A welding device for arc-shaped parts and its welding process

Abstract

This application discloses a welding device and welding process for arc-shaped parts, relating to the field of welding devices. It includes a worktable, a support frame fixed to the side wall of the worktable, two push rods movably connected to the side wall of the support frame, the two push rods being parallel to each other and having push blocks fixed to their ends. Clamping guide surfaces for holding are formed on the opposite side walls of the push blocks, and push grooves are formed on the push blocks. A plurality of stabilizing turntables are rotatably connected to the inner side wall of the push grooves, and suction cups are fixed to the side walls of the stabilizing turntables. A welding torch head for welding is fixed on the worktable. This application has the effect of improving the welding quality of arc-shaped parts.

Description

Technical Field

[0001] This application relates to the field of welding equipment, and in particular to a welding equipment for arc-shaped parts and its welding process. Background Technology

[0002] Curved components include thermos cups, which are generally designed with two layers, inner and outer, to keep the water or other liquids inside warm.

[0003] Patent CN114833447A discloses a multi-purpose welding device for double-layer stainless steel thermos cups, belonging to the technical field of thermos cup processing equipment. It solves the problem of limited applicability of existing thermos cup welding devices. This multi-purpose welding device includes a frame, a lifting drive device fixedly mounted on the frame, a lifting platform fixedly mounted at the output end of the lifting drive device, a drive shaft rotatably mounted on the lifting platform, a main shaft drive device fixedly mounted on the lifting platform for driving the drive shaft, a clamping device at the end of the drive shaft, a laser welding head mounted on the frame, and outer shell limiting components and inner liner limiting components. Compared with existing technologies, this multi-purpose welding device can achieve multiple uses, not only for welding straight-mouthed outer shells and straight-mouthed inner liners, but also for automatically overlapping the inner liner with the outer shell before welding, and can even be used for welding small round pieces with rounded bottoms.

[0004] In the process of realizing the above application, the inventors discovered that the technology has at least the following problems: after the bottom of the thermos cup is welded to the outer shell, the bottom of the outer shell will shrink inward and the shrinkage will be uneven, which will affect the fit between the bottom of the outer shell and the steel bottom, resulting in a high defect rate of the welded steel bottom; after the bottom of the thermos cup is welded to the cup body, the bottom of the cup will shrink inward to form a short bevel, and the original arc size of the steel bottom is inconsistent, resulting in poor fit at the joint with the cup body after the bottom shrinks, with grooves. Under such circumstances, welding will form a false weld, resulting in a high defect rate of sand weld, and multiple polishing and rework will cause the polishing material of the cup body to become thin, resulting in scrap. Summary of the Invention

[0005] To improve the welding quality of arc-shaped parts, this application provides an arc-shaped part welding device and its welding process.

[0006] Firstly, the arc-shaped component welding device provided in this application adopts the following technical solution:

[0007] A welding device for arc-shaped parts includes a worktable, a support frame fixed to the side wall of the worktable, two push rods movably connected to the side wall of the support frame, the two push rods being parallel to each other and push blocks fixed at their ends, clamping guide surfaces for clamping being provided on the opposite side walls of the push blocks, push grooves being provided on the push blocks, a plurality of stabilizing turntables being rotatably connected to the inner side wall of the push grooves, suction cups being fixed to the side walls of the stabilizing turntables, and a welding gun head for welding being fixed on the worktable.

[0008] By adopting the above technical solution, after the arc-shaped component is clamped, the side wall of the stabilizing turntable contacts the side wall of the arc-shaped component. Since the side wall of the stabilizing turntable is fixed with a suction cup, the suction cup has an adsorption effect on the arc-shaped component, which enhances the stability of clamping the arc-shaped component. At the same time, when the welding stress causes the weld to bend, by rotating the arc-shaped component, the bending position at the weld is pulled and restored to its original position under the action of the suction cup, which reduces the defect rate of the welded product and improves the welding quality.

[0009] Optionally, the support frame is provided with a driving assembly to facilitate the movement of the push rod. The driving assembly includes two sliding frames fixed to the side wall of the support frame. An adjustment frame is slidably connected to the sliding frame. The adjustment frame is arranged in a "V" shape, with one side wall of the adjustment frame slidably connected to the sliding frame and an adjustment groove opened on the other side wall. The push rod is rotatably connected to the inner side wall of the adjustment groove. A reset rod is fixed to the end of the push rod. A reset spring for pulling the reset rod is provided between the reset rod and the inner side wall of the adjustment groove.

[0010] By adopting the above technical solution, the adjustment frame slides and drives the push rod to slide. At the same time, the push block clamps the workpiece to be welded. The adjustment frame continues to move. Under the action of the return spring, the clamping force of the push block increases, which improves the stability of the clamping process. Meanwhile, the return spring facilitates the push rod to return to its original position after clamping is completed.

[0011] Optionally, a limiting rod for limiting the position of the push rod is fixed to the inner side wall of the adjustment groove, a driving rod is rotatably connected to the corner of the adjustment frame, a driving electric cylinder is fixed on the support frame, and the driving rod is rotatably connected to the piston rod of the driving electric cylinder.

[0012] By adopting the above technical solution, the limiting rod is used to limit the position of the push rod, reducing the possibility that the workpiece to be welded may not be able to be clamped due to excessive offset angle of the push rod. At the same time, it drives the electric cylinder to start and drive the rod to move, which in turn drives the adjusting frame to move, facilitating the clamping process.

[0013] Optionally, a positioning disk is rotatably connected to the worktable, the axis of the positioning disk being the same as the axis of the workpiece after it is clamped. A fixing frame is fixed to the worktable, and a driving plate is rotatably connected to the bottom of the fixing frame. The driving plate is coaxially arranged with the positioning disk, and a clamping cylinder is fixed to the bottom of the driving plate. Several clamping grooves are opened on the side wall of the clamping cylinder, and a clamping rod is rotatably connected to the inner side wall of the clamping groove. The clamping rod is T-shaped and operates in a lever form. The first fixing rod passes through both the driving plate and the clamping cylinder. A positioning component for further positioning the workpiece to be welded is provided on the worktable.

[0014] By adopting the above technical solution, during the clamping process, the driving plate abuts against the top of the workpiece to be welded, the clamping rod is placed inside the workpiece to be welded, and the rotation of the clamping rod causes the side wall of the clamping rod to abut against the inner side wall of the workpiece to be welded, thereby clamping the workpiece to be welded between the clamping rod and the driving plate. The rotation of the driving plate can drive the workpiece to be welded to rotate, which makes it easy to control the rotation of the workpiece to be welded.

[0015] Optionally, the clamping cylinder is provided with a motion component for driving the clamping rod to move. The motion component includes a control cylinder slidably connected to the inner side wall of the clamping cylinder. The side wall of the control cylinder has a control groove. The clamping rod passes through the control groove. The clamping cylinder is provided with a control spring for pushing the control cylinder to move. The side wall of the clamping cylinder has an operation groove. An operation rod passes through the operation groove and is fixed to the side wall of the control cylinder.

[0016] By adopting the above technical solution, the operating rod slides and drives the control cylinder to slide. During the sliding process, the inner wall of the control groove pushes the clamping rod to rotate and fixes the position of the clamping rod, so that the clamping rod can hold the inner wall of the workpiece to be welded.

[0017] Optionally, the operating lever is "L" shaped, with one side wall of the operating lever parallel to the drive plate and the other side wall slidably connected to the end face of the drive plate.

[0018] By adopting the above technical solution, the operating lever extends to the end face of the drive plate, which facilitates the control of the movement of the control cylinder.

[0019] Optionally, the worktable is provided with a plurality of locking holes, a first locking rod is slidably connected in the locking holes, a second locking rod is rotatably connected to the end face of the first locking rod opposite the positioning plate, a locking platform for positioning the workpiece to be welded is rotatably connected to the end of the second locking rod, a supporting rod is fixed to the side wall of the locking platform and the supporting rod passes through the first locking rod, and a supporting spring is provided on the side wall of the supporting rod to push the locking platform to slide in a direction away from the first locking rod.

[0020] By adopting the above scheme, the lifting motor starts and drives the lifting plate to slide. During the process of the lifting plate rising, under the action of the holding spring, the positioning table moves towards the workpiece to be welded and contacts the side wall of the workpiece to be welded, so as to further position the workpiece to be welded.

[0021] Secondly, this application also discloses a welding process applicable to the above-mentioned arc-shaped component welding device, comprising the following steps:

[0022] 1. Place the workpiece on the worktable;

[0023] 2. Start the electric cylinder, which drives the push block to move and clamp the workpiece. The push block then transfers the workpiece onto the positioning plate.

[0024] 3. The first locking rod slides, causing the second locking rod to abut against the outside of the workpiece;

[0025] 5. Start the welding torch and spot weld the weld seam to fix it;

[0026] 6. The rotating plate rotates the workpiece, and the welding gun head performs continuous welding until the welding is completed.

[0027] By adopting the above scheme, the workpiece to be welded is first clamped and then fixed by spot welding. During the rotation of the workpiece, the weld depression is restored to its original position by the suction cup, which facilitates the welding process.

[0028] In summary, this application includes at least one of the following beneficial technical effects:

[0029] 1. This equipment is suitable for welding most arc-shaped cup structures. After passing the spot welding fixing rod, the arc-shaped part is rotated. Under the action of the suction cup, the curved position at the weld is pulled and restored to its original position, which reduces the defect rate of the welded product and improves the welding quality.

[0030] 2. A rolling ball is provided at the end of the second fixing rod, so that the interference of the end of the second fixing rod to the workpiece to be welded is small during the rotation of the workpiece. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the main structure of an embodiment of this application.

[0032] Figure 2 This is a schematic diagram of the drive component structure.

[0033] Figure 3 yes Figure 2 Enlarged view of section A in the middle.

[0034] Figure 4 yes Figure 2 Enlarged view of section B.

[0035] Figure 5 This is a schematic diagram of the first and second locking rods.

[0036] Figure 6 This is a schematic diagram of the working state of the first and second locking rods.

[0037] Figure 7 This is a sectional view showing the installation method and location of the clamp rod.

[0038] Explanation of reference numerals in the attached figures:

[0039] 1. Workbench; 2. Support frame; 3. Push rod; 4. Push block; 5. Clamping guide surface; 6. Push groove; 7. Stabilizing turntable; 8. Suction cup; 9. Welding gun head; 10. Sliding frame; 11. Adjusting frame; 12. Adjusting groove; 13. Reset rod; 14. Reset spring; 15. Limit rod; 16. Drive rod; 17. Drive cylinder; 18. Positioning plate; 19. Fixing frame; 26. Drive plate; 27. Clamping cylinder; 28. Clamping groove; 29. ​​Clamping rod; 30. Control cylinder; 31. Control groove; 32. Control spring; 35. 36. Disassembly slot; 37. Disassembly rod; 38. Locking rod; 39. Positioning hole; 40. Positioning rod; 41. Obstruction ring; 42. Workpiece to be welded; 43. Support platform; 44. Locking hole; 45. First locking rod; 46. Locking platform; 47. First locking slot; 48. Holding rod; 49. Holding plate; 50. Obstruction plate; 51. Holding spring; 52. Lifting plate; 53. Support rod; 54. Lifting frame; 55. Lifting motor; 56. Cam; 57. Adjusting plate; 58. Adjusting rod; 59. Adjusting disc. Detailed Implementation

[0040] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0041] Firstly, embodiments of this application disclose a welding apparatus for arc-shaped components. (Refer to...) Figure 1 and Figure 2 A welding device for arc-shaped parts includes a workbench 1, which is set on the ground and used to support the workpiece 41 to be welded; a welding gun head 9 is fixed on the workbench 1 by bolts, and the welding gun head 9 is used to perform laser welding on the workpiece 41 to be welded; a support frame 2 is integrally formed on the side wall of the support platform, and two push rods 3 are connected to the side wall of the support frame 2 opposite to the workbench 1. The two push rods 3 are parallel to each other in the length direction, and the end of the push rod 3 away from the support frame 2 is integrally formed with a push block 4. Clamping guide surfaces 5 are opened on the opposite side walls of the two push blocks 4. The clamping guide surfaces 5 are "V" shaped, and the clamping guide surfaces 5 facilitate the clamping of the arc-shaped workpiece 41 to be welded.

[0042] Reference Figure 1 and Figure 2The support frame 2 is equipped with a driving component, which facilitates the movement of the push rod 3, thereby enabling the push block 4 to clamp the arc-shaped workpiece 41 to be welded. The driving component includes two sliding frames 10, which are integrally formed on the side wall of the support frame 2. The sliding frames 10 have sliding holes, which are rectangular in shape. An adjustment frame 11 passes through the sliding hole and is slidably connected to the inner side wall of the sliding hole. The adjustment frame 11 is used to connect with the push rod 3 to facilitate clamping the workpiece 41 to be welded. The adjustment frame 11 is "V" shaped. One side wall of the adjustment frame 11 is slidably connected to the inner side wall of the sliding hole, and an adjustment groove 12 is provided on the other side wall. The push rod 3 is rotatably connected to the inner side wall of the adjustment groove 12 through a rotating shaft.

[0043] Reference Figure 1 and Figure 2 The push rod 3 has a reset rod 13 integrally formed at its end, and a snap-fit ​​rod is integrally formed on the inner wall of the adjustment groove 12. A reset spring 14 is provided between the reset rod 13 and the inner wall of the adjustment groove 12. One end of the reset spring 14 is snapped onto the side wall of the reset rod 13, and the other end is snapped onto the side wall of the snap-fit ​​rod. The reset spring 14 is used to pull the reset rod 13 to reset, thereby pulling the push rod 3 to reset. A limit rod 15 is integrally formed on the inner wall of the adjustment groove 12. The limit rod 15 is used to limit the position of the push rod 3 and reduce the possibility of the push rod 3 shifting position under the action of the reset spring 14. At the corner of the adjustment frame 11 A drive rod 16 is rotatably connected via a rotating shaft. The drive rod 16 drives the adjustment frame 11 to move. A drive cylinder 17 is fixed to the support frame 2 by bolts. At the same time, the two drive rods 16 are rotatably connected to the piston rod of the drive cylinder 17 via a rotating shaft. When the drive cylinder 17 is activated, the piston rod of the drive cylinder 17 drives the drive rod 16 to move, thereby causing the adjustment frame 11 to slide in the sliding hole. The adjustment frame 11 drives the push rod 3 and the push block 4 to move, clamping the arc-shaped workpiece 41 to be welded. Under the action of the return spring 14, the pre-tightening force of the clamping is enhanced, reducing the possibility of clamping instability.

[0044] Reference Figure 2 , Figure 3 and Figure 4The pushing block 4 has a pushing groove 6 that passes through it horizontally. Several stabilizing turntables 7 are detachably connected to the inner wall of the pushing groove 6. In this embodiment, four stabilizing turntables 7 are used, and they are evenly distributed along the length of the inner wall of the pushing groove 6. The stabilizing turntables 7 are rotatably connected to the inner wall of the pushing groove 6. Several suction cups 8 are adhered to the outer wall of the stabilizing turntables 7. A disassembly groove 35 is provided on the inner wall of the pushing groove 6 for the shaft of the stabilizing turntable 7 to pass through. A disassembly rod 36 for limiting the position of the stabilizing turntable 7 is slidably connected within the disassembly groove 35. The end of the pushing block 4 away from the clamping guide surface 5 is rotatably connected to a disassembly rod. 36 is fixed in the disassembly groove 35 with a locking rod 37; after the arc-shaped workpiece 41 to be welded is fixed in position, the suction cup 8 is adsorbed at the weld. During the welding process, the weld needs to be spot welded first, which may cause the weld to shrink due to heat and become concave inward. After the spot welding is completed, the workpiece 41 to be welded is rotated, and the suction cup 8 can stretch outward, so that the concave area returns to its original shape. The worktable 1 is rotatably connected to the positioning plate 18 through a rotating shaft. The axis of the positioning plate 18 is the same as the axis of the workpiece after it is clamped. At the same time, the diameter of the positioning plate 18 is the same as the diameter of the workpiece 41 to be welded, that is, the workpiece is coaxial with the positioning plate 18 after it is clamped.

[0045] Reference Figure 1 An adjusting plate 57 is fixed to the upper surface of the workbench 1 by bolts. An adjusting rod 58 is slidably connected to the upper surface of the adjusting plate 57. An adjusting motor for driving the adjusting rod 58 to slide is fixed to the end of the adjusting plate 57 by bolts. The sliding direction of the adjusting rod 58 is parallel to the movement direction of the workpiece 41 to be welded. An adjusting disc 59 is rotatably connected to the end of the adjusting plate 57 opposite to the positioning disc 18 by a rotating shaft. The adjusting disc 59 is used to limit the position of the workpiece 41 to be welded and will not interfere with the rotation of the workpiece 41 to be welded.

[0046] Reference Figure 1 , Figure 5 and Figure 6A positioning assembly is provided on the workbench 1. The positioning assembly is used to further position the workpiece 41 to be welded. The positioning assembly includes a support platform 42 fixed to the bottom of the workbench 1 by bolts. The support platform 42 is hollow and has three locking holes 43. The three locking holes 43 are evenly distributed around the axis of the positioning disk 18. The locking holes 43 pass through the workbench 1 along the axis of the positioning disk 18. A first locking rod 44 is slidably connected in the locking holes 43. The first locking rod 44 is vertically set. The side wall of the first locking rod 44 opposite to the axis of the positioning disk 18 is rotatably connected to a second locking rod 45 through a rotating shaft. The end of the second locking rod 45 is rotatably connected to a second locking rod 45 through a rotating shaft. A positioning platform 46 is provided, which is arc-shaped and matches the curvature of the outer wall of the workpiece 41 to be welded. A first positioning groove 47 is formed on the side wall of the first positioning rod 44, and the length direction of the first positioning groove 47 is parallel to the length direction of the first positioning rod 44. A retaining rod 48 is integrally formed on the positioning platform 46 opposite to the end face of the first positioning rod 44. The retaining rod 48 is horizontally set and passes through the first positioning groove 47. The retaining rod 48 can slide along the length direction of the first positioning groove 47. A retaining plate 49 is slidably connected to the inner wall of the first positioning groove 47. The retaining rod 48 is coaxially set and slidably connected to the retaining plate 49. On the end face of the holding plate 49, an obstruction plate 50 is integrally formed at the end of the holding rod 48 away from the locking platform 46. A holding spring 51 is provided on the side wall of the holding rod 48. One end of the holding spring 51 is bonded to the end face of the obstruction plate 50, and the other end is bonded to the end face of the holding plate 49. The holding spring 51 is used to pull the obstruction plate 50 toward the holding plate 49, thereby causing the locking platform 46 to slide away from the first locking rod 44. A lifting plate 52 is integrally formed at the bottom of the first locking rod 44. The lifting plate simultaneously fixes the positions of the three first locking rods 44. A support rod 53 is integrally formed on the inner side wall of the support platform 42. The support rod 53 supports the lifting plate. A lifting frame 54 is bolted to the bottom side, and a lifting motor 55 is bolted to the top of the lifting frame 54. A cam 56 is keyed to the shaft of the lifting motor 55. The side wall of the cam 56 abuts against the bottom of the lifting plate. When the lifting motor 55 starts, it drives the lifting plate to slide. During the lifting process, under the action of the holding spring 51, the positioning table 46 moves toward the workpiece 41 to be welded and contacts the side wall of the workpiece 41 to be welded, further positioning the workpiece 41. Then, under the action of the cam 56, it returns to its original position. At the same time, a holding groove for placing the holding rod 48 is opened on the upper surface of the worktable 1. The holding rod 48 is placed in the holding groove and does not affect the welding process.

[0047] Reference Figure 1 and Figure 7A fixed frame 19 is bolted to the upper surface of the workbench 1. A drive plate 26 is rotatably connected to the bottom of the fixed frame 19 via a rotating shaft. The drive plate 26 is coaxially arranged with the positioning plate 18. A clamping cylinder 27 is integrally formed at the bottom of the drive plate 26. The clamping cylinder 27 is coaxially arranged with the drive plate 26. Several clamping grooves 28 are opened on the side wall of the clamping cylinder 27. The length direction of the clamping grooves 28 is parallel to the axis of the clamping cylinder 27. A clamping rod 29 is rotatably connected to the inner side wall of the clamping groove 28 via a rotating shaft. The clamping rod 29 is T-shaped and operates in a lever form during the rotation of the clamping rod 29. A first fixed rod 20 passes through both the drive plate 26 and the clamping cylinder 27. The first fixed rod 20, the drive plate 26, and the clamping cylinder 27 are all coaxially arranged. A motion component is provided inside the clamping cylinder 27 to drive the clamping rod 29 to move.

[0048] Reference Figure 1 and Figure 7 The motion assembly includes a control cylinder 30, which is placed inside a clamping cylinder 27 and slidably connected to the inner wall of the clamping cylinder 27. The clamping cylinder 27 and the control cylinder 30 are coaxially arranged. A control groove 31 is formed on the inner wall of the control cylinder 30. A clamping rod 29 passes through one side wall and is inserted into the control groove 31. A control spring 32 is installed inside the clamping cylinder 27. One end of the control spring 32 is attached to the inner wall of the clamping cylinder 27, and the other end is attached to the bottom of the control cylinder 30. The control spring 32 is used to push the control cylinder 30 to move, thereby causing the inner wall of the control groove 31 to push the clamping rod 29 to move. An operating groove is formed on the side wall of the clamping cylinder 27 for operation. The length of the slot is parallel to the axis of the clamping cylinder 27. An operating rod is inserted into the operating slot, and the end of the operating rod is attached to the outer wall of the control cylinder 30. The operating rod is used to drive the control cylinder 30 to slide. When the operating rod descends, it causes the control cylinder 30 to descend, which pushes the clamping rod 29 to move. The end of the clamping rod 29 away from the inner wall of the control slot 31 rises, clamping the workpiece between the clamping rod 29 and the driving plate 26. At the same time, a rotating motor for driving the driving plate 26 to rotate is fixed to the side wall of the fixing frame 19 by bolts. When the rotating motor is started, it drives the driving plate 26 to rotate, thereby driving the clamped workpiece 41 to be welded to rotate.

[0049] Reference Figure 7 The operating lever is L-shaped, with one side wall parallel to the end face of the drive plate 26 and the other side wall passing through and slidably connected to the end face of the drive plate 26. An operating electric cylinder is fixed to the upper end face of the drive plate 26 by bolts. The operating electric cylinder is used to control the sliding of the operating lever. A fixing electric cylinder is fixed to the fixing frame 19 by bolts. The fixing electric cylinder is used to drive the first fixing rod 20 to slide, thereby facilitating the clamping of the workpiece.

[0050] Secondly, this application discloses a welding process applicable to the above-mentioned arc-shaped component welding device, comprising the following steps:

[0051] 1. Place the workpiece in the predetermined position on the workbench 1; and set the middle bottom to ensure an interference fit of 0.2-0.3mm with the outer shell, and change the original mating surface from a straight edge to a 2° beveled edge, so that the outer shell and the middle bottom have sufficient support after pressing and fitting, and the shrinkage of the cup bottom after welding is controlled within 0.3mm.

[0052] 2. Start the electric cylinder 17, which drives the push block 4 to move. The push block 4 clamps the workpiece and makes the suction cup 8 adhere to the weld of the workpiece. The push block 4 transfers the workpiece to the positioning plate 18, so that the workpiece and the positioning plate 18 are coaxially set.

[0053] 3. The first locking rod 44 slides and drives the second locking rod 45 to abut against the outside of the workpiece;

[0054] 4. The operating lever slides, causing the control cylinder 30 to slide. The inner wall of the control groove 31 on the control cylinder 30 pushes the clamping rod 29 to move, so that the clamping rod 29 clamps the workpiece between the clamping rod 29 and the driving plate 26.

[0055] 5. Start the welding gun head 9 and spot weld the weld seam; the two laser points are spot welded and fixed at the same time, which can solve the problem of shaking after the steel base and the cup body are fitted together, and there will be no misalignment or deviation. The operation is more convenient and faster.

[0056] 6. The rotating plate 26 drives the workpiece to rotate. During the rotation, the suction cup 8 plays a shaping role on the concave part of the weld, reducing its degree of concavity. At the same time, the welding gun head 9 performs continuous welding until the welding is completed.

[0057] The implementation principle of the arc-shaped component welding device and its welding process in this application embodiment is as follows: The electric cylinder 17 is activated, which drives the push block 4 to move. The push block 4 clamps the workpiece and causes the suction cup 8 to adhere to the weld seam of the workpiece. The push block 4 transfers the workpiece to the positioning plate 18, making the workpiece and the positioning plate 18 coaxially positioned. The operating lever slides, causing the control cylinder 30 to slide. The inner wall of the control groove 31 on the control cylinder 30 pushes the clamping rod 29 to move, causing the clamping rod 29 to clamp the workpiece between the clamping rod 29 and the driving plate 26. The welding gun head 9 is activated to spot weld and fix the weld seam. The driving plate 26 rotates, causing the workpiece to rotate. During the rotation, the suction cup 8 plays a shaping role on the concave part of the weld seam, reducing its concavity. At the same time, the welding gun head 9 performs continuous welding until the welding is completed.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A welding device for arc-shaped parts, characterized in that: The workbench (1) includes a support frame (2) fixed to the side wall of the workbench (1), two push rods (3) movably connected to the side wall of the support frame (2), the two push rods (3) are parallel to each other and push blocks (4) are fixed at the ends of the push rods (3), clamping guide surfaces (5) for clamping are provided on the opposite side walls of the push blocks (4), push grooves (6) are provided on the push blocks (4), a plurality of stabilizing turntables (7) are rotatably connected to the inner side wall of the push grooves (6), suction cups (8) are fixed on the side walls of the stabilizing turntables (7), and welding gun heads (9) for welding are fixed on the workbench (1). A positioning disk (18) is rotatably connected to the workbench (1). The axis of the positioning disk (18) is the same as the axis of the workpiece after it is clamped. A fixing frame (19) is fixed on the workbench (1). A driving plate (26) is rotatably connected to the bottom of the fixing frame (19). The driving plate (26) is coaxially arranged with the positioning disk (18). A clamping cylinder (27) is fixed to the bottom of the driving plate (26). Several clamping grooves (28) are opened on the side wall of the clamping cylinder (27). A clamping rod (29) is rotatably connected to the inner side wall of the clamping groove (28). The clamping rod (29) is T-shaped and operates in the form of a lever. A first fixing rod (20) passes through both the driving plate (26) and the clamping cylinder (27). A positioning component for further positioning the workpiece (41) to be welded is provided on the workbench (1). The positioning assembly includes a plurality of locking holes (43) opened on the worktable (1). A first locking rod (44) is slidably connected in the locking holes (43). A second locking rod (45) is rotatably connected to the end face of the first locking rod (44) opposite to the positioning disk (18). A locking platform (46) for positioning the workpiece (41) to be welded is rotatably connected to the end of the second locking rod (45). A supporting rod (48) is fixed to the side wall of the locking platform (46) and the supporting rod (48) passes through the first locking rod (44). A supporting spring (51) is provided on the side wall of the supporting rod (48) to push the locking platform (46) to slide in a direction away from the first locking rod (44). The clamping cylinder (27) is provided with a motion component for driving the clamping rod (29) to move. The motion component includes a control cylinder (30) slidably connected to the inner side wall of the clamping cylinder (27). The side wall of the control cylinder (30) is provided with a control groove (31). The clamping rod (29) passes through the control groove (31). The clamping cylinder (27) is provided with a control spring (32) for pushing the control cylinder (30) to move. The side wall of the clamping cylinder (27) is provided with an operation groove. An operation rod passes through the operation groove and is fixed to the side wall of the control cylinder (30).

2. The arc-shaped component welding device according to claim 1, characterized in that: The support frame (2) is provided with a driving component to facilitate the movement of the push rod (3). The driving component includes two sliding frames (10) fixed to the side wall of the support frame (2). An adjustment frame (11) is slidably connected to the sliding frame (10). The adjustment frame (11) is arranged in a "V" shape, and one side wall of the adjustment frame (11) is slidably connected to the sliding frame (10). An adjustment groove (12) is opened on the other side wall. The push rod (3) is rotatably connected to the inner side wall of the adjustment groove (12). A reset rod (13) is fixed at the end of the push rod (3). A reset spring (14) for pulling the reset rod (13) is provided between the reset rod (13) and the inner side wall of the adjustment groove (12).

3. The arc-shaped component welding device according to claim 2, characterized in that: The inner wall of the adjustment groove (12) is fixed with a limiting rod (15) for limiting the position of the push rod (3). The corner of the adjustment frame (11) is rotatably connected with a driving rod (16). The support frame (2) is fixed with a driving electric cylinder (17). The driving rod (16) is rotatably connected to the piston rod of the driving electric cylinder (17).

4. The arc-shaped component welding device according to claim 1, characterized in that: The operating lever is "L" shaped, with one side wall of the operating lever parallel to the drive plate (26) and the other side wall slidably connected to the end face of the drive plate (26).

5. A welding process applicable to the arc-shaped component welding apparatus according to any one of claims 1-4, characterized in that, Includes the following steps: (1) Place the workpiece on the workbench (1); (2) Start the electric cylinder (17), which drives the push block (4) to move and clamp the workpiece. The push block (4) transfers the workpiece to the positioning plate (18). (3) The first locking rod (44) slides and drives the second locking rod (45) to abut against the outside of the workpiece; (4) The operating lever slides, driving the clamping rod (29) to clamp the workpiece inside; (5) Start the welding gun head (9) and spot weld the weld seam. (6) The rotating plate (26) drives the workpiece to rotate, and the welding gun head (9) performs continuous welding until the welding is completed.

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