Automobile part welding fixture

Abstract

The utility model provides a kind of automobile parts welding fixture tool, including first bottom plate and being set on first bottom plate first clamping device, second clamping device, third clamping device and fourth clamping device, the fourth clamping device includes fourth bottom plate, fourth drive mechanism and be set on fourth bottom plate fourth rotating arm, fourth locating block group, fourth bottom plate is detachably connected on first bottom plate, the output end of fourth drive mechanism is sequentially penetrated first bottom plate, fourth bottom plate and fourth rotating arm rotation connection after driving fourth rotating arm rotation, fourth rotating arm is fixed to the component of assembly with fourth locating block group cooperation;The utility model is welded when the large order quantity of component, then part clamp can be separated separately, simultaneously different process welding is realized, and welding process is accelerated, and welding efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of fixture technology, specifically to a welding fixture for automotive parts. Background Technology

[0002] In modern life, automobiles have become one of the most frequently used means of transportation. During the manufacturing process of automobiles, different parts need to be welded and assembled into modules. In the welding operation of automobile parts, fixtures are usually used to fix the parts. Through precise positioning and stable clamping, welding deformation and stress can be effectively controlled, ensuring that the position, angle and size of the weld meet the design requirements. At the same time, it can realize the rapid clamping and flipping of workpieces, reduce the amount of manual handling and positioning work, thereby improving welding quality, reducing labor intensity, increasing production efficiency and ensuring assembly accuracy.

[0003] For example, Chinese patent document No. 201822155352.0, published on August 16, 2019, discloses a novel clamp, including a first positioning mechanism, a transmission mechanism, a fixed base, and a drive mechanism. Rubber pads are installed at the four corners of the bottom of the fixed base, and noise-absorbing holes are provided at the edges of the fixed base. The first positioning mechanism is installed at the four corners of the top of the fixed base, and a base plate is installed on the fixed base between the first positioning mechanisms. The transmission mechanism is fixed at the top of the base plate, and a second positioning mechanism is installed at both ends of the top of the transmission mechanism.

[0004] The aforementioned document describes a system that uses a first positioning mechanism, a second positioning mechanism, a positioning point, a second hydraulic cylinder, a second frame, and a second base. The second hydraulic cylinder pushes the positioning point upwards, and the main component and auxiliary component are then placed on the positioning point to achieve product positioning, thereby improving the efficiency of the fixture. However, since the fixtures for both the main component and auxiliary component are mounted on the same base plate, when welding a large number of parts, workers responsible for different welding tasks cannot detach the fixtures individually for separate welding. Furthermore, due to the matrix arrangement of multiple fixtures, at least one side of one fixture may be blocked by other fixtures, making assembly impossible. Additionally, due to space constraints, one or more welding operators cannot simultaneously stand on one side of the auxiliary component fixture to operate on one side of the main component fixture to improve work efficiency. Utility Model Content

[0005] The purpose of this utility model is to provide a welding fixture for automotive parts, which enables welding workers to weld parts on the same base plate when welding small orders, reducing the transfer cost between individual processes; while when welding large orders, some fixtures can be separated to achieve welding of different processes at the same time, speeding up the welding process and improving welding efficiency.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a welding fixture for automotive parts, comprising a first base plate and a clamping mechanism disposed on the first base plate. The clamping mechanism includes two or more clamping devices for clamping and welding two or more automotive parts, and also includes a fourth clamping device. The fourth clamping device includes a fourth base plate, a fourth drive mechanism, and a fourth rotating arm and a fourth positioning block assembly disposed on the fourth base plate. The fourth base plate is detachably connected to the first base plate. The fourth drive mechanism is fixed on the fourth base plate. The output end of the fourth drive mechanism passes through the first base plate and is rotatably connected to the fourth rotating arm, thereby driving the fourth rotating arm to rotate. The fourth rotating arm cooperates with the fourth positioning block assembly to fix and assemble the parts to be assembled after welding by the clamping mechanism.

[0007] The above setup allows for welding of small orders of parts without requiring the fourth base plate to be detached from the first base plate. This enables different parts to be fixed onto multiple clamping devices, separating different welding processes. After different parts are welded and assembled, the assembled parts fixed to the fourth clamping device can be welded directly onto the first base plate. This allows for the use of a small number of workers on a single platform to perform different processes, reducing the cost of transferring between multiple processes. For large orders of parts, the fourth base plate can be detached from the first base plate. Since the fourth drive mechanism, fourth rotating arm, and fourth positioning block assembly are located on the fourth base plate, the fourth clamping device can be detached from the first base plate. This allows different welders to simultaneously weld different parts on the first base plate. The components are welded and assembled separately on the fourth clamping device without affecting each other. When multiple clamping devices are set on the same workbench, the influence of clamping devices located around one clamping device can easily cause one or more welders to be unable to weld and assemble the fourth clamping device from multiple directions. By removing the fourth clamping device from the first base plate, the fourth clamping device can be set separately on the fourth base plate, which facilitates operation from four directions on the fourth base plate. Different components are welded on the first base plate, and then the different automotive components that have been welded are assembled and welded on the fourth clamping device. At the same time, the next batch of different components is welded on the first base plate, so that different processes can be welded simultaneously, which speeds up the overall welding process and improves welding efficiency.

[0008] Furthermore, the clamping mechanism includes a first clamping device, a second clamping device, a third clamping device, and a fourth clamping device, which are arranged in a matrix on the first base plate.

[0009] The above configuration, with multiple clamping devices arranged in a matrix on the first base plate, can minimize the width of the first base plate. Furthermore, the first clamping device includes a first driving mechanism and a first rotating arm and a first positioning block group disposed on the first base plate. The first positioning block group includes a first positioning block and two first and second positioning blocks. The output end of the first driving mechanism passes through the first base plate and is rotatably connected to one rotating end of the first rotating arm. The first rotating arm is hinged to a first fixed seat fixed on the first base plate. The other end of the first rotating arm is located above the first positioning block. The first positioning block is provided with a first limiting post and a second limiting post.

[0010] The above configuration allows the first drive mechanism to rotate the first rotating arm around the hinge joint between the first rotating arm and the first fixed seat, positioning it above the first positioning block. Then, after cooperating with the first positioning block, it limits the first component in the vertical direction, thereby pressing the component onto the first positioning block. At the same time, the first component pressed onto the first positioning block is sleeved on the first limiting post and the second limiting post, thereby limiting the first component on the horizontal plane through the first limiting post and the second limiting post.

[0011] Furthermore, the first and second positioning blocks are symmetrically arranged on both sides of the first positioning block, and the first and second cylinders are fixedly installed on the first and second positioning blocks. The output ends of the first and second cylinders are connected to the limiting cylinder. The limiting cylinder is movably sleeved in the sleeve located on the first and second positioning blocks along the direction perpendicular to the first rotating arm. The end of the limiting cylinder away from the first and second cylinder is recessed inward along the axis of the limiting cylinder to form a step.

[0012] With the above configuration, the limiting cylinder is moved along a direction perpendicular to the first rotating arm by the first and second cylinders on the first and second positioning blocks, which can be fixed from both ends of the first connecting piece to be welded, thereby facilitating welding between the first connecting piece and the first component.

[0013] Furthermore, the second clamping device includes a second driving mechanism and a second rotating arm and a second positioning block group disposed on the first base plate. The second positioning block group includes a second first positioning block, a second second positioning block, a second third positioning block, a second fourth positioning block, and a second fifth positioning block. The output end of the second driving mechanism passes through the first base plate and is rotatably connected to one rotating end of the second rotating arm. The second rotating arm is hinged to a second first fixed seat fixed on the first base plate. The other end of the second rotating arm is located above the second second positioning block. The second first positioning block and the second third positioning block are disposed on both sides of the second second positioning block. A third limiting post is provided on the second third positioning block. A fourth limiting post is provided on the second fourth positioning block located on one side of the second third positioning block and is coaxially disposed with the third limiting post. A second fifth cylinder is provided on the second fifth positioning block. The output end of the second fifth cylinder is connected to the fifth limiting post. The fifth limiting post is movably sleeved in the fifth sleeve in a direction perpendicular to the first base plate.

[0014] The above configuration allows the second component to be placed on the second first positioning block and the second second positioning block. At the same time, the third limiting post on the second third positioning block positions one side of the second component, restricting the movement of the second component on the horizontal plane. The fifth limiting post is driven by the second fifth cylinder to limit the second component in the vertical direction. The fourth limiting post on the second fourth positioning block positions one side of the second connecting piece placed on the second component.

[0015] Furthermore, the second clamping device also includes a second fixed base and a second cylinder fixed on the second fixed base. The output end of the second cylinder is connected to a second connecting base. A second sixth positioning block and a second seventh positioning block are fixed on the second connecting base. A sixth limiting post is fixed on the second sixth positioning block, and a seventh limiting post is fixed on the second seventh positioning block. A second limiting block is provided at the bottom of the second connecting base. A second guide post is connected to the second limiting block. A second through hole matching the second guide post is provided on the second fixed base.

[0016] The above configuration, through the movement of the second sixth and seventh positioning blocks driven by the second cylinder, allows the seventh limiting post on the second seventh positioning block to position the other side of the second component. This, in conjunction with the third limiting post on the second third positioning block, limits the second component from both sides, thereby restricting its movement in the horizontal plane. Meanwhile, the sixth limiting post on the second sixth positioning block positions the other side of the second connector. This, in conjunction with the fourth limiting post on the second fourth positioning block, limits the second connector from both sides, thus fixing the second connector to the second component for welding.

[0017] Furthermore, the third clamping device includes a third driving mechanism and a third rotating arm and a third positioning block group disposed on the first base plate. The third positioning block group includes a third first positioning block and two third second positioning blocks. The output end of the third driving mechanism passes through the first base plate and is rotatably connected to one rotating end of the third rotating arm. The third rotating arm is hinged to a third fixed seat fixed on the first base plate. Two eighth limiting posts are provided on the third first positioning block. The other end of the third rotating arm is provided with a receiving groove. After the third rotating arm abuts against the third component, the eighth limiting posts are accommodated in the receiving groove.

[0018] With the above configuration, after the third component is fitted onto the eighth limiting post, the third driving mechanism can drive the third rotating arm to rotate around the hinge between the third rotating arm and the third fixed seat, and then press the third component above the third positioning block. Furthermore, by setting the receiving groove, the pressing of the third component by the third rotating arm is not affected.

[0019] Furthermore, the third and second positioning blocks are symmetrically arranged on both sides of the third and first positioning block, and a third and second stop block is fixedly provided on the third and second positioning blocks. The third clamping device also includes a third and third fixed seat and a third and third cylinder fixed on the third and third fixed seat. The output end of the third and third cylinder is connected to a third and third connecting seat. Two symmetrically arranged third and third positioning blocks are fixed on the third and third connecting seat. The third and third positioning blocks are provided with positioning posts arranged parallel to the third rotating arm. A boss is provided at one end of the positioning post near the third and third positioning block. After the third component is sleeved on the positioning post, it abuts against the boss. A third and third limiting block is provided at the bottom of the third and third connecting seat. A third and third guide post is connected to the third and third limiting block. A third and third through hole matching the third and third guide post is provided on the third and third fixed seat.

[0020] With the above setup, after the third connecting piece is fitted onto the positioning post, the third connecting piece is moved by the third cylinder, and at the same time, the third connecting piece is limited by the third stop block on the third positioning block, so that the third connecting piece abuts against the third stop block, thereby allowing the third connecting piece to move exactly to both ends of the third component.

[0021] Furthermore, the output end of the fourth drive mechanism, which penetrates through the first base plate, is rotatably connected to one end of the fourth rotating arm. The fourth rotating arm is hinged to the fourth fixed seat fixed on the fourth base plate. The other end of the fourth rotating arm is provided with a fourth first pressure arm and two fourth second pressure arms symmetrically arranged about the fourth first pressure arm. The end of the fourth second pressure arm is provided with a through groove.

[0022] With the above configuration, after the fourth component is placed on the fourth positioning block group, the fourth drive mechanism can drive the fourth rotating arm to rotate and press the fourth component, so that the first component welded in the first clamping device, the second component welded in the second clamping device, and the third component welded in the third clamping device can be assembled on the fourth component to form an assembly.

[0023] Furthermore, the fourth positioning block group includes a fourth first positioning block, a fourth second positioning block, and two fourth third positioning blocks. The fourth first positioning block is fixed on the fourth base plate and located below the fourth first pressure arm. The two fourth third positioning blocks are respectively located below the two fourth second pressure arms. The fourth third positioning block is provided with a ninth limiting post arranged vertically. After the two fourth second pressure arms press and place the fourth component on the fourth positioning block group, the ninth limiting post is accommodated in the through groove. The fourth second positioning block is arranged between the fourth third positioning blocks. The fourth second positioning block is provided with a fourth second fixing seat for placing the first component.

[0024] With the above configuration, the ninth limiting post is set on the fourth positioning block. After the fourth component is sleeved on the ninth limiting post, the movement of the fourth component in the horizontal plane can be restricted. At the same time, the fourth component can be fixed by pressing the different pressure arms on the fourth rotating arm, so that the assembled components can be welded. Attached Figure Description

[0025] Figure 1 This is a first-view three-dimensional structural diagram of the present invention.

[0026] Figure 2 This is a second-view three-dimensional structural diagram of the present invention.

[0027] Figure 3 This is a partial exploded view of the present invention.

[0028] Figure 4 This is a schematic diagram of the third-view three-dimensional structure of this utility model.

[0029] Figure 5 for Figure 3 Enlarged view of section A1 in the middle.

[0030] Figure 6 for Figure 3 Enlarged view at point A2 in the middle.

[0031] Figure 7 for Figure 3 Enlarged view at point A3 in the middle.

[0032] Figure 8 for Figure 4 Enlarged view at A4 in the middle.

[0033] Figure 9 This is a schematic diagram of the first component in this utility model.

[0034] Figure 10 This is a schematic diagram of the second component in this utility model.

[0035] Figure 11 This is a schematic diagram of the third component in this utility model.

[0036] Figure 12 This is a schematic diagram of the fourth component in this utility model.

[0037] Figure 13 This is a schematic diagram showing the first, second, third, and fourth components assembled together in this utility model. Detailed Implementation

[0038] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0039] like Figure 1-12 As shown, this utility model provides a welding fixture for automotive parts, including a first base plate 1 and a first clamping device 2, a second clamping device 3, a third clamping device 4, and a fourth clamping device 5 mounted on the first base plate 1. The parts to be welded include a first part 6 fixed to the first clamping device 2, a second part 7 fixed to the second clamping device 3, a third part 8 fixed to the third clamping device 4, and a fourth part 9 fixed to the fourth clamping device 5. The first clamping device 2 includes a first driving mechanism 11, a first rotating arm 10 mounted on the first base plate 1, and a first positioning block group. The first positioning block group includes a first positioning block 12 and two first second positioning blocks 13. The output end of the first driving mechanism 11 passes through the first base plate 1 and is rotatably connected to the rotating end of the first rotating arm 10. The first rotating arm 10 is hinged to the first fixed seat 14 fixed on the first base plate 1. The other end of the first rotating arm 10 is located above the first positioning block 12. The first positioning block 12 is provided with a first limiting post 19 and a second limiting post 20 so that the first driving mechanism 11 drives the first rotating arm 10 to rotate around the hinge point between the first rotating arm 10 and the first fixed seat 14 and then position it above the first positioning block 12. After cooperating with the first positioning block 12, it limits the first component 6 in the vertical direction, thereby pressing the component onto the first positioning block 12. At the same time, the first component 6 pressed on the first positioning block 12 is sleeved on the first limiting post 19 and the second limiting post 20, thereby limiting the first component 6 on the horizontal plane through the first limiting post 19 and the second limiting post 20. In this embodiment, the first driving mechanism 11 is a first cylinder.

[0040] like Figure 1 and Figure 5As shown, the first and second positioning blocks 13 are symmetrically arranged on both sides of the first positioning block 12. The first and second positioning blocks 13 are fixedly equipped with the first and second cylinders 15. The height of the first and second cylinders 15 matches the height of the first component 6 after it is placed on the first positioning block 12. The output end of the first and second cylinders 15 is connected to the limiting cylinder 16. The limiting cylinder 16 is movably sleeved in the sleeve 18 located on the first and second positioning blocks 13 along the extension direction perpendicular to the first rotating arm 10. The end of the limiting cylinder 16 away from the first and second cylinder 15 is recessed inward along the axial direction of the limiting cylinder 16 to form a step (not shown in the figure). Then, by the first and second cylinders 15 on the first and second positioning blocks 13 driving the limiting cylinder 16 to move along the direction perpendicular to the first rotating arm 10, the two ends of the first connecting piece 17 to be welded can be fixed, thereby facilitating welding between the first connecting piece 17 and the first component 6.

[0041] like Figure 1 , Figure 2 and Figure 4 , Figure 6 As shown, the second clamping device 3 includes a second drive mechanism 21, a second rotating arm 22 and a second positioning block group disposed on the first base plate 1. The second positioning block group includes a second first positioning block 24, a second second positioning block 25, a second third positioning block 26, a second fourth positioning block 27 and a second fifth positioning block 30. The output end of the second drive mechanism 21 passes through the first base plate 1 and is rotatably connected to one rotating end of the second rotating arm 22. The second rotating arm 22 is hinged to a second first fixed seat 23 fixed on the first base plate 1. The other end of the second rotating arm 22 is located above the second second positioning block 25. The second first positioning block 24 and the second third positioning block 26 are disposed on both sides of the second second positioning block 25. The second third positioning block 26 is provided with a third limiting post 28. The second fourth positioning block 27 located on one side of the second third positioning block 26 is provided with a positioning post 28. A fourth limiting post 29 is coaxially arranged with the three limiting posts 28. A second fifth cylinder 31 is provided on the second fifth positioning block 30. The output end of the second fifth cylinder 31 is connected to the fifth limiting post 32. The fifth limiting post 32 is movably sleeved in the fifth sleeve 218 along a direction perpendicular to the first base plate 1. This allows the second component 7 to be placed on the second first positioning block 24 and the second second positioning block 25. At the same time, the third limiting post 28 on the second third positioning block 26 is positioned by passing through a through hole on one side of the second component 7, restricting the movement of the second component 7 on the horizontal plane. The second fifth cylinder 31 drives the fifth limiting post 32 to limit the second component 7 in the vertical direction. The fourth limiting post 29 on the second fourth positioning block 27 can be positioned by passing through a through hole on one side of the second connecting member 33 placed on the second component 7. In this embodiment, the second driving mechanism 21 is the second cylinder.

[0042] like Figure 3 and Figure 6As shown, the second clamping device 3 also includes a second fixed base 34 and a second cylinder 35 fixed on the second fixed base 34. The height of the second cylinder 35 matches the height of the second component 7 placed on the second positioning block assembly. The output end of the second cylinder 35 is connected to a second connecting base 36. A second sixth positioning block 37 and a second seventh positioning block 38 are fixed on the second connecting base 36. A sixth limiting post 39 is fixed on the second sixth positioning block 37, and a seventh limiting post 40 is fixed on the second seventh positioning block 38. A second limiting block (not shown in the figure) is provided at the bottom of the second connecting base 36. A second guide post 41 is connected to the second limiting block. A second through hole (not shown in the figure) is provided on the second fixed base 34 that matches the second guide post 41. Thus, after the second cylinder 35 drives the second sixth positioning block 37 and the second seventh positioning block 38 to move, the seventh limiting post 40 on the second seventh positioning block 38 passes through the through hole on the other side of the second component 7 for positioning. It can cooperate with the third limiting post 28 on the second third positioning block 26 to limit the second component 7 from both sides, thereby restricting the movement of the second component 7 in the horizontal plane. Meanwhile, the sixth limiting post 39 on the second sixth positioning block 37 can pass through the through hole on the other side of the second connector 33 for positioning. It can cooperate with the fourth limiting post 29 on the second fourth positioning block 27 to limit the second connector 33 from both sides, thereby fixing the second connector 33 to the second component 7 to achieve welding.

[0043] like Figure 1 , Figure 2 and Figure 8 As shown, the third clamping device 4 includes a third driving mechanism 42, a third rotating arm 43 and a third positioning block group disposed on the first base plate 1. The third positioning block group includes a third first positioning block 45 and two third second positioning blocks 46. The output end of the third driving mechanism 42 passes through the first base plate 1 and is rotatably connected to one rotating end of the third rotating arm 43. The third rotating arm 43 is hinged to a third fixed seat 44 fixed on the first base plate 1. The third first positioning block 45 is provided with two eighth limiting posts 47. The other end of the third rotating arm 43 is provided with a receiving groove (not shown in the figure). After the third rotating arm 43 abuts against the third component 8, the eighth limiting posts 47 are accommodated in the receiving groove. In this way, after the third component 8 is sleeved on the eighth limiting posts 47, the third rotating arm 43 can be driven by the third driving mechanism 42 to rotate around the hinge point between the third rotating arm 43 and the third fixed seat 44 and then press the third component 8 above the third first positioning block 45. Moreover, the receiving groove is provided without affecting the pressing of the third component 8 by the third rotating arm 43. In this embodiment, the third drive mechanism 42 is a third cylinder.

[0044] like Figure 3 and Figure 8As shown, the third positioning blocks 46 are symmetrically arranged on both sides of the third fixed seat 44. A third stop block 48 is fixedly mounted on each of the third positioning blocks 46. The third clamping device 4 also includes a third fixed seat 49 and a third cylinder 50 fixed on the third fixed seat 49. The height of the third cylinder 50 matches the height of the third component 8 placed after the third positioning block assembly. The output end of the third cylinder 50 is connected to a third connecting seat 51. Two symmetrically arranged third positioning blocks 52 are fixed on the third connecting seat 51. Each third positioning block 52 has a positioning post (not shown in the figure) arranged parallel to the third rotating arm 43. The positioning post is close to the third positioning block. One end of 52 is provided with a boss 53. After the third component 8 is sleeved on the positioning post, it abuts against the boss 53. The bottom of the third connecting seat 51 is provided with a third limiting block (not shown in the figure). The third limiting block is connected to the third guide post 54. The third fixing seat 49 is provided with a third through hole 55 that matches the third guide post 54. In this way, after the third connecting component is sleeved on the positioning post, the third connecting component is moved by the third cylinder 50. At the same time, the third connecting component is limited by the third stop block 48 on the third positioning block 46, so that the third connecting component abuts against the third stop block 48, thereby making the third connecting component move to both ends of the third component 8.

[0045] like Figure 2 and Figure 3 As shown, the fourth clamping device 5 includes a fourth base plate 56, a fourth drive mechanism 57, a fourth rotating arm 58 and a fourth positioning block group disposed on the fourth base plate 56. The fourth positioning block group includes a fourth first positioning block 63, a fourth second positioning block 66 and two fourth third positioning blocks 64. The fourth base plate 56 is detachably connected to the first base plate 1 by a locking member, which is a bolt. The output end of the fourth drive mechanism 57 passes through the first base plate 1 and the fourth base plate 56 in sequence and is rotatably connected to the fourth rotating arm 58, thereby driving the fourth rotating arm 58 to rotate. The fourth rotating arm 58 cooperates with the fourth positioning block group to fix the assembled parts. In this embodiment, the fourth drive mechanism 57 is a fourth cylinder.

[0046] like Figure 1 and Figure 7As shown, the output end of the fourth drive mechanism 57, which passes through the first base plate 1, is rotatably connected to one end of the fourth rotating arm 58. The fourth rotating arm 58 is hinged to the fourth fixed seat 59, which is fixed on the fourth base plate 56. The other end of the fourth rotating arm 58 is provided with a fourth first pressure arm 60 and two fourth second pressure arms 61 symmetrically arranged about the fourth first pressure arm 60. The end of the fourth second pressure arm 61 is provided with a through groove 62. In this way, after the fourth component 9 is placed on the fourth positioning block group, the fourth drive mechanism 57 can drive the fourth rotating arm 58 to rotate and press the fourth component 9, so that the first component 6, which is welded in the first clamping device 2, the second component 7, which is welded in the second clamping device 3, and the third component 8, which is welded in the third clamping device 4, can be assembled on the fourth component 9 to form an assembly.

[0047] The fourth positioning block 63 is fixed on the fourth base plate 56 and located below the fourth pressure arm 60. The two fourth positioning blocks 64 are respectively located below the two fourth pressure arms 61. The fourth positioning block 64 is provided with a ninth limiting post 65 arranged vertically. After the two fourth pressure arms 61 press and place the fourth component 9 on the fourth positioning block assembly, the ninth limiting post 65 is accommodated in the through groove 62. The fourth positioning block 66 is arranged between the fourth and third positioning blocks 64. The fourth positioning block 66 is provided with a fourth fixing seat 6 for placing the first component 6. 7. The fourth component 9 is provided with mounting slots for the first component 6, the second component 7, and the third component 8. The first component 6, the second component 7, and the third component 8 are connected to achieve pre-assembly. Then, since the ninth limiting post 65 is provided on the fourth positioning block 64, the fourth component 9 can be restricted from moving in the horizontal plane after being sleeved on the ninth limiting post 65. At the same time, the fourth component 9 can be fixed by pressing the different pressure arms on the fourth rotating arm 58, and then the assembled components can be welded.

[0048] In this embodiment, through the cooperation of the first clamping device 2, the second clamping device 3, the third clamping device 4, and the fourth clamping device 5, when welding a small number of parts, it is not necessary to separate the fourth base plate 56 from the first base plate 1. This allows different parts to be fixed on the first clamping device 2, the second clamping device 3, and the third clamping device 4 respectively, separating different welding processes. After the welding of different parts is completed, the components are assembled on the fourth component 9 of the fourth clamping device 5 to form an assembly. The assembly fixed on the fourth clamping device 5 can be welded directly on the first base plate 1, thereby utilizing a small number of workers to perform different processes on one platform, reducing the transfer costs between multiple processes. When welding a large number of parts, the fourth base plate 56 can be detached from the first base plate 1. Since the fourth drive mechanism, the fourth rotating arm 58, and the fourth positioning block assembly are set on the fourth base plate 56, the fourth clamping device 56 can be detached from the first base plate 1. The four clamping devices 5 can be detached from the first base plate 1, allowing different welders to simultaneously weld different parts on the first base plate 1 and assemble the fourth part 9, which is separately mounted on the fourth clamping device 5, without interfering with each other. When multiple clamping devices are set on the same workbench, the clamping devices located around one clamping device can cause one or more welders to be unable to weld and assemble the fourth clamping device from multiple directions. By removing the fourth clamping device from the first base plate, it can be set up independently on the fourth base plate, making it convenient to operate from four directions on the fourth base plate. Different parts can be welded on the first base plate, and then the different automotive parts that have been welded can be assembled and welded on the fourth clamping device. At the same time, the next batch of different parts can be welded on the first base plate, so as to realize the simultaneous welding of different processes, speed up the overall welding process, and improve welding efficiency.

Claims

1. A welding fixture for automotive parts, comprising a first base plate and a clamping mechanism disposed on the first base plate, the clamping mechanism comprising two or more clamping devices for clamping and welding two or more automotive parts, characterized in that: It also includes a fourth clamping device, which includes a fourth base plate, a fourth drive mechanism, a fourth rotating arm and a fourth positioning block assembly disposed on the fourth base plate. The fourth base plate is detachably connected to the first base plate. The fourth drive mechanism is fixed on the fourth base plate. The output end of the fourth drive mechanism passes through the first base plate and the fourth base plate in sequence and is rotatably connected to the fourth rotating arm, thereby driving the fourth rotating arm to rotate. The fourth rotating arm cooperates with the fourth positioning block assembly to fix and assemble the parts to be assembled after the clamping mechanism is welded.

2. The welding fixture for automotive parts according to claim 1, characterized in that: The clamping mechanism includes a first clamping device, a second clamping device, a third clamping device, and a fourth clamping device, which are arranged in a matrix on the first base plate.

3. The welding fixture for automotive parts according to claim 2, characterized in that: The first clamping device includes a first driving mechanism and a first rotating arm and a first positioning block group disposed on the first base plate. The first positioning block group includes a first positioning block and two first and second positioning blocks. The output end of the first driving mechanism passes through the first base plate and is rotatably connected to one rotating end of the first rotating arm. The first rotating arm is hinged to a first fixed seat fixed on the first base plate. The other end of the first rotating arm is located above the first positioning block. The first positioning block is provided with a first limiting post and a second limiting post.

4. The welding fixture for automotive parts according to claim 3, characterized in that: The first and second positioning blocks are symmetrically arranged on both sides of the first positioning block. The first and second cylinders are fixed on the first and second positioning blocks. The output end of the first and second cylinders is connected to the limiting cylinder. The limiting cylinder is movably sleeved in the sleeve located on the first and second positioning blocks along the direction perpendicular to the first rotating arm. The end of the limiting cylinder away from the first and second cylinder is recessed inward along the axis of the limiting cylinder to form a step.

5. The welding fixture for automotive parts according to claim 2, characterized in that: The second clamping device includes a second driving mechanism and a second rotating arm and a second positioning block group disposed on the first base plate. The second positioning block group includes a second first positioning block, a second second positioning block, a second third positioning block, a second fourth positioning block, and a second fifth positioning block. The output end of the second driving mechanism passes through the first base plate and is rotatably connected to one rotating end of the second rotating arm. The second rotating arm is hinged to a second first fixed seat fixed on the first base plate. The other end of the second rotating arm is located above the second second positioning block. The second first positioning block and the second third positioning block are disposed on both sides of the second second positioning block. A third limiting post is provided on the second third positioning block. A fourth limiting post is provided on the second fourth positioning block located on one side of the second third positioning block and is coaxially disposed with the third limiting post. A second fifth cylinder is provided on the second fifth positioning block. The output end of the second fifth cylinder is connected to the fifth limiting post. The fifth limiting post is movably sleeved in the fifth sleeve in a direction perpendicular to the first base plate.

6. The welding fixture for automotive parts according to claim 5, characterized in that: The second clamping device further includes a second fixed base and a second cylinder fixed on the second fixed base. The output end of the second cylinder is connected to a second connecting base. A second sixth positioning block and a second seventh positioning block are fixed on the second connecting base. A sixth limiting post is fixed on the second sixth positioning block, and a seventh limiting post is fixed on the second seventh positioning block. A second limiting block is provided at the bottom of the second connecting base. A second guide post is connected to the second limiting block. A second through hole matching the second guide post is provided on the second fixed base.

7. The welding fixture for automotive parts according to claim 2, characterized in that: The third clamping device includes a third driving mechanism and a third rotating arm and a third positioning block group disposed on the first base plate. The third positioning block group includes a third first positioning block and two third second positioning blocks. The output end of the third driving mechanism passes through the first base plate and is rotatably connected to one rotating end of the third rotating arm. The third rotating arm is hinged to a third fixed seat fixed on the first base plate. Two eighth limiting posts are provided on the third first positioning block. The other end of the third rotating arm is provided with a receiving groove. After the third rotating arm abuts against the third component, the eighth limiting posts are accommodated in the receiving groove.

8. The welding fixture for automotive parts according to claim 7, characterized in that: The third and second positioning blocks are symmetrically arranged on both sides of the third and first positioning block. The third and second positioning blocks are fixedly provided with third and second stop blocks. The third clamping device also includes a third and third fixed seat and a third and third cylinder fixed on the third and third fixed seat. The output end of the third and third cylinder is connected to a third and third connecting seat. Two symmetrically arranged third and third positioning blocks are fixed on the third and third connecting seat. The third and third positioning blocks are provided with positioning posts arranged parallel to the third rotating arm. The end of the positioning post near the third and third positioning block is provided with a boss. The third component is sleeved on the positioning post and abuts against the boss. The bottom of the third and third connecting seat is provided with a third and third limiting block. The third and third limiting block is connected with a third and third guide post. The third and third fixed seat is provided with a third and third through hole that matches the third and third guide post.

9. The welding fixture for automotive parts according to claim 1, characterized in that: The output end of the fourth drive mechanism, which is set through the first base plate, is rotatably connected to one end of the fourth rotating arm after passing through the first base plate. The fourth rotating arm is hinged to the fourth fixed seat fixed on the fourth base plate. The other end of the fourth rotating arm is provided with a fourth first pressure arm and two fourth second pressure arms symmetrically arranged about the fourth first pressure arm. The end of the fourth second pressure arm is provided with a through groove.

10. A welding fixture for automotive parts according to claim 9, characterized in that: The fourth positioning block group includes a fourth first positioning block, a fourth second positioning block, and two fourth third positioning blocks. The fourth first positioning block is fixed on the fourth base plate and located below the fourth first pressure arm. The two fourth third positioning blocks are located below the two fourth second pressure arms respectively. The fourth third positioning block is provided with a ninth limiting post arranged vertically. After the two fourth second pressure arms press and place the fourth component on the fourth positioning block group, the ninth limiting post is accommodated in the through groove. The fourth second positioning block is arranged between the fourth third positioning blocks. The fourth second positioning block is provided with a fourth second fixing seat for placing the first component.

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