Automobile part welding tool and welding method

Abstract

The invention relates to the technical field of automobile part welding, in particular to an automobile part welding tool and a welding method.The automobile part welding tool comprises a tool shell and a clamping jaw, the outer wall of the lower end of the tool shell is fixedly connected with an outer interlayer, and the middle end of the interior of the tool shell is fixedly connected with a positioning column; a telescopic frame is fixedly connected to the top of the outer interlayer, a welding assembly is arranged on the inner side of the top of the telescopic frame, and a clamping device is arranged at the bottom of the positioning column and the bottom of the sliding column. And the telescopic frame moves downwards to replace the second rotating wheel with the automobile part, so that the welding rod at the bottom of the first rotating wheel surrounds the outer wall of the part for welding, the problem that stacking welding between irregular shapes is inconvenient is solved, and welding of parts of different sizes is achieved by adjusting the distance between the sliding columns on the two sides.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile part welding, and more specifically, to a welding tooling and welding method for automobile parts. Background Art

[0002] An automobile part welding tooling refers to a special equipment and tool system used for positioning, clamping and fixing parts during the manufacturing and repair of automobiles to ensure welding accuracy, efficiency and quality. Its core function is to achieve precise alignment and stable fixation of parts through the design and application of tooling fixtures, thereby ensuring the strength, sealing performance and consistency of welding joints.

[0003] Chinese Publication No.: CN117206789A discloses a welding positioning tooling for automobile part production, including an operation table, a support plate arranged on the operation table, a base arranged on the support plate, and a workpiece placed on the base; a pressing plate arranged above the operation table, the pressing plate is arranged on both sides of the support plate and abuts against the base; an assembly installed on the pressing plate, the assembly abuts against both sides of the workpiece; there are several assemblies, and the assemblies are installed on the side of the pressing plate facing the base; the present invention positions parts with irregular shapes, has high positioning efficiency, and only processes the assemblies. Compared with producing a complete fixture, the cost is greatly reduced, which is beneficial to improving product competitiveness.

[0004] Although the above patent uses the assembly to abut against both sides of the workpiece to achieve positioning of parts with irregular shapes and has high positioning efficiency, considering that during the positioning of some automobile parts, the automobile parts are multi-layered and have different widths and thicknesses, it is difficult to grasp the welding positions or the blocking effects on some positions during the positioning welding process, and it is difficult to perform complete welding.

[0005] In view of this, we propose a welding tooling and welding method for automobile parts. Summary of the Invention

[0006] The purpose of the present invention is to provide a welding tooling and welding method for automobile parts to solve the problems raised in the above background art.

[0007] To achieve the above object, on the one hand, the present invention provides an automobile part welding tooling and a welding method, including a tooling housing and clamping jaws. The outer wall of the lower end of the tooling housing is fixedly connected with an outer sandwich layer. An inner groove is provided in the outer sandwich layer. A positioning column is fixedly connected to the middle end inside the tooling housing. Through rods are fixedly connected to both sides of the positioning column. A sliding column is slidably connected to the outer wall of the through rod. A positioning table is fixedly connected to the inner side of the positioning column. Telescopic tables are telescopically connected to both sides of the positioning table. A telescopic frame is fixedly connected to the top of the outer sandwich layer. A welding assembly is arranged inside the top of the telescopic frame. A clamping device is arranged at the bottom of the positioning column and the sliding column.

[0008] The clamping jaws are semi-cylindrical. A plurality of small clamping jaws with the same diameter as the radius of the clamping jaws are slidably connected to the inner side of the clamping jaws. Arc-shaped grooves are provided in the positioning column and the two side sliding columns. The arc-shaped grooves of the positioning column and the two side sliding columns are combined to fit with the outer wall of the clamping jaws.

[0009] As a preference of the present invention, a first strip-shaped hole is provided on the surface of the positioning table. Through sliding rails are provided at the tops of the positioning column and the two side sliding columns. A first strip-shaped hole is provided on the surface of the positioning table. Second strip-shaped holes are provided on the surfaces of the two telescopic tables.

[0010] As a preference of the present invention, a top frame is fixedly connected to the top of the telescopic frame. A positioning groove is provided at the top position of the telescopic frame. The welding assembly is located in the positioning groove. The welding assembly includes a first motor, and the first motor is fixedly connected to the top of the top frame.

[0011] As a preference of the present invention, a rotating sleeve is fixedly connected to the output end of the first motor. A first runner is movably connected to the inner side of the rotating sleeve. A second runner is arranged on one side of the first runner. A vertical rod is fixedly connected through the second runner. The vertical rod is fixedly connected to the inner wall of the positioning groove. A sliding piece is slidably connected to the outer wall of the vertical rod. An electromagnet is fixedly connected to the lower end of the vertical rod.

[0012] As a preference of the present invention, the clamping device includes a second motor, and the second motor is fixedly connected to the outer wall of the outer sandwich layer. A threaded rod is fixedly connected to the output end of the second motor. A first thread groove and a second thread groove are provided on the outer wall of the threaded rod. The first thread groove and the second thread groove are symmetrically provided with the same first thread groove and second thread groove with respect to the midpoint of the threaded rod. The first thread grooves and the second thread grooves on both sides face in opposite directions. The pitches of the first thread groove and the second thread groove are different.

[0013] Preferably in the present invention, a first nut is threadedly connected to the outer wall of the first threaded groove. The top of the first nut is fixedly connected to a first slider through a column. The first slider is slidably connected within a through rail. The jaw is rotatably connected to the outer wall of the column at the top of the first slider. A second nut is threadedly connected to the outer wall of the second threaded groove. Both ends of the second nut are fixedly connected to a first telescopic rod.

[0014] Preferably in the present invention, second telescopic rods are provided on the outer walls at both ends of the threaded rod. On both sides, the second telescopic rods are fixedly connected to a cross bar at the ends away from the threaded rod. A connecting column is fixedly connected to the top of the second telescopic rod. The connecting column is fixedly connected to the outer wall of the positioning column at the end away from the second telescopic rod.

[0015] Preferably in the present invention, rollers are rotatably connected to both ends of the cross bar. The rollers are in contact with the inner wall of the inner groove. A first sliding ring is slidably connected to the outer wall of the cross bar. The top of the first sliding ring is fixedly connected to a second slider. The second slider is slidably connected through a column within the through rail of the sliding column. The top of the second slider is rotatably connected to a positioning wheel through a column. A fixed rod is fixedly connected to one side of the first sliding ring. The fixed rod is telescopically connected to a second sliding ring at the end away from the first sliding ring. The first telescopic rod is fixedly connected to the outer wall of the second sliding ring at the end away from the second nut.

[0016] Preferably in the present invention, a fixed column is fixedly connected to the outer wall at the middle of the cross bar. An extension rod is fixedly connected to one side of the fixed column in the horizontal direction. The extension rod is telescopically connected to a telescopic column in the vertical direction at the end away from the fixed column. The telescopic column is fixedly connected to a lifting plate through a through positioning platform at the end away from the extension rod.

[0017] On the other hand, the present invention also provides a welding method for a welding tool for automotive parts, and its operation steps are as follows:

[0018] S1. First, the staff transports the automotive parts to be stacked and welded to the positioning platform;

[0019] S2. Then, driven by the clamping device, the automotive parts are accurately positioned and clamped by the jaws and the positioning wheels;

[0020] S3. Then, the welding assembly is used to fix the automotive metal parts and position and stack-weld them with the automotive parts on the positioning platform;

[0021] S4. Finally, after welding is completed, the welded automotive parts are taken off.

[0022] Compared with the prior art, the beneficial effects of the present invention:

[0023] 1. In this welding tooling and welding method for automotive parts, the rotation of the threaded rod driven by the second motor causes the first threaded groove to drive the clamping jaws to clamp the automotive parts, and multiple small clamping jaws arranged on the inner side of the clamping jaws are used to adapt to the fixation of the outer wall of irregular parts, which can ensure that when clamping the irregular side of the automotive parts, incomplete clamping will not cause the automotive parts to slip off during welding.

[0024] 2. In this welding tooling and welding method for automotive parts, the rotation of the threaded rod drives the second threaded groove to drive the positioning wheel to displace and position the parts with irregular outer walls, enabling the stacked automotive parts to be quickly positioned and welded.

[0025] 3. In this welding tooling and welding method for automotive parts, the telescopic frame moves downward to replace the second runner, and the welding rod at the bottom of the first runner welds around the outer wall of the part. This enables the welding rod to always weld along the contact edge of the two stacked parts after positioning and clamping, solving the problem of inconvenient stacked welding between irregular shapes.

[0026] 4. In this welding tooling and welding method for automotive parts, by adjusting the distance between the sliding columns on both sides and the positioning columns, the height of the lifting plate for the parts can be achieved, and clamping, positioning, and welding of automotive parts of different sizes can be realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is an overall three-dimensional schematic diagram of the welding tooling for automotive parts of the present invention;

[0028] Figure 2 It is an overall transverse cross-sectional schematic diagram of the welding tooling for automotive parts of the present invention;

[0029] Figure 3 It is an overall longitudinal cross-sectional schematic diagram of the welding tooling for automotive parts of the present invention;

[0030] Figure 4 It is an expanded three-dimensional schematic diagram of the telescopic frame and the welding assembly of the welding tooling for automotive parts of the present invention;

[0031] Figure 5 It is a three-dimensional schematic diagram of the positioning table of the welding tooling for automotive parts of the present invention;

[0032] Figure 6 It is an internal three-dimensional schematic diagram of the tooling housing of the welding tooling for automotive parts of the present invention;

[0033] Figure 7 It is an expanded three-dimensional schematic diagram of the positioning table of the welding tooling for automotive parts of the present invention;

[0034] Figure 8 It is a three-dimensional schematic diagram of the clamping device of the welding tooling for automotive parts of the present invention;

[0035] Figure 9 This is the complete three-dimensional schematic diagram of the positioning table contraction of the welding tooling for automotive parts of the present invention;

[0036] The meanings of each label in the figure are as follows:

[0037] 1. Tooling housing; 11. Outer sandwich layer; 111. Inner groove; 12. Positioning column; 121. Through rod; 1211. Through slide rail; 122. Sliding column; 1221. Arc groove; 123. Positioning table; 1231. First strip hole; 124. Telescopic table; 1241. Second strip hole; 13. Telescopic frame; 131. Top frame; 132. Positioning groove; 2. Welding assembly; 21. First motor; 22. Rotating sleeve; 23. First runner; 24. Second runner; 241. Vertical rod; 242. Sliding piece; 25. Electromagnet; 3. Claw; 31. Positioning wheel;

[0038] 4. Clamping device; 41. Second motor; 411. Threaded rod; 4111. First thread groove; 4112. Second thread groove; 412. First nut; 4121. First slider; 413. Second nut; 4131. First telescopic rod; 42. Second telescopic rod; 421. Connecting column; 43. Cross bar; 431. Roller; 432. First sliding ring; 4321. Second slider; 4322. Fixed rod; 4323. Second sliding ring; 433. Fixed column; 4331. Extension rod; 4332. Telescopic column; 44. Lifting plate. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be understood as a limitation to the present invention.

[0041] Embodiment 1

[0042] Please refer toFigures 1-9 As shown in the figure, this embodiment provides a welding tool for automotive parts, including a tooling housing 1 and clamping jaws 3. The outer wall of the lower end of the tooling housing 1 is fixedly connected with an outer sandwich layer 11. An inner groove 111 is formed in the outer sandwich layer 11. A positioning column 12 is fixedly connected to the middle end inside the tooling housing 1. Through rods 121 are fixedly connected to both sides of the positioning column 12. A sliding column 122 is slidably connected to the outer wall of the through rod 121. A positioning table 123 is fixedly connected to the inner side of the positioning column 12. Telescopic tables 124 are telescopically connected to both sides of the positioning table 123. A telescopic frame 13 is fixedly connected to the top of the outer sandwich layer 11. A welding assembly 2 is arranged inside the top of the telescopic frame 13. A clamping device 4 is arranged at the bottom of the positioning column 12 and the sliding column 122; the clamping jaws 3 are semi-cylindrical. A plurality of small clamping jaws 3 with the same diameter as the radius of the clamping jaws 3 are slidably connected to the inner side of the clamping jaws 3. Arc-shaped grooves 1221 are formed in the positioning column 12 and the two side sliding columns 122. The arc-shaped grooves 1221 of the positioning column 12 and the two side sliding columns 122 are combined and fit with the outer wall of the clamping jaws 3;

[0043] Among them: An electric slide rail is installed in the inner groove 111. The electric slide rail is used to drive the two side rollers 431 to drive the two side cross bars 43 and the sliding column 122 to slide towards the positioning column 12.

[0044] As Figures 5-7 shown, a first strip-shaped hole 1231 is formed on the surface of the positioning table 123. Through slide rails 1211 are formed at the tops of the positioning column 12 and the two side sliding columns 122. A first strip-shaped hole 1231 is formed on the surface of the positioning table 123. Second strip-shaped holes 1241 are formed on the surfaces of the two side telescopic tables 124. A top frame 131 is fixedly connected to the top of the telescopic frame 13. A positioning groove 132 is formed at the top position of the telescopic frame 13. The welding assembly 2 is located in the positioning groove 132. The welding assembly 2 includes a first motor 21, and the first motor 21 is fixedly connected to the top of the top frame 131.

[0045] As Figures 2-4 shown, the output end of the first motor 21 is fixedly connected with a rotating sleeve 22. A first runner 23 is movably connected to the inner side of the rotating sleeve 22. A second runner 24 is arranged on one side of the first runner 23. A vertical rod 241 is fixedly connected through the second runner 24. The vertical rod 241 is fixedly connected to the inner wall of the positioning groove 132. A sliding piece 242 is slidably connected to the outer wall of the vertical rod 241. An electromagnet 25 is fixedly connected to the lower end of the vertical rod 241.

[0046] As Figure 8As shown in the figure, the clamping device 4 includes a second motor 41. The second motor 41 is fixedly connected to the outer wall of the outer sandwich layer 11. The output end of the second motor 41 is fixedly connected with a threaded rod 411. The outer wall of the threaded rod 411 is provided with a first thread groove 4111 and a second thread groove 4112. The first thread groove 4111 and the second thread groove 4112 are symmetrically arranged with respect to the midpoint of the threaded rod 411, and the same first thread groove 4111 and second thread groove 4112 are provided. The first thread grooves 4111 and the second thread grooves 4112 on both sides face in opposite directions, and the pitches of the first thread groove 4111 and the second thread groove 4112 are different. The outer wall of the first thread groove 4111 is threadedly connected with a first nut 412. The top of the first nut 412 is fixedly connected with a first slider 4121 through a column. The first slider 4121 is slidably connected in the through rail 1211. The clamping jaw 3 is rotatably connected to the outer wall of the column at the top of the first slider 4121. The outer wall of the second thread groove 4112 is threadedly connected with a second nut 413. Both ends of the second nut 413 are fixedly connected with a first telescopic rod 4131. Both ends of the outer wall of the threaded rod 411 are provided with second telescopic rods 42. Both ends of the two second telescopic rods 42 away from the threaded rod 411 are fixedly connected with a cross bar 43. The top of the second telescopic rod 42 is fixedly connected with a connecting column 421. The end of the connecting column 421 away from the second telescopic rod 42 is fixedly connected to the outer wall of the positioning column 12.

[0047] As Figures 7-8 shown, both ends of the cross bar 43 are rotatably connected with rollers 431. The rollers 431 are in contact with the inner wall of the inner groove 111. A first sliding ring 432 is slidably connected to the outer wall of the cross bar 43. The top of the first sliding ring 432 is fixedly connected with a second slider 4321. The second slider 4321 is slidably connected through a column in the through rail 1211 of the sliding column 122. The top of the second slider 4321 is rotatably connected with a positioning wheel 31 through a column. One side of the first sliding ring 432 is fixedly connected with a fixing rod 4322. The end of the fixing rod 4322 away from the first sliding ring 432 is telescopically connected with a second sliding ring 4323. The end of the first telescopic rod 4131 away from the second nut 413 is fixedly connected to the outer wall of the second sliding ring 4323. The middle outer wall of the cross bar 43 is fixedly connected with a fixing column 433. One side of the fixing column 433 in the horizontal direction is fixedly connected with an extension rod 4331. The end of the extension rod 4331 away from the fixing column 433 is vertically telescopically connected with a telescopic column 4332. The end of the telescopic column 4332 away from the extension rod 4331 is fixedly connected with a lifting plate 44 through the through positioning table 123.

[0048] It can be seen from this that when it is necessary to position and clamp irregularly shaped automotive parts, such as Figures 6-9As shown in the figure, considering that two automotive components are stacked and welded to each other, the automotive component that needs to be positioned on the positioning table 123 is referred to as component A, and the automotive component fixed at the position of the welding assembly 2 is referred to as component B. In the preparation stage, the staff transports component A that needs to be stacked and welded to the top of the positioning table 123 and is supported by the lifting plate 44, while component B is vertically suspended and fixed at the bottom of the positioning groove 132 by the electromagnet 25. After the placement is completed, the clamping device 4 is first used to position and clamp component A;

[0049] As Figure 8 shown in the figure, driven by the second motor 41, the threaded rod 411 rotates. At the same time, during the rotation of the threaded rod 411, the first threaded groove 4111 and the second threaded groove 4112 will rotate together. The rotation of the first threaded groove 4111 will drive the first nut 412 to slide to the left. At the same time, the first nut 412 will drive the first slider 4121 and the clamping jaw 3 to slide inwards and tighten together, clamping component A placed on the top of the lifting plate 44. It should be noted that when the multiple small clamping jaws 3 distributed on both sides of the clamping jaw 3 come into contact with the irregular side position of component A, the multiple small clamping jaws 3 that first come into contact with component A will tilt towards the side that has not come into contact with component A and finally fit with the side of component A. At this time, under the fit of the multiple small clamping jaws 3, the two sides of component A are fixedly clamped, which can ensure that when clamping the irregular side of component A, the clamping is incomplete and the automotive component slips off during welding;

[0050] Embodiment 2

[0051] Different from Embodiment 1, when positioning during the clamping process of component A, as Figure 8 shown in the figure, similar to Embodiment 1, during the process of the threaded rod 411 driving the second threaded groove 4112 to rotate, the second nut 413 will also slide to the left. At this time, the second nut 413 will drive the first sliding ring 432, the fixed rod 4322, and the second sliding ring 4323 to slide inwards together through the first telescopic rod 4131. And when the two first sliding rings 432 gradually slide inwards and approach each other, they will drive the second slider 4321 and the positioning wheel 31 to approach each other. This makes the two positioning wheels 31 gradually approach the outer walls of both sides of component A. Under the extrusion of the two positioning wheels 31, component A slides a short distance towards the other side until it is positioned by the two positioning wheels 31 on the other sliding column 122. This enables the adjustment of the position of component A during the clamping process of component A and the positioning of component A;

[0052] It should be noted that when the threaded rod 411 drives the first threaded groove 4111 and the second threaded groove 4112 to rotate simultaneously, since the pitch of the first threaded groove 4111 is greater than that of the second threaded groove 4112, the speed of the first nut 412 driven by the first threaded groove 4111 moving inward is slower than that of the second nut 413 driven by the second threaded groove 4112. Then, the positioning wheel 31 driven by the second nut 413 will reach the outer walls on both sides of the component A first. When both positioning wheels 31 on both sides are against the outer wall of the component A and the clamping jaws 3 have not fully clamped the component A, the positioning wheel 31 and the first sliding ring 432 against the outer wall of the component A will stop moving. At this time, the fixed rod 4322 will contract into the second sliding ring 4323 due to the reverse thrust until the clamping jaws 3 fully clamp the component A;

[0053] After the positioning and clamping of the component A are completed, the telescopic frame 13 will drive the component B adsorbed and fixed by the electromagnet 25 to move downward until after the component A and the component B are stacked, the component B will be blocked and move upward in the positioning groove 132 to squeeze the second rotating wheel 24, causing the second rotating wheel 24 to move upward and separate from the first rotating wheel 23 and be replaced by the upper half outer wall of the component B. At this time, the rotating sleeve 22 rotates under the drive of the first motor 21, and at the same time, the inner wall of the rotating sleeve 22 drives the first rotating wheel 23 to rotate. At this time, under the rotation of the rotating sleeve 22 and the transmission between the rotating sleeve 22 and the fixed outer wall of the component B, the first rotating wheel 23 will be driven to rotate along the outer wall of the component B. A welding rod is installed at the bottom of the first rotating wheel 23 and aligned with the connection position between the component A and the component B for welding. This enables the welding rod to always weld along the contact edge of the two stacked components after the positioning and clamping are completed, solving the problem of inconvenient stacking and welding between irregular shapes;

[0054] In addition, the electric slide rails installed in the inner groove 111 can be controlled to drive the rollers 431 on both sides to roll inward and drive the sliding columns 122 on both sides to slide towards the positioning columns 12. At this time, the sliding columns 122 on both sides will also drive the telescopic platforms 124 on both sides to contract into the positioning platform 123 together. Similarly, the cross bars 43 on both sides will drive the extension rods 4331 to contract into the telescopic columns 4332. Since a plurality of balls are installed in the telescopic columns 4332, when the extension rods 4331 contract into the telescopic columns 4332, the balls will be pushed upward, causing the upper end of the telescopic column 4332 to elongate and drive the lifting plate 44 to move upward. The positioning wheels 31 on both sides will also approach the clamping jaws 3. By contracting the sliding columns 122 on both sides, clamping, positioning, and welding of automotive components of different sizes can be achieved.

[0055] Embodiment III

[0056] This embodiment provides a method for using a welding fixture for automotive components, including the following steps:

[0057] S1. First, the staff transports the automotive parts to be stacked and welded to the positioning table 123;

[0058] S2. Then, driven by the clamping device 4, the automotive parts are accurately positioned and clamped by the clamping jaws 3 and the positioning wheels 31;

[0059] S3. Then, the welding assembly 2 is used to fix the automotive metal parts and position and stack-weld them with the automotive parts on the positioning table 123;

[0060] S4. Finally, after welding is completed, the welded automotive parts are removed.

[0061] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and descriptions in the specification are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. An automobile part welding tooling, comprising a tooling housing (1) and a jaw (3), characterized in that: The outer wall of the lower end of the tooling housing (1) is fixedly connected with an outer sandwich layer (11). An inner groove (111) is formed in the outer sandwich layer (11). A positioning column (12) is fixedly connected to the middle end inside the tooling housing (1). Through rods (121) are fixedly connected to both sides of the positioning column (12). A sliding column (122) is slidably connected to the outer wall of the through rod (121). A positioning table (123) is fixedly connected to the inner side of the positioning column (12). Telescopic platforms (124) are telescopically connected to both sides of the positioning table (123). A telescopic frame (13) is fixedly connected to the top of the outer sandwich layer (11). A welding assembly (2) is arranged inside the top of the telescopic frame (13). A clamping device (4) is arranged at the bottom of the positioning column (12) and the sliding column (122). The clamping jaw (3) is semi-cylindrical. A plurality of small clamping jaws (3) with the same diameter as the radius of the clamping jaw (3) are slidably connected to the inner side of the clamping jaw (3). Arc-shaped grooves (1221) are formed in the positioning column (12) and the sliding columns (122) on both sides. The arc-shaped grooves (1221) of the positioning column (12) and the sliding columns (122) on both sides are combined and fit with the outer wall of the clamping jaw (3).

2. The welding tooling for automotive parts according to claim 1, wherein: A first strip-shaped hole (1231) is formed in the surface of the positioning table (123). Through slide rails (1211) are formed in the tops of the positioning column (12) and the sliding columns (122) on both sides. A first strip-shaped hole (1231) is formed in the surface of the positioning table (123). Second strip-shaped holes (1241) are formed in the surfaces of the telescopic platforms (124) on both sides.

3. The welding tooling for automotive parts according to claim 2, characterized in that: A top frame (131) is fixedly connected to the top of the telescopic frame (13). A positioning groove (132) is formed at the top position of the telescopic frame (13). The welding assembly (2) is located in the positioning groove (132). The welding assembly (2) includes a first motor (21). The first motor (21) is fixedly connected to the top of the top frame (131).

4. The welding tooling for automotive parts according to claim 3, characterized in that: A rotating sleeve (22) is fixedly connected to the output end of the first motor (21). A first runner (23) is movably connected to the inner side of the rotating sleeve (22). A second runner (24) is arranged on one side of the first runner (23). A vertical rod (241) is fixedly connected through the second runner (24). The vertical rod (241) is fixedly connected to the inner wall of the positioning groove (132). A sliding piece (242) is slidably connected to the outer wall of the vertical rod (241). An electromagnet (25) is fixedly connected to the lower end of the vertical rod (241).

5. The welding tooling for automotive parts according to claim 4, wherein: The clamping device (4) includes a second motor (41). The second motor (41) is fixedly connected to the outer wall of the outer sandwich layer (11). The output end of the second motor (41) is fixedly connected to a threaded rod (411). The outer wall of the threaded rod (411) is provided with a first thread groove (4111) and a second thread groove (4112). The first thread groove (4111) and the second thread groove (4112) are symmetrically arranged with respect to the midpoint of the threaded rod (411) and have the same first thread groove (4111) and second thread groove (4112). The first thread grooves (4111) and the second thread grooves (4112) on both sides face in opposite directions, and the pitches of the first thread groove (4111) and the second thread groove (4112) are different.

6. The welding tooling for automotive parts according to claim 5, characterized in that: A first nut (412) is threadedly connected to the outer wall of the first thread groove (4111). The top of the first nut (412) is fixedly connected to a first slider (4121) through a column. The first slider (4121) is slidably connected within a through rail (1211). The jaw (3) is rotatably connected to the outer wall of the column at the top of the first slider (4121). A second nut (413) is threadedly connected to the outer wall of the second thread groove (4112). Both ends of the second nut (413) are fixedly connected to a first telescopic rod (4131).

7. The welding tooling for automotive parts according to claim 6, characterized in that: Both ends of the outer wall of the threaded rod (411) are provided with second telescopic rods (42). Both sides of the second telescopic rods (42) are fixedly connected to a cross bar (43) at the end away from the threaded rod (411). The top of the second telescopic rod (42) is fixedly connected to a connecting column (421). The connecting column (421) is fixedly connected to the outer wall of the positioning column (12) at the end away from the second telescopic rod (42).

8. The welding tooling for automotive parts according to claim 7, wherein: Both ends of the cross bar (43) are rotatably connected to rollers (431). The rollers (431) are in contact with the inner wall of the inner groove (111). A first sliding ring (432) is slidably connected to the outer wall of the cross bar (43). The top of the first sliding ring (432) is fixedly connected to a second slider (4321). The second slider (4321) is slidably connected through a column within the through rail (1211) of the sliding column (122). The top of the second slider (4321) is rotatably connected to a positioning wheel (31) through a column. One side of the first sliding ring (432) is fixedly connected to a fixed rod (4322). The fixed rod (4322) is telescopically connected to a second sliding ring (4323) at the end away from the first sliding ring (432). The first telescopic rod (4131) is fixedly connected to the outer wall of the second sliding ring (4323) at the end away from the second nut (413).

9. The welding tooling for automotive parts according to claim 8, characterized in that: A fixing column (433) is fixedly connected to the outer wall of the middle end of the cross bar (43). An extension rod (4331) is fixedly connected to one side of the fixing column (433) in the horizontal direction. A telescopic column (4332) is telescopically connected to the extension rod (4331) in the vertical direction at the end far from the fixing column (433). A lifting plate (44) is fixedly connected to the end of the telescopic column (4332) far from the extension rod (4331) through the positioning table (123).

10. An automobile part welding tooling and a welding method, based on the automobile part welding tooling according to any one of claims 1-9, characterized in that, The method steps are as follows: S1. First, the staff conveys the automotive parts to be stacked and welded onto the positioning table (123). S2. Then, driven by the clamping device (4), the automotive parts are accurately positioned and clamped by the clamping jaws (3) and the positioning wheels (31). S3. Then, the welding assembly (2) is used to fix the automotive metal parts and position and stack-weld them with the automotive parts on the positioning table (123). S4. Finally, the welded automotive parts are removed after welding is completed.

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