Soft magnetic alloy motor stator core and processing method thereof

Abstract

The invention provides a soft magnetic alloy motor stator core and a processing method thereof, and relates to the technical field of small and special motor manufacturing, the stator core is formed by bonding and pressing stator laminations of the same size, the stator laminations are of an annular structure, the stator laminations are further provided with two carrying edges used for fixing during wire cutting, and the two carrying edges are connected with the stator laminations. Wherein one carrying edge is provided with a conductive pin hole. According to the motor stator iron core made of the magnetically soft alloy material, the bonding strength of the stator laminations is improved through the change of the structure, and the bonding area required in the processing process is reduced, so that the phenomenon that the laminations are prone to glue failure in the processing process is avoided, and the qualified rate of products is improved.

Description

Technical Field

[0001] The invention relates to the technical field of micro motor manufacturing, and in particular provides a soft magnetic alloy motor stator core and a processing method thereof. Background Art

[0002] In micro motors, the traditional processing technology of stator core is: first cut the stator lamination blank into squares, then directly glue and press them to the designed height of the lamination, then wire cut them into shape, and finally grind the outer circle and inner hole to make the outer circle and inner hole of the stator core meet the design requirements of the stator assembly.

[0003] However, this method has the problem of large bonding area, insufficient extrusion of excess glue during lamination, and uneven thickness of the glue layer. After lamination, this will cause uneven distribution of the lamination glue relay force, resulting in low local bonding strength of parts and cracking when subjected to excessive external force. Summary of the invention

[0004] The purpose of the present application is to solve a series of problems caused by the large bonding area of ​​the existing stator core during the processing, and to provide a stator core that does not require large-area bonding.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a soft magnetic alloy motor stator core, the stator core is made of stator laminations of the same size bonded and pressed together, the stator laminations are annular structures, and the stator laminations are also provided with two edges for fixing during online cutting, one of the edges is provided with a conductive pin hole.

[0006] The soft magnetic alloy motor stator core provided by the present invention also has the following technical features: the stator core also includes wire embedding grooves evenly distributed along the circumference of the center hole of the stator core.

[0007] The soft magnetic alloy motor stator core provided by the present invention also has the technical feature that the pressed thickness of the stator laminations is greater than 50 mm.

[0008] Another object of the present invention is to provide a method for processing a soft magnetic alloy motor stator core, wherein the soft magnetic alloy motor stator core is as shown in any of the above items, comprising the following steps:

[0009] S1: laser cutting to obtain stator lamination blanks;

[0010] S2: using the stator lamination blank to manufacture a stator core blank;

[0011] S3: Processing conductive pin holes and assembling conductive pins;

[0012] S4: Perform wire cutting on the outer circle and wire embedding slots of the stator core blank to obtain a soft magnetic alloy stator core.

[0013] The processing method of the soft magnetic alloy motor stator core provided by the present invention also has the following technical features: the outer diameter of the stator laminate blank is 4mm-6mm larger than the outer diameter of the stator laminate; the center hole diameter of the stator laminate blank is 4mm-6mm smaller than the center hole diameter of the stator laminate; the length of the shoulder of the stator laminate blank is 8mm; and the fixed width of the shoulder of the stator laminate blank is 1 / 3 of the diameter of the stator laminate blank.

[0014] The processing method of the soft magnetic alloy motor stator core provided by the present invention also has the following technical feature: after the conductive pin is installed in the conductive pin hole, the end surface of the conductive pin is flush with the conductive pin hole.

[0015] The method for processing the soft magnetic alloy motor stator core provided by the present invention also has the following technical features: the S4 further comprises grinding the outer circle after the online cutting, with the feed amount each time being no greater than 0.02 mm.

[0016] Beneficial Effects

[0017] The soft magnetic alloy material motor stator core proposed in the present invention improves the stator lamination bonding strength through structural changes, reduces the bonding area required during the processing, thereby avoiding the phenomenon of lamination easily coming apart during the processing and improving the product qualification rate.

[0018] The present invention proposes a method for processing a motor stator core made of a soft magnetic alloy material, which avoids the problems of part breakage and lamination debonding by taking factors such as reducing the bonding area, facilitating the extrusion of excess glue and existing processing capabilities into consideration, thereby improving the qualified rate of products. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present disclosure, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A cross-sectional view of the stator core of the soft magnetic alloy motor provided by the present invention;

[0021] Figure 2 This is an axial cross-sectional view of the stator core of the soft magnetic alloy motor provided by the present invention;

[0022] Figure 3 A schematic diagram of the structure of a stator lamination blank provided in an embodiment of the present invention.

[0023] Among them, 1: stator laminations; 2: stator end pieces; 3: outer circle; 4: center hole; 5: wire embedding groove. DETAILED DESCRIPTION

[0024] The present application is further described in detail below in conjunction with the accompanying drawings and examples, but it should be noted that these implementation methods are not limitations of the present application, and equivalent changes or substitutions in functions, methods, or structures made by ordinary technicians in the field based on these implementation methods are all within the scope of protection of the present application.

[0025] In the description of the embodiments of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the creation of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the creation of the present application.

[0026] In addition, the terms "first", "second", "third", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the invention of this application, unless otherwise specified, the meaning of "plurality" is two or more.

[0027] The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the invention of this application can be understood by specific circumstances.

[0028] like Figure 1-3 As shown, the embodiment of the present application provides a soft magnetic alloy motor stator core, the stator core is made of stator laminations 1 of the same size bonded and pressed together, the stator laminations 1 are annular structures, and the stator laminations 1 are also provided with two sidewalls for fixing during line cutting, one of which is provided with a conductive pin hole. The end provided with the conductive pin hole is the end of the stator end piece 2.

[0029] In some embodiments, the stator core further includes wire embedding grooves 5 evenly distributed along the circumference of the stator core center hole 4 .

[0030] In some embodiments, the pressed thickness D of the stator laminations 1 is greater than 50 mm.

[0031] In some embodiments, a method for processing a soft magnetic alloy motor stator core is provided. The soft magnetic alloy motor stator core is as shown in any of the above items, comprising the following steps:

[0032] S1: laser cutting to obtain stator lamination blanks;

[0033] S2: using the stator lamination blank to manufacture a stator core blank;

[0034] S3: Processing conductive pin holes and assembling conductive pins;

[0035] S4: performing wire cutting on the outer circle 3 and the wire embedding slots 5 of the stator core blank to obtain a soft magnetic alloy stator core.

[0036] In some embodiments, the outer diameter R1 of the stator lamination blank is 4mm-6mm larger than the outer diameter of the stator lamination; the center hole diameter R4 of the stator lamination blank is 4mm-6mm smaller than the center hole diameter of the stator lamination; the shoulder length L1 of the stator lamination blank is 8mm; and the shoulder fixed width W of the stator lamination blank is 1 / 3 of the diameter of the stator lamination blank.

[0037] In some embodiments, after the conductive pin is inserted into the conductive pin hole, the end surface of the conductive pin is flush with the conductive pin hole.

[0038] In some embodiments, S4 further includes grinding the outer circle 3 after the online cutting, with the feed amount each time being no greater than 0.02 mm.

[0039] In some embodiments, a motor stator core is processed, the material of which is a soft magnetic alloy 35WW300, and the processing steps are:

[0040] 1. Laser cutting of stator lamination blanks: The diameter of the stator lamination is 48mm, the diameter of the center hole of the stator lamination is 25mm, the diameter of the stator lamination blank is 52mm, the diameter of the center hole of the stator lamination blank is 21mm, the fixed length of the stator lamination blank wire cutting edge is 8mm, and the fixed width of the stator lamination blank wire cutting edge is 17mm;

[0041] 2. Manufacturing stator core blanks;

[0042] 3. Drill a hole of φ5 and press in a conductive pin: Drill a hole of φ5 and press in a φ5 pin, with one end of the pin flush with the hole opening;

[0043] 4. Wire cutting forming and grinding of outer circle and center hole: Use wire cutting slow wire processing method to process the stator core assembly, grind the outer circle and center hole, and the feed amount each time shall not exceed 0.02mm until it meets the requirements of the drawing.

[0044] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application. The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present application, and these improvements and variations should also be regarded as the protection scope of the present application.

Claims

1. A soft magnetic alloy motor stator core, characterized in that: The stator core is made of stator laminations of the same size bonded and pressed together. The stator laminations are annular in structure. The stator laminations are also provided with two edges for fixing during line cutting, and one of the edges is provided with a conductive pin hole.

2. The soft magnetic alloy motor stator core according to claim 1, characterized in that: The stator core also includes wire embedding grooves evenly distributed along the circumference of the central hole of the stator core.

3. The soft magnetic alloy motor stator core according to claim 1, characterized in that: The pressed thickness of the stator laminations is greater than 50 mm.

4. A method for processing a soft magnetic alloy motor stator core, characterized in that: The soft magnetic alloy motor stator core is as shown in any one of claims 1 to 3, comprising the following steps: S1: laser cutting to obtain stator lamination blanks; S2: using the stator lamination blank to manufacture a stator core blank; S3: Processing conductive pin holes and assembling conductive pins; S4: Perform wire cutting on the outer circle and wire embedding slots of the stator core blank to obtain a soft magnetic alloy stator core.

5. The method for processing the soft magnetic alloy motor stator core according to claim 4, characterized in that: The outer diameter of the stator lamination blank is 4mm-6mm larger than the outer diameter of the stator lamination; the center hole diameter of the stator lamination blank is 4mm-6mm smaller than the center hole diameter of the stator lamination; the length of the shoulder of the stator lamination blank is 8mm; the fixed width of the shoulder of the stator lamination blank is 1 / 3 of the diameter of the stator lamination blank.

6. The method for processing a soft magnetic alloy motor stator core according to claim 4, characterized in that: After the conductive pin is inserted into the conductive pin hole, the end surface of the conductive pin is flush with the conductive pin hole.

7. The method for processing a soft magnetic alloy motor stator core according to claim 4, characterized in that: The S4 also includes grinding the outer circle after the online cutting, with the feed amount each time being no more than 0.02 mm.

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