JPH0523755A - Punching method for metallic plate and die - Google Patents
Punching method for metallic plate and dieInfo
- Publication number
- JPH0523755A JPH0523755A JP18123891A JP18123891A JPH0523755A JP H0523755 A JPH0523755 A JP H0523755A JP 18123891 A JP18123891 A JP 18123891A JP 18123891 A JP18123891 A JP 18123891A JP H0523755 A JPH0523755 A JP H0523755A
- Authority
- JP
- Japan
- Prior art keywords
- punching
- die
- punch
- shearing
- metal plate
- 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.)
- Withdrawn
Links
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、金属板の打抜き加工方
法および金型に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for punching a metal plate and a die.
【０００２】[0002]
【従来の技術】自動車部品などを製造するための金属板
プレス加工では、プレス装置によるピアス穴抜きやトリ
ミングなどの打抜き加工工程が必ず含まれる。しかし、
一般には、打抜き時の剪断端面にかえり（以下、バリと
称する）が生じ、このバリが高くなると部品同士の組み
合わせ不良を生じさせたり、塗装時に塗料の乗りを悪く
して耐蝕性を損なうなどの悪影響を及ぼす。2. Description of the Related Art Pressing a metal plate for manufacturing automobile parts and the like always includes a punching process such as piercing and trimming by a press machine. But,
Generally, a burr (hereinafter referred to as a burr) occurs on the sheared end surface during punching, and if this burr becomes high, it may cause a defective combination of parts, or the paint may not ride well at the time of coating, resulting in deterioration of corrosion resistance. Adversely affect.
【０００３】このため従前から、金属板の打抜き加工で
生じるバリの高さを許容値内に納めるために金型のクリ
アランスを厳しくしたり、切刃の摩耗管理を厳重にする
ことなどが行われているが、これは金型形状や部品形状
などにより必ずしも十分に行えるものではない。実際に
は、金型の加工や組立て、プレス装置への取り付け上の
精度的な問題から、特に異形輪郭の打抜き金型などの場
合には、全体を一定のクリアランスに仕上げることは非
常に困難で、部分的に大きなクリアランスとなることが
避けられないため、成形品の一部に許容範囲外のバリを
発生させることが多い。また、これを防ぐためにクリア
ランスを小さくすればするほど刃先の摩耗が増大し、更
にはチッピング等の重大なトラブルを招く可能性が大き
くなる。一方、打抜き加工時に生じたバリを、研磨や研
削などによる別の工程で除去することも行われている
が、この場合では工程数が増すだけでなく、必ずしも全
てのバリが除去できないという問題点を含んでいる。Therefore, in order to keep the height of the burr generated by punching a metal plate within an allowable value, the mold clearance has been made strict and the wear control of the cutting edge has been made strict. However, this is not always possible due to the shape of the mold and the shape of the parts. In practice, it is very difficult to finish the entire product to a certain clearance, especially in the case of a die with a contoured contour, because of precision problems in machining and assembling the die and mounting it on the press machine. Since a large clearance is unavoidable in some cases, a burr outside the allowable range is often generated in a part of the molded product. Further, as the clearance is reduced in order to prevent this, the wear of the cutting edge increases, and the possibility of causing serious trouble such as chipping increases. On the other hand, burrs generated during punching are also removed in another step such as polishing or grinding, but in this case not only the number of steps is increased, but also all burrs cannot be removed. Is included.
【０００４】[0004]
【発明が解決しようとする課題】そこで、これら問題点
を解決するために、従来より各方面から種々の検討が加
えられ、例えば、次に述べるような精密剪断法や上下打
抜き法、更には平押し法などが提案されている。しかし
ながら、これら方法には、複雑な金型やプレス装置が必
要であったり、剪断工程が複数工程になったりする欠点
がある。In order to solve these problems, various studies have heretofore been made in various fields. For example, the precision shearing method and the vertical punching method described below, and further Pushing methods have been proposed. However, these methods have drawbacks in that a complicated mold and a pressing device are required and the shearing step is performed in multiple steps.
【０００５】例えば、特開平1-293922号公報では、ポン
チないしはダイの片側の切刃に半径0.2mmないし加工板
の板厚程度の丸み、または面取りを施してなる金型を用
いて精密に打抜き加工する方法が提案されている。しか
し、この方法では工具の刃先に所定の丸みを加工するこ
とや、その丸みを維持することが非常に困難である。For example, in Japanese Laid-Open Patent Publication No. 1-293922, a punch or a die having one side has a radius of 0.2 mm or a rounded plate having a radius of about 0.2 mm or a thickness of a machined plate, or a chamfered die is used for precision punching. A method of processing has been proposed. However, with this method, it is very difficult to form a predetermined roundness on the cutting edge of the tool and to maintain the roundness.
【０００６】また、特開昭63−157728号および特開昭63
−157729号公報では、マグネトロンのボールピース等の
プレス加工において、成形後の周縁部の剪断に際し、ス
トリッパーに傾斜を設けたり、周縁部に曲げ加工を施す
ことでプッシュバック工程でのバリの発生を防止する方
法が提案されている。しかし、この方法は剪断後のプッ
シュバック工程におけるバリの発生を防止するためのも
ので、剪断時のバリの低減にはならず、しかも金型の構
成が非常に複雑になるという問題点がある。Further, JP-A-63-157728 and JP-A-63-157728
In the -157729 publication, in press working of a magnetron ball piece or the like, when shearing the peripheral edge after molding, the stripper is provided with an inclination or the peripheral edge is bent to prevent burrs from being generated in the pushback process. Methods to prevent it have been proposed. However, this method is intended to prevent the generation of burrs in the pushback step after shearing, and it does not reduce burrs at the time of shearing, and has the problem that the structure of the mold becomes very complicated. .
【０００７】また、特開昭64-34525号公報では、縁抜き
工程を有する絞り加工において、ダイおよび該ダイより
僅かに大きい径のポンチにより部材を境界部を薄肉にし
て製品とスクラップとに区別し、その後のダンブリング
工程でバリを完全に除去する方法が提案されている。し
かし、この方法によれば、ポンチ径がダイ径より僅かに
大きため、ポンチ下死点の制御を精密に行わないとダイ
との接触で金型の破損や、破損物の飛散による災害を招
く可能性があり好ましくない。Further, in Japanese Patent Laid-Open No. 64-34525, in the drawing process having an edging process, a die and a punch having a diameter slightly larger than that of the die are used to make a boundary portion of a member thin so that a product and a scrap are distinguished from each other. Then, a method of completely removing the burr in the subsequent tumbling process has been proposed. However, according to this method, since the punch diameter is slightly larger than the die diameter, unless the punch bottom dead center is precisely controlled, the die may be damaged by contact with the die, and a disaster may be caused by scattering of the damaged material. There is a possibility that it is not preferable.
【０００８】本発明は、上記の従来技術の問題点を解消
すべくなされたものであって、金属板を打抜き加工する
について、複雑な構成のプレス装置を必要とせず、かつ
特別に厳密なクリアランスや刃先の管理も要さない極一
般的で簡易な構成の金型にて、バリの発生を抑制できる
金属板の打抜き加工方法および金型を提供することを目
的とするものである。The present invention has been made to solve the above-mentioned problems of the prior art, and does not require a pressing device having a complicated structure for punching a metal plate, and has a particularly strict clearance. It is an object of the present invention to provide a metal plate punching method and a metal mold that can suppress the occurrence of burrs with a metal mold having an extremely general and simple structure that does not require management of the blade edge.
【０００９】[0009]
【課題を解決するための手段】上記の目的を達成するた
めに、本発明は以下の構成とされている。すなわち、本
発明に係る金属板の打抜き加工方法は、ポンチとダイを
用いた金属板の打抜き加工において、ポンチの切刃によ
る打抜き剪断に先立ち、金属板の打抜き対象部の剪断予
定線より内方に位置する部位を打抜き方向に張り出させ
て、該金属板の剪断予定線部にダイ肩による曲げ変形を
加えることを特徴とする。In order to achieve the above object, the present invention has the following constitution. That is, the punching method of the metal plate according to the present invention is, in the punching process of the metal plate using the punch and the die, prior to the punching shearing by the cutting edge of the punch, inward from the planned shear line of the punching target portion of the metal plate. It is characterized in that the portion located at is protruded in the punching direction and bending deformation due to the die shoulder is applied to the planned shear line portion of the metal plate.
【００１０】また、本発明に係る金属板の打抜き金型
は、ポンチとダイとを備えてなる金属板の打抜き金型に
おいて、前記ポンチが、その先端面に打抜き形状より小
さな形状の突出部を有してなることを特徴とする。Further, a metal plate punching die according to the present invention is a metal plate punching die comprising a punch and a die, wherein the punch has a protrusion having a shape smaller than the punching shape on its tip end surface. It is characterized by having.
【００１１】[0011]
【作用】金属材料の剪断加工についてはこれまで多くの
研究があるように、被加工材に工具の刃先を食い込ませ
ることによりなされ、その食い込み量がある限界を超す
と刃先より亀裂を生じ分離に至る。この時の応力状態に
ついての詳細な解析結果より、亀裂は材料内に生じる応
力の関係で、その説明図である〔図３〕に示すように、
刃先から少し工具側に入ったところで生じることが判っ
ている。この結果、剪断分離した製品の切り口には必ず
バリが生じることになる。[Function] As many studies have been done so far on shearing of metallic materials, it is done by making the cutting edge of the tool bite into the work material, and if the biting amount exceeds the limit, cracks will occur from the cutting edge and separation will occur. Reach From the detailed analysis result of the stress state at this time, the crack is related to the stress generated in the material, and as shown in FIG.
It is known that it occurs just a little bit from the cutting edge to the tool side. As a result, burrs are always generated at the cut end of the product separated by shearing.
【００１２】このようなバリの発生機構から判るよう
に、通常の剪断加工を行う限り、バリの発生は避けられ
ないが、バリの発生に及ぼす要因はかなり多い。加工条
件としては〔図４〕のグラフに示すように金型のクリア
ランスや、刃先の摩耗が大きく影響するが、材料要因と
しては被加工材の材料強度が影響する。材料強度は延性
と強位の関係があり、材料強度が低いほど延性が高ま
り、亀裂の発生が刃先からより工具側へ離れたところで
発生し、バリが生じ易くなる。As can be seen from the burr formation mechanism, burr formation is inevitable as long as normal shearing is performed, but there are many factors that affect burr formation. As the processing conditions, as shown in the graph of FIG. 4, the clearance of the die and the wear of the cutting edge have a great influence, but the material factor is the material strength of the work material. The material strength has a relationship between ductility and strength. The lower the material strength is, the higher the ductility is, and cracks are generated at a position farther from the cutting edge toward the tool side, and burrs are easily generated.
【００１３】本発明者は、この点に注目し、剪断の開始
前、つまり工具の刃先が被加工材に食い込む前に、被加
工材の剪断予定部を硬化させて延性を劣化させておくこ
とでバリの発生を抑制でき、また、被加工材の剪断予定
部を硬化させるについては、該部位に塑性歪みを与えて
加工硬化させることで達成できるとの知見を得、この知
見に基づいて本発明を完成させたのである。すなわち、
本発明方法では、ポンチの切刃による打抜き剪断に先立
ち、金属板の打抜き対象部の剪断予定線より反製品側に
位置する部位を打抜き方向に張り出させて、該金属板の
剪断予定線部にダイ肩による曲げ変形を加えるので、該
部位の材料を曲げ変形による塑性歪で加工硬化させて、
ポンチの切刃で打抜き剪断する際のバリの発生を抑制す
ることができる。The present inventor pays attention to this point, and before the start of shearing, that is, before the cutting edge of the tool bites into the material to be processed, the portion to be sheared is hardened to deteriorate the ductility. It is possible to suppress the occurrence of burrs with, and to harden the shearing part of the work material, we obtained the knowledge that it can be achieved by giving a plastic strain to the site and work hardening, and based on this finding The invention was completed. That is,
In the method of the present invention, prior to punching and shearing by the cutting edge of the punch, a portion of the metal plate located on the anti-product side from the planned shearing line of the punching target portion is projected in the punching direction, and the planned shearing line portion of the metal plate is provided. Since bending deformation due to the die shoulder is added to, the material of the part is work hardened by plastic strain due to bending deformation,
It is possible to suppress the occurrence of burrs when punching and shearing with the cutting edge of the punch.
【００１４】また、本発明の金型では、ポンチの先端面
に打抜き形状より小さな形状の突出部を有するので、こ
のポンチの切刃による打抜き剪断に先立ち、金属板の打
抜き対象部の剪断予定線より内方に位置する部位を、先
端面に有する突出部によって打抜き方向に張り出させ
て、当該金属板の剪断予定線部にダイ肩による曲げ変形
を加え、該部位の材料を曲げ変形による塑性歪で加工硬
化させて、ポンチの切刃で打抜き剪断する際のバリの発
生を抑制することができる。Further, in the die of the present invention, the punch has a projecting portion having a shape smaller than the punched shape on the tip end surface thereof. Therefore, prior to the punching shearing by the cutting blade of the punch, the planned shear line of the punched portion of the metal plate is formed. The part located more inward is overhanged in the punching direction by the protruding part on the tip surface, bending deformation is applied to the planned shear line part of the metal plate by the die shoulder, and the material of the part is plasticized by bending deformation. It is possible to suppress the occurrence of burrs when work-hardening by strain and punching and shearing with the cutting edge of the punch.
【００１５】[0015]
【実施例】以下に、本発明の実施例を図面を参照して説
明する。〔図１〕は本発明の実施例の金型および同金型
による金属板の打抜き加工の概要説明図である。Embodiments of the present invention will be described below with reference to the drawings. [FIG. 1] is a schematic explanatory view of a die according to an embodiment of the present invention and punching of a metal plate by the die.
【００１６】本例の金型の構成を〔図１〕の (a)図によ
り説明すると、本実施例の金型は、下端面に打抜き形状
より小さな形状の突出部(1a)を設けたポンチ(1) と、ス
トッパー(2) と、ダイ(3) とを備えてなり、ポンチ(1)
の下端に突出部(1a)を設けた点を除き、極一般的な構成
とされている。また、この金型は、常套のプレス装置に
取り付けられる。なお、同図において、Ｐは被加工材と
しての金属板であって、この金属板Ｐはダイ(3) 上に載
置されて打抜き加工を受ける。The structure of the die of this example will be described with reference to FIG. 1 (a). The die of this example has a punch having a protrusion (1a) smaller than the punched shape on the lower end surface. Comprises (1), stopper (2) and die (3), punch (1)
It has a very general configuration except that a protrusion (1a) is provided at the lower end of the. Also, this mold is attached to a conventional press machine. In the figure, P is a metal plate as a workpiece, and the metal plate P is placed on the die (3) and punched.
【００１７】次に、〔図１〕の (b)図乃至 (d)図により
金属板Ｐの打抜き加工の過程を説明する。先ず、(b) 図
に示すように、ストッパー(2) を下降させて金属板Ｐを
ダイ(3) との間に挟んで保持する。また、続いてポンチ
(1) を下降させる。Next, the process of punching the metal plate P will be described with reference to FIGS. 1 (b) to (d). First, as shown in (b), the stopper (2) is lowered to sandwich and hold the metal plate P with the die (3). Also, continue to punch
(1) is lowered.
【００１８】ポンチ(1) が下降して行くと、 (c)図に示
すように、このポンチ(1) 下端の突出部(1a)によって、
金属板Ｐの打抜き対象部の剪断予定線より内方に位置す
る部位が下方に向けて張り出し、この金属板Ｐの剪断予
定線部にダイ肩による曲げ変形を加えられる。そして、
この曲げ変形による塑性歪によって、当該金属板Ｐの剪
断予定部の材料が硬化し、延性が劣化した状態となる。When the punch (1) descends, as shown in (c), the protrusion (1a) at the lower end of the punch (1) causes
A portion of the metal plate P, which is located inward of the planned shear line of the portion to be punched, projects downward, and the planned shear line portion of the metal plate P is subjected to bending deformation by the die shoulder. And
Due to the plastic strain due to this bending deformation, the material of the portion to be sheared of the metal plate P is hardened and the ductility is deteriorated.
【００１９】更にポンチ(1) が下降して行くと、 (d)図
に示すように、このポンチ(1) の周縁に形成された切刃
が金属板Ｐに食い込んで剪断が開始され、その後は通常
の打抜き加工と同様の剪断を受けるが、本例において
は、当該金属板Ｐの剪断予定部の材料の延性が劣化して
いるため、剪断亀裂は切刃の刃先により近づいたところ
で発生することになり、その結果、バリの発生は非常に
小さく抑えられる。When the punch (1) further descends, as shown in (d), the cutting edge formed on the periphery of the punch (1) bites into the metal plate P to start shearing. Undergoes the same shearing as in ordinary punching, but in this example, since the ductility of the material in the shearing scheduled portion of the metal plate P has deteriorated, shear cracking occurs at a position closer to the cutting edge of the cutting blade. As a result, the occurrence of burrs can be suppressed to a very small level.
【００２０】続いて、上記の構成のもとで、厚さ 0.7mm
の冷延軟鋼板に対して直径10mmの穴形状の打抜き加工を
行った具体的な実施例について説明する。Next, under the above-mentioned structure, the thickness is 0.7 mm.
A specific example in which the cold-rolled mild steel sheet of (1) is punched into a hole shape having a diameter of 10 mm will be described.
【００２１】金型としては、直径10mmの切刃をもち、そ
の下端面に直径を 6mmとし、高さを1.5mmおよび 3.0mm
とした突出部を設けた２種類のポンチと、それぞれの抜
き穴の直径を 10.10mm、 10.15mm、 10.24mmおよび 10.
32mmとした４種類のダイとを組み合わせたものを用い
た。また、比較のために、直径10mmの切刃をもち、その
下端面に突出部を設けていない従来形のポンチを、上記
４種類のダイとを組み合わせた金型を用いて、上記と同
じ冷延軟鋼板に対して同様に直径10mmの丸穴形状の打抜
き加工を行った。The mold has a cutting blade with a diameter of 10 mm, the lower end surface has a diameter of 6 mm, and heights of 1.5 mm and 3.0 mm.
Two punches with the protrusions and the diameter of each punch hole are 10.10mm, 10.15mm, 10.24mm and 10.
A combination of 4 types of dies with a size of 32 mm was used. For comparison, a conventional punch having a cutting edge with a diameter of 10 mm and having no protruding portion on its lower end surface was used to cool the same as above using a die combined with the above four types of dies. In the same way, punching of a round hole shape with a diameter of 10 mm was performed on a rolled mild steel sheet.
【００２２】これらの結果を、クリアランスとバリ高さ
の関係に整理し、〔図２〕のグラフに対比して示す。な
お、同図のグラフにおいて、実線の曲線Ａは高さ 3.0mm
の突出部を設けたポンチによる本例、一点鎖線の曲線Ｂ
は高さ 1.5mmの突出部を設けたポンチを用いた本例、破
線の曲線Ｃは比較例の結果をそれぞれ示す。These results are summarized in the relationship between clearance and burr height and shown in comparison with the graph of FIG. In the graph in the figure, the solid curve A has a height of 3.0 mm.
In this example, the punch B is provided with the protruding portion of
Shows the result of the present example using a punch provided with a protrusion having a height of 1.5 mm, and the broken line curve C shows the result of the comparative example.
【００２３】同図のグラフに明らかなように、本実施例
の打抜き加工よるものは、いずれのクリアランスにおい
ても比較例のものよりバリ高さが小さく、しかもクリア
ランスが大な場合ほどその差が大きく現れ、これにより
本発明方法および金型の優れた効果を確認することがで
きた。As is clear from the graph in the figure, the punching process of this example has a smaller burr height than the comparative example at any clearance, and the greater the clearance, the greater the difference. From this, it was possible to confirm the excellent effects of the method and mold of the present invention.
【００２４】なお、上記実施例では、単純な丸穴形状の
打抜き加工を行う例について説明したが、これは一例で
あって、本発明はこの例に限定されるものでなく、複雑
な形状の穴の打抜きや、複雑な外郭形状の成形品のトリ
ミングなどにも適用できることは言うまでもない。In the above embodiment, an example in which simple round hole punching is performed has been described, but this is an example, and the present invention is not limited to this example, and a complex shape is not required. It goes without saying that it can also be applied to punching holes and trimming molded products with complicated outer shapes.
【００２５】[0025]
【発明の効果】以上に述べたように、本発明に係る金属
板の打抜き加工方法および金型によれば、複雑な構成の
プレス装置を必要とすることなく、かつ特別に厳密なク
リアランスや刃先の管理を要さない極一般的で簡易な金
型構成にて、金属板の打抜き加工によるバリの発生を抑
制できて、工業的価値の高い実効を得ることができる。As described above, according to the metal plate punching method and die of the present invention, there is no need for a pressing device having a complicated structure, and the clearance and the cutting edge are particularly strict. With a very general and simple mold configuration that does not require the management of, it is possible to suppress the occurrence of burrs due to the punching process of the metal plate, and to obtain an effect of high industrial value.
【図１】本発明の実施例の金型および同金型による金属
板の打抜き加工の概要説明図である。FIG. 1 is a schematic explanatory diagram of a die according to an embodiment of the present invention and a punching process of a metal plate by the die.
【図２】本発明の実施例に関わるクリアランスとバリ高
さの関係を示すグラフである。FIG. 2 is a graph showing a relationship between clearance and burr height according to an embodiment of the present invention.
【図３】金属材料の剪断加工におけるバリの発生機構の
説明図である。FIG. 3 is an explanatory diagram of a burr generation mechanism in shearing a metal material.
【図４】金属材料の剪断加工における金型のクリアラン
スとバリの高さとの関係を示すグラフである。FIG. 4 is a graph showing the relationship between the clearance of a mold and the height of burrs in shearing a metal material.
(1) --ポンチ (1a)--突出部 (2) --ストッパー (3) --ダイ Ｐ --金属板 (1) --Punch (1a)-projection (2) --Stopper (3) --Die P --Metal plate
Claims (2)
工において、ポンチの切刃による打抜き剪断に先立ち、
金属板の打抜き対象部の剪断予定線より反製品側に位置
する部位を打抜き方向に張り出させて、該金属板の剪断
予定線部にダイ肩による曲げ変形を加えることを特徴と
する金属板の打抜き加工方法。1. In punching a metal plate using a punch and a die, prior to punching and shearing with a cutting edge of the punch,
A metal plate characterized in that a portion of the metal plate that is located on the side opposite to the product to be sheared of the portion to be punched is projected in the punching direction, and the portion to be sheared of the metal plate is subjected to bending deformation by a die shoulder. Punching method.
抜き金型において、前記ポンチが、その先端面に打抜き
形状より小さな形状の突出部を有してなることを特徴と
する金属板の打抜き金型。2. A punching die for a metal plate comprising a punch and a die, wherein the punch has a protrusion having a shape smaller than the punched shape on the tip surface thereof. Punching die.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18123891A JPH0523755A (en) | 1991-07-22 | 1991-07-22 | Punching method for metallic plate and die |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18123891A JPH0523755A (en) | 1991-07-22 | 1991-07-22 | Punching method for metallic plate and die |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0523755A true JPH0523755A (en) | 1993-02-02 |
Family
ID=16097217
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18123891A Withdrawn JPH0523755A (en) | 1991-07-22 | 1991-07-22 | Punching method for metallic plate and die |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0523755A (en) |
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1621268A1 (en) * | 2003-04-30 | 2006-02-01 | Oiles Corporation | Punch for thin-plate metal and punch device for thin-plate metal with the punch |
| JP2006088191A (en) * | 2004-09-24 | 2006-04-06 | Nippon Steel Corp | Automobile parts having blanked end face after forming which is excellent in fatigue property and method for manufacturing it |
| JP2006224151A (en) * | 2005-02-18 | 2006-08-31 | Nippon Steel Corp | Method for punching high-strength steel sheet |
| JP2006231425A (en) * | 2005-02-22 | 2006-09-07 | Nippon Steel Corp | Shearing blade for reducing cutting face crack, shearing method, and shearing machine |
| JP2007128805A (en) * | 2005-11-07 | 2007-05-24 | Toshiba Hokuto Electronics Corp | Magnetron for microwave oven |
| WO2008084536A1 (en) * | 2007-01-11 | 2008-07-17 | Hidaka Seiki Kabushiki Kaisha | Method of working platelike material and die assembly |
| EP2266722A1 (en) | 2004-09-15 | 2010-12-29 | Nippon Steel Corporation | High strength part and method of production of the same |
| CN102380541A (en) * | 2011-10-30 | 2012-03-21 | 山东华力电机集团股份有限公司 | I-shaped steel cutting die |
| KR101417119B1 (en) * | 2008-11-04 | 2014-07-08 | 현대자동차주식회사 | Piercing method for offering material work-hardened layer and punch thereof |
| CN104096752A (en) * | 2014-05-26 | 2014-10-15 | 太仓兴锋脚轮有限公司 | Punch forming equipment for trundle driving plate |
| CN104096755A (en) * | 2014-05-26 | 2014-10-15 | 太仓兴锋脚轮有限公司 | Punch forming equipment for trundle driving plate |
| CN104096751A (en) * | 2014-05-26 | 2014-10-15 | 太仓兴锋脚轮有限公司 | Castor driving plate punching molding equipment |
| JP2015080808A (en) * | 2013-10-24 | 2015-04-27 | 株式会社アマダ | Punching processing method of a planar workpiece and punch |
| KR101714564B1 (en) * | 2016-09-07 | 2017-03-15 | 장인환 | Punch of presses for chip removal |
| JP2020142288A (en) * | 2019-03-07 | 2020-09-10 | 愛知製鋼株式会社 | Punching punch, forging device including the same, and forging method using the same |
-
1991
- 1991-07-22 JP JP18123891A patent/JPH0523755A/en not_active Withdrawn
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1621268A1 (en) * | 2003-04-30 | 2006-02-01 | Oiles Corporation | Punch for thin-plate metal and punch device for thin-plate metal with the punch |
| EP1621268B1 (en) * | 2003-04-30 | 2009-12-16 | Ones Co., Ltd. | Punch for thin-plate metal and punch device for thin-plate metal with the punch |
| EP2266722A1 (en) | 2004-09-15 | 2010-12-29 | Nippon Steel Corporation | High strength part and method of production of the same |
| JP2006088191A (en) * | 2004-09-24 | 2006-04-06 | Nippon Steel Corp | Automobile parts having blanked end face after forming which is excellent in fatigue property and method for manufacturing it |
| JP2006224151A (en) * | 2005-02-18 | 2006-08-31 | Nippon Steel Corp | Method for punching high-strength steel sheet |
| JP4711396B2 (en) * | 2005-02-18 | 2011-06-29 | 新日本製鐵株式会社 | Punching method for high strength steel sheet |
| JP4638746B2 (en) * | 2005-02-22 | 2011-02-23 | 新日本製鐵株式会社 | Shear shear blade, shearing method, and shearing device for reducing cracks on cut surface |
| JP2006231425A (en) * | 2005-02-22 | 2006-09-07 | Nippon Steel Corp | Shearing blade for reducing cutting face crack, shearing method, and shearing machine |
| JP2007128805A (en) * | 2005-11-07 | 2007-05-24 | Toshiba Hokuto Electronics Corp | Magnetron for microwave oven |
| WO2008084536A1 (en) * | 2007-01-11 | 2008-07-17 | Hidaka Seiki Kabushiki Kaisha | Method of working platelike material and die assembly |
| KR101417119B1 (en) * | 2008-11-04 | 2014-07-08 | 현대자동차주식회사 | Piercing method for offering material work-hardened layer and punch thereof |
| CN102380541A (en) * | 2011-10-30 | 2012-03-21 | 山东华力电机集团股份有限公司 | I-shaped steel cutting die |
| JP2015080808A (en) * | 2013-10-24 | 2015-04-27 | 株式会社アマダ | Punching processing method of a planar workpiece and punch |
| CN104096752A (en) * | 2014-05-26 | 2014-10-15 | 太仓兴锋脚轮有限公司 | Punch forming equipment for trundle driving plate |
| CN104096755A (en) * | 2014-05-26 | 2014-10-15 | 太仓兴锋脚轮有限公司 | Punch forming equipment for trundle driving plate |
| CN104096751A (en) * | 2014-05-26 | 2014-10-15 | 太仓兴锋脚轮有限公司 | Castor driving plate punching molding equipment |
| KR101714564B1 (en) * | 2016-09-07 | 2017-03-15 | 장인환 | Punch of presses for chip removal |
| JP2020142288A (en) * | 2019-03-07 | 2020-09-10 | 愛知製鋼株式会社 | Punching punch, forging device including the same, and forging method using the same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0523755A (en) | Punching method for metallic plate and die | |
| EP1166925B1 (en) | Self-centering trim punch | |
| US20190291160A1 (en) | Method for machining a sheet-metal profile | |
| US4446351A (en) | Process for preparing a press die | |
| JP2003001337A (en) | Device for blanking | |
| JPH0581337B2 (en) | ||
| US4198884A (en) | Method of manufacturing a punching die | |
| EP1304179A1 (en) | Metal mold for press working | |
| JPH07214193A (en) | Precise sharing die in press machine | |
| JPH10211540A (en) | Manufacture of hexagonal headed bolt | |
| JPS63154216A (en) | Manufacture of long flange product | |
| JPH01293922A (en) | Die for blanking metallic sheet in state free from burrs and working method | |
| JPH07227627A (en) | Method of press blanking work | |
| JPH11254055A (en) | Method for shear-punching in two processes in same direction | |
| JP2956389B2 (en) | Deformed hole punching method and apparatus | |
| JP2567783B2 (en) | Engine manifold flange manufacturing method | |
| JPH0857557A (en) | Punching die of metal sheet and method therefor | |
| JP3911299B2 (en) | Sheet metal punching method | |
| KR100307100B1 (en) | A method for manufacturing a cylinder head washer | |
| JPH09225553A (en) | Press automatic producing method of plate like article | |
| JPH07108418B2 (en) | Sheet metal work manufacturing method | |
| JP2514594B2 (en) | Folding machine link type mold and its manufacturing method | |
| JP2898074B2 (en) | Manufacturing method of cylindrical parts | |
| KR102038082B1 (en) | Manufacturing method of shielding ring through progressive press die | |
| JP2707507B2 (en) | Precision shearing method and its equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19981008 |