Flat wire stator cutting head laser welding tool

Abstract

The utility model provides a flat wire stator end cutting laser welding tool which comprises a stator base and a flat wire fixing frame, the stator base is used for placing a flat wire stator, and the upper surface of the stator base is provided with a first groove used for containing a wire clamping part; the flat wire fixing frame is provided with a plurality of sets of wire penetrating holes distributed in the circumferential direction, the number of the wire penetrating holes in each set is multiple, and the multiple wire penetrating holes are distributed in the radial direction. Through the arrangement of the flat wire fixing frame, after the welding parts of the two flat wires to be welded penetrate through the same threading hole, the threading hole can position the two flat wires to be welded, so that the welding quality is improved, the flat wire fixing frame can block laser during welding, and the welding quality is improved. The laser is prevented from strafing to the stator core to damage an insulating layer of the stator core; when the flat wire stator is placed on the stator seat, the first groove can accommodate the card issuing part of the flat wire, thereby providing protection for the card issuing part.

Description

Technical Field

[0001] This utility model relates to the field of flat wire stator welding technology, and in particular to a laser welding fixture for flat wire stator cutting heads. Background Technology

[0002] Hairpin permanent magnet synchronous motors are gradually being used on a large scale in the domestic drive motor market. Compared with traditional wound motors, due to the flat characteristics of hairpin copper wire, the motor is smaller and has higher power at the same power, which is the development direction of the next generation of new energy drive motors. For example, the flat wire motor and stator structure disclosed in patent CN218301062U include a stator core and a flat wire winding. The flat wire winding includes multiple layers of flat wire conductors inserted into the stator core. One end of each layer of flat wire conductor is a hairpin end and the other end is a welding end.

[0003] In the production of hairpin motors, the ends of the copper wires in the stator of the hairpin motor need to be welded. Before welding, the wires must undergo twisting and flattening processes. To ensure welding quality, the welding ends of the copper wires need to be fixed. Patent CN116787052A discloses a clamping fixture and a welding system for welding the stator of a hairpin motor. The clamping fixture in this solution can fix the welding ends of the copper wires in the stator of the hairpin motor. However, when welding the welding ends of the copper wires, it is also necessary to consider protecting the hairpin ends of the copper wires. Utility Model Content

[0004] Based on the problems existing in the prior art, this utility model aims to solve the technical problem that the clamping fixture for welding the stator of the flat wire motor can only fix the welding end of the copper wire, but cannot protect the hairpin end of the copper wire.

[0005] This utility model provides a laser welding fixture for flat wire stator cutting heads. The flat wire stator includes a stator core and a flat wire winding. The flat wire winding includes multiple flat wires, and each flat wire includes a hairpin section, a threading section, a twisting head, and a welding section. The laser welding fixture for flat wire stator cutting heads includes:

[0006] A stator base for placing the flat wire stator, wherein the upper surface of the stator base is provided with a first groove for accommodating the hairpin portion;

[0007] A flat wire fixing bracket has multiple sets of wire-passing holes distributed circumferentially, each set having multiple wire-passing holes, and the multiple wire-passing holes are distributed radially.

[0008] According to one embodiment of the present invention, the lower surface of the flat wire fixing bracket is provided with a second groove for accommodating the twisted head.

[0009] According to one embodiment of the present invention, a third groove is provided on the lower end face of the second groove, and the shape of the third groove matches the shape of the end face of the stator core.

[0010] According to one embodiment of the present invention, the flat wire fixing frame is a ring-shaped fixing frame.

[0011] According to one embodiment of the present invention, the laser welding fixture for flat wire stator cutting head further includes a positioning block fixed on the stator base, the side wall of the stator core has a groove, and the positioning block protrudes upward from the upper surface of the stator base and is embedded in the groove.

[0012] According to one embodiment of the present invention, the outer diameter of the stator base is equal to the outer diameter of the stator core, a keyway is provided on the side wall of the stator base, the bottom end of the positioning block is detachably fixed in the keyway, and the top end protrudes from the upper surface of the stator base.

[0013] According to one embodiment of the present invention, the laser welding fixture for flat wire stator cutting head further includes a base, the bottom surface area of ​​the base is larger than the bottom surface area of ​​the stator seat, and the stator seat is detachably fixed on the base.

[0014] The laser welding fixture for flat wire stator cutting head provided by this utility model has the following beneficial effects:

[0015] (1) By setting the flat wire fixing frame, after the welding parts of the two flat wires to be welded pass through the same wire hole, the wire hole can position the two flat wires to be welded, thereby improving the welding quality. The flat wire fixing frame can also block the laser during welding to prevent the laser from sweeping to the stator core and damaging the insulation layer of the stator core.

[0016] (2) When the flat wire stator is placed on the stator base, the first groove can accommodate the hairpin portion of the flat wire, thereby providing protection for the hairpin portion. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the flat wire stator in an embodiment of this utility model;

[0019] Figure 2This is a schematic diagram of the flat wire structure in an embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the stator base in an embodiment of this utility model;

[0021] Figure 4 This is a schematic diagram of the flat wire fixing frame in an embodiment of this utility model;

[0022] Figure 5 This is a schematic diagram of the working state of a laser welding fixture for a flat wire stator cutter provided in an embodiment of this utility model;

[0023] Figure 6 This is a schematic cross-sectional view of the working state of a laser welding fixture for a flat wire stator cutter provided in an embodiment of this utility model;

[0024] Reference numerals: 1000, flat wire stator; 100, stator core; 101, slot; 200, flat wire winding; 20, flat wire; 201, hairpin part; 202, wire threading part; 203, twist head; 204, welding part; 1, stator base; 11, first groove; 12, keyway; 2, flat wire fixing bracket; 21, wire threading hole; 22, second groove; 23, third groove; 3, positioning block; 4, base. Detailed Implementation

[0025] The following description of the embodiments is with reference to the accompanying illustrations, which illustrate specific embodiments in which the present invention can be implemented.

[0026] This utility model provides a laser welding fixture for cutting flat wire stators, wherein the structure of the flat wire stator 1000 is as follows: Figure 1 As shown, it includes a stator core 100 and a flat wire winding 200, wherein the flat wire winding 200 includes multiple flat wires 20, and the structure of the flat wires 20 is as follows. Figure 2 As shown, it includes a hairpin part 201, a wire threading part 202, a twisting head 203, and a welding part 204; the flat wire stator cutting laser welding fixture includes a stator base 1 and a flat wire fixing frame 2, wherein the structure of the stator base 1 is as follows Figure 3 As shown, the stator base 1 is used to place the flat wire stator 1000, and the upper surface of the stator base 1 has a first groove 11 for accommodating the hairpin part 201; the structure of the flat wire fixing bracket 2 is as follows. Figure 4 As shown, the flat wire fixing frame 2 has multiple sets of wire-passing holes 21 distributed circumferentially, and each set has multiple wire-passing holes 21, which are distributed radially; preferably, the flat wire fixing frame 2 is an annular fixing frame.

[0027] With the above design, after the welding portions 204 of the two flat wires 20 to be welded pass through the same wire hole 21, the wire hole 21 can position the two flat wires 20 to be welded, thereby improving the welding quality. The flat wire fixing bracket 2 can also block the laser during welding to prevent the laser from sweeping onto the stator core 100 and damaging the insulation layer of the stator core 100. In addition, when the flat wire stator 1000 is placed on the stator base 1, the first groove 11 can accommodate the hairpin portion 201 of the flat wire 20, thereby providing protection for the hairpin portion 201.

[0028] Please continue to refer to Figure 4 Furthermore, in order to enable the flat wire fixing bracket 2 to be placed directly on the upper end face of the stator core 100 without having to set up an additional support structure for the flat wire fixing bracket 2, a second groove 22 for accommodating the twist head 203 is provided on the lower surface of the flat wire fixing bracket 2.

[0029] Furthermore, to improve the stability of the flat wire fixing bracket 2 when placed on the upper surface of the stator core 100, a third groove 23 is formed on the lower surface of the second groove 22. The shape of the third groove 23 matches the shape of the end face of the stator core 100. When the flat wire fixing bracket 2 is placed on the upper surface of the stator core 100, the upper surface of the stator core 100 can be embedded in the third groove 23, thereby improving the stability of the flat wire fixing bracket 2 and, to a certain extent, improving the placement accuracy of the flat wire fixing bracket 2.

[0030] Please refer to Figure 5 and Figure 6 According to one embodiment of the present invention, in order to improve the stability of the stator core 100 placed on the stator base 1, the flat wire stator cutting head laser welding fixture further includes a positioning block 3 fixed on the stator base 1. The side wall of the stator core 100 has a slot 101, and the positioning block 3 protrudes upward from the upper surface of the stator base 1 and is embedded in the slot 101.

[0031] It is understood that the positioning block 3 is embedded in the slot 101 and can position the flat wire stator 1000 placed on the upper surface of the stator base 1 to prevent the flat wire stator 1000 from shifting during welding and affecting the welding quality.

[0032] Specifically, the outer diameter of the stator base 1 is equal to the outer diameter of the stator core 100. A keyway 12 is provided on the side wall of the stator base 1. The bottom end of the positioning block 3 is detachably fixed in the keyway 12, and the top end protrudes from the upper surface of the stator base 1.

[0033] According to one embodiment of the present invention, the flat wire stator cutting head laser welding fixture further includes a base 4, the bottom surface area of ​​the base 4 is larger than the bottom surface area of ​​the stator seat 1, and the stator seat 1 is detachably fixed on the base 4.

[0034] To facilitate understanding of this solution, the following is combined with... Figures 1-6 The working principle of this utility model will be described in detail below:

[0035] Step 1: Place the flat wire stator 1000 to be welded on the upper surface of the stator base 1, and make sure that the slot 101 of the stator core 100 is aligned with the positioning block 3 before inserting the positioning block 3 into the slot 101.

[0036] Step 2: Move the flat wire fixing bracket 2 above the flat wire stator 1000, and align the wire through hole 21 with the welding part 204 of the two flat wires 20 to be welded. Then lower the height of the flat wire fixing bracket 2 so that the welding part 204 of the two flat wires 20 to be welded passes through the same wire through hole 21 until the flat wire fixing bracket 2 is placed on the upper end face of the stator core 100. At this time, the upper end of the stator core 100 is embedded in the third groove 23.

[0037] Step 3: After welding is completed, remove the flat wire fixing frame 2 and the flat wire stator 1000 in sequence.

[0038] In summary, in the laser welding fixture for flat wire stator cutting provided by this utility model, the flat wire fixing frame 2 can not only position the flat wire 20 using the wire hole 21, but also block the laser during welding to prevent the laser from sweeping onto the stator core 100 and damaging the insulation layer of the stator core 100; when the flat wire stator 1000 is placed on the stator base 1, the first groove 11 can accommodate the hairpin portion 201 of the flat wire 20, thereby providing protection for the hairpin portion 201.

[0039] It should be noted that although the present invention has been disclosed above with specific embodiments, the above embodiments are not intended to limit the present invention. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be determined by the scope defined in the claims.

Claims

1. A laser welding fixture for cutting flat wire stators, wherein the flat wire stator (1000) comprises a stator core (100) and a flat wire winding (200), the flat wire winding (200) comprising multiple flat wires (20), each flat wire (20) comprising a hairpin portion (201), a wire threading portion (202), a twisting head (203), and a welding portion (204); characterized in that, include: A stator base (1) is used to place the flat wire stator (1000), and the upper surface of the stator base (1) is provided with a first groove (11) for accommodating the hairpin part (201); The flat wire fixing bracket (2) has multiple sets of wire holes (21) distributed circumferentially, each set having multiple wire holes (21) and the multiple wire holes (21) being distributed radially.

2. The laser welding fixture for flat wire stator cutting head according to claim 1, characterized in that, The lower surface of the flat wire fixing bracket (2) is provided with a second groove (22) for accommodating the twist head (203).

3. The laser welding fixture for flat wire stator cutting head according to claim 2, characterized in that, The lower end face of the second groove (22) is provided with a third groove (23), the shape of which matches the shape of the end face of the stator core (100).

4. A laser welding fixture for flat wire stator cutting heads according to any one of claims 1 to 3, characterized in that, The flat wire fixing frame (2) is a ring-shaped fixing frame.

5. The laser welding fixture for flat wire stator cutting head according to claim 1, characterized in that, It also includes a positioning block (3) fixed on the stator base (1), the side wall of the stator core (100) has a slot (101), and the positioning block (3) protrudes upward from the upper surface of the stator base (1) and is embedded in the slot (101).

6. The laser welding fixture for flat wire stator cutting head according to claim 5, characterized in that, The outer diameter of the stator base (1) is equal to the outer diameter of the stator core (100). A keyway (12) is provided on the side wall of the stator base (1). The bottom end of the positioning block (3) is detachably fixed in the keyway (12), and the top end protrudes from the upper surface of the stator base (1).

7. The laser welding fixture for flat wire stator cutting head according to claim 1, characterized in that, It also includes a base (4), the bottom surface area of ​​which is larger than the bottom surface area of ​​the stator seat (1), and the stator seat (1) is detachably fixed on the base (4).

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