Automobile part welding clamp

Abstract

The invention discloses an automobile part welding fixture, and relates to the technical field of automobile manufacturing, the automobile part welding fixture comprises a bottom plate and a retention block, a rotatable first rotating table is mounted on the top surface of the bottom plate, a connecting block is fixedly mounted on the top surface of the first rotating table, and a lifting plate is hinged to the inner wall of the connecting block; a mounting groove is formed in the middle of the top surface of the first rotating table, a rotatable third threaded rod is arranged in the mounting groove, a movable push block is in threaded connection with the outer wall of the third threaded rod, a butt-joint clamping block is connected to the bottom of the lifting plate, and a connecting rod hinged to the movable push block and the butt-joint clamping block at the same time is connected between the movable push block and the butt-joint clamping block. According to the device, through linkage of the first rotating table, the lifting plate and the second rotating table, multi-dimensional adjustment of the horizontal plane, the vertical plane and the inclination angle is achieved, the limitation that a traditional clamp can only conduct translation or single-axis rotation is overcome, the application range of the device is widened, and the situation that the device undercuts in the welding process is reduced.

Description

Technical Field

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

[0002] In the modern automobile manufacturing industry, the widespread use of metal cutting and welding equipment such as automatic / semi-automatic arc and plasma arc welding machines has put forward higher requirements on the welding quality and efficiency of automobile parts. The complexity of the structure of the parts (such as the engine intake manifold and the body frame structure) causes the welds to be in complex spatial positions, and the sensitivity of plasma arc welding to the posture of the workpiece (the angle error between the arc axis and the weld normal must be ≤5°) further highlights the importance of precise adjustment of the welding fixture. In order to ensure the quality of welding, the welding part needs to be presented to the plasma arc in the best posture during the welding process, which puts forward the requirement of precise multi-angle adjustment of the welding fixture.

[0003] Traditional welding fixtures are mostly fixed positions or can only achieve simple translation adjustment, which is difficult to meet the multi-angle welding requirements of complex automotive parts. For example, for parts with inclined or curved welds, traditional fixtures cannot flexibly adjust the workpiece angle, making it difficult for the arc to be perpendicular to the weld during welding, which easily leads to welding defects such as incomplete penetration and undercut, which seriously affects the strength and sealing of the welded joint.

[0004] The most serious of these is undercut. The existence of undercut not only reduces the effective cross-sectional area of ​​the weld and the strength of the welded joint, but also forms stress concentration at the undercut. The frame structure of the automobile body is subjected to complex stresses during vehicle driving, including tension, compression, bending, etc. If there is an undercut defect in the weld of the frame structure, cracks will quickly form at the undercut under the action of long-term alternating stress and expand along the weld. For this reason, it is necessary to provide an automobile parts welding fixture that can achieve multi-angle adjustment after completing the fixation of the parts, thereby reducing the occurrence of undercut phenomenon.

[0005] In view of this, an automobile parts welding fixture is provided to overcome the above-mentioned defects. Summary of the invention

[0006] The object of the present invention is to provide a welding fixture for automobile parts to solve the problems raised in the above background technology.

[0007] In order to solve the above technical problems, the present invention provides an automobile accessory welding fixture, including a base plate and a fixing block, wherein a rotatable first rotating table is installed on the top surface of the base plate, a connecting block is fixedly installed on the top surface of the first rotating table, a lifting plate is hinged on the inner wall of the connecting block, an installation groove is opened in the middle position of the top surface of the first rotating table, a rotatable third threaded rod is arranged inside the installation groove, a movable push block is threadedly connected on the outer wall of the third threaded rod, a docking clamping block is connected to the bottom of the lifting plate, a connecting rod is connected between the movable push block and the docking clamping block, and the two are hinged to each other, a rotatable second rotating table is installed in the middle position of the top surface of the lifting plate, a supporting block is fixedly installed on the top surface of the second rotating table, a placing table is fixedly installed on the top surface of the supporting block, and the fixing block is arranged on the top surface of the placing table.

[0008] Furthermore, a second motor is fixedly installed at the middle position of the bottom surface of the base plate, and the second motor is transmission-connected to the first rotating platform. A first motor is fixedly installed on the side wall of the first rotating platform, and the first motor is transmission-connected to the third threaded rod.

[0009] Furthermore, a third motor is fixedly installed in the middle position of the bottom surface of the placing table, and the top of the third motor is transmission-connected with a driving bevel gear. A square groove is opened on the top surface of the placing table, and a rotatable second threaded rod is installed on the side wall of the square groove. A movable slide is threadedly connected on the outer wall of the second threaded rod, and a driven bevel gear is fixedly connected to the end of the second threaded rod, and the driven bevel gear and the driving bevel gear are meshed with each other.

[0010] Furthermore, the retaining block is fixedly mounted on the top surface of the movable slide, and a protective cover is fixedly mounted at the middle position of the top surface of the placement table.

[0011] Furthermore, a mounting plate is fixedly installed at the edge of the top surface of the lifting plate, a first threaded rod is threadedly connected to the side wall of the mounting plate, a rotatable connecting sleeve is connected to one end of the first threaded rod close to the placing table, and a retaining plate is fixedly connected to one end of the first threaded rod of the connecting sleeve material.

[0012] Furthermore, the specific shape of the retaining plate is an arc, and a plurality of triangular notches are provided on the outer wall of the retaining plate close to the placement table. The retaining plate is tightly fitted on the side walls of the second rotating table and the placement table in an initial state.

[0013] Furthermore, a mounting box is fixedly mounted on the top surface of the retaining block, a pressing block is hinged inside the mounting box, a square notch is formed at the bottom of the pressing block, and straight notches are formed on both sides of the inner wall of the square notch.

[0014] Furthermore, the rear end of the installation box is threadedly connected to a threaded pull rod, one end of the threaded pull rod is connected to a rotatable docking sleeve, and the end of the docking sleeve away from the first threaded rod is fixedly connected to a round rod, and the round rod is simultaneously inside two straight slots in an initial state.

[0015] Furthermore, the rear ends of the connecting sleeve and the threaded pull rod are fixedly connected to a circular knob, and four semi-arc grooves are provided on the outer wall of the circular knob, and the four semi-arc grooves are distributed in a circular array.

[0016] Furthermore, the specific number of the support blocks is four, and the four support blocks are distributed in a circular array on the top surface of the second rotating table.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. Through the linkage of the first rotating table, the lifting plate and the second rotating table, multi-dimensional adjustment of the horizontal plane, vertical plane and tilt angle can be achieved, which solves the limitation that the traditional fixture can only translate or rotate on a single axis, increases the application scope of the device, and reduces the occurrence of undercut during welding.

[0018] 2. By setting the straight slot and the round rod, when the user rotates the threaded rod, the round rod moves along the guide track of the straight slot. This linear motion is converted into the rotation torque of the pressure block around the hinge axis through the lever principle, so that the device can further fix the auto parts to prevent them from loosening during welding and reduce the production of welding defective products.

[0019] 3. When the lifting plate is tilted as a whole, a small amount of welding slag produced by welding will not easily stay on the surface of the device under the action of gravity, reducing the difficulty of subsequent cleaning of the device. At the same time, when the device does not need to be tilted for use, the first motor can be started to tilt the lifting plate after the device is used, thereby pouring down the welding slag on the surface of the device, which also reduces the difficulty of cleaning the device.

[0020] 4. By setting the retaining block movable, the lateral adjustment range of the retaining block is improved, the pressing block can adapt to plates of greater thickness, and is compatible with more than 20 accessories such as engine brackets and intake manifolds, thereby increasing the scope of application of the device.

[0021] 5. By providing a circular knob and opening four semi-arc grooves on the outer wall of the circular knob, the user can more easily rotate the connecting sleeve and the threaded pull rod, thereby reducing the difficulty of using the device and making the device more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic structural diagram of the overall view of the present invention; Figure 2 It is a schematic structural diagram of the side view of the present invention; Figure 3 It is a schematic diagram of the structure of the present invention viewed from above; Figure 4 It is a schematic diagram of the structure of the present invention; Figure 5 It is a schematic diagram of the rear structure of the present invention; Figure 6 It is a structural schematic diagram of the helical gear in the present invention; Figure 7 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0023] In the figure: 1, base plate; 2, first rotating table; 3, lifting plate; 4, placing table; 5, retaining block; 6, supporting block; 7, first motor; 8, mounting plate; 9, first threaded rod; 10, retaining plate; 11, connecting sleeve; 12, second motor; 13, connecting block; 14, second rotating table; 15, protective cover; 16, third motor; 17, second threaded rod; 18, moving slide; 19, third threaded rod; 20, moving push block; 21, connecting rod; 22, driven bevel gear; 23, driving bevel gear; 24, mounting box; 25, pressing block; 26, straight notch; 27, round rod; 28, docking sleeve; 29, threaded pull rod. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. 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 creative work are within the scope of protection of the present invention.

[0025] Embodiment 1 See also Figure 1-7 A welding fixture for automobile accessories comprises a base plate 1 and a retaining block 5, a rotatable first rotating table 2 is installed on the top surface of the base plate 1, a connecting block 13 is fixedly installed on the top surface of the first rotating table 2, a lifting plate 3 is hinged on the inner wall of the connecting block 13, a mounting groove is opened in the middle position of the top surface of the first rotating table 2, a rotatable third threaded rod 19 is arranged inside the mounting groove, a movable push block 20 is threadedly connected on the outer wall of the third threaded rod 19, a docking clamping block is connected to the bottom of the lifting plate 3, a connecting rod 21 which is hinged to both of the movable push block 20 and the docking clamping block is connected between the movable push block 20 and the docking clamping block, a rotatable second rotating table 14 is installed in the middle position of the top surface of the lifting plate 3, a supporting block 6 is fixedly installed on the top surface of the second rotating table 14, a placing table 4 is fixedly installed on the top surface of the supporting block 6, and the retaining block 5 is arranged on the top surface of the placing table 4.

[0026] By setting an installation groove in the middle position of the top surface of the first rotating table 2, a rotatable third threaded rod 19 is set inside the installation groove, and the outer wall of the third threaded rod 19 is threadedly connected to a moving push block 20, the bottom of the lifting plate 3 is connected to a docking clamp, and a connecting rod 21 is set between the moving push block 20 and the docking clamp, which is hinged to both of them, so that the third threaded rod 19 can push the moving push block 20 to move after rotation, and the moving push block 20 will push the docking clamp and the lifting plate 3 to rotate through the connecting rod 21 after movement, thereby synchronously changing the angles of the placement table 4 and the fixing block 5 above the lifting plate 3, so that the clamped automobile parts can also be tilted, and the device can be adjusted at multiple angles by cooperating with the rotatable first rotating table 2 installed on the top surface of the base plate 1 and the rotatable second rotating table 14 set on the top surface of the lifting plate 3.

[0027] Furthermore, a second motor 12 is fixedly installed in the middle position of the bottom surface of the base plate 1 , and the second motor 12 is transmission-connected to the first rotating platform 2 . A first motor 7 is fixedly installed on the side wall of the first rotating platform 2 , and the first motor 7 is transmission-connected to the third threaded rod 19 .

[0028] By arranging the second motor 12 and the first motor 7, and arranging the second motor 12 and the first motor 7 to be transmission-connected to the first rotating platform 2 and the third threaded rod 19 respectively, most of the driving of the device does not require manpower, thereby reducing manpower consumption.

[0029] Furthermore, a third motor 16 is fixedly installed in the middle position of the bottom surface of the placement table 4, and the top of the third motor 16 is transmission-connected with a driving bevel gear 23. A square groove is opened on the top surface of the placement table 4, and a rotatable second threaded rod 17 is installed on the side wall of the square groove. A movable slide 18 is threadedly connected to the outer wall of the second threaded rod 17, and a driven bevel gear 22 is fixedly connected to the end of the second threaded rod 17, and the driven bevel gear 22 and the driving bevel gear 23 are meshed with each other.

[0030] By setting a third motor 16 to be transmission-connected to the driving bevel gear 23, and the driven bevel gear 22 and the driving bevel gear 23 are meshed with each other, the driving bevel gear 23 can drive the two second threaded rods 17 to rotate at the same time through the two driven bevel gears 22 after rotation, and the movable slide 18 is located in the square groove and is threadedly connected to the outer wall of the second threaded rod 17. Therefore, when the driven bevel gear 22 rotates, the two symmetrically arranged movable slides 18 can move synchronously relative to or toward each other.

[0031] It should be noted that the retaining block 5 is fixedly mounted on the top surface of the movable slide 18 , and a protective cover 15 is fixedly mounted at the middle position of the top surface of the placement table 4 .

[0032] By setting the retaining block 5 to be fixedly installed on the top surface of the movable slide 18, when the user drives the two movable slides 18 to move, the two retaining blocks 5 will also move synchronously, so that the device can quickly fix the automobile parts.

[0033] During specific implementation, the automobile accessories are placed between the retaining blocks 5, the third motor 16 drives the driving bevel gear 23 to rotate, and the second threaded rod 17 is driven to rotate synchronously through the driven bevel gear 22, and the movable slide 18 moves laterally along the square groove of the placement table 4, so that the two retaining blocks 5 clamp the accessories to complete the initial fixation.

[0034] Then, the overall situation of the device is adjusted according to the specific situation of the parts. First, the second motor 12 drives the first rotating table 2 to rotate around the center of the bottom plate 1, driving the entire fixture to adjust 360° in the horizontal direction to align the weld with the welding machine. Then, the first motor 7 is used to drive the third threaded rod 19 to rotate, and the push block 20 is moved axially along the third threaded rod 19. The lifting plate 3 is pushed to flip around the hinge point of the connecting block 13 through the connecting rod 21. Finally, the second rotating table 14 rotates on the top surface of the lifting plate 3, and the placement table 4 is driven to further rotate in the vertical plane through the support block 6. The three can cooperate to realize multi-angle adjustment after the parts are fixed, so that the welds of automotive parts are not prone to undercutting.

[0035] Through the linkage of the first rotating table 2, the lifting plate 3, and the second rotating table 14, multi-dimensional adjustment of the horizontal plane, vertical plane, and tilt angle is achieved, which solves the limitation that the traditional clamp can only translate or rotate on a single axis, increases the application range of the device, and reduces the occurrence of undercuts during welding.

[0036] Embodiment 2 Based on Example 1, please refer to Figure 1-7 A welding fixture for automobile parts, a mounting box 24 is fixedly installed on the top surface of the retaining block 5, a pressing block 25 is hinged inside the mounting box 24, a square notch is opened at the bottom of the pressing block 25, and straight notches 26 are opened on both sides of the inner wall of the square notch.

[0037] Furthermore, the rear end of the mounting box 24 is threadedly connected to a threaded pull rod 29, one end of the threaded pull rod 29 is connected to a rotatable docking sleeve 28, and the end of the docking sleeve 28 away from the first threaded rod 9 is fixedly connected to a round rod 27, which is simultaneously located inside the two straight slots 26 in the initial state.

[0038] By setting the rear end of the installation box 24 to be threadedly connected with a threaded pull rod 29, one end of the threaded pull rod 29 is connected to a rotatable docking sleeve 28, so that the user can drive the docking sleeve 28 to move after rotating the threaded pull rod 29, and the end of the docking sleeve 28 away from the first threaded rod 9 is fixedly connected to a round rod 27, and the round rod 27 is simultaneously located inside the two straight slots 26 in the initial state. Therefore, the docking sleeve 28 cannot rotate with the threaded pull rod 29, and the rotation of the threaded pull rod 29 can only drive the docking sleeve 28 hinge round rod 27 to move.

[0039] During specific implementation, when fixing some automobile parts, the clamping of the retaining block 5 alone may not be able to completely fix the parts. At this time, the user can rotate the threaded pull rod 29. After the threaded pull rod 29 is rotated, it will drive the docking sleeve 28 to move backward together. The docking sleeve 28 is fixedly connected to the round rod 27, and the round rod 27 is inside the straight groove 26. Therefore, the round rod 27 will drive the pressure block 25 to move through the straight groove 26. The pressure block 25 is hinged on the inner wall of the installation box 24 and cannot move. Therefore, it can only rotate inside the installation box 24 with the cooperation of the straight groove 26 and the round rod 27, thereby resisting and fixing the top of the automobile parts, so that the automobile parts are further fixed and will not easily fall out of the device.

[0040] By providing the straight notch 26 and the round rod 27, the user can further fix the automobile accessories to prevent them from loosening during the welding process, thereby reducing the generation of welding defective products.

[0041] In addition, a mounting plate 8 is fixedly installed at the edge of the top surface of the lifting plate 3, and a first threaded rod 9 is threadedly connected to the side wall of the mounting plate 8. A rotatable connecting sleeve 11 is connected to one end of the first threaded rod 9 close to the placement table 4. A fixing plate 10 is fixedly connected to one end of the first threaded rod 9 of the connecting sleeve 11. The specific shape of the fixing plate 10 is an arc. A plurality of triangular notches are provided on the outer wall of the fixing plate 10 close to the placement table 4. The fixing plate 10 fits tightly against the second rotating table 14 and the side walls of the placement table 4 in the initial state.

[0042] 9 will move laterally after rotation, and the connecting sleeve 11 connected to the rear side of the fixing plate 10 can be rotatably connected to the first threaded rod 9. Therefore, during the rotation and movement of the first threaded rod 9, the first threaded rod 9 will drive the fixing plate 10 and the connecting sleeve 11 to move, so that the fixing plate 10 is close to or away from the placement table 4. When the fixing plate 10 is away from the placement table 4, the placement table 4 can rotate freely. When the fixing plate 10 is tightly attached to the placement table 4, the placement table 4 will not easily rotate without human power due to the friction between the two.

[0043] In addition, a beneficial effect not mentioned in the above embodiment is that when the lifting plate 3 is tilted as a whole, a small amount of welding slag produced by welding will not easily stay on the surface of the device under the action of gravity, thereby reducing the difficulty of subsequent cleaning of the device. At the same time, when the device does not need to be tilted for use, the first motor 7 can be started after the device is used to tilt the lifting plate 3, thereby pouring down the welding slag on the surface of the device, which also reduces the difficulty of cleaning the device.

[0044] In addition, the rear ends of the connecting sleeve 11 and the threaded pull rod 29 are fixedly connected to a circular knob, and four semi-arc grooves are opened on the outer wall of the circular knob. The four semi-arc grooves are distributed in a circular array. The specific number of support blocks 6 is four, and the four support blocks 6 are distributed in a circular array on the top surface of the second rotating table 14.

[0045] By setting a circular knob and opening four semi-arc grooves on the outer wall of the circular knob, the user can more easily rotate the connecting sleeve 11 and the threaded pull rod 29. The specific number of support blocks 6 is four and the four support blocks 6 are distributed in a circular array on the top surface of the second rotating table 14, so that the support blocks 6 can more stably support the placement table 4.

[0046] What is not mentioned in the above content is that by making the retaining block 5 movable, the lateral adjustment range of the retaining block 5 is improved, the pressure block 25 can adapt to plates of greater thickness, and is compatible with more than 20 accessories such as engine brackets and intake manifolds, thereby increasing the scope of application of the device.

[0047] Working principle: Place the auto parts between the retaining blocks 5, the third motor 16 drives the driving bevel gear 23 to rotate, and drives the second threaded rod 17 to rotate synchronously through the driven bevel gear 22, and the moving slide 18 moves laterally along the square groove of the placement table 4, so that the two retaining blocks 5 clamp the parts to complete the initial fixation.

[0048] Then, the overall situation of the device is adjusted according to the specific situation of the parts. First, the second motor 12 drives the first rotating table 2 to rotate around the center of the bottom plate 1, driving the entire fixture to adjust 360° in the horizontal direction to align the weld with the welding machine. Then, the first motor 7 is used to drive the third threaded rod 19 to rotate, and the push block 20 is moved axially along the third threaded rod 19. The lifting plate 3 is pushed to flip around the hinge point of the connecting block 13 through the connecting rod 21. Finally, the second rotating table 14 rotates on the top surface of the lifting plate 3, and the placement table 4 is driven to further rotate in the vertical plane through the support block 6. The three can cooperate to realize multi-angle adjustment after the parts are fixed, so that the welds of automotive parts are not prone to undercutting.

[0049] Through the linkage of the first rotating table 2, the lifting plate 3, and the second rotating table 14, multi-dimensional adjustment of the horizontal plane, vertical plane, and tilt angle is achieved, which solves the limitation that the traditional clamp can only translate or rotate on a single axis, increases the application range of the device, and reduces the occurrence of undercuts during welding.

[0050] When fixing some automobile parts, the clamping of the retaining block 5 alone may not be able to completely fix the parts. At this time, the user can rotate the threaded pull rod 29. After the threaded pull rod 29 is rotated, it will drive the docking sleeve 28 to move backward together. The docking sleeve 28 is fixedly connected to the round rod 27, and the round rod 27 is inside the straight groove 26. Therefore, the round rod 27 will drive the pressure block 25 to move through the straight groove 26. The pressure block 25 is hinged on the inner wall of the installation box 24 and cannot move. Therefore, it can only rotate inside the installation box 24 with the cooperation of the straight groove 26 and the round rod 27, thereby resisting and fixing the top of the automobile parts, so that the automobile parts are further fixed and will not easily fall out of the device.

[0051] By providing the straight slot 26 and the round rod 27, when the user rotates the threaded pull rod 29, the round rod 27 moves along the guide track of the straight slot 26. This linear motion is converted into a rotational torque of the pressing block 25 around the hinge axis through the lever principle, so that the device can further fix the automobile parts to prevent them from loosening during the welding process, thereby reducing the generation of welding defective products.

Claims

1. An automobile parts welding fixture, comprising a base plate (1) and a retaining block (5), characterized in that: A rotatable first rotating table (2) is installed on the top surface of the base plate (1), a connecting block (13) is fixedly installed on the top surface of the first rotating table (2), a lifting plate (3) is hinged on the inner wall of the connecting block (13), a mounting groove is opened in the middle position of the top surface of the first rotating table (2), a rotatable third threaded rod (19) is arranged inside the mounting groove, a movable push block (20) is threadedly connected on the outer wall of the third threaded rod (19), a docking clamping block is connected to the bottom of the lifting plate (3), a connecting rod (21) is connected between the movable push block (20) and the docking clamping block and is hinged to both, a rotatable second rotating table (14) is installed in the middle position of the top surface of the lifting plate (3), a supporting block (6) is fixedly installed on the top surface of the second rotating table (14), a placing table (4) is fixedly installed on the top surface of the supporting block (6), and the retaining block (5) is arranged on the top surface of the placing table (4).

2. The automobile parts welding fixture according to claim 1, characterized in that: A second motor (12) is fixedly mounted at the middle position of the bottom surface of the base plate (1), the second motor (12) being transmission-connected to the first rotating platform (2), a first motor (7) being fixedly mounted on the side wall of the first rotating platform (2), the first motor (7) being transmission-connected to the third threaded rod (19).

3. The automobile parts welding fixture according to claim 2, characterized in that: A third motor (16) is fixedly mounted in the middle of the bottom surface of the placement table (4); the top of the third motor (16) is transmission-connected to a driving bevel gear (23); a square groove is provided on the top surface of the placement table (4); a rotatable second threaded rod (17) is mounted on the side wall of the square groove; a movable slide (18) is threadedly connected to the outer wall of the second threaded rod (17); a driven bevel gear (22) is fixedly connected to the end of the second threaded rod (17); the driven bevel gear (22) and the driving bevel gear (23) are meshed with each other.

4. The automobile parts welding fixture as claimed in claim 3, characterized in that: The retaining block (5) is fixedly mounted on the top surface of the movable slide (18), and a protective cover (15) is fixedly mounted at the middle position of the top surface of the placement platform (4).

5. The automobile parts welding fixture according to claim 1, characterized in that: A mounting plate (8) is fixedly mounted on the edge of the top surface of the lifting plate (3); a first threaded rod (9) is threadedly connected to the side wall of the mounting plate (8); a rotatable connecting sleeve (11) is connected to one end of the first threaded rod (9) close to the placement table (4); and a retaining plate (10) is fixedly connected to one end of the connecting sleeve (11) and the first threaded rod (9).

6. The automobile parts welding fixture according to claim 5, characterized in that: The specific shape of the retaining plate (10) is an arc, and a plurality of triangular notches are provided on the outer wall of the retaining plate (10) close to the placement table (4). In the initial state, the retaining plate (10) is tightly fitted on the side walls of the second rotating table (14) and the placement table (4).

7. The automobile parts welding fixture according to claim 6, characterized in that: A mounting box (24) is fixedly mounted on the top surface of the retaining block (5), a pressing block (25) is hingedly mounted inside the mounting box (24), a square notch is formed at the bottom of the pressing block (25), and straight notches (26) are formed on both sides of the inner wall of the square notch.

8. The automobile parts welding fixture according to claim 7, characterized in that: The rear end of the installation box (24) is threadedly connected to a threaded pull rod (29), one end of the threaded pull rod (29) is connected to a rotatable docking sleeve (28), and one end of the docking sleeve (28) away from the first threaded rod (9) is fixedly connected to a round rod (27), and the round rod (27) is simultaneously located inside the two straight notches (26) in an initial state.

9. The automobile parts welding fixture according to claim 8, characterized in that: The rear ends of the connecting sleeve (11) and the threaded pull rod (29) are fixedly connected to a circular knob, and the outer wall of the circular knob is provided with four semi-arc grooves, which are distributed in a circular array.

10. The automobile parts welding fixture according to claim 1, characterized in that: The specific number of the support blocks (6) is four, and the four support blocks (6) are distributed in a circular array on the top surface of the second rotating table (14).

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