JPS6196693A - Magnetic flux concentrator for electromagnetic molding - Google Patents
Magnetic flux concentrator for electromagnetic moldingInfo
- Publication number
- JPS6196693A JPS6196693A JP21799484A JP21799484A JPS6196693A JP S6196693 A JPS6196693 A JP S6196693A JP 21799484 A JP21799484 A JP 21799484A JP 21799484 A JP21799484 A JP 21799484A JP S6196693 A JPS6196693 A JP S6196693A
- Authority
- JP
- Japan
- Prior art keywords
- magnetic flux
- flux concentrator
- coil
- hole
- holes
- 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.)
- Granted
Links
Landscapes
- General Induction Heating (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
（イ）発明の目的
［産業上の利用分野］
この発明は電磁成形装置、特に、被加工材である管材の
縮管、拡管若しくは組立をする場合に使用する電磁成形
用磁束集中器に関するものである。Detailed Description of the Invention (a) Purpose of the Invention [Field of Industrial Application] This invention relates to an electromagnetic forming apparatus, particularly an electromagnetic forming apparatus used for shrinking, expanding, or assembling a pipe material as a workpiece. The present invention relates to magnetic flux concentrators for use.
電磁成形加工法の原理は次の通りである。すなわち、成
形用コイルに衝撃大電流が流れると、その成形用コイル
の周りに磁界が生じる。磁界の強さが変化すると、その
磁界の中に置かれた被加工体である管材に電流が誘導さ
れる。そして、この誘導電流の方向は、磁界の変化を防
ぐ方向に流れる。これら２つの磁界の交互作用で、管材
は成形用コイルから大きな反発力を受け、成形が行われ
る。このとき、このような強力な電磁成形力を管材の必
要な箇所に集中して作用させるために、コイルと管材と
の間に磁束集中器を使用する。The principle of the electromagnetic forming method is as follows. That is, when a large impact current flows through a shaping coil, a magnetic field is generated around the shaping coil. When the strength of the magnetic field changes, an electric current is induced in the workpiece (tube) placed within the magnetic field. The direction of this induced current flows in a direction that prevents changes in the magnetic field. Due to the interaction of these two magnetic fields, the tube material receives a large repulsive force from the forming coil, and forming is performed. At this time, a magnetic flux concentrator is used between the coil and the tube in order to concentrate such a strong electromagnetic forming force on the necessary parts of the tube.
［従来の技術］
従来の磁束集中器１は、例えば第５図及び第６図に示す
ように、ソレノイド状の成形用コイル２の内側または外
側に、それど同心状に配置され、かつ、軸方向に穴３を
有し、この穴３内に被加工材である管材４が配置される
。また、磁束集中器１には外周面から穴３に達するスリ
ット５が形成されており、このスリット５を介して、穴
３の表面層６と磁束集中器１の成形用コイル２と対向す
る外周表面７とが連続している。したがって誘導電流は
磁束集中器１の表面を矢印のように流れる。[Prior Art] As shown in FIGS. 5 and 6, for example, a conventional magnetic flux concentrator 1 is arranged concentrically inside or outside a solenoid-shaped forming coil 2, and has an axis. It has a hole 3 in the direction, and a tube material 4, which is a workpiece, is placed inside this hole 3. In addition, a slit 5 is formed in the magnetic flux concentrator 1 and reaches the hole 3 from the outer peripheral surface, and through this slit 5, a surface layer 6 of the hole 3 and the outer periphery facing the forming coil 2 of the magnetic flux concentrator 1 are formed. The surface 7 is continuous. Therefore, the induced current flows on the surface of the magnetic flux concentrator 1 as shown by the arrow.
［発明が解決しようとする問題点］
しかるに、このような構成の磁束集中器では１麿の放電
で１個の管材しか加工することができず、生産性が低い
。また、誘導電流が流れる経路のうち、スリット５の表
面層が占める割合が大きく、効率（仕事／充電エネルギ
）が低い。[Problems to be Solved by the Invention] However, with the magnetic flux concentrator having such a configuration, only one tube material can be processed in one discharge, resulting in low productivity. Furthermore, the surface layer of the slit 5 occupies a large proportion of the path through which the induced current flows, resulting in low efficiency (work/charging energy).
このようなことから、生産性が高く、かつ高効率の磁束
集中器の開発が望まれている。For these reasons, there is a desire to develop a highly productive and highly efficient magnetic flux concentrator.
この発明は上記の如き事情に鑑みてなされたものであっ
て、生産性が高く、かつ高効率の磁束集中器を提供する
ことを目的とするものである。This invention was made in view of the above circumstances, and an object of the invention is to provide a magnetic flux concentrator with high productivity and high efficiency.
（ロ）発明の構成
［問題を解決するための手段］
この目的に対応して、この発明の電磁成形用磁束集中器
は、電磁成形用コイルの内側若しくは外３
側において前記電磁成形用コイルと対向して配置され
る磁束集中器であって、被加工体を配置し得る穴を軸方
向に複数個設け、それぞれの前記穴の表面層をスリット
によって前記磁束集中器の前記電磁成形用コイルと対向
する側の表面層と連続させてなることを特徴としている
。(B) Structure of the Invention [Means for Solving the Problem] Corresponding to this object, the magnetic flux concentrator for electromagnetic forming of the present invention provides a magnetic flux concentrator for electromagnetic forming that
A magnetic flux concentrator disposed facing the electromagnetic forming coil on the side, a plurality of holes in which a workpiece can be placed are provided in the axial direction, and the surface layer of each hole is formed with a slit to concentrate the magnetic flux. It is characterized in that it is continuous with the surface layer on the side of the container facing the electromagnetic forming coil.
以下、この発明の詳細を一実施例を示す図面について説
明する。Hereinafter, details of the present invention will be explained with reference to the drawings showing one embodiment.
第１図及び第２図において１１は磁束束中器である。磁
束集中器１１は硬度が大きくて電導性のよい＋Ｊ １３
＋、例えば０ｒ−Ｃｕ合金等で構成される。In FIGS. 1 and 2, 11 is a magnetic flux intermediate. The magnetic flux concentrator 11 has high hardness and good conductivity +J 13
+, for example, made of an 0r-Cu alloy.
この磁束集中器１１は略円柱状をなし、成形用コイル１
２ａと同心状をなして、第１図では成形用コイル１２ａ
内に、また第３図では成形用コイルの外に配置されるも
めである。軸方向の長さについては、コイル、磁束集中
器及び管材について任意の組合せが考えられる。磁束集
中器１１には複数個〈この実施例では４個）の穴１３ａ
〜１３ｄが形成されてる。この穴１３ａ〜１３ｄは被加
工体である管材１４を配置するためのものである。This magnetic flux concentrator 11 has a substantially cylindrical shape, and the forming coil 1
In FIG. 1, the forming coil 12a is concentric with 2a.
The molding coil is placed inside, and in FIG. 3 outside of the forming coil. Regarding the axial length, any combination of coil, flux concentrator and tubing is possible. The magnetic flux concentrator 11 has a plurality of (four in this embodiment) holes 13a.
~13d is formed. These holes 13a to 13d are for arranging a tube material 14, which is a workpiece.
それぞれの穴１３ａ〜１３ｄに対応してスリット１５ａ
〜１５ｄが穴１３ａ 〜１３ｄの軸方向の全長にわたっ
て形成されており、したがって、各穴１３８〜１３（Ｉ
の表面Ｉ＠１６はスリット１５８〜１５ｄの表面層を介
して磁束集中器１１の成形用コイル１２ａと対向してい
る外周表面１７と連続している。Slits 15a correspond to the respective holes 13a to 13d.
-15d are formed over the entire axial length of holes 13a-13d, and therefore each hole 138-13 (I
The surface I@16 is continuous with the outer peripheral surface 17 facing the forming coil 12a of the magnetic flux concentrator 11 via the surface layer of the slits 158 to 15d.
［作 用］
このように構成された磁束集中器１１においては、これ
を成形用コイル１２ａの内側にセットし、かつ各穴１３
ａ〜１３ｄ内に管材１４を配置した状態で、成形用コイ
ル１２ａを通して大電流の通電を行うと、磁束集中器１
１の外側の表層部、すなわち、成形用コイル１２ａと対
向する外周表面１７に沿って誘導電流が流れ、さらにス
リット１５ａ〜１５ｄの表面に沿って、穴１３ａ〜１３
ｄの表面層１６に流れる。この電流は管材１４の表面層
に逆方向の電流を誘導し、管材１４に流れる電流と磁束
集中器１１に流れる電流の反発作用で、穴１３ａ〜１３
ｄにセットされている４本の管材１４が同時に加工を受
ける。[Function] In the magnetic flux concentrator 11 configured in this way, it is set inside the forming coil 12a, and each hole 13
When a large current is applied through the forming coil 12a with the tube material 14 arranged in the areas a to 13d, the magnetic flux concentrator 1
An induced current flows along the outer peripheral surface 17 facing the forming coil 12a, and further flows along the surface of the slits 15a to 15d, through the holes 13a to 13.
d flows to the surface layer 16. This current induces a current in the opposite direction in the surface layer of the tube material 14, and due to the repulsion between the current flowing in the tube material 14 and the current flowing in the magnetic flux concentrator 11, holes 13a to 13
The four pipe materials 14 set at point d are processed simultaneously.
［実施例］
外径 １００ｍｍ
軸方向長さ ５０ｍｍ
穴の直径 ２７１＋１１１
穴の数 ４個
材料 ０ｒ−Ｃｕ合金
の磁束集中器１１を作成し、各穴１３ａ〜１３ｄにおけ
る磁束密、度を測定した。[Example] Outer diameter: 100 mm Axial length: 50 mm Hole diameter: 271+111 Number of holes: 4 Materials A magnetic flux concentrator 11 made of an 0r-Cu alloy was created, and the magnetic flux density and degree in each hole 13a to 13d were measured.
この結果、第５図及び第６図に示す磁束集中器１におけ
る中央部の１個の穴３における磁束密度を１としたとき
、磁束集中器１１の各穴１３ａ〜１３ｄにおける磁束密
度は３／４となり、各穴１３ａ〜１３ｄにおいて管材の
同時加工が可能であることが明らかとなった。As a result, when the magnetic flux density in one hole 3 at the center of the magnetic flux concentrator 1 shown in FIGS. 5 and 6 is set to 1, the magnetic flux density in each hole 13a to 13d of the magnetic flux concentrator 11 is 3/ 4, and it became clear that simultaneous machining of the tube material was possible in each of the holes 13a to 13d.
［他の実施例］
第３図及び第４図はこの発明の他の実施例に係る磁束集
中器１１ｂが示されている。この磁束集中器１１ｂは成
形コイルの外側に配置して使用する場合のものである。[Other Embodiments] FIGS. 3 and 4 show a magnetic flux concentrator 11b according to another embodiment of the present invention. This magnetic flux concentrator 11b is used by being placed outside the forming coil.
すなわち、磁束集中器１１ｂは中心部に軸方向に貫通す
るコイル収納用のコイル穴１０が形成されており、この
コイル穴１０を成形用コイル１２ｂが挿通する。コイル
穴１０の周囲において、穴１３ａ〜１３ｄが軸方向に貫
通形成される。この穴１３ａ〜１３ｄは被加工体である
管材１４を配置するためのものである。That is, the magnetic flux concentrator 11b has a coil hole 10 for accommodating the coil formed in the center thereof, passing through the magnetic flux concentrator 11b in the axial direction, and the forming coil 12b is inserted through this coil hole 10. Holes 13a to 13d are formed to penetrate in the axial direction around the coil hole 10. These holes 13a to 13d are for arranging a tube material 14, which is a workpiece.
それぞれの穴１３ａ〜１３ｄとコイル穴１０との間にス
リン１〜１５ａ〜１５ｄが形成されており、したがって
、各穴１３ａ〜１３ｄの表面層１６はスリット１５ａ〜
１５ｄの表面層を介して成形用コイル１２ｂと対向して
いるコイル穴１０の表面！Ｆｉ１７ｂと連続している。Surins 1 to 15a to 15d are formed between each of the holes 13a to 13d and the coil hole 10, and therefore the surface layer 16 of each of the holes 13a to 13d is formed by the slits 15a to 15d.
The surface of the coil hole 10 facing the forming coil 12b through the surface layer 15d! It is continuous with Fi17b.
このような構成の磁束集中器１１ｂにおいては、成形用
コイル１２ｂを通して大電流の通電を行うと、磁束集中
器１１ｂの穴１３ａ〜１３ｂの表面層 １６及び管材１
４に電流が誘起され、４本の管材１４を同時に加工する
ことができる。In the magnetic flux concentrator 11b having such a configuration, when a large current is applied through the forming coil 12b, the surface layer 16 of the holes 13a to 13b of the magnetic flux concentrator 11b and the tube material 1
A current is induced in the pipe 4, and four pipe materials 14 can be processed simultaneously.
（ハ）発明の効果
： 以上の説明か明らかな通り、磁束集
中器に管材をセットする複数の穴を設けることにより、
複数の管材の縮管または組立の加工を同時に行うことが
でき、生産性を向上させることができる。また複数の穴
を設ける結果、磁束集中器における電流の通路が長くな
り、磁束集中器と成形用コイル間の反発力が弱くなり、
成形用コイルの破損を防ぐことができる。しかも、従来
のように長いスリットが形成されることがなく、実験例
で示した如く、各穴における磁束密度の低下は比較的小
さく、全体として（仕事／充電エネルギ）の値が大きく
なり、高効率を達成することができる。しかも穴１４ａ
〜１４ｄの横断面形状及び軸方向の形状を種々に選択す
ることによって、管材に任意の形状の加工をすることが
できる。(c) Effects of the invention: As is clear from the above explanation, by providing a plurality of holes for setting the tube material in the magnetic flux concentrator,
It is possible to shrink or assemble a plurality of tube materials at the same time, and productivity can be improved. In addition, as a result of providing multiple holes, the current path in the magnetic flux concentrator becomes longer, and the repulsive force between the magnetic flux concentrator and the forming coil becomes weaker.
This can prevent damage to the molding coil. Moreover, unlike the conventional method, long slits are not formed, and as shown in the experimental example, the decrease in magnetic flux density in each hole is relatively small, and the value of (work/charge energy) increases as a whole. Efficiency can be achieved. Moreover, hole 14a
By selecting various cross-sectional shapes and axial shapes of 14d to 14d, it is possible to process the tube material into any desired shape.
第１図は磁束集中器の平面説明図、第２図は第１図にお
ける■−■部断面断面図３図は他の磁束集中器の平面説
明図、第４図は第３図における■−■部所面図、第５図
は従来の磁束集中器の平面説明図、及び第６図は第５図
におけるＶｌ−ＶＴ部断面説明図である。
１・・・磁束集中器 ２・・・成形用コイル ３・
・・穴４・・・管材 ５・・・スリット ６・・・
表面層７・・・外周表面 １０・・・コイル穴 １
１ａ・・・磁束集中器 １１ｂ・・・磁束集中器
１２ａ。
１２ｈ・・・成形用コイル １３ａ〜１３ｄ・・・穴
１４・・・管材 １５ａ〜１５ｄ・・・スリット１６
・・・表面層 １７・・・外周表面第１図Fig. 1 is an explanatory plan view of the magnetic flux concentrator, Fig. 2 is a sectional view taken along the line ■-■ in Fig. 1, and Fig. 3 is an explanatory plan view of another magnetic flux concentrator. (2) A partial plan view, FIG. 5 is an explanatory plan view of a conventional magnetic flux concentrator, and FIG. 6 is an explanatory cross-sectional view of the Vl-VT portion in FIG. 5. 1... Magnetic flux concentrator 2... Coil for forming 3.
... Hole 4 ... Pipe material 5 ... Slit 6 ...
Surface layer 7... Outer surface 10... Coil hole 1
1a...Magnetic flux concentrator 11b...Magnetic flux concentrator
12a. 12h... Molding coil 13a-13d... Hole 14... Tube material 15a-15d... Slit 16
...Surface layer 17...Outer peripheral surface Fig. 1
Claims (1)
成形用コイルと対向して配置される磁束集中器であって
、被加工体を配置し得る穴を軸方向に複数個設け、それ
ぞれの前記穴の表面層をスリットによって前記磁束集中
器の前記電磁成形用コイルと対向する側の表面層と連続
させてなることを特徴とする電磁成形用磁束集中器。A magnetic flux concentrator disposed opposite to the electromagnetic forming coil inside or outside the electromagnetic forming coil, wherein a plurality of holes in which the workpiece can be placed are provided in the axial direction, and the surface of each hole is A magnetic flux concentrator for electromagnetic forming, characterized in that the layer is continuous with a surface layer of the magnetic flux concentrator on the side facing the electromagnetic forming coil through slits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21799484A JPS6196693A (en) | 1984-10-17 | 1984-10-17 | Magnetic flux concentrator for electromagnetic molding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21799484A JPS6196693A (en) | 1984-10-17 | 1984-10-17 | Magnetic flux concentrator for electromagnetic molding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6196693A true JPS6196693A (en) | 1986-05-15 |
| JPS629993B2 JPS629993B2 (en) | 1987-03-03 |
Family
ID=16712954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21799484A Granted JPS6196693A (en) | 1984-10-17 | 1984-10-17 | Magnetic flux concentrator for electromagnetic molding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6196693A (en) |
-
1984
- 1984-10-17 JP JP21799484A patent/JPS6196693A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS629993B2 (en) | 1987-03-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |