Positioning tool for welding automobile sheet metal parts

Abstract

The application relates to the technical field of automobile manufacturing auxiliary equipment, in particular to a positioning tool for automobile sheet metal part welding, which comprises a base, a supporting column rotatably connected to the base, a positioning platform arranged at the top of the supporting column, a clamping mechanism arranged on the positioning platform, and a first positioning mechanism assembled on the clamping mechanism. An angle adjusting mechanism is arranged on the base and can adjust the angle of the supporting column; the clamping mechanism drives a sliding plate to clamp the sheet metal part through a bidirectional screw; the first positioning mechanism positions the sheet metal part by using a positioning rod and a return spring; the positioning rod is provided with a positioning plane and a first rubber protrusion. A second positioning mechanism with an inclined sliding frame is further arranged on the sliding plate. The tool can adapt to sheet metal parts with different sizes and shapes, the positioning is firm, the angle is adjustable, and the welding precision and efficiency are improved.

Description

Technical Field

[0001] This application relates to the field of automotive manufacturing auxiliary equipment technology, and in particular to a positioning fixture for welding automotive sheet metal parts. Background Technology

[0002] In automobile manufacturing, sheet metal welding is a crucial process. As key automotive components, the welding quality of sheet metal directly impacts the overall structural strength and aesthetic appearance of the vehicle. In traditional automotive sheet metal welding processes, workers typically place the sheet metal parts on a standard workbench and secure them using simple fixing structures such as clamps and bolts before welding. However, this method has several drawbacks. It struggles to adapt easily and effectively to sheet metal parts of different sizes and thicknesses, resulting in poor adaptability and significantly limiting its application. For example, welding small, thin sheet metal parts versus large, thick sheet metal parts often requires frequent changes to different fixing structures, making the process cumbersome and time-consuming.

[0003] To address this issue, a positioning fixture for welding automotive sheet metal parts has been invented to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this utility model is to provide a positioning fixture for welding automotive sheet metal parts, so as to solve the problem of poor adaptability to sheet metal parts of different sizes in the prior art.

[0005] The positioning fixture for welding automotive sheet metal parts provided in this application adopts the following technical solution: including:

[0006] Base;

[0007] The support column is rotatably mounted on the base.

[0008] The positioning platform is located on top of the base;

[0009] The clamping mechanism, set on the positioning platform, is used to clamp automotive sheet metal parts;

[0010] The first positioning mechanism, located on the clamping mechanism, is used to position automotive sheet metal parts.

[0011] Optionally, the base is provided with an angle adjustment mechanism that can adjust the angle of the support column. The angle adjustment mechanism includes a first worm gear, one end of which is provided with a first rotating wheel. The base is provided with a rotatable first worm wheel, which is connected to the support column.

[0012] Optionally, the clamping mechanism includes:

[0013] A sliding groove is formed on the positioning platform;

[0014] The sliding plate is slidably disposed within the sliding groove;

[0015] A bidirectional screw is rotatably mounted on a positioning platform and threadedly connected to a sliding plate;

[0016] The second rotating wheel is located at one end of the bidirectional screw.

[0017] Optionally, the first positioning mechanism includes:

[0018] Positioning holes are formed on the sliding plate;

[0019] A positioning rod, wherein the positioning rod is disposed within a positioning hole;

[0020] The reset spring is fitted between the positioning rod and the sliding plate.

[0021] Optionally, the positioning rod has a positioning plane, and a first rubber protrusion is provided on the side of the positioning rod near the sheet metal part.

[0022] Optionally, a second positioning mechanism is provided on the top of the sliding plate, the second positioning mechanism comprising:

[0023] The fixing groove is set on the sliding plate;

[0024] The second screw is rotatably mounted in the fixed groove;

[0025] A sliding frame is slidably disposed in a fixed groove and threadedly connected to a second screw; the sliding frame is disposed in an inclined direction.

[0026] Positioning bolts are threaded onto the sliding frame;

[0027] The second rubber protrusion is located on the positioning bolt.

[0028] In summary, this application includes the following beneficial technical effects:

[0029] Angle Adjustability: By setting up an angle adjustment mechanism, namely the cooperation of the first worm, the first rotating wheel, and the first worm gear, the angle of the support column can be easily adjusted, thereby changing the angle of the positioning platform. This allows for welding of multiple angles of sheet metal parts without frequent disassembly and assembly during the welding process, improving welding accuracy and reducing potential damage to the sheet metal parts caused by frequent disassembly and assembly.

[0030] Convenient clamping and adjustment functions: The sliding groove, sliding plate, bidirectional screw, and second rotating wheel in the clamping mechanism work together. By rotating the second rotating wheel, the sliding plate can be easily moved, thus facilitating the clamping operation of automotive sheet metal parts of different sizes. This design improves the tooling's adaptability to sheet metal parts of different sizes and expands its application range.

[0031] Precise Positioning: The positioning hole, positioning rod, and return spring in the first positioning mechanism work together. The elastic force of the return spring keeps the positioning rod in constant contact with the sheet metal part, achieving precise positioning. The positioning plane and the first rubber protrusion on the positioning rod further improve the accuracy and stability of positioning, preventing displacement of the sheet metal part during welding and helping to ensure welding quality.

[0032] Enhanced positioning stability: The sliding bracket in the second positioning mechanism is angled, allowing for better fit against sheet metal parts with inclined structures. Combined with the fixing groove, second screw, sliding bracket, positioning bolt, and second rubber protrusion, the position of the sliding bracket can be flexibly adjusted according to the size and inclination of the sheet metal part. The positioning bolt and second rubber protrusion further position and fix the sheet metal part. This not only enhances the stability of the tooling in positioning the sheet metal part but is also particularly suitable for sheet metal parts with inclined structures or complex curved surfaces, reducing the difficulty of welding operations and further improving welding quality. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the device. Figure I ;

[0034] Figure 2 This is a schematic diagram of the overall structure of the device. Figure II ;

[0035] Figure 3 This is the front view of the device;

[0036] Figure 4 For this device Figure 1 Enlarged view of A in the middle;

[0037] The components are as follows: 1. Base; 2. Support column; 3. Positioning platform; 4. Clamping mechanism; 5. First positioning mechanism; 6. Angle adjustment mechanism; 7. First worm gear; 8. First rotating wheel; 9. First worm wheel; 10. Sliding groove; 11. Sliding plate; 12. Bidirectional screw; 13. Second rotating wheel; 14. Positioning hole; 15. Positioning rod; 16. Reset spring; 17. Positioning plane; 18. First rubber protrusion; 19. Second positioning mechanism; 20. Fixing groove; 21. Second screw; 22. Sliding frame; 23. Positioning bolt; 24. Second rubber protrusion. Detailed Implementation

[0038] The present application will be further described in detail below with reference to the accompanying drawings. In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present utility model.

[0039] Reference Figure 1 , Figure 2 , Figure 3 One embodiment is shown as follows: The positioning fixture for welding automotive sheet metal parts includes a base 1, a support column 2 rotatably connected to the top of the base 1 via bearings, a positioning platform 3 fixedly connected to the top of the support column 2 via bolts, a clamping mechanism 4 installed on the upper surface of the positioning platform 3, and a first positioning mechanism 5 mounted on the clamping mechanism 4. In this embodiment, the bearing connection between the support column 2 and the base 1 reduces friction during the rotation of the support column 2, making the rotation of the support column 2 smoother and ensuring the stability of the support column 2 during rotation. The positioning platform 3 is fixed to the support column 2 via bolts, which not only provides a firm connection but also facilitates subsequent disassembly and maintenance. The installation and cooperation between the clamping mechanism 4 and the positioning platform 3 ensures that the clamping force on the sheet metal part is stably applied to the positioning platform 3, avoiding shaking during clamping. The first positioning mechanism 5 mounted on the clamping mechanism 4 can simultaneously achieve precise positioning of the sheet metal part while the clamping mechanism 4 clamps it, improving positioning efficiency.

[0040] The implementation principle of the above embodiment is as follows: the automotive sheet metal parts are placed on the positioning platform 3, and the sheet metal parts are clamped and fixed by the clamping mechanism 4 to prevent the sheet metal parts from shifting during the welding process; the first positioning mechanism 5 contacts the sheet metal parts during the clamping process to achieve positioning of the sheet metal parts and ensure accurate welding position of the sheet metal parts; the support column 2 can rotate relative to the base 1, driving the positioning platform 3 and the sheet metal parts above it to adjust the angle to meet the welding requirements of different angles.

[0041] Reference Figure 3One embodiment shown is as follows: An angle adjustment mechanism 6, capable of adjusting the angle of the support column 2, is installed on the base 1. This mechanism includes a first worm gear 7, which is rotatably connected to a mounting hole inside the base 1 via a bearing. A first rotating wheel 8 is fixedly connected to one end of the first worm gear 7 via a key. A first worm wheel 9 is rotatably connected to the base 1 via a bearing, and the central shaft of the first worm wheel 9 is fixedly connected to the bottom of the support column 2 via a coupling. In this embodiment, the first worm gear 7 is connected to the bearing of the base 1 to ensure the stability of the first worm gear 7 during rotation. To reduce radial sway; the keyed connection between the first rotating wheel 8 and the first worm gear 7 transmits torque, ensuring that the operator can stably drive the first worm gear 7 to rotate when rotating the first rotating wheel 8; the first worm wheel 9 is connected to the bearing of the base 1 to ensure smooth rotation of the first worm wheel 9, while the coupling connection between the first worm wheel 9 and the support column 2 can stably transmit the rotational torque of the first worm wheel 9 to the support column 2, realizing the angle adjustment of the support column 2; the meshing connection between the first worm gear 7 and the first worm wheel 9 has a self-locking function, which allows the support column 2 to remain stable after being adjusted to the target angle and will not rotate automatically due to external force.

[0042] The implementation principle of the above embodiment is as follows: the operator rotates the first rotating wheel 8, which drives the first worm 7 to rotate around its own axis. Since the first worm 7 and the first worm wheel 9 mesh with each other, the rotation of the first worm 7 drives the first worm wheel 9 to rotate around its own axis. The first worm wheel 9 drives the support column 2 to rotate synchronously through the coupling, thereby realizing the angle adjustment of the positioning platform 3 and the sheet metal parts. After the adjustment is completed, the support column 2 maintains the current angle by utilizing the self-locking characteristics of the worm and worm wheel, which facilitates the welding operation.

[0043] Reference Figure 3 , Figure 4One embodiment shown is as follows: The clamping mechanism 4 includes a sliding groove 10, which is formed on the upper surface of the positioning platform 3. A sliding plate 11 is slidably connected to the sliding groove 10 with a clearance fit. A bidirectional screw 12 is rotatably connected to a groove formed inside the positioning platform 3 via a bearing, and both ends of the bidirectional screw 12 are threadedly connected to internal threaded holes formed on the two sliding plates 11 respectively. A second rotating wheel 13 is fixedly connected to one end of the bidirectional screw 12 by welding. In this embodiment, the clearance fit between the sliding groove 10 and the sliding plate 11 ensures that the sliding plate 11 slides smoothly along the sliding groove 10, and also... The sliding plate 11 is kept from wobbling to ensure accurate sliding direction; the bidirectional screw 12 is connected to the bearing of the positioning platform 3, which reduces frictional resistance and makes the rotation smoother; the threaded connection between the bidirectional screw 12 and the sliding plate 11 utilizes the characteristics of threaded transmission, so that when the bidirectional screw 12 rotates, the two sliding plates 11 can move relatively closer or further apart along the axis of the bidirectional screw 12, thereby clamping or releasing the sheet metal parts; the second rotating wheel 13 is welded and fixed to the bidirectional screw 12, which is a firm connection and makes it easy for the operator to drive the bidirectional screw 12 to rotate by rotating the second rotating wheel 13, making the operation less labor-intensive.

[0044] The implementation principle of the above embodiment is as follows: Rotating the second rotating wheel 13 drives the bidirectional screw 12 to rotate around its own axis. Since the threads at both ends of the bidirectional screw 12 turn in opposite directions and are respectively threadedly connected to the two sliding plates 11, the rotation of the bidirectional screw 12 will drive the two sliding plates 11 to move in opposite directions within the sliding groove 10. When the two sliding plates 11 are close to each other, they can clamp the sheet metal parts placed on the positioning platform 3. When the two sliding plates 11 are far apart, they can release the sheet metal parts, thereby achieving clamping and fixing of sheet metal parts of different sizes.

[0045] Reference Figure 1 , Figure 4 One embodiment shown is as follows: The first positioning mechanism 5 includes a positioning hole 14, which is formed on the upper surface of the sliding plate 11. A positioning rod 15 is slidably inserted into the positioning hole 14 with a clearance fit. A reset spring 16 is fitted onto the positioning rod 15, with one end of the reset spring 16 abutting against the annular step in the middle of the positioning rod 15, and the other end abutting against the edge of the opening of the positioning hole 14 on the sliding plate 11. In this embodiment, the clearance fit between the positioning hole 14 and the positioning rod 15 ensures that the positioning rod 15 can move along the positioning hole. The axial sliding of the positioning rod 14 is smooth, while limiting the radial wobble of the positioning rod 15, ensuring accurate positioning direction. The abutment relationship between the reset spring 16 and the positioning rod 15 and the sliding plate 11 allows the positioning rod 15 to remain extended out of the positioning hole 14 under the elastic force of the reset spring 16 when no external force is applied. When the positioning rod 15 is squeezed by the sheet metal part, the reset spring 16 is compressed and stores elastic potential energy. After the sheet metal part is released, the elastic potential energy is released and can push the positioning rod 15 to automatically reset, ensuring the reliability of the next positioning.

[0046] The implementation principle of the above embodiment is as follows: When the clamping mechanism 4 drives the sliding plate 11 to approach the sheet metal part, the positioning rod 15 first contacts the sheet metal part. As the sliding plate 11 continues to move, the sheet metal part exerts pressure on the positioning rod 15, pushing the positioning rod 15 to move along the positioning hole 14 into the sliding plate 11, while compressing the reset spring 16. The elastic force of the reset spring 16 reacts to the positioning rod 15, so that the positioning rod 15 always tightly abuts against the sheet metal part, thereby achieving the positioning of the sheet metal part. After welding is completed, the clamping mechanism 4 drives the sliding plate 11 away from the sheet metal part, and the positioning rod 15 moves outward along the positioning hole 14 under the elastic force of the reset spring 16, restoring the initial position for the next positioning operation.

[0047] Reference Figure 1 , Figure 2 , Figure 4 One embodiment is shown as follows: a positioning plane 17 is provided on a section of the side wall of the positioning rod 15. The positioning plane 17 is a planar structure extending along the axial direction of the positioning rod 15 and is used to abut against the sheet metal part. A first rubber protrusion 18 is glued to one end of the positioning rod 15 near the sheet metal part, and the first rubber protrusion 18 is located on the side where the positioning plane 17 is located. In this embodiment, the positioning plane 17 is provided on a section of the positioning rod 15. When the positioning rod 15 contacts the sheet metal part, the positioning plane 17 abuts against the surface of the sheet metal part, which can increase the contact area with the sheet metal part and improve the positioning stability. The first rubber protrusion 18 is glued to the positioning rod 15, which is firmly connected and easy to replace. The rubber material is elastic. When the positioning plane 17 of the positioning rod 15 abuts against the sheet metal part, the first rubber protrusion 18 can undergo slight deformation, further increasing the friction with the sheet metal part, preventing the sheet metal part from sliding, and avoiding hard contact between the positioning rod 15 and the sheet metal part, which would cause damage to the surface of the sheet metal part.

[0048] The implementation principle of the above embodiment is as follows: the positioning plane 17 is opened on a section of the positioning rod 15 and is used to abut against the sheet metal part. By adhering to the surface of the sheet metal part, the contact area is increased to improve the positioning stability; when the first rubber protrusion 18 abuts against the sheet metal part on the positioning plane 17 of the positioning rod 15, it uses the elastic deformation of the rubber to tightly adhere to the surface of the sheet metal part, which not only enhances the positioning stability, but also plays a buffer protection role, avoiding scratches or indentations on the surface of the sheet metal part.

[0049] Reference Figure 1 , Figure 2One embodiment shown is as follows: A second positioning mechanism 19 is installed on the top of the sliding plate 11. The second positioning mechanism 19 includes a fixing groove 20, which is formed on the top of the sliding plate 11. A second screw 21 is rotatably connected between the inner walls of both ends of the fixing groove 20 via a bearing. A sliding frame 22 is slidably connected to the fixing groove 20 via a clearance fit. A threaded hole at the bottom of the sliding frame 22 is threadedly connected to the second screw 21. A positioning bolt 23 is threadedly connected to a threaded hole at the top of the sliding frame 22. A second rubber protrusion 24 is glued to the end of the positioning bolt 23 near the sheet metal part. In this embodiment, the fixing groove 20 provides installation space for the second screw 21 and the sliding frame 22. The second screw 21 is connected to the bearing of the fixing groove 20 to ensure that the second screw 21 is rotatably connected to the inner walls of the fixing groove 20. The second screw 21 rotates smoothly and its axial position is fixed; the clearance fit between the sliding frame 22 and the fixed groove 20 restricts the rotation of the sliding frame 22, so that the sliding frame 22 can only slide along the length direction of the fixed groove 20; the threaded connection between the sliding frame 22 and the second screw 21 can convert the rotation of the second screw 21 into the linear motion of the sliding frame 22, so as to achieve precise adjustment of the position of the sliding frame 22; the threaded connection between the positioning bolt 23 and the sliding frame 22 allows the extension length of the positioning bolt 23 to be adjusted by screwing in or out, so as to adapt to sheet metal parts of different thicknesses; the second rubber protrusion 24 is glued to the positioning bolt 23, which is a reliable connection. The rubber material can buffer the pressure of the positioning bolt 23 on the sheet metal parts, avoid damage to the sheet metal parts, and at the same time enhance the friction to prevent slippage.

[0050] The implementation principle of the above embodiment is as follows: Rotate the second screw 21, and the second screw 21 drives the sliding frame 22 to slide along the fixed groove 20, adjusting the sliding frame 22 to a suitable position; then screw in the positioning bolt 23, so that the second rubber protrusion 24 on the positioning bolt 23 abuts against the side of the sheet metal part, and the abutting force is maintained by the thread self-locking characteristic of the positioning bolt 23, thereby realizing the positioning of the side of the sheet metal part; the second positioning mechanism 19 cooperates with the first positioning mechanism 5 to position the sheet metal part from different directions, further improving the positioning stability of the sheet metal part and meeting the positioning requirements of complex-shaped sheet metal parts.

[0051] Reference Figure 1 , Figure 2 , Figure 4One embodiment is shown as follows: a sliding frame 22 is tilted and fixedly connected within a fixing groove 20, with its tilt angle matching the tilt angle of a common tilted sheet metal part. The sliding frame 22 is welded to the inner wall of the fixing groove 20. A second screw 21 passes through a threaded hole at the bottom of the sliding frame 22 and is threadedly connected to the sliding frame 22. A positioning bolt 23 is threadedly connected to a threaded hole at the top of the tilted sliding frame 22. In this embodiment, the welding and fixing of the sliding frame 22 to the fixing groove 20 ensures the stability of the tilt angle of the sliding frame 22, preventing it from changing due to external forces. The tilted setting of the sliding frame 22 allows the positioning bolt 23 at its top to remain perpendicular or in contact with the tilted surface of the tilted sheet metal part, increasing the contact area between the positioning bolt 23 and the sheet metal part and improving positioning reliability. The threaded connection between the tilted sliding frame 22 and the second screw 21 ensures that when adjusting the position of the sliding frame 22, the positioning bolt 23 always moves along the direction that matches the tilted surface of the sheet metal part, ensuring accurate positioning.

[0052] The implementation principle of the above embodiment is as follows: For sheet metal parts with inclined surfaces, the inclined sliding frame 22 keeps the axis of the positioning bolt 23 at a suitable angle with the inclined surface of the sheet metal part. When the positioning bolt 23 is screwed in, the second rubber protrusion 24 can tightly fit the inclined surface of the sheet metal part and apply a positioning force to the sheet metal part from the inclined direction. This avoids positioning loosening or surface damage caused by mismatch between the positioning direction and the surface of the sheet metal part. In cooperation with other positioning mechanisms, it achieves stable positioning of the inclined sheet metal part.

[0053] The working principle of this device is as follows: When adjusting the angle, rotating the first rotating wheel 8 drives the first worm gear 7 to rotate, and the meshing first worm wheel 9 drives the support column 2 to rotate, thereby adjusting the angle of the positioning platform 3. When clamping the sheet metal part, rotating the second rotating wheel 13 causes the bidirectional screw 12 to rotate, driving the sliding plate 11 to move closer along the sliding groove 10 and clamp the sheet metal part. In the first positioning mechanism 5, the positioning rod 15 is squeezed into the positioning hole 14 by the sheet metal part, and the spring force of the reset spring 16 keeps it in contact with the sheet metal part. The first rubber protrusion 18 increases friction and protects the surface. The second positioning mechanism 19 adjusts the position of the sliding frame 22 by rotating the second screw 21, tightens the positioning bolt 23, and makes the second rubber protrusion 24 press against the sheet metal part. The tilting sliding frame 22 is adapted to the tilting sheet metal part, and cooperates with the first positioning mechanism 5 to achieve multi-directional stable positioning and ensure the stability of the welding process.

[0054] The working principle of this device has been explained through the above embodiments. These embodiments only illustrate several implementation methods of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A positioning fixture for welding automotive sheet metal parts, characterized in that: include: Base (1); The support column (2) is rotatably mounted on the base (1); The positioning platform (3) is set on top of the base (1); The clamping mechanism (4) is set on the positioning platform (3) and is used to clamp automotive sheet metal parts; The first positioning mechanism (5) is set on the clamping mechanism (4) and is used to position automotive sheet metal parts.

2. The positioning fixture for welding automotive sheet metal parts according to claim 1, characterized in that: The base (1) is provided with an angle adjustment mechanism (6) that can adjust the angle of the support column (2). The angle adjustment mechanism (6) includes a first worm (7), one end of which is provided with a first rotating wheel (8). The base (1) is provided with a rotatable first worm wheel (9), which is connected to the support column (2).

3. The positioning fixture for welding automotive sheet metal parts according to claim 1, characterized in that: The clamping mechanism (4) includes: A sliding groove (10) is provided on the positioning platform (3); The sliding plate (11) is slidably disposed in the sliding groove (10); A bidirectional screw (12) is rotatably mounted on a positioning platform (3) and threadedly connected to a sliding plate (11); The second rotating wheel (13) is located at one end of the bidirectional screw (12).

4. The positioning fixture for welding automotive sheet metal parts according to claim 3, characterized in that: The first positioning mechanism (5) includes: Positioning holes (14) are provided on the sliding plate (11); Positioning rod (15), the positioning rod (15) is disposed in positioning hole (14); The reset spring (16) is fitted between the positioning rod (15) and the sliding plate (11).

5. The positioning fixture for welding automotive sheet metal parts according to claim 4, characterized in that: The positioning rod (15) has a positioning plane (17) and a first rubber protrusion (18) is provided on the side of the positioning rod (15) near the sheet metal part.

6. The positioning fixture for welding automotive sheet metal parts according to claim 3, characterized in that: The top of the sliding plate (11) is provided with a second positioning mechanism (19), the second positioning mechanism (19) includes: A fixing groove (20) is provided on the sliding plate (11); The second screw (21) is rotatably mounted in the fixed groove (20); The sliding frame (22) is slidably disposed in the fixed groove (20) and threadedly connected to the second screw (21). The sliding frame (22) is disposed in an inclined direction. The positioning bolt (23) is threaded onto the sliding frame (22); The second rubber protrusion (24) is set on the positioning bolt (23).

Images