Positioning device for electric resistance welding of oil tank assembly

Abstract

The utility model provides a positioning device for resistance welding of an oil tank assembly. The positioning device is characterized by comprising a positioning bracket, the longitudinal moving structure is fixed on the positioning bracket, and the longitudinal moving structure is provided with a longitudinal moving block; the transverse moving structure is connected to the longitudinal moving block of the longitudinal moving mechanism, and the transverse moving structure is provided with a transverse moving block; the positioning assembly is installed on the transverse moving block, the positioning assembly comprises a positioning plate, a positioning seat is fixed to the positioning plate, a rotating mechanism is installed in the positioning seat, a profiling plate is fixed to the rotating mechanism, and the profiling plate is fixed to the positioning seat. And the profiling plate is provided with a profiling surface matched with the profile of the lower surface of the lower shell of the oil tank assembly. The positioning device is simple in structure, can realize quick positioning of the oil tank assembly, is more accurate during transverse and longitudinal movement, can keep the edge of the oil tank assembly horizontal, and ensures the welding quality.

Description

Technical Field

[0001] The utility model relates to the technical field of oil tank welding, in particular to a positioning device for resistance welding of an oil tank assembly. Background Art

[0002] In the manufacture of traditional square fuel tank assemblies, welding is typically used to connect the upper and lower shells of the tank assembly. In the tank assembly structure, the upper shell has an upper edge, while the lower shell has a lower edge. To achieve a secure connection between the upper and lower edges, resistance welding is typically used. This welding method allows the upper and lower shells of the tank to maintain structural integrity and stability under various operating conditions, ensuring the safe storage and transportation of fuel products. However, during resistance welding, the tank assembly must be moved to ensure that all edges are securely welded. However, since the tank assembly has four edges, welding adjacent edges requires rotating the tank 90 degrees. After this rotation, the tank must also be moved longitudinally for a more accurate welding process. Manual translation or rotation of the tank assembly is inefficient and results in poor weld consistency. Furthermore, the tank will move up and down during movement. Utility Model Content

[0003] In response to the shortcomings of the existing technology, the utility model provides a positioning device for resistance welding of a fuel tank assembly. The positioning device has a simple structure and can achieve rapid positioning of the fuel tank assembly. At the same time, it is more accurate when moving horizontally and vertically, and can keep the edge of the fuel tank assembly level, thereby ensuring the quality of welding.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical solution: a positioning device for resistance welding of a fuel tank assembly, characterized in that:

[0005] a positioning bracket;

[0006] a longitudinal moving structure, the longitudinal moving structure being fixed on the positioning bracket and having a longitudinal moving block;

[0007] a transverse moving structure connected to the longitudinal moving block of the longitudinal moving mechanism, the transverse moving structure comprising a transverse moving block;

[0008] A positioning assembly is installed on the transverse moving block. The positioning assembly includes a positioning plate, a positioning seat is fixed on the positioning plate, a rotating mechanism is installed in the positioning seat, and a contour plate is fixed on the rotating mechanism. The contour plate has a contour surface that matches the lower surface contour of the lower shell of the fuel tank assembly.

[0009] Furthermore, the positioning bracket is formed by welding a plurality of steel beams.

[0010] Furthermore, the longitudinal movement mechanism includes a first slide rail and a second slide rail, and the first slide rail and the second slide rail are both slidably connected with a longitudinal movement block. The transverse movement structure includes a third slide rail and a fourth slide rail, and the third slide rail and the fourth slide rail are both slidably connected with a transverse movement block.

[0011] Furthermore, the positioning seat is movably connected to the positioning plate via a movable pin, and a buffer spring is provided on the outer sleeve of the movable pin.

[0012] Furthermore, a bearing hole is provided in the positioning seat, the rotating mechanism includes a rotating bearing and a connecting seat, the connecting seat includes a seat plate, a connecting column is provided below the seat plate, the connecting column has a step portion, the rotating bearing is installed in the bearing hole, the connecting seat is clamped in the inner ring of the rotating bearing through the step portion thereon, and the contour plate is fixedly connected to the seat plate of the connecting seat.

[0013] Furthermore, a moving wheel is connected below the positioning bracket.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] 1. The positioning device has a simple structure and can realize the rapid positioning of the fuel tank assembly. At the same time, it is more accurate when moving horizontally and vertically, and can keep the edge of the fuel tank assembly level to ensure the quality of welding;

[0016] 2. The longitudinal movement of the fuel tank assembly is achieved through the longitudinal movement mechanism, the lateral movement of the fuel tank is achieved through the lateral movement structure, and the rotation of the fuel tank assembly is achieved through the rotation mechanism. The operation is easy and the consistency of the fuel tank welding is ensured;

[0017] 3. Since the profiling plate is fixedly connected to the seat plate of the connecting seat, the profiling surface on it can fit with the lower shell of the fuel tank assembly, thereby achieving rapid positioning. At the same time, the profiling plate can be quickly replaced according to the needs of different products, making the positioning device have a wider range of applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a three-dimensional diagram of the utility model;

[0019] Figure 2 This is a structural diagram of the utility model after removing the fuel tank assembly;

[0020] Figure 3 This is a diagram showing the connection structure of the positioning plate and the positioning seat of the utility model;

[0021] Figure 4 This utility model is Figure 3 sectional view.

[0022] In the figure: 1. Positioning bracket; 2. Longitudinal moving block; 3. Transverse moving block; 4. Positioning plate; 5. Positioning seat; 6. Profiling plate; 7. Lower housing of fuel tank assembly; 8. Steel beam; 9. First slide rail; 10. Second slide rail; 11. Third slide rail; 12. Fourth slide rail; 13. Buffer spring; 14. Movable pin; 15. Bearing hole; 16. Rotary bearing; 17. Connecting seat; 18. Seat plate; 19. Connecting column; 20. Step portion; 21. Resistance welding machine; 22. Moving wheel; DETAILED DESCRIPTION

[0023] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0024] like Figure 1-4 As shown, the embodiment of the present utility model provides a positioning device for resistance welding of a fuel tank assembly, a positioning bracket 1;

[0025] a longitudinal moving structure, the longitudinal moving structure being fixed on the positioning bracket 1 and having a longitudinal moving block 2;

[0026] a transverse moving structure connected to the longitudinal moving block 2 of the longitudinal moving mechanism, the transverse moving structure having a transverse moving block 3;

[0027] A positioning assembly is installed on the lateral moving block 3, and the positioning assembly includes a positioning plate 4, a positioning seat 5 is fixed on the positioning plate 4, a rotating mechanism is installed in the positioning seat 5, and a contour plate 6 is fixed on the rotating mechanism. The contour plate 6 has a contour surface that matches the lower surface contour of the lower shell 7 of the fuel tank assembly.

[0028] The process of using the present invention is as follows: when it is necessary to weld the upper shell and the lower shell of the fuel tank assembly, first select the matching profiling plate 6 according to the model of the fuel tank assembly, fix the profiling plate 6 to the rotating mechanism of the positioning seat 5, then move the positioning device to the bottom of the resistance welding machine 21, position the fuel tank assembly to be welded on the profiling plate 6, then move the fuel tank assembly longitudinally and transversely so that the fuel tank assembly moves to the initial position, and then move the fuel tank assembly transversely. During the transverse movement, the edge of the fuel tank assembly begins to be between the two electrodes of the resistance welding machine 21 (only need to be moved transversely). Just make sure that the edge of the fuel tank assembly is between the two electrodes. Because the edge is wide, even if there is a slight deviation when the operator moves the fuel tank assembly, it will not affect the welding effect of the fuel tank assembly, because in the next step, the fuel tank shell needs to be roll welded). The two electrodes weld its edges. After welding one point, continue to move the fuel tank assembly and weld the next point. When one of the edges is welded, rotate the fuel tank assembly 90 degrees and move it horizontally and vertically again to return to the original position and weld the adjacent edges. Repeat the above actions until all the edges are welded.

[0029] The positioning bracket 1 is formed by welding a plurality of steel beams 8. Specifically, the positioning bracket 1 of the present invention is formed by welding the steel beams 8, which has a simple process, low cost and lighter weight.

[0030] The longitudinal movement mechanism includes a first slide rail 9 and a second slide rail 10, each of which is slidably connected to a longitudinal movement block 2. The transverse movement structure includes a third slide rail 11 and a fourth slide rail 12, each of which is slidably connected to a transverse movement block 3. Specifically, the longitudinal movement mechanism and the transverse movement structure of the utility model both use slide rails. Using a slide rail structure allows for smoother movement, a simpler structure, and easier maintenance.

[0031] The positioning seat 5 is movably connected to the positioning plate 4 via a movable pin 14, and a buffer spring 13 is provided on the outer sleeve of the movable pin 14. Specifically, the positioning seat 5 of the present invention is movably connected to the positioning pin via the buffer spring 13. In this way, the edge of the fuel tank assembly can have a gap with both the upper electrode and the lower electrode. When the fuel tank assembly shell moves, it will not interfere with the lower electrode. When the upper electrode is downward for electric welding, it will squeeze the fuel tank assembly, causing the lower surface of the edge of the fuel tank assembly to contact the lower electrode, thereby completing the spot welding.

[0032] A bearing hole 15 is defined in the positioning seat 5. The rotating mechanism includes a rotating bearing 16 and a connecting seat 17. The connecting seat 17 includes a seat plate 18. Below the seat plate 18 is a connecting post 19, which has a stepped portion 20. The rotating bearing 16 is mounted in the bearing hole 15. The connecting seat 17 is engaged with the inner race of the rotating bearing 16 via the stepped portion 20. The profiling plate 6 is fixedly connected to the seat plate 18 of the connecting seat 17. Specifically, the rotating mechanism of the present invention comprises a rotating bearing 16 and a connecting seat 17. The connecting seat 17 is connected to the inner race of the rotating bearing 16 via the connecting post 19, thereby enabling the connecting seat 17 to rotate. Furthermore, because the profiling plate 6 is fixedly connected to the seat plate 18 of the connecting seat 17 via screws, it can be quickly replaced to meet the requirements of different products.

[0033] The bottom of the positioning bracket 1 is connected to a moving wheel 22. Specifically, the bottom of the positioning bracket 1 of the present invention is connected to the moving wheel 22, and the moving wheel 22 can be a universal wheel, so it is convenient to move the device. When resistance welding needs to weld other products, the device can be quickly transferred.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A positioning device for resistance welding of a fuel tank assembly, characterized in that: a positioning bracket; a longitudinal moving structure, the longitudinal moving structure being fixed on the positioning bracket and having a longitudinal moving block; a transverse moving structure connected to the longitudinal moving block of the longitudinal moving mechanism, the transverse moving structure comprising a transverse moving block; A positioning assembly is installed on the transverse moving block. The positioning assembly includes a positioning plate, a positioning seat is fixed on the positioning plate, a rotating mechanism is installed in the positioning seat, and a contour plate is fixed on the rotating mechanism. The contour plate has a contour surface that matches the lower surface contour of the lower shell of the fuel tank assembly.

2. The fuel tank assembly resistance welding positioning device according to claim 1, characterized in that: The positioning bracket is formed by welding a plurality of steel beams.

3. The fuel tank assembly resistance welding positioning device according to claim 2, characterized in that: The longitudinal movement mechanism includes a first slide rail and a second slide rail, and the first slide rail and the second slide rail are both slidably connected with a longitudinal movement block. The transverse movement structure includes a third slide rail and a fourth slide rail, and the third slide rail and the fourth slide rail are both slidably connected with a transverse movement block.

4. A fuel tank assembly resistance welding positioning device according to claim 3, characterized in that: The positioning seat is movably connected to the positioning plate through a movable pin, and a buffer spring is provided on the outer sleeve of the movable pin.

5. The fuel tank assembly resistance welding positioning device according to claim 4, characterized in that: A bearing hole is provided in the positioning seat, the rotating mechanism includes a rotating bearing and a connecting seat, the connecting seat includes a seat plate, a connecting column is provided below the seat plate, the connecting column has a step portion, the rotating bearing is installed in the bearing hole, the connecting seat is clamped in the inner ring of the rotating bearing through the step portion thereon, and the profiling plate is fixedly connected to the seat plate of the connecting seat.

6. The fuel tank assembly resistance welding positioning device according to claim 5, characterized in that: A moving wheel is connected below the positioning bracket.

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