Tooling fixture for welding automobile accessory

Abstract

A tooling fixture for welding an automobile accessory. The tooling fixture for welding an automobile accessory comprises a workbench (100), wherein transverse adjustment devices (200) are fixedly mounted on an upper side of the workbench (100), and a set of clamping devices (300) for clamping an automobile accessory is fixedly mounted at an adjustment end of each transverse adjustment device (200); and a support device (400) for supporting a welding position is provided on the workbench (100) and is located between the two sets of clamping devices (300). When the automobile accessory is welded, the automobile accessory can be clamped and fixed, thereby improving the welding quality.

Description

A fixture for welding automobile parts Technical Field

[0001] The present invention relates to the technical field of automobile parts processing equipment, in particular to a tooling fixture for welding automobile parts. Background Art

[0002] With the increasingly fierce competition in the auto parts processing market, the popularization of environmental protection concepts, and the continuous upgrading and application of technology, there are many types of auto parts. Nowadays, there are more and more car brands and types. In the process of automobile processing, different auto parts need to be welded and fixed.

[0003] During welding, due to the different sizes and shapes of automobile parts, manual fixation of the parts is usually required. Although this method can complete the welding work, the manual fixation operation will cause the parts to shake slightly during the welding process, making the welding position uneven. At the same time, it greatly increases the labor cost of the operator.

[0004] Summary of the Invention

[0005] (1) Technical problems solved

[0006] In view of the deficiencies in the prior art, the present invention provides a fixture for welding automobile parts, which can clamp and fix the automobile parts during welding, thereby improving the welding quality.

[0007] (2) Technical solution

[0008] To achieve the above-mentioned purpose, an embodiment of the present application provides a tooling fixture for welding automotive parts, including a workbench, a lateral adjustment device is fixedly installed on the upper side of the workbench, and a group of clamping devices for clamping automotive parts are fixedly installed at the adjustment ends of the lateral adjustment device; a support device for supporting the welding position is arranged on the workbench and located between the two groups of clamping devices.

[0009] Preferably, the lateral adjustment device includes a mounting shell fixed on the workbench, a bidirectional screw is rotatably connected to the mounting shell, the bidirectional screw passes through the mounting shell, and both ends are rotatably connected to support seats, and the support seats are fixedly mounted on the workbench; two first guide columns are fixedly mounted between the workbench and each of the support seats, and the length direction of the first guide columns is parallel to the bidirectional screw; a mounting platform is slidably provided on the first guide column, and the mounting platform is threadedly connected to the bidirectional screw; the clamping device is mounted on the upper side of the mounting platform; a driving assembly for controlling the rotation of the bidirectional screw is provided on the mounting shell; and locking assemblies for locking with the first guide columns are provided at both ends of the mounting platform.

[0010] Preferably, a first guide hole is provided on the mounting table, and the first guide column passes through the first guide hole; the locking assembly includes a locking sleeve fixed to both ends of the workbench and located on the outside of the first guide hole, and a locking tube connected to the locking sleeve; the locking sleeve is sleeved on the outside of the first guide column; a truncated cone-shaped locking cavity section is formed in the locking sleeve and located at one end close to the workbench, and a threaded cavity section is formed at the end of the locking sleeve away from the workbench; an operating sleeve is formed at one end of the locking tube, and a plurality of elastic sheets are arranged at intervals along the circumferential direction at the other end of the locking tube, and the operating sleeve is threadedly connected to the threaded cavity section; the diameter of the circle enclosed by the plurality of elastic sheets is smaller than the inner diameter of the thread of the locking tube; when the elastic sheet abuts against the locking cavity section, the elastic sheet abuts against the first guide column.

[0011] Preferably, an installation cavity is formed in the installation shell; the bidirectional screw rod passes through the installation cavity; the drive assembly includes a driven gear fixed on the bidirectional screw rod, and a drive shaft is rotatably connected to the installation shell and located on one side of the bidirectional screw rod; one end of the drive shaft is located on the outside of the installation shell and is connected to a control wheel; a driving gear is fixedly installed on the drive shaft and located in the installation cavity, and the driving gear and the driven gear are meshed.

[0012] Preferably, the clamping device includes a support arm fixed on the mounting platform, a horizontal support plate is fixedly installed on the upper side of the support arm, and the support plate supports the automobile accessories; a plurality of support components are arranged in an array on the support plate, and the support components are adjusted in height along the vertical direction to support the automobile accessories; a clamping component for clamping the upper side of the automobile accessories is arranged on the support arm and above the support plate.

[0013] Preferably, a penetrating mounting hole is provided on the support plate; the support assembly includes a support sleeve fixed under the support plate and located outside the mounting hole; an adjusting screw is connected to the inner thread of the support sleeve, and the end of the adjusting screw close to the workbench passes through the support sleeve and is fixedly installed with a first adjusting handwheel, and a spherical surface is formed on the end of the adjusting screw away from the workbench, the maximum diameter of the spherical surface is smaller than the inner diameter of the adjusting screw, and the spherical surface can pass through or enter the support sleeve.

[0014] 4. The repairing kit for automotive dents, according to claim 1, wherein a bottom of the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The through-hole comprises a first end, a second end of which is fixed to the bottom of the foot stand, the second end of which is fixed to the bottom of the foot stand. The bosses comprise a through-hole, a second end of which is fixed to the bottom of the foot stand, and a second end of which is fixed to the bottom of the foot stand.

[0015] Preferably, the support device includes a support frame fixed to the workbench, the support frame is located directly above the mounting shell, and vertical second guide columns are installed at intervals on the support frame, the lower ends of the second guide columns are respectively fixed to the workbench and the support frame, and the upper ends are located above the support frame; a guide sleeve is slidably connected to the upper end of the second guide column, and the end of the guide sleeve away from the support frame is fixedly connected to a transverse plate, the transverse plate is horizontally arranged, and the length direction is perpendicular to the length direction of the bidirectional screw rod; the transverse plate is located between the two second guide columns, and a jacking block is fixedly arranged on a side close to the support frame, and a lifting member is fixedly installed on the support frame, and the telescopic end of the lifting member is connected to the jacking block; a supporting assembly is provided with a plurality of welding seam positions at intervals in the length direction of the transverse plate for supporting.

[0016] Preferably, two groups of second guide holes are provided on the transverse plate at intervals in the width direction, and an adjustment hole is provided on the transverse plate and between the two groups of second guide holes; the supporting assembly includes a lifting screw rotatably connected to the adjustment hole, and a lifting sleeve is provided on the upper side of the transverse plate, and L-shaped guide rods are respectively fixed on both sides of the lifting sleeve close to the second guide hole, and the L-shaped guide rods are slidingly connected to the second guide hole; one end of the lifting screw is located on the upper side of the transverse plate and is threadedly connected to the lifting sleeve, and the other end is located on the lower side of the transverse plate and is connected to a second adjustment handwheel; a Y-shaped bracket is detachably connected to the upper side of the lifting sleeve, and both ends of the Y-shaped bracket respectively abut the automotive accessories on both sides of the welding seam.

[0017] (3) Beneficial effects

[0018] The present invention provides a fixture for welding automotive parts. During welding, two automotive parts are clamped and fixed by clamping devices on both sides, and a supporting device in the middle provides auxiliary support for the welding position. This ensures the stability of the workpiece and the welding quality during the welding process. During the clamping process, multiple support components provided on the upper side of the support plate, multiple second positioning screws provided on the positioning frame, and multiple supporting components provided in the support device can clamp and fix automotive parts of different shapes and uneven surfaces, ensuring the stability of the workpiece fixation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] FIG1 is a schematic structural diagram of a fixture for welding automobile parts according to the present invention;

[0020] FIG2 is a front view of a fixture for welding automobile parts;

[0021] FIG3 is a partial schematic diagram of a protruding lateral adjustment device in a fixture for welding automobile parts;

[0022] FIG4 is a cross-sectional view of a protruding locking assembly in a fixture for welding automotive parts;

[0023] FIG5 is a cross-sectional view of a protruding drive assembly in a fixture for welding automotive parts;

[0024] FIG6 is a schematic diagram of a protruding clamping device in a fixture for welding automobile parts;

[0025] FIG7 is a schematic diagram of a protruding support device in a fixture for welding automobile parts.

[0026] In the accompanying drawings:

[0027] 100. Workbench;

[0028] 200, lateral adjustment device; 210, mounting housing; 211, mounting cavity; 220, bidirectional screw; 230, support base; 240, first guide column; 250, mounting platform; 251, first guide hole; 260, locking assembly; 261, locking sleeve; 2611, locking cavity section; 2612, threaded cavity section; 262, locking tube; 2621, operating sleeve; 2622, elastic sheet; 270, drive assembly; 271, driven gear; 272, drive shaft; 273, control wheel; 274, driving gear;

[0029] 300, clamping device; 310, support arm; 320, support plate; 321, mounting hole; 330, support assembly; 331, support sleeve; 332, adjusting screw; 333, first adjusting handwheel; 334, spherical surface; 340, pressing assembly; 341, positioning frame; 342, positioning hole; 343, first positioning screw; 344, horizontal positioning arm; 345, telescopic sleeve; 3451, second positioning screw; 346, positioning frame; 3461, horizontal mounting plate; 3462, vertical mounting plate; 347, locking screw; 348, rubber sleeve; 349, handle;

[0030] 400. Support device; 410. Support frame; 420. Second guide column; 430. Guide sleeve; 440. Transverse plate; 441. Second guide hole; 442. Adjustment hole; 460. Lifting member; 470. Support assembly; 471. Lifting screw; 472. Lifting sleeve; 473. L-shaped guide rod; 474. Second adjustment handwheel; 475. Y-shaped bracket. DETAILED DESCRIPTION

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] Example

[0033] The present invention provides a fixture for welding automotive parts, as shown in Figures 1-7. The fixture comprises a workbench 100, with a transverse adjustment device 200 fixedly mounted on the upper side of the workbench 100. A set of clamping devices 300 for clamping the automotive parts are fixedly mounted at the adjustment ends of the transverse adjustment device 200. A support device 400 is provided on the workbench 100, positioned between the two sets of clamping devices 300, to support the welding position. During welding, the clamping devices 300 on either side clamp and secure the two automotive parts, while the support device 400 in the middle provides auxiliary support for the welding position. This ensures the stability of the workpiece and the quality of the weld during the welding process.

[0034] The lateral adjustment device 200 includes an installation shell 210 fixed on the workbench 100, and a bidirectional screw rod 220 is rotatably connected to the installation shell 210. The bidirectional screw rod 220 passes through the installation shell 210, and is rotatably connected to a support base 230 at both ends. The support base 230 is fixedly installed on the workbench 100.

[0035] Two first guide posts 240 are fixedly mounted between the workbench 100 and each support base 230. The length of the first guide posts 240 is parallel to the bidirectional screw 220. A mounting platform 250 is slidably mounted on the first guide posts 240 and is threadedly connected to the bidirectional screw 220. A clamping device 300 is mounted on the upper side of the mounting platform 250. A drive assembly 270 is mounted on the mounting housing 210 to control the rotation of the bidirectional screw 220. Locking assemblies 260 are provided at both ends of the mounting platform 250 to lock with the first guide posts 240. After adjusting the position, the locking assembly 260 locks the mounting platform 250, thereby ensuring that the mounting platform 250 does not move.

[0036] The mounting platform 250 defines a first guide hole 251 therethrough, and the first guide post 240 passes through the first guide hole 251 .

[0037] The locking assembly 260 includes a locking sleeve 261 fixed to both ends of the workbench 100 and located outside the first guide hole 251 , and a locking tube 262 connected to the locking sleeve 261 .

[0038] The locking sleeve 261 is sleeved on the outside of the first guide column 240; a truncated cone-shaped locking cavity section 2611 is formed in the locking sleeve 261 and at one end close to the workbench 100, and a threaded cavity section 2612 is formed at one end of the locking sleeve 261 away from the workbench 100.

[0039] An operating sleeve 2621 is integrally formed at one end of the locking tube 262. A plurality of elastic pieces 2622 are circumferentially spaced apart at the other end of the locking tube 262. The operating sleeve 2621 is threadedly connected to the threaded cavity section 2612. The diameter of the circle formed by the elastic pieces 2622 is smaller than the inner diameter of the threads of the locking tube 262. When the elastic pieces 2622 abut within the locking cavity section 2611, they abut and securely engage the first guide post 240.

[0040] A mounting cavity 211 is formed within the mounting housing 210; a bidirectional screw 220 passes through the mounting cavity 211; a drive assembly 270 includes a driven gear 271 fixed to the bidirectional screw 220; a drive shaft 272 is rotatably connected to the mounting housing 210 and located on one side of the bidirectional screw 220; one end of the drive shaft 272 is located outside the mounting housing 210 and is connected to a control wheel 273; a driving gear 274 is fixedly mounted on the drive shaft 272 and located within the mounting cavity 211, and meshes with the driven gear 271. During use, the bidirectional screw 220 is rotated by controlling the control wheel, thereby driving the two mounting platforms 250 to move toward each other.

[0041] The clamping device 300 includes a support arm 310 fixed to the mounting platform 250. A horizontal support plate 320 is fixedly mounted on the upper side of the support arm 310. The support plate 320 supports the automotive component. A plurality of support assemblies 330 are arranged in an array on the support plate 320. The support assemblies 330 are vertically adjustable to support the automotive component. A clamping assembly 340 is located on the support arm 310 and above the support plate 320 to compress the upper side of the automotive component.

[0042] The support plate 320 is provided with a mounting hole 321 extending therethrough. The support assembly 330 includes a support sleeve 331 fixed below the support plate 320 and located outside the mounting hole 321. An adjustment screw 332 is internally threadedly connected to the support sleeve 331. The end of the adjustment screw 332 closest to the workbench 100 extends through the support sleeve 331 and is fixedly mounted with a first adjustment handwheel 333. A spherical surface 334 is formed on the end of the adjustment screw 332 away from the workbench 100. The maximum diameter of the spherical surface 334 is smaller than the inner diameter of the adjustment screw 332, allowing the spherical surface 334 to extend out of or into the support sleeve 331. By providing multiple support assemblies 330, various automotive parts of varying shapes can be supported.

[0043] The clamping assembly 340 includes a positioning frame 341 that is sleeved on the support arm 310, and a plurality of positioning holes 342 are spaced apart on the arm section of the support arm 310 and located above the support plate 320; a first positioning screw 343 is threadedly connected to the positioning frame 341, and the first positioning screw 343 is threadedly connected to the positioning hole 342.

[0044] A transverse positioning arm 344 is integrally grown on one side of the positioning frame 341 close to the supporting device 400, and a telescopic sleeve 345 is slidably connected to the outer side of the transverse positioning arm 344; a sliding hole is formed at one end of the telescopic sleeve 345, and is slidably connected to the transverse positioning arm 344 through the sliding hole, and a second positioning screw 3451 is threadedly connected to the outer side of the telescopic sleeve 345, and the second positioning screw 3451 passes through the telescopic sleeve 345 and presses against the transverse positioning arm 344.

[0045] A positioning bracket 346 is fixedly mounted on the end of the telescopic sleeve 345 away from the support arm 310. Positioning bracket 346 is arranged horizontally and includes a transverse mounting plate 3461 and a longitudinal mounting plate 3462. Multiple longitudinal mounting brackets are spaced apart, and locking holes are evenly spaced in each of the transverse and longitudinal mounting plates 3461 and 3462. Each locking hole is threadedly connected to a locking screw 347. One end of the locking screw 347 passes through the locking hole and is located below the positioning bracket 346, where a rubber sleeve 348 is fixed. The other end is located above the positioning bracket 346 and fixedly mounted with a handle 349. During operation, the position of the locking screw 347, and therefore the vertical height of each rubber sleeve 348, is adjusted by controlling the handle 349 to tighten and secure the workpiece.

[0046] The supporting device 400 includes a supporting frame 410 fixed on the workbench 100, and the supporting frame 410 is located directly above the mounting shell 210. Vertical second guide columns 420 are installed at intervals on the supporting frame 410. The lower ends of the second guide columns 420 are respectively fixed on the workbench 100 and the supporting frame 410, and the upper ends are located above the supporting frame 410; a guide sleeve 430 is slidably connected to the upper end of the second guide column 420.

[0047] The end of the guide sleeve 430 away from the support frame 410 is fixedly connected to a transverse plate 440. The transverse plate 440 is arranged horizontally, and its length direction is perpendicular to the length direction of the bidirectional screw rod 220. During welding, the position of the welding seam is set to a position parallel to the length direction of the transverse plate 440.

[0048] The transverse plate 440 is located between the two second guide posts 420 and has a jacking block fixedly mounted on one side of the support frame 410. A lifting member 460 is fixedly mounted on the support frame 410. The telescopic end of the lifting member 460 is connected to the jacking block and controls the vertical movement of the transverse plate 440. The lifting member 460 may be a jack.

[0049] A plurality of support assemblies 470 are provided at intervals along the length direction of the transverse plate 440 to support the welding positions. The support assemblies 470 are supported by contact with the welding positions.

[0050] Two groups of second guide holes 441 are defined on the transverse plate 440 at intervals along the width direction. An adjustment hole 442 is defined on the transverse plate 440 and located between the two groups of second guide holes 441 .

[0051] Support assembly 470 includes a lifting screw 471 that is rotatably connected to adjustment hole 442. A lifting sleeve 472 is disposed on the upper side of transverse plate 440. L-shaped guide rods 473 are fixed to either side of lifting sleeve 472 near second guide hole 441. L-shaped guide rods 473 are slidably connected to second guide hole 441. One end of lifting screw 471 is located on the upper side of transverse plate 440 and is threadedly connected to lifting sleeve 472. The other end is located on the lower side of transverse plate 440 and is connected to a second adjustment handwheel 474. Rotating lifting screw 471 using the adjustment handwheel controls the vertical movement of lifting sleeve 472.

[0052] A Y-shaped bracket 475 is detachably connected to the upper side of the lifting sleeve 472, and the two ends of the Y-shaped bracket 475 respectively abut the automotive accessories on both sides of the weld seam. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "front", "rear", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, they cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0053] In the description of the present invention, it should be noted that, unless otherwise clearly specified or limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, or internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. In the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0054] The above-described embodiments merely illustrate the implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A welding tooling fixture for automotive parts, characterized in that: It includes a workbench (100), and a lateral adjustment device (200) is fixedly installed on the upper side of the workbench (100); On the adjustment ends of the lateral adjustment device (200), a set of clamping devices (300) for clamping automotive parts are fixedly installed respectively; on the workbench (100) and between the two sets of clamping devices (300), a support device (400) for supporting the welding position is arranged.

2. The fixture for welding automotive parts according to claim 1, wherein: The lateral adjustment device (200) includes an installation housing (210) fixed to the workbench (100); A bidirectional lead screw (220) is rotatably connected to the installation housing (210), the bidirectional lead screw (220) passes through the installation housing (210), and both ends are respectively rotatably connected to a support seat (230), and the support seat (230) is fixedly installed on the workbench (100); Two first guiding columns (240) are fixedly installed between the workbench (100) and each support seat (230), and the length direction of the first guiding column (240) is parallel to the bidirectional lead screw (220); An installation table (250) is slidably arranged on the first guiding column (240), and the installation table (250) is threadedly connected to the bidirectional lead screw (220); the clamping device (300) is installed on the upper side of the installation table (250); a driving component (270) for controlling the rotation of the bidirectional lead screw (220) is arranged on the installation housing (210); Locking components (260) for locking with the first guiding column (240) are arranged at both ends of the installation table (250).

3. The fixture for welding automotive parts according to claim 2, wherein: A through first guiding hole (251) is formed on the installation table (250), and the first guiding column (240) passes through the first guiding hole (251); The locking component (260) includes a locking sleeve (261) fixed to both ends of the workbench (100) and located outside the first guiding hole (251) and a locking tube (262) connected to the locking sleeve (261); The locking sleeve (261) is sleeved outside the first guiding column (240); A frustum-shaped locking cavity section (2611) is formed at one end of the locking sleeve (261) close to the workbench (100), and a threaded cavity section (2612) is formed at the end of the locking sleeve (261) far from the workbench (100); One end of the locking tube (262) forms an operation sleeve (2621), and a plurality of elastic pieces (2622) are arranged at intervals along the circumferential direction at the other end of the locking tube (262), and the operation sleeve (2621) is threadedly connected to the threaded cavity section (2612); The diameter of the circle formed by enclosing the plurality of elastic pieces (2622) is smaller than the threaded inner diameter of the locking tube (262); when the elastic pieces (2622) abut against the locking cavity section (2611), the elastic pieces (2622) abut against the first guiding column (240).

4. The welding tooling fixture for automotive parts according to claim 2, characterized in that: An installation cavity (211) is formed inside the installation housing (210); the bidirectional lead screw (220) passes through the installation cavity (211); The driving assembly (270) includes a driven gear (271) fixed on the bidirectional lead screw (220), and a driving shaft (272) is rotatably connected to the installation housing (210) and on one side of the bidirectional lead screw (220); One end of the driving shaft (272) is located outside the installation housing (210) and is connected with a control wheel (273); A driving gear (274) is fixedly installed on the driving shaft (272) and inside the installation cavity (211), and the driving gear (274) meshes with the driven gear (271).

5. The fixture for welding automotive parts according to claim 2, wherein: The clamping device (300) includes a support arm (310) fixed on the installation table (250), a horizontal support plate (320) is fixedly installed on the upper side of the support arm (310), and the support plate (320) supports the auto parts; A plurality of support components (330) are arranged in an array on the support plate (320), and the support components (330) adjust the height in the vertical direction to support the auto parts; A pressing component (340) for pressing the upper side of the auto parts is arranged on the support arm (310) and above the support plate (320).

6. The welding tooling fixture for automotive parts according to claim 5, characterized in that: A through installation hole (321) is formed in the support plate (320); The support component (330) includes a support sleeve (331) fixed below the support plate (320) and outside the installation hole (321); An adjusting screw rod (332) is threadedly connected inside the support sleeve (331), one end of the adjusting screw rod (332) close to the workbench (100) passes out of the support sleeve (331) and is fixedly installed with a first adjusting handwheel (333), a spherical surface (334) is formed at the end of the adjusting screw rod (332) far from the workbench (100), the maximum diameter of the spherical surface (334) is smaller than the inner diameter of the adjusting screw rod (332), and the spherical surface (334) can pass in or out of the support sleeve (331).

7. The fixture for welding automotive parts according to claim 5, characterized in that: The pressing component (340) includes a positioning frame (341) sleeved on the support arm (310), and a plurality of positioning holes (342) are spaced apart on the arm section of the support arm (310) and above the support plate (320); a first positioning screw rod (343) is threadedly connected to the positioning frame (341), and the first positioning screw rod (343) is threadedly connected to the positioning holes (342); A transverse positioning arm (344) is integrally formed on one side surface of the positioning frame (341) close to the support device (400), and a telescopic sleeve (345) is slidably connected to the outside of the transverse positioning arm (344); One end of the telescopic sleeve (345) is formed with a sliding hole, and is slidably connected to the lateral positioning arm (344) through the sliding hole. A positioning frame (346) is fixedly installed at the end of the telescopic sleeve (345) away from the support arm (310). A second positioning screw (3451) is threadedly connected to the outside of the telescopic sleeve (345). The second positioning screw (3451) passes through the telescopic sleeve (345) and abuts against the lateral positioning arm (344). The positioning frame (346) is horizontally arranged and includes a lateral mounting plate (3461) and a longitudinal mounting plate (3462). A plurality of locking holes are evenly spaced on the lateral mounting plate (3461) and the longitudinal mounting plate (3462). A locking screw (347) is threadedly connected to each locking hole. One end of the locking screw (347) passes through the locking hole and is located below the positioning frame (346), and is fixed with a rubber sleeve (348). The other end is located above the positioning frame (346), and is fixedly installed with a handle (349).

8. The welding fixture for automotive parts according to claim 2, characterized in that: The support device (400) includes a support frame (410) fixed to the workbench (100). The support frame (410) is located directly above the installation housing (210). Vertically arranged second guide posts (420) are spaced and installed on the support frame (410). The lower ends of the second guide posts (420) are respectively fixed to the workbench (100) and the support frame (410), and the upper ends are located above the support frame (410). A guide sleeve (430) is slidably connected to the upper ends of the second guide posts (420). One end of the guide sleeve (430) away from the support frame (410) is fixedly connected to a transverse plate (440). The transverse plate (440) is horizontally arranged, and the length direction is perpendicular to the length direction of the bidirectional lead screw (220). The transverse plate (440) is located between two second guide posts (420), and a jacking block is fixedly arranged on the side surface close to the support frame (410). A lifting member (460) is fixedly installed on the support frame (410), and the telescopic end of the lifting member (460) is connected to the jacking block. A plurality of support components (470) for supporting at the welding seam positions are arranged at intervals in the length direction of the transverse plate (440).

9. The fixture for welding automotive parts according to claim 8, characterized in that: Two groups of second guide holes (441) are spaced apart in the width direction on the transverse plate (440). An adjustment hole (442) is arranged on the transverse plate (440) and between the two groups of second guide holes (441). The support component (470) includes a lifting screw (471) rotatably connected to the adjustment hole (442). A lifting sleeve (472) is arranged on the upper side of the transverse plate (440). On both sides of the lifting sleeve (472) close to the second guide hole (441), L-shaped guide rods (473) are respectively fixed. The L-shaped guide rods (473) are slidably connected to the second guide hole (441). One end of the lifting screw rod (471) is located above the transverse plate (440) and is threadedly connected to the lifting sleeve (472), and the other end is located below the transverse plate (440) and is connected with a second adjusting handwheel (474); A Y-shaped bracket (475) is detachably connected to the upper side of the lifting sleeve (472), and the two ends of the Y-shaped bracket (475) respectively abut against the auto parts on both sides of the welding seam.

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