Clamping device for welding special-shaped doors and windows

Abstract

The invention belongs to the field of welding equipment, and provides a clamping device used for welding special-shaped doors and windows, the clamping device comprises a workbench, a clamp, a tray and a clamping tool, the clamp comprises at least four pairs of clamping rollers used for being matched with linear parts of the special-shaped doors and windows, the clamping tool is used for clamping arc parts of the special-shaped doors and windows to be matched, and the clamping tool comprises a concentric-square-shaped groove plate; four clamping plates which are symmetrically distributed in pairs are arranged on the inner wall of the concentric-square-shaped groove plate, the opposite faces of the adjacent clamping plates are in a splayed shape, dovetail clamping grooves are formed in the roots of the opposite faces, a horn-shaped balance clamping plate is arranged in a compression opening of the concentric-square-shaped groove plate, and a variable-diameter clamping gap is formed in the middle of the balance clamping plate and matched with the compression opening. A brake rod is arranged at one end, far away from the claw-shaped part, of the balance clamping plate; and a brake cylinder is arranged at the bottom of the brake rod. The device is reasonable in design, high in clamping efficiency, good in positioning effect, capable of fully exposing a welding line, beneficial to improving the welding operation efficiency and suitable for large-scale popularization.

Description

Technical Field

[0001] This invention belongs to the field of welding equipment, and particularly relates to a clamping device for welding irregularly shaped doors and windows. Background Technology

[0002] The standard connection method for aluminum alloy doors and windows is "corner assembly + corner brackets". However, some special types or parts may require welding, such as curved or round non-standard shaped doors and windows. The profiles used to assemble these doors and windows cannot be joined by corner assembly alone, so welding is necessary to achieve the desired shape. This type of door and window is commonly used for decorative doors and windows in hotels and shopping malls. In door and window processing workshops, platforms are typically set up for placing and assembling doors and windows. These platforms are equipped with various clamps for holding and positioning the doors and windows.

[0003] Currently, most clamps for holding and positioning doors and windows are suitable for standard profiles. They are not effective for positioning curved profiles or require more clamps to meet the positioning requirements. Furthermore, more adjustment time is needed during the positioning process, which affects the efficiency of welding operations. In addition, the workpiece is often in a position that is close to the surface of the platform, and the exposed area of ​​the welding line is limited. Usually, at least one flip is required to ensure that the welding line is completely connected, which also increases the number of clamps. Although welding robots are used in the workshop to improve welding efficiency, frequent interruptions and preparation time will also significantly affect the welding efficiency. Summary of the Invention

[0004] This invention addresses the aforementioned technical problems in welding doors and windows by proposing a clamping device for welding irregularly shaped doors and windows that is rationally designed, has high clamping efficiency, good positioning effect, can fully expose the welding line, and is conducive to improving welding operation efficiency.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows: The present invention provides a clamping device for welding irregularly shaped doors and windows, comprising a worktable, on which a clamp is provided. The clamp includes at least four pairs of clamping rollers for engaging with the straight sections of the irregularly shaped doors and windows. Two trays spaced apart are provided on the top of the worktable, and the surface of each tray has a plurality of evenly distributed mounting holes. A clamping fixture connected to the tray by bolts is provided on the tray, and the clamping fixture is used to clamp the arcuate portion of the irregularly shaped doors and windows. The clamping fixture includes a U-shaped groove plate. The inner wall of the U-shaped groove plate is provided with four clamping plates symmetrically distributed in pairs. The opposing faces of adjacent clamping plates are V-shaped and dovetail clamping grooves are provided at the root of the opposing faces. A horizontal compression port is provided on the side of the U-shaped groove plate. A ram's horn-shaped balance clamping plate is provided in the compression port. A variable diameter gap is provided in the middle of the balance clamping plate and it mates with the compression port. A brake rod is provided at the end of the balance clamping plate away from its ram's horn-shaped part. A brake cylinder is provided at the bottom of the brake rod.

[0006] Preferably, the balancing clamp includes a V-shaped middle section, with two ram's horn segments at both ends of the middle section, and the top surfaces of the ram's horn segments and the middle section are provided with a first stepped plane and a second stepped plane.

[0007] Preferably, the longitudinal section of the spiral groove plate is rectangular, and the straight span of the dovetail clamping grooves on adjacent sides of the spiral groove plate is not the same.

[0008] Preferably, a multi-faceted gripping assembly is provided in the middle of the workbench, which is used to cooperate simultaneously with the internal crossbeam and the two side frames of the irregularly shaped door and window.

[0009] Preferably, the multi-faceted hand gripping assembly includes four gripping arms, namely two middle gripping arms and two side gripping arms. Each gripping arm has a vertical positioning roller at one end and a hexagonal prism at the other end. The multi-faceted hand gripping assembly includes a synchronous gearbox that cooperates with the hexagonal prism.

[0010] Preferably, the synchronous gearbox has two meshing main gears in the middle, and two first driven gears, two second driven gears, and two third driven gears that mesh synchronously with the main gears on both sides. The center of each of the main gears, first driven gears, second driven gears, and third driven gears is provided with a rotating shaft, and the end of the rotating shaft is provided with a mortise that mates with a hexagonal prism. The top surface of the mortise is lower than the highest top surface of the synchronous gearbox.

[0011] Preferably, the rotation center lines of the four first driven gears, four second driven gears, and four third driven gears form an elliptical trajectory. The synchronous gearbox includes an elliptical housing and a cover, and the cover is provided with a plurality of shaft holes that mate with the rotating shaft.

[0012] Preferably, the two third driven gears at the same end of the major axis of the ellipse are staggered vertically. The third driven gear is provided with an annular groove that mates with the rotation center of the second driven gear, and the upper third driven gear is provided with a semi-annular hole that mates with the rotation center of the lower third driven gear.

[0013] Preferably, a torsion spring is provided between the main gear and the synchronous gearbox.

[0014] Preferably, the clamp mates with the mounting hole, and a cantilever is provided on the tray for mounting the clamp. The cantilever includes a main board, an L-shaped stop arm is provided on the main board, and a foot post is provided at the bottom of the main board to mate with the mounting hole.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: This invention provides a clamping device for welding irregularly shaped doors and windows. By using a tray, the profile to be welded can be elevated, fully exposing the welding line to the welding robot, which helps reduce the number of clamping operations. Furthermore, the clamping fixture can position the curved part of the irregularly shaped door or window in one go and align it with other profiles, thus improving the efficiency of the welding operation. This invention is reasonably designed, has high clamping efficiency, good positioning effect, can fully expose the welding line, and is conducive to improving the efficiency of welding operations, making it suitable for large-scale promotion. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the following description of the embodiments will be briefly introduced. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A perspective view of a clamping device for welding irregularly shaped doors and windows; Figure 2 This is a working drawing of a clamping device for welding irregularly shaped doors and windows; Figure 3 A cross-sectional view of a clamping device for welding irregularly shaped doors and windows; Figure 4 This is the front view of the clamping fixture; Figure 5 A three-dimensional view of the clamping fixture; Figure 6 A perspective view of the clamping fixture in another direction; Figure 7 Top view of the clamping fixture; Figure 8 A 3D view of the multi-hand gripper assembly; Figure 9 An exploded view of the multi-hand gripper assembly; Figure 10 This is a 3D view of the cantilever. Figure 11 A 3D view of the workbench; In the above figures: 1. Workbench; 2. Fixture; 21. Clamping roller; 3. Pallet; 31. Mounting hole; 4. Clamping tool; 41. U-shaped groove plate; 42. Clamping plate; 43. Dovetail clamping groove; 44. Compression port; 45. Balance clamping plate; 451. Variable diameter gap; 452. Horn section; 453. Intermediate section; 454. First stepped plane; 455. Second stepped plane; 46. Brake lever; 47. Brake cylinder; 5. Multi-hand clamping assembly; 51. Intermediate clamping arm; 52. Side clamping arm; 53. Fixed... 54. Position roller; 55. Hexagonal prism; 56. Synchronous gearbox; 57. Housing; 58. Cover; 59. Shaft eye; 50. Main gear; 51. First driven gear; 52. Second driven gear; 53. Third driven gear; 54. Rotating shaft; 555. Tenon; 556. Annular groove; 557. Semi-annular hole; 558. Torsion spring; 60. Cantilever; 61. Main board; 62. Stop arm; 63. Foot post; 74. Irregular door / window; 75. Arc part; 76. Straight part; 77. Crossbeam; 78. Base frame. Detailed Implementation

[0018] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other. For ease of description, the terms "upper," "lower," "left," and "right" appearing below only indicate that they correspond to the upper, lower, left, and right directions in the accompanying drawings and do not limit the structure.

[0019] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0020] Examples, such as Figures 1-11As shown, the present invention provides a clamping device for welding irregularly shaped doors and windows, including a workbench 1. A clamp 2 is provided on the workbench 1, and the clamp 2 includes at least four pairs of clamping rollers 21 for engaging with the straight sections of the irregularly shaped doors and windows 7. The main body of the workbench 1 is a frame structure welded from structural steel. A whole plate can be directly laid on the top surface of the workbench 1 as a tabletop, or a plastic material with snap-fit ​​grooves can be used to engage with the hollow structure. The top surface of this plastic material is flat and directly serves as the tabletop. The hollow center of the workbench 1 is used to install a multi-hand clamping assembly 5 and for wiring. The clamping rollers 21 engage in pairs, and the roller gap can be adjusted according to the side frame dimensions of the irregularly shaped doors and windows 7 to clamp the straight sections 72 of the irregular door frame. Based on this, the present invention provides a clamping fixture 4 and a multi-hand clamping assembly 5 to improve welding efficiency, addressing the processing requirements of the most common types of irregularly shaped doors and windows in welding workshops.

[0021] Specifically, the workbench 1 provided by the present invention has two trays 3 arranged at intervals on the top. The surface of the trays 3 is provided with a number of evenly distributed mounting holes 31. The trays 3 are provided with clamping fixtures 4 connected to them by bolts. The clamping fixtures 4 are used to clamp the arc part 71 of the irregular door and window 7. The clamping fixtures 4 include a U-shaped groove plate 41. The inner wall of the U-shaped groove plate 41 is provided with four clamping plates 42 arranged symmetrically in pairs. The opposite faces of the adjacent clamping plates 42 are V-shaped and dovetail clamping grooves 43 are provided at the root of the opposite faces. The side of the U-shaped groove plate 41 is provided with a horizontal compression port 44. The compression port 44 is provided with a ram's horn-shaped balance clamping plate 45. The middle of the balance clamping plate 45 is provided with a variable diameter gap 451 and cooperates with the compression port 44. The balance clamping plate 45 is provided with a brake rod 46 at the end away from its ram's horn-shaped part. The bottom of the brake rod 46 is provided with a brake cylinder 47.

[0022] More specifically, the mounting holes 31 on the surface of the tray 3 provide several effective connection points for the clamping rollers 21, so that the clamping rollers 21 can be paired to form an effective guiding and clamping distance, providing guidance and clamping for the side frame of the irregular door and window 7; the four pairs of clamping rollers 21 are divided into two rows on the tray 3, and each row corresponds to a straight part 72, i.e., the side frame, so the two rows of clamping rollers 21 can make the two side frames have the required parallel assembly distance. Furthermore, the bottom support block of the tray 3 can effectively raise the profile to be welded, raising the actual height of the welding line to be welded and fully exposing it to the welding robot. The raised gap allows the welding robot to change the welding angle to weld a continuous welding line, which can reduce the number of flips and necessary clamping times.

[0023] For the curved portion of the irregularly shaped door / window 7, i.e., the arc frame, it can be lowered from the middle position of the U-shaped groove plate 41 into the dovetail clamping grooves 43 on both sides. The straight-line distance between the two dovetail clamping grooves 43 is less than the diameter of the arc frame, so there is at least one chord line of the arc frame between the two dovetail clamping grooves 43 that mate with the arc frame. The brake cylinder 47 controls the translation of the brake rod 46 through its extension and retraction action. The brake rod 46 drives the balance clamp plate 45 to translate, and the variable diameter gap 451 located in the compression port 44 becomes smaller and obtains a certain... The ram's horn-shaped end of the balance clamp 45 and the outer side of the arc frame have two symmetrical thrust points, which are also clamping points. They can push the arc frame from the outside of the arc frame to the end of the side frame until the relative position relationship between the arc frame and the dovetail clamping groove 43 no longer changes, and the welding position of the arc frame and the side frame is aligned. This can achieve one-time positioning without the need for a large number of cumbersome clamping parts, which is conducive to improving the efficiency of rapid clamping and can meet the requirements of welding operation for the reliability of profile clamping.

[0024] Furthermore, the root diameter of the dovetail clamping groove 43 is larger than the width of the arc frame, leaving a certain translational allowance for the arc frame, thereby meeting the clamping requirements of arc frames of various sizes. For the two clamping plates 42 in operation, their outward V-shaped surfaces can guide the arc frame being picked up and placed, especially during the process of lowering the arc frame, which plays a certain role in correcting the posture of the arc frame, allowing it to effectively fall within the clamping range of the dovetail clamping groove 43 and the balancing clamping plate 45.

[0025] In order to improve the clamping performance of the clamping fixture 4 for the arc frame, the balance clamping plate 45 provided by the present invention includes a V-shaped middle section 451, and two ram's horn sections 452 are provided at both ends of the middle section 451. The top surfaces of the ram's horn sections 452 and the middle section 451 are provided with a first stepped plane 454 and a second stepped plane 455. The V-shaped surface of the middle section 451 forms a variable-diameter gap 451, and forms two sets of line contact pairs with the edge of the compression port 44 to ensure the uniformity of force during the narrowing process of the variable-diameter gap 451. A circular arc transition surface is provided in the middle of the middle section 451, which cooperates with the cylindrical side of the brake lever 46 to provide structural support for the uniform movement of the balance plate 45. The top of the brake lever 46 is provided with an end plate to prevent end jumps in the balance plate 45. The cross-section of the end plate is larger than the area of ​​the rod end of the brake lever 46. The bottom of the brake lever 46 extends downwards and is connected to the brake cylinder 47 located below the tray 3. The first stepped plane 454 on the horn section 452 supports the arc frame and is formed by the first stepped... The root of plane 454 forms a thrust node from the outside to the inside with the arc frame. At the same time, the end of the ram's horn segment 452 also contacts the outside of the arc frame and is intersected with the root of the first step surface, thus forming at least two pairs of effective thrust pairs. This helps to improve the uniformity of the thrust applied by the balance clamp 45 to the arc frame, improve the stability of the arc frame translation, and reduce the need for manual fine-tuning intervention during the centering process. The height of the second step plane 455 is higher than the highest surface of the compression port 44. Its root serves as the limit point for the translation of the balance clamp 45, which helps to improve the stability of the balance clamp 45 after reaching the limit node, ensures the reliability of its clamping of the arc frame, and avoids excessive movement that could lead to obvious interlacing of the welding lines and affect the welding quality.

[0026] To improve the utilization rate of the clamping fixture 4, the longitudinal section of the spiral groove plate 41 provided by this invention is rectangular, and the straight-line span of the dovetail clamping grooves 43 on adjacent sides of the spiral groove plate 41 is different. By changing the horizontal and vertical orientation of the spiral groove plate 41, dovetail clamping grooves 43 with different spans can fall into the working surface to obtain different clamping spans. Without changing the angle, the inner surface of the clamping plate 42 located below the spiral groove plate 41 can also position smaller arc frames. Therefore, the clamping fixture 4 has at least 4 pairs of clamping positions that can be used for clamping, and each position can be used for at least one size of arc frame. The overall utilization rate is high and the practicality is strong.

[0027] To improve the assembly and welding quality of the irregularly shaped door and window 7, the workbench 1 provided by this invention is equipped with a multi-faceted gripper assembly 5 in the middle. The multi-faceted gripper assembly 5 is used to simultaneously cooperate with the internal crossbeam 73 and the two side frames of the irregularly shaped door and window 7. By gripping and positioning the basic components of the irregularly shaped door frame through the multi-faceted gripper assembly 5, different parts can be assembled into a basic frame that meets the requirements, especially ensuring that the welding line is aligned in place, the quality is controllable, and the efficiency of continuous operation of the welding robot is improved, thereby improving the welding efficiency.

[0028] To improve the clamping performance of the multi-hand gripping assembly 5 on irregular door frames, the multi-hand gripping assembly 5 provided by the present invention includes four gripping arms, namely two middle gripping arms 51 and two side gripping arms 52. One end of each gripping arm is provided with a vertical positioning roller 53. The gripping arm has a certain horizontal margin near the positioning roller 53 to support the crossbeam 73 and the side frame, so that the different structural components of the irregular door and window 7 are kept at a uniform level. The other end of each gripping arm is provided with a hexagonal prism 54. The multi-hand gripping assembly 5 includes a synchronous gearbox 55 that cooperates with the hexagonal prism 54. The synchronous gearbox 55 synchronizes the clamping actions of the four clamping arms. The clamping openings of the four clamping arms in their original positions are relatively small. By rotating one clamping arm, the other three clamping arms can be opened. After the side frame and crossbeam 73 are placed at the end of the clamping arm, the clamping arm is released, and the clamping arm automatically tightens / pushes the side frame and crossbeam 73 to the corresponding position. Since the welding positions of the crossbeam 73, side frame and arc frame generally adopt the tenon and mortise structure of frog shoulder, the arc frame can be centered to the corresponding position by the clamping fixture 4, which is conducive to the efficient welding operation of the welding robot.

[0029] To improve the utilization rate of the synchronous gearbox 55, the synchronous gearbox 55 provided by the present invention has two meshing main gears 554 in the middle, and two first driven gears 555, two second driven gears 556, and two third driven gears 557 that mesh synchronously with the main gears 554 on both sides. A rotating shaft 558 is provided at the center of each of the main gears 554, the first driven gears 555, the second driven gears 556, and the third driven gears 557. The end of the rotating shaft 558 is provided with a mortise 559 that mates with the hexagonal prism 54. The top surface of the mortise 559 is lower than the highest top surface of the synchronous gearbox 55. Among them, one of the two main gears 554 is the driving gear and the other is the driven gear. The diameter of the two main gears 554 is larger than the diameter of the first driven gear 555 and the second driven gear 556, with the primary consideration being to ensure that the clamping arm has sufficient horizontal span and swing margin. The diameter of the gears is selected and designed according to the proximity of the gear meshing, such as the first driven gear 555 having the smallest diameter, the second driven gear 556 having a medium diameter, and the third driven gear 557 having the largest diameter. From a spatial planning perspective, the first driven gear 555, the second driven gear 556, and the third driven gear 557 are... The three driven gears 557 are staggered vertically and directly mesh with the transmission side of the main gear 554. In this way, the clamping arms can be connected to the first driven gear 555, the second driven gear 556, and the third driven gear 557 respectively to obtain different maximum clamping spans. Furthermore, the rotation direction of the same pair of clamping arms can be smoothly reversed through the transmission of the two main gears 554, with one clamping arm rotating clockwise and the other counterclockwise. The rotation amplitude of the same pair of clamping arms is consistent, while the rotation amplitude of the other pair of clamping arms is controlled by the transmission ratio between the main gear 554 and the corresponding driven gear. This invention provides a synchronous gearbox 55 where the swing of one clamping arm can control the swing of the other clamping arms. Synchronous clamping action helps improve the alignment quality of the crossbeam 73, the side frame, and the arc frame, reduces manual intervention, and provides appropriate manual assistance and fine-tuning. The actual clamping operation is reduced, thus improving production efficiency.

[0030] Furthermore, the rotation center lines connecting the four first driven gears 555, four second driven gears 556, and four third driven gears 557 provided by the present invention form an elliptical trajectory. Correspondingly, the synchronous gearbox 55 includes an elliptical housing 551 and a cover 552. The inner bottom of the housing 551 is provided with a shaft hole that mates with the rotating shaft 558. The cover 552 is provided with multiple shaft eyes 553 that mate with the rotating shaft 558. The shaft holes and shaft eyes 553 can be oiled or fitted with smooth-finished bearings to improve the rotational balance of the rotating shaft 558. By arranging all the driven gears in an elliptical trajectory, different center distances of clamping spans can be obtained by connecting to different driven gears while keeping the length of the same clamping arm constant. This adapts to the synchronous clamping requirements of the side frame and the crossbeam 73. Moreover, different pairs of clamping arms avoid necessary welding positions, which is beneficial for the entire welding process of the welding robot. In addition, the overall space utilization is high, and it is also convenient to install in the middle position of the worktable 1.

[0031] Because the center distance between the third driven gear 557 and the main gear 554 is relatively large, the third driven gear 557 in the same area has a certain overlapping area. In order to improve the spatial compactness of the synchronous gearbox 55 and the rotation performance of the driven gear, the two third driven gears 557 at the same end of the elliptical long shaft are staggered vertically. The third driven gear 557 is provided with an annular groove 5510 that mates with the rotation center of the second driven gear 556. The upper third driven gear 557 is provided with a semi-annular hole 5511 that mates with the rotation center of the lower third driven gear 557. Among them, the third driven gear 557, located at the upper position of the staggered arrangement, has an annular groove 5510 on its surface that can be supported and engaged with the bottom end of the shaft of the second driven gear 556. The other second driven gear 556 avoids the third driven gear 557. The annular groove 5510 provides a relative rotation path for the second driven gear 556 to improve the rotational balance of the second driven gear 556 and reduce the vertical clearance between the second driven gear 556 and the third driven gear 557. The third driven gear 557, located at the lower position of the staggered arrangement, has an annular groove 5510 on its surface that can be engaged with the bottom end of the shaft of the upper third driven gear 557. The central rotating shaft 558 passes through the semi-annular hole 5511 on the upper third driven gear 557 from bottom to top, thereby extending to the position of the axle eye 553, providing structural support for its transmission connection with the hexagonal prism 54. All the driven gears provided by the present invention can establish a transmission relationship with the hexagonal prism 54 through the mortise 559, and the shaft end of the driven gear that does not participate in the rotation of the clamping arm is hidden inside the mortise 553, and does not interfere with the actual swing of the clamping arm.

[0032] To improve the clamping quality of the multi-hand gripper assembly 5, a torsion spring 5512 is provided between the main gear 554 and the synchronous gearbox 55. One end of the torsion spring 5512 is connected to the main gear 554, and the other end is connected to the synchronous gearbox 55. The torsion spring 5512 provides a restoring force to the gear set in the synchronous gearbox 55. This restoring force acts as a clamping force during the clamping operation, which helps improve the clamping performance of the multi-hand gripper assembly 5 on irregularly shaped door frame components. The rotating shaft 558 of the main gear 554 in the multi-hand gripper assembly 5 can also be driven by a stepper motor. Using a motorized method can appropriately improve the automation level of this equipment.

[0033] To improve welding efficiency, the fixture 2 provided by this invention cooperates with the mounting hole 31. A cantilever 6 is provided on the tray 3 for mounting the fixture 2. The cantilever 6 includes a main board 61, an L-shaped stop arm 62 on the main board 61, and a foot post 63 at the bottom of the main board 61 that cooperates with the mounting hole 31. The foot post 63 of the cantilever 6 and the tray 3 can be quickly assembled and disassembled. The tight fit can ensure the stability during the support of the bottom frame 74 of the irregular door frame. The stop arm 62 acts as a one-way brake, which, in conjunction with the braking action of the clamping fixture 4 in the other direction, can ensure the automatic centering quality of the basic frame of the irregular door frame, especially the quality of the welding line. For some styles of irregular door frames, the bottom frame 74 can be pre-connected to the side frame as a whole by corner brackets / group brackets, and then installed on this equipment for welding processing of the irregular position. Regardless of the position of the arc frame or the position of the bottom frame 74, the position to be welded is in a suspended state, which is beneficial for the welding robot to perform welding operations.

[0034] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A clamping device for welding irregularly shaped doors and windows, comprising a worktable, wherein a clamp is provided on the worktable, the clamp comprising at least four pairs of clamping rollers for engaging with the straight sections of the irregularly shaped doors and windows, characterized in that, The top of the workbench is provided with two trays spaced back to back. The surface of each tray is provided with several evenly distributed mounting holes. Each tray is provided with a clamping fixture connected to it by bolts. The clamping fixture is used to clamp the arc part of irregularly shaped doors and windows. The clamping fixture includes a U-shaped groove plate. The inner wall of the U-shaped groove plate is provided with four clamping plates symmetrically distributed in pairs. The opposite faces of adjacent clamping plates are V-shaped and dovetail clamping grooves are provided at the root of the opposite faces. The side of the U-shaped groove plate is provided with a horizontal compression port. A ram's horn-shaped balancing clamping plate is provided in the compression port. The middle of the balancing clamping plate is provided with a variable diameter gap that mates with the compression port. A brake rod is provided at the end of the balancing clamping plate away from its ram's horn-shaped part. A brake cylinder is provided at the bottom of the brake rod.

2. The clamping device for welding irregularly shaped doors and windows according to claim 1, characterized in that, The balancing clamp includes a V-shaped middle section, with two ram's horn segments at both ends of the middle section. The top surfaces of the ram's horn segments and the middle section are provided with a first stepped plane and a second stepped plane.

3. A clamping device for welding irregularly shaped doors and windows according to claim 2, characterized in that, The longitudinal section of the spiral groove plate is rectangular, and the straight spans of the dovetail clamping grooves on adjacent sides of the spiral groove plate are not the same.

4. A clamping device for welding irregularly shaped doors and windows according to claim 1 or 3, characterized in that, The workbench is equipped with a multi-faceted gripping assembly in the middle, which is used to simultaneously cooperate with the internal crossbeams and side frames of irregularly shaped doors and windows.

5. A clamping device for welding irregularly shaped doors and windows according to claim 4, characterized in that, The multi-faceted hand gripping assembly includes four gripping arms, namely two middle gripping arms and two side gripping arms. Each gripping arm has a vertical positioning roller at one end and a hexagonal prism at the other end. The multi-faceted hand gripping assembly includes a synchronous gearbox that cooperates with the hexagonal prism.

6. A clamping device for welding irregularly shaped doors and windows according to claim 5, characterized in that, The synchronous gearbox has two meshing main gears in the middle. On both sides of the main gears are two first driven gears, two second driven gears, and two third driven gears that mesh synchronously with them. The center of each of the main gears, first driven gears, second driven gears, and third driven gears is provided with a rotating shaft. The end of each rotating shaft is provided with a mortise that mates with a hexagonal prism. The top surface of the mortise is lower than the highest top surface of the synchronous gearbox.

7. A clamping device for welding irregularly shaped doors and windows according to claim 6, characterized in that, The rotational centers of the four first driven gears, four second driven gears, and four third driven gears form an elliptical trajectory. The synchronous gearbox includes an elliptical housing and a housing cover, and the housing cover is provided with multiple shaft holes that mate with the rotating shaft.

8. A clamping device for welding irregularly shaped doors and windows according to claim 7, characterized in that, The two third driven gears at the same end of the major axis of the ellipse are staggered vertically. The third driven gear is provided with an annular groove that mates with the rotation center of the second driven gear, and the upper third driven gear is provided with a semi-annular hole that mates with the rotation center of the lower third driven gear.

9. A clamping device for welding irregularly shaped doors and windows according to claim 6 or 8, characterized in that, A torsion spring is provided between the main gear and the synchronous gearbox.

10. A clamping device for welding irregularly shaped doors and windows according to claim 1, characterized in that, The clamp engages with the mounting hole, and a cantilever is provided on the tray for mounting the clamp. The cantilever includes a main board, an L-shaped stop arm is provided on the main board, and a foot post is provided at the bottom of the main board to engage with the mounting hole.

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