Contactor laser welding universal clamp

Abstract

The invention discloses a universal clamp for laser welding of a contactor. A handle is connected with a connecting rod through a cylindrical pin A; the handle is further connected with a positioning disc through a cylinder head screw, and a positioning block is arranged in a central groove of the positioning disc; the two sides of the central groove of the positioning disc are connected with the pressing plate through cylindrical pins B respectively; a big-end-up through hole is formed in each of two sides of the positioning disc, a pressure spring is arranged at the lower part in the big hole, and a guide sleeve is arranged in the big hole at the upper part of the pressure spring; the lower portion of the pull rod A penetrates out of the positioning disc and then is connected with the left end of the connecting rod through a cylindrical pin C. The upper portion of the pull rod A penetrates out of the positioning disc and then is fixed through a gasket and a hexagon nut. The lower portion of the pull rod B penetrates out of the positioning disc and then is connected with the right end of the connecting rod through a cylindrical pin C. The upper portion of the pull rod B penetrates out of the positioning disc and then is fixed through a limiting screw. Qualified assemblies are welded, the production qualification rate is guaranteed, the structure is easy to operate, operation is convenient, and universality is high.

Description

Technical Field

[0001] This invention relates to a universal welding fixture, and more particularly to a universal fixture for contactor laser welding. Background Technology

[0002] Because the electromagnet assemblies of a certain type of contactor have similar structures, all consisting of part 1, part 2, and part 3, such as... Figure 1 As shown, the components have similar external dimensions. However, due to the high airtightness requirements for welding and the fact that all components are rectangular, they cannot be directly clamped on the laser welding machine chuck. Therefore, during welding, part 1 and part 2 are first welded together to form... After assembling the components, weld part 3 together with the assembled components as shown in the diagram.

[0003] Existing fixtures cannot weld qualified components or guarantee the production pass rate. There is an urgent need to design a fixture that can greatly improve the pass rate of this type of electromagnet base plate assembly during use. Summary of the Invention

[0004] The present invention aims to solve the technical problem of being able to weld qualified components to ensure the production qualification rate, and to greatly improve the qualification rate of this type of electromagnet base plate assembly during use.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A universal fixture for laser welding of contactors includes a handle, a cylindrical pin A, a connecting rod, a cylindrical head screw, a positioning plate, a positioning block, a cylindrical pin B, a pressure plate, a pressure spring, a guide sleeve, a pull rod A, a cylindrical pin C, a washer, a hexagonal nut, a pull rod B, and a limit screw. The handle is connected to the connecting rod via the cylindrical pin A. The handle is also connected to the positioning plate via the cylindrical head screw, and a positioning block is provided in the central groove of the positioning plate. The two sides of the central groove of the positioning plate are respectively connected to the pressure plate via cylindrical pins B. There is a through hole on each side, which is larger at the top and smaller at the bottom. A pressure spring is installed in the lower part of the larger hole, and a guide sleeve is installed in the larger hole above the pressure spring. A pull rod A is installed in the through hole on the left side. The lower part of the pull rod A passes through the positioning plate and is connected to the left end of the connecting rod through a cylindrical pin C. The upper part of the pull rod A passes through the positioning plate and is fixed by a washer and a hexagonal nut. A pull rod B is installed in the through hole on the right side. The lower part of the pull rod B passes through the positioning plate and is connected to the right end of the connecting rod through a cylindrical pin C. The upper part of the pull rod B passes through the positioning plate and is fixed by a limit screw.

[0006] The beneficial effects of adopting the above technical solution are: This invention solves the problem of ensuring the production qualification rate by welding qualified components. It can greatly improve the qualification rate of this type of electromagnet base plate assembly during use. Moreover, the structure is simple to operate, convenient to operate, and highly versatile. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of an existing contactor welding fixture.

[0008] Figure 2 This is a schematic diagram of the universal fixture structure for laser welding of contactors according to the present invention.

[0009] Figure 3 for Figure 2 Top view.

[0010] In the diagram: 1-Handle, 2-Cylindrical pin A, 3-Connecting rod, 4-Cylindrical head screw, 5-Positioning plate, 6-Positioning block, 7-Cylindrical pin B, 8-Pressure plate, 9-Pressure spring, 10-Guide sleeve, 11-Pull rod A, 12-Cylindrical pin C, 13-Washer, 14-Hex nut, 15-Pull rod B, 16-Limit screw.

[0011] Figure 4 for Figure 1 Schematic diagram of the middle handle structure.

[0012] Figure 5 for Figure 4 Left view.

[0013] Figure 6 for Figure 1 Schematic diagram of the central positioning disk structure.

[0014] Figure 7 for Figure 6 Left sectional view.

[0015] Figure 8 for Figure 1 Schematic diagram of tie rod A.

[0016] Figure 9 for Figure 8 Top view.

[0017] Figure 10 for Figure 1 Schematic diagram of the connecting rod structure.

[0018] Figure 11 for Figure 10 Top view.

[0019] Figure 12 for Figure 10 Left view.

[0020] Figure 13 for Figure 1 Schematic diagram of tie rod B.

[0021] Figure 14 for Figure 13 Top view.

[0022] Figure 15 for Figure 1Schematic diagram of the middle guide sleeve structure.

[0023] Figure 16 for Figure 15 Left view.

[0024] Figure 17 for Figure 1 Schematic diagram of the middle limit screw structure.

[0025] Figure 18 for Figure 17 Left view.

[0026] Figure 19 for Figure 1 Schematic diagram of three specifications of medium pressure plate.

[0027] Figure 20 for Figure 19 Top view.

[0028] Figure 21 for Figure 1 Schematic diagram of three specifications of the center positioning block.

[0029] Figure 22 for Figure 21 Left view. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are only for explaining the present invention and are not intended to limit the present invention.

[0031] A universal fixture for laser welding of contactors includes a handle 1, a cylindrical pin A2, a connecting rod 3, a cylindrical head screw 4, a positioning plate 5, a positioning block 6, a cylindrical pin B7, a pressure plate 8, a pressure spring 9, a guide sleeve 10, a pull rod A11, a cylindrical pin C12, a washer 13, a hexagonal nut 14, a pull rod B15, and a limit screw 16. The handle 1 is connected to the connecting rod 3 via the cylindrical pin A2. The handle 1 is also connected to the positioning plate 5 via the cylindrical head screw 4. A positioning block 6 is provided in the central groove of the positioning plate 5. The two sides of the central groove of the positioning plate 5 are respectively connected to the pressure plate 8 via the cylindrical pin B7. Each side of the positioning plate 5 has a through hole with a larger upper part and a smaller lower part. A pressure spring 9 is installed in the lower part of the larger hole, and a guide sleeve 10 is installed in the upper part of the larger hole. A pull rod A11 is installed in the left through hole. The lower part of the pull rod A11 passes through the positioning plate 5 and is connected to the left end of the connecting rod 3 through a cylindrical pin C12. The upper part of the pull rod A11 passes through the positioning plate 5 and is fixed by a washer 13 and a hexagonal nut 14. A pull rod B15 is installed in the right through hole. The lower part of the pull rod B15 passes through the positioning plate 5 and is connected to the right end of the connecting rod 3 through a cylindrical pin C12. The upper part of the pull rod B15 passes through the positioning plate 5 and is fixed by a limit screw 16.

[0032] The positioning disc 5 and positioning block 6 are the positioning parts of the fixture. To prevent wear on these parts from affecting the welding dimensions of the product, they are all made of Cr12MoV material with a HY surface hardening and a surface quenching temperature of 52-57. The remaining components, such as the pressure plate 8, guide sleeve 10, tie rod A11, tie rod B15, connecting rod 3, and handle 1, do not require high hardness and strength. For economic reasons, 45# steel with a HY surface hardening and a surface quenching temperature of 32-36 is sufficient. This ensures the fixture structure is stable, not easily oxidized, not easily deformed, and not easily worn.

[0033] The fixture is composed of a pressure plate 8, guide sleeve 10, pressure spring 9, pull rod A11, pull rod B15, positioning plate 5, connecting rod 3, handle 1, and positioning block 6. The positioning plate 5 and handle 1 are fastened together by two cylindrical head screws 4 to form the main body of the fixture. The rectangular inner cavity in the middle of the positioning plate 5 has a clearance fit with the outer shape of the positioning block 6. Both the positioning block 6 and the pressure plate 8 can be designed, selected, and replaced according to the dimensions of the product parts. This design greatly increases the versatility of the fixture.

[0034] The pressure plate 8, guide sleeve 10, pull rod A11, pull rod B15, and connecting rod 3 are combined to form the clamping mechanism of the fixture. The two pressure plates 8 are connected to the positioning plate 5 by pull rods A11 and B15 respectively. Two cylindrical pins B7 on the surface of the positioning plate 5 pass through the U-shaped long opening groove of the pressure plate 8, and together with pull rods A11 and B15, limit the sliding direction of the pressure plate 8. A guide sleeve 10 and a pressure spring 9 are installed between pull rods A11, B15, and the positioning plate 5. Tightening the hexagonal nut 14 presses the pressure plate 8 downwards while simultaneously pulling pull rod A11 upwards. Pull rod A11 drives the connecting rod 3 to pull pull rod B15 downwards, which in turn drives the other pressure plate 8 to press the component to be welded. When the hexagonal nut 14 is loosened, the pressure spring 9 pushes up the guide sleeve 10, which then pushes the pressure plate 8 upwards to release the welded product. This clamping method has the advantages of simple operation, good versatility, reliable clamping, and large force amplification ratio.

[0035] In the description of this invention, it should also be noted that the terms "left side," "right side," "upper part," "lower part," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed when in use. They are only used to facilitate the description of this invention and to simplify 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. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

Claims

1. A universal fixture for laser welding of contactors, characterized in that: It includes a handle (1), a cylindrical pin A (2), a connecting rod (3), a cylindrical head screw (4), a positioning plate (5), a positioning block (6), a cylindrical pin B (7), a pressure plate (8), a pressure spring (9), a guide sleeve (10), a pull rod A (11), a cylindrical pin C (12), a washer (13), a hexagonal nut (14), a pull rod B (15), and a limit screw (16); the handle (1) is connected to the connecting rod (3) via the cylindrical pin A (2); the handle (1) is also connected to the positioning plate (5) via the cylindrical head screw (4), and the positioning plate (5) has a positioning block (6) in its central groove; the two sides of the central groove of the positioning plate (5) are respectively connected to the pressure plate (8) via the cylindrical pin B (7); the positioning plate (5) There is a through hole with a larger upper part and a smaller lower part on each side. A pressure spring (9) is provided in the lower part of the larger hole, and a guide sleeve (10) is provided in the larger hole above the pressure spring (9). A pull rod A (11) is provided in the through hole on the left side. After the lower part of the pull rod A (11) passes through the positioning plate (5), it is connected to the left end of the connecting rod (3) through the cylindrical pin C (12). After the upper part of the pull rod A (11) passes through the positioning plate (5), it is fixed by the washer (13) and the hexagonal nut (14). A pull rod B (15) is provided in the through hole on the right side. After the lower part of the pull rod B (15) passes through the positioning plate (5), it is connected to the right end of the connecting rod (3) through the cylindrical pin C (12). After the upper part of the pull rod B (15) passes through the positioning plate (5), it is fixed by the limit screw (16).

2. The universal fixture for contactor laser welding according to claim 1, characterized in that: The positioning disk (5) and positioning block (6) are both made of Cr12MoV material, with a surface hardened by HY and surface quenched to 52-57.

3. The universal fixture for laser welding of contactors according to claim 1, characterized in that: The pressure plate (8), guide sleeve (10), pull rod A (11), pull rod B (15), connecting rod (3), and handle (1) are made of 45# steel with a surface hardening of HY and surface quenching of 32-36.

4. The universal fixture for contactor laser welding according to claim 1, characterized in that: The rectangular inner cavity in the middle of the positioning disk (5) is fitted with the outer shape of the positioning block (6) with clearance.

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