A positioning fixture for assembling the rear side panel of an automobile.

Abstract

This application relates to the field of automotive manufacturing technology and discloses a positioning fixture for assembling a rear side panel assembly of an automobile. It includes a base frame, a positioning platform, positioning pins for positioning irregularly shaped automotive sheet metal parts, and a pneumatic clamp for fixing the irregularly shaped automotive sheet metal parts. A support frame is connected to the bottom of the positioning platform, and a pneumatic control box for connecting the pneumatic clamp is provided on one side of the support frame. Multiple sets of positioning pins and pneumatic clamps are provided to match the irregularly shaped automotive sheet metal parts. A proximity switch is also installed on the positioning platform corresponding to each irregularly shaped automotive sheet metal part, and the proximity switch is electrically connected to the pneumatic control box. Several first connecting plates are provided on the bottom ring of the support frame, and several second connecting plates are provided on the top ring of the base frame. The first and second connecting plates correspond one-to-one, and a positioning rod is inserted into each set of corresponding first and second connecting plates. This application has the effect of improving the production efficiency of the rear side panel assembly of automobiles in a multi-model mixed-line production mode.

Description

Technical Field

[0001] This application relates to the field of automotive manufacturing technology, and in particular to a positioning tooling for assembling a rear side panel assembly of an automobile. Background Technology

[0002] In the automobile manufacturing process, the precision of body assembly directly affects the quality and performance of the entire vehicle. As a key component of the body, the rear side panel assembly faces increasingly stringent requirements for assembly precision with the continuous development of the automotive industry. Traditional manual assembly methods can no longer meet the high precision and high efficiency demands of modern automobile manufacturing. In current automobile manufacturing, the rear side panel assembly is composed of multiple irregularly shaped auto sheet metal parts connected together. Due to the large size of the vehicle body and the complex curved surface structure, the assembly process must rely on positioning fixtures to ensure accuracy. In multi-model mixed-line production mode, the positioning fixtures used on the mounting platform to assemble the rear side panel assembly often need to be adjusted in a timely manner according to the structural differences of the rear side panel of different models in order to smoothly cooperate with the subsequent assembly work of the vehicle's rear side panel assembly. However, in practice, in order to improve the assembly accuracy of the rear side panel assembly of automobiles, when the multi-model mixed production line mode requires the replacement of positioning tooling that matches the model, the assembly of the positioning parts of the tooling one by one and the debugging of the positioning fixture will significantly slow down the production cycle, seriously affect the production efficiency under the multi-model mixed production line mode, and thus restrict the development needs of high-efficiency automobile manufacturing. Utility Model Content

[0003] In order to improve the production efficiency of the rear side panel assembly of automobiles under the multi-model mixed production mode, this application provides a positioning tooling for assembling the rear side panel assembly of automobiles.

[0004] The positioning fixture for assembling a rear side panel assembly of an automobile provided in this application adopts the following technical solution: A positioning fixture for assembling a rear side panel assembly of an automobile includes a base frame, a positioning platform, positioning pins for positioning irregularly shaped auto parts, and a pneumatic clamp for fixing the irregularly shaped auto parts. A support frame is connected to the bottom of the positioning platform, and a pneumatic control box for connecting the pneumatic clamp is provided on one side of the support frame. Multiple sets of positioning pins and pneumatic clamps are provided to match the irregularly shaped auto parts. A proximity switch is also installed on the positioning platform corresponding to each irregularly shaped auto part, and the proximity switch is electrically connected to the pneumatic control box. A plurality of first connecting plates are provided around the bottom of the support frame, and a plurality of second connecting plates are provided around the top of the base frame. The first and second connecting plates correspond one-to-one, and a positioning rod is inserted into each set of corresponding first and second connecting plates.

[0005] By adopting the above technical solution, during the assembly of the rear side panel assembly of automobiles in a multi-model mixed-line production mode, the intelligent robotic arm can connect the required irregularly shaped auto parts to the positioning pins one by one and place them on the positioning platform. Under the monitoring of the proximity switch, an electrical signal can be sent to the pneumatic control box, which controls the pneumatic clamp to fix the irregularly shaped auto parts, thereby enabling welding and fixing operations between the irregularly shaped auto parts. When the multi-model mixed-line production requires changing the positioning fixture to match the model, since the first connecting plate on the bottom side of the support frame and the second connecting plate on the top side of the chassis are connected by positioning pins, the support frame and the positioning platform can be replaced as a whole, while the chassis can be universal. This avoids the need to assemble the positioning parts of the fixture one by one and to adjust the positioning clamp, which not only reduces costs but also greatly improves the production efficiency of the rear side panel assembly of automobiles in a multi-model mixed-line production mode.

[0006] Optionally, the working surface of the positioning platform is inclined.

[0007] By adopting the above technical solution, the inclined setting of the working surface of the positioning platform helps to better adapt to the placement of irregularly shaped auto parts during assembly, and also facilitates the assembly operation for operators, reduces the difficulty and fatigue of operation, and further improves assembly efficiency.

[0008] Optionally, the pneumatic clamp is a Tunkers cylinder.

[0009] By adopting the above technical solution, the Tunkers cylinder can be steplessly adjusted according to the thickness of irregular automotive sheet metal parts, which can better adapt to irregular automotive sheet metal parts of different thicknesses, improve the fixing effect of irregular automotive sheet metal parts of different specifications, enhance the versatility and applicability of positioning tooling, and thus help improve the production efficiency of automotive rear side panel assembly in multi-model mixed production mode.

[0010] Optionally, the top of the base frame is provided with a plurality of positioning blocks, and the top of each positioning block is chamfered towards the center of the base frame. When a plurality of first connecting plates are together confined within the space enclosed by a plurality of positioning blocks, the sidewalls of the first connecting plates abut against the inner sidewalls of the adjacent plurality of positioning blocks.

[0011] By adopting the above technical solution, when multi-model mixed production line requires the replacement of positioning fixtures that match the model, during the installation process of the support frame matching the new model, the first connecting plates on the support frame are guided along the chamfer of the positioning blocks, which can more smoothly enter the space enclosed by the positioning blocks. Moreover, the side wall of the first connecting plate abuts against the inner side wall of the adjacent positioning blocks, avoiding the tedious process of assembling the positioning parts of the fixture one by one and adjusting the positioning fixture, and improving the efficiency and accuracy of assembling the positioning fixture.

[0012] Optionally, the base frame is circumferentially equipped with multiple universal positioning wheels at its bottom and has a movable handle connected to its side wall.

[0013] By adopting the above technical solutions, the universal positioning wheels and the movable handle facilitate the movement and positioning of the positioning fixture, enabling the positioning fixture to adapt more flexibly to different working positions and scenarios, and improving the ease of use and versatility of the fixture in multi-model mixed-line production.

[0014] Optionally, the bottom of the base frame is evenly distributed with a number of lifting cylinders, the bottom of the cylinders of the lifting cylinders are vertically connected to a support base plate, and the top of the piston rods of the lifting cylinders are vertically connected to the bottom wall of the base frame.

[0015] By adopting the above technical solution, the lifting cylinder compensates for the lack of line contact of the universal positioning wheel, and the support base plate connected to its bottom can provide more stable support for the base frame, making the positioning fixture more stable during operation.

[0016] Optionally, the pressure block of the tunkers cylinder is hinged to the top of the side wall of its own cylinder body on the bottom arm of the clamping arm. The side wall of the tunkers cylinder body facing the pressure block is provided with a guide groove, and a slider is slidably arranged in the guide groove. A telescopic rod is connected between the pressure block and the cylinder body of the tunkers cylinder. The telescopic rod is horizontally arranged, with one end vertically connected to the side wall of the pressure block of the tunkers cylinder and the other end vertically connected to the slider.

[0017] By adopting the above technical solution, under the guidance of the guide vertical groove, and using the vertically connected telescopic rod, the bottom wall of the pressure block of the Tunkers cylinder remains parallel to the cylinder body when the clamping arm is flipped, thus maintaining its clamping contact area for irregularly shaped auto parts, thereby improving the clamping stability and reliability of irregularly shaped auto parts, and helping to improve the assembly accuracy of the rear side panel assembly of the automobile.

[0018] Optionally, a spring is inserted into the guide groove, and the spring abuts against the inner end wall of the guide groove and the slider.

[0019] By adopting the above technical solution, the spring can apply an elastic force to the slider, so that the pressure block of the tunkers cylinder has a buffering and resetting effect during operation, which improves the fixing stability of irregular automotive sheet metal parts and extends the service life of the tunkers cylinder.

[0020] In summary, this application includes at least one of the following beneficial technical effects: 1. In the assembly process of the automotive rear side panel assembly under a multi-model mixed-line production mode, an intelligent robotic arm can connect the required irregularly shaped automotive sheet metal parts one by one to the positioning pins and place them on the positioning platform. Under the monitoring of proximity switches, an electrical signal can be sent to the pneumatic control box, which controls the pneumatic clamps to fix the irregularly shaped automotive sheet metal parts, thereby enabling welding and fixing operations between the irregularly shaped automotive sheet metal parts. When the multi-model mixed-line production requires changing the positioning fixture to match the model, since the first connecting plate on the bottom side of the support frame and the second connecting plate on the top side of the chassis are connected by positioning pins, the support frame and the positioning platform can be replaced as a whole, while the chassis can be universal. This avoids the need to assemble the positioning parts of the fixture one by one and to adjust the positioning clamps, which not only reduces costs but also greatly improves the production efficiency of the automotive rear side panel assembly under the multi-model mixed-line production mode. 2. The inclined design of the positioning support platform helps to better accommodate the placement of irregularly shaped auto parts during assembly, and also makes it easier for operators to perform assembly operations, reducing operational difficulty and fatigue, and further improving assembly efficiency. 3. Tunkers cylinders can be steplessly adjusted according to the thickness of irregularly shaped auto parts, which can better adapt to irregularly shaped auto parts of different thicknesses, improve the fixing effect of irregularly shaped auto parts of different specifications, enhance the versatility and applicability of positioning tooling, and thus help improve the production efficiency of the rear side panel assembly of automobiles in multi-model mixed production mode. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0022] Figure 2 yes Figure 1 Enlarged view of point A in the middle.

[0023] Figure 3 This is a schematic diagram of the pneumatic clamp in Embodiment 1 of this application.

[0024] Figure 4 This is a schematic diagram of the pneumatic clamp in Embodiment 2 of this application.

[0025] Figure 5 This is a cross-sectional view of the connection relationship between the telescopic rod, the pressure block, and the slider in Embodiment 2 of this application.

[0026] Explanation of reference numerals in the attached figures: 1. Base frame; 11. Universal positioning wheel; 12. Moving handle; 13. Lifting cylinder; 131. Support base plate; 14. Positioning block; 15. Second connecting plate; 2. Positioning support platform; 3. Positioning pin; 4. Pneumatic clamp; 41. Bracket base; 42. Mounting bracket; 43. Support block; 44. Cylinder body; 441. Guide vertical groove; 4411. Slider; 4412. Spring; 45. Angle plate; 46. Clamping arm; 47. Pressure block; 5. Support frame; 51. First connecting plate; 6. Proximity switch; 7. Pneumatic control box; 8. Positioning rod; 9. Telescopic rod. Detailed Implementation

[0027] The following is in conjunction with the appendix Figures 1-5 This application will be described in further detail.

[0028] This application discloses a positioning fixture for assembling the rear side panel assembly of an automobile.

[0029] Example 1 Reference Figure 1 The positioning fixture for assembling the rear side panel of an automobile provided in this application includes a base frame 1, a positioning platform 2, positioning pins 3, and a pneumatic clamp 4. A support frame 5 is fixedly installed at the bottom of the positioning platform 2. The support frame 5 is detachably mounted on the top of the base frame 1. Multiple sets of positioning pins 3 and pneumatic clamps 4 are set according to the number of irregular auto parts and are distributed and installed on the worktable of the positioning platform 2. A proximity switch 6 is also installed on the positioning platform 2 for each irregular auto part. A pneumatic control box 7 is installed on one side of the support frame 5, and the proximity switch 6 is electrically connected to the pneumatic control box 7.

[0030] Reference Figure 1 In the assembly process of the rear side panel of a car under the multi-model mixed production line mode, the required irregular auto parts are connected to the positioning pins 3 one by one and placed on the positioning support 2. When the proximity switch 6 detects that the irregular auto parts are in place, it sends a signal to the pneumatic control box 7. In actual operation, the pneumatic control box 7 is connected to the pneumatic clamp 4 through the air pipe. By controlling the air in and out through the pneumatic control box 7, the corresponding pneumatic clamp 4 is activated, which clamps the irregular auto parts. After all the irregular auto parts of the rear side panel of the car are fixed, the subsequent welding and fixing operations between the irregular auto parts can be carried out.

[0031] Reference Figure 1 The base frame 1 is a general-purpose load-bearing device. It has a universal positioning wheel 11 installed at each of the four corners of its bottom circumference, and a moving handle 12 is welded to the side wall of the base frame 1. The universal positioning wheel 11 allows the base frame 1 to be moved and its position adjusted easily, while the moving handle 12 makes it easy for the operator to push the base frame 1.

[0032] Reference Figure 1To compensate for the insufficient contact between the universal positioning wheel 11 and the ground line and to improve the stability of the positioning fixture during operation, a number of lifting cylinders 13 are fixedly connected to the bottom of the base frame 1. In this embodiment, four cylinders are used as an example. The four lifting cylinders 13 are evenly distributed at the bottom of the base frame 1 and correspond one-to-one with the universal positioning wheel 11. The bottom of the four lifting cylinders 13 are vertically connected to a support base plate 131. The top of the piston rod of the four lifting cylinders 13 is vertically connected to the bottom wall of the base frame 1. The support base plate 131 can provide more stable support for the base frame 1.

[0033] Reference Figure 1 and Figure 2 The top of the base frame 1 is provided with several positioning blocks 14. In this embodiment, two are fixedly set at each corner. The top of each positioning block 14 is chamfered towards the center of the base frame 1. A first connecting plate 51 is horizontally fixedly connected to each of the four bottom corners of the support frame 5. Correspondingly, a second connecting plate 15 is horizontally fixedly connected to each of the four top corners of the base frame 1. A positioning rod 8 is inserted into each set of corresponding first connecting plate 51 and second connecting plate 15. The positioning rod 8 can quickly position and connect the support frame 5 and the base frame 1 together, improving the efficiency of tooling assembly.

[0034] Reference Figure 1 and Figure 2 When several first connecting plates 51 are jointly confined within the space enclosed by multiple positioning blocks 14, the sidewalls of the first connecting plates 51 abut against the inner sidewalls of the adjacent positioning blocks 14. This arrangement of positioning blocks 14 can further improve the accuracy and stability of the connection between the support frame 5 and the base frame 1, and improve the efficiency of tooling change during multi-model mixed-line production, thereby increasing production efficiency.

[0035] Reference Figure 1 To improve ease of operation, the working surface of the positioning platform 2 is set at an angle. In the assembly platform, the angled working surface can better adapt to ergonomics and reduce operator fatigue.

[0036] Reference Figure 1 The positioning pin 3 is used to position irregularly shaped auto parts. Its shape can be designed according to the positioning holes of the irregularly shaped auto parts. Common types include cylindrical pins and conical pins. In this embodiment, a cylindrical pin is used as an example.

[0037] Reference Figure 3 The pneumatic clamp 4 is used to fix irregularly shaped auto parts sheet metal parts. In this embodiment, the pneumatic clamp 4 is a Tunkers cylinder. The Tunkers cylinder is a commercially available stepless adjustable angle quick-release pneumatic clamp 4, which has the advantages of rapid action and adjustable clamping force. It typically includes a bracket base 41, a mounting bracket 42, a support block 43, a cylinder body 44, an angle plate 45, a clamping arm 46, and a pressure block 47.

[0038] Reference Figure 3 The mounting bracket 42 is bolted to the top of the bracket base 41, and the support block 43 is bolted to the top of one end of the mounting bracket 42. In this embodiment, it is used to support irregularly shaped auto parts. The cylinder body 44 is fixedly installed on the side wall of the mounting bracket 42 away from the support block 43. The angle plate 45 is electroplated on the side wall of the cylinder body 44. The clamping arm 46 is pneumatically connected to the cylinder body 44, and the center of the angle plate 45 coincides with the axis of rotation of the clamping arm 46. The pressure block 47 is bolted to the free end of the clamping arm 46. During the rotation of the clamping arm 46, the irregularly shaped auto parts are clamped and pressed against the support block 43.

[0039] The implementation principle of a positioning fixture for assembling a rear side panel assembly of an automobile, as described in this application, is as follows: During multi-model mixed-line production, the support frame 5 and the base frame 1 are quickly connected together via the positioning pin 8, reducing the assembly and debugging time of the positioning parts and improving the efficiency of tooling changeover. Then, by setting multiple sets of positioning pins 3 and pneumatic clamps 4, irregularly shaped automotive sheet metal parts can be quickly positioned and fixed. Simultaneously, the inclined working surface of the positioning platform 2, the special structure of the Tunkers cylinder, the detection of the proximity switch 6, and the positioning of the positioning block 14 further improve the ease of use and stability of the fixture, thereby increasing the production efficiency of the rear side panel assembly of the automobile under multi-model mixed-line production mode. Compared with traditional tooling, it significantly improves the production cycle time, meeting the high-efficiency development needs of modern automobile manufacturing.

[0040] Example 2 Reference Figure 4 and Figure 5 The difference between this embodiment and embodiment 1 is that the pressure block 47 of the tunkers cylinder is hinged to the bottom arm of the clamping arm 46 on the top of the side wall of the cylinder body 44 facing itself. The cylinder body 44 of the tunkers cylinder has a guide groove 441 on the side wall facing the pressure block 47. A slider 4411 is slidably arranged in the guide groove 441. The slider 4411 and the guide groove 441 are slidably engaged. A telescopic rod 9 is connected between the pressure block 47 of the tunkers cylinder and the cylinder body 44. The telescopic rod 9 is horizontally arranged. One end of the telescopic rod 9 is vertically fixed to the side wall of the pressure block 47 of the tunkers cylinder, and the other end is vertically fixed to the slider 4411. Guided by the guide groove 441, the telescopic rod 9 connected vertically ensures that when the clamping arm 46 of the tunkers cylinder is flipped, the bottom wall of the pressure block 47 remains parallel to the cylinder body 44, maintaining the clamping contact area of ​​the irregularly shaped auto parts sheet metal, thereby improving the clamping stability and reliability of the irregularly shaped auto parts sheet metal.

[0041] Reference Figure 4 and Figure 5In order to enable the pressure block 47 to reset quickly and improve work efficiency, a spring 4412 is inserted into the guide groove 441. The spring 4412 abuts against the inner end wall of the guide groove 441 and the slider 4411.

[0042] The implementation principle of Example 2 is as follows: Under the guidance of the guide vertical groove 441, the telescopic rod 9 connected vertically is used to ensure that when the clamping arm 46 of the tunkers cylinder is flipped, the bottom wall of the pressure block 47 is always parallel to the cylinder body 44, maintaining its clamping contact area for irregularly shaped auto parts, thereby improving the clamping stability and reliability of irregularly shaped auto parts, and under the reset action of the spring 4412, it helps to improve the assembly accuracy of the rear side panel assembly of the car.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A positioning fixture for assembling a rear side panel assembly of an automobile, characterized in that, The system includes a base frame (1), a positioning platform (2), positioning pins (3) for positioning irregularly shaped auto parts, and a pneumatic clamp (4) for fixing the irregularly shaped auto parts. A support frame (5) is connected to the bottom of the positioning platform (2). A pneumatic control box (7) for connecting the pneumatic clamp (4) is provided on one side of the support frame (5). The positioning pins (3) and the pneumatic clamp (4) are configured to match multiple sets of irregularly shaped auto parts. The positioning platform (2) also has a corresponding fixture for each irregularly shaped auto part. The automotive sheet metal parts are equipped with a proximity switch (6), which is electrically connected to the pneumatic control box (7). The bottom side of the support frame (5) is provided with a number of first connecting plates (51), and the top side of the base frame (1) is provided with a number of second connecting plates (15). The first connecting plates (51) and the second connecting plates (15) correspond one-to-one, and each set of corresponding first connecting plates (51) and second connecting plates (15) is connected to a positioning rod (8).

2. The positioning fixture for assembling a rear side panel assembly of an automobile according to claim 1, characterized in that, The working surface of the positioning platform (2) is inclined.

3. The positioning fixture for assembling a rear side panel assembly of an automobile according to claim 1, characterized in that, The pneumatic clamp (4) is a Tunkers cylinder.

4. A positioning fixture for assembling a rear side panel assembly of an automobile according to claim 1, characterized in that, The top of the base frame (1) is provided with a plurality of positioning blocks (14). The top of each positioning block (14) is chamfered towards the center of the base frame (1). When a plurality of first connecting plates (51) are together confined within the space enclosed by a plurality of positioning blocks (14), the side wall of the first connecting plate (51) and the inner side wall of the adjacent plurality of positioning blocks (14) are together abutted.

5. A positioning fixture for assembling a rear side panel assembly of an automobile according to claim 1, characterized in that, The bottom of the base frame (1) is circumferentially equipped with multiple universal positioning wheels (11) and the side wall is connected to a movable handle (12).

6. A positioning fixture for assembling a rear side panel assembly of an automobile according to claim 1, characterized in that, The bottom of the base frame (1) is evenly distributed with a number of lifting cylinders (13), the bottom of the cylinders of the lifting cylinders (13) are vertically connected to the support base plate (131), and the top of the piston rods of the lifting cylinders (13) are vertically connected to the bottom wall of the base frame (1).

7. A positioning fixture for assembling a rear side panel assembly of an automobile according to claim 3, characterized in that, The pressure block (47) of the tunkers cylinder is hinged to the bottom arm of the clamping arm (46) at the top of the side wall of the cylinder body (44). The side wall of the cylinder body (44) of the tunkers cylinder facing the pressure block (47) is provided with a guide groove (441). A slider (4411) is slidably arranged in the guide groove (441). A telescopic rod (9) is connected between the pressure block (47) of the tunkers cylinder and the cylinder body (44). The telescopic rod (9) is horizontally arranged. One end of the telescopic rod (9) is vertically connected to the side wall of the pressure block (47) of the tunkers cylinder, and the other end is vertically connected to the slider (4411).

8. A positioning fixture for assembling a rear side panel assembly of an automobile according to claim 7, characterized in that, A spring (4412) is inserted into the guide groove (441), and the spring (4412) abuts against the inner end wall of the guide groove (441) and the slider (4411).

Images