the amount of floor space required to complete the entire forming process and which enables sections of conduit to be formed faster. and more efficiently and at a lower cost than existing devices.
    [0008] An object of the present invention is to provide an automatic duct fabrication apparatus for positioning and forming metal.
    [0009] An object of the present invention is to provide a duct fabrication apparatus for bending metal strips to form ventilation ducts.
    [0010] Another object of the present invention is to provide a duct making apparatus which is smaller and suitable for commercial areas too small for existing duct forming machines.
    [0011] Another object of the present invention is to provide a conduit fabrication apparatus which is capable of creating various types of conduits, including welded flange and raw edge connections using slip-on-flange technology.
    [0012] Another object of the present invention is to provide an apparatus for manufacturing ducts which is narrow in width compared to existing systems.
    [0013] Another object of the present invention is to provide a conduit manufacturing apparatus which is competitive with existing wide cavity systems.
    [0014] Another object of the present invention is to provide a duct making apparatus which is designed to move a piece of duct blank straight forward during forming operations without moving the duct blank laterally or without inverting. the duct blank in the opposite direction to carry out the finishing operations of the duct section.
    [0015] Another object of the present invention is to provide a conduit manufacturing apparatus which substantially eliminates the use of servo motors to position the conduit blank during forming operations.
    [0016] In accordance with one embodiment of the present invention, a conduit manufacturing apparatus includes a first station adapted to accept a sheet of malleable material and a second station adapted to receive the sheet of malleable material from the first station. The first station includes a mechanism for forming one of a male locking bend and a female locking joint in a leading edge of the sheet of malleable material. The second station includes a retractable conveyor. The movement of the material sheet from the first station to the second station defines an axis of movement of the material sheet. The retractable conveyor is selectively movable from a first position in which the retractable conveyor is in close association with the first station and to a second position in which the retractable conveyor is spaced from the first station.
    [0017] According to another embodiment of the present invention, an apparatus for manufacturing conduits is provided. The duct manufacturing apparatus includes a first station adapted to receive a sheet of malleable material, a second station adapted to receive the sheet of malleable material from the first station, and a third station including a roll forming assembly. The second station includes a conveyor to move the sheet of material along an axis of travel. The roll forming assembly is selectively movable in and out of a space between the first station and the second station in a direction orthogonal to the axis of travel.
    [0018] According to yet another embodiment of the present invention, a method of forming a section of conduit from a web of material is provided. This method including the steps of, in a first station, forming an element of a male locking bend and a female locking joint in a leading edge of the web of material, in a second station, for receiving the material. strip of material from the first station and, in a third station, forming the other of a male locking bend and a female locking seam in a trailing edge of the material strip.
    [0019] This disclosure also relates to the following:
    [0020] A duct fabrication apparatus, comprising a first station adapted to accept a sheet of malleable material; a second station adapted to receive said sheet of malleable material from said first station, said second station including a conveyor for moving said sheet of material along an axis of travel; a third station including a roll forming assembly, said roll forming assembly being selectively movable inward and outward from a space between said first station and said second station in a direction orthogonal to said axis of shift ; and said roll forming assembly being adapted to engage a trailing edge of said conduit blank to form a female locking joint.
    [0021] Said first station may include a mechanism for shearing said sheet of material to create a conduit blank and to form a male locking bend in a leading edge of said conduit blank.
    [0022] Said second station may include a retractable conveyor, said retractable conveyor being selectively movable from a first position in which said retractable conveyor is in close association with said first station, and a second position in which said retractable conveyor is spaced from said first station for allow passage of said roll forming assembly.
    [0023] Said retractable conveyor, when in said first position, can support an underside of said sheet of material.
    [0024] Said first station may further include a coil straightener for straightening said sheet of material received from a coil and a notching section adapted to make notches in corners of said sheet of material.
    [0025] Said second station may further comprise a positioning stop, said positioning stop being selectively movable between a through position in which said duct blank is allowed to pass said positioning stop, and an engagement position in which said follower edge of said conduit blank may come into contact with said positioning stop; said positioning stop being adapted to position said conduit in alignment with said roll forming assembly.
    [0026] Said second station may further include at least one clamping mechanism, said clamping mechanism being selectively movable between a through position in which said clamping mechanism is spaced from said duct blank, and a clamping position in which said clamping mechanism may be in contact with said conduit blank.
    [0027] Brief description of the figures
    [0028] The present invention will be better understood by reading the following description of non-limiting embodiments with reference to the accompanying drawings, knowing that, below:
    [0029] The is a schematic plan view of an apparatus for manufacturing U-shaped conduits corresponding to the prior art.
    [0030] The is a schematic plan view of another apparatus for manufacturing U-shaped conduits corresponding to the prior art.
    [0031] The is a schematic plan view of another Z-shaped conduit fabrication apparatus corresponding to the prior art.
    [0032] The is a schematic plan view of another Z-shaped conduit fabrication apparatus corresponding to the prior art.
    [0033] The a top plan view of an apparatus for positioning and forming metal in accordance with one embodiment of the present invention.
    [0034] The is a side elevational view of the apparatus of the .
    [0035] The is a side elevational view of a positioning stopper of the apparatus according to , shown in its raised through position.
    [0036] The is a side elevational view of a positioning stop for the apparatus of the , illustrating the positioning stop in a lowered engagement position with a sheet held in a slightly inverted position.
    [0037] The is a side elevational view of a conveyor and retaining clip of the apparatus of the , showing the retaining clip in a through-raised position.
    [0038] The is a side elevational view of the conveyor and retaining clip of the , showing the retaining clip in a lowered clamping position.
    [0039] The is a side elevational view of an interlocking joint roll forming device of the apparatus of the , showing the positioning stop of the in its raised through position.
    [0040] The is an exploded and side elevational view of the conveyor with the retractable conveyor section in its extended position ready to receive a sheet as it exits the shear.
    [0041] The is another top plan view of the metal positioning and forming apparatus of the , showing a more detailed illustration of it.
    [0042] The is a side elevational view of the metal positioning and forming apparatus of the , showing a more detailed illustration of it and showing the retractable conveyor in the extended position.
    [0043] The is a side elevational view of the metal positioning and forming apparatus of the , showing a more detailed illustration thereof and showing the retractable conveyor in a retracted position.
    [0044] The is a side elevational view of the metal positioning and forming apparatus of the , showing a more detailed illustration thereof and showing the positioning of the roll forming assembly.
    [0045] The is an end view of a section of duct made using the apparatus of the with the interlocking joints and bends that complete a rectangular duct section.
    [0046] Detailed description of the invention
    [0047] Figures 1 to 4 are schematic views of known automatic duct manufacturing systems 10, 20, 30, 40 for manufacturing finished duct sections. Each of these systems 10, 20, 30, 40 includes an initial end 12, a locking joint roll forming section 14, and a terminal end 16. As seen here, with each of these systems 10, 20, 30 , 40, a metal strip is unwound from large size rolls or coils 18. As is well known to those skilled in the art, the width of the coil 18 determines the length of the finished section of conduit.
    [0048] A conduit blank is cut from coil 18 and advanced in a first direction, for example from right to left as shown in Figures 1 to 4. The conduit blank is then moved in a second direction substantially perpendicular to the first. direction (eg top to bottom or bottom to top as shown in Figures 1-4) and passes through the roll forming section 14. The roll forming section 14 has roll forming stations which are oriented perpendicular to the first direction of movement and respectively male and female locking joints on opposite edges of the duct blank as the duct blank passes through. The conduit blank is then advanced in a third direction generally parallel to the first direction for subsequent bending and finishing operations before arriving at terminal end 16 as a substantially finished section of conduit.
    [0049] As will be readily appreciated, the conduit blank must be moved in a direction substantially perpendicular to the first initial direction of movement in order to pass through the roll forming stations of the roll forming section 14 to form the roll forming stations. male and female locking joints. As a result, the prior art conduit making apparatus conventionally takes a U-shaped configuration, as illustrated by the conduit making apparatuses 10, 20 shown in Figures 1 and 2, or a U-shaped configuration. Z-shaped, as illustrated by the duct fabrication apparatuses shown in Figures 3 and 4. However, the U-shaped and Z-shaped apparatuses require a great deal of floor space due to the need to move the pipe. Pipe blanks perpendicularly through the roll forming section 14 and are therefore often substantially wider than appropriate in many pipe manufacturing shops. In fact, the devices 10, 20, 30, 40 shown in Figures 1 to 4 are approximately 25 feet (7.62 m) wide, which requires a large space to house these devices.
    [0050] Turning now to Figures 5 and 6, one embodiment of a metal positioning and forming apparatus 100 of the present invention solves the problem of limited floor space in many duct manufacturing shops, between others, by providing a substantially linear path of movement of the conduit blank through the apparatus 100, even through the roll forming section which forms the male and female locking joints.
    [0051] As seen here, the metal positioning and forming apparatus 100 includes at least an initial end 110, a first station 112, a second station 114, a third station 116, and a terminal end 118 disposed around a common axis. At the initial end 110, a metal strip of the desired thickness and width gauge is supplied in large size rolls or coils 120. As is well known to those skilled in the art, the sheet of metal material from a coil. coils 120 is fed by a feeder (not shown) into the first station 112. The first station includes a coil rectifier 122, a notching section 124, and a bending shear 126, each of which can take one of various shapes known in the art.
    [0052] The coil straightener 122 contains a plurality of rollers which will eliminate the shape taken by the material due to its winding on a coil 120. The coil straightener 122 thus straightens the material and brings the web of material into the notching section. 124 which makes notches in the corners when needed to give the duct section its style. Notch section 124 is programmed to notch the side edges of the web of material at predetermined distances where the material will end up being bent to form the box-shaped section of conduit. In other words, the distance between the notches will correspond to the dimensions of the finished duct section.
    [0053] The web of material then moves forward from right to left in Figures 5 and 6, into the bending shear 126 of the first station 112. The bending shear 126 bends the leading edge of the web of material using an integrated forming die assembly to form a male interlocking joint and then begins to shear the web of material to make a generally rectangular duct blank flat pattern. Movement of the web of material along the path defined by apparatus 100 from the initial end 110 to the terminal end 118 defines an axis of movement of the web.
    [0054] Referring further to Figures 5 and 6, the second station 114 is positioned in line with the first station 112 in a linear direction of travel of the duct blank (i.e. the axis of travel) and includes a retractable conveyor 128 , a feed conveyor 130 and a stop and clamp assembly 132. As best shown the , the stop and clamp assembly 132 includes a vertically movable clamp 134 and a pivoting stop 136. The clamp 134 and the stop 136 can be actuated hydraulically, pneumatically or electrically although any other means of actuation of the clamp. clamp 134 and stopper 136 along their constrained travel path known in the art could also be used without derogating from the broader aspects of the present invention.
    [0055] Stop 136 can be selectively rotated between a raised through position, as illustrated by , and a lowered engagement position, as illustrated by , as discussed in detail below. Likewise, the gripper 134 is selectively movable between a raised position in which the gripper 134 is spaced from a conduit blank carried on the retractable conveyor 128, as shown in Fig. , and a lowered clamping position in which the clamp 134 touches the conduit blank and holds it against the retractable conveyor 128, as also discussed in detail below.
    [0056] In particular, the retractable conveyor 128 of the second station 114 is movable linearly in the direction of the arrow A, as shown in the figure. . In particular, the retractable conveyor 128 is linearly movable between a first position in close association with the first station 112, as shown in Fig. , and a second position in which the retractable conveyor 128 is spaced from the first station 112, as shown in figure .
    [0057] In operation, when the male locking joint is formed in the leading edge of the duct blank and the duct blank is separated from the web of material, the retractable conveyor 128 is advanced against it. from the direction of travel of the metal strip to the extended position shown on the . At the same time, the clamp 134 and stop 136 are moved to their through-retracted position, allowing the conduit blank to advance downward. In this position, the retractable conveyor 128 supports the web as it is brought forward and cut to the proper length by the bending shears 126, and prevents the web from bending or sagging, which could cause a jam. . The retractable conveyor 128 remains in this extended position until the conduit blank has passed through the stop and clamp assembly 132, at which time the conveyor 128 retracts and is positioned for a roll forming operation. following as explained below.
    [0058] In particular, once the trailing edge of the conduit blank has passed the stop 136, the stop rotates downward to its engaged position as illustrated by Fig. . Conveyor 128 then changes direction again, moving the duct blank upstream until the following edge of the duct blank contacts stop 136. At this position, the gripper 134 is brought into the clamping position shown on the in order to clamp the conduit blank against the retractable conveyor 128. Once the conduit blank is clamped in the correct position, the stopper 136 again rotates to its retracted through position shown on the figure. . While the figures of the present invention illustrate the use of a single clamp 134 and a single stop 136, more than one clamp 134 and one stop 136 may be used to provide additional clamping and alignment, respectively. without derogating from the broader aspects of the present invention.
    [0059] Referring to Figures 11-13 and 16, the third station 116 includes a female interlocking joint roll former 140 with a plurality of die pairs. In the preferred embodiment, the roll former 140 generally takes the form of any roll former commonly known in the art which is used to form locking seams of various styles. In particular, the roll former 140 can be designed to form any style of interlocking seam, such as a Pittsburgh seam or a Snaplock seam, on the trailing edge of the conduit blank as explained below. What is important is that the roll former 140 is mounted on a laterally traversing frame 142 which is positioned between the first station 112 and the second station 114.
    [0060] Once the conduit blank is clamped in position by the clamp 134, and the conveyor 128 is spaced from the first station 112, the roll former 140 of the third station 116 moves in a direction substantially perpendicular to the line. axis of movement of the conduit blank and engages the trailing edge of the conduit blank. Roll former 140 traverses the trailing edge of the conduit blank perpendicular to the linear direction of travel of the conduit blank, thereby forming a female locking joint. The traversing of the roll forming head 140 can be accomplished using hydraulic, pneumatic or electrical means, although any other means known in the art can also be used without derogating from the broader aspects of the present invention. As explained in detail below, an important aspect of the present invention is that the head of the roll former 140 is selectively movable orthogonally to the axis of movement of the web of material through the apparatus 100.
    [0061] After forming the female locking joint in the follower edge of the conduit blank, the clamps 134 are released and the conduit blank is linearly moved down from the second station 114 by a stationary feed conveyor 130 for additional operations. In particular, once the joins are made, the conveyor 128 retracts (moves to the left on the ) and the gripper 134 rises to its through position allowing the duct blank to advance downstream through the system upon reaching the infeed conveyor 130. Once the trailing edge of the The conduit blank sits completely on conveyor 130, roll former 140 is inverted and moves to its original home position on one side of apparatus 100. Retractable conveyor 128 is then extended to its adjacent home position at the first station 112 so that the process can be repeated for another section of pipe.
    [0062] With reference to the above, additional operations can be performed downstream after the formation of the male and female locking joints. In one embodiment, the conduit blank can advance forward through the system by reaching the feed conveyor 130, the cross connection / cross flange roll former 144, the brake feed conveyor 146. , the bending brake 148 and finally the exit terminal conveyor 150, thereby following a fully automatic cycle generating a finished section of conduit. These following operations can be any of the operations known in the art of forming duct sections, including but not limited to flange forming at the ends of the duct section and bending the duct section to form a closed duct.
    [0063] In particular, the transverse connection roll former 144 may take any shape known in the art to form any type of transverse flange known in the art. In addition, the apparatus 100 of the present invention is capable of creating all styles of piping, including welded flange and raw edge connections using flange slip technology in a fully automatic manner. As will readily be appreciated, the conduit fabrication apparatus 100 of the present invention is capable of fabricating any style of piping by adding any downstream bending / forming stations necessary to achieve the desired style.
    [0064] In one embodiment, apparatus 100 may include a computer or programmable logic controller (not shown) and a plurality of switches, sensors, and timers that operate in conjunction with each other and as a function of a set of. 'instructions saved in a memory. In particular, all operational sequences of forming a finished pipe section can be performed automatically under computer control or programmable logic control in conjunction with switches, sensors and timers.
    [0065] Referring further to Figures 13-16, in one embodiment, apparatus 100 may include locating pins 152 serving as an alternative means of correctly positioning the duct blank on conveyor 128 for operation. following female lock joint forming. As seen here, the locator pins 152 are pivotably mounted on the second station 114. In operation, the conveyor 128 retracts to a position which allows the locator pins to pivot downward. Once positioned at the bottom, the conveyor 128 is reversed to transport the conduit blank upstream until it contacts the locator pins 152. In one embodiment, the pins 152 can themselves be used to make a circuit confirming that the trailing edge of the duct blank is in the correct position. Other detection means known in the art can also be used without departing from the broader aspects of the present invention. Once it is confirmed that the conduit blank is in the correct position, the retaining clips 134 are extended to clamp the conduit blank to the frame of the conveyor. The retaining clamps hold the conduit blank in the correct position during retraction of the locating pins 152 during the roll forming operation, as explained above.
    [0066] A finished duct section 200 produced by the duct manufacturing apparatus 100 of the present invention is shown in FIG. . As seen, the finished duct section has a male locking joint 210 formed by the bending shear 126, a female locking joint 212 formed by the transversely movable roll former 140, and a plurality of bends 214 which complete the process. rectangular duct section. The cross-end connections formed by the cross-connect roll former 144 are omitted on the figure. .
    [0067] As will be readily appreciated, if the roll former 140 is mounted on a laterally movable frame 142, the roll former 140 can move orthogonally through the trailing edge of the stationary duct blank to form the bend of the tube. female lock. This contrasts with existing systems which usually set the duct blank in motion and move the blank laterally (i.e. orthogonally to the original direction of travel) through a stationary roll forming device to form. both male and female locking joints. Since the need to move the duct blank laterally is eliminated by providing the transversely movable roll former 140, all of the stations of the apparatus 100 of the present invention can be aligned linearly in opposition to a "configuration". U "or" Z "as required in the art to do this. With this linear arrangement of stations, the sheet of material and the conduit blank cut therein can be brought entirely linearly through the entire apparatus 100, from the initial end 110 to the end end 118.
    [0068] As a result of this configuration, the apparatus 100 of the present invention is much narrower than existing duct fabrication apparatuses designed to process a sheet of material of the same size. In particular, in one embodiment, the duct fabrication apparatus 100 of the present invention may be approximately half the width of finished duct fabrication systems of the prior art. As will immediately be appreciated, due to this smaller and narrower footprint, the 100 device can be used in smaller stores, allowing this type of small store to compete with larger stores. using existing duct manufacturing systems while controlling costs and quality.
    [0069] With existing systems, there is a need to move various sizes and thickness gauges of material sheets by lateral movements to form the locking joints, which usually requires various guiding and adjustment constraints to move the sheets in. square and precisely without jams, discharge conditions or distortion problems. With the apparatus 100 of the present invention, however, these problems are eliminated because the sheet of material / duct blank moves in a straight line from start to finish, which allows for simple transportation.
    [0070] In addition to the above, the apparatus 100 of the present invention allows a return to a previous notching and assembly more suited to usual methods allowing to have minimum openings at the corners of the duct sections. This is desirable for mechanical contractors because it reduces the costs required to process unnecessary holes in the notched corner area. This contrasts with many existing systems which form a drive wedge before shearing the conduit blank to length and then form the locking joints, which creates a substantial notch removal requirement for the wedge is not crushed during the assembly operation.
    [0071] In the appended claims, the terms "including" and "in lesquel (le) s" are used as the equivalent in good French of the respective terms "comprising" and "where". In addition, in the following claims, the terms "first", "second", "third", "upper", "lower", "bottom", "top", "top", "bottom", etc., are used merely as indicators and are not intended to impose numerical or positional demands on their objects. Further, the limitations of the following claims are not written in medium plus function format and are not intended to be interpreted based on 35 USC § 112, sixth indent, unless and until such limitations claims do not explicitly use the phrase "means of" followed by a statement of an invalidation of function of other structures.
    [0072] This written description uses examples to disclose several embodiments of the invention, including the best mode, and also enables anyone skilled in the art to practice the embodiments of the invention, including the manufacture and preparation. 'use of any devices or systems and the carrying out of all incorporated processes. The patentable scope of the invention is defined by the claims and may include other examples encountered by those skilled in the art. Other examples of this type are intended to be within the scope of the claims if they have structural elements which do not differ from the literal wording of the claims or if they include equivalent structural elements having non-substantial differences from the literal wordings of the claims. claims.
    [0073] As used herein, an element or a step mentioned in the singular and preceded by the word "a" or "a" is to be understood as not excluding a plurality of said elements or steps, unless such exclusion is not mentioned explicitly. Further, references to "an embodiment" of the present invention are not intended to be construed as excluding the existence of additional embodiments which also incorporate the mentioned features. In addition, unless explicitly stated otherwise, embodiments "comprising", "including" or "having" an element or a plurality of elements having a particular property may include such additional elements not having such a property. property.
    [0074] Because certain changes may be made to the duct-making apparatus described above without departing from the spirit and scope of the invention in question, the intention is that all of the subject matter description above or presented in the accompanying drawings should be interpreted purely as examples illustrating the inventive concept which is contained and should not be understood as limiting the invention.
    权利要求:
    Claims (7)
    [0001]
    A conduit fabrication apparatus (100), comprising: a first station (112) adapted to accept a sheet of malleable material; a second station (114) adapted to receive said sheet of malleable material from said first station (112), said second station (114) including a conveyor for moving said sheet of material along an axis of travel; a third station (116) including a roll forming assembly, said roll forming assembly being selectively movable in and out of a space between said first station (112) and said second station (114) in a direction orthogonal to said axis of movement; and said roll forming assembly being adapted to engage a trailing edge of said conduit blank to form a female locking joint.
    [0002]
    A conduit manufacturing apparatus (100) according to claim 1, wherein: said first station (112) includes a mechanism for shearing said sheet of material to create a conduit blank and to form a male locking bend in a leading edge of said conduit blank.
    [0003]
    A conduit manufacturing apparatus (100) according to claim 2, wherein: said second station (114) includes a retractable conveyor (128), said retractable conveyor (128) being selectively movable from a first position in which said retractable conveyor (128) is in close association with said first station (112), and a second position in which said retractable conveyor (128) is spaced from said first station (112) to allow passage of said roll forming assembly.
    [0004]
    A conduit manufacturing apparatus (100) according to claim 3, wherein: said retractable conveyor (128), when in said first position, supports an underside of said sheet of material.
    [0005]
    A conduit manufacturing apparatus (100) according to claim 1, wherein: said first station (112) further comprises a coil straightener (122) for straightening said sheet of material received from a coil and a notching section (124) adapted to make notches in corners of said sheet of material. material.
    [0006]
    A conduit manufacturing apparatus (100) according to claim 1, wherein: said second station (114) further comprises a positioning stop, said positioning stop being selectively movable between a through position in which said duct blank is allowed to pass said positioning stop, and an engaging position in which said edge follower of said conduit blank comes into contact with said positioning stop; said positioning stop is adapted to position said conduit in alignment with said roll forming assembly.
    [0007]
    A conduit manufacturing apparatus (100) according to claim 6, wherein: said second station (114) further includes at least one clamping mechanism, said clamping mechanism being selectively movable between a through position in which said clamping mechanism is spaced from said duct blank, and a clamping position in which said mechanism clamp is in contact with said conduit blank.
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    US9459019B2|2016-10-04|
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    US10527314B2|2020-01-07|
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    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    法律状态:
    2021-12-24| PLFP| Fee payment|Year of fee payment: 2 |
    优先权:
    申请号 | 申请日 | 专利标题
    US201361756226P| true| 2013-01-24|2013-01-24|
    US201361766207P| true| 2013-02-19|2013-02-19|
    US16/701,768|US20200103137A1|2013-01-24|2019-12-03|Method and apparatus for metal positioning and forming|
    US16/701768|2019-12-03|
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