Automobile part welding fixture

Abstract

The utility model relates to the technical field of automobile part machining, and discloses an automobile part welding clamp which comprises a table top, a first sliding rail above the table top and a lead screw, a clamp part is arranged above the first sliding rail, the lead screw penetrates through the clamp part and is connected with the clamp part in a meshed mode, the clamp part comprises a first clamping plate and an inclined face, and a clamping base and a second clamping plate move on the inclined face. A clamping head is arranged at the bottom of the second clamping plate, a spring is connected to the bottom of the clamping base, the other end of the spring is connected with the moving block, clamp parts are arranged on the two sides of a lead screw, and the lead screws are arranged on the two sides of the table top in the length direction respectively. The clamping head is driven by the second clamping plate to move so that the first clamping plate can be pressed and loosened, a thin to-be-welded workpiece can be clamped and positioned, the second clamping plate can slide on the inclined face, feeding of the to-be-welded workpiece is facilitated, the second clamping plate is prevented from being blocked, and the two clamping parts can move back to back and face to face through the two screw rods with the two symmetrical threads. And the clamping device is suitable for clamping workpieces to be welded with different lengths.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts processing technology, and in particular to automotive parts welding fixtures. Background Technology

[0002] Currently, welding robots are widely used in the industrial welding field. Welding robots can improve the processing accuracy of workpieces and labor productivity, reduce the labor intensity of welding workers, and perform welding operations in hazardous working environments. In the application of laser welding, fixtures play a very important role in the welding quality and precision of workpieces. In the welding of automotive parts, the welding fixtures used mostly use clamping devices fixed to the base plate to clamp and position the automotive parts. In the actual production process, there will be situations where the dimensions of two workpieces to be welded differ significantly. In this case, it is difficult to ensure that the center lines of the two parts are aligned before welding, resulting in welding misalignment, unsightly welds, and other problems.

[0003] According to the description in the automotive parts welding fixture published on the patent website (authorization announcement number: CN218983625U), "An automotive parts welding fixture includes: a base and a first clamping assembly and a second clamping assembly respectively mounted on the base. The first clamping assembly is used to clamp a first automotive part, and the second clamping assembly is used to clamp a second automotive part to be welded to the first automotive part. The first clamping assembly and the second clamping assembly, which are symmetrically arranged, each include: a carrier plate, a motor mounted on one end of the carrier plate, and a fixed seat mounted on the other end of the carrier plate. The other end of a lead screw connected to the output shaft of the motor is rotatably connected to the fixed seat through a bearing."

[0004] Regarding the above description, the applicant believes the following issues exist:

[0005] During use, the present invention has a problem: the base and the first and second clamping components mounted on the base, the first clamping component for clamping the first automotive part and the second clamping component for clamping the second automotive part to be welded to the first automotive part, tend to pass over the workpiece when it is low in height, failing to effectively clamp the workpiece. Bringing the first and second clamping components to the table surface to reduce their height causes wear on the table surface. Therefore, an improved automotive part welding fixture is needed to solve the above problems. Utility Model Content

[0006] In order to overcome the problem that in the prior art, when facing a workpiece with a low height, the first clamping component and the second clamping component will pass over the workpiece and fail to clamp it effectively.

[0007] The technical solution of this utility model is as follows: a welding fixture for automotive parts, including a table, support legs at the bottom of the table, foot cups at the bottom of the support legs, a slide rail and a lead screw above the table, the threads on both sides of the lead screw are symmetrical, a clamping part is provided above the slide rail, the lead screw passes through the clamping part and is engaged with the clamping part, the clamping part includes a clamping plate, a slope is provided on the side of the clamping plate away from the center of the table, a clamping seat and a clamping plate are movable on the slope, a chuck is provided at the bottom of the clamping plate, the chuck can contact the clamping plate, a spring is connected to the bottom of the clamping seat, the other end of the spring is connected to a moving block, clamping parts are provided on both sides of a lead screw, and lead screws are provided on both sides of the table along the length direction.

[0008] Preferably, the lead screw is fixed with a fixed seat at each end, and a motor seat is provided at the end of one of the fixed seats away from the lead screw. A motor is installed on the side of the motor seat away from the fixed seat. The motor includes an output end, which is connected to the lead screw through a coupling. The clamping part includes a moving block, and the moving block is provided with a threaded hole corresponding to the lead screw.

[0009] Preferably, the top of the tabletop is provided with a mounting plate, the slide rail is located on the top of the mounting plate, the mounting plate is connected to the tabletop by bolts, and the bottom of the movable block is provided with a slide groove corresponding to the slide rail.

[0010] Preferably, the moving block has an inclined surface above it, a second slide rail is installed on the inclined surface, and the bottom of the clamping seat has a second slide groove corresponding to the second slide rail.

[0011] Preferably, the bottom of the clamping seat is provided with a second connector, and one side of the moving block is provided with a mounting groove. The first connector is fixed in the mounting groove, and a spring is coupled between the second connector and the first connector. The spring can pull the clamping seat to move downward.

[0012] Preferably, a mounting block is provided on one side of the movable block, and a top block is provided on the same side of the mounting block corresponding to the clamping seat above the movable block. The mounting block is provided with a mounting hole, in which a cylinder can be installed, and the output end of the cylinder can contact the top block.

[0013] Preferably, connector two and connector one are set screws with radial through holes, and the two ends of the spring are hooks that can be inserted into the through holes of connector two and connector one respectively. Connector two is rotatably engaged with the clamping seat, and connector one is rotatably engaged with the moving block.

[0014] The beneficial effects of this utility model are as follows: Compared with the transverse clamping assembly formed by the first clamping assembly and the second clamping assembly in the prior art, the clamping plate 2 drives the chuck to move to achieve the clamping and loosening of the clamping plate 1, which can clamp and position thin workpieces to be welded. The clamping plate 2 can slide on the inclined surface, which facilitates the feeding of the workpiece to be welded and prevents the clamping plate 2 from blocking the workpiece. The spring tensioning of the clamping seat reduces the cylinder from being stuck in the middle stroke and extends the service life of the cylinder. The two screws with symmetrical threads enable the two clamping parts to move in opposite directions, which can adapt to the clamping of workpieces of different lengths to be welded. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the mounting plate structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the fixing base structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the clamp structure of this utility model;

[0019] Figure 5 This is a schematic diagram of the spring structure of this utility model.

[0020] Explanation of reference numerals in the attached drawings: 1. Tabletop; 11. Support leg; 12. Foot cup; 21. Fixed seat; 22. Lead screw; 23. Motor; 24. Motor base; 25. Coupling; 26. Mounting plate; 261. Slide rail one; 31. Moving block; 311. Slide groove one; 312. Threaded hole; 32. Clamping plate one; 33. Inclined surface; 331. Slide rail two; 3311. Connector one; 3312. Spring; 332. Mounting block; 3321. Mounting hole; 333. Mounting groove; 34. Cylinder; 351. Clamping seat; 3511. Top block; 3512. Connector two; 3513. Slide groove two; 352. Clamping plate two; 3521. Clamp. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0022] Please see Figures 1-5This utility model provides an embodiment of an automotive parts welding fixture, including a table 1, support legs 11 at the bottom of the table 1, and foot cups 12 at the bottom of the support legs 11. It also includes a slide rail 261 above the table 1 and a lead screw 22. The threads on both sides of the lead screw 22 are symmetrical. A clamping part is provided above the slide rail 261, through which the lead screw 22 passes and engages with the clamping part. The clamping part includes a clamping plate 32, with an inclined surface 33 on the side of the clamping plate 32 away from the center of the table 1. A clamping seat 351 and a clamping plate 352 move on the inclined surface 33. A chuck 3521 is provided at the bottom of the clamping plate 352, and the chuck 3521 can contact the clamping plate 32. A spring 3 is connected to the bottom of the clamping seat 351. 312, the other end of the spring 3312 is connected to the moving block 31. A screw 22 has clamping parts on both sides. The table 1 has screws 22 on both sides along the length direction. The clamping plate 252 drives the chuck 3521 to move, thereby pressing and releasing the clamping plate 1 32. It can clamp and position thin workpieces to be welded. The clamping plate 252 can slide on the inclined plane 33, which facilitates the feeding of the workpiece to be welded and prevents the clamping plate 252 from blocking. The spring 3312 pulls the clamping seat 351 to reduce the cylinder 34 from being stuck in the middle stroke and extend the service life of the cylinder 34. The two screws 22 with symmetrical threads realize the two clamping parts to move in opposite directions, which can adapt to the clamping of workpieces of different lengths to be welded.

[0023] Please see Figures 1-4In this embodiment, fixed seats 21 are fixed at both ends of the lead screw 22. A motor seat 24 is provided at one end of the fixed seat 21 away from the lead screw 22. A motor 23 is mounted on the side of the motor seat 24 away from the fixed seat 21. The motor 23 includes an output end, which is connected to the lead screw 22 via a coupling 25. The clamping part includes a moving block 31, which has a threaded hole 312 corresponding to the lead screw 22. The coupling 25 connects the output end of the motor 23 to the lead screw 22, reducing the risk of sudden stop of the motor 23 due to impact from the clamping part. To extend the service life of motor 23, a mounting plate 26 is provided on the top of the table 1, and slide rail 261 is located on top of the mounting plate 26. The mounting plate 26 is connected to the table 1 by bolts. The bottom of the moving block 31 is provided with a slide groove 311 corresponding to slide rail 261. The height of the mounting plate 26 is adjusted by bolts to make slide rail 261 relatively horizontal, reducing the need for finishing of the table 1 and reducing manufacturing costs. An inclined surface 33 is provided above the moving block 31, and slide rail 331 is installed on the inclined surface 33. The bottom of the clamping seat 351 is provided with a slide rail 331 corresponding to slide rail 261. The slide rail 3513 corresponding to the second rail 331 restricts the movement of the clamping seat 351 via the slide rail 331 on the inclined plane 33, allowing the clamping seat 351 to run smoothly. A connector 3512 is provided at the bottom of the clamping seat 351. A mounting groove 333 is provided on one side of the moving block 31, and a connector 3311 is fixed inside the mounting groove 333. A spring 3312 is coupled between the connector 3512 and the connector 3311. The spring 3312 can pull the clamping seat 351 downwards, thereby pulling the connector 3512. 12 and the connector 3311 bring the clamping seat 351 and the moving block 31 closer together, so that the fixture can clamp the workpiece to be welded. A mounting block 332 is provided on one side of the moving block 31. A top block 3511 is provided on the same side of the clamping seat 351 above the moving block 31 corresponding to the mounting block 332. The mounting block 332 is provided with a mounting hole 3321. A cylinder 34 can be installed in the mounting hole 3321. The output end of the cylinder 34 can contact the top block 3511. The output end of the cylinder 34 lifts the clamping seat 351, so as to achieve the effect of releasing the fixture.

[0024] Please see Figures 2-5 In this embodiment, connector 2 3512 and connector 1 3311 are set screws with radial through holes. The two ends of spring 3312 are hooks, which can be inserted into the through holes of connector 2 3512 and connector 1 3311 respectively. Connector 2 3512 is rotatably engaged with clamping seat 351, and connector 1 3311 is rotatably engaged with moving block 31. The set screw drives one end hook of spring 3312 and screws it into the corresponding screw hole of connector 2 3512 or connector 1 3311, thereby fixing spring 3312 to connector 2 3512 and connector 1 3311.

[0025] During operation, when the workpiece to be welded arrives above the table 1, the device can drive the motor 23 to rotate according to the length of the workpiece. The motor 23 drives the coupling 25 and the lead screw 22 to rotate together. Thanks to the symmetrical threads on both sides of the lead screw 22, the clamping parts on both sides of the lead screw 22 can move closer or further apart. When preparing to descend, the cylinder 34 extends and lifts the clamping seat 351 along the length of the slide rail 2 331, so that the clamping plate 1 32 is completely exposed. When the workpiece to be welded descends to the top of the clamping plate 1 32, the cylinder 34 begins to retract, and at the same time, the spring 3312 pulls the clamping seat 351 to descend, so that the chuck 3521 contacts the top of the workpiece to be welded, achieving the effect of clamping the clamping plate 2 352 and the clamping plate 1 32.

[0026] Through the above steps, clamping plate 2 352 drives chuck 3521 to move, thereby pressing and releasing clamping plate 1 32. This enables clamping and positioning of thin workpieces to be welded. Clamping plate 2 352 can slide on inclined surface 33, facilitating the feeding of workpieces to be welded and preventing clamping plate 2 352 from obstructing the feed. Spring 3312 tightens clamping seat 351, reducing the cylinder 34 from being stuck in the middle stroke and extending the service life of cylinder 34. Two symmetrical threaded screws 22 enable the two clamping parts to move in opposite directions, adapting to the clamping of workpieces of different lengths. This solves the problem in the prior art where, when facing workpieces with low height, the first clamping component and the second clamping component will pass over the workpiece and fail to effectively clamp it.

Claims

1. A welding fixture for automotive parts, comprising a table (1), a support leg (11) at the bottom of the table (1), and a foot cup (12) at the bottom of the support leg (11), characterized in that: It also includes a slide rail (261) above the table (1) and a lead screw (22). The threads on both sides of the lead screw (22) are symmetrical. A clamping part is provided above the slide rail (261). The lead screw (22) passes through the clamping part and is engaged with the clamping part. The clamping part includes a clamping plate (32). A slope (33) is provided on the side of the clamping plate (32) away from the center of the table (1). A clamping seat (351) and a clamping plate (352) move on the slope (33). A chuck (3521) is provided at the bottom of the clamping plate (352). The chuck (3521) can contact the clamping plate (32). A spring (3312) is connected to the bottom of the clamping seat (351). The other end of the spring (3312) is connected to the moving block (31). A clamping part is provided on both sides of a lead screw (22). A lead screw (22) is provided on both sides of the table (1) along the length direction.

2. The automotive parts welding fixture according to claim 1, characterized in that: The lead screw (22) is fixed with a fixed seat (21) at both ends. One of the fixed seats (21) is provided with a motor seat (24) at the end away from the lead screw (22). A motor (23) is installed on the side of the motor seat (24) away from the fixed seat (21). The motor (23) includes an output end, which is connected to the lead screw (22) through a coupling (25). The clamping part includes a moving block (31), and the moving block (31) is provided with a threaded hole (312) corresponding to the lead screw (22).

3. The automotive parts welding fixture according to claim 2, characterized in that: The top of the tabletop (1) is provided with a mounting plate (26), and a slide rail (261) is located on the top of the mounting plate (26). The mounting plate (26) is connected to the tabletop (1) by bolts. The bottom of the moving block (31) is provided with a slide groove (311) corresponding to the slide rail (261).

4. The automotive parts welding fixture according to claim 3, characterized in that: The moving block (31) has an inclined surface (33) above it, and a slide rail (331) is installed on the inclined surface (33). The bottom of the clamping seat (351) has a slide groove (3513) corresponding to the slide rail (331).

5. The automotive parts welding fixture according to claim 4, characterized in that: The bottom of the clamping seat (351) is provided with a second connector (3512), and a mounting groove (333) is provided on one side of the moving block (31). A first connector (3311) is fixed in the mounting groove (333). A spring (3312) is coupled between the second connector (3512) and the first connector (3311). The spring (3312) can pull the clamping seat (351) downward.

6. The automotive parts welding fixture according to claim 5, characterized in that: A mounting block (332) is provided on one side of the movable block (31). A top block (3511) is provided on the same side of the mounting block (332) above the movable block (31). The mounting block (332) is provided with a mounting hole (3321). A cylinder (34) can be installed in the mounting hole (3321). The output end of the cylinder (34) can contact the top block (3511).

7. The automotive parts welding fixture according to claim 6, characterized in that: Connector 2 (3512) and connector 1 (3311) are set screws with radial through holes. The two ends of the spring (3312) are hooks, which can be inserted into the through holes of connector 2 (3512) and connector 1 (3311) respectively. Connector 2 (3512) is rotatably engaged with clamping seat (351), and connector 1 (3311) is rotatably engaged with moving block (31).

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