阅读说明：本技术 定子铁芯的制作方法及电机 (Manufacturing method of stator core and motor ) 是由 王佳皓 于 2019-10-16 设计创作，主要内容包括：本申请公开了一种定子铁芯的制作方法及电机,属于电机技术领域。该方法包括：对非晶带材进行叠装设置,得到一段包括有本体和多个凸起部的铁芯结构,卷绕所述铁芯结构,得到呈环形结构的半成品定子铁芯,在预设温度下对所述半成品定子铁芯进行热处理,以降低所述半成品定子铁芯的应力,对热处理后的所述半成品定子铁芯进行固化处理,对固化处理后的所述半成品定子铁芯的每个凸起部进行镗磨,得到成品定子铁芯。本申请中,由于通过非晶带材进行叠装设置制作定子铁芯,从而提高了材料的利用率。另外,对非晶带材进行叠装设置可以直接得到一段包括有本体和多个凸起部的铁芯结构,从而简化了定子铁芯的制作工艺,提高了定子铁芯的制作效率。(The application discloses a manufacturing method of a stator core and a motor, and belongs to the technical field of motors. The method comprises the following steps: the method comprises the steps of stacking amorphous strips, obtaining a section of iron core structure comprising a body and a plurality of protruding portions, winding the iron core structure to obtain a semi-finished stator iron core with an annular structure, performing heat treatment on the semi-finished stator iron core at a preset temperature to reduce stress of the semi-finished stator iron core, performing curing treatment on the semi-finished stator iron core after the heat treatment, and boring and grinding each protruding portion of the semi-finished stator iron core after the curing treatment to obtain a finished stator iron core. In the application, because the stator core is manufactured by stacking the amorphous strips, the utilization rate of the material is improved. In addition, the amorphous strip is stacked, so that a section of iron core structure comprising the body and the plurality of protruding parts can be directly obtained, the manufacturing process of the stator iron core is simplified, and the manufacturing efficiency of the stator iron core is improved.)

1. A method of making a stator core, the method comprising:

stacking the amorphous strips to obtain an iron core structure comprising a body and a plurality of convex parts, wherein the convex parts are distributed along the length direction of the body;

winding the iron core structure to obtain a semi-finished stator iron core in an annular structure;

carrying out heat treatment on the semi-finished stator core at a preset temperature so as to reduce the stress of the semi-finished stator core;

curing the semi-finished stator core after heat treatment;

and boring and grinding each bulge of the semi-finished stator core after the curing treatment to obtain a finished stator core.

2. The method of claim 1, wherein said winding said core structure to provide a semi-finished stator core in an annular configuration comprises:

winding the iron core structure based on an annular grinding tool, wherein the circumference of the annular grinding tool is equal to the length of the iron core structure;

and butting and fixing two ends of the iron core structure to obtain the semi-finished stator iron core.

3. The method of claim 2, wherein said fixedly abutting and fixing the two ends of the core structure to obtain the semi-finished stator core comprises:

fixedly connecting two ends of the iron core structure;

and multiple layers of soft magnetic materials are wound on the outer ring of the iron core structure after the two ends of the iron core structure are fixedly connected in a laminated mode.

4. The method of claim 3, wherein the soft magnetic material is silicon steel or amorphous ribbon.

5. The method of any of claims 2-4, wherein an end of each projection distal from the body is directed toward a center point of the semi-finished stator core.

6. The method of claim 1, wherein the boring each lobe of the semi-finished stator core after the curing process comprises:

and boring and grinding each convex part to expose the cross section of the amorphous strip.

7. The method of claim 1 or 6, wherein each of the bored bosses is of a rectangular configuration or a T-shaped configuration.

8. The method of claim 1, wherein said subjecting said semi-finished stator core after heat treatment to a curing process comprises:

and performing paint dipping treatment or gluing treatment on the semi-finished stator core after heat treatment.

9. The method of claim 1, wherein the plurality of protrusions are evenly distributed along the length of the body.

10. An electrical machine comprising a stator core made by the method of any one of claims 1 to 9.

Technical Field

The application relates to the technical field of motors, in particular to a manufacturing method of a stator core and a motor.

Background

The motor stator is an important component in the motor, wherein the motor stator mainly includes a stator core and a stator coil, and the stator core is used for fixing the stator coil and forming a magnetic flux loop of a magnetic field.

In the related art, when a stator core is manufactured, a plurality of toothed ring pieces are punched from an amorphous strip or silicon steel, the toothed ring pieces are stacked, and then the stator core is obtained through welding or bonding and the like. However, when the stator core is manufactured in this way, it is necessary to ensure that the plurality of punched tooth-shaped ring pieces are the same, thereby increasing the processing difficulty of the stator core. In addition, when the toothed ring sheet is punched, the waste of amorphous strips and silicon steel is easily caused, and the utilization rate of materials is low.

Disclosure of Invention

The application provides a manufacturing method of a stator core and a motor, and can solve the problems of complex manufacturing process and low material utilization rate of the stator core. The technical scheme is as follows:

in a first aspect, a method of making a stator core, the method comprising:

stacking the amorphous strips to obtain an iron core structure comprising a body and a plurality of convex parts, wherein the convex parts are distributed along the length direction of the body;

winding the iron core structure to obtain a semi-finished stator iron core in an annular structure;

carrying out heat treatment on the semi-finished stator core at a preset temperature so as to reduce the stress of the semi-finished stator core;

curing the semi-finished stator core after heat treatment;

and boring and grinding each bulge of the semi-finished stator core after the curing treatment to obtain a finished stator core.

Optionally, the winding the core structure to obtain a semi-finished stator core in an annular structure includes:

winding the iron core structure based on an annular grinding tool, wherein the circumference of the annular grinding tool is equal to the length of the iron core structure;

and butting and fixing two ends of the iron core structure to obtain the semi-finished stator iron core.

Optionally, the butt-jointing and fixing the two ends of the core structure to obtain the semi-finished stator core includes:

fixedly connecting two ends of the iron core structure;

and multiple layers of soft magnetic materials are wound on the outer ring of the iron core structure after the two ends of the iron core structure are fixedly connected in a laminated mode.

Optionally, the soft magnetic material is silicon steel or amorphous strip.

Optionally, an end of each protrusion portion away from the body faces a central point of the semi-finished stator core.

Optionally, the boring and grinding each protruding portion of the semi-finished stator core after the curing treatment includes:

and boring and grinding each convex part to expose the cross section of the amorphous strip.

Optionally, each of the bored bosses has a rectangular configuration or a T-shaped configuration.

Optionally, the curing the semi-finished stator core after the heat treatment includes:

and performing paint dipping treatment or gluing treatment on the semi-finished stator core after heat treatment.

Optionally, the plurality of protrusions are evenly distributed along the length direction of the body.

In a second aspect, an electric machine includes a stator core fabricated by the method of the above aspect.

The beneficial effects that technical scheme that this application provided brought can include at least:

because the stator core is obtained by stacking the amorphous strips, blanking of the amorphous strips is avoided, material waste is avoided, and the utilization rate of the material is improved. In addition, the amorphous strip is stacked, so that a section of iron core structure comprising the body and the plurality of protruding parts can be directly obtained, and then the finished stator core can be obtained through winding, heat treatment, curing treatment and boring and grinding of the iron core structure, so that the manufacturing process of the stator core is simplified, and the manufacturing efficiency of the stator core is improved.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic flow chart of a method for manufacturing a stator core according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a core structure provided in an embodiment of the present application;

fig. 3 is a schematic structural diagram of a semi-finished stator core provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a finished stator core according to an embodiment of the present application.

Reference numerals:

1: an iron core structure; 11: a body; 12: a boss portion; 2: a soft magnetic material.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 1 is a schematic flow chart of a method for manufacturing a stator core according to an embodiment of the present application. Referring to fig. 1, the method includes the following steps.

Step 101: the amorphous strip is stacked to obtain an iron core structure comprising a body and a plurality of protruding parts, and the plurality of protruding parts are distributed along the length direction of the body.

An amorphous ribbon refers to a metallic ribbon with randomly arranged atoms within the material. In some embodiments, the metal in the molten state may be sprayed onto a high-speed rotating chill roll, where the metal in the molten state is rapidly cooled at a rate of millions of degrees per second to obtain an amorphous ribbon.

Wherein the thickness of the amorphous strip is generally between 12-35 microns, and the thickness of the amorphous strip can be 25 microns.

When the amorphous strip is stacked, the operation can be performed manually or by using stacking equipment, so as to obtain the iron core structure shown in fig. 2. And for the convenience of operation, the iron core die can be stacked.

The iron core structure can be obtained by stacking a whole amorphous strip, and the iron core structure can be stacked layer by layer. Of course, the core structure can also be obtained by stacking a plurality of amorphous strips with the same width. At this time, at least one layer may be stacked at a time for stacking.

It should be noted that, because the width of the amorphous strip may be much smaller than the axial length of the stator core, at least one core structure may be obtained by stacking the amorphous strips, and then the at least one core structure may be spliced in the width direction to obtain the stator core with the required axial length. In addition, the iron core structure can be directly obtained through the stacking arrangement, so that the waste of amorphous strips is avoided, and the utilization rate of materials is improved.

The iron core die can comprise a flat plate and a plurality of grooves distributed in the flat plate along the linear direction, and the bottom surface of each groove can be provided with a magnetic material. Therefore, the amorphous strip can be flatly laid on the flat plate, the amorphous strip is sequentially pressed into each groove through manual operation or stacking equipment and is adsorbed on the magnetic material, then the amorphous strip is flatly laid, and the operation is repeated, so that the iron core structure is obtained.

It should be noted that, when the amorphous strip is sequentially pressed into each groove through the stacking device, in some embodiments, an extrusion block may be disposed on the stacking device, and the width of the extrusion block may be reduced for each layer of amorphous strip stacked, so as to ensure that each groove can be completely filled with the amorphous strip after the stacking device is completed.

In other embodiments, an extrusion plate may be disposed on the stacking apparatus, and each amorphous ribbon may be stacked by extrusion between the extrusion plate and the core mold, so that each groove may be completely filled with the amorphous ribbon. The moving track of the extrusion plate can be set based on the lengths of the iron core structure and the grooves in the linear direction, the depth of each groove, the thickness of the amorphous strip and the stacking thickness of the amorphous strips.

Furthermore, when the amorphous strip is pressed into the groove, in order to ensure that the bent structure of the amorphous strip is the same as the section structure of the groove along the length direction, a magnetic material can be arranged on each groove on a plane perpendicular to the linear direction, so that the attractive appearance of the bent amorphous strip is ensured through the attraction of the magnetic materials on the three surfaces to the amorphous strip.

The body that the iron core structure that sets up to the stack sets up and obtain can regard as stator core's yoke portion, and a plurality of bellying that the iron core structure includes can regard as stator core's tooth portion. Wherein, the length direction evenly distributed that a plurality of bellying that the iron core structure includes can follow the body, and the quantity of a plurality of bellying can be confirmed according to the motor that stator core corresponds in advance.

Step 102: and winding the iron core structure to obtain the semi-finished stator iron core with an annular structure.

Thus, after the core structure is obtained, the core structure can be wound to obtain a semi-finished stator core in an annular structure. The semi-finished stator core is an iron core which is obtained in the manufacturing process, has the same shape as the stator core and cannot be used.

In some embodiments, the core structure may be wound based on a ring mill, and then both ends of the core structure are fixed in a butt joint manner, so as to obtain a semi-finished stator core.

The circumference of the annular mold may be equal to the length of the iron core structure, or may be smaller than the length of the iron core structure, as long as the two ends of the iron core structure can be connected. When the circumference of the ring-shaped grinding tool is smaller than the length of the core structure, the core structure may be cut based on the circumference of the ring-shaped mold after the core structure is wound by the ring-shaped mold.

And one end of each obtained semi-finished stator core, which is far away from the body, of each protruding part faces towards the central point of the semi-finished stator core, and the semi-finished stator core can be a semi-finished product of the outer stator core. One end, far away from the body, of each protruding portion on the obtained semi-finished stator core is back to the central point of the semi-finished stator core, and the semi-finished stator core can be a semi-finished product of the inner stator core.

It should be noted that, in some embodiments, the abutting of the two ends of the core structure may be achieved as follows to obtain a semi-finished stator core.

After the two ends of the iron core structure are opposite to each other through winding, the two ends of the iron core structure can be fixedly connected, and multiple layers of soft magnetic materials are wound on the outer ring of the iron core structure after the two ends are fixedly connected in a laminating mode, so that the semi-finished stator iron core shown in fig. 3 is obtained.

It should be noted that each protruding portion and the two butted ends can be fixed by a steel band or other fastening members, so as to fix the plurality of protruding portions and to fixedly connect the two ends of the core structure. The soft magnetic material is mainly used for fixing the annular iron core structure and plays a role of a magnetic yoke. Soft magnetic material can be silicon steel or amorphous strip etc. certainly also can be other materials, as long as can realize fixing annular iron core structure, can play the effect of yoke simultaneously can, this application embodiment does not do the restriction to this.

Further, before the core structure is wound, each of the plurality of protrusions may be fixed in advance in order to avoid a fluffy deformation of at least one of the plurality of protrusions. Each boss may be tied, for example with a steel strap, to achieve the fixing.

Step 103: and carrying out heat treatment on the semi-finished stator core at a preset temperature so as to reduce the stress of the semi-finished stator core.

In some embodiments, the semi-finished stator core may be placed in a furnace where a heat treatment is performed. Wherein, the temperature in the heating furnace can be kept at a preset temperature, and the preset temperature can be between 370 and 380 degrees centigrade, and exemplarily, the preset temperature can be 375 degrees centigrade. In addition, nitrogen gas can be introduced into the heating furnace for protection, and of course, other gases can be introduced for protection, and the like, which is not limited in the embodiment of the present application.

It should be noted that the preset temperature for performing the heat treatment is generally determined by the material of the amorphous strip, so as to better reduce the stress of the amorphous strip.

Step 104: and curing the semi-finished stator core after heat treatment.

After the semi-finished stator core is subjected to heat treatment, fixing treatment can be performed so that the semi-finished stator core is solidified into a whole, namely, each layer of amorphous strip and the wound soft magnetic material included in the core structure can be solidified into a whole.

In some embodiments, the paint liquid and the gasoline are mixed in a ratio of 2:3 to obtain a cured paint, then the heat-treated semi-finished stator core is immersed into the cured paint, and the cured paint is taken out and dried after the whole semi-finished stator core is fully covered with the cured paint, so that the heat-treated semi-finished stator core is cured.

Of course, in other embodiments, the semi-finished stator core after the heat treatment may be cured by an adhesive treatment process, and the specific curing treatment process may refer to related technologies, which are not described herein again in this embodiment of the present application.

Step 105: and boring and grinding the bulge of the cured semi-finished stator core to obtain the finished stator core.

For the semi-finished stator core after the curing treatment, each protruding portion may be bored and ground to obtain a finished stator core as shown in fig. 4, thereby implementing the manufacturing of the stator core.

The finished stator core refers to a usable core obtained after all manufacturing processes are completed. When each protrusion is bored, each protrusion can be caused to expose a cross section of the amorphous ribbon. The cross section of the amorphous strip exposing at least one layer can be the cross section of the amorphous strip exposing each layer.

In addition, when each protruding portion is bored and ground, only the end face of one end, far away from the body, of each protruding portion can be bored and ground, so that each protruding portion is of a rectangular structure, namely, an open slot is formed between every two adjacent protruding portions. Of course, two opposite sides of each protruding portion can be bored, so that each protruding portion is in a T-shaped structure, that is, a non-closed opening groove is formed between two adjacent protruding portions. Wherein, the structure size of each convex part is the same after boring and grinding.

In the embodiment of the application, the stator core is obtained by stacking the amorphous strips, so that the manufacture of the stator core is not restricted by the width of the amorphous strips any more, the blanking of the amorphous strips is avoided, the waste of materials is avoided, and the utilization rate of the materials is improved. In addition, the amorphous strip is stacked, so that a section of iron core structure comprising the body and the plurality of protruding parts can be directly obtained, and then the finished stator core can be obtained through winding, heat treatment, curing treatment and boring and grinding of the iron core structure, so that the manufacturing process of the stator core is simplified, and the manufacturing efficiency of the stator core is improved.

The embodiment of the application provides a motor. The motor comprises the stator core manufactured by the method in the embodiment.

In the embodiment of the application, the utilization rate of materials is improved in the manufacturing process of the stator core, the manufacturing process of the stator core is simplified, and the manufacturing efficiency of the stator core is improved. Therefore, the use cost of the motor using the stator core can be reduced.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.