JPH0810864A - Electromagnetic forming device - Google Patents
Electromagnetic forming deviceInfo
- Publication number
- JPH0810864A JPH0810864A JP6147848A JP14784894A JPH0810864A JP H0810864 A JPH0810864 A JP H0810864A JP 6147848 A JP6147848 A JP 6147848A JP 14784894 A JP14784894 A JP 14784894A JP H0810864 A JPH0810864 A JP H0810864A
- Authority
- JP
- Japan
- Prior art keywords
- work
- magnetic flux
- gap
- air
- electromagnetic forming
- 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
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、コイルによって生成さ
れる磁界と、ワークに誘起される二次電流との関係から
磁束集中部材とワークとの間隙に作用する力を用いて該
ワークを電磁成形する電磁成形装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention uses a force acting on a gap between a magnetic flux concentrating member and a work from the relationship between a magnetic field generated by a coil and a secondary current induced in the work to electromagnetically work the work. The present invention relates to an electromagnetic forming device for forming.
【０００２】[0002]
【従来の技術】例えば、特公昭４３−２４２７０号公報
に開示されるように、パイプ等の管状部材に対して縮管
加工、拡管加工等の塑性成形を行うために電磁成形（pu
lse magnetic forming）装置が用いられている。図７に
示されるように、この電磁成形装置１は、基本的には、
略円筒状に形成され、内部に設けられたコイル２によっ
て変化磁界を生成させるコイル部材３と、前記コイル部
材３内に装着され内部に略円筒状のワーク４を収容する
ための孔部が画成された磁束集中部材５と、ワーク４の
上部を縮径するためのテーパ部が形成された成形金型６
とから構成される。なお、参照符号９は電磁成形装置１
が載置される架台を示している。2. Description of the Related Art For example, as disclosed in Japanese Patent Publication No. 43-24270, electromagnetic forming (pu) for performing plastic forming such as pipe reduction and expansion on a tubular member such as a pipe.
lse magnetic forming) device is used. As shown in FIG. 7, the electromagnetic forming apparatus 1 basically has
A coil member 3 that is formed in a substantially cylindrical shape and that generates a changing magnetic field by the coil 2 provided inside, and a hole portion that is mounted in the coil member 3 and that accommodates a substantially cylindrical work 4 inside are defined. Formed magnetic flux concentrating member 5 and molding die 6 in which a taper portion for reducing the diameter of the upper portion of the work 4 is formed
Composed of and. In addition, reference numeral 9 is the electromagnetic forming apparatus 1.
It shows a stand on which is mounted.
【０００３】前記磁束集中部材５の内周面は、内方の中
心に向かって突出する環状凸部７と環状部８とから形成
されている。この場合、前記環状凸部７とワーク４とは
間隙Ａだけ離間し、環状部８とワーク４とは間隙Ｂだけ
離間している。The inner peripheral surface of the magnetic flux concentrating member 5 is formed of an annular convex portion 7 and an annular portion 8 which project toward the inner center. In this case, the annular convex portion 7 and the work 4 are separated by a gap A, and the annular portion 8 and the work 4 are separated by a gap B.
【０００４】前記電磁成形装置１によって発生する電磁
成形力Ｆ（Ｎ）は、Ｆ＝ＩＢｌと表される。ここで、Ｉ
は、磁束集中部材５に誘起する電流（Ａ）、Ｂは、磁束
集中部材５に発生する磁束の磁束密度（Ｔ）、ｌは、ワ
ーク４の加工部の長さ（ｍ）を夫々表している。この場
合、前記コイル２に通電された電流によって変化磁界が
生成され、前記変化磁界によってワーク４に誘起電流
（二次電流）を生じさせる。前記コイル部材３に形成さ
れた磁束は、磁束集中部材５の内周面とワーク４の外周
面との間に画成された間隙の広狭に対応して集中し、前
記間隙が狭小であればある程、高い磁束密度からなる磁
束が発生する。従って、間隙Ｂよりも狭小な間隙Ａで
は、より大なる成形圧力である電磁成形力が生成される
（図８参照）。The electromagnetic forming force F (N) generated by the electromagnetic forming apparatus 1 is expressed as F = IBl. Where I
Is the current (A) induced in the magnetic flux concentrating member 5, B is the magnetic flux density (T) of the magnetic flux generated in the magnetic flux concentrating member 5, and l is the length (m) of the machined portion of the workpiece 4, respectively. There is. In this case, a changing magnetic field is generated by the current passed through the coil 2, and an induced current (secondary current) is generated in the work 4 by the changing magnetic field. The magnetic flux formed in the coil member 3 concentrates in accordance with the width of the gap defined between the inner peripheral surface of the magnetic flux concentration member 5 and the outer peripheral surface of the work 4, and if the gap is small, The magnetic flux having a higher magnetic flux density is generated to some extent. Therefore, in the gap A which is narrower than the gap B, the electromagnetic forming force, which is a larger forming pressure, is generated (see FIG. 8).
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、上記の
従来技術では、電磁成形力をより増大させるために磁束
集中部材５の内周面とワーク４の外周面との間隙Ａを、
従来に比較してより一層狭小にした場合、磁束集中部材
５の内周面とワークの外周面とが接触し易くなるという
不都合がある。However, in the above prior art, the gap A between the inner peripheral surface of the magnetic flux concentration member 5 and the outer peripheral surface of the work 4 is increased in order to further increase the electromagnetic forming force.
If it is made narrower than the conventional one, there is a disadvantage that the inner peripheral surface of the magnetic flux concentrating member 5 and the outer peripheral surface of the workpiece are likely to come into contact with each other.
【０００６】すなわち、磁束集中部材５の孔部に対して
ワーク４を予め位置決めして収容した場合であっても、
前記磁束集中部材５の孔部の軸線Ｘ1 に対するワーク４
の軸線Ｘ2 がずれたり（図９Ａ参照）、あるいはワーク
４が傾倒することにより（図９Ｂ参照）、磁束集中部材
５の内周面とワーク４の外周面とが接触して短絡導通
し、結局、磁束集中部材５に誘導電流（二次電流）が流
れて好適に磁場を生成することができないという不都合
がある。このことは、図９Ｃに示されるように、磁束集
中部材５とワーク４との間に異物９ａが進入し、前記異
物９ａを介して磁束集中部材５とワーク４とが短絡導通
する場合も同様である。That is, even when the work 4 is previously positioned and accommodated in the hole of the magnetic flux concentration member 5,
Workpiece 4 with respect to the axis X 1 of the hole of the magnetic flux concentration member 5
When the axis line X 2 of (1) is displaced (see FIG. 9A) or the work 4 is tilted (see FIG. 9B), the inner peripheral surface of the magnetic flux concentrating member 5 and the outer peripheral surface of the work 4 come into contact with each other to cause short-circuit conduction. After all, there is a disadvantage that an induced current (secondary current) flows through the magnetic flux concentration member 5 and a magnetic field cannot be generated appropriately. This also applies to the case where the foreign matter 9a enters between the magnetic flux concentration member 5 and the work 4 and the magnetic flux concentration member 5 and the work 4 are short-circuited and conducted via the foreign matter 9a, as shown in FIG. 9C. Is.
【０００７】また、磁束集中部材５の孔部内に収容され
るワーク４が位置ずれ等を生じないように図示しない位
置決め手段等を介して位置決めを行う場合には、前記磁
束集中部材５からワーク４を着脱することが煩雑とな
り、成形効率が劣化するという不都合もある。Further, when the workpiece 4 housed in the hole of the magnetic flux concentrating member 5 is positioned by a not-shown positioning means or the like so as not to be displaced, the magnetic flux concentrating member 5 is moved to the workpiece 4. There is also the inconvenience that the attachment and detachment becomes complicated and the molding efficiency deteriorates.
【０００８】本発明は、前記の不都合を克服するために
なされたものであり、磁束集中部材とワークとが接触す
ることなく前記磁束集中部材とワークとによって画成さ
れる間隙のより一層の狭小化を図るとともに、成形効率
を劣化させることなく電磁成形力を増強することが可能
な電磁成形装置を提供することを目的とする。The present invention has been made to overcome the above inconvenience, and the gap defined by the magnetic flux concentrating member and the work is further narrowed without contact between the magnetic flux concentrating member and the work. It is an object of the present invention to provide an electromagnetic molding device capable of increasing the electromagnetic molding force without deteriorating the molding efficiency.
【０００９】[0009]
【課題を解決するための手段】前記の目的を達成するた
めに、本発明は、コイルによって生成される磁界と、ワ
ークに誘起される二次電流との関係から磁束集中部材と
ワークとの間隙に作用する力を用いて該ワークを電磁成
形する装置において、前記ワークと前記磁束集中部材と
の間隙にエアーを送風することにより、前記ワークと磁
束集中部材との間隙を略均一とするエアー供給手段を設
けることを特徴とする。In order to achieve the above object, the present invention provides a gap between a magnetic flux concentrating member and a work from the relationship between a magnetic field generated by a coil and a secondary current induced in the work. In an apparatus for electromagnetically forming a work by using a force acting on an air supply, air is blown into a gap between the work and the magnetic flux concentrating member, so that air is supplied to make the gap between the work and the magnetic flux concentrating member substantially uniform. Means are provided.
【００１０】また、本発明は、ワークと前記磁束集中部
材との間隙にエアーを送風することにより、前記ワーク
と磁束集中部材との間隙を略均一とするエアー供給手段
と、前記間隙に送風されるエアーの流速・流量を制御す
るエアー流量制御機構と、を備えることを特徴とする。Further, according to the present invention, air is blown into the gap between the work and the magnetic flux concentrating member, so that the gap between the work and the magnetic flux concentrating member is made substantially uniform, and the air is blown into the gap. And an air flow rate control mechanism for controlling the flow velocity / flow rate of the air.
【００１１】[0011]
【作用】上記の本発明に係る電磁成形装置では、ワーク
に対して縮管加工または拡管加工を施す際、エアー供給
手段によってワークと前記磁束集中部材との間隙にエア
ーを送風し、ワークと磁束集中部材との間の全ての間隙
を略均一の状態にすることができる。このように位置決
めされた状態でワークに対し電磁成形が施される。従っ
て、ワークと磁束集中部材との間隙を狭小化した場合で
あっても、前記ワークと磁束集中部材とが接触して短絡
導通することを防止することが可能となる。In the electromagnetic forming apparatus according to the present invention described above, when the work is subjected to the contracting process or the expanding process, the air is blown into the gap between the work and the magnetic flux concentrating member by the air supply means, and the work and the magnetic flux are All the gaps with the concentrating member can be made substantially uniform. Electromagnetic forming is performed on the work piece in the thus positioned state. Therefore, even when the gap between the work and the magnetic flux concentration member is narrowed, it is possible to prevent the work and the magnetic flux concentration member from coming into contact with each other to cause short-circuit conduction.
【００１２】また、エアー流量制御機構を介してワーク
と磁束集中部材との間隙に送風されるエアーの流速・流
量を制御することができる。Further, it is possible to control the flow velocity / flow rate of the air blown into the gap between the work and the magnetic flux concentration member via the air flow rate control mechanism.
【００１３】[0013]
【実施例】次に、本発明に係る電磁成形装置について好
適な実施例を挙げ、添付の図面を参照しながら以下詳細
に説明する。The preferred embodiments of the electromagnetic forming apparatus according to the present invention will now be described in detail with reference to the accompanying drawings.
【００１４】図１は、本発明の第１実施例に係る電磁成
形装置を示す概略構成断面図である。FIG. 1 is a schematic sectional view showing the structure of an electromagnetic forming apparatus according to the first embodiment of the present invention.
【００１５】この第１実施例に係る電磁成形装置１０は
縮管加工をする場合に使用される点に特徴がある。前記
電磁成形装置１０は、架台１２上に載置され合成樹脂等
の絶縁材料で形成される略円筒状のコイル部材１４と、
内周面の上部側に環状凸部１５が形成され、前記環状凸
部１５の円周方向に沿って複数のノズル部１６ａ〜１６
ｄ（図２参照）が等間隔離間して設けられた略円筒状の
磁束集中器１８と、前記磁束集中器１８の孔部内に接触
することなく間隙Ｂを介して収容される略円筒状のワー
ク２０と、前記ワーク２０の孔部内に収納され、絶縁材
料によって形成される型形成部材２２とから構成され
る。前記型成形部材２２の上部２３は、先端部に向かっ
て縮径して形成されている。なお、前記ノズル部１６ａ
〜１６ｄのノズル径は、夫々略同一に画成されているも
のとする。The electromagnetic forming apparatus 10 according to the first embodiment is characterized in that it is used when performing a contraction process. The electromagnetic forming device 10 includes a substantially cylindrical coil member 14 placed on a pedestal 12 and formed of an insulating material such as synthetic resin,
An annular convex portion 15 is formed on the upper side of the inner peripheral surface, and a plurality of nozzle portions 16a to 16 are provided along the circumferential direction of the annular convex portion 15.
d (refer to FIG. 2) is a substantially cylindrical magnetic flux concentrator 18 provided at equal intervals, and a substantially cylindrical magnetic flux concentrator 18 accommodated in the hole of the magnetic flux concentrator 18 via a gap B without contact. It comprises a work 20 and a mold forming member 22 housed in the hole of the work 20 and made of an insulating material. The upper portion 23 of the molding member 22 is formed so as to have a reduced diameter toward the tip. Incidentally, the nozzle portion 16a
It is assumed that the nozzle diameters of 16d are substantially the same.
【００１６】前記コイル部材１４の外周面は絶縁材料に
よって形成された補強部材２４によって囲繞され、前記
補強部材２４は外部に磁束が洩れることを防止する機能
を営むものである。前記磁束集中器１８には、底面部か
ら軸線方向に沿って延在するとともに、内周面側に折曲
して夫々のノズル部１６ａ〜１６ｄに連通する複数の通
路２６ａ〜２６ｄが画成されている。なお、前記架台１
２には、エアーによって磁束集中器１８とワーク２０と
の間に付着する塵埃を吹き飛ばし、前記吹き飛ばされた
塵埃を排出するための孔部２８、並びに前記通路２６ａ
〜２６ｄに連通する孔部３０が夫々画成されている。The outer peripheral surface of the coil member 14 is surrounded by a reinforcing member 24 made of an insulating material, and the reinforcing member 24 has a function of preventing magnetic flux from leaking to the outside. The magnetic flux concentrator 18 has a plurality of passages 26a to 26d extending from the bottom surface along the axial direction and bent toward the inner peripheral surface to communicate with the respective nozzles 16a to 16d. ing. In addition, the mount 1
2, a hole 28 for blowing away dust adhering between the magnetic flux concentrator 18 and the work 20 by air and discharging the blown dust, and the passage 26a.
Each of the holes 30 communicating with 26d is defined.
【００１７】前記コイル部材１４の内部には、エアー流
通用の流体通路３２を有するコイル３４が環状に且つ連
続して配設されている。前記コイル３４内の流体通路３
２の一端部にはエアー供給源３６が接続され、前記流体
通路３２の他端部には途中から分岐して磁束集中器１８
の通路２６ａ〜２６ｄに夫々連通する管路３８ａ〜３８
ｄが接続される。従って、エアー供給源３６から供給さ
れたエアーは、コイル３４内の流体通路３２、管路３８
ａ〜３８ｄおよび通路２６ａ〜２６ｄを介してノズル部
１６ａ〜１６ｄからワーク２０に向かって噴射される。
前記エアー供給源３６とノズル部１６ａ〜１６ｄとの間
には、図２に示されるように、夫々のノズル部１６ａ〜
１６ｄから噴射されるエアーの流速を制御するエアー流
量制御機構４０が接続されている。なお、前記コイル３
４には該コイル３４に通電するための図示しない電源を
接続しておく。Inside the coil member 14, a coil 34 having a fluid passage 32 for air circulation is arranged annularly and continuously. Fluid passage 3 in the coil 34
An air supply source 36 is connected to one end of the magnetic flux concentrator 18 and the other end of the fluid passage 32 is branched from the middle.
Conduits 38a-38 communicating with the passages 26a-26d, respectively.
d is connected. Therefore, the air supplied from the air supply source 36 is supplied to the fluid passage 32 and the conduit 38 in the coil 34.
It is jetted toward the work 20 from the nozzle portions 16a to 16d through the a to 38d and the passages 26a to 26d.
Between the air supply source 36 and the nozzle portions 16a to 16d, as shown in FIG.
An air flow rate control mechanism 40 that controls the flow velocity of the air injected from 16d is connected. The coil 3
A power source (not shown) for energizing the coil 34 is connected to 4.
【００１８】このエアー流量制御機構４０は、４つのノ
ズル部１６ａ〜１６ｄが夫々略９０°の角度で等間隔に
離間して環状に配設され、ノズル部１６ａ〜１６ｄに夫
々連通する管路３８ａ〜３８ｄを介してエアー供給源３
６に夫々接続されている。さらに、夫々のノズル部１６
ａ〜１６ｄの近傍には、軸部材４２を回転中心として矢
印方向に所定角度回動することにより、夫々のノズル部
１６ａ〜１６ｄから噴射されるエアーの流速を制御する
回動板４４を付勢するドライバ４６ａ〜４６ｄが付設さ
れ、各ドライバ４６ａ〜４６ｄはコントローラ４８に接
続されている。夫々のノズル部１６ａ〜１６ｄの間には
磁束集中器１８の内周面とワーク２０の外周面とによっ
て画成される間隙Ｃ（図１参照）の量を検出するクリア
ランス測定部材５０ａ〜５０ｄが夫々配設され、各クリ
アランス測定部材５０ａ〜５０ｄは、夫々演算部５２に
接続されている。前記演算部５２の出力信号はコントロ
ーラ４８に導入されている。In the air flow rate control mechanism 40, four nozzle portions 16a to 16d are annularly arranged at equal intervals of about 90 ° and are annularly arranged. Air supply source 3 via ~ 38d
6 are connected respectively. Further, each nozzle portion 16
In the vicinity of a to 16d, a rotating plate 44 for controlling the flow velocity of the air jetted from each of the nozzle portions 16a to 16d is urged by rotating the shaft member 42 as a rotation center in a direction of an arrow by a predetermined angle. The drivers 46a to 46d are attached, and the drivers 46a to 46d are connected to the controller 48. Clearance measuring members 50a to 50d for detecting the amount of the gap C (see FIG. 1) defined by the inner peripheral surface of the magnetic flux concentrator 18 and the outer peripheral surface of the workpiece 20 are provided between the nozzle portions 16a to 16d. The clearance measuring members 50 a to 50 d are respectively arranged and are connected to the computing unit 52. The output signal of the arithmetic unit 52 is introduced into the controller 48.
【００１９】本発明の第１実施例に係る電磁成形装置１
０は、基本的には以上のように構成されるものであり、
次にその動作並びに作用効果について説明する。Electromagnetic forming apparatus 1 according to the first embodiment of the present invention
0 is basically configured as described above,
Next, the operation and the effects will be described.
【００２０】先ず、図１に示されるように、磁束集中器
１８と型形成部材２２との間に、例えば、アルミニウ
ム、銅等の材料からなる円筒状のワーク２０を予め収容
しておく。この場合、前記ワーク２０は何ら位置決めさ
れることなく収容されている。First, as shown in FIG. 1, a cylindrical work 20 made of a material such as aluminum or copper is previously housed between the magnetic flux concentrator 18 and the mold forming member 22. In this case, the work 20 is accommodated without any positioning.
【００２１】このような状態において、図示しない電源
を駆動してコイル３４に通電するとともに、エアー供給
源３６を付勢してノズル部１６ａ〜１６ｄからワーク２
０の外周面に対してエアーを噴射する。前記エアー供給
源３６から供給されたエアーは、コイル３４の内部に画
成された流体通路３２、管路３８ａ〜３８ｄおよび通路
２６ａ〜２６ｄを介して各ノズル部１６ａ〜１６ｄから
夫々噴射される。なお、コイル３４の内部に画成された
流体通路３２をエアーが流通する際、前記エアーは、コ
イル３４の発熱を冷却する機能を営み、該コイル３４の
耐久性を向上させることが可能となる。In such a state, a power source (not shown) is driven to energize the coil 34, and the air supply source 36 is energized so that the workpiece 2 is discharged from the nozzle portions 16a to 16d.
Air is jetted to the outer peripheral surface of 0. The air supplied from the air supply source 36 is jetted from each of the nozzle portions 16a to 16d through the fluid passage 32, the pipe passages 38a to 38d, and the passages 26a to 26d defined inside the coil 34. When air flows through the fluid passage 32 defined inside the coil 34, the air has a function of cooling the heat generation of the coil 34, and the durability of the coil 34 can be improved. .
【００２２】ここで、磁束集中器１８の内周面とワーク
２０の外周面との間隙Ｃ1 〜Ｃ4 を環状に配設されたク
リアランス測定部材５０ａ〜５０ｄで測定し（図２参
照）、その検出信号を演算部５２に導出する。前記演算
部５２では、予め記憶されたプログラムに基づいて演算
を行い、磁束集中器１８の内周面とワーク２０の外周面
との間隙Ｃ1 〜Ｃ4 が円周上の任意の部位において均一
となるようにコントローラ４８に信号を導出する。コン
トローラ４８が前記信号に基づいて各ドライバ４６ａ〜
４６ｄを付勢することによって、回転板４４は軸部材４
２を中心として所定角度回動し、管路３８ａ〜３８ｄ内
のエアーの流通量を夫々調節する。従って、各ノズル部
１６ａ〜１６ｄから噴射されるエアーの流速が夫々制御
され、磁束集中器１８の内周面とワーク２０の外周面と
の間隙Ｃが円周上のすべての部位で均一となる。この結
果、前記間隙Ｃを可能とされる範囲で最大限に狭小化し
た場合であっても、ワーク２０と磁束集中器１８とが接
触しない状態で電磁成形を行うことができる。Here, the clearances C 1 to C 4 between the inner peripheral surface of the magnetic flux concentrator 18 and the outer peripheral surface of the workpiece 20 are measured by the clearance measuring members 50a to 50d arranged annularly (see FIG. 2), The detection signal is derived to the arithmetic unit 52. The calculation unit 52 performs a calculation based on a pre-stored program, and the gaps C 1 to C 4 between the inner peripheral surface of the magnetic flux concentrator 18 and the outer peripheral surface of the work 20 are uniform at any portion on the circumference. The signal is derived to the controller 48 so that Based on the signal, the controller 48 drives each driver 46a ...
By urging 46d, the rotary plate 44 moves to the shaft member 4
It rotates by a predetermined angle about 2, and adjusts the flow rate of air in each of the conduits 38a to 38d. Therefore, the flow velocity of the air jetted from each of the nozzle portions 16a to 16d is controlled respectively, and the gap C between the inner peripheral surface of the magnetic flux concentrator 18 and the outer peripheral surface of the work 20 becomes uniform at all portions on the circumference. . As a result, even when the gap C is narrowed to the maximum extent possible, the electromagnetic forming can be performed in a state where the work 20 and the magnetic flux concentrator 18 are not in contact with each other.
【００２３】例えば、図３Ａに示されるように、ワーク
２０の中心Ｏ1 がノズル部１６ｄ側に偏位して磁束集中
器１８の中心Ｏ2 と一致しない位置に収容されている場
合、クリアランス測定部材５０ａ〜５０ｄは夫々間隙Ｃ
1 〜Ｃ4 に対応する検出信号を演算部５２に導出する。
演算部５２では、間隙Ｃ1 〜Ｃ4 の量が夫々異なること
から、前記間隙Ｃ1 〜Ｃ4 の量が均一となるように演算
し、その演算に基づいてコントローラ４８に信号を導出
する。コントローラ４８では、ノズル部１６ｂから噴射
されるエアーの流速よりもノズル部１６ｄから噴射され
るエアーの流速が大となるように、ドライバ４６ｂ、４
６ｄに信号を導出する。一方のドライバ４６ｄはノズル
部１６ｄの流速が大となるように、他方のドライバ４６
ｂはノズル部１６ｂの流速が小となるように、夫々回動
板４４を所定角度回動させてエアーの流通流量を制御す
る。この結果、ワーク２０がノズル部１６ｂ側に微小距
離だけ偏位して、図３Ｂに示されるように、ワーク２０
の中心Ｏ1 と磁束集中器１８の中心Ｏ2 とが一致し、間
隙Ｃ1 ＝間隙Ｃ2 ＝間隙Ｃ3 ＝間隙Ｃ4 となる位置、す
なわち、磁束集中器１８の内周面とワーク２０の外周面
との間隙Ｃが円周上のすべての部位で均一となる位置に
ワーク２０が位置決めされる。結局、間隙Ｃの量を従来
に比較して狭小化した場合であっても、ワーク２０は磁
束集中器１８に接触することなく位置決めされる。For example, as shown in FIG. 3A, when the center O 1 of the work 20 is deviated to the nozzle portion 16d side and is accommodated at a position which does not coincide with the center O 2 of the magnetic flux concentrator 18, the clearance measurement is performed. The members 50a to 50d each have a gap C.
The detection signals corresponding to 1 to C 4 are derived to the arithmetic unit 52.
Since the amounts of the gaps C 1 to C 4 are different from each other, the arithmetic unit 52 performs an arithmetic operation so that the amounts of the gaps C 1 to C 4 are uniform and outputs a signal to the controller 48 based on the calculation. In the controller 48, the drivers 46b, 4 are arranged so that the flow velocity of the air jetted from the nozzle portion 16d is higher than the flow velocity of the air jetted from the nozzle portion 16b.
The signal is derived to 6d. One of the drivers 46d is arranged so that the flow velocity of the nozzle portion 16d is high, so that the other driver 46d.
b controls the flow rate of the air by rotating the rotating plates 44 by a predetermined angle so that the flow velocity of the nozzle portion 16b becomes small. As a result, the work 20 is deviated to the nozzle portion 16b side by a minute distance, and as shown in FIG.
Center O 1 and the center O 2 of the flux concentrator 18 is matched, the clearance C 1 = clearance C 2 = clearance C 3 = clearance C 4 position, i.e., the inner peripheral surface of the flux concentrator 18 and the workpiece 20 The work 20 is positioned at a position where the gap C between the outer peripheral surface of the work and the outer circumferential surface of the work is uniform at all positions on the circumference. After all, the work 20 is positioned without contacting the magnetic flux concentrator 18 even if the amount of the gap C is narrowed as compared with the conventional case.
【００２４】また、磁束集中器１８の内周面とワーク２
０の外周面との間隙Ｃに塵埃が付着した場合であって
も、エアーによって前記塵埃を吹き飛ばして孔部２８か
ら外部に排出することができ、磁束集中器１８とワーク
２０とが短絡して導通することを防止することができ
る。The inner peripheral surface of the magnetic flux concentrator 18 and the work 2
Even if dust adheres to the gap C between the outer peripheral surface of 0 and the outer peripheral surface of 0, the dust can be blown off by air and discharged to the outside from the hole 28, and the magnetic flux concentrator 18 and the work 20 are short-circuited. It is possible to prevent conduction.
【００２５】このようにしてワーク２０が磁束集中器１
８内に位置決めされた状態において、通電されたコイル
３４から発生する磁束が、磁束集中器１８とワーク２０
との間隙Ｃに集中して磁場が形成されるとともに、ワー
ク２０に誘起電流（二次電流）が誘起される。前記誘起
電流と磁束との関係に基づいて型形成部材２２の軸線方
向と略直交する方向からワーク２０の上部側を押圧する
力が作用する（フレミングの左手の法則）。この結果、
図４に示されるように、円筒状のワーク２０の上部側が
縮径する縮管加工を施すことができる。In this way, the work 20 is placed on the magnetic flux concentrator 1.
The magnetic flux generated from the energized coil 34 in the state of being positioned inside the
A magnetic field is formed concentrating in the gap C between and, and an induced current (secondary current) is induced in the work 20. Based on the relationship between the induced current and the magnetic flux, a force that presses the upper side of the work 20 acts from a direction substantially orthogonal to the axial direction of the mold forming member 22 (Fleming's left-hand rule). As a result,
As shown in FIG. 4, it is possible to perform a contracting process in which the diameter of the upper side of the cylindrical work 20 is reduced.
【００２６】次に、本発明の第２実施例に係る電磁成形
装置６０を図５に示す。Next, FIG. 5 shows an electromagnetic forming apparatus 60 according to the second embodiment of the present invention.
【００２７】この電磁成形装置６０は、図６に示される
ように、ワーク７０の略中央部に対し拡管加工をする場
合に用いられる点に特徴がある。前記電磁成形装置は、
架台６２上に載置され、合成樹脂等の絶縁材料で形成さ
れる略円柱状のコイル部材６４と、前記コイル部材６４
に外嵌され、外部に向かって膨出する環状凸部６５に複
数のノズル部６６ａ〜６６ｄ（但し、ノズル部６６ｂ、
６６ｄは図示せず）が等間隔に離間して配設された略円
筒状の磁束集中器６８と、前記磁束集中器６８の環状凸
部６５に接触することなく間隙Ｃを介して収容される略
円筒状のワーク７０と、前記ワーク７０の外周側に収容
され、絶縁材料によって形成される型形成部材７２とか
ら構成される。前記型形成部材７２の中央には環状凹部
７４が画成されている。前記ノズル部６６ａ〜６６ｄの
ノズル径が夫々略同一に画成されている点は、第１実施
例と同様である。As shown in FIG. 6, this electromagnetic forming apparatus 60 is characterized in that it is used when expanding the approximately central portion of the work 70. The electromagnetic forming device,
A substantially cylindrical coil member 64 placed on the frame 62 and formed of an insulating material such as synthetic resin, and the coil member 64.
A plurality of nozzle portions 66a to 66d (provided that the nozzle portion 66b,
66d is housed via a gap C without contacting the substantially cylindrical magnetic flux concentrator 68 in which (not shown) are arranged at equal intervals and the annular convex portion 65 of the magnetic flux concentrator 68. It is composed of a substantially cylindrical work 70 and a mold forming member 72 which is housed on the outer peripheral side of the work 70 and is made of an insulating material. An annular recess 74 is defined in the center of the mold forming member 72. Similar to the first embodiment, the nozzle diameters of the nozzle portions 66a to 66d are defined to be substantially the same.
【００２８】前記磁束集中器６８には、底面部から中央
部まで延在し内周面側に折曲して夫々ノズル部６６ａ〜
６６ｄに連通する複数の通路７６ａ〜７６ｄ（但し、通
路７６ｂ、７６ｄは図示せず）が画成されている。な
お、前記架台６２には、エアーによって磁束集中器６８
とワーク７０との間に付着する塵埃を吹き飛ばし、前記
吹き飛ばされた塵埃等を排出するための孔部７８、並び
に前記通路７６ａ〜７６ｄに連通する孔部８０が夫々画
成されている。The magnetic flux concentrator 68 extends from the bottom surface portion to the central portion and is bent toward the inner peripheral surface to form nozzle portions 66a to 66a, respectively.
A plurality of passages 76a to 76d (however, the passages 76b and 76d are not shown) are defined to communicate with the 66d. A magnetic flux concentrator 68 is installed on the pedestal 62 by air.
A hole 78 for blowing off dust adhering between the workpiece 70 and the work 70 and discharging the blown dust and the like, and a hole 80 communicating with the passages 76a to 76d are defined.
【００２９】前記コイル部材６４の内部には、エアー流
通用の流体通路８２を有するコイル８４が環状に且つ連
続して配設されている。前記コイル８４内の流体通路８
２の一端部にはエアー供給源８６が接続され、前記流体
通路８２の他端部には途中から分岐して磁束集中器６８
の通路７６ａ〜７６ｄに夫々連通する管路８８ａ〜８８
ｄ（但し、管路８８ｂ、８８ｄは図示せず）が接続され
ている。Inside the coil member 64, a coil 84 having a fluid passage 82 for air circulation is arranged annularly and continuously. Fluid passage 8 in the coil 84
An air supply source 86 is connected to one end of the magnetic flux concentrator 68 and the other end of the fluid passage 82 is branched from the middle.
Pipes 88a-88 communicating with the passages 76a-76d of
d (however, the pipe lines 88b and 88d are not shown) are connected.
【００３０】なお、前記エアー供給源８６とノズル部６
６ａ〜６６ｄとの間には、第１実施例と同様に構成さ
れ、夫々のノズル部６６ａ〜６６ｄから噴射されるエア
ーの流速を制御するエアー流量制御機構（図示せず）が
接続されている。The air supply source 86 and the nozzle portion 6
An air flow rate control mechanism (not shown) configured to control the flow velocity of the air jetted from each of the nozzle portions 66a to 66d is connected between the nozzles 6a to 66d and similar to the first embodiment. .
【００３１】本発明の第２実施例に係る電磁成形装置６
０は、基本的には以上のように構成されるものであり、
次にその動作並びに作用効果について説明する。なお、
この電磁成形装置６０は、第１実施例に係る電磁成形装
置１０と同様の動作並びに作用効果を有するため、異な
る点についてのみ説明する。Electromagnetic forming apparatus 6 according to the second embodiment of the present invention.
0 is basically configured as described above,
Next, the operation and the effects will be described. In addition,
Since this electromagnetic forming apparatus 60 has the same operation and effect as the electromagnetic forming apparatus 10 according to the first embodiment, only different points will be described.
【００３２】第２実施例に係る電磁成形装置６０では、
複数のノズル部６６ａ〜６６ｄからワーク７０の内周面
に向かってエアーを噴射し、該ワーク７０の内周面を押
圧することにより、磁束集中器６８の環状凸部６５とワ
ーク７０の内周面との間隙Ｃが円周上のすべての部位で
均一となるように位置決めされる。In the electromagnetic forming apparatus 60 according to the second embodiment,
By injecting air from the plurality of nozzle portions 66a to 66d toward the inner peripheral surface of the work 70 and pressing the inner peripheral surface of the work 70, the annular convex portion 65 of the magnetic flux concentrator 68 and the inner peripheral surface of the work 70. Positioning is performed so that the clearance C between the surface and the surface is uniform at all positions on the circumference.
【００３３】なお、前記第１、第２実施例に係る電磁成
形装置１０、６０では、ノズル部およびクリアランス測
定部材をそれぞれ４個ずつ設けて説明しているが、これ
に限定されるものではなく、等間隔に複数個のノズル部
およびクリアランス測定部材を配設すればよいことは勿
論である。In the electromagnetic forming devices 10 and 60 according to the first and second embodiments, four nozzle portions and four clearance measuring members are provided, but the present invention is not limited to this. Of course, it is only necessary to dispose a plurality of nozzle portions and clearance measuring members at equal intervals.
【００３４】[0034]
【発明の効果】本発明に係る電磁成形装置によれば、以
下の効果が得られる。According to the electromagnetic forming apparatus of the present invention, the following effects can be obtained.
【００３５】すなわち、エアー供給手段を設けることに
より、ワークと磁束集中部材とが接触することがなく、
該ワークと磁束集中部材との間の全ての間隙を略均一の
状態にすることができる。従って、ワークと磁束集中部
材との間隙をより一層狭小とすることができ、前記間隙
の狭小化を図ることにより、成形効率を劣化させること
なく、ワークに作用する力である電磁成形力を増強する
ことが可能となる。That is, by providing the air supply means, the work and the magnetic flux concentration member do not come into contact with each other,
All the gaps between the work and the magnetic flux concentration member can be made substantially uniform. Therefore, the gap between the work and the magnetic flux concentration member can be further narrowed, and by narrowing the gap, the electromagnetic forming force, which is the force acting on the work, is enhanced without deteriorating the forming efficiency. It becomes possible to do.
【図１】本発明の第１実施例に係る電磁成形装置を示す
概略構成断面図である。FIG. 1 is a schematic configuration sectional view showing an electromagnetic forming apparatus according to a first embodiment of the present invention.
【図２】図１に示す電磁成形装置を構成するエアー流量
制御機構の概略構成図である。FIG. 2 is a schematic configuration diagram of an air flow rate control mechanism that constitutes the electromagnetic forming apparatus shown in FIG.
【図３】図３Ａおよび図３Ｂは、図２に示すエアー流量
制御機構の動作を示す説明図である。3A and 3B are explanatory views showing the operation of the air flow rate control mechanism shown in FIG.
【図４】電磁成形を施す前のワークと、縮管加工を施し
たワークとを示す斜視図である。FIG. 4 is a perspective view showing a work before being subjected to electromagnetic forming and a work after being subjected to a contraction process.
【図５】本発明の第２実施例に係る電磁成形装置を示す
概略構成断面図である。FIG. 5 is a schematic configuration sectional view showing an electromagnetic forming apparatus according to a second embodiment of the present invention.
【図６】電磁成形を施す前のワークと、拡管加工を施し
たワークとを示す斜視図である。FIG. 6 is a perspective view showing a work before electromagnetic forming and a work subjected to pipe expanding processing.
【図７】従来技術に係る電磁成形装置を示す概略構成断
面図である。FIG. 7 is a schematic configuration sectional view showing an electromagnetic forming device according to a conventional technique.
【図８】従来技術に係る電磁成形装置において、間隙Ａ
と成形性との関係を示す説明図である。FIG. 8 shows a gap A in the electromagnetic forming apparatus according to the prior art.
It is explanatory drawing which shows the relationship between the moldability.
【図９】図９Ａ〜図９Ｃは、図７に示す電磁成形装置に
おける解決すべき課題を説明するための図である。9A to 9C are views for explaining a problem to be solved in the electromagnetic forming apparatus shown in FIG. 7.
１０、６０…電磁成形装置 １２、６２…架
台 １４、６４…コイル部材 １５…環状凸部 １６ａ〜１６ｄ、６６ａ〜６６ｄ…ノズル部 １８、６８…磁束集中器 ２０、７０…ワ
ーク ２２、７２…型成形部材 ２４…補強部材 ２６ａ〜２６ｄ、７６ａ〜７６ｄ…通路 ２８、３０、７８、８０…孔部 ３２、８２…流
体通路 ３４、８４…コイル ３６、８６…エ
アー供給源 ３８ａ〜３８ｄ、８８ａ〜８８ｄ…管路 ４０…エアー流量制御機構 ４４…回動板 ４６ａ〜４６ｄ…ドライバ ４８…コントロ
ーラ ５０ａ〜５０ｄ…クリアランス測定部材 ５２…演算部10, 60 ... Electromagnetic forming device 12, 62 ... Stand 14, 64 ... Coil member 15 ... Annular convex part 16a-16d, 66a-66d ... Nozzle part 18, 68 ... Magnetic flux concentrator 20, 70 ... Work 22, 72 ... Molding member 24 ... Reinforcing member 26a-26d, 76a-76d ... Passage 28, 30, 78, 80 ... Hole portion 32, 82 ... Fluid passage 34, 84 ... Coil 36, 86 ... Air supply source 38a-38d, 88a-88d ... Pipe line 40 ... Air flow rate control mechanism 44 ... Rotating plate 46a to 46d ... Driver 48 ... Controller 50a to 50d ... Clearance measuring member 52 ... Arithmetic unit
Claims (5)
に誘起される二次電流との関係から磁束集中部材とワー
クとの間隙に作用する力を用いて該ワークを電磁成形す
る装置において、 前記ワークと前記磁束集中部材との間隙にエアーを送風
することにより、前記ワークと磁束集中部材との間隙を
略均一とするエアー供給手段を設けることを特徴とする
電磁成形装置。1. An apparatus for electromagnetically forming a work by using a force acting on a gap between a magnetic flux concentration member and the work based on a relationship between a magnetic field generated by a coil and a secondary current induced in the work, An electromagnetic forming apparatus comprising: an air supply unit that blows air into a gap between a work and the magnetic flux concentrating member to make the gap between the work and the magnetic flux concentrating member substantially uniform.
に誘起される二次電流との関係から磁束集中部材とワー
クとの間隙に作用する力を用いて該ワークを電磁成形す
る装置において、 前記ワークと前記磁束集中部材との間隙にエアーを送風
することにより、前記ワークと磁束集中部材との間隙を
略均一とするエアー供給手段と、 前記間隙に送風されるエアーの流速・流量を制御するエ
アー流量制御機構と、 を備えることを特徴とする電磁成形装置。2. An apparatus for electromagnetically forming a work by using a force acting on a gap between a magnetic flux concentration member and the work based on a relationship between a magnetic field generated by a coil and a secondary current induced in the work, By supplying air to the gap between the work and the magnetic flux concentrating member, the air supply means for making the gap between the work and the magnetic flux concentrating member substantially uniform, and controlling the flow velocity / flow rate of the air blown to the gap. An electromagnetic forming apparatus comprising: an air flow rate control mechanism.
アー供給手段は、磁束集中手段に設けられ、等間隔離間
して環状に配設された複数のノズル部を有することを特
徴とする電磁成形装置。3. The electromagnetic device according to claim 1, wherein the air supply means has a plurality of nozzle portions provided in the magnetic flux concentration means and annularly arranged at equal intervals. Molding equipment.
置において、エアー流量制御機構は、ワークと磁束集中
部材との間隙量を検出する複数のクリアランス測定部材
と、前記クリアランス測定部材からの検出信号が導入さ
れ、ワークと磁束集中部材との間隙を略均一とする演算
を行う演算部と、前記演算部からの信号に基づいて複数
のドライバを付勢・滅勢し、複数のノズル部に連通する
夫々の通路を流通するエアーの流速・流量を制御するコ
ントローラとを含むことを特徴とする電磁成形装置。4. The apparatus according to claim 1, wherein the air flow rate control mechanism includes a plurality of clearance measuring members for detecting a gap amount between the work and the magnetic flux concentration member, and the clearance measuring member. A detection signal from the calculation unit is introduced, and a calculation unit that performs calculation to make the gap between the work and the magnetic flux concentration member substantially uniform, and a plurality of drivers are energized / deenergized based on the signal from the calculation unit. An electromagnetic forming apparatus comprising: a controller that controls a flow velocity / flow rate of air flowing through each passage communicating with a nozzle portion.
置において、コイル内にエアーが流通する通路を画成す
ることを特徴とする電磁成形装置。5. The electromagnetic forming apparatus according to claim 1, wherein a passage through which air flows is defined in the coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14784894A JP3454570B2 (en) | 1994-06-29 | 1994-06-29 | Electromagnetic molding equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14784894A JP3454570B2 (en) | 1994-06-29 | 1994-06-29 | Electromagnetic molding equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0810864A true JPH0810864A (en) | 1996-01-16 |
| JP3454570B2 JP3454570B2 (en) | 2003-10-06 |
Family
ID=15439630
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14784894A Expired - Fee Related JP3454570B2 (en) | 1994-06-29 | 1994-06-29 | Electromagnetic molding equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3454570B2 (en) |
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|---|---|---|---|---|
| WO2004028720A1 (en) * | 2002-09-27 | 2004-04-08 | Kabushiki Kaisha Kobe Seiko Sho | Process for producing tubular ring with beads and die for use therein |
| JP2007075899A (en) * | 2002-09-27 | 2007-03-29 | Kobe Steel Ltd | Process for producing tubular ring with beads |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004028720A1 (en) * | 2002-09-27 | 2004-04-08 | Kabushiki Kaisha Kobe Seiko Sho | Process for producing tubular ring with beads and die for use therein |
| JP2007075899A (en) * | 2002-09-27 | 2007-03-29 | Kobe Steel Ltd | Process for producing tubular ring with beads |
| US7487655B2 (en) | 2002-09-27 | 2009-02-10 | Kobe Steel, Ltd | Process for producing tubular ring with beads and die for use therein |
| JP2013252744A (en) * | 2012-06-05 | 2013-12-19 | Kobe Steel Ltd | Automobile bumper structure and method of manufacturing the same |
| KR101493422B1 (en) * | 2013-05-24 | 2015-02-16 | 한국기계연구원 | Helical core structure for electromagnetic forming and electromagnetic forming equipment using the same |
| KR101493421B1 (en) * | 2013-05-24 | 2015-02-16 | 한국기계연구원 | Electromagnetic forming method and equipment of workpiece with high relative magnetic permeability |
| CN103861931A (en) * | 2014-04-01 | 2014-06-18 | 湖南大学 | Device and method for machining composite energy absorption tube |
| CN103861933A (en) * | 2014-04-01 | 2014-06-18 | 湖南大学 | Corrugated pipe forming device and corrugated pipe machined through corrugated pipe forming device |
| CN103861933B (en) * | 2014-04-01 | 2015-11-25 | 湖南大学 | A kind of corrugated pipe forming device and the bellows processed with this device |
| US20160221059A1 (en) * | 2015-02-03 | 2016-08-04 | Kabushiki Kaisha Kobe Seiko Sho (Kobe Steel, Ltd.) | Electromagnetic forming coil device and method of making electromagnetically formed product |
| JP2016140897A (en) * | 2015-02-03 | 2016-08-08 | 株式会社神戸製鋼所 | Electromagnet molding coil device and manufacturing method of electromagnet molding material |
| CN107030172A (en) * | 2017-05-12 | 2017-08-11 | 华中科技大学 | A kind of electromagnetic casting method and device based on tubing under background magnetic field |
| CN109175062A (en) * | 2018-07-10 | 2019-01-11 | 西安交通大学 | The electromagnetic pulse forming device and manufacturing process of crimping cable transition joint connecting tube |
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|---|---|
| JP3454570B2 (en) | 2003-10-06 |
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