JP3544117B2 - Manufacturing method of laminated iron core - Google Patents
Manufacturing method of laminated iron core Download PDFInfo
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- JP3544117B2 JP3544117B2 JP06445098A JP6445098A JP3544117B2 JP 3544117 B2 JP3544117 B2 JP 3544117B2 JP 06445098 A JP06445098 A JP 06445098A JP 6445098 A JP6445098 A JP 6445098A JP 3544117 B2 JP3544117 B2 JP 3544117B2
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- Prior art keywords
- shaving
- rotor
- iron core
- pole tooth
- punching
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Description
【０００１】
【発明の属する技術分野】
金属条材から鉄心片を打抜き、積層するステッピングモータ用積層鉄心の製造方法に関し、特にステッピングモータのロータ用積層鉄心の極歯部側面および極歯部円周面にシェービング加工を行い、積層するステッピングモータ用積層鉄心の製造方法に関する。
【０００２】
【従来の技術】
従来、ステッピングモータのロータもしくはステータ用積層鉄心は、プレス金型により、金属条材から鉄心片を打ち抜き、積層する方法によって製造されるが、従来の打ち抜きでは、加工面にダレや破断部が形成されるため、積層される鉄心片の極歯部において、側面および円周面にダレや破断部が形成される。
【０００３】
極歯部の側面および円周面にダレや破断部が形成されると、ロータ及びステータの円周面の面積が小さくなり、その結果、モータの特性を低下させる要因となっていた。
【０００４】
そこで、極歯部の側面および円周面を形成する方法に、シェービング加工を用いる方法が提案されている。
【０００５】
【発明が解決しようとする課題】
しかしながら、極歯部の側面と円周面との間の角部を含む極歯部側面および円周面を同じ工程で形成すると、側面と円周面との間の角部を鋭角に形成するためのパンチが必要となるが、鋭角な角部を打ち抜くパンチを形成することは難しく、図２に示すように鉄心片１の角部２が丸くなってしまい、モータの特性が下がる問題があった。
【０００６】
本発明は、以上の問題に鑑みて為されたもので、ステッピングモータのロータ用積層鉄心の製造において、積層鉄心極歯部の側面および円周面の形成にシェービング加工を行っても、側面と円周面との間の角部を鋭角に形成できるステッピングモータ用積層鉄心の製造方法を提供することを目的とする。
【０００７】
【課題を解決するための手段】
本発明の特徴は、金属条材から打ち抜いたロータ用鉄心片を積層することにより、ロータ用積層鉄心を製造するステッピングモータ用積層鉄心の製造方法であって、極歯部側面と極歯部円周面との間の角部を含む極歯部側面、または上記角部を含む極歯部円周面の、一方の面をシェービング加工した後、他方の面に半抜きシェービング加工を行うことにある。
【００１０】
【発明の実施形態】
以下、本発明の実施形態について説明する。
【００１１】
本発明のステッピングモータ用積層鉄心の製造方法は、金属条材から打ち抜いたロータ用鉄心片を積層することにより、ロータ用積層鉄心を製造するステッピングモータ用積層鉄心の製造方法であって、極歯部側面と極歯部円周面との間の角部を含む極歯部側面、または上記角部を含む極歯部円周面の、一方の面をシェービング加工した後、他方の面に半抜きシェービング加工を行うことを特徴とするステッピングモータ用積層鉄心の製造方法である。
【００１２】
本実施形態によれば、極歯部側面および円周部をそれぞれ別々のパンチでシェービング加工することができるので、極歯部側面と円周部の間の角部を鋭角に形成できるため、極歯部円周面上の面積が広くなり、モータの特性を高めることができる。
【００１４】
また、この実施形態では、極歯部側面もしくは円周面の第１の面(一方の面)をシェービング加工した後、第２の面(他方の面)のシェービング加工において、シェービング代を残して下穴抜き領域を半抜きした後、下穴抜き領域を含む仕上げ抜き領域を打ち抜く半抜きシェービング加工を行う。
【００１５】
極歯部円周面と極歯部側面は角部で接しており、隣接する２面を別工程で打ち抜くために打ち抜き領域が重なるように打ち抜かねばならず、また、シェービング代は極めて小さいので、第２の面のシェービング加工における下穴を抜き領域と、第１の面の打ち抜きにおける打ち抜き領域が重なるため、第２の面のシェービング加工における仕上げ抜きにおいて、シェービング代形状もしくはシェービング代の一方の端部が他の部分と接続された形状の抜きカスが発生し、カス上がりの問題が生じるが、本実施形態では、第２の面のシェービング加工において、半抜きシェービング加工を用いるので、仕上げ抜きにおいて、抜きカスを大きくすることができ、カス上がりを防止することができる。
【００１７】
ステッピングモータのロータはその外周面全面に極歯部が形成されており、ロータ形成の最終工程でロータを打ち抜き、外周面を完成させ、積層するため、ロータ打ち抜き工程における全ての打ち抜きが、シェービング加工の仕上げ抜きを兼ねている場合、ロータ打ち抜き工程で仕上げ抜きが行われる全てのシェービング面の下穴抜きを、完全に行ってしまうと、ロータ打ち抜き工程の前の工程で、ロータが金属条材から切り放されてしまい、その後の工程を行うことができなくなってしまうが、本実施形態によれば、ロータ打ち抜き加工において仕上げ抜きが行われるシェービング面のうち少なくとも一面に半抜きシェービング加工を用いるので、半抜き部分においてロータと金属条材が連結され、ロータ打ち抜き工程の前の工程でロータが金属条材から切り放されることがない。
【００１８】
また、本実施形態は、ロータの極歯部側面および円周面の全てにシェービング加工を行うとき特に有効であり、その中でも、隣接する極歯部側面のシェービング加工における下穴抜き領域が接している場合、さらに有効である。
【００１９】
【実施例１】
以下本発明の実施例につき、図面を参照しつつ詳細に説明する。
【００３８】
本実施例では、順送り金型を用いたプレス加工を行い、金属条材からステッピングモータのロータ用鉄心片を打ち抜き、積層し、ロータ用積層鉄心を製造する方法であって、ロータ用鉄心片の極歯部の側面及び円周面をそれぞれ別工程でシェービング加工し、積層する製造方法において、極歯部円周面に、シェービング代を残して下穴抜きを行った後、下穴抜き領域の外周近傍領域を含むように仕上げ抜きを行うシェービング加工方法を用い、極歯部側面に半抜きシェービング加工を用いた例について説明する。
【００３９】
金属条材から、パイロット孔及び軸孔等を打ち抜き、その後、図３（ａ）に示すように、破線で示すロータ用鉄心片領域３１の極歯部円周面３２からシェービング代３３を残すように離間した下穴抜き領域３４を打ち抜く。
【００４０】
次に、図３（ｂ）に示すように、下穴抜き領域３４の外周近傍領域を含む仕上げ抜き領域３５を打ち抜き、極歯部円周面３２のシェービング加工を行う。
【００４１】
ここで、仕上げ抜き領域３５は、リング状となっているため、カス上がりを防止することができる。
【００４２】
次に、図３（ｃ）に示す、極歯部側面３６からシェービング代３７を残すように離間された下穴抜き領域３８が仕上げ抜きにおけるパンチ挿入面側に浮き上がるように半抜き加工を行う。
【００４３】
次に、図３（ｄ）に示すように、下穴抜き領域３８からシェービング代３７分離間したロータ用鉄心片３１を打ち抜き、積層してロータ用積層鉄心を製造する。
【００４４】
本実施例では、第２のシェービング加工として行われる極歯部側面３６の形成において、下穴抜き領域３８を半抜きしているため、下穴抜きにおいてロータ用鉄心片がが金属条材から切り放されることがなく、同一の金型内で仕上げ抜きを行うことができる。
【００４５】
【発明の効果】
以上の本発明のステッピングモータ用積層鉄心の製造方法によれば、極歯部側面および円周部をそれぞれ別々のパンチでシェービング加工することができるので、極歯部側面と円周部の間の角部を鋭角に形成できるため、極歯部円周面上の面積が広くなり、モータの特性を高めることができる。
【００４６】
また、極歯部側面と円周面の間の角部を含む極歯部側面または極歯部円周面の一方の面をシェービング加工した後、他方の面に半抜きシェービング加工を行うステッピングモータ用積層鉄心の製造方法によれば、後工程のシェービング加工において、半抜きシェービング加工を用いるので、仕上げ抜きにおいて、抜きカスを大きくすることができ、カス上がりを防止することができる。
【００４７】
また、極歯部側面と極歯部円周面との間の角部を含む極歯部側面、または上記角部を含む極歯部円周面の、一方の面をシェービング加工した後、他方の面に半抜きシェービング加工を行うステッピングモータ用積層鉄心の製造方法によれば、ロータ打ち抜き加工において仕上げ抜きが行われるシェービング面のうちの一方の面に半抜きシェービング加工を用いるので、半抜き部分において金属条材とロータ鉄心片とが連結され、ロータ打ち抜き工程の前の工程においてロータ鉄心片が金属条材から切り離されてしまうことがない。
【図面の簡単な説明】
【図１】本発明の実施例の打ち抜き工程の一部を示す図である。
【図２】従来の打ち抜き方法により形成される鉄心を示す図である。
【符号の説明】
１ 鉄心片
２ 角部
３１ 鉄心片
３２ 極歯部側面
３３ シェービング代
３４ 下穴抜き領域
３５ 仕上げ抜き領域
３６ 極歯部円周面
３７ シェービング代
３８ 下穴抜き領域
３９ 仕上げ抜き領域[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method of manufacturing a laminated iron core for a stepping motor in which iron core pieces are punched from a metal strip and laminated, and in particular, a stepping method in which shaving is performed on a pole tooth side surface and a pole tooth circumferential surface of a laminated iron core for a stepping motor rotor and laminated. The present invention relates to a method for manufacturing a laminated iron core for a motor.
[0002]
[Prior art]
Conventionally, laminated iron cores for rotors or stators of stepping motors are manufactured by punching and laminating iron core pieces from metal strips using a press die, but with conventional punching, sagging or broken parts are formed on the machined surface. As a result, sagging and breaks are formed on the side and circumferential surfaces of the pole teeth of the laminated core pieces.
[0003]
If sagging or broken portions are formed on the side surface and the circumferential surface of the pole teeth portion, the area of the circumferential surface of the rotor and the stator is reduced, and as a result, the characteristics of the motor are reduced.
[0004]
Therefore, a method using shaving processing has been proposed as a method of forming the side surface and the circumferential surface of the pole teeth portion.
[0005]
[Problems to be solved by the invention]
However, if the pole tooth side and the circumferential surface including the corner between the side surface and the circumferential surface of the pole tooth are formed in the same process, the corner between the side and the circumferential surface is formed at an acute angle. However, it is difficult to form a punch for punching an acute corner, and the corner 2 of the iron core piece 1 becomes round as shown in FIG. Was.
[0006]
The present invention has been made in view of the above problems, and in the manufacture of a laminated iron core for a rotor of a stepping motor, even if shaving is performed to form the side surface and the circumferential surface of the laminated core pole teeth portion, It is an object of the present invention to provide a method for manufacturing a laminated iron core for a stepping motor that can form an acute angle between a circumferential surface and a corner.
[0007]
[Means for Solving the Problems]
A feature of the present invention is a method of manufacturing a laminated iron core for a stepping motor in which a laminated iron core for a rotor is manufactured by laminating pieces of an iron core for a rotor punched from a metal strip. After shaving one side of the pole tooth side surface including the corner between the peripheral surface and the pole tooth circumferential surface including the corner, half shaving is performed on the other surface. is there.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described.
[0011]
The method for manufacturing a laminated core for a stepping motor according to the present invention is a method for producing a laminated core for a stepping motor in which a laminated core for a rotor is manufactured by laminating core pieces for a rotor punched from a metal strip. After shaving one side of a pole tooth side including a corner between the side surface and the pole tooth circumference, or a pole tooth circumference including the corner, a half is formed on the other side. A method for manufacturing a laminated iron core for a stepping motor, comprising performing punching shaving.
[0012]
According to the present embodiment, the pole tooth side surface and the circumferential portion can be shaved with separate punches, respectively, so that the corner between the pole tooth side surface and the circumferential portion can be formed at an acute angle. The area on the tooth circumferential surface is increased, and the characteristics of the motor can be improved.
[0014]
Further, in this embodiment, after shaving the first surface (one surface) of the pole tooth side surface or the circumferential surface, in the shaving process of the second surface (the other surface), leaving a shaving allowance. After half-punching the prepared hole area, a half-punched shaving process for punching out the finished punched area including the prepared hole area is performed.
[0015]
The circumferential surface of the pole teeth portion and the side surface of the pole teeth portion are in contact at the corners, and the two adjacent surfaces must be punched so that the punching areas overlap to punch in another process, and the shaving allowance is extremely small. In the shaving process of the second surface, the prepared hole in the shaving process is overlapped with the punched region in the punching of the first surface. In this embodiment, the half-cut shaving process is used in the shaving process of the second surface. In addition, the size of the scrap can be increased, and the scrap can be prevented from rising.
[0017]
The rotor of the stepping motor has pole teeth formed on the entire outer peripheral surface. In the final step of forming the rotor, the rotor is punched, and the outer peripheral surface is completed and laminated. In the process before the rotor punching process, the rotor is removed from the metal strip in the process before the rotor punching process. Although it will be cut off, it will not be possible to perform the subsequent steps, but according to this embodiment, since half punching shaving processing is used on at least one of the shaving surfaces on which finish punching is performed in rotor punching processing, The rotor and the metal strip are connected at the half-punched portion, and the rotor is It is not be split off from the metal strip material.
[0018]
Further, the present embodiment is particularly effective when shaving is performed on all of the pole teeth side surfaces and the circumferential surface of the rotor. If it is, it is more effective.
[0019]
Embodiment 1
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0038]
In the present embodiment, a press working using a progressive die is performed, and a core piece for a rotor of a stepping motor is punched from a metal strip and laminated, and a method for manufacturing a laminated core for a rotor is provided. In the manufacturing method in which the side surface and the circumferential surface of the pole tooth portion are each subjected to shaving processing in different processes and laminated, in the pole tooth portion circumferential surface, after preparing a pre-drilled hole while leaving a shaving allowance, the prepared hole is removed. A description will be given of an example in which a shaving processing method for performing finish punching so as to include a region near the outer periphery is used, and a half punching shaving process is used on the side surfaces of the pole teeth.
[0039]
A pilot hole and a shaft hole are punched out of the metal strip material, and thereafter, as shown in FIG. 3A, a shaving allowance 33 is left from a pole tooth circumferential surface 32 of a rotor
[0040]
Next, as shown in FIG. 3B, a finished punching area 35 including an area near the outer periphery of the pilot
[0041]
Here, since the finished area 35 has a ring shape, it is possible to prevent the scrap from rising.
[0042]
Next, half-punching is performed so that the prepared hole-punched
[0043]
Next, as shown in FIG. 3D, the
[0044]
In the present embodiment, in forming the pole tooth side surface 36 performed as the second shaving process, since the prepared
[0045]
【The invention's effect】
According to the method of manufacturing a laminated iron core for a stepping motor of the present invention, the side surface and the circumferential portion of the pole teeth can be shaved with separate punches. Since the corners can be formed at an acute angle, the area on the circumferential surface of the pole teeth portion is increased, and the characteristics of the motor can be improved.
[0046]
In addition, after shaving one side of the pole tooth side surface or the pole tooth circumferential surface including the corner between the pole tooth side surface and the circumferential surface, a stepping motor that performs half punching shaving processing on the other surface. According to the manufacturing method of the laminated iron core for use, since the half shaving process is used in the shaving process in the subsequent step, it is possible to increase the size of the shavings in the finish shaping and prevent the shavings from rising.
[0047]
Also, after shaving one side of the pole tooth side including the corner between the pole tooth side and the pole tooth circumferential surface, or the pole tooth circumferential including the corner, the other is used. According to the method of manufacturing a laminated iron core for a stepping motor in which a half-cut shaving process is performed on a surface of a half-cut portion, a half-cut shaving process is used on one of the shaving surfaces on which finish punching is performed in a rotor punching process. In the above, the metal strip is connected to the rotor core piece, and the rotor core piece is not separated from the metal strip in a step before the rotor punching step.
[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 an iron core formed by a conventional punching method.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 iron core piece 2
Claims (1)
極歯部側面と極歯部円周面との間の角部を含む極歯部側面、または上記角部を含む極歯部円周面の、一方の面をシェービング加工した後、他方の面に半抜きシェービング加工を行うことを特徴とするステッピングモータ用積層鉄心の製造方法。A method of manufacturing a laminated iron core for a stepping motor, by manufacturing laminated iron cores for a rotor by laminating core pieces for a rotor punched from a metal strip,
After shaving one side of the pole tooth side surface including a corner between the pole tooth side surface and the pole tooth circumferential surface, or the pole tooth portion circumferential surface including the corner, the other surface A method for manufacturing a laminated iron core for a stepping motor, comprising performing a half-blanking shaving process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06445098A JP3544117B2 (en) | 1998-02-27 | 1998-02-27 | Manufacturing method of laminated iron core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP06445098A JP3544117B2 (en) | 1998-02-27 | 1998-02-27 | Manufacturing method of laminated iron core |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11252871A JPH11252871A (en) | 1999-09-17 |
| JP3544117B2 true JP3544117B2 (en) | 2004-07-21 |
Family
ID=13258611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP06445098A Expired - Fee Related JP3544117B2 (en) | 1998-02-27 | 1998-02-27 | Manufacturing method of laminated iron core |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3544117B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5462675B2 (en) * | 2010-03-17 | 2014-04-02 | 株式会社三井ハイテック | Manufacturing method of laminated iron core |
-
1998
- 1998-02-27 JP JP06445098A patent/JP3544117B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11252871A (en) | 1999-09-17 |
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