A positioning fixture for automobile glass guide rail welding processing

Abstract

The utility model discloses a positioning fixture for automobile glass guide rail welding processing, including workstation and first positioning mechanism, be equipped with first positioning fixture, second positioning fixture, first pneumatic mechanism and second pneumatic mechanism on the workstation, have the first pressing plate rotationally connected on first pneumatic mechanism, and first pneumatic mechanism drives first pressing plate to be close to first positioning fixture, have the second pressing plate rotationally connected on second pneumatic mechanism, and second pneumatic mechanism drives second pressing plate to be close to second positioning fixture, and first positioning mechanism includes two sliding seats and two first drive assemblies, and sliding seat is slidably connected with workstation, and be equipped with the locating plate on sliding seat, and one side of locating plate is equipped with the contact surface, and two first drive assemblies drive the contact surface of two sliding seats close to first positioning fixture respectively. The utility model provides a positioning fixture for automobile glass guide rail welding processing, solves the problem of low production efficiency and unstable quality of traditional positioning pin and limiting plate mode.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts processing, and in particular to a positioning fixture for welding automotive glass guide rails. Background Technology

[0002] In the automotive window lift system manufacturing industry, the glass guide rail is a key component that guides the lifting and lowering of the glass and bears the weight of the glass. Its welding precision directly determines the smoothness of the glass lifting and lowering, the sealing performance after closing, and the surface flatness of the guide rail weld.

[0003] Current production processes typically utilize the U-shaped cross-section of the glass guide rail to insert a fixture, then use multiple sets of positioning pins to fix a limiting plate to the worktable, using the limiting plate to clamp and position the glass guide rail, and finally perform welding. However, after long-term repeated use, mechanical wear will cause a clearance between the positioning pin and the pin hole, resulting in a gradual increase in the cumulative tolerance. This causes the actual positioning position of the glass guide rail to deviate from the theoretical position. At the same time, this clamping method, which relies on multiple sets of pins, requires manual disassembly and installation of each pin. The complex disassembly process is difficult to complete efficiently with automated equipment. As a result, the clamping system cannot meet the process requirements of modern production lines for the rapid clamping of batch workpieces, ultimately restricting the production efficiency and quality stability of the glass guide rail welding process. Utility Model Content

[0004] The purpose of this utility model is to provide a positioning fixture for welding automotive glass guide rails, which solves the problems of low production efficiency and unstable quality of traditional positioning pins and limiting plates.

[0005] The technical solution adopted by the positioning fixture for welding automotive glass guide rails disclosed in this utility model is as follows: The device includes a worktable and a first positioning mechanism. The worktable is provided with a first positioning fixture, a second positioning fixture, a first pneumatic mechanism, and a second pneumatic mechanism. A first pressure plate is rotatably connected to the first pneumatic mechanism, and the first pneumatic mechanism drives the first pressure plate to approach the first positioning fixture. A second pressure plate is rotatably connected to the second pneumatic mechanism, and the second pneumatic mechanism drives the second pressure plate to approach the second positioning fixture. The first positioning mechanism includes two slides and two first driving components. The slides are slidably connected to the worktable. A positioning plate is provided on the slide. One side of the positioning plate is provided with a contact surface. The two contact surfaces are parallel to each other. The two first driving components respectively drive the contact surfaces of the two slides to approach the first positioning fixture.

[0006] As a preferred embodiment, the worktable is provided with a second positioning mechanism, the second positioning mechanism includes a second driving component, a connecting rod is rotatably connected to the second driving component, a positioning block is fixedly connected to the connecting rod, and the second driving component drives the positioning block of the connecting rod to approach the second positioning fixture.

[0007] As a preferred embodiment, the second positioning mechanism further includes a third driving component, which is provided with a self-locking plate, and the third driving component drives the self-locking plate to contact the positioning block.

[0008] As a preferred embodiment, a slide rail is fixedly connected to the workbench, and the slide block is slidably connected to the slide rail.

[0009] As a preferred embodiment, a first support plate is fixedly connected to the slide block, with one end of the first support plate touching the other side of the positioning plate and the other end of the first support plate being close to the contact surface.

[0010] As a preferred embodiment, one of the positioning plates has a groove on one side, and a contact block is fixedly connected in the groove; the other positioning plate has an adjustable height limiting block, and the contact block is close to the limiting block.

[0011] The beneficial effects of the positioning fixture for welding automotive glass guide rails disclosed in this utility model are: The two ends of the glass guide rail are placed in the first positioning fixture and the second positioning fixture, respectively. Both the first and second positioning fixtures are engaged in the U-shaped groove of the glass guide rail. Through the two sliding blocks and their parallel contact surfaces in the first positioning mechanism, they simultaneously contact both sides of the glass guide rail during the clamping process, effectively ensuring the parallel positioning accuracy of the glass guide rail. In conjunction with the first and second pneumatic mechanisms, the first and second pressure plates are driven to press the two ends of the glass guide rail, respectively, realizing the automated operation of the clamping process, significantly improving clamping efficiency, and meeting the process requirements of modern production lines for rapid clamping of batch workpieces. At the same time, it avoids the problem of increased cumulative tolerance caused by the fit clearance of traditional positioning pins due to long-term use, thereby improving the positional accuracy of the glass guide rail and the flatness of the weld surface during the welding process. Ultimately, it ensures the smooth operation and sealing performance of the glass lifting system, and improves the stability of welding quality and production efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a positioning fixture for welding automotive glass guide rails according to this utility model.

[0013] Figure 2 This is a top view of a positioning fixture for welding automotive glass guide rails according to this utility model.

[0014] Figure 3This is a schematic diagram of the first pneumatic mechanism of a positioning fixture for welding automotive glass guide rails according to this utility model.

[0015] Figure 4 This is a schematic diagram of the first positioning mechanism of a positioning fixture for welding automotive glass guide rails according to this utility model.

[0016] Figure 5 This is a schematic diagram of the first positioning mechanism of a positioning fixture for welding automotive glass guide rails according to this utility model.

[0017] Figure 6 This is a schematic diagram of the first positioning mechanism of a positioning fixture for welding automotive glass guide rails according to this utility model.

[0018] Figure 7 This is a schematic diagram of the second positioning mechanism and the second pneumatic mechanism of a positioning fixture for welding automotive glass guide rails according to this utility model. Detailed Implementation

[0019] The present invention will be further described and illustrated below with reference to specific embodiments and the accompanying drawings: Please refer to Figures 1-3 and Figure 7 .

[0020] The present invention discloses a positioning fixture for welding automotive glass guide rails, comprising a worktable 1 and a first positioning mechanism 4; The workbench 1 is provided with a first positioning fixture 11 and a second positioning fixture 12. Both the first positioning fixture 11 and the second positioning fixture 12 are fixedly connected to the table surface of the workbench 1. The contact surfaces 421 of the glass guide rail 6 with the first positioning fixture 11 and the second positioning fixture 12 are both processed by contouring, so that the first positioning fixture 11 and the second positioning fixture 12 can be inserted into the U-shaped groove of the glass guide rail 6 to achieve the effect of preliminary positioning. Furthermore, positioning posts 111 extend from both the first positioning fixture 11 and the second positioning fixture 12. Mounting holes for mounting on vehicles are provided at both ends of the glass guide rail 6. When the two ends of the glass guide rail 6 are placed on the first positioning fixture 11 and the second positioning fixture 12 respectively, the two positioning posts 111 pass through the two mounting holes respectively, constraining the position of the glass guide rail 6 on the first positioning fixture 11 and the second positioning fixture 12, thus achieving the effect of secondary preliminary positioning.

[0021] The workbench 1 is equipped with a first pneumatic mechanism 2 and a second pneumatic mechanism 3, which are respectively close to the first positioning fixture 11 and the second positioning fixture 12. Furthermore, the first pneumatic mechanism 2 includes a first clamping cylinder 21; the first clamping cylinder 21 is fixedly connected to the table surface of the worktable 1, and a first connecting rod is rotatably connected to the outer shell of the first clamping cylinder 21; a first pressure plate 211 is rotatably connected to the first pneumatic mechanism 2, one end of the first pressure plate 211 is rotatably connected to the first connecting rod, the output shaft of the first clamping cylinder 21 is rotatably connected to the middle part of the first pressure plate 211, and the other end of the first pressure plate 211 extends to the top of the first positioning fixture 11; The first clamping cylinder 21 pulls the first pressure plate 211 by its output shaft, so that the other end of the first pressure plate 211 moves away from the top of the first positioning fixture 11; the first clamping cylinder 21 pushes the first pressure plate 211 by its output shaft, so that the other end of the first pressure plate 211 presses the glass guide rail 6 on the first positioning fixture 11. Furthermore, the second pneumatic mechanism 3 includes a second clamping cylinder 31; the second clamping cylinder 31 is fixedly connected to the table surface of the worktable 1, and a second connecting rod is rotatably connected to the outer shell of the second clamping cylinder 31; a second pressure plate 311 is rotatably connected to the second pneumatic mechanism 3, the output shaft of the second clamping cylinder 31 is rotatably connected to one end of the second pressure plate 311, the middle part of the second pressure plate 311 is rotatably connected to the second connecting rod, and the other end of the second pressure plate 311 extends to the top of the second positioning fixture 12; The output shaft of the second clamping cylinder 31 pulls the second pressure plate 311, causing the other end of the second pressure plate 311 to move away from the top of the second positioning fixture 12; the output shaft of the second clamping cylinder 31 pushes the second pressure plate 311, causing the other end of the second pressure plate 311 to press the glass guide rail 6 on the second positioning fixture 12; through the coordinated operation of the first pneumatic mechanism 2 and the second pneumatic mechanism 3, the height positioning of the glass guide rail 6 on the worktable 1 is achieved, while preventing the glass guide rail 6 from warping at both ends during welding.

[0022] Please refer to Figure 1 , Figure 2 and Figures 4-7 .

[0023] A slide rail 13 is fixedly connected to the workbench 1. The slide rail 13 is located between the first positioning fixture 11 and the second positioning fixture 12. The first positioning mechanism 4 includes two slide blocks 41 and two first drive components 43. Furthermore, the slide block 41 is slidably connected to the slide rail 13 of the worktable 1, and the first positioning fixture 11 is located between the two slide blocks 41; the slide block 41 is provided with a positioning plate 42, which is located between the two slide blocks 41, and the two positioning plates 42 are opposite to each other. Furthermore, one side of the positioning plate 42 is provided with a contact surface 421, and the contact surface 421 is recessed to a certain depth on the positioning plate 42 in the direction of the slide block 41; when the two slide blocks 41 slide on the slide rail 13 and approach each other, so that the two positioning plates 42 contact each other, there is a certain space between the two contact surfaces 421, which is equal to the width of the glass guide rail 6. Furthermore, the two contact surfaces 421 are parallel to each other. When the two contact surfaces 421 touch the two sides of the glass guide rail 6, the parallelism accuracy of the glass guide rail 6 can be determined.

[0024] A first support plate 411 is fixedly connected to the slide 41. One end of the first support plate 411 touches the other side of the positioning plate 42, and one end of the first support plate 411 is close to the contact surface 421. The first support plate 411 is used to enhance the strength of the positioning plate 42 in the area of ​​the contact surface 421, reduce the amplitude of its elastic deformation, and improve the parallel accuracy of the two contact surfaces 421 constraining the glass guide rail 6. A second support plate 412 is fixedly connected to the slide 41. One end of the second support plate 412 touches the other side of the positioning plate 42. The second support plate 412 is used to increase the strength of the contact area between the two positioning plates 42 and reduce the amplitude of their elastic deformation.

[0025] One of the positioning plates 42 has a groove 422 on one side, which is recessed to a certain depth on one of the positioning plates 42 towards the slide block 41. A contact block 423 is fixedly connected inside the groove 422. The other positioning plate 42 has an adjustable height limit block 424, and an adjusting bolt 425 is connected to the other positioning plate 42. The adjusting bolt 425 is connected to the limit block 424. The height of the limit block 424 can be adjusted by rotating the adjusting bolt 425. When the two positioning plates 42 are close to each other, the contact block 423 touches the limit block 424. The height of the limit block 424 can adjust the distance between the two positioning plates 42.

[0026] Two first drive components 43 respectively drive the contact surfaces 421 of the two slides 41 to approach the first positioning fixture 11. The first drive component 43 includes a first drive cylinder 431. Furthermore, one of the first drive cylinders 431 is fixedly connected to the table surface of the worktable 1, the output shaft of one of the first drive cylinders 431 is parallel to the slide rail 13, and the output shaft of one of the first drive cylinders 431 is fixedly connected to one of the slide blocks 41. The output shaft of one of the first drive cylinders 431 pushes or pulls one of the slide blocks 41 to slide back and forth on the slide rail 13, so that one of the slide blocks 41 slides closer to or slides away from the first positioning fixture 11. Furthermore, another first drive cylinder 431 is rotatably connected to the table surface of the worktable 1. A scissor arm assembly 44 is provided on the outside of the other first drive cylinder 431. The scissor arm assembly 44 includes two rocker arms 441 that are rotatably connected to each other. The output shaft of the other first drive cylinder 431 is rotatably connected to the rotatable connection between the two rocker arms 441. One rocker arm 441 is rotatably connected to the table surface of the worktable 1, and the other rocker arm 441 is rotatably connected to another slide block 41. The output shaft of another first drive cylinder 431 pulls the two rocker arms 441 to fold, so that the scissor arm assembly 44 pulls the other slide block 41 to slide away from the first positioning fixture 11; the output shaft of another first drive cylinder 431 pushes the two rocker arms 441 to unfold, so that the scissor arm assembly 44 pushes the other slide block 41 to slide closer to the first positioning fixture 11.

[0027] The workbench 1 is provided with a second positioning mechanism 5, which includes a second drive assembly 51 and a second drive cylinder 511. Furthermore, the second drive cylinder 511 is fixedly connected to the table surface of the worktable 1, and a third connecting rod is rotatably connected to the outer shell of the second drive cylinder 511; a connecting rod 512 is rotatably connected to the second drive assembly 51, one end of the connecting rod 512 is rotatably connected to the third connecting rod, the output shaft of the second drive cylinder 511 is rotatably connected to the middle part of the connecting rod 512, and a positioning block 513 is fixedly connected to the other end of the connecting rod 512, the positioning block 513 being located above the second positioning fixture 12; The output shaft of the second drive cylinder 511 pulls the connecting rod 512, causing the connecting rod 512 to pull the positioning block 513 away from the top of the second positioning fixture 12; the output shaft of the second drive cylinder 511 pushes the connecting rod 512, causing the connecting rod 512 to push the positioning block 513 to press the glass guide rail 6 on the second positioning fixture 12, thereby achieving the height positioning of the middle part of the glass guide rail 6 on the worktable 1, and at the same time preventing the glass guide rail 6 from shifting in the middle during welding.

[0028] The second positioning mechanism 5 also includes a third drive assembly 52, which includes a third drive cylinder 521. The third drive cylinder 521 is fixedly connected to the table surface of the worktable 1. The third drive assembly 52 is provided with a self-locking plate 522, which is fixedly connected to the output shaft of the third drive cylinder 521. When the positioning block 513 presses against the glass guide rail 6 on the second positioning fixture 12, the output shaft of the third drive cylinder 521 drives the self-locking plate 522 to contact the positioning block 513, constraining the movement of the positioning block 513 and achieving a locking effect; after welding is completed, the output shaft of the third drive cylinder 521 pulls the self-locking plate 522 away from the positioning block 513, unlocking the limit on the positioning block 513.

[0029] Please refer to Figures 1-7 .

[0030] During work: Place both ends of the glass guide rail 6 on the first positioning fixture 11 and the second positioning fixture 12 respectively, so that the first positioning fixture 11 and the second positioning fixture 12 are both inserted into the U-shaped groove of the glass guide rail 6, and the two mounting holes of the glass guide rail 6 pass through the positioning posts 111 of the first positioning fixture 11 and the second positioning fixture 12 respectively to complete the initial positioning. Two first drive cylinders 431 drive two slide blocks 41 to move towards each other, so that the contact surfaces 421 of the two positioning plates 42 respectively abut against the two sides of the glass guide rail 6, so as to correct and maintain the parallel accuracy of the glass guide rail 6. The output shaft of the first clamping cylinder 21 drives the first pressure plate 211, so that its other end presses against the glass guide rail 6 on the first positioning fixture 11; the output shaft of the second clamping cylinder 31 drives the second pressure plate 311, so that its other end presses against the glass guide rail 6 on the second positioning fixture 12, thereby positioning the height of the glass guide rail 6 on the worktable 1 and preventing the two ends of the glass guide rail 6 from warping during the welding process. The output shaft of the second drive cylinder 511 pushes the connecting rod 512, causing the connecting rod 512 to drive the positioning block 513 to press the glass guide rail 6 on the second positioning fixture 12, thereby positioning the height of the middle part of the glass guide rail 6 on the worktable 1 and preventing the middle part from shifting during welding; at the same time, the output shaft of the third drive cylinder 521 drives the self-locking plate 522 to press the positioning block 513, thereby constraining and locking the movement of the positioning block 513. After the cylinders operate in sequence to automatically position and clamp the glass guide rail 6, the welding operation is performed.

[0031] After welding is completed, the output shaft of the third drive cylinder 521 drives the self-locking plate 522 to disengage from the positioning block 513, releasing its constraint; the output shaft of the second drive cylinder 511 pulls the connecting rod 512, causing the positioning block 513 to be lifted away from the second positioning fixture 12, releasing the constraint on the middle part of the glass guide rail 6. The first clamping cylinder 21 and the second clamping cylinder 31 respectively drive the first pressure plate 211 and the second pressure plate 311 to loosen, releasing the pressure on both ends of the glass guide rail 6; the two first driving cylinders 431 respectively drive the two slide blocks 41 to move in opposite directions, so that the two positioning plates 42 are separated from both sides of the glass guide rail 6. After the cylinders are activated sequentially to release all constraints on the glass guide rail 6, the external robotic arm can easily pick up the welded product.

[0032] This invention provides a positioning fixture for welding automotive glass guide rails. The two ends of the glass guide rail are placed in a first positioning fixture and a second positioning fixture, respectively. Both fixtures are engaged within the U-shaped groove of the glass guide rail. Through two sliding blocks and their parallel contact surfaces in the first positioning mechanism, the two blocks simultaneously contact both sides of the glass guide rail during clamping, effectively ensuring the parallel positioning accuracy of the glass guide rail. Furthermore, a first pneumatic mechanism and a second pneumatic mechanism drive a first pressure plate and a second pressure plate to press the two ends of the glass guide rail, respectively, thus automating the clamping process and significantly improving clamping efficiency. This meets the process requirements of modern production lines for rapid clamping of batch workpieces. Simultaneously, it avoids the problem of increased cumulative tolerances caused by the long-term use of traditional positioning pins due to fit clearances. This improves the positional accuracy of the glass guide rail and the flatness of the weld surface during welding, ultimately ensuring the smooth operation and sealing performance of the glass lifting system, and enhancing the stability of welding quality and production efficiency.

[0033] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the essence and scope of the technical solutions of this utility model.

Claims

1. A positioning fixture for welding automotive glass guide rails, characterized in that, Includes the worktable and the first positioning mechanism; The workbench is provided with a first positioning fixture, a second positioning fixture, a first pneumatic mechanism, and a second pneumatic mechanism. A first pressure plate is rotatably connected to the first pneumatic mechanism, and the first pneumatic mechanism drives the first pressure plate to approach the first positioning fixture. A second pressure plate is rotatably connected to the second pneumatic mechanism, and the second pneumatic mechanism drives the second pressure plate to approach the second positioning fixture. The first positioning mechanism includes two slides and two first drive components. The slides are slidably connected to the worktable. The slides are provided with positioning plates. One side of the positioning plate is provided with a contact surface. The two contact surfaces are parallel to each other. The two first drive components respectively drive the contact surfaces of the two slides to approach the first positioning fixture.

2. The positioning fixture for welding automotive glass guide rails as described in claim 1, characterized in that, The workbench is provided with a second positioning mechanism, which includes a second driving component. A connecting rod is rotatably connected to the second driving component, and a positioning block is fixedly connected to the connecting rod. The second driving component drives the positioning block of the connecting rod to approach the second positioning fixture.

3. A positioning fixture for welding automotive glass guide rails as described in claim 2, characterized in that, The second positioning mechanism further includes a third driving component, which has a self-locking plate and drives the self-locking plate to contact the positioning block.

4. A positioning fixture for welding automotive glass guide rails as described in any one of claims 1-3, characterized in that, A slide rail is fixedly connected to the workbench, and the slide block is slidably connected to the slide rail.

5. A positioning fixture for welding automotive glass guide rails as described in claim 4, characterized in that, A first support plate is fixedly connected to the slide block. One end of the first support plate touches the other side of the positioning plate, and one end of the first support plate is close to the contact surface.

6. A positioning fixture for welding automotive glass guide rails as described in claim 5, characterized in that, One of the positioning plates has a groove on one side, and a contact block is fixedly connected in the groove. The other positioning plate has an adjustable height limit block, and the contact block is close to the limit block.

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