JP3461262B2 - Electromagnetic press - Google Patents
Electromagnetic pressInfo
- Publication number
- JP3461262B2 JP3461262B2 JP13590997A JP13590997A JP3461262B2 JP 3461262 B2 JP3461262 B2 JP 3461262B2 JP 13590997 A JP13590997 A JP 13590997A JP 13590997 A JP13590997 A JP 13590997A JP 3461262 B2 JP3461262 B2 JP 3461262B2
- Authority
- JP
- Japan
- Prior art keywords
- press
- movable
- electromagnetic
- fixed
- ram
- 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 - Fee Related
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/42—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by magnetic means, e.g. electromagnetic
Description
【発明の詳細な説明】
【０００１】
【発明の属する技術分野】本発明は、電磁力によりラム
を加速し、ラム及び上型の総質量が持つ運動エネルギを
利用して高速剪断等のプレス成形を行う電磁プレスに関
し、電磁プレス内で発生した振動を電磁プレスを設置し
た床面に伝えない防振構造とするために有効である。
【０００２】
【従来の技術】従来の技術における電磁プレスには、特
開昭６１−３３７９５により公知となっている図３に示
す構成が多い。すなわち、電磁プレス１には、フレーム
２に上下方向に案内されたラム３を設け、フレーム２の
上部にラム駆動コイル４を設けてラム３の磁性部と対向
させ、ラム駆動コイル４の通電を制御してラム３を周期
的に吸引・反発して上下動させるとともに、ラム３とフ
レーム２の間にばね５からなる共振振動装置を設けてい
る。
【０００３】また、図４に示す電磁プレス６は、フレー
ム７に上下方向に案内されたラム８の磁性部と対向させ
て電磁石９を設け、電磁石９でラム８を下方へ加速する
とともに、フレーム７の上部に設けたシリンダ１０でラ
ム８を上方へのみ引き上げ、上死点で電磁石９に微小電
流を流してラム８を保持し、電磁石９の電流を切り換え
てラム８を下方へ加速し、下死点でシリンダ１０の圧力
流体を切り換えてラム８を上死点に戻すものである。
【０００４】
【発明が解決しようとする課題】電磁プレスは、ラムを
駆動する速度が一般のプレス機械よりも速いと言う特徴
があるが、急激なラムの加減速に伴う大きな振動と騒音
を発生する。上述のように、従来の技術における電磁プ
レス１、６では、フレーム２、７の底面から床、または
設置面に向けて大きな振動と騒音が伝播し、周辺の機器
に悪影響を及ぼすことは避けられない。図３に示す電磁
プレス１のように、ラム駆動コイル４の駆動力とばね５
とで共振振動装置を形成しても、床への振動と騒音の伝
播を減少させるものではない。振動と騒音の伝播を防止
するため、電磁プレスの底面と床との間に防振材を介在
させても、電磁プレスのラムを駆動する加速度のような
瞬間的で大きなものには、十分な防振効果が得られなか
った。
【０００５】また、電磁プレス自身のプレス加工により
発生する騒音は、一般のプレス機械同様、プレス機械周
囲に防音ケースを設置して吸音及び遮音を行うが、防音
ケースそのものが振動して騒音源とならないような防振
構造が要求されるため、多くの費用を必要とした。
【０００６】本発明の目的は、上述の課題を解決し、電
磁プレスでプレス加工により発生する振動を設置面に伝
えない構造の電磁プレスを提供することにある。
【０００７】
【課題を解決するための手段】上述の課題を解決するた
めに、本発明は、固定部に昇降自在に設けた可動部と、
固定部とを、それぞれ可動部支持ばねと固定部支持ばね
で支持プレートに支持し、可動部を支持する可動部支持
ばねのばね常数ｋ１と、固定部を支持する固定部支持ば
ねのばね常数ｋ２との比を、可動部の質量ｍ１と固定部
の質量ｍ２との比に等しくすることにより、プレス加工
における可動部の変位ｘ１とばね常数ｋ１との積が、固
定部の変位ｘ２とばね常数ｋ２との積に等しく、かつ方
向が逆で相殺され、支持プレートに作用する力は可動部
と固定部の重量の和となる電磁プレスを構成する。
【０００８】
【発明の実施の形態】図１及び図２に本発明における電
磁プレス１１の一実施例を示す。図１に示すように、電
磁プレス１１は、上部プレート１２と下部プレート１３
とを複数のガイドピン１４で連結固定し、上部プレート
１２の下面中央部にコイル１５を固装し、下部プレート
１３の上面中央部に下型１６を固装してなる固定部１７
と、複数のガイドピン１４にブッシュ１８を介して案内
され上下動自在としたラム１９と、ラム１９上面にコイ
ル１５と対向した導電プレート２０と、ラム１９下面中
央部に下型１６と対向させて固装した上型２１とからな
る可動部２２とを、それぞれ支持プレート２３の上面に
複数の固定部支持ばね２４と複数の可動部支持ばね２５
とで支持し、プレス加工以外で、電磁プレス１１に加わ
る外力による振動を防止する複数のダンパ２６を下部プ
レート１３と支持プレート２３の間に設けた構造であ
る。なお、コイル１５は、電磁プレス１１に力が加わら
ないように配慮した電線で、駆動回路２７に接続してい
る。
【０００９】上述の構造により、駆動回路２７を制御し
コイル１５に磁界が発生すると、磁界の変化に対して導
電プレート２０に渦電流が発生し、コイル１５との間に
強い反発力が発生し、ラム１９及び上型２１は、急激に
加速して下降し、下型１６との間でプレス加工が行われ
る。プレス下降後、ラム１９は、可動部支持ばね２５の
力により上死点に戻る。
【００１０】図１に示すような構成を有する電磁プレス
１１の各部の条件を、
ｍ１：可動部２２の質量
ｍ２：固定部の質量
ｋ１：可動部支持ばね２５のばね常数
ｋ２：固定部支持ばね２４のばね常数
α１：プレス加工の時に可動部２２に作用する加速度
ｘ１：変位
α２：固定部１７に作用する加速度
ｘ２：変位
Ｆ０：支持プレート２３に作用する力
Ｆ：可動部２２と固定部１７との間に作用する力
としてモデル図を描くと、図２のようになる。
【００１１】図２において、
Ｆ＝ｍ１・α１＋ｋ１・ｘ１＝ｍ２・α２＋ｋ２・ｘ２
但し、重力の項は、ｘ１、ｘ２の原点の取り方によりキ
ャンセル、
ｘ１＝∬α１ｄｔｄｔ
ｘ２＝∬α２ｄｔｄｔ
Ｆ０＝ｋ１・ｘ１−ｋ２・ｘ２＋（ｍ１＋ｍ２）・
である。ここで、ｋ１：ｋ２＝ｍ１：ｍ２ となる条件
を選べば、ｘ１：ｘ２＝ｍ２：ｍ１ となり、 ｋ１・
ｘ１＝ｋ２・ｘ２ で方向が逆となることが常に成立す
る。したがって、 Ｆ０＝（ｍ１＋ｍ２） となる。
すなわち、支持プレート２３には、可動部２２と固定部
１７の重量の和が常に作用するだけで、プレス加工によ
る可動部２２と固定部１７の運動の力は、相殺されて作
用しない。結局、支持プレート２３から設置面２８に作
用する力は、可動部２２と固定部１７と下部プレート２
３の重量の和、すなわち電磁プレス１１の重量だけで、
プレス加工による振動が伝わることはない。
【００１２】上述の説明からも判るように、固定部に対
して可動部を電磁的に駆動する方法は、本発明における
実施例に限定されるものではない。本実施例では、電磁
プレスの駆動方式としてコイルとそれに対向した導電プ
レートに発生する渦電流による反発力を利用した方式を
示したが、それ以外の図３及び図４に示した電磁回路の
方式や、コイルの中の可動鉄心をコイルを励磁すること
で駆動する、いわゆるリニア電磁ソレノイド方式の電磁
プレス等にも適用出来る。
【００１３】
【発明の効果】以上の説明から明らかなように、本発明
によれば、可動部支持ばねと固定部支持ばねとのばね常
数の比ｋ１：ｋ２を、可動部と固定部の質量の比ｍ１：
ｍ２に等しくすることにより、プレス加工により発生す
る振動が設置面に伝わることが抑制され、周辺の機器等
に対する振動による障害を防止出来る。従って、電磁プ
レスの周辺に設ける防音ケースを防振構造とする必要も
なく、軽量でコンパクトに出来る等の効果が得られる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for accelerating a ram by an electromagnetic force and utilizing a kinetic energy of a total mass of the ram and an upper die for press molding such as high-speed shearing. This is effective for providing an anti-vibration structure in which vibration generated in the electromagnetic press is not transmitted to the floor on which the electromagnetic press is installed. 2. Description of the Related Art There are many conventional electromagnetic presses shown in FIG. 3 which are known from Japanese Patent Application Laid-Open No. 61-33795. That is, the electromagnetic press 1 is provided with a ram 3 guided in a vertical direction on a frame 2, a ram drive coil 4 is provided on an upper portion of the frame 2 so as to be opposed to a magnetic portion of the ram 3, and the ram drive coil 4 is energized. Under control, the ram 3 is periodically sucked and repelled to move up and down, and a resonance vibration device including a spring 5 is provided between the ram 3 and the frame 2. The electromagnetic press 6 shown in FIG. 4 has an electromagnet 9 provided on a frame 7 so as to face a magnetic portion of a ram 8 guided in the vertical direction. The ram 8 is lifted only upward by the cylinder 10 provided at the upper part of the 7, a small current is applied to the electromagnet 9 at the top dead center to hold the ram 8, and the current of the electromagnet 9 is switched to accelerate the ram 8 downward. The pressure fluid of the cylinder 10 is switched at the bottom dead center to return the ram 8 to the top dead center. [0004] Electromagnetic presses are characterized in that the speed of driving the ram is faster than that of ordinary press machines, but they generate large vibrations and noise due to rapid acceleration and deceleration of the ram. I do. As described above, in the electromagnetic presses 1 and 6 according to the related art, large vibrations and noises propagate from the bottom surfaces of the frames 2 and 7 toward the floor or the installation surface, thereby avoiding adverse effects on peripheral devices. Absent. As in the electromagnetic press 1 shown in FIG.
Even if the resonance vibration device is formed by the above, the transmission of vibration and noise to the floor is not reduced. In order to prevent the propagation of vibration and noise, even if an anti-vibration material is interposed between the bottom and the floor of the electromagnetic press, it is not sufficient for momentary and large objects such as acceleration that drives the ram of the electromagnetic press. No anti-vibration effect was obtained. [0005] The noise generated by the press working of the electromagnetic press itself performs sound absorption and sound insulation by installing a soundproof case around the press machine as in a general press machine, but the soundproof case itself vibrates and becomes a noise source. A large amount of expense was required because a vibration-proof structure that would not be required was required. An object of the present invention is to solve the above-mentioned problems and to provide an electromagnetic press having a structure in which vibration generated by press working in the electromagnetic press is not transmitted to an installation surface. [0007] In order to solve the above-mentioned problems, the present invention provides a movable portion provided on a fixed portion so as to be able to move up and down,
The fixed portion is supported on a support plate by a movable portion support spring and a fixed portion support spring, respectively, and a spring constant k1 of a movable portion support spring that supports the movable portion and a spring constant k2 of a fixed portion support spring that supports the fixed portion. Is equal to the ratio of the mass m1 of the movable part to the mass m2 of the fixed part, the product of the displacement x1 of the movable part and the spring constant k1 in the press working becomes the displacement x2 of the fixed part and the spring constant k1. The force acting on the support plate is equal to the product of k2 and the direction is reversed and constitutes an electromagnetic press in which the weight of the movable part and the fixed part is the sum of the weights. FIG. 1 and FIG. 2 show an embodiment of an electromagnetic press 11 according to the present invention. As shown in FIG. 1, the electromagnetic press 11 includes an upper plate 12 and a lower plate 13.
Are fixed by a plurality of guide pins 14, a coil 15 is fixedly mounted at the center of the lower surface of the upper plate 12, and a lower mold 16 is fixedly mounted at the center of the upper surface of the lower plate 13.
A ram 19 guided by a plurality of guide pins 14 via a bush 18 so as to be movable up and down; a conductive plate 20 facing the coil 15 on the upper surface of the ram 19; The movable part 22 composed of the upper die 21 fixed and mounted thereon is provided on the upper surface of the support plate 23 with a plurality of fixed part support springs 24 and a plurality of movable part support springs 25, respectively.
A plurality of dampers 26 are provided between the lower plate 13 and the support plate 23 for preventing vibration due to external force applied to the electromagnetic press 11 other than press working. Note that the coil 15 is connected to the drive circuit 27 by an electric wire in which no force is applied to the electromagnetic press 11. When the drive circuit 27 is controlled to generate a magnetic field in the coil 15 according to the above-described structure, an eddy current is generated in the conductive plate 20 in response to a change in the magnetic field, and a strong repulsive force is generated between the conductive plate 20 and the coil 15. , The ram 19 and the upper mold 21 are rapidly accelerated and lowered, and press working is performed with the lower mold 16. After the press descends, the ram 19 returns to the top dead center by the force of the movable portion support spring 25. The conditions of each part of the electromagnetic press 11 having the structure shown in FIG. 1 are as follows: m1: mass of the movable part 22 m2: mass of the fixed part k1: spring constant of the movable part supporting spring 25 k2: fixed part supporting spring A spring constant α1 of 24: an acceleration x acting on the movable portion 22 at the time of press working x1: a displacement α2: an acceleration x2 acting on the fixed portion 17: a displacement F0: a force acting on the support plate 23, F: a movable portion 22 and a fixed portion 17 If a model diagram is drawn as the force acting between these, it will be as shown in FIG. In FIG. 2, F = m1 · α1 + k1 · x1 = m2 · α2 + k2 · x2 However, the term of gravity is canceled depending on how the origins of x1 and x2 are set, x1 = ∬α1dtdt x2 = ∬α2dtdt F0 = k1 · x1−k2 · x2 + (m1 + m2) · Here, if the condition of k1: k2 = m1: m2 is selected, then x1: x2 = m2: m1, and k1 ·
It is always established that the direction is reversed when x1 = k2 · x2. Therefore, F0 = (m1 + m2).
That is, only the sum of the weights of the movable portion 22 and the fixed portion 17 always acts on the support plate 23, and the force of the movement of the movable portion 22 and the fixed portion 17 due to the press work is canceled out and does not act. As a result, the force acting on the installation surface 28 from the support plate 23 is applied to the movable portion 22, the fixed portion 17, and the lower plate 2.
3, the weight of the electromagnetic press 11 alone,
Vibration due to press working is not transmitted. As can be seen from the above description, the method of electromagnetically driving the movable portion with respect to the fixed portion is not limited to the embodiment in the present invention. In the present embodiment, as a driving method of the electromagnetic press, a method using a repulsive force due to an eddy current generated in a coil and a conductive plate facing the coil is shown, but the other method of the electromagnetic circuit shown in FIGS. Also, the present invention can be applied to a so-called linear electromagnetic solenoid type electromagnetic press in which a movable iron core in a coil is driven by exciting the coil. As is apparent from the above description, according to the present invention, the ratio k1: k2 of the spring constant between the movable part support spring and the fixed part support spring is determined by the mass of the movable part and the fixed part. Ratio m1:
By making it equal to m2, the transmission of the vibration generated by the press working to the installation surface is suppressed, and the failure due to the vibration to peripheral devices and the like can be prevented. Therefore, the soundproof case provided around the electromagnetic press does not need to have a vibration-proof structure, and effects such as light weight and compactness can be obtained.
【図面の簡単な説明】
【図１】本発明の一実施例における電磁プレスの要部正
面図
【図２】同じく、モデル図
【図３】従来例における電磁プレスの要部正面図
【図４】別の従来例における電磁プレスの要部正面図
【符号の説明】
１１は電磁プレス、１２は上部プレート、１３は下部プ
レート、１４はガイドピン、１５はコイル、１６は下
型、１７は固定部、１８はブッシュ、１９はラム、２０
は導電プレート、２１は上型、２２は可動部、２３は支
持プレート、２４は固定部支持ばね、２５は可動部支持
ばね、２６はダンパ、２７は駆動回路、２８は設置面、
である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a front view of a main part of an electromagnetic press according to an embodiment of the present invention. FIG. 2 is a model diagram of the same. FIG. Front view of main part of electromagnetic press in another conventional example [Explanation of reference numerals] 11 is an electromagnetic press, 12 is an upper plate, 13 is a lower plate, 14 is a guide pin, 15 is a coil, 16 is a lower mold, and 17 is fixed. Part, 18 is a bush, 19 is a ram, 20
Is a conductive plate, 21 is an upper die, 22 is a movable part, 23 is a support plate, 24 is a fixed part support spring, 25 is a movable part support spring, 26 is a damper, 27 is a drive circuit, 28 is a mounting surface,
It is.
Claims (1)
設けた可動部と、固定部とを、それぞれ可動部支持ばね
と固定部支持ばねで支持プレートに支持し、前記可動部
を支持する前記可動部支持ばねのばね常数ｋ１と、前記
固定部を支持する前記固定部支持ばねのばね常数ｋ２と
の比を、前記可動部の質量ｍ１と前記固定部の質量ｍ２
との比に等しくすることにより、プレス加工における前
記可動部の変位ｘ１と前記ばね常数ｋ１との積が、前記
固定部の変位ｘ２と前記ばね常数ｋ２との積に等しく、
かつ方向が逆で相殺され、前記支持プレートに作用する
力は前記可動部と前記固定部の重量の和となることを特
徴とする電磁プレス。(57) [Claims 1] In an electromagnetic press, a movable portion provided on a fixed portion so as to be movable up and down and a fixed portion are supported by a support plate by a movable portion support spring and a fixed portion support spring, respectively. The ratio between the spring constant k1 of the movable portion supporting spring that supports the movable portion and the spring constant k2 of the fixed portion supporting spring that supports the fixed portion is determined by calculating the mass m1 of the movable portion and the fixed portion. Mass m2
The product of the displacement x1 of the movable part and the spring constant k1 in the press working is equal to the product of the displacement x2 of the fixed part and the spring constant k2,
An electromagnetic press wherein the directions are reversed and the force acting on the support plate is the sum of the weights of the movable part and the fixed part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13590997A JP3461262B2 (en) | 1997-05-09 | 1997-05-09 | Electromagnetic press |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13590997A JP3461262B2 (en) | 1997-05-09 | 1997-05-09 | Electromagnetic press |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH10305394A JPH10305394A (en) | 1998-11-17 |
| JP3461262B2 true JP3461262B2 (en) | 2003-10-27 |
Family
ID=15162677
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13590997A Expired - Fee Related JP3461262B2 (en) | 1997-05-09 | 1997-05-09 | Electromagnetic press |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3461262B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7870635B2 (en) | 2004-04-01 | 2011-01-18 | Kikuo Yamada | Cleaning tool sheet and cleaning tool |
| KR101493570B1 (en) * | 2012-12-17 | 2015-02-16 | 서강대학교산학협력단 | Magnetic interactual pulling type sheet forming apparatus |
| CN107159763A (en) * | 2017-06-02 | 2017-09-15 | 潘昭恺 | A kind of electromagnetic type stamping machine |
-
1997
- 1997-05-09 JP JP13590997A patent/JP3461262B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH10305394A (en) | 1998-11-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101382178B (en) | Active vibration damping and vibration isolating device and active vibration damping and vibration isolating system | |
| CN112696454B (en) | Magnetic suspension type quasi-zero stiffness electromagnetic vibration isolator with active negative stiffness | |
| JP4485550B2 (en) | Reaction force processing device | |
| JP3461262B2 (en) | Electromagnetic press | |
| EP1214266A1 (en) | Elevator hoisting machine | |
| JP5388054B2 (en) | Elevator with elevator vibration control device | |
| EP0537275B1 (en) | Electromagnetically driven punch press with tools movable in opposite directions and having their momentus balanced at impact | |
| CN211541658U (en) | Extruder for extruding prefabricated wall panel | |
| JP4492904B2 (en) | Slide balance device for press machine | |
| US7000537B2 (en) | Press and machine tool | |
| RU2026792C1 (en) | Electromagnetic press | |
| CN111113068A (en) | Magnetic suspension machine tool guide rail | |
| JP3605125B2 (en) | Linear motor type vibration suppression device | |
| JP2004090031A (en) | Driving device for working device, and working device utilizing the driving device | |
| CN220055186U (en) | Electromagnetic vibration energy recycling feeder | |
| Tanaka et al. | A study of active vibration isolation | |
| JPH0677876B2 (en) | Electromagnetic press machine | |
| CN213166916U (en) | Vibration head of vibration friction welding machine with vibration damper | |
| CN211465482U (en) | Magnetic suspension machine tool guide rail | |
| CN218450526U (en) | Loudspeaker with anti-resonance effect | |
| CN102648126A (en) | Electromagnetic inertial actuator | |
| CN210624040U (en) | Weaving equipment that possesses fixing device | |
| JPH1158089A (en) | Slide part buffering device for electromagnetic press | |
| JP2021186493A (en) | Drum type washing machine | |
| JP2002295574A (en) | Damping device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080815 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080815 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090815 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090815 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100815 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100815 Year of fee payment: 7 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110815 Year of fee payment: 8 |
|
| LAPS | Cancellation because of no payment of annual fees |