JPH0624421B2 - Yoke manufacturing method - Google Patents
Yoke manufacturing methodInfo
- Publication number
- JPH0624421B2 JPH0624421B2 JP16555885A JP16555885A JPH0624421B2 JP H0624421 B2 JPH0624421 B2 JP H0624421B2 JP 16555885 A JP16555885 A JP 16555885A JP 16555885 A JP16555885 A JP 16555885A JP H0624421 B2 JPH0624421 B2 JP H0624421B2
- Authority
- JP
- Japan
- Prior art keywords
- magnetic
- yoke
- pole plate
- magnetic pole
- view
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は粉体または流体を磁場中で加工することにより
形成されるヨークの製造方法に関する。Description: TECHNICAL FIELD The present invention relates to a method for manufacturing a yoke formed by processing powder or fluid in a magnetic field.
従来、ヨークは高透磁性のある材料を採用しているが、
性能上よりみた時、漏洩磁束を発生させるローター中心
軸を通る漏洩磁束発生位置のみを低透磁性に保つために
その形状には種々工夫がなされている。Conventionally, the yoke uses a material with high magnetic permeability,
In terms of performance, various shapes have been devised in order to maintain low magnetic permeability only at the position of the leakage magnetic flux generation that passes through the rotor central axis that generates the leakage magnetic flux.
第４図(A)は従来より一般的に使用されているヨークの
平面図、第４図(B)はその正面図である。FIG. 4 (A) is a plan view of a yoke generally used conventionally, and FIG. 4 (B) is a front view thereof.
第４図において、プレス抜されたヨーク体１とヨーク支
持板２とは溶接等で結合された後、高透磁性体であるヨ
ーク体１のローター中心軸を通る漏洩磁束発生位置をフ
ライスカッター等で切削し、スリット３を形成すること
により該スリット３部分を低透磁性に保っている。In FIG. 4, after the pressed yoke body 1 and the yoke support plate 2 are joined by welding or the like, the leakage magnetic flux generation position passing through the center axis of the rotor of the yoke body 1 which is a highly magnetically permeable body is determined by a milling cutter or the like. The slit 3 is cut to form the slit 3 so that the portion of the slit 3 has a low magnetic permeability.
しかし本方式は、ヨーク１個当りのスリット部の切削時
間が1.5〜２秒を要し、工数大となってしまう他にヨー
ク体１とヨーク支持板２との溶接も溶接強度不足等加工
安定性が悪く、歩留を下げる等コストアップとなってい
る。However, this method requires 1.5 to 2 seconds for cutting the slit portion per one yoke, which requires a lot of man-hours, and the welding of the yoke body 1 and the yoke support plate 2 is stable due to insufficient welding strength. Poor performance, resulting in higher costs such as lower yield.
また近年時計の小型化・薄型化が促進されるに至り、部
品も更に小型化・薄型化され、ヨークにおいてもヨーク
支持板２の撤去が要望されている。In recent years, the miniaturization and thinning of timepieces have been promoted, and the parts have been further miniaturized and thinned, and the yoke support plate 2 has been demanded to be removed also from the yoke.
第５図(A)は第４図と異った従来例のヨーク平面図、第
５図(B)はその正面図を示す。FIG. 5 (A) is a plan view of a conventional yoke different from FIG. 4, and FIG. 5 (B) is a front view thereof.
第５図においてプレス抜されたヨーク体４はローター中
心軸を通る漏洩磁束発生位置のスリット部４ａに低透磁
性部材５を挿入し、しかる後に溶接等で結合して完成ヨ
ークを形成している。In the yoke body 4 stamped out in FIG. 5, the low magnetic permeability member 5 is inserted into the slit portion 4a at the leakage magnetic flux generation position passing through the rotor central axis, and then joined by welding or the like to form a completed yoke. .
しかし本方式も第４図に示す従来技術の如くスリット部
４ａの切削に時間を費し工数大となっており、また低透
磁性部材５のヨーク体４への挿入及び溶接等も加工安定
性が悪く、コストアップとなっている。However, this method also requires a lot of man-hours for cutting the slit portion 4a as in the prior art shown in FIG. 4, and the stability of the insertion of the low magnetic permeability member 5 into the yoke body 4 and welding are stable. Is bad, and the cost is increasing.
従来の加工方法によれば、前述の如くスリット部の形成
等を切削加工に頼らざるを得ず、工数大となっており更
にヨーク体とヨーク支持板との結合で厚みを増加し、ス
リット部への別部材挿入及び結合等での加工安定性が悪
く製造コストアップとなっている。According to the conventional processing method, as described above, there is no choice but to rely on cutting for forming the slit portion and the like, which requires a lot of man-hours, and further increases the thickness by coupling the yoke body and the yoke support plate. The manufacturing stability is poor due to the insertion and connection of another member to the assembly, resulting in an increase in manufacturing cost.
本発明は以上のような問題点を解消させ、切削加工によ
るスリットの形成を行なうことなく、また別部材の挿入
・結合等も行なわず粉体または流体の成形加工を採用す
ることにより従来の加工に比較してより安価で安定性の
あるヨーク製造を行なうことを目的とする。The present invention solves the above problems and adopts a powder or fluid forming process without forming a slit by cutting and without inserting or joining another member. It is an object of the present invention to manufacture a cheaper and more stable yoke as compared with
上記の目的を達成させるために本発明は次のような構成
としている。In order to achieve the above object, the present invention has the following configuration.
すなわち磁性体粒子を粉体または流体に分散させた後、
磁極板を用いて磁場を発生させ成形前または成形中に粉
体または流体を再配列し、ヨーク体の漏洩磁束発生位置
を低透磁性体にすると共にその他の部分を高透磁性体に
分布させたヨークを製造する。That is, after dispersing magnetic particles in powder or fluid,
A magnetic field is generated using a magnetic pole plate to rearrange the powder or fluid before or during molding to make the leakage flux generation position of the yoke body low magnetic permeability and distribute other parts to high magnetic permeability. Manufacture a yoke.
以下本発明の実施例を図面に基づき詳述する。第１図は
本発明により形成された完成ヨークの平面図を示す。Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 shows a plan view of a finished yoke formed according to the present invention.
第１図においてヨーク７はセラミックや合成樹脂等の非
磁性材料のバインダー１５に磁性体粒子２０を分散させ
た成形体を形成し、狭小部１６以外に磁場をかけた状態
で固化することにより、ローター穴９の中心を通り漏洩
磁束を発生させる位置である狭小部１６には磁性体粒子
２０を極低密度に、他の部分には磁性体粒子２０を高密
度に分布させて構成したものである。１０、１１は成形
時や時計への組込時にヨーク７をセットしたりガイドし
たりするガイド穴である。In FIG. 1, a yoke 7 is formed into a molded body in which magnetic particles 20 are dispersed in a binder 15 made of a non-magnetic material such as ceramic or synthetic resin, and solidified in a state in which a magnetic field is applied to areas other than the narrow portion 16, The magnetic particles 20 are distributed in a very low density in the narrow portion 16 where the leakage magnetic flux is generated through the center of the rotor hole 9, and the magnetic particles 20 are distributed in a high density in the other portions. is there. Reference numerals 10 and 11 are guide holes for setting and guiding the yoke 7 at the time of molding or assembling into the timepiece.
第２図は本発明で用いる磁極板の具体例を示すもので、
第２図(A)は上磁極板、(B)は下磁極板の各断面図を示
す。同図において下磁極板６には第１図に示すヨーク７
の外形形状と同一形状になる彫込み８が施されており更
にヨーク７のローター穴９、ガイド穴１０、１１それぞ
れの相当位置に各々同形状なる突起１２、１３、１４が
配列されている。FIG. 2 shows a specific example of the magnetic pole plate used in the present invention.
2 (A) is a sectional view of the upper magnetic pole plate, and FIG. 2 (B) is a sectional view of the lower magnetic pole plate. In the figure, the lower pole plate 6 has a yoke 7 shown in FIG.
Engraving 8 having the same outer shape as that of the above is formed, and projections 12, 13 and 14 having the same shape are arranged at corresponding positions of the rotor hole 9 and the guide holes 10 and 11 of the yoke 7, respectively.
この下磁極板６及び突起１２、１３、１４の材質は残留
磁気が生じないものが好ましく、軟鉄が良い。また下磁
極板６にはヨーク７の狭小部１６相当位置に各々同形状
なる非磁性物１７が埋め込まれておりこれは成形時狭小
部１６の磁性体粒子２０の密度を極めて低くするための
ものである。次に上磁極板１８も材質は軟鉄が好まし
く、更にヨーク７の狭小部１６相当位置に各々同形状な
る非磁性物１９が埋め込まれている。The material of the lower magnetic pole plate 6 and the protrusions 12, 13, 14 is preferably one that does not cause remanence, and is preferably soft iron. The lower magnetic pole plate 6 has nonmagnetic materials 17 of the same shape embedded at positions corresponding to the narrow portions 16 of the yoke 7. This is for making the density of the magnetic particles 20 in the narrow portions 16 extremely low during molding. Is. Next, the material of the upper magnetic pole plate 18 is also preferably soft iron, and a non-magnetic material 19 having the same shape is embedded at a position corresponding to the narrow portion 16 of the yoke 7.
この磁極板６、１８を用いてヨークを製造するには、第
３図に示すように下磁極板６の彫込み部８に、磁性体粒
子２０をセラミック粉体または合成樹脂粉体または流体
より成るバインダー１５に分散させた磁性体粒子混合物
２２を流入して成形体を形成した後、上磁極板１８と下
磁極板６とを密着させて、成形前または成形中に上及び
下磁極板６、１８の外面に線２３を巻いた電磁石２１を
当てて、磁極板を介して磁性体粒子混合物２２に略直角
方向に磁場を作用させてから、成形体を固化させる。In order to manufacture a yoke using these magnetic pole plates 6 and 18, magnetic particles 20 are made of ceramic powder or synthetic resin powder or fluid in the engraved portion 8 of the lower magnetic pole plate 6 as shown in FIG. After the magnetic particle mixture 22 dispersed in the binder 15 is formed to form a molded body, the upper magnetic pole plate 18 and the lower magnetic pole plate 6 are brought into close contact with each other to form the upper and lower magnetic pole plates 6 before or during molding. , 18 is applied with an electromagnet 21 wound with a wire 23, a magnetic field is applied to the magnetic particle mixture 22 through the magnetic pole plate in a direction substantially at a right angle, and then the molded body is solidified.
この結果磁性体粒子混合物２２は非磁性物１７相当部分
のみ非磁性体であるバインダー１５が多く磁性体粒子２
０の粗なる部分として形成され、それ以外の部分は磁性
体粒子２０の密なる部分として形成され、全体として磁
性体から成るヨーク（第１図に図示）が製作される。As a result, the magnetic substance particle mixture 22 contains a large amount of the binder 15 which is a non-magnetic substance only in the portion corresponding to the non-magnetic substance 17.
0 is formed as a rough portion, and the other portion is formed as a dense portion of the magnetic particles 20, and a yoke (shown in FIG. 1) made of a magnetic material as a whole is manufactured.
以上の説明したところより明らかな如く、本発明は磁性
体粒子混合物を磁極板内に流入し磁場を作用させること
だけでヨークを形成することが出来、従来のようにプレ
ス抜されたヨーク体とヨーク支持板とを不安定な溶接を
したり、フライスカッターで時間を費して切削したりす
ることなく短時間で加工が可能となり、大巾なコストダ
ウンが図れた。As is clear from the above description, according to the present invention, the yoke can be formed only by flowing the magnetic substance particle mixture into the magnetic pole plate and applying a magnetic field, and a yoke body press-pressed as in the conventional case is used. It was possible to process in a short time without unstable welding with the yoke support plate or cutting with a milling cutter, which resulted in a significant cost reduction.
またフライスカッターでの切削後のスリット部への低透
磁性部材挿入及び溶接の不安定さも解消され大幅なコス
トダウン効果を来した。In addition, the insertion of low-permeability members into the slit after cutting with a milling cutter and the instability of welding were eliminated, resulting in a significant cost reduction effect.
第１図は本発明により形成された完成ヨークの平面図、
第２図は本発明で用いる磁極板の断面図で、第２図(A)
は上磁極板、第２図(B)は下磁極板を示す。第３図はヨ
ークの製造方法を示す断面図、第４図(A)は従来のヨー
クの平面図、第４図(B)はその正面図、第５図(A)は従来
のヨークの平面図、第５図(B)はその正面図を示す。 １、４……ヨーク体、２……ヨーク支持板、 ３……スリット、５……低透磁性部材、 ６……下磁極板、７……ヨーク、８……彫込み、 ９……ローター穴、１０、１１……ガイド穴、 １２、１３、１４……突起、 １５……バインダー、１６……狭小部、 １７、１９……非磁性物、１８……上磁極板、 ２０……磁性体粒子、２１……電磁石、 ２２……磁性体粒子混合物。FIG. 1 is a plan view of a completed yoke formed by the present invention,
FIG. 2 is a sectional view of the magnetic pole plate used in the present invention, and FIG.
Shows the upper magnetic pole plate, and FIG. 2 (B) shows the lower magnetic pole plate. FIG. 3 is a sectional view showing a method for manufacturing a yoke, FIG. 4 (A) is a plan view of a conventional yoke, FIG. 4 (B) is a front view thereof, and FIG. 5 (A) is a plan view of a conventional yoke. FIG. 5 (B) shows the front view. 1, 4 ... Yoke body, 2 ... Yoke support plate, 3 ... Slit, 5 ... Low magnetic permeability member, 6 ... Lower magnetic pole plate, 7 ... Yoke, 8 ... Engraving, 9 ... Rotor Hole, 10, 11 ... Guide hole, 12, 13, 14 ... Protrusion, 15 ... Binder, 16 ... Narrow part, 17, 19 ... Non-magnetic material, 18 ... Upper magnetic pole plate, 20 ... Magnetic Body particles, 21 ... Electromagnet, 22 ... Mixture of magnetic particles.
Claims (1)
磁気抵抗を形成するための狭小部とを備えたモータのヨ
ークの製造方法において、磁性体粒子を非磁性材料の粉
体または流体中に分散させてヨーク形状の成形体を形成
し、前記狭小部に対応する位置に非磁性体を、他の位置
に磁性体を対応させた磁極板上に成形体をセットし、該
磁極板に前記成形体に垂直な磁界を与えて前記磁性体粒
子を再配列させた後前記非磁性材料の粉体または流体を
固化することによって、前記成形体の狭小部には前記磁
性体粒子を低密度に、他の部分には前記磁性体粒子を高
密度に分布させてヨーク体を形成したことを特徴とする
ヨークの製造方法。1. A method of manufacturing a motor yoke having a rotor hole and a narrow portion having one end in the rotor hole for forming a magnetic resistance, wherein magnetic particles are non-magnetic powder or fluid. A yoke-shaped molded body is dispersed therein, and the molded body is set on a magnetic pole plate in which a non-magnetic body is made to correspond to the narrow portion and a magnetic body is made to correspond to other positions. The magnetic particles are rearranged by applying a perpendicular magnetic field to the compact and then the powder or fluid of the non-magnetic material is solidified to reduce the magnetic particles to a narrow portion of the compact. A method for manufacturing a yoke, characterized in that a yoke body is formed by distributing the magnetic particles at a high density in other portions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16555885A JPH0624421B2 (en) | 1985-07-26 | 1985-07-26 | Yoke manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16555885A JPH0624421B2 (en) | 1985-07-26 | 1985-07-26 | Yoke manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6225863A JPS6225863A (en) | 1987-02-03 |
| JPH0624421B2 true JPH0624421B2 (en) | 1994-03-30 |
Family
ID=15814641
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16555885A Expired - Lifetime JPH0624421B2 (en) | 1985-07-26 | 1985-07-26 | Yoke manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0624421B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6143094A (en) * | 1996-04-26 | 2000-11-07 | Denso Corporation | Method of stress inducing transformation of austenite stainless steel and method of producing composite magnetic members |
| JP5854448B1 (en) * | 2015-08-25 | 2016-02-09 | 則雄 宮内 | Step motor processing method |
-
1985
- 1985-07-26 JP JP16555885A patent/JPH0624421B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6225863A (en) | 1987-02-03 |
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