Flattening and dust removing device for end part of motor stator winding

By designing a motor stator winding end cutting and dust removal device including blowing, vacuuming and milling equipment, the problems of roughness of the surface of the line foot and metal dust pollution after the cut are solved, and efficient laser welding and product cleanliness are achieved.

CN222902721UActive Publication Date: 2025-05-27HUAYU AUTOMOTIVE ELECTRIC SYST (SHANGHAI) CO LTD
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Patent Information

Application Number
CN202421960259.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-08-14
Publication Date
2025-05-27
Estimated Expiration
2034-08-14

AI Technical Summary

Technical Problem

In the prior art, rough fractures are easily found after the ends of the motor stator winding are cut flat, which affects the accuracy of visual identification of laser welding. At the same time, a large amount of metal dust is generated during the milling cutter processing, resulting in unqualified stator cleanliness.

Method used

A motor stator winding end cutting and dust removal device is designed, including a blowing device, a vacuum cleaner device and a milling cutter device. The metal dust is blown away by a special wind knife plate and a vacuum cleaner is used to collect the dust to ensure that the surface of the line foot after cutting is smooth and burrs are free of.

Benefits of technology

The surface of the line foot after cutting is smooth and burr-free, which improves the visual recognition accuracy and success rate of laser welding. The pass rate of welding can reach more than 99%, and at the same time, it effectively avoids product quality problems caused by metal dust.

✦ Generated by Eureka AI based on patent content.

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Patent Text Reader

Abstract

A motor stator winding end cutting and dust removing device comprises an air blowing device, a dust suction device and milling cutter equipment, the air blowing device comprises an air inlet disc and an air cutter disc, at least two air inlets are formed in the outer side of the air inlet disc, at least two air outlets are formed in the inner side of the air inlet disc, and at least two air inlet grooves are formed in the outer side of the air cutter disc; at least two air outlet grooves are formed in the inner side of the air knife disc, and the air inlet, the air outlet, the air inlet grooves and the air outlet grooves are sequentially communicated. According to the utility model, the end part of the winding is flatly cut by using the milling cutter, so that the surface of the flatly-cut wire leg is smooth without burr deformation. According to the utility model, the metal dust on the surface of the wire leg is blown away in time according to the specially-made air knife disc, and the scattered metal dust is collected through the dust collection device arranged at the central position of the stator, so that the product quality problem caused by the fact that the metal dust falls into a stator winding is effectively avoided.
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Description

Technical Field

[0001] The utility model relates to the field of machinery, in particular to stator processing technology, and especially to a device for trimming and dust removing the end part of a motor stator winding. Background Art

[0002] After the end part of the flat wire automotive drive motor stator winding is welded, it needs to be trimmed. In the prior art, the trimming method of the winding end part is mainly realized by two methods: radial single-slot cutting and circumferential ring cutting. However, limited by the change of the hardness of the copper wire itself and the tool wear, the cut surface of the copper wire is prone to rough fractures after trimming. Especially when the hardness of the copper wire is relatively low, the copper wire is deformed and bent under force, which cannot meet the process requirements of the smooth and burr-free cut surface of the wire foot for the subsequent laser welding, affecting the accuracy of the welding visual recognition and causing poor problems such as virtual soldering and welding deviation of the solder joints. In addition, although a milling cutter can be used to trim the end part of the winding, the milling cutter process is more applied in the machining industry. Its advantage is that the surface of the sample is smooth and burr-free after milling. The disadvantage is that a large amount of metal dust is easily generated during the working process. If the milling cutter process is directly applied to the trimming of the stator winding, a large amount of metal dust is likely to cause the unqualified cleanliness of the stator, resulting in product scrapping. Summary of the Invention

[0003] The purpose of the utility model is to provide a device for trimming and dust removing the end part of a motor stator winding, and the device for trimming and dust removing the end part of a motor stator winding is to solve the technical problems in the prior art that the wire foot cannot meet the process requirements of smooth and burr-free after trimming, and a large amount of metal dust during milling is likely to cause the unqualified cleanliness of the stator.

[0004] A device for trimming and dust removing the end part of a motor stator winding of the utility model includes a blowing device, a dust suction device and a milling cutter device. The blowing device includes an air inlet disc and an air knife disc. Both the air inlet disc and the air knife disc are annular. At least two air inlets are arranged at intervals along the circumferential direction on the outer side of the air inlet disc, and at least two air outlets are arranged at intervals along the circumferential direction on the inner side of the air inlet disc. The air knife disc is coaxially arranged in the air inlet disc. At least two air inlet grooves are arranged at intervals along the circumferential direction on the outer side of the air knife disc, and at least two air outlet grooves are arranged at intervals along the circumferential direction on the inner side of the air knife disc. The air inlets, air outlets, air inlet grooves and air outlet grooves are communicated in sequence. The dust suction device includes a dust suction disc and a suction air pipe. The dust suction disc is annular and is coaxially arranged in the air knife disc. At least two channels are arranged at intervals along the circumferential direction on the outer side of the dust suction disc. The suction air pipe is connected to the lower side of the dust suction disc, and the channels are communicated with the suction air pipe. The milling cutter device is located below the air knife disc and outside the suction air pipe.

[0005] Further, the air inlet disc and the air knife disc are integrally formed.

[0006] Further, the number of the air inlets is four, and they are evenly arranged along the circumferential direction.

[0007] Further, the width of the air outlet groove is 0.5 - 1.5 mm, and the inner diameter of the air knife disc is 200 - 600 mm.

[0008] A dust removal device for trimming the end of a motor stator winding, characterized in that: the inner diameter of the air inlet disc is equal to the outer diameter of the air knife disc or the inner diameter of the air inlet disc is 0.5 - 1 mm larger than the outer diameter of the air knife disc.

[0009] Further, a sealing strip is provided at the connection between the air knife disc and the air inlet disc.

[0010] Further, the milling cutter device includes a milling cutter disc and a milling cutter disc movement connecting rod connected to the milling cutter disc.

[0011] Further, the thickness of the milling cutter disc is 2 - 5 mm, and the diameter is 30 - 200 mm.

[0012] Further, the milling cutter disc movement connecting rod has a length adjustable mechanism, and the adjustable range of the length of the length adjustable mechanism is 30 - 500 mm.

[0013] Compared with the prior art, the effects of the present utility model are positive and obvious. The present utility model uses a milling cutter to trim the end of the winding, solves the problem that the existing trimming method is easy to cause the surface of the wire feet to be rough and deformed, thus affecting the visual recognition of laser welding, ensures that the surface of the wire feet is smooth, burr-free and deformed after trimming, helps to achieve good laser welding effects, the accuracy rate and success rate of welding visual recognition can reach 100%, and at the same time, the first-pass welding qualification rate can be increased to more than 99%. The present utility model also solves the problem that metal dust cannot be effectively cleaned and collected during the processing of traditional milling cutters. By means of a specially designed air knife disc, the metal dust on the surface of the wire feet is timely blown away, and the scattered metal dust is collected by a dust suction device placed at the center of the stator, effectively avoiding product quality problems caused by metal dust falling into the stator winding. Description of the Drawings

[0014] Figure 1 Figure 1 is a schematic diagram of the first use state of a dust removal device for trimming the end of a motor stator winding of the present utility model.

[0015] Figure 2 Figure 2 is a schematic diagram of the second use state of a dust removal device for trimming the end of a motor stator winding of the present utility model.

[0016] Figure 3 Figure 3 is a schematic diagram of the air blowing device in a dust removal device for trimming the end of a motor stator winding of the present utility model.

[0017] Figure 4 Figure 4 is a schematic diagram of the air inlet disc in a dust removal device for trimming the end of a motor stator winding of the present utility model.

[0018] Figure 5 Schematic diagram of the air knife disc in the device for trimming and dust removal at the end of the motor stator winding of the present utility model.

[0019] Figure 6 Schematic diagram of the dust suction device in the device for trimming and dust removal at the end of the motor stator winding of the present utility model.

[0020] Figure 7 Schematic diagram of the milling cutter device in the device for trimming and dust removal at the end of the motor stator winding of the present utility model.

[0021] Figure 8 Schematic diagram of the working state of the milling cutter device in the device for trimming and dust removal at the end of the motor stator winding of the present utility model. Specific embodiments

[0022] The present utility model will be further described below in conjunction with embodiments. However, the present utility model is not limited to these embodiments. Any similar structures and their similar variations using the present utility model shall fall within the protection scope of the present utility model. The use of directions such as up, down, front, back, left, and right in the present utility model is only for the convenience of clear description and does not limit the technical solution of the present utility model.

[0023] As Figures 1-8 shown, a device for trimming and dust removal at the end of the motor stator winding of the present utility model includes a blowing device, a dust suction device, and a milling cutter device 10. The blowing device includes an air inlet disc 1 and an air knife disc 2. Both the air inlet disc 1 and the air knife disc 2 are annular. At least two air inlets 3 are arranged at intervals along the circumferential direction on the outer side of the air inlet disc 1, and at least two air outlets 4 are arranged at intervals along the circumferential direction on the inner side of the air inlet disc 1. The air knife disc 2 is coaxially arranged in the air inlet disc 1. At least two air inlet grooves 5 are arranged at intervals along the circumferential direction on the outer side of the air knife disc 2, and at least two air outlet grooves 6 are arranged at intervals along the circumferential direction on the inner side of the air knife disc 2. The air inlets 3, air outlets 4, air inlet grooves 5, and air outlet grooves 6 are sequentially communicated. The dust suction device includes a dust suction disc 7 and a suction duct 8. The dust suction disc 7 is annular and is coaxially arranged in the air knife disc 2. At least two channels 9 are arranged at intervals along the circumferential direction on the outer side of the dust suction disc 7. The suction duct 8 is connected to the lower side of the dust suction disc 7, and the channels 9 are communicated with the suction duct 8. The milling cutter device 10 is located below the air knife disc 2 and outside the suction duct 8.

[0024] Furthermore, the air inlet disc 1 and the air knife disc 2 are integrated.

[0025] Furthermore, the number of the air inlets 3 is four and they are evenly arranged along the circumferential direction.

[0026] Further, the width of the air outlet groove 6 is 0.5 - 1.5 mm, the inner diameter of the air knife disc 2 is 200 - 600 mm, which is 50 - 80 mm larger than the outer diameter of the winding, so as to meet the stator windings of different outer diameter sizes.

[0027] Further, the inner diameter of the air inlet disc 1 is equal to the outer diameter of the air knife disc 2 or the inner diameter of the air inlet disc 1 is 0.5 - 1 mm larger than the outer diameter of the air knife disc 2.

[0028] Further, a sealing strip is provided at the connection between the air knife disc and the air inlet disc. This ensures the sealing of the assembly and also makes it more convenient to replace the air knife disc 2 of different sizes for products of different models.

[0029] Further, the milling cutter device 10 includes a milling cutter disc 11 and a milling cutter disc moving link 12 connected to the milling cutter disc 11.

[0030] Further, the thickness of the milling cutter disc 11 is 2 - 5 mm and the diameter is 30 - 200 mm to meet the milling requirements of different products.

[0031] Further, the milling cutter disc moving link 12 has a length adjustable mechanism, and the adjustable range of the length of the length adjustable mechanism is 30 - 500 mm. The milling cutter disc moving link 12 can be freely adjusted in length according to different product types.

[0032] Specifically, to better adapt to different stator winding sizes and reserve sufficient working space for the milling cutter, the outer diameter of the welding fixture disc 13 is 30 - 80 mm larger than the inner diameter of the air knife disc 2.

[0033] Specifically, the milling cutter device 10, the milling cutter disc 11, the milling cutter disc moving link 12, the sealing strip, the length adjustable mechanism, etc. in this embodiment all adopt well-known solutions in the prior art, which are already understood by those skilled in the art and will not be elaborated here.

[0034] The working principle of this embodiment:

[0035] 1. Connect the air inlet 3 to an external air supply device, and connect the bottom of the air suction pipe 8 to an external dust suction device. Use a manipulator to drive the stator and its welding fixture disc 13 to be placed upside down at the designated position of the device. The welding fixture disc 13 is located above the air knife disc 2 (the assembly gap between the welding fixture disc 13 and the air knife disc 2 is controlled by the servo mechanism of the manipulator to be ≤ 1 mm). The dust suction disc 7 is closely attached to the lower surface of the welding fixture disc 13. The windings of the stator are distributed on the outer periphery of the dust suction disc 7, and the air knife disc 2 is located on the outer periphery of the windings;

[0036] 2. Start the air supply device and the dust suction device:

[0037] 1) External compressed air is sent into the intake disk 1 from four air inlets 3, then enters the annular distributed intake slots 5 of the air knife disk 2 through the annular distributed air outlets 4, and finally, exits through the annular distributed air outlet slots 6 to blow away the metal dust on the surface of the wire feet during the milling process;

[0038] 2) The dust suction device strongly sucks the metal dust scattered on the surface of the copper wire through the suction pipe 8 and the dust suction disk 7, and collects it centrally through the channel 9 and the suction pipe 8, ensuring that there is no foreign matter sticking to the surface of the wire feet after milling.

[0039] 3. The milling cutter runs to the area of the stator winding to be milled and works, milling 1 - 6 slots at a time, and repeating the movement until all the wire feet are milled flat;

[0040] 4. After all the wire feet are milled flat, the milling cutter returns to the origin, and then the manipulator drives the stator and its welding fixture disk 13 to rise and separate;

[0041] 5. The product is replaced through the mechanical gripper;

[0042] 6. Repeat the actions of the above steps 1 - 5 to complete the batch production of the product.

[0043] The utility model synchronously realizes three functions of milling cutter cutting, air knife blowing, and dust suction through an integral tooling, designs a special milling cutter to mill the wire feet according to the type of stator winding, and at the same time cleans and collects the metal dust during the milling process through the blowing device and the dust suction device.

[0044] Advantages of the utility model:

[0045] 1. The utility model uses a milling cutter to cut the end of the winding flat, solves the problem that the existing cutting method is easy to cause the surface of the wire feet to be rough and deformed, thus affecting the visual recognition of laser welding, ensures that the surface of the wire feet is smooth, burr - free and deformed after cutting, helps to achieve a good laser welding effect, the accuracy rate and success rate of welding visual recognition can reach 100%, and at the same time, the first - pass welding qualification rate can be increased to more than 99%.

[0046] 2. The utility model also solves the problem that the metal dust cannot be effectively cleaned and collected during the processing of traditional milling cutters. Through the specially designed air knife disk 2, the metal dust on the surface of the wire feet is timely blown away, and the scattered metal dust is collected by the dust suction device placed at the center of the stator, effectively avoiding product quality problems caused by the metal dust falling into the stator winding.

Claims

1. A dust removal device for cutting the ends of motor stator windings, characterized in that: The invention comprises an air blowing device, a dust collecting device and a milling cutter device, wherein the air blowing device comprises an air inlet disk and a wind blade disk, both of which are annular in shape, and at least two air inlets are arranged at intervals along a circumferential direction on the outer side of the air inlet disk, and at least two air outlets are arranged at intervals along a circumferential direction on the inner side of the air inlet disk, the wind blade disk is coaxially arranged in the air inlet disk, at least two air inlet grooves are arranged at intervals along a circumferential direction on the outer side of the wind blade disk, and at least two air outlet grooves are arranged at intervals along a circumferential direction on the inner side of the wind blade disk, the air inlet, the air outlet, the air inlet groove and the air outlet groove are connected in sequence, the dust collecting device comprises a dust collecting disk and an air suction duct, the dust collecting disk is annular in shape, the dust collecting disk is coaxially arranged in the wind blade disk, at least two channels are arranged at intervals along a circumferential direction on the outer side of the dust collecting disk, the air suction duct is connected to the lower side of the dust collecting disk, and the channels are connected to the air suction duct, and the milling cutter device is located below the wind blade disk and outside the air suction duct.

2. The motor stator winding end trimming and dust removal device according to claim 1, characterized in that: The air inlet disc and the wind blade disc are integrated.

3. The motor stator winding end trimming and dust removal device according to claim 1, characterized in that: The number of the air inlets is four and they are evenly arranged along the circumferential direction.

4. The motor stator winding end trimming and dust removal device according to claim 1, characterized in that: The width of the air outlet slot is 0.5-1.5 mm, and the inner diameter of the wind knife disc is 200-600 mm.

5. The motor stator winding end trimming and dust removal device according to claim 1, characterized in that: The inner diameter of the air inlet disk is equal to the outer diameter of the wind blade disk, or the inner diameter of the air inlet disk is 0.5 to 1 mm larger than the outer diameter of the wind blade disk.

6. The motor stator winding end trimming and dust removal device according to claim 5, characterized in that: A sealing strip is provided at the connection between the wind blade disc and the air intake disc.

7. The motor stator winding end trimming and dust removal device according to claim 1, characterized in that: The milling cutter device comprises a milling cutter disc and a milling cutter disc motion connecting rod connected to the milling cutter disc.

8. The motor stator winding end trimming and dust removal device according to claim 7, characterized in that: The milling cutter disc has a thickness of 2 to 5 mm and a diameter of 30 to 200 mm.

9. The motor stator winding end trimming and dust removal device according to claim 7, characterized in that: The milling cutter disc motion connecting rod has a length adjustable mechanism, and the length adjustable range of the length adjustable mechanism is 30 to 500 mm.