A welding fixture for an automotive instrument crossbeam assembly

Abstract

The present invention provides an automotive instrument crossbeam assembly welding fixture, belonging to the technical field of automotive parts production equipment, including a bottom plate. At both ends and in the middle of the bottom plate, there are multiple groups of crossbeam clamping and positioning units, and the crossbeam is fixed on the bottom plate through the crossbeam clamping and positioning units; on both sides of one side of the bottom plate, there are respectively arranged a water trough bracket clamping and positioning unit and a fuse box mounting bracket clamping and positioning unit, and on both sides of the other side of the bottom plate, there are respectively arranged a wire harness fixing bracket clamping and positioning unit and an electrical module mounting bracket positioning and clamping unit. A clamping mechanism is arranged on the clamping arm, and the mounting bracket is clamped and fixed on the clamping arm through the clamping mechanism, and then the clamped mounting bracket is fixed on the crossbeam through the clamping arm for welding, greatly improving the stability of clamping and welding, reducing the sliding offset during the welding process, and greatly improving the welding effect.

Description

Technical Field

[0001] The present invention relates to the technical field of automotive parts manufacturing equipment, and particularly to a welding fixture for an automotive instrument crossbeam assembly. Background Art

[0002] The instrument crossbeam assembly is a main component of the automotive interior and exterior trim system. Its structure generally consists of a series of thick and thin pipe beams welded together, and then multiple module mounting brackets are welded to the pipe beams, enabling multiple modules on the vehicle to be mounted on the instrument crossbeam. With the current trend of "vehicle connecting everything, everything interconnected", the more functions a vehicle has, the more control modules there are. The instrument crossbeam is the carrier closest to the human-machine functional area. Therefore, multiple modules will be mounted on the instrument crossbeam assembly, and the performance requirements, dimensional requirements, and assembly requirements for the instrument crossbeam are constantly increasing. These conditions make the manufacturing process of the instrument crossbeam assembly extremely difficult and the process cannot be effectively controlled.

[0003] Patent No. CN203936549U discloses a welding fixture for the middle part of an automotive instrument panel crossbeam. On the left and right ends above the base, positioning and clamping frames are symmetrically installed respectively for clamping and positioning the left and right side bracket assemblies of the crossbeam; in the middle of the front side of the base, there are symmetrically arranged front clamping devices for the middle bracket to position and clamp the front ends of the left and right middle bracket assemblies; in the middle of the rear side of the base, there are symmetrically arranged positioning and clamping devices for clamping and positioning the air duct mounting bracket; between the positioning and clamping devices, there is an IP body middle upper mounting bracket assembly fixture, and symmetrically arranged middle clamping and positioning devices are provided between the positioning and clamping devices and the front clamping devices for the middle bracket to clamp and position the middle parts of the left and right middle bracket assemblies. There is an IP body lower right mounting bracket assembly fixture between the left middle clamping and positioning device and the front clamping device for the middle bracket, and an IP body middle mounting bracket assembly fixture is provided behind between the front clamping devices for the middle bracket. A fitting clamping device is fixedly installed in the middle of the right side of the base. By using multiple clamping devices to position and clamp each component, the crossbeam can be positioned and welded more stably and precisely, improving the welding quality.

[0004] However, existing positioning fixtures directly place the welding components on the surface of the crossbeam, and then use the fixture to clamp and fix the fittings on the surface of the crossbeam for positioning welding. However, the surface of the crossbeam is an arc-shaped structure, and it is easy for the welding components to slide and shift when clamped and fixed on the surface of the crossbeam, resulting in inaccurate clamping positions of the welding components, thereby affecting the positioning welding effect and the product quality. Summary of the Invention

[0005] The object of the present invention is to provide a welding fixture for an automotive instrument crossbeam assembly. By arranging a clamping mechanism on the clamping arm to clamp the mounting bracket, and then fitting and fixing the clamped mounting mechanism on the surface of the crossbeam, the stability of clamping and fixing the mounting bracket is reduced, the shaking and offset are reduced, and the problem of unstable clamping of the bracket on the surface of the crossbeam in the background art is solved.

[0006] The present invention provides a welding fixture for an automotive instrument crossbeam assembly, which includes a bottom plate. Multiple crossbeam clamping and positioning units are provided at both ends and in the middle of the bottom plate, and the crossbeam is fixed on the bottom plate through the crossbeam clamping and positioning units; on both sides of one side of the bottom plate, a water trough bracket clamping and positioning unit and a fuse box mounting bracket clamping and positioning unit are respectively arranged, and on both sides of the other side of the bottom plate, a wire harness fixing bracket clamping and positioning unit and an electrical module mounting bracket positioning and clamping unit are respectively arranged;

[0007] The wire harness fixing bracket clamping and positioning unit includes a bracket five installed on the bottom plate. A clamping arm four is rotatably installed at the upper end of the bracket five, and a cylinder fourteen is installed at the outer end of the bracket five. The output end of the cylinder fourteen is connected to the clamping arm four; a clamping mechanism one is provided at the end of the clamping arm four, and the wire harness fixing bracket is clamped and fixed on the clamping arm four through the clamping mechanism one;

[0008] The electrical module mounting bracket positioning and clamping unit includes a bracket six installed on the bottom plate. A clamping arm six is rotatably connected to the upper end of the bracket six, and a cylinder eleven is installed on the outer side edge of the bracket six. The output end of the cylinder eleven is connected to the clamping arm six; a clamping mechanism two is provided at the end of the clamping arm six, and the electrical module mounting bracket is clamped and fixed on the clamping arm six through the clamping mechanism two.

[0009] A further improvement lies in that: the crossbeam clamping and positioning unit includes a bracket one installed on the bottom plate. A support block one is provided inside the bracket one, a clamping arm one is rotatably connected to the upper end of the bracket one, a cylinder one is installed outside the bracket one, and the output end of the cylinder one is connected to the end of the clamping arm one. The crossbeam is placed and positioned through the support block one on the lower side, and the cylinder one drives the clamping arm one to clamp the crossbeam.

[0010] A further improvement lies in that: the fuse box mounting bracket clamping and positioning unit includes a bracket two installed on the bottom plate. A support block two is provided inside the side of the bracket two, a cylinder two is installed at the lower end of the outer side of the side of the bracket two, a clamping arm two is rotatably installed at the upper end of the outer side of the side of the bracket two, and the output end of the cylinder two is connected to the end of the clamping arm two.

[0011] A further improvement lies in that: a cylinder three is provided below the support block two, a positioning pin one is movably arranged inside the support block two, and the output end of the cylinder three is connected to the positioning pin one. The positioning pin one is driven by the cylinder three to extend out of the support block two for positioning.

[0012] The further improvement lies in that: the clamping and positioning unit of the water chute bracket includes bracket three and bracket four installed on the bottom plate. Bracket three and bracket four are respectively arranged on both sides of the cross beam. A sliding block is slidably arranged on the side of bracket three through a slide rail. A positioning pin two is arranged at the upper end of the sliding block. A cylinder four is installed outside bracket three, and the output end of cylinder four is connected to the sliding block. A fixed block with a groove on its surface is movably arranged inside the sliding block. A cylinder five is installed outside the sliding block, and the output end of cylinder five is connected to the fixed block; A support block three is installed on the lower side of bracket three. A clamping arm three is rotatably connected to the side of support block three. A cylinder six is arranged at the lower end of the side of support block three, and the output end of cylinder six is connected to clamping arm three; A support block four is installed on the side of bracket four, and a positioning block is arranged on support block four.

[0013] The further improvement lies in that: a positioning pin three is movably arranged inside the support block three. A cylinder seven is arranged at the lower side of support block three, and the output end of cylinder seven is connected to the positioning pin three; A cylinder eight is installed on support block four, and a positioning pin four is installed at the output end of cylinder eight.

[0014] The further improvement lies in that: the clamping mechanism one includes a clamping block one, which is arranged at the end of the clamping arm four. A clamping arm five is rotatably connected to the end of the clamping block one. A cylinder nine is installed on the upper side of the end of the clamping block one, and the output end of cylinder nine is connected to the clamping arm five.

[0015] The further improvement lies in that: a positioning pin five is movably arranged inside the clamping block one. A cylinder ten is installed at the upper end of the clamping block one, and the output end of cylinder ten is connected to the positioning pin five.

[0016] The further improvement lies in that: the clamping mechanism two includes a clamping block two, which is installed at the end of bracket six. A clamping arm seven is rotatably connected to the side of bracket six. A cylinder twelve is installed on the upper side of bracket six, and the output end of cylinder twelve is connected to the clamping arm seven through a linkage rod.

[0017] The further improvement lies in that: a positioning pin six is movably arranged inside the clamping block two. A cylinder thirteen is arranged on the upper side of the clamping block two, and the output end of cylinder thirteen is connected to the positioning pin six.

[0018] The beneficial effects of the present invention are as follows: 1. In the present invention, a clamping mechanism is arranged on the clamping arm to clamp and fix the mounting bracket, making the clamping of the mounting bracket more stable; By setting a clamping block for the fitting placement of the mounting bracket, and then separately setting a small clamping arm on the clamping block, the mounting bracket is fixed on the clamping block through the small clamping arm, so that the mounting bracket is fixed on the large clamping arm, forming an integral body with the large clamping arm, and then the mounting bracket is clamped and fixed on the surface of the cross beam through the large clamping arm; Through the double clamping of the mounting bracket, the clamping stability is greatly improved, the shaking and deviation during the clamping process are reduced, the welding stability is improved, and the welding quality is improved.

[0019] 2. By providing positioning pins on the support block and the clamping block, the present invention enables the positioning pins to expand and contract driven by a cylinder. The positioning pins are used to position the placed mounting bracket, improving the accuracy of positioning and fitting the mounting bracket with the crossbeam. Moreover, by positioning and clamping with the positioning pins, the shaking and deviation of the mounting bracket during the clamping and welding process are reduced, greatly enhancing the clamping stability, improving the welding accuracy, and enhancing the welding quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural view of the present invention.

[0021] Figure 2 is a schematic structural view of the crossbeam clamping and positioning unit.

[0022] Figure 3 is a schematic structural view of the mounting block in the water trough bracket clamping and positioning unit.

[0023] Figure 4 is a schematic structural view of the support block three in the water trough bracket clamping and positioning unit.

[0024] Figure 5 is a schematic structural view of the bracket four in the water trough bracket clamping and positioning unit.

[0025] Figure 6 is a schematic structural view of the fuse box mounting bracket clamping and positioning unit.

[0026] Figure 7 is a schematic structural view of the wire harness fixing bracket clamping and positioning unit.

[0027] Figure 8 is a schematic structural view of the positioning pin five.

[0028] Figure 9 is a schematic structural view of the electrical module mounting bracket positioning and clamping unit.

[0029] Figure 10 is a schematic structural view of the positioning pin six.

[0030] Wherein: 1. Bottom plate; 2. Crossbeam clamping and positioning unit; 21. First bracket; 22. First support block; 23. First clamping arm; 24. First cylinder; 3. Water chute bracket clamping and positioning unit; 31. Third bracket; 310. Mounting block; 311. Second positioning pin; 312. Fourth cylinder; 313. Fixed block; 314. Fifth cylinder; 315. Third support block; 316. Third clamping arm; 317. Sixth cylinder; 318. Third positioning pin; 319. Seventh cylinder; 32. Fourth bracket; 321. Fourth support block; 322. Positioning block; 323. Eighth cylinder; 324. Fourth positioning pin; 4. Fuse box mounting bracket clamping and positioning unit; 41. Second bracket; 42. Second support block; 43. Second cylinder; 44. Second clamping arm; 45. First positioning pin; 46. Third cylinder; 5. Wiring harness fixing bracket clamping and positioning unit; 51. Fifth bracket; 52. Fourth clamping arm; 53. Fourteenth cylinder; 54. First clamping block; 55. Fifth clamping arm; 56. Ninth cylinder; 57. Fifth positioning pin; 58. Tenth cylinder; 6. Electrical module mounting bracket positioning and clamping unit; 61. Sixth bracket; 62. Sixth clamping arm; 63. Eleventh cylinder; 64. Second clamping block; 65. Seventh clamping arm; 66. Twelfth cylinder; 67. Sixth positioning pin; 68. Thirteenth cylinder. Specific implementation mode

[0031] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.

[0032] As Figure 1-5 shown, this embodiment provides a welding fixture for an automotive instrument crossbeam assembly, including a bottom plate 1. Multiple groups of crossbeam clamping and positioning units 2 are provided at both ends and in the middle of the bottom plate 1, and the crossbeam is fixed on the bottom plate 1 through the crossbeam clamping and positioning units 2. The crossbeam clamping and positioning unit 2 includes a first bracket 21 installed on the bottom plate 1. A first support block 22 is provided inside the first bracket 21. The upper end of the first bracket 21 is rotatably connected to a first clamping arm 23. A first cylinder 24 is installed outside the first bracket 21. The output end of the first cylinder 24 is hinged to the end of the first clamping arm 23. The first clamping arm 23 rotates on the first bracket 21 driven by the first cylinder 24. The crossbeam is placed on the first support block 22. The first cylinder 24 drives the first clamping arm 23 to flip on the first bracket, and the first clamping arm 23 and the first support block 22 clamp and fix the crossbeam from the upper and lower sides respectively.

[0033] On both sides of one side of the bottom plate 1, a water chute bracket clamping and positioning unit 3 and a fuse box mounting bracket clamping and positioning unit 4 are respectively provided.

[0034] The clamping and positioning unit 4 of the fuse box mounting bracket includes a second bracket 41 mounted on the bottom plate 1. On the inner side of the side of the second bracket 41, there is a second support block 42. At the lower end of the outer side of the side of the second bracket 41, a second cylinder 43 is mounted. At the upper end of the outer side of the side of the second bracket 41, a second clamping arm 44 is rotatably mounted. The output end of the second cylinder 43 is hinged to the end of the second clamping arm 44. The second clamping arm 44 is driven by the second cylinder 43 to rotate on the second bracket 41. There is a third cylinder 46 on the lower side of the second support block 42. A first positioning pin 45 is movably arranged in the second support block 42. The output end of the third cylinder 46 is connected to the first positioning pin 45. The first positioning pin 45 is driven by the third cylinder 46 to extend out of the second support block 42 for positioning. One end of the fuse box mounting bracket is placed on the second support block 42. The third cylinder 46 drives the first positioning pin 45 to extend out of the second support block 42 to position the placement position of the fuse box mounting bracket. Then, the second cylinder 43 drives the second clamping arm 44 to press and fix the other end of the fuse box mounting bracket on the cross beam, facilitating the stable welding of the fuse box mounting bracket and the cross beam.

[0035] The clamping and positioning unit 3 of the water trough bracket includes a third bracket 31 and a fourth bracket 32 mounted on the bottom plate 1. The third bracket 31 and the fourth bracket 32 are respectively arranged on both sides of the cross beam. The water trough bracket is placed between the third bracket 31 and the fourth bracket 32 and fits on the cross beam. On the side of the third bracket 31, an installation block 310 is slidably arranged through a slide rail. At the upper end of the installation block 310, there is a second positioning pin 311. A fourth cylinder 312 is mounted on the outside of the third bracket 31. The output end of the fourth cylinder 312 is connected to the installation block 310. The installation block 310 is pushed by the fourth cylinder 312 to move on the third bracket 31 and fit onto the surface of one side of the water trough bracket. The second positioning pin 311 is inserted into the water trough bracket for positioning as the installation block 310 moves. A fixing block 313 with a groove on its surface is movably arranged in the installation block 310. A fifth cylinder 314 is mounted on the outside of the installation block 310. The output end of the fifth cylinder 314 is connected to the fixing block 313. The fifth cylinder 314 drives the fixing block 313 to retract into the installation block 310, and fixes one side of the water trough bracket on the side surface of the installation block 310 through the groove on the fixing block 313.

[0036] On the lower side edge of the third support 31, there is a third support block 315. The lower end of the water trough support is placed and supported by the third support block 315. A third positioning pin 318 is movably arranged in the third support block 315. There is a seventh cylinder 319 below the third support block 315. The output end of the seventh cylinder 319 is connected to the third positioning pin 318. The seventh cylinder 319 drives the third positioning pin 318 to extend out of the third support block 315 to position the water trough support placed on the third support block 315. A third clamping arm 316 is rotatably connected to the side of the third support block 315. There is a sixth cylinder 317 at the lower end of the side of the third support block 315. The output end of the sixth cylinder 317 is hinged to the end of the third clamping arm 316. The third clamping arm 316 is driven to rotate by the sixth cylinder 317 to clamp and fix a part of the water trough support placed on the third support block 315.

[0037] On the side of the fourth support 32, there is a fourth support block 321. The other side of the water trough support is placed on the fourth support block 321. There is a positioning block 322 on the fourth support block 321 to position the uniquely placed part through the positioning block 322. An eighth cylinder 323 is installed on the fourth support block 321. A fourth positioning pin 324 is installed on the output end of the eighth cylinder 323. The eighth cylinder 323 drives the fourth positioning pin 324 to extend out to position a part of the water trough support placed on the fourth support block 321.

[0038] On both sides of the other side of the bottom plate 1, a wire harness fixing bracket clamping and positioning unit 5 and an electrical module mounting bracket positioning and clamping unit 6 are respectively arranged.

[0039] The wire harness fixing bracket clamping and positioning unit 5 includes a fifth bracket 51 installed on the bottom plate 1. A fourth clamping arm 52 is rotatably installed at the upper end of the fifth bracket 51. A fourteenth cylinder 53 is installed at the outer end of the fifth bracket 51. The output end of the fourteenth cylinder 53 is hinged to the fourth clamping arm 52. The fourth clamping arm 52 is driven to rotate on the fifth bracket 51 by the fourteenth cylinder 53. A first clamping mechanism is provided at the end of the fourth clamping arm 52 to clamp and fix the wire harness fixing bracket on the fourth clamping arm 52 through the first clamping mechanism.

[0040] The first clamping mechanism includes a first clamping block 54. The first clamping block 54 is arranged at the end of the fourth clamping arm 52. The end of the first clamping block 54 is rotatably connected to a fifth clamping arm 55. An eighth cylinder 56 is installed on the upper side of the end of the first clamping block 54. The output end of the eighth cylinder 56 is hinged to the fifth clamping arm 55. The fifth clamping arm 55 is driven by the eighth cylinder 56 to turn over. A fifth positioning pin 57 is movably arranged in the first clamping block 54. A ninth cylinder 58 is installed at the upper end of the first clamping block 54. The output end of the ninth cylinder 58 is connected to the fifth positioning pin 57. By attaching the wire harness fixing bracket to the lower side of the first clamping block 54, the ninth cylinder 58 drives the fifth positioning pin 57 to extend out of the first clamping block 54 to position the placement of the wire harness fixing bracket. The eighth cylinder 56 drives the fifth clamping arm 55 to clamp and fix the wire harness fixing bracket, so that the wire harness fixing bracket is fixed on the lower side of the first clamping block 54. Then, the fourteenth cylinder 53 drives the fourth clamping arm 52 to turn over on the fifth bracket 51, so that the wire harness fixing bracket turns over and fits on the cross beam, which is convenient for the stable welding of the wire harness fixing bracket and the cross beam.

[0041] The positioning and clamping unit 6 of the electrical module mounting bracket includes a sixth bracket 61 installed on the base plate 1. The upper end of the sixth bracket 61 is rotatably connected to a sixth clamping arm 62. An eleventh cylinder 63 is installed on the outer side edge of the sixth bracket 61. The output end of the eleventh cylinder 63 is hinged to the sixth clamping arm 62. The sixth clamping arm 62 is driven by the eleventh cylinder 63 to rotate on the sixth bracket 61. A second clamping mechanism is provided at the end of the sixth clamping arm 62. The electrical module mounting bracket is clamped and fixed on the sixth clamping arm 62 through the second clamping mechanism. The second clamping mechanism includes a second clamping block 64. The second clamping block 64 is installed at the end of the sixth bracket 61. A seventh clamping arm 65 is rotatably connected to the side of the sixth bracket 61. A twelfth cylinder 66 is installed on the upper side of the sixth bracket 61. The output end of the twelfth cylinder 66 is hinged to the seventh clamping arm 65 through a linkage rod. The seventh clamping arm 65 is driven by the twelfth cylinder 66 to turn over. A sixth positioning pin 67 is movably arranged in the second clamping block 64. A thirteenth cylinder 68 is provided on the upper side of the second clamping block 64. The output end of the thirteenth cylinder 68 is connected to the sixth positioning pin 67. By placing the electrical module mounting bracket on the lower side of the second clamping block 64, the sixth positioning pin 67 is driven by the thirteenth cylinder 68 to extend out of the second clamping block 64 to position the placement of the electrical module mounting bracket. The twelfth cylinder 66 drives the seventh clamping arm 65 to clamp and fix the electrical module mounting bracket, so that the electrical module mounting bracket is clamped and fixed between the second clamping block 64 and the seventh clamping arm 65. The eleventh cylinder 63 drives the sixth clamping arm 62 to turn over on the sixth bracket 61, so that the electrical module mounting bracket turns over and fits on the cross beam, which is convenient for the subsequent stable welding between the electrical module mounting bracket and the cross beam.

[0042] During actual use, the cross beam is placed on the first support block 22, and the first cylinder 24 drives the first clamping arm to rotate to clamp and fix the cross beam.

[0043] Place the fuse box mounting bracket on the second support block 42. The third cylinder 46 drives the first positioning pin 45 to extend for positioning, and the second cylinder 43 drives the second clamping arm 44 to clamp and fix the fuse box mounting bracket on the surface of the crossbeam.

[0044] Place the water chute bracket under the crossbeam and fit it on the surface of the crossbeam. Place the lower end of the water chute bracket on the third support block 315. The seventh cylinder 319 drives the third positioning pin 318 for positioning, and the sixth cylinder 317 drives the third clamping arm 316 to rotate for clamping; one side of the water chute bracket abuts against the mounting block 310, and the second positioning pin 311 is used for positioning. The fifth cylinder 314 drives the fixing block 313 to clamp and fix the water chute bracket on the surface of the mounting block 310; the other side of the water chute bracket is positioned on the fourth support block 321 through the positioning block 322, and the eighth cylinder 323 drives the fourth positioning pin 324 to extend for positioning, so that the water chute bracket is stably clamped and fitted on the surface of the crossbeam.

[0045] Fit the wire harness fixing bracket on the surface of the first clamping block 54. The tenth cylinder 58 drives the fifth positioning pin 57 to extend for positioning, and the ninth cylinder 56 drives the fifth clamping arm 55 to rotate to clamp and fix the wire harness fixing bracket; then, the fourteenth cylinder 53 drives the fourth clamping arm 52 to rotate, so that the wire harness fixing bracket fits on the surface of the crossbeam.

[0046] Fit the electrical module mounting bracket on the surface of the second clamping block 64. The thirteenth cylinder 68 drives the sixth positioning pin 67 to extend for positioning, and the twelfth cylinder 66 drives the seventh clamping arm 65 to rotate for clamping; then, the eleventh cylinder 63 drives the sixth clamping arm 62 to rotate, so that the electrical module mounting bracket fits on the surface of the crossbeam.

[0047] After successively fitting and clamping each mounting bracket on the surface of the crossbeam, the welding process between the bracket and the crossbeam can be carried out.

Claims

1. An automotive instrument crossbeam assembly welding fixture, comprising a bottom plate (1). Multiple groups of crossbeam clamping and positioning units (2) are provided at both ends and in the middle of the bottom plate (1), and the crossbeam is fixed to the bottom plate (1) through the crossbeam clamping and positioning units (2); on both sides of one side of the bottom plate (1), a water channel bracket clamping and positioning unit (3) and a fuse box mounting bracket clamping and positioning unit (4) are respectively arranged, and on both sides of the other side of the bottom plate (1), a wire harness fixing bracket clamping and positioning unit (5) and an electrical module mounting bracket positioning and clamping unit (6) are respectively arranged; characterized in that: The clamping and positioning unit (5) of the wire harness fixing bracket includes a fifth bracket (51) installed on the bottom plate (1). A fourth clamping arm (52) is rotatably installed at the upper end of the fifth bracket (51). A fourteenth cylinder (53) is installed at the outer end of the fifth bracket (51), and the output end of the fourteenth cylinder (53) is connected to the fourth clamping arm (52). A first clamping mechanism is provided at the end of the fourth clamping arm (52), and the wire harness fixing bracket is clamped and fixed on the fourth clamping arm (52) through the first clamping mechanism. The positioning and clamping unit (6) of the electrical module installation bracket includes a sixth bracket (61) installed on the bottom plate (1). A sixth clamping arm (62) is rotatably connected to the upper end of the sixth bracket (61). An eleventh cylinder (63) is installed on the outer side edge of the sixth bracket (61), and the output end of the eleventh cylinder (63) is connected to the sixth clamping arm (62). A second clamping mechanism is provided at the end of the sixth clamping arm (62), and the electrical module installation bracket is clamped and fixed on the sixth clamping arm (62) through the second clamping mechanism. The clamping and positioning unit (3) of the water trough bracket includes a third bracket (31) and a fourth bracket (32) installed on the bottom plate (1). The third bracket (31) and the fourth bracket (32) are respectively arranged on both sides of the cross beam. An installation block (310) is slidably arranged on the side of the third bracket (31) through a slide rail. A second positioning pin (311) is provided at the upper end of the installation block (310). A fourth cylinder (312) is installed outside the third bracket (31), and the output end of the fourth cylinder (312) is connected to the installation block (310). A fixing block (313) with a groove on its surface is movably arranged inside the installation block (310). A fifth cylinder (314) is installed outside the installation block (310), and the output end of the fifth cylinder (314) is connected to the fixing block (313). A third support block (315) is installed on the lower side edge of the third bracket (31). A third clamping arm (316) is rotatably connected to the side of the third support block (315). A sixth cylinder (317) is provided at the lower end of the side of the third support block (315), and the output end of the sixth cylinder (317) is connected to the third clamping arm (316). A fourth support block (321) is installed on the side of the fourth bracket (32), and a positioning block (322) is provided on the fourth support block (321).

2. The welding fixture for an automotive instrument crossbeam assembly according to claim 1, characterized in that: The clamping and positioning unit (2) of the cross beam includes a first bracket (21) installed on the bottom plate (1). A first support block (22) is provided inside the first bracket (21). A first clamping arm (23) is rotatably connected to the upper end of the first bracket (21). A first cylinder (24) is installed outside the first bracket (21), and the output end of the first cylinder (24) is connected to the end of the first clamping arm (23). The cross beam is placed and positioned through the first support block (22) on the lower side, and the first cylinder (24) drives the first clamping arm (23) to clamp the cross beam.

3. The welding fixture for an automotive instrument crossbeam assembly according to claim 1, characterized in that: The clamping and positioning unit (4) of the fuse box installation bracket includes a second bracket (41) installed on the bottom plate (1). A second support block (42) is provided inside the side of the second bracket (41). A second cylinder (43) is installed at the lower end of the outer side of the second bracket (41). A second clamping arm (44) is rotatably installed at the upper end of the outer side of the second bracket (41), and the output end of the second cylinder (43) is connected to the end of the second clamping arm (44).

4. The welding fixture for an automotive instrument crossbeam assembly according to claim 3, characterized in that: A cylinder three (46) is provided on the lower side of the support block two (42). A positioning pin one (45) is movably arranged in the support block two (42). The output end of the cylinder three (46) is connected to the positioning pin one (45). The positioning pin one (45) is driven by the cylinder three (46) to extend out of the support block two (42) for positioning.

5. The welding jig for an automotive instrument crossbeam assembly according to claim 1, wherein: A positioning pin three (318) is movably arranged in the support block three (315). A cylinder seven (319) is provided on the lower side of the support block three (315). The output end of the cylinder seven (319) is connected to the positioning pin three (318). A cylinder eight (323) is installed on the support block four (321). A positioning pin four (324) is installed on the output end of the cylinder eight (323).

6. The welding fixture for an automotive instrument crossbeam assembly according to claim 1, characterized in that: The clamping mechanism one includes a clamping block one (54). The clamping block one (54) is arranged at the end of the clamping arm four (52). The end of the clamping block one (54) is rotatably connected to a clamping arm five (55). A cylinder nine (56) is installed on the upper side of the end of the clamping block one (54). The output end of the cylinder nine (56) is connected to the clamping arm five (55).

7. The welding jig for the instrument crossbeam assembly of an automobile according to claim 6, characterized in that: A positioning pin five (57) is movably arranged in the clamping block one (54). A cylinder ten (58) is installed at the upper end of the clamping block one (54). The output end of the cylinder ten (58) is connected to the positioning pin five (57).

8. The welding fixture for an automotive instrument crossbeam assembly according to claim 1, wherein: The clamping mechanism two includes a clamping block two (64). The clamping block two (64) is installed at the end of the support bracket six (61). A clamping arm seven (65) is rotatably connected to the side of the support bracket six (61). A cylinder twelve (66) is installed on the upper side of the support bracket six (61). The output end of the cylinder twelve (66) is connected to the clamping arm seven (65) through a linkage rod.

9. The welding fixture for an automotive instrument crossbeam assembly according to claim 8, characterized in that: A positioning pin six (67) is movably arranged in the clamping block two (64). A cylinder thirteen (68) is provided on the upper side of the clamping block two (64). The output end of the cylinder thirteen (68) is connected to the positioning pin six (67).

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