Automobile body welding fixture

Abstract

The utility model discloses a kind of automobile body welding fixture, it is related to the technical field of fixture, including bottom plate, positioning assembly, compression assembly one and compression assembly two, several support seats are equipped on the bottom plate, the top of the support seat is equipped with the profiling block matched with automobile body;Positioning assembly is located on the bottom plate, compression assembly one is located on one side of bottom plate, and compression assembly two is located on the other side of bottom plate.The double-positioning mechanism of vertical positioning and inclined positioning is set in the application, the lateral deviation problem caused by traditional single positioning is solved, the precise alignment of welding interface is provided, the subsequent correction process is reduced, and the compression assembly one and the compression assembly two form the counter-pressure structure of full-area coverage, the body warping amount is reduced in welding process, and the overall rigidity of body is significantly improved.

Description

Technical Field

[0001] This utility model relates to the technical field of fixtures, specifically to an automotive body welding fixture. Background Technology

[0002] As the core load-bearing structure of the vehicle, the manufacturing process of the car body requires the precise welding of multiple stamped parts. Welding fixtures are key equipment to ensure the welding accuracy of the car body. They need to determine the relative position of each part through a positioning structure and then fix the parts through a clamping structure to avoid positional displacement caused by vibration and thermal deformation during the welding process, which directly affects the dimensional accuracy of the car body, the compatibility of subsequent assembly, and the driving safety of the entire vehicle. However, existing automotive body welding fixtures still have the following technical defects: First, most traditional fixtures can only achieve vertical positioning of the vehicle body, lacking a targeted positioning structure for the tilting direction of the vehicle body. Since the sides of automotive bodies often have curved or tilted welding interfaces, vertical positioning alone can easily lead to lateral displacement of the vehicle body, causing welding interface alignment errors to exceed tolerances, requiring subsequent manual correction, increasing production costs and time. Second, the clamping components of traditional fixtures are mostly concentrated on one side or key local parts of the vehicle body, insufficiently covering non-critical areas such as the front, middle, and rear sides of the vehicle body that affect overall rigidity. Furthermore, some clamping structures only apply pressure through a single clamping arm, which can easily cause local warping and displacement of the vehicle body during welding, reducing the overall rigidity of the vehicle body. Summary of the Invention

[0003] The purpose of this utility model is to provide an automotive body welding fixture to overcome the above-mentioned defects in the prior art.

[0004] A car body welding fixture includes a base plate, a positioning component, a clamping component one and a clamping component two. The base plate is provided with a plurality of support seats, and the top of the support seats is provided with a contour block that mates with the car body. The positioning component is mounted on the base plate and is used to position the car body; The clamping assembly is located on one side of the base plate and is used to clamp one side of the car body. The second clamping component is located on the other side of the base plate and is used to clamp the other side of the car body.

[0005] Preferably, the positioning assembly includes a positioning cylinder one and a positioning cylinder two. The positioning cylinder one is vertically mounted on the base plate and has a movable plate one at the end of its piston rod. The movable plate one is provided with a positioning pin one. The positioning cylinder two is mounted on the support seat of the base plate and has a movable plate two at the end of its piston rod. The movable plate two is provided with a plurality of positioning pins two.

[0006] Preferably, the clamping assembly includes a clamping cylinder and a swing arm. The clamping cylinder is provided with a plurality of cylinders and is respectively fixed to one side of a fixed seat on the base plate. Each clamping cylinder is connected to a swing arm on its output shaft. A pressure arm is connected to the swing arm via a connecting arm. The other side of the fixed seat is provided with a support frame that cooperates with the car body.

[0007] Preferably, the clamping assembly two includes clamping cylinder two, clamping cylinder three, clamping cylinder four, clamping cylinder five, and clamping cylinder six. Clamping cylinder two and clamping cylinder three are respectively located on one side of the fixed seat two and fixed seat three on the front side of the base plate. A swing arm two and a swing arm three are respectively connected to the output shaft of clamping cylinder two and clamping cylinder three. The swing arm two is connected to a pressure arm two through a connecting arm two. A support frame two that cooperates with the car body is provided on the other side of the fixed seat two. The swing arm three is connected to a pressure arm three through a connecting arm three. The clamping cylinder four is located on one side of the fixed seat four in the middle of the base plate. A swing arm four is connected to the output shaft of clamping cylinder four, and a pressure arm four is connected to the swing arm four via a connecting arm four. A support frame four that mates with the car body is provided on the other side of the fixed seat four. Clamping cylinder five is located on one side of the fixed seat five on the right side of the base plate. A swing arm five is connected to the output shaft of clamping cylinder five, and a pressure arm five is connected to the swing arm five via a connecting arm five. Clamping cylinder six is ​​located on one side of the fixed seat six on the rear side of the base plate. A swing arm six is ​​connected to the output shaft of clamping cylinder six, and a pressure arm six is ​​connected to the swing arm six via a connecting arm six. A support frame six mounted on the base plate is provided below the pressure arm six.

[0008] Preferably, the side of the fixed seat five is provided with a pressing cylinder, the piston rod end of the pressing cylinder is provided with a movable plate three, and the movable plate three is provided with a pressing arm seven for pressing the side of the car body.

[0009] Preferably, the second positioning cylinder is located on the outside of the fourth clamping cylinder.

[0010] Preferably, the second positioning cylinder is inclined on the support base.

[0011] The beneficial effects achieved by this utility model are as follows: 1. This application sets up a dual positioning mechanism that combines vertical positioning and tilt positioning. Positioning cylinder one drives positioning pin one to be vertically inserted into the positioning hole at the bottom of the vehicle body to achieve vertical reference positioning; positioning cylinder two drives positioning pin two to be tilted into the positioning hole on the side of the vehicle body to form lateral constraint, which solves the problem of lateral offset caused by traditional single positioning, provides a guarantee for accurate alignment of welding interfaces, and reduces subsequent correction processes. 2. This application forms a full-area covering pressure structure through clamping component one and clamping component two. Clamping component one achieves stable clamping on one side of the vehicle body through the power transmission path of clamping cylinder, swing arm, connecting arm one and pressure arm one, in conjunction with support frame one. Clamping component two drives pressure arms two to six through six clamping cylinders respectively to form counter-pressure on the front, middle and rear sides of the vehicle body. At the same time, a clamping cylinder is added to drive pressure arm seven to assist in clamping specific parts on the right side of the vehicle body, ensuring that all key areas of the vehicle body are subjected to uniform clamping force, thereby reducing the amount of body warping during welding and significantly improving the overall rigidity of the vehicle body. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the front structure of this utility model.

[0014] Figure 3 This is a schematic diagram of the rear structure of this utility model.

[0015] Figure 4 This is a schematic diagram of the structure of this utility model when placed on a car body.

[0016] In the diagram, 1. Base plate; 2. Support base; 21. Contouring block; 3. Positioning assembly; 31. Positioning cylinder one; 32. Moving plate one; 33. Positioning pin one; 34. Positioning cylinder two; 35. Moving plate two; 36. Positioning pin two; 4. Clamping assembly one; 41. Clamping cylinder one; 42. Fixed base one; 43. Swing arm one; 44. Connecting arm one; 45. Pressure arm one; 46. Support frame one; 5. Clamping assembly two; 51. Clamping cylinder two; 511. Fixed base two; 512. Swing arm two; 513. Connecting arm two; 514. Pressure arm two; 515. Support frame two; 53. Clamping cylinder three; 53 1. Fixed base three; 532. Swing arm three; 533. Connecting arm three; 534. Pressure arm three; 54. Clamping cylinder four; 541. Fixed base four; 542. Swing arm four; 543. Connecting arm four; 544. Pressure arm four; 545. Support frame four; 55. Clamping cylinder five; 551. Fixed base five; 552. Swing arm five; 553. Connecting arm five; 554. Pressure arm five; 56. Clamping cylinder six; 561. Fixed base six; 562. Swing arm six; 563. Connecting arm six; 564. Pressure arm six; 565. Support frame six; 57. Clamping cylinder; 571. Moving plate three; 572. Pressure arm seven. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0018] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims and drawings of this application are intended to cover non-exclusive inclusion.

[0019] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of the phrase "embodiment" in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0020] like Figure 1-4 As shown, this utility model provides an automotive body welding fixture, including a base plate 1, a positioning component 3, a clamping component 1 4 and a clamping component 2 5. The base plate 1 is provided with a plurality of support seats 2, and the top of the support seats 2 is provided with a contour block 21 that mates with the automotive body. In addition, the positioning component 3 is mounted on the base plate 1 and is used to position the car body. The positioning component 3 includes a positioning cylinder 31 and a positioning cylinder 34. The positioning cylinder 31 is vertically mounted on the base plate 1 and its piston rod end is provided with a moving plate 32. The moving plate 32 is provided with a positioning pin 33, which can accurately position the positioning hole or positioning surface in the vertical direction of the car body and adapt to the positioning requirements in the vertical direction of the car body. In addition, the second positioning cylinder 34 is located outside the fourth clamping cylinder 54. The second positioning cylinder 34 is inclined on the support seat 2 of the base plate 1 and its piston rod end is provided with a moving plate 35. The moving plate 35 is provided with a number of positioning pins 36, which can perform multi-point positioning of the vehicle body, further improve the accuracy and reliability of the overall positioning of the vehicle body, and avoid the deviation risk of single-point positioning. In addition, the clamping assembly 4 is located on one side of the base plate 1 and is used to clamp one side of the car body. The clamping assembly 4 includes a clamping cylinder 41 and a swing arm 43. The clamping cylinder 41 is provided with several and is fixed to one side of the fixing seat 42 on the base plate 1. The output shaft of each clamping cylinder 41 is connected to the swing arm 43. The swing arm 43 is connected to the pressure arm 45 through the connecting arm 44. The other side of the fixing seat 42 is provided with a support frame 46 that cooperates with the car body.

[0021] The second clamping assembly 5 is located on the other side of the base plate 1 and is used to clamp the other side of the car body. The second clamping assembly 5 includes a second clamping cylinder 51, a third clamping cylinder 53, a fourth clamping cylinder 54, a fifth clamping cylinder 55, and a sixth clamping cylinder 56. The second clamping cylinder 51 and the third clamping cylinder 53 are respectively located on one side of the fixed seat 2 511 and the fixed seat 3 531 on the front side of the base plate 1. The output shafts of the second clamping cylinder 51 and the third clamping cylinder 53 are respectively connected to the swing arm 2 512 and the swing arm 3 532. The swing arm 2 512 is connected to the pressure arm 2 514 through the connecting arm 2 513. The other side of the fixed seat 2 511 is provided with a support frame 2 515 that cooperates with the car body. The swing arm 3 532 is connected to the pressure arm 3 534 through the connecting arm 3 533. The clamping cylinder 4 54 is located on one side of the fixed seat 4 541 in the middle of the base plate 1. The output shaft of the clamping cylinder 4 54 is connected to the swing arm 4 542. The swing arm 4 542 is connected to the pressure arm 4 544 through the connecting arm 4 543. The other side of the fixed seat 4 541 is provided with a support frame 4 545 that cooperates with the car body. The clamping cylinder 55 is located on one side of the fixed seat 551 on the right side of the base plate 1. The output shaft of the clamping cylinder 55 is connected to the swing arm 552, and the swing arm 552 is connected to the pressure arm 554 through the connecting arm 553. The clamping cylinder 6 56 is located on one side of the fixed seat 6 561 on the rear side of the base plate 1. The output shaft of the clamping cylinder 6 56 is connected to the swing arm 6 562. The swing arm 6 562 is connected to the pressure arm 6 564 through the connecting arm 6 563. The pressure arm 6 564 is provided with a support frame 6 565 mounted on the base plate 1 below it. The pressure arm 2 514 is driven to the pressure arm 6 564 by the six clamping cylinders respectively, forming counter-pressure on the front, middle and rear sides of the vehicle body. In addition, the side of the fixed seat 551 is provided with a pressing cylinder 57, and the piston rod end of the pressing cylinder 57 is provided with a moving plate 3 571. The moving plate 3 571 is provided with a pressing arm 7 572 for pressing the side of the car body. The added pressing cylinder 57 drives the pressing arm 7 572 to assist in pressing a specific part on the right side of the car body, ensuring that all key areas of the car body are subjected to uniform pressing force. Detailed implementation methods and principles: Vertical positioning: Place the car body to be welded on the contour block 21 on the support seat 2, control the piston rod of the positioning cylinder 31 to extend in the vertical direction, drive the end-connected moving plate 32 and positioning pin 33 to move upward, and accurately insert them into the preset vertical positioning hole at the bottom of the car body to achieve the vertical positioning of the car body. Tilt-direction positioning: The piston rod of the control positioning cylinder 2 34 extends in the tilt direction, driving the end-connected moving plate 2 35 and positioning pin 2 36 to move synchronously and accurately insert into the tilt positioning hole on the side of the car body to achieve the position locking of the car body. After positioning, the clamping components 4 and 5 on both sides of the base plate 1 apply pressure from both sides of the vehicle body and key parts, respectively, to firmly fix the vehicle body to the contour block 21 of the support seat 2, thus preventing the vehicle body from shifting during welding. The output shaft of the clamping cylinder 41 moves in a preset direction, which drives the swing arm 43 connected to the end to rotate. The swing arm 43 transmits power to the pressure arm 45 through the connecting arm 44, so that the pressure arm 45 presses the car body on the support frame 46 and the contour block 21. At the same time, the output shaft of the control clamping cylinder 2 51 drives the swing arm 2 512 to rotate. The swing arm 2 512 drives the pressure arm 2 514 to press against the corresponding part of the front side of the vehicle body through the connecting arm 2 513. It works with the support frame 2 515 on the other side of the fixed seat 2 511 to form a counter-pressure and press the front side of the vehicle body. At the same time, the output shaft of the clamping cylinder 3 53 drives the swing arm 3 532 to rotate. The swing arm 3 532 drives the pressure arm 3 534 to press against another part of the front side of the vehicle body through the connecting arm 3 533, assisting in the full clamping of the front side. At the same time, the output shaft of the control clamping cylinder 4 54 drives the swing arm 4 542 to rotate. The swing arm 4 542 drives the pressure arm 4 544 to press against the middle of the vehicle body through the connecting arm 4 543. It works with the support frame 4 545 on the other side of the fixed seat 4 541 to form a counter-pressure and lock the middle position of the vehicle body. At the same time, the output shaft of the clamping cylinder 555 drives the swing arm 552 to rotate. The swing arm 552 drives the pressure arm 554 to press against the right side of the vehicle body through the connecting arm 553, initially clamping the right side of the vehicle body. The piston rod of the clamping cylinder 57 extends and drives the moving plate 3 571 to move. The pressure arm 7 572 on the moving plate 3 571 presses against a specific part of the side of the vehicle body with the moving plate 3 571, realizing the clamping of the right side. At the same time, the output shaft of the clamping cylinder 656 drives the swing arm 6562 to rotate, and the swing arm 6562 drives the pressure arm 6564 to press against the rear side of the vehicle body. Together with the support frame 6565 on the bottom plate 1 below the pressure arm 6564, they form a counter-pressure and press against the rear side of the vehicle body.

[0022] The embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A welding fixture for automobile bodies, characterized in that: It includes a base plate (1), a positioning component (3), a first pressing component (4) and a second pressing component (5). The base plate (1) is provided with several support seats (2), and the top of the support seats (2) is provided with a contour block (21) that cooperates with the car body. The positioning component (3) is mounted on the base plate (1) and is used to position the car body; The clamping assembly 1 (4) is located on one side of the base plate (1) and is used to clamp one side of the car body; The second clamping component (5) is located on the other side of the base plate (1) and is used to clamp the other side of the car body.

2. The automotive body welding fixture according to claim 1, characterized in that: The positioning component (3) includes a positioning cylinder one (31) and a positioning cylinder two (34). The positioning cylinder one (31) is vertically mounted on the base plate (1) and its piston rod end is provided with a moving plate one (32). The moving plate one (32) is provided with a positioning pin one (33). The positioning cylinder two (34) is mounted on the support seat (2) of the base plate (1) and its piston rod end is provided with a moving plate two (35). The moving plate two (35) is provided with a plurality of positioning pin two (36).

3. The automotive body welding fixture according to claim 1, characterized in that: The clamping assembly (4) includes a clamping cylinder (41) and a swing arm (43). The clamping cylinder (41) is provided with several fixed seats (42) on one side of the base plate (1). Each clamping cylinder (41) has a swing arm (43) connected to its output shaft. The swing arm (43) is connected to a pressure arm (45) via a connecting arm (44). The other side of the fixed seat (42) is provided with a support frame (46) that cooperates with the car body.

4. The automotive body welding fixture according to claim 2, characterized in that: The clamping assembly 2 (5) includes clamping cylinder 2 (51), clamping cylinder 3 (53), clamping cylinder 4 (54), clamping cylinder 5 (55), and clamping cylinder 6 (56). Clamping cylinder 2 (51) and clamping cylinder 3 (53) are respectively located on one side of fixed seat 2 (511) and fixed seat 3 (531) on the front side of the base plate (1). A swing arm 2 is connected to the output shaft of clamping cylinder 2 (51) and clamping cylinder 3 (53). (512) and swing arm three (532), the swing arm two (512) is connected to pressure arm two (514) through connecting arm two (513), the other side of the fixed seat two (511) is provided with support frame two (515) that cooperates with the car body, the swing arm three (532) is connected to pressure arm three (534) through connecting arm three (533), the clamping cylinder four (54) is located on one side of fixed seat four (541) in the middle of the base plate (1), clamping cylinder four (54) A rocker arm four (542) is connected to the output shaft of cylinder four (54). The rocker arm four (542) is connected to a pressure arm four (544) via a connecting arm four (543). A support frame four (545) that cooperates with the car body is provided on the other side of the fixed seat four (541). The clamping cylinder five (55) is located on one side of the fixed seat five (551) on the right side of the base plate (1). A rocker arm five (552) is connected to the output shaft of the clamping cylinder five (55). 552) A pressure arm five (554) is connected by a connecting arm five (553). The clamping cylinder six (56) is located on one side of the fixed seat six (561) on the rear side of the base plate (1). A swing arm six (562) is connected to the output shaft of the clamping cylinder six (56). The swing arm six (562) is connected to the pressure arm six (564) by a connecting arm six (563). A support frame six (565) is installed on the base plate (1) below the pressure arm six (564).

5. The automotive body welding fixture according to claim 4, characterized in that: The side of the fixed seat five (551) is provided with a pressing cylinder (57), the piston rod end of the pressing cylinder (57) is provided with a moving plate three (571), and the moving plate three (571) is provided with a pressing arm seven (572) for pressing the side of the car body.

6. The automotive body welding fixture according to claim 4, characterized in that: The second positioning cylinder (34) is located on the outside of the fourth clamping cylinder (54).

7. The automotive body welding fixture according to claim 2, characterized in that: The second positioning cylinder (34) is inclined on the support base (2).

Images