JPH07256343A - Method and device for bending sheet and device therefor - Google Patents
Method and device for bending sheet and device thereforInfo
- Publication number
- JPH07256343A JPH07256343A JP4854294A JP4854294A JPH07256343A JP H07256343 A JPH07256343 A JP H07256343A JP 4854294 A JP4854294 A JP 4854294A JP 4854294 A JP4854294 A JP 4854294A JP H07256343 A JPH07256343 A JP H07256343A
- Authority
- JP
- Japan
- Prior art keywords
- bending
- tool
- coining
- sub
- frame
- 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.)
- Pending
Links
Landscapes
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は板金材料に曲げ加工を
行う方法とその方法に用いる曲げ加工装置に関するもの
であり、通常のエア−ベンディング加工方法の他に被加
工材を順次コイニング加工する方法とその方法に使用す
る装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for bending a sheet metal material and a bending apparatus used for the method, and a method for sequentially coining a work material in addition to a normal air-bending method. And an apparatus used for the method.
【０００２】[0002]
【従来の技術】従来から、例えばプレスブレーキ等のご
とき曲げ加工装置を用いて精度の高い曲げ加工を行う場
合には、長尺の雄型（パンチ）の先端部を完全に被加工
材に食い込ませ、雄型（パンチ）と雌型（ダイ）の面圧
によって被加工材のスプリングバックを殺す「コイニン
グ」曲げが行われている。この「コイニング」を行うに
は「ボトミング」（エア−ベンディングの一種で、底押
しまたは底突きなどといわれる）曲げ加工に対して５〜
８倍程度の加圧力が必要である。2. Description of the Related Art Conventionally, when performing a highly accurate bending process using a bending device such as a press brake, the tip of a long male die (punch) is completely cut into the work piece. In addition, "coining" bending is performed to kill the springback of the workpiece by the surface pressure of the male die (punch) and the female die (die). To perform this "coining", "bottoming" (a type of air-bending, which is also called bottom pushing or bottom pushing) 5 to bending
A pressure of about 8 times is required.
【０００３】[0003]
【発明が解決しようとする課題】前述のようにコイニン
グ加工はボトミング加工の５〜８倍程度の加圧力が必要
であるためこれを行うには加圧能力の大きいプレス機械
が必要であり、そのためには機械の強度も大きくしなけ
ればならず、従って機械の価格も高くなるという問題が
あった。As described above, the coining process requires a pressurizing force which is about 5 to 8 times that of the bottoming process, and therefore a press machine having a large pressurizing capacity is required to perform this. However, there is a problem in that the strength of the machine must be increased and therefore the price of the machine is also increased.
【０００４】本発明は機械の能力トン数（板金材料を９
０度に成形出来るときの加圧力を言う）及びプレス機械
の強度を大きくせずに、従来のプレス機械で加工可能な
サイズよりも加工長の長い被加工材または板厚の大きい
材料のコイニング加工が行える新規な曲げ加工の方法
と、その方法に使用する曲げ加工装置を提供するもので
ある。The present invention uses a machine tonnage (sheet metal material of 9 tons).
Coining of a work material with a longer working length or a material with a larger plate thickness than the size that can be processed by a conventional press machine without increasing the strength of the press machine and the strength of the press machine. The present invention provides a novel bending method capable of performing the above, and a bending apparatus used for the method.
【０００５】[0005]
【課題を解決するための手段】上述のごとき従来の問題
に鑑みて、本発明の方法は、（ａ）一対の長尺の曲げ工
具に被加工材を挟持し、ほぼ所定の角度に曲げ加工を行
うベンディング工程と、（ｂ）前記一対の曲げ工具の一
方を他方の曲げ工具側へ凸状に弯曲すべく設けられた複
数の副加圧装置の作動を順次行わせ、該一方の曲げ工具
の一部分を他方の曲げ工具側へ弯曲して材料を順次加圧
して順次コイニングを行う工程と、からなる曲げ方法で
ある。In view of the conventional problems described above, in the method of the present invention, (a) a work material is sandwiched between a pair of long bending tools and bent at a substantially predetermined angle. And (b) sequentially actuating a plurality of sub-pressurizing devices provided to bend one of the pair of bending tools to the other bending tool side in a convex shape, and the one bending tool is bent. Bending part of the other part toward the other bending tool side and sequentially pressing the material to sequentially perform coining.
【０００６】また本発明の曲げ加工装置は、左右の側板
間の適宜一側に固定フレ−ムを取り付け、この固定フレ
−ムと対向する他方の位置に可動フレ−ムを前記固定フ
レ−ムに対し接近離反自在に設けてなる曲げ加工装置に
おいて、前記フレ−ムに取り付けられた長尺の曲げ工具
とフレ−ムとの間に前記曲げ工具を他方の曲げ工具側へ
凸状に弯曲すべく加圧自在の複数の副加圧装置を設けた
構成としたものである。Further, in the bending apparatus of the present invention, a fixed frame is attached to one side between the left and right side plates as appropriate, and the movable frame is provided at the other position facing the fixed frame. In a bending apparatus provided so as to be able to move toward and away from each other, between the long bending tool attached to the frame and the frame, the bending tool is curved in a convex shape toward the other bending tool. Therefore, a plurality of sub-pressurizing devices capable of pressurizing are provided.
【０００７】[0007]
【作用】前記構成により、本発明においては一対の長尺
の曲げ工具の間に板金材料を配置し、この材料を一対の
曲げ工具により挾み込むことにより、材料の曲げ加工を
行うことができる。この際、曲げ工具を凸状に弯曲すべ
く設けた複数の副加圧装置を順次作動することにより、
曲げ工具の１部分のみが凸状に弯曲されて部分的なコイ
ニング加工を行うので、曲げ加工装置としてのプレス機
械の能力トン数および機械の強度を大きくせずに、従来
のプレス機械で加工可能なサイズよりも加工長の長い被
加工材または板厚の大きい材料のコイニング加工が行え
る。With the above construction, in the present invention, the sheet metal material is arranged between the pair of long bending tools, and the material can be bent by sandwiching the material with the pair of bending tools. . At this time, by sequentially operating a plurality of sub-pressurizing devices provided to bend the bending tool in a convex shape,
Since only one part of the bending tool is curved in a convex shape and partial coining is performed, it is possible to process with a conventional press machine without increasing the capacity and tonnage of the press machine as a bending machine. Coining can be performed on workpieces that have a longer working length than other sizes or materials that have a large plate thickness.
【０００８】[0008]
【実施例】さて図面を参照するに図１には、曲げ加工装
置１としてプレスブレ−キの正面図が示してある。曲げ
加工装置１は、左右の側板（９Ｌ、９Ｒ）の上部に固定
フレ−ム１１を取り付け、この固定フレ−ムと対向する
下方に移動フレ−ム５が図示しない主駆動手段（例えば
油圧シリンダ−）により上下動自在に設けられている。
該移動フレ−ム５は安全のため上下に可動の可動カバ−
１３と固定カバ−１５とにより覆われているので図１で
は見えないが、側断面を示す図２にその一部を見ること
ができる。DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring now to the drawings, FIG. 1 shows a front view of a press brake as a bending apparatus 1. In the bending apparatus 1, fixed frames 11 are attached to the upper portions of the left and right side plates (9L, 9R), and a moving frame 5 facing the fixed frames is provided with a main drive means (for example, a hydraulic cylinder) not shown. -) So that it can be moved up and down.
The movable frame 5 is a movable cover that can be moved up and down for safety.
It is not visible in FIG. 1 because it is covered by 13 and the fixed cover 15, but part of it can be seen in FIG. 2 which shows a side cross section.
【０００９】前記固定フレ−ム１１の下端には長尺の曲
げ工具としての雄型（上型）１７が工具ホルダの１例と
しての中間板２２を介して中間板固定部材１９、雄型押
さえ部材２０等により取り付けられている。また、前記
移動フレーム５の上部には、上記雄型１７と協働して板
金材料Ｍの曲げ加工を行う曲げ工具としての雌型（下
型）３が取付けてある。At the lower end of the fixed frame 11, a male die (upper die) 17 as a long bending tool is provided with an intermediate plate fixing member 19 and a male die presser via an intermediate plate 22 as an example of a tool holder. It is attached by the member 20 or the like. Further, a female die (lower die) 3 as a bending tool which cooperates with the male die 17 to bend the sheet metal material M is attached to the upper part of the moving frame 5.
【００１０】より詳細には、図３を参照するに、前記移
動フレ−ム５の上部には雌型３が前記雄型１７に対応す
る位置に複数の副加圧装置３５を介在して装着してあ
る。この複数の副加圧装置３５の構成はみな同一の構成
なので説明は一つの副加圧装置の構成について説明する
ことにする。More specifically, referring to FIG. 3, the female die 3 is mounted on the upper portion of the moving frame 5 at a position corresponding to the male die 17 with a plurality of sub-pressurizing devices 35 interposed therebetween. I am doing it. Since the configurations of the plurality of sub-pressurizing devices 35 are all the same, the description will be made on the configuration of one sub-pressurizing device.
【００１１】副加圧装置３５は、前記移動フレーム５の
上部に取付けられ、かつ内側に左右方向（図３において
は紙面に垂直な方向）に延伸したＴ字状長孔２４を有す
る箱形のハウジング７と、上記長孔２４内に上下動自在
に収容されている受動楔部材２７と、駆動楔部材２５
と、楔部材駆動装置の１例としての油圧シリンダ−２１
と、前記受動楔部材２７に支持されて前記下型３を支持
する型支持部材３３等から構成されている。前記ハウジ
ング７は、図１において曲げ加工装置１の中央ＣＬから
左右の側板（９Ｌ，９Ｒ）近傍まで延伸しており、前記
副加圧装置３５は該ハウジング７の長手方向に左右対称
形に複数箇所に設けてあり、その設置位置は１図に示す
ように、曲げ型の長手方向のほぼ中央ＣＬ或いは曲げ機
械のほぼ中央ＣＬを中心に左右均等な位置（Ａ，Ａ′；
Ｂ，Ｂ′；Ｃ，Ｃ′）に配置するのが好ましい。The sub-pressurizing device 35 is attached to the upper part of the moving frame 5 and has a box shape having a T-shaped elongated hole 24 extending in the left-right direction (direction perpendicular to the paper surface in FIG. 3) inside. The housing 7, the passive wedge member 27 housed in the elongated hole 24 so as to be vertically movable, and the drive wedge member 25.
And a hydraulic cylinder-21 as an example of the wedge member drive device.
And a die support member 33 which is supported by the passive wedge member 27 and supports the lower die 3, and the like. The housing 7 extends from the center CL of the bending device 1 to the vicinity of the left and right side plates (9L, 9R) in FIG. 1, and the plurality of sub-pressurizing devices 35 are symmetrical in the longitudinal direction of the housing 7. As shown in FIG. 1, the installation positions thereof are substantially equal to the center of the bending die in the longitudinal direction or the center of the bending machine (CL).
B, B '; C, C') are preferably arranged.
【００１２】前記ハウジング７内のＴ字状長孔２４に
は、倍力機構部の例としての楔機構をなす一組の楔部材
（２５，２７）が互いの斜面部（２６，２６′）を直線
運動ベアリング（２９，２９′）を介して係合して設け
られ、下方の駆動楔部材２５には油圧駆動のシリンダ−
２１の往復動自在なピストンロッド２３に連結されてい
る。駆動楔部材２５に係合する受動楔部材２７の上部に
は型保持部材３３が前記Ｔ字状長孔２４の外部に開口し
た溝部３０に上下に摺動自在に係合している。なお前記
一組の楔部材は図示しないガイド機構により、ハウジン
グ７の長手方向に対しその位置が変化しないように保持
されている。また駆動楔部材２５の図３における右端部
には該駆動楔部材を左方向に押圧する戻し用のスプリン
グ３１が適宜な手段により設けてある。In the T-shaped long hole 24 in the housing 7, a pair of wedge members (25, 27) forming a wedge mechanism as an example of a booster mechanism portion are provided with slope portions (26, 26 '). Are engaged through linear motion bearings (29, 29 '), and a hydraulically driven cylinder is mounted on the lower drive wedge member 25.
21 is connected to a reciprocating piston rod 23. On the upper portion of the passive wedge member 27 that engages with the drive wedge member 25, a die holding member 33 is engaged with a groove portion 30 opened to the outside of the T-shaped elongated hole 24 so as to be vertically slidable. The pair of wedge members are held by a guide mechanism (not shown) so that their positions do not change in the longitudinal direction of the housing 7. At the right end portion of the drive wedge member 25 in FIG. 3, a return spring 31 for pressing the drive wedge member leftward is provided by an appropriate means.
【００１３】また曲げ加工装置の副加圧装置において、
加圧手段の楔機構の駆動機構に油圧シリンダ−を用いた
事によりコイニング加工に必要な適宜な加圧力を容易に
得られるようにした。この楔機構の駆動手段には油圧シ
リンダ−以外にエア−シリンダ−、その他種々の電動モ
−タまたは油圧モ−タ等とねじ駆動の組み合わせなども
利用可能である。或いは倍力機構部に流体圧シリンダ−
を直接的に用いて雌型の一部分を加圧自在の副加圧装置
を構成する事も可能である。In the sub-pressurizing device of the bending device,
By using a hydraulic cylinder as the drive mechanism of the wedge mechanism of the pressing means, it is possible to easily obtain an appropriate pressing force required for coining. In addition to the hydraulic cylinder, an air cylinder may be used as the driving means of the wedge mechanism, and various electric motors or hydraulic motors may be used in combination with a screw drive. Alternatively, the booster mechanism has a fluid pressure cylinder
It is also possible to construct a sub-pressurizing device that can directly press a part of the female mold by directly using.
【００１４】上記構成において、コイニング加工で精密
な９０度曲げをなすには、先ず型溝３Ｖが９０°の雌型
３上に被加工材の板金材料Ｍを載置し、次に図示しない
位置決め装置により前後方向（図２において左右方向）
の位置決めを行って曲げ位置を決定する。ついで主駆動
手段を作動させ、移動フレ−ム５を上昇作動させて固定
フレ−ム１１の下端部に取り付けた雄型１７と雌型３と
の間に挟持された被加工材の全長にわたりボトミング加
工を行う。この工程で被加工材は、ほぼ９０°の曲げ加
工が終了する。In the above structure, in order to perform precise 90-degree bending by coining, first, the sheet metal material M to be processed is placed on the female die 3 having the die groove 3V of 90 °, and then the positioning (not shown) is performed. Front-back direction by device (left-right direction in Fig. 2)
The positioning is performed to determine the bending position. Then, the main driving means is operated to move the moving frame 5 upward so that the work frame held between the male die 17 and the female die 3 attached to the lower end of the fixed frame 11 is bottomed over the entire length thereof. Perform processing. In this process, the material to be processed is bent by about 90 °.
【００１５】次に被加工材Ｍを挟持した状態のまま副加
圧装置３５を前記曲げ金型３，１７の長手方向の中央部
分から両端部方向へ、または両端部から中央部方向へ少
なくとも対称位置の一組ずつを順次加圧、減圧して金型
３の１部分を上方向へ凸状になるように弯曲せしめて被
加工材の一部分ずつのコイニング加工を実施する。この
逐次加圧、減圧のコイニング加工によれば被加工材のコ
イニング加工中の部分の加工長が小さいので従来のよう
に被加工材の全長に渡るコイニング加工に比較して著し
く少ない加圧力で済むという利点がある。Next, the sub-pressurizing device 35 is at least symmetrical with respect to the longitudinal center portions of the bending dies 3 and 17 toward both end portions, or from both end portions toward the central portion while the workpiece M is sandwiched. Each pair of positions is sequentially pressurized and depressurized to bend one portion of the die 3 so as to be convex upward, and coining is performed for each portion of the workpiece. According to the coining process of sequential pressurization and depressurization, the processing length of the portion of the workpiece being coined is small, so that a significantly smaller pressing force is required as compared with the conventional coining over the entire length of the workpiece. There is an advantage.
【００１６】上記の構成において、油圧シリンダ−２１
に図示しない油圧源からコイニング加工に必要な油圧を
公知の油圧切り替え弁手段（図示省略）を介して供給す
れば、図３において駆動楔部材２５が右方向に移動し、
受動楔部材２７が上方に持ち上げられる。この時の力は
楔の斜面の角度により変化するが本実施例ではテ−パ比
を例えば望ましくは、１／１００としたので約１００倍
の増幅率となり、雌型３は雌型支持部材３３を介し上方
に上昇することになる。In the above structure, the hydraulic cylinder-21
When a hydraulic pressure required for coining is supplied from a hydraulic pressure source (not shown) through a known hydraulic switching valve means (not shown), the drive wedge member 25 moves to the right in FIG.
The passive wedge member 27 is lifted up. The force at this time varies depending on the angle of the slope of the wedge, but in the present embodiment, the taper ratio is preferably 1/100, so that the amplification factor is about 100 times, and the female die 3 is the female die supporting member 33. It will rise upwards through.
【００１７】一例として、材質がＳＰＣＣ，板厚１．６
mm，Ｖ副１０mm，角度９０°の条件で、曲げ長さが１ｍ
を曲げる場合、通常のコイニング加工では、約７５トンが
必要であるのに対し、本発明の方法の場合、副加圧装置
３５の楔の幅寸法が５０mm，の場合、約３．２５トンとな
り、約１／２０で済むことになる。As an example, the material is SPCC and the plate thickness is 1.6.
Bending length is 1m under conditions of mm, V 10mm, angle 90 °
In the case of bending, the ordinary coining process requires about 75 tons, whereas in the case of the method of the present invention, when the width dimension of the wedge of the sub-pressurizing device 35 is 50 mm, about 3.25 tons. It will be about 1/20.
【００１８】なお、本実施例では一組の楔部材（２５，
２７）の斜面部（２６，２６′）に直線運動ベアリング
（２９，２９′）を介在させているが、必ずしも直線運
動ベアリングが必要であるのではなく、接触部分の摩擦
抵抗を低下させることに意味が在るのであって、摩擦抵
抗を低下させる物質を摩擦面に塗布またはコ−ティング
してもよい。例えば通常の潤滑油、二硫化モリブデンを
含む潤滑剤、テフロンコ−ティングなどを行っても同様
な効果が期待できる。In this embodiment, a pair of wedge members (25,
Although the linear motion bearings (29, 29 ') are interposed in the inclined surface portions (26, 26') of (27), the linear motion bearings are not always necessary, and the friction resistance of the contact portion is reduced. It makes sense, and a substance that reduces frictional resistance may be applied or coated on the friction surface. For example, the same effect can be expected by applying a normal lubricating oil, a lubricant containing molybdenum disulfide, Teflon coating, or the like.
【００１９】[0019]
【発明の効果】以上のごとき実施例の説明より理解され
るように、本発明によれば、コイニング加工時に、材料
の全長に亘って同時にコイニング加工を行うものではな
く、材料の１部分毎コイニング加工を順次行う構成であ
るから、加圧能力が小さなプレス機械の場合でも実施で
きる。As can be understood from the above description of the embodiments, according to the present invention, coining is not performed simultaneously over the entire length of the material at the time of coining, but every part of the material is coined. Since the processing is performed sequentially, it can be performed even in the case of a press machine having a small pressurizing ability.
【図１】本発明に係わる曲げ加工装置の実施例を示す正
面図である。FIG. 1 is a front view showing an embodiment of a bending apparatus according to the present invention.
【図２】本発明に係わる曲げ加工装置の実施例を示す左
側面図である。FIG. 2 is a left side view showing an embodiment of the bending apparatus according to the present invention.
【図３】本発明に係わる曲げ加工装置の実施例を示す図
１におけるＩＩＩ−ＩＩＩに沿った拡大断面図である。FIG. 3 is an enlarged cross-sectional view taken along the line III-III in FIG. 1 showing an embodiment of the bending apparatus according to the present invention.
１ 曲げ加工装置 ３ 曲げ工具 ５ 可動フレ−ム ７ ハウジング ９Ｌ 左側板 ９Ｒ 右側板 １１ 固定フレ−ム １７ 曲げ工具 ２５ 移動楔部材 ２７ 固定楔部材 Ｍ 被加工材 ３５ 副加圧装置 1 Bending device 3 Bending tool 5 Movable frame 7 Housing 9L Left side plate 9R Right side plate 11 Fixed frame 17 Bending tool 25 Moving wedge member 27 Fixed wedge member M Workpiece material 35 Sub-pressurizing device
Claims (7)
材料の曲げ加工方法 （ａ）一対の長尺の曲げ工具に被加工材を挟持し、ほぼ
所定の角度に曲げ加工を行うベンディング工程。 （ｂ）前記一対の曲げ工具の一方を他方の曲げ工具側へ
凸状に弯曲すべく設けられた複数の副加圧装置の作動を
順次行わせ、該一方の曲げ工具の一部分を他方の曲げ工
具側へ弯曲して順次加圧して材料を順次コイニングを行
う工程。1. A method of bending a sheet metal material, which comprises the following steps: (a) A bending step in which a work material is sandwiched between a pair of long bending tools and bent at a substantially predetermined angle. . (B) A plurality of sub-pressurizing devices provided to bend one of the pair of bending tools toward the other bending tool in a convex shape are sequentially operated, and a part of the one bending tool is bent to the other. The process of bending the material to the tool side and sequentially pressing the material to sequentially coin the material.
手方向の中央側から該工具の長手方向の両端部に向けて
行う事を特徴とする請求項１に記載の曲げ加工方法。2. The bending method according to claim 1, wherein the coining operation is performed from the center side in the longitudinal direction of the bending tool toward both ends in the longitudinal direction of the tool.
手方向の両端側から該工具の中央側に向けて行う事を特
徴とする請求項１に記載の曲げ加工方法。3. The bending method according to claim 1, wherein the coining operation is performed from both end sides in the longitudinal direction of the bending tool toward the center side of the tool.
装置の作動を対称位置の一組ずつ順次行わせる事を特徴
とする請求項１または請求項２または請求項３に記載の
曲げ加工方法。4. The bending method according to claim 1, 2 or 3, wherein the coining step sequentially activates the plurality of sub-pressurizing devices in pairs at symmetrical positions. .
レ−ムを取り付け、この固定フレ−ムと対向する他方の
位置に可動フレ−ムを前記固定フレ−ムに対し接近離反
自在に設けてなる曲げ加工位置において、上記フレーム
に装着した長尺の曲げ工具とフレ−ムとの間に前記曲げ
工具を他方の曲げ工具側へ凸状に弯曲すべく加圧自在の
複数の副加圧装置を設けた事を特徴とする曲げ加工装
置。5. A fixed frame is attached to one of the upper and lower sides between the left and right side plates, and the movable frame is freely moved toward and away from the fixed frame at the other position facing the fixed frame. At a bending position provided in the frame, between the long bending tool mounted on the frame and the frame, a plurality of sub-pressurizable sub-assemblies for bending the bending tool to the other bending tool side in a convex shape. A bending machine characterized by having a pressure device.
加圧する倍力機構部に楔機構を用いた事を特徴とする請
求項５に記載の曲げ加工装置。6. The bending apparatus according to claim 5, wherein the sub-pressurizing device uses a wedge mechanism for a boosting mechanism portion that pressurizes the bending tool to bend the bending tool.
リンダ−を用いた事を特徴とする請求項６に記載の曲げ
加工装置。7. The bending apparatus according to claim 6, wherein a fluid pressure cylinder is used for the boosting mechanism portion of the sub-pressurizing device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4854294A JPH07256343A (en) | 1994-03-18 | 1994-03-18 | Method and device for bending sheet and device therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4854294A JPH07256343A (en) | 1994-03-18 | 1994-03-18 | Method and device for bending sheet and device therefor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07256343A true JPH07256343A (en) | 1995-10-09 |
Family
ID=12806264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4854294A Pending JPH07256343A (en) | 1994-03-18 | 1994-03-18 | Method and device for bending sheet and device therefor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07256343A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001089065A1 (en) * | 2000-05-18 | 2001-11-22 | Mitsui High-Tec. Inc. | Method of producing laminated iron cores |
| JP2006026637A (en) * | 2004-07-12 | 2006-02-02 | Nippon Steel Corp | Hot pressing method and pressing apparatus |
| JP2013180340A (en) * | 2012-03-05 | 2013-09-12 | Amada Co Ltd | Press brake |
| KR101985973B1 (en) * | 2018-11-26 | 2019-06-05 | 기득산업 주식회사 | A Clamping Device for Hot Forming Method for Forming Curvature |
| KR20200091610A (en) * | 2019-01-23 | 2020-07-31 | 주식회사 일우산업기계 | A mold clamping device of bending machine |
| JPWO2020262669A1 (en) * | 2019-06-28 | 2020-12-30 |
-
1994
- 1994-03-18 JP JP4854294A patent/JPH07256343A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2001089065A1 (en) * | 2000-05-18 | 2001-11-22 | Mitsui High-Tec. Inc. | Method of producing laminated iron cores |
| US6718616B2 (en) | 2000-05-18 | 2004-04-13 | Mitsui High-Tec, Inc. | Method of producing laminated iron cores |
| JP2006026637A (en) * | 2004-07-12 | 2006-02-02 | Nippon Steel Corp | Hot pressing method and pressing apparatus |
| JP4551144B2 (en) * | 2004-07-12 | 2010-09-22 | 新日本製鐵株式会社 | Hot press method |
| JP2013180340A (en) * | 2012-03-05 | 2013-09-12 | Amada Co Ltd | Press brake |
| KR101985973B1 (en) * | 2018-11-26 | 2019-06-05 | 기득산업 주식회사 | A Clamping Device for Hot Forming Method for Forming Curvature |
| KR20200091610A (en) * | 2019-01-23 | 2020-07-31 | 주식회사 일우산업기계 | A mold clamping device of bending machine |
| JPWO2020262669A1 (en) * | 2019-06-28 | 2020-12-30 |
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