Automobile part welding fixture

Abstract

The invention belongs to the technical field of welding fixtures, and discloses an automobile part welding fixture which comprises a base, a welding table is movably mounted at the top end of the base, a first vertical plate is fixedly mounted on the left side of the top end of the welding table, and a second vertical plate is movably mounted on the right side of the top end of the welding table. The first vertical plate and the second vertical plate are internally and movably sleeved with rotating discs correspondingly. By arranging the rotating disc, the tooth ring, the driving motor, the convex rods and the gears, after the driving motor is started, the convex rods rotate, so that the two gears rotate along with the convex rods, and due to the fact that the outer surfaces of the gears and the outer surface of the tooth ring are connected in a meshed mode, the gears rotate along with rotation of the gears; the two tooth rings drive the two rotating discs to rotate along the inner surface of the first vertical plate and the inner surface of the second vertical plate correspondingly, so that automatic overturning of the automobile parts can be achieved, and the welding efficiency of the automobile parts is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of welding jigs, and particularly relates to a welding jig for automobile parts. Background Art

[0002] Welding, also known as fusion welding, is a manufacturing process and technology for joining metals or other thermoplastic materials such as plastics by means of heating, high temperature or high pressure. There are many energy sources for modern welding, including gas flames, electric arcs, lasers, electron beams, friction, and ultrasonic waves. According to the characteristics of its process, it is divided into three categories: fusion welding, pressure welding, and brazing.

[0003] During the processing of automobile parts, welding equipment is required to perform the welding operation of two parts. In order to ensure the stability during the welding process, corresponding welding jigs are needed. In the actual use process of the existing welding jigs, most of them adopt a fixed design. As a result, after one side of the automobile part is welded, the operator needs to disassemble the automobile part, turn it over to the other side, and then clamp and fix it again. Subsequently, the welding of the other side is carried out. This operation method is not only time-consuming and laborious, but also reduces the welding efficiency. Therefore, it needs to be improved. Summary of the Invention

[0004] The purpose of the present invention is to provide a welding jig for automobile parts to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the present invention provides the following technical solution: A welding jig for automobile parts, including a base, a welding table is movably installed at the top of the base, a first vertical plate is fixedly installed on the left side of the top of the welding table, a second vertical plate is movably installed on the right side of the top of the welding table, turntables are movably sleeved inside the first vertical plate and the second vertical plate respectively, the number of turntables is two, tooth rings are fixedly sleeved on the outer surfaces of the two turntables respectively, the number of tooth rings is two, the two tooth rings are respectively movably sleeved on the inner surfaces of the first vertical plate and the second vertical plate, first air cylinders are fixedly installed at the bottom of the opposite sides of the two turntables respectively, a clamping block is fixedly installed at the top of the first air cylinder, the number of clamping blocks is two, the two clamping blocks are respectively movably sleeved at the top inside the two turntables, support blocks are fixedly installed at the bottom of the opposite sides of the two turntables respectively, a driving motor is fixedly installed at the front side of the bottom of the left end of the first vertical plate, a convex rod is fixedly sleeved at the other end of the output shaft of the driving motor, the right end of the convex rod penetrates through the first vertical plate and the second vertical plate and extends to the outside of the second vertical plate, gears are movably sleeved on the left and right sides of the outer surface of the convex rod respectively, the number of gears is two, the two gears are respectively movably sleeved on the inner surfaces of the first vertical plate and the second vertical plate, and the outer surfaces of the two gears are respectively meshed with the outer surfaces of the two tooth rings.

[0006] Preferably, a first power motor is fixedly installed at the right end of the welding table. The other end of the output shaft of the first power motor is fixedly sleeved with a first threaded rod. The left end of the first threaded rod penetrates through the welding table and the second vertical plate and extends to the left end of the welding table. The outer surface of the first threaded rod is threadedly sleeved with the inner surface of the bottom end of the second vertical plate.

[0007] Preferably, a long groove is formed in the middle of the inner wall at the rear side of the base. A round rod is movably sleeved in the middle of the long groove. A vertical block is fixedly sleeved on the front side of the outer surface of the round rod. The outer surface of the vertical block is movably sleeved with the inner surface of the base. The top end of the vertical block is fixedly connected to the bottom end of the welding table.

[0008] Preferably, a first motor is fixedly installed at the bottom of the inner wall on the right side of the base. The other end of the output shaft of the first motor is fixedly sleeved with a rotating shaft. The right end of the rotating shaft penetrates through the base and extends to the outside of the base and is fixedly sleeved with a rotating rod. The bottom of the inner surface of the rotating rod is movably sleeved with the right side of the outer surface of the round rod. The left end of the rotating rod is movably connected to the right end of the base.

[0009] Preferably, fixing frames are respectively fixedly installed at the left and right ends of the front end of the base. The number of the fixing frames is two. Cross bars are respectively movably sleeved at the upper and lower ends inside the two fixing frames. The number of the cross bars is two. Installation blocks are respectively fixedly installed at the left and right ends of the two cross bars. The outer surface of the installation block is movably connected to the outer surface of the fixing frame.

[0010] Preferably, a second motor is fixedly installed at the right side of the middle of the front end of the base. The other end of the output shaft of the second motor is fixedly sleeved with a lead screw.

[0011] Preferably, a rectangular block is threadedly sleeved on the right side of the outer surface of the lead screw. The rear end of the rectangular block is movably connected to the front end of the base. Oblique rods are respectively hinged at the upper and lower ends of the rectangular block. The number of the oblique rods is two. The other ends of the two oblique rods are respectively hinged to the middle of the opposite surfaces of the two cross bars.

[0012] Preferably, a back plate is fixedly installed at the bottom of the right end of the base. A second air cylinder is fixedly installed at the top end of the back plate. The bottom end of the second air cylinder penetrates through the back plate and extends to the inside of the back plate and is fixedly installed with a movable block. The right side of the outer surface of the movable block is movably sleeved with the top of the inner surface of the back plate.

[0013] Preferably, a second power motor is fixedly installed on the right side inside the movable block. The other end of the output shaft of the second power motor is fixedly sleeved with a second threaded rod. The left end of the second threaded rod penetrates through the movable block and extends to the left side of the movable block. A welding head is threadedly sleeved on the right side of the outer surface of the second threaded rod. The top of the outer surface of the welding head is movably sleeved with the inner surface of the movable block.

[0014] The beneficial effects of the present invention are as follows:

[0015] 1. By setting the turntable, toothed ring, drive motor, convex rod and gear in the present invention, when the drive motor is started, the convex rod will rotate, so that the two gears will rotate together driven by the convex rod. Since the outer surface of the gear is meshed with the outer surface of the toothed ring, as the gear rotates, the two toothed rings will respectively drive the two turntables to rotate along the inner surfaces of the first vertical plate and the second vertical plate, thereby realizing the automatic flipping of the automobile parts, and thus improving the welding efficiency of the automobile parts.

[0016] 2. By setting the long groove, round rod, vertical block, first motor and rotating rod in the present invention, when the first motor is started, the rotating shaft will drive the rotating rod to rotate. Since the inner surface of the rotating rod is movably sleeved with the outer surface of the round rod, as the rotating rod rotates, the inner surface of the rotating rod will generate a thrust on the outer surface of the round rod, pushing the round rod to drive the welding table to move along the inner surface of the long groove through the vertical block, thereby realizing the adjustment of the welding position, and thus improving the convenience of using the welding fixture.

[0017] 3. By setting the cross bar, second motor, lead screw, rectangular block and inclined rod in the present invention, when the second motor is started, the lead screw will rotate. Since the outer surface of the lead screw is threadedly sleeved with the inner surface of the rectangular block, as the lead screw rotates, the rectangular block will drive one end of the inclined rod to move, so that the other end of the inclined rod will generate a pulling force on the cross bar, pulling the two cross bars to drive the mounting blocks to move towards each other along the inner surface of the fixing frame respectively, thereby improving the convenience of installing the welding fixture. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the present invention;

[0019] Figure 2 is a schematic structural diagram of the bottom of the present invention;

[0020] Figure 3 is a schematic cross-sectional structural diagram of the front of the present invention;

[0021] Figure 4 is a schematic cross-sectional structural diagram of the convex rod of the present invention;

[0022] Figure 5Schematic cross-sectional structure diagram of the turntable of the present invention;

[0023] Figure 6 Schematic cross-sectional structure diagram of the side of the present invention;

[0024] Figure 7 is Figure 4 Partial enlarged structure diagram of part A in

[0025] In the figure: 1, base; 2, welding table; 3, first vertical plate; 4, second vertical plate; 5, turntable; 6, toothed ring; 7, first air cylinder; 8, clamping block; 9, support block; 10, driving motor; 11, convex rod; 12, gear; 13, first power motor; 14, first threaded rod; 15, long slot; 16, round rod; 17, vertical block; 18, first motor; 19, rotating shaft; 20, rotating rod; 21, fixing frame; 22, cross bar; 23, mounting block; 24, second motor; 25, lead screw; 26, rectangular block; 27, inclined rod; 28, back plate; 29, second air cylinder; 30, movable block; 31, second power motor; 32, second threaded rod; 33, welding head. Detailed implementation manners

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Such as Figures 1 to 7As shown in the figure, an embodiment of the present invention provides a welding fixture for automotive parts, including a base 1. A welding table 2 is movably installed at the top of the base 1. A first vertical plate 3 is fixedly installed on the left side of the top of the welding table 2. A second vertical plate 4 is movably installed on the right side of the top of the welding table 2. Inside the first vertical plate 3 and the second vertical plate 4 are respectively movably sleeved with turntables 5. The number of turntables 5 is two. On the outer surfaces of the two turntables 5 are respectively fixedly sleeved with toothed rings 6. The number of toothed rings 6 is two. The two toothed rings 6 are respectively movably sleeved on the inner surfaces of the first vertical plate 3 and the second vertical plate 4. At the bottom of the opposite sides of the two turntables 5 are respectively fixedly installed with first air cylinders 7. At the top of the first air cylinders 7 are fixedly installed with clamping blocks 8. The number of clamping blocks 8 is two. The two clamping blocks 8 are respectively movably sleeved at the top inside the two turntables 5. At the bottom of the opposite sides of the two turntables 5 are respectively fixedly installed with support blocks 9. At the front side of the bottom left end of the first vertical plate 3 is fixedly installed with a driving motor 10. At the other end of the output shaft of the driving motor 10 is fixedly sleeved with a convex rod 11. The right end of the convex rod 11 penetrates through the first vertical plate 3 and the second vertical plate 4 and extends to the outside of the second vertical plate 4. On the left and right sides of the outer surface of the convex rod 11 are respectively movably sleeved with gears 12. The number of gears 12 is two. The two gears 12 are respectively movably sleeved on the inner surfaces of the first vertical plate 3 and the second vertical plate 4. The outer surfaces of the two gears 12 are respectively meshed and connected with the outer surfaces of the two toothed rings 6.

[0028] When the driving motor 10 is started, the convex rod 11 will rotate. Since there are protrusions on the outer surface of the convex rod 11, driven by the convex rod 11, the two gears 12 will rotate. And because the two gears 12 are respectively meshed and connected with the outer surfaces of the two toothed rings 6, under the action of the gears 12, the two toothed rings 6 will respectively drive the two turntables 5 to rotate, thereby realizing the flipping of the automotive parts, so that there is no need for the operator to disassemble the parts to complete the welding on the other side, and thus the welding efficiency of the automotive parts is improved.

[0029] Reference Figures 1 to 6 As shown in the figure, a first power motor 13 is fixedly installed at the right end of the welding table 2. At the other end of the output shaft of the first power motor 13 is fixedly sleeved with a first threaded rod 14. The left end of the first threaded rod 14 penetrates through the welding table 2 and the second vertical plate 4 and extends to the left end of the welding table 2. The outer surface of the first threaded rod 14 is threadedly sleeved with the inner surface at the bottom end of the second vertical plate 4.

[0030] As a technical optimization scheme of the present invention, when the first power motor 13 is started, the first threaded rod 14 will rotate, thereby causing the second vertical plate 4 to move towards the first vertical plate 3.

[0031] Reference Figure 3 、 Figure 4 and Figure 6, a long groove 15 is formed in the middle of the inner wall at the rear side of the base 1. A round rod 16 is movably sleeved in the middle of the inner part of the long groove 15. A vertical block 17 is fixedly sleeved on the front side of the outer surface of the round rod 16. The outer surface of the vertical block 17 is movably sleeved with the inner surface of the base 1. The top end of the vertical block 17 is fixedly connected to the bottom end of the welding table 2.

[0032] As a technical optimization scheme of the present invention, when the round rod 16 is pushed, it will drive the vertical block 17 and the welding table 2 to move along the inner surface of the long groove 15.

[0033] Reference Figure 3 , Figure 4 and Figure 6 , a first motor 18 is fixedly installed at the bottom of the inner wall on the right side of the base 1. The other end of the output shaft of the first motor 18 is fixedly sleeved with a rotating shaft 19. The right end of the rotating shaft 19 penetrates through the base 1 and extends to the outside of the base 1 and is fixedly sleeved with a rotating rod 20. The bottom of the inner surface of the rotating rod 20 is movably sleeved with the right side of the outer surface of the round rod 16. The left end of the rotating rod 20 is movably connected to the right end of the base 1.

[0034] As a technical optimization scheme of the present invention, when the first motor 18 is started, it will cause the rotating shaft 19 to drive the rotating rod 20 to rotate, so that the rotating rod 20 generates a thrust on the round rod 16.

[0035] Reference Figures 1 to 6 , the left and right ends of the front end of the base 1 are respectively fixedly installed with fixing frames 21. The number of the fixing frames 21 is two. The upper and lower ends of the inner parts of the two fixing frames 21 are respectively movably sleeved with cross bars 22. The number of the cross bars 22 is two. The left and right ends of the two cross bars 22 are respectively fixedly installed with mounting blocks 23. The outer surface of the mounting blocks 23 is movably connected to the outer surface of the fixing frames 21.

[0036] As a technical optimization scheme of the present invention, the inner surface of the fixing frame 21 and the outer surface of the cross bar 22 are both smooth, ensuring that the cross bar 22 will not get stuck when moving along the inside of the fixing frame 21.

[0037] Reference Figures 2 to 6 , a second motor 24 is fixedly installed on the right side of the middle of the front end of the base 1. The other end of the output shaft of the second motor 24 is fixedly sleeved with a lead screw 25.

[0038] As a technical optimization scheme of the present invention, when the second motor 24 is started, it will cause the lead screw 25 to rotate.

[0039] Reference Figures 2 to 4 and Figure 6, a rectangular block 26 is threadedly sleeved on the right side of the outer surface of the lead screw 25. The rear end of the rectangular block 26 is movably connected to the front end of the base 1. The upper and lower ends of the rectangular block 26 are respectively hinged with inclined rods 27. The number of the inclined rods 27 is two, and the other ends of the two inclined rods 27 are respectively hinged to the middle parts of the opposite surfaces of the two cross rods 22.

[0040] As a technical optimization scheme of the present invention, when the lead screw 25 rotates, it will cause the rectangular block 26 to drive the inclined rods 27 to move, so that the inclined rods 27 generate a pulling force on the cross rods 22, pulling the two cross rods 22 to move towards each other.

[0041] Reference Figures 1 to 4 and Figure 6 , a back plate 28 is fixedly installed at the bottom of the right end of the base 1. A second air cylinder 29 is fixedly installed at the top of the back plate 28. The bottom end of the second air cylinder 29 penetrates through the back plate 28 and extends into the interior of the back plate 28 and is fixedly installed with a movable block 30. The right side of the outer surface of the movable block 30 is movably sleeved with the top of the inner surface of the back plate 28.

[0042] As a technical optimization scheme of the present invention, when the second air cylinder 29 is started, it will cause the movable block 30 to move along the inner surface of the back plate 28.

[0043] Reference Figure 1 , Figure 3 , Figure 4 and Figure 6 , a second power motor 31 is fixedly installed on the right side inside the movable block 30. The other end of the output shaft of the second power motor 31 is fixedly sleeved with a second threaded rod 32. The left end of the second threaded rod 32 penetrates through the movable block 30 and extends to the left side of the movable block 30. A welding head 33 is threadedly sleeved on the right side of the outer surface of the second threaded rod 32. The top of the outer surface of the welding head 33 is movably sleeved with the inner surface of the movable block 30.

[0044] As a technical optimization scheme of the present invention, when the second power motor 31 is started, it will cause the second threaded rod 32 to rotate, so that the welding head 33 moves along the inner surface of the movable block 30.

[0045] Working principle and usage process:

[0046] First, the operator starts the second motor 24 according to the installation position of the welding fixture, causing the lead screw 25 to rotate. As a result, the rectangular block 26 threadedly sleeved on the lead screw 25 drives the inclined rod 27 to move along the outer surface of the base 1. Furthermore, the other end of the inclined rod 27 generates a pulling force on the cross bar 22, pulling the two cross bars 22 with the mounting blocks 23 to move towards each other along the inner surface of the fixing frame 21 until the mounting blocks 23 are aligned with the installation position. Subsequently, the operator can use bolts to fix the welding fixture. With the mutual cooperation of each mechanism, the adjustment of the installation position of the welding fixture is achieved, thereby improving the convenience during the installation of the welding fixture.

[0047] Subsequently, the operator places the two automotive parts to be welded on the tops of the supporting blocks 9 on the first vertical plate 3 and the second vertical plate 4 respectively. Then, the operator starts the first pneumatic cylinder 7, causing the clamping block 8 to move towards the supporting block 9, thereby clamping and aligning the two automotive parts. Subsequently, the operator starts the first power motor 13, causing the first threaded rod 14 to rotate. At this time, under the action of the first threaded rod 14, the second vertical plate 4 will move towards the first vertical plate 3, thereby fitting the two automotive parts. Subsequently, the operator starts the second pneumatic cylinder 29 and the second power motor 31, and the welding operation can be completed through the welding head 33. During the welding process, the operator starts the first motor 18, causing the rotating shaft 19 to drive the rotating rod 20 to rotate. As a result, the inner surface of the rotating rod 20 generates a pushing force on the outer surface of the round rod 16, pushing the round rod 16 with the vertical block 17 and the welding table 2 to move along the inner surface of the long groove 15, thereby achieving the adjustment of the welding position.

[0048] When one side of the automotive part is welded, the operator starts the second pneumatic cylinder 29 to reset the movable block 30. Then, the operator starts the drive motor 10, causing the convex rod 11 to rotate. At this time, driven by the convex rod 11, the gear 12 will rotate, causing the toothed ring 6 meshed with the gear 12 to drive the turntable 5 to rotate together, thereby completing the flipping of the automotive part. Subsequently, the operator starts the second pneumatic cylinder 29, the movable block 30 and the first motor 18 again, and the welding operation on the other side of the automotive part can be completed. With the mutual cooperation of each mechanism, the operator can complete the welding on the other side without disassembling the part, thereby improving the welding efficiency of the automotive part.

[0049] It should be noted that, in this document, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variation thereof are intended to cover non-exclusive inclusion, such that a process, method, article or apparatus comprising a series of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article or apparatus.

[0050] Although the embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An automobile parts welding fixture, comprising a base (1), characterized in that: A welding platform (2) is movably mounted on the top of the base (1), a first vertical plate (3) is fixedly mounted on the left side of the top of the welding platform (2), a second vertical plate (4) is movably mounted on the right side of the top of the welding platform (2), a rotating disk (5) is movably sleeved inside the first vertical plate (3) and the second vertical plate (4), two of the rotating disks (5), toothed rings (6) are fixedly sleeved on the outer surfaces of the two rotating disks (5), two of the toothed rings (6), two of the toothed rings (6), and the two toothed rings (6) are movably sleeved on the inner surfaces of the first vertical plate (3) and the second vertical plate (4), respectively, a first pneumatic cylinder (7) is fixedly mounted on the bottom of the opposite sides of the two rotating disks (5), a clamping block (8) is fixedly mounted on the top of the first pneumatic cylinder (7), two of the clamping blocks (8), and two of the two The clamping blocks (8) are respectively movably sleeved on the top ends of the two rotating disks (5); the bottom ends of the opposite surfaces of the two rotating disks (5) are respectively fixedly mounted with support blocks (9); the front side of the bottom end of the left end of the first vertical plate (3) is fixedly mounted with a driving motor (10); the other end of the output shaft of the driving motor (10) is fixedly sleeved with a convex rod (11); the right end of the convex rod (11) penetrates the first vertical plate (3) and the second vertical plate (4) and extends to the outside of the second vertical plate (4); the left and right sides of the outer surface of the convex rod (11) are respectively movably sleeved with gears (12); the number of the gears (12) is two; the two gears (12) are respectively movably sleeved on the inner surfaces of the first vertical plate (3) and the second vertical plate (4); the outer surfaces of the two gears (12) are respectively meshed with the outer surfaces of the two toothed rings (6).

2. The automobile parts welding fixture according to claim 1, characterized in that: A first power motor (13) is fixedly mounted on the right end of the welding table (2); a first threaded rod (14) is fixedly sleeved on the other end of the output shaft of the first power motor (13); the left end of the first threaded rod (14) passes through the welding table (2) and the second vertical plate (4) and extends to the left end of the welding table (2); the outer surface of the first threaded rod (14) is threadedly sleeved on the inner surface of the bottom end of the second vertical plate (4).

3. The automobile parts welding fixture according to claim 1, characterized in that: A long groove (15) is provided in the middle of the inner wall at the rear side of the base (1); a round rod (16) is movably sleeved at the middle end of the long groove (15); a vertical block (17) is fixedly sleeved at the front side of the outer surface of the round rod (16); the outer surface of the vertical block (17) is movably sleeved with the inner surface of the base (1); and the top end of the vertical block (17) is fixedly connected to the bottom end of the welding platform (2).

4. The automobile parts welding fixture according to claim 1, characterized in that: A first motor (18) is fixedly mounted on the bottom of the right inner wall of the base (1); the other end of the output shaft of the first motor (18) is fixedly sleeved with a rotating shaft (19); the right end of the rotating shaft (19) passes through the base (1) and extends to the outside of the base (1) and is fixedly sleeved with a rotating rod (20); the bottom of the inner surface of the rotating rod (20) is movably sleeved with the right side of the outer surface of the round rod (16); and the left end of the rotating rod (20) is movably connected to the right end of the base (1).

5. The automobile parts welding fixture according to claim 1, characterized in that: The left and right ends of the front end of the base (1) are respectively fixedly mounted with fixing frames (21), the number of the fixing frames (21) is two, the upper and lower ends of the inside of the two fixing frames (21) are respectively movably sleeved with cross bars (22), the number of the cross bars (22) is two, the left and right ends of the two cross bars (22) are respectively fixedly mounted with mounting blocks (23), and the outer surface of the mounting block (23) is movably connected to the outer surface of the fixing frame (21).

6. The automobile parts welding fixture according to claim 1, characterized in that: A second motor (24) is fixedly mounted on the right side of the middle portion of the front end of the base (1), and a lead screw (25) is fixedly sleeved on the other end of the output shaft of the second motor (24).

7. The automobile parts welding fixture according to claim 6, characterized in that: A rectangular block (26) is threadedly sleeved on the right side of the outer surface of the lead screw (25), the rear end of the rectangular block (26) is movably connected to the front end of the base (1), and the upper and lower ends of the rectangular block (26) are respectively hinged with inclined rods (27), the number of the inclined rods (27) is two, and the other ends of the two inclined rods (27) are respectively hinged to the middle parts of the opposite surfaces of the two cross bars (22).

8. The automobile parts welding fixture according to claim 1, characterized in that: A back plate (28) is fixedly mounted at the bottom of the right end of the base (1), a second pneumatic cylinder (29) is fixedly mounted at the top of the back plate (28), the bottom end of the second pneumatic cylinder (29) passes through the back plate (28) and extends to the inside of the back plate (28) and is fixedly mounted with a movable block (30), and the right side of the outer surface of the movable block (30) is movably connected to the top of the inner surface of the back plate (28).

9. The automobile parts welding fixture according to claim 8, characterized in that: A second power motor (31) is fixedly installed on the right side inside the movable block (30); a second threaded rod (32) is fixedly sleeved on the other end of the output shaft of the second power motor (31); the left end of the second threaded rod (32) passes through the movable block (30) and extends to the left side of the movable block (30); a welding head (33) is threadedly sleeved on the right side of the outer surface of the second threaded rod (32); and the top of the outer surface of the welding head (33) is movably sleeved on the inner surface of the movable block (30).

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