Stator core wire passing groove processing technology

Abstract

The invention provides a stator iron core wire passing groove machining process. The stator iron core wire passing groove machining process comprises the following process steps of designing a stator punching sheet stamping die, selecting a stator punching sheet material, selecting a silicon steel sheet for stator punching sheet punching, adopting the stamping die, assembling the stamping die on a stamping machine tool, and punching a wire passing groove together during punching sheet blanking. And after stamping is completed, insulating coating stacking and fixed welding are carried out. The stator iron core is formed by laminating the stator punching sheets, and the wire passing grooves are punched together when the punching sheets are blanked, so that according to the wire passing groove processing method, a wire passing groove punch is only needed to be added when a punching sheet blanking die or a compound die is manufactured, the processing procedures and the step of cleaning scrap iron are reduced, the wire passing grooves are neat and free of scrap iron after the punching sheets are pressed, and the production efficiency is improved. And the problems that the straightness is affected by secondary machining, and potential quality hazards are caused by incomplete scrap iron cleaning are solved.

Description

Technical Field

[0001] The invention relates to the technical field of mining motor manufacturing, and in particular to a stator core wire slot processing technology. Background Art

[0002] As the market and demand for motor production continue to increase, installing temperature control elements in motors and monitoring the motor bearing temperature is a necessary step in motor production. After the temperature control element is installed, it is necessary to use a connecting wire to connect the temperature control element to the control insulator in the wiring cavity. The wire groove of the stator core is mainly to enable the connecting wire of the temperature thermistor to pass through the wire groove from the rear bearing end of the motor to the control insulator in the wiring cavity, which plays a role in protecting the connecting wire of the thermistor, making the connecting wire of the front and rear bearing temperature measuring elements beautiful and neat, and fixing the thermistor circuit. The addition of wire grooves to the motor stator core is not only used to fix the leads of the thermistor, but also plays a role in protecting the circuit and ensuring the safe operation of the motor.

[0003] Current motor processing methods and existing problems: The current processing method is to transfer the stator core to the machining center after the stator core is pressed, draw lines on the outer circle of the stator core, and then process it on the milling machine. This processing method requires process turnover, and the straightness of the core after processing is out of tolerance. If the iron chips after processing are not cleaned up properly, it will affect the quality of the motor and cause quality risks. Summary of the invention

[0004] In view of this, it is necessary to provide a stator core wire slot processing technology.

[0005] A stator core wire slot processing technology includes the following process steps:

[0006] Design a stamping die for stator punching sheets. The stamping die includes an upper die seat, an upper die assembly, a wire slot punch, a key slot punch, a shaft hole punch pad, an upper stripping plate, a lower die seat, a lower die seat pad, a lower die outer plate, a lower die outer pad, a lower outer stripping plate and a guide column. The upper die assembly, the wire slot punch, the key slot punch, the shaft hole punch pad and the upper stripping plate are assembled on the upper die seat. The wire slot punch is located at the upper die assembly. The key slot punch is fixed at the position of the shaft hole punch. The shaft hole punch pad is located in the middle of the upper die seat. The lower die seat pad, the lower die outer plate, the lower die outer pad, the lower outer stripping plate and the guide column are assembled on the lower die seat.

[0007] Select the material for the stator punching sheet, use silicon steel sheets to punch the stator punching sheet, use the stamping die, equip the stamping die on the stamping machine, and punch out the wire groove together when the sheet is blanked; after stamping, stack the insulation coating and fix it with welding.

[0008] Preferably, the thickness of the silicon steel sheet is 0.5 mm, and the silicon content is about 3%-5%.

[0009] Preferably, the stamping die is made of cemented carbide.

[0010] Preferably, the punch press tonnage is in the range of 100-200 tons.

[0011] The stator core is formed by stacking stator punching sheets, and the wire slots are punched out together when the punching sheets are blanked. This wire slot processing method only requires adding a wire slot punch when manufacturing the punching sheet blanking die or compound die, which reduces the processing steps and the steps of cleaning iron filings. Moreover, after the punching sheets are pressed, the wire slots are neat and free of iron filings, and there will be no quality risks caused by secondary processing affecting the straightness and unclean cleaning of iron filings. This method saves manufacturing costs, shortens the component manufacturing cycle, improves production efficiency, and solves the quality risks of the product. This method has been used in multiple products with good results and high production efficiency. It solves the problem of iron filings in processing wire slots affecting the quality of the motor, and achieves the purpose of improving product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the stamping die structure;

[0013] In the figure: upper die base 1, upper die assembly 2, wire slot punch 3, keyway punch 4, shaft hole punch pad 5, upper stripper plate 6, lower die base 7, lower die base pad 8, lower die outer plate 9, lower die outer pad 10, lower outer stripper plate 11, guide column 12, lower template 13, lower die inner pad 14. DETAILED DESCRIPTION

[0014] In order to make the technical solution of the present invention easier to understand, the technical solution of the present invention is now clearly and completely described in the form of specific embodiments in conjunction with the accompanying drawings.

[0015] A stator core wire slot processing technology includes the following process steps:

[0016] Design of stator lamination stamping die, please also refer to Figure 1The stamping die includes an upper die base 1, an upper die assembly 2, a wire slot punch 3, a key slot punch 4, an axial hole punch pad 5, an upper stripping plate 6, a lower die base 7, a lower die base pad 8, a lower die outer plate 9, a lower die outer pad 10, a lower outer stripping plate 11, a guide column 12, a lower die plate 13 and a lower die inner pad 14. The upper die assembly 2, the wire slot punch 3, the key slot punch 4, the axial hole punch pad 5 and the upper stripping plate 6 are assembled on the upper die base 1, the wire slot punch 3 is located at the upper die assembly 2, and the key slot punch 4 and the axial hole punch pad 5 are fixed and located in the middle position of the upper die base 1; the lower die outer plate 9, the lower die outer pad 10, the lower outer stripping plate 11 and the guide column 12 are assembled on the lower die base; the lower die base pad 8 is located on the machine tool plane and is used to adjust the closing height of the machine tool. A wire groove punch is added to the upper die assembly 2. The upper die assembly 2 is a convex die. Grooves corresponding to the wire grooves are also added to the corresponding positions of the lower die plate 13 and the lower die inner pad 14. As the stamping machine moves up and down, the upper die base 1 and the corresponding components are driven to rise and fall. When the upper die base 1 and the components fall, they cooperate with the cutting edge of the lower die plate 13. The lower die plate 13 is a concave die, and the material will be punched into the required shape.

[0017] Select stator steel sheets, and then stamp them. The stator core is made of stacked stator punching sheets. The wire slots are punched out together when the sheets are blanked. This wire slot processing method only requires adding wire slot punches when manufacturing punching sheet blanking dies or compound dies, which reduces the processing steps and the steps of cleaning iron filings. Moreover, after the punching sheets are pressed, the wire slots are neat and free of iron filings, stacked, welded, fixed and insulated. The stator core is the core component of the motor. The manufacturing process needs to take into account both precision and efficiency. The process flow is divided into several key links.

[0018] The material selection is mainly silicon steel sheet, with a thickness of 0.5 mm and a silicon content of about 3%-5%, which can effectively reduce eddy current loss. The die is used to stamp the stator sheet, and the stamping die is made of hard alloy.

[0019] The tonnage of the punch press for stamping is in the range of 200-400 tons.

[0020] The stator core is made of stacked stator punching sheets. When the punching sheets are blanked, the wire slots are punched out together. This wire slot processing method only requires adding a wire slot punch when manufacturing the punching sheet blanking die or compound die, which reduces the processing steps and the link of cleaning iron chips. Moreover, after the punching sheets are pressed, the wire slots are neat and free of iron chips, and there will be no quality risks caused by secondary processing affecting straightness and unclean cleaning of iron chips. This method saves manufacturing costs, shortens the component manufacturing cycle, improves production efficiency, and solves product quality risks.

[0021] This method has been used in multiple products with good results and high production efficiency. It solves the problem of iron filings from processing wire slots affecting motor quality, thus achieving the goal of improving product quality.

[0022] It should be noted that the embodiments described herein are only partial embodiments of the present invention, rather than all implementations of the present invention, and the embodiments are only exemplary, and their role is only to provide a more intuitive and clear way to understand the content of the present invention, rather than to limit the technical solutions described in the present invention. Without departing from the concept of the present invention, all other implementation methods that can be thought of by ordinary technicians in this field without creative work, and other simple replacements and various changes to the technical solutions of the present invention, all belong to the protection scope of the present invention.

Claims

1. A stator core wire slot processing technology, characterized in that: The stator core wire slot processing technology includes the following process steps: Design a stamping die for stator punching sheets. The stamping die includes an upper die seat, an upper die assembly, a wire slot punch, a key slot punch, a shaft hole punch pad, an upper stripping plate, a lower die seat, a lower die seat pad, a lower die outer plate, a lower die outer pad, a lower outer stripping plate and a guide column. The upper die assembly, the wire slot punch, the key slot punch, the shaft hole punch pad and the upper stripping plate are assembled on the upper die seat. The wire slot punch is located at the upper die assembly. The key slot punch is located between the left and right upper stripping plates. The shaft hole punch pad is located in the middle of the upper die seat. The lower die seat pad, the lower die outer plate, the lower die outer pad, the lower outer stripping plate and the guide column are assembled on the lower die seat. Select the material for the stator punching sheet, use silicon steel sheets to punch the stator punching sheet, use the stamping die, equip the stamping die on the stamping machine, and punch out the wire groove together when the sheet is blanked; after stamping, stack the insulation coating and fix it with welding.

2. A process for machining stator core wire slots as claimed in claim 1, characterized in that: The thickness of silicon steel sheet is 0.5mm and the silicon content is about 3%-5%.

3. A process for machining stator core wire slots as claimed in claim 1, characterized in that: The stamping die is made of cemented carbide.

4. A process for machining stator core wire slots as claimed in claim 1, characterized in that: The tonnage of the punch press for stamping is in the range of 200-400 tons.

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