JPH11215778A - Manufacture of stepping motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate the generation of the problem of scum rise, when shaving working is performed for forming the side surface or the circumferencial surface of a pole tooth part, in a manufacturing method of the rotor or the stator of a stepping motor. SOLUTION: In a manufacturing method of a stepping motor, in which iron segments are punched out from a metal bar and laminated, and prepared hole punching is performed in a part between pole tooth parts 1 or in a circumferencial surface of the pole tooth part 1, while leaving shaving margin. After that a shaving working, in which shaving punching is performed so that the outer peripheral region adjacent to a prepared hole punching region 2 is contained, is performed, and laminating is performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of manufacturing a stepping motor for punching and laminating an iron core piece from a metal strip, and more particularly, to manufacturing a stepping motor for shaving between pole teeth or a circumferential surface of a pole tooth of the stepping motor. About the method.

[0002]

2. Description of the Related Art Conventionally, a rotor and a stator of a stepping motor are manufactured by punching and laminating an iron core piece from a metal strip by using a press die. Is formed, sagging and breaks are formed on the side and circumferential surfaces of the pole teeth of the rotor and stator core pieces.

If sagging or breakage is formed on the side surface or the circumferential surface of the pole teeth, the area of the circumferential surface of the rotor and the stator becomes small, and as a result, the characteristics of the motor deteriorate. .

[0004] Therefore, there has been proposed a method using shaving processing when forming the side surface or the circumferential surface of the pole teeth portion.

[0005]

In the shaving process, a pre-drilling is performed while leaving a shaving allowance, and then the shaving is performed. However, the shaving process is performed in a narrow area such as a side surface and a circumferential surface of a stepping motor pole tooth portion. Is performed, fine scraps are generated in the shaving removing step, and there is a problem that the scraps rise.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems. In manufacturing a rotor or a stator of a stepping motor, even if shaving is performed on the side surface or the circumferential surface of the pole teeth portion, even if the shaving process is performed, it is possible to prevent the residue from rising. An object of the present invention is to provide a method for manufacturing a stepping motor that does not cause any problem.

[0007]

A feature of the present invention is a method of manufacturing a stepping motor for punching and laminating an iron core piece from a metal strip, wherein the stepping motor is provided between pole teeth or on a circumferential surface of a pole tooth. After punching a hole while leaving a shaving allowance, shaving processing for shaving is performed so as to include a region near the outer periphery of the pilot hole region, and lamination is performed.

In particular, after the space between the pole teeth or the circumferential surface of the pole tooth is divided into a plurality of punching regions and the pilot hole is punched,
To remove shaving.

In particular, it is another object of the present invention to perform shaving removal after preparing a prepared hole in a single punching region between the pole teeth or on the circumferential surface of the pole tooth.

[0010]

Embodiments of the present invention will be described below.

A method of manufacturing a stepping motor according to the present invention is a method of manufacturing a stepping motor in which an iron core piece of a rotor or a stator is punched out of a metal strip and laminated, wherein the stepping motor has a gap between pole teeth or a circumference of the pole teeth. This is a method for manufacturing a stepping motor in which a pre-drilling is performed while leaving a shaving allowance on a surface, and then shaving is performed so as to include a region near the outer periphery of the prepared-drilling region and stacked.

According to the above-described manufacturing method, the scrap generated during shaving shaving becomes ring-shaped and comes into contact with the outer peripheral surface of the die of the punching die, so that the problem of scrap rising can be prevented.

[0013] In another embodiment, the space between the pole teeth or the circumference of the pole teeth is divided into a plurality of punched regions, and a hole is prepared. If the shaving is removed in advance, the shape of the scrap generated during shaving removal does not become elongated, so that it is possible to particularly prevent the scrap from rising.

In another embodiment, after a hole is punched in a single punching region between the pole teeth or on the circumferential surface of the pole tooth, a region near the outer periphery of the pilot hole is included. If the shaving is removed, the scrap generated in the shaving can be formed in a square ring shape, so that the scrap can be further prevented from rising.

[0015]

Embodiment 1 Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

In this embodiment, a description will be given of an example in which press working using a progressive die is performed, and shaving processing is used for punching between pole teeth for forming side surfaces of rotor pole teeth of a stepping motor.

A pilot hole and a shaft hole are punched from the metal strip, and then a pilot hole is punched out while leaving a shaving allowance between the rotor pole teeth.

FIG. 1 is a view showing a part of a punching step of forming a rotor. As shown in FIG. 1A, a hatched portion including a region between pole teeth 1 is a pilot hole punching region 2. .

In FIG. 1, the dotted line indicates the rotor region 3.

Next, as shown in FIG. 1 (b), shaving is performed by punching out a shaving area 4 including an area in the vicinity of the outer periphery of the pilot hole area 2.
Form the sides.

Next, as shown in FIG.
Punching the rotor region 3 so as to cut the circumferential surface 5 of
The rotor is manufactured by lamination.

[0022]

[Embodiment 2] In this embodiment, an example will be described in which press working using a progressive die is performed, and shaving processing is used for punching a circumferential surface of a rotor pole tooth portion of a stepping motor.

A pilot hole and a shaft hole are punched out of the metal strip, and thereafter, a pilot hole is punched while leaving a shaving allowance near the circumference of each pole tooth portion.

FIG. 2 is a view showing a part of the step of punching the rotor. As shown in FIG. 2A, a region where a region serving as a shaving allowance is separated from a region of the circumferential surface 11 of the pole teeth portion 10 is formed. This is a prepared hole removal area 12.

In FIG. 2, a dotted line indicates the rotor region 13.

Next, as shown in FIG. 2B, shaving punching is performed by punching out a shaving region 14 including a region near the outer periphery of the pilot hole punching region 12, thereby forming a circumferential surface 11 of the pole teeth portion 10 of the rotor. I do.

Next, as shown in FIG.
The rotor region 13 is punched out so as to cut between the pole teeth portions 10 including the 0 side surface, and laminated to manufacture a rotor.

[0028]

[Embodiment 3] In this embodiment, an example will be described in which press working using a progressive die is performed, and shaving is used for punching the circumferential surface of the pole teeth of the stator of the stepping motor.

Pilot holes and other portions are punched out of the metal strip, and thereafter, pilot holes are punched out while leaving a shaving allowance near the circumference of each pole tooth portion.

FIG. 3 is a view showing a part of the step of punching the stator. As shown in FIG. 3A, a region where a region serving as a shaving allowance is separated from the region of the circumferential surface 21 of the pole teeth portion 20 is shown. Is a prepared hole punching region 22.

In the figure, the dotted line indicates the stator region 23.

Next, as shown in FIG. 3B, shaving punching is performed by punching out a shaving area 24 including an area near the outer periphery of the pilot hole punching area 22 to form a circumferential surface 21 of the pole teeth portion 20 in the stator. I do.

Next, as shown in FIG.
The gap 25 between the pole teeth including the 0 side face is punched.

Next, other punching of the yoke and the like is performed, and the stator region 23 is punched and laminated to manufacture a stator.

Although the present embodiment does not show an example of shaving between the pole teeth of the stator, the first embodiment does not.
The shaving process between the pole tooth portions is performed in the same manner as the shaving process between the rotor pole tooth portions shown in (1), and the other portions may be formed by ordinary punching and laminated.

[0036]

According to the above-described method of manufacturing a stepping motor according to the present invention, the scrap generated during shaving removal becomes ring-shaped and comes into contact with the outer peripheral surface of the die of the punching die. can do.

Further, a method is provided in which the hole between the pole teeth or the circumferential surface of the pole tooth is divided into a plurality of punched regions, and the holes are punched. According to the method, the shape of the scraps generated during shaving removal does not become elongated, so that it is possible to particularly prevent the scraps from rising.

Further, between each pole tooth portion or on the circumferential surface of the pole tooth portion,
According to the method of performing shaving removal so as to include a region near the outer periphery of the prepared punching region after performing the prepared punching of each of the punched regions, the cutout generated in the shaving removal is formed in a square ring shape. Therefore, it is possible to further prevent the waste from rising.

[Brief description of the drawings]

FIG. 1 is a view showing a part of a punching step according to an embodiment of the present invention.

FIG. 2 is a view showing a part of a punching step according to an embodiment of the present invention.

FIG. 3 is a view showing a part of a punching step according to the embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Pole tooth part 2 Preparatory hole area 3 Rotor area 4 Shaving area 5 Circumferential surface 10 Pole tooth part 11 Circumferential surface 12 Preparatory hole punching area 13 Rotor area 14 Shaving area 20 Pole tooth part 21 Circular surface 22 Pilot hole Area 23 Stator area 24 Shaving area 25 Between pole teeth

Claims (3)

[Claims] 1. A method of manufacturing a stepping motor for punching and laminating an iron core piece from a metal strip material, wherein a prepared hole is cut between pole teeth of the stepping motor or on a circumferential surface of the pole tooth while leaving a shaving allowance. A method of manufacturing a stepping motor, comprising: performing shaving processing for removing shaving so as to include a region near the outer periphery of a prepared hole forming region after performing the shaving process; 2. The stepping motor manufacturing method according to claim 1, wherein the shaving is performed after the pilot hole is formed by dividing the space between the pole teeth or the circumferential surface of the pole tooth into a plurality of punching regions. Method. 3. The stepping motor according to claim 1, wherein a shaving is performed after a prepared hole is formed in a single punched area between the pole teeth or on a circumferential surface of the pole tooth. Production method.