A welding aid and base therefor

Abstract

The utility model discloses a kind of welding auxiliary tool and pedestal thereof, including first plate body and second plate body, first plate body is perpendicular to flat wire stator axis arrangement, first plate body has through hole that is parallel to the axial penetration of flat wire stator and penetrates first plate body, limiting ring is fixedly connected in through hole inner wall, through hole inner diameter is greater than or equal to the outer diameter of flat wire stator, when first plate body is sleeved in flat wire stator end surface, flat wire stator end surface is contacted with limiting ring to make limiting ring constitute the limiting of first plate body in the axial direction of flat wire stator;Second plate body is detachably installed on limiting ring and covers part through hole in radial direction.The utility model utilizes second plate body to shield the area that flat wire stator is not welded, not cut off, also utilize cover to shield welding operation area and cut-off operation area, to prevent welding slag or shearing scrap to fall into flat wire stator and damage welding quality, prevent welding slag heat damage copper wire paint and affect the use efficiency of motor.

Description

Technical Field

[0001] This utility model relates to the field of welding tooling technology, and in particular to a welding auxiliary tooling and its base. Background Technology

[0002] The welding technology between flat wire stators and busbars is one of the core processes in the production of drive motors for new energy vehicles, and its quality directly affects the motor's performance, reliability, and lifespan. Its main purpose is to firmly, with low resistance, and reliably connect the ends of the flat wire stator windings to the corresponding terminals of the busbars. During the welding process, tooling is often used to clamp the parts to be welded to ensure precise positioning.

[0003] However, most existing welding fixture bases are half-enclosed and require clamping and adjustment after installation. Furthermore, the pins left are relatively short, which can easily lead to damage to the fixture due to heat during the welding process. Welding slag may fall into the previously welded pins or damage the copper wire coating, thereby affecting the efficiency of the motor. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model proposes a welding auxiliary tooling and its base.

[0005] This utility model proposes a welding auxiliary tooling base, including a first plate and a second plate. The first plate is arranged perpendicular to the axis of the flat wire stator and has a through hole parallel to the axis of the flat wire stator. A limit ring is fixedly connected to the inner wall of the through hole. The inner diameter of the through hole is greater than or equal to the outer diameter of the flat wire stator, and the inner diameter of the limit ring is smaller than the outer diameter of the flat wire stator. When the first plate is fitted onto the end face of the flat wire stator, the end face of the flat wire stator contacts the limit ring so that the limit ring constitutes a limit on the first plate in the axial direction of the flat wire stator. The second plate is detachably installed on the limit ring and covers part of the through hole in the radial direction.

[0006] Preferably, the second plate has a notch that extends through the second plate parallel to the axial direction of the flat wire stator. Specifically, the second plate covers part of the through hole in the radial direction: the notch occupies a part of the through hole in the circumferential direction so that the second plate covers the remaining part of the through hole.

[0007] Preferably, the second plate has a vertical baffle and a horizontal baffle. The vertical baffle is detachably connected to the limiting ring, and the horizontal baffle is fixedly connected to the vertical baffle and extends horizontally from the vertical baffle toward the center of the through hole. A notch is arranged on the horizontal baffle. The vertical baffle is a non-complete ring structure, and the projected area of ​​the horizontal baffle is smaller than the area of ​​the through hole.

[0008] Preferably, it also has a cover plate, which is detachably mounted on the first plate to cover a portion of the area of ​​the through hole that the notch occupies in the circumferential direction.

[0009] Preferably, it also has a positioning pin, which is fixedly connected to the bottom of the first plate, and the end of the positioning pin is adapted to the gap of the flat wire stator core.

[0010] Preferably, it also includes a guide bearing and a guide mounting block, the guide bearing being movably connected to the end of the guide mounting block away from the first plate, the guide mounting block being movably connected to the first plate, and the outer wall of the guide bearing contacting the outer wall of the flat wire stator.

[0011] Preferably, the cover plate has a through hole.

[0012] Preferably, the first plate has a mounting groove for the guide mounting block to move within a preset range, and the mounting groove is connected to the through hole.

[0013] Preferably, at least two guide bearings are provided and are evenly distributed circumferentially around the through hole.

[0014] This utility model also provides a welding auxiliary fixture, which has the aforementioned welding auxiliary fixture base.

[0015] In this invention, the second plate can shield the areas of the flat wire stator that are not welded or cut, and the cover plate can also shield the welding and cutting operation areas to prevent weld slag or shearing debris from falling into the flat wire stator and damaging the welding quality. It also prevents the heat from the weld slag from damaging the copper wire coating and affecting the motor's efficiency. Furthermore, when matching with the flat wire stator, a guide bearing is used for positioning with appropriate allowance, facilitating installation and ensuring consistency of the reference. A positioning pin for the changeover tool is added, which fits into the gap of the flat wire stator core for better positioning. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the base of the welding auxiliary tooling proposed in this utility model; Figure 2 This is a schematic diagram of the positioning pin and guide bearing of the base of the welding auxiliary tooling proposed in this utility model; Figure 3 This is a schematic diagram of one type of cover plate for the base of the welding auxiliary tooling proposed in this utility model. Figure 4 This is a schematic diagram of a second type of cover plate for the base of the welding auxiliary tooling proposed in this utility model. Figure 5 This is a schematic diagram of the present invention installed on a flat wire stator. Detailed Implementation

[0017] This utility model proposes a welding auxiliary tooling base, which can be used in... Figure 5The welding auxiliary tooling shown in the diagram shields and protects the flat wire stator 2 when the first type of pin wire on the welding flat wire stator 2 and the second type of pin wire on the busbar 3 form a pin pair.

[0018] Specifically, the structure of base 1 is as follows: Figures 1-4 The device includes a first plate 11 and a second plate 12. The first plate 11 is arranged perpendicular to the axis of the flat wire stator 2. The first plate 11 has a through hole 111 that is parallel to the axial direction of the flat wire stator 2 and passes through the first plate 11. A limiting ring 112 is fixedly connected to the inner wall of the through hole 111. The inner diameter of the through hole 111 is greater than or equal to the outer diameter of the flat wire stator 2, and the inner diameter of the limiting ring 112 is smaller than the outer diameter of the flat wire stator 2. When the first plate 11 is fitted onto the end face of the flat wire stator 2, the end face of the flat wire stator 2 contacts the limiting ring 112 so that the limiting ring 112 constitutes a limiting position of the first plate 11 in the axial direction of the flat wire stator 2. The second plate 12 has a notch 1221 that is parallel to the axial direction of the flat wire stator 2 and passes through the second plate 12. The notch 1221 occupies a part of the area of ​​the through hole 111 in the circumferential direction so that the second plate 12 covers the remaining part of the area of ​​the through hole 111.

[0019] During installation, first place the first plate 11 on the flat wire stator 2, align the axis of the through hole 111 on the first plate 11 with the axis of the flat wire stator 2, and align the notch 1221 on the second plate 12 with the area of ​​the first type of pin wire to be welded on the flat wire stator 2. The second plate 12 consists of a vertical baffle 121 and a horizontal baffle 122. The vertical baffle 121 is detachably connected to the limiting ring 112 to block the welding slag from the side. The horizontal baffle 122 is fixedly connected to the vertical baffle 121 and extends horizontally from the vertical baffle 121 towards the center of the through hole 111. The notch 1221 is arranged on the horizontal baffle 122. The vertical baffle 121 is a non-complete ring structure, and the projected area of ​​the horizontal baffle 122 is smaller than the area of ​​the through hole 111. The vertical baffle 121 and the horizontal baffle 122 can shield the area to be welded on the flat wire stator 2 to prevent welding slag from falling into the flat wire stator 2 and affecting the welding quality.

[0020] During the installation of the base, it is also necessary to... Figure 2 The positioning pin 13 at the bottom of the first plate 11 is inserted into the gap of the core of the flat wire stator 2 to limit the degree of freedom of the flat wire stator 2. At the same time, the guide bearing 14 at the bottom of the first plate 11 contacts the outer wall of the flat wire stator 2 to achieve positioning. The guide bearing 14 is installed at the bottom of the base through the guide mounting block 141. At least two guide bearings 14 are provided and are evenly distributed around the through hole 111. The bottom of the first plate 11 also has a mounting groove 142 for the guide mounting block 141 to move within a preset range. The setting of this movable margin makes this utility model applicable to the welding of flat wire stators 2 of different sizes.

[0021] During the welding process, in order to prevent welding slag from falling into the flat wire stator 2 through the notch 1221 on the second plate 12 as much as possible, a cover plate 15 is also provided on the base. The cover plate 15 is detachably installed on the second plate 12 corresponding to the notch 1221 to cover part of the area occupied by the notch 1221 in the circumferential direction of the through hole 111. The cover plate 15 has through holes 151 for the pins to be welded to pass through, so that the cover plate 15 can shield the welding slag while satisfying the welding, thereby increasing the success rate of welding the flat wire stator 2.

[0022] Because the first and second type pins need to be cut before welding to ensure their length meets welding requirements, cover plate 15 is divided into two types based on different operating procedures: cut cover plate and welded cover plate. Figure 3 and Figure 4 As shown, the difference between the shearing cover plate and the welding cover plate is that the cross-sectional thickness of the area where the through hole 151 is located on the shearing cover plate is greater than that on the welding cover plate. This design ensures that the plane of the shearing cover plate is flush with the first and second type pin wires after shearing, thus better protecting the pin wires and ensuring that the pin wires are not deformed by stress during shearing. Furthermore, the size of the through hole 151 is smaller to ensure that the pin wires are not deformed as much as possible, and the generated waste material will not fall into the lower part. During the welding process, considering that welding will reduce the pin wire length, a groove is dug downwards corresponding to the area where the through hole 151 is located on the welding cover plate (e.g., ...). Figure 4 Furthermore, the pin end may melt and enlarge during the welding process. If the original hole size is maintained, it may be difficult to remove the welding processing cover plate. Therefore, this utility model ensures that the through hole 151 on the welding processing cover plate can be easily removed after welding by appropriately increasing the hole size.

[0023] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A welding auxiliary tooling base, characterized in that, The first plate (11) and the second plate (12) are included. The first plate (11) is arranged perpendicular to the axis of the flat wire stator (2). The first plate (11) has a through hole (111) that is parallel to the axis of the flat wire stator (2) and passes through the first plate (11). A limiting ring (112) is fixedly connected to the inner wall of the through hole (111). The inner diameter of the through hole (111) is greater than or equal to the outer diameter of the flat wire stator (2). The inner diameter of the limiting ring (112) is less than the outer diameter of the flat wire stator (2). When the first plate (11) is fitted on the end face of the flat wire stator (2), the end face of the flat wire stator (2) contacts the limiting ring (112) so that the limiting ring (112) constitutes the limiting of the first plate (11) in the axial direction of the flat wire stator (2). The second plate (12) is detachably installed on the limiting ring (112) and covers part of the through hole (111) in the radial direction.

2. The welding auxiliary tooling base according to claim 1, characterized in that, The second plate (12) has a notch (1221) that is parallel to the axial direction of the flat wire stator (2) and passes through the second plate (12). Specifically, the second plate (12) covers part of the through hole (111) in the radial direction. The notch (1221) occupies a part of the area of ​​the through hole (111) in the circumferential direction so that the second plate (12) covers the remaining area of ​​the through hole (111).

3. The welding auxiliary tooling base according to claim 2, characterized in that, The second plate (12) has a vertical baffle (121) and a horizontal baffle (122). The vertical baffle (121) is detachably connected to the limiting ring. The horizontal baffle (122) is fixedly connected to the vertical baffle (121) and extends horizontally from the vertical baffle (121) toward the center of the through hole (111). The notch (1221) is arranged on the horizontal baffle (122). The vertical baffle (121) is a non-complete ring structure, and the projected area of ​​the horizontal baffle (122) is smaller than the area of ​​the through hole (111).

4. The welding auxiliary tooling base according to claim 2, characterized in that, It also has a cover plate (15) that is detachably mounted on the second plate (12) corresponding to the notch (1221) to cover a portion of the area of ​​the through hole (111) in the circumferential direction of the notch (1221).

5. The welding auxiliary tooling base according to claim 1, characterized in that, It also has a positioning pin (13), which is fixedly connected to the bottom of the first plate (11), and the end of the positioning pin (13) is adapted to the gap of the iron core of the flat wire stator (2).

6. The welding auxiliary tooling base according to claim 1, characterized in that, It also has a guide bearing (14) and a guide mounting block (141). The guide bearing (14) is movably connected to one end of the guide mounting block (141) away from the first plate (11). The guide mounting block (141) is movably connected to the first plate (11). The outer wall of the guide bearing (14) is in contact with the outer wall of the flat wire stator (2).

7. The welding auxiliary tooling base according to claim 6, characterized in that, The first plate (11) has an installation groove (142) for the guide mounting block (141) to move within a preset range, and the installation groove (142) is connected to the through hole (111).

8. The welding auxiliary tooling base according to claim 6, characterized in that, At least two guide bearings (14) are provided and are evenly distributed circumferentially around the through hole (111).

9. The welding auxiliary tooling base according to claim 4, characterized in that, The cover plate (15) has a through hole (151).

10. A welding auxiliary tooling, characterized in that, It has a welding auxiliary tooling base as described in any one of claims 1-9.

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