JPS5997727A - Press punching method by using cut and carry die - Google Patents

Abstract

PURPOSE:To improve remarkably a yield of material by notching a material into the width of product while preventing a slug from separating from the material in notching both side edges of the material by a prescribed bridge width. CONSTITUTION:Both side edges of a material 11 of width L1 are notched successively by a prescribed width B each along the feeding direction of the material 11 to conform the width of the material to the width L2 of a product 13. Here, the extent of a shear droop in the direction of sheet thickness (t) produced by the notching of a punch 18 is gradually decreased in the direction reverse to the material feeding direction 12, and the depth of shear droop at the rear end is kept to be about 0.25t so that a notched slug 15 is prevented from separating from the material 11. Next, a product 13 having a prescribed shape is punched from the material having the width L2 under the condition that the feeding bridge width A is null. Thus a press punching where the bridge width (about 0.7t) is made far smaller than a conventional threshold limit value is performed, and a material yield (about 73%) is improved remarkably.

Description

【発明の詳細な説明】 〔発明の技術分野〕 本発明は、電子管部品等の製作に用いられる順送り金型
によるプレス抜き方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a press punching method using a progressive mold used for manufacturing electron tube parts and the like.

〔発明の技術的背景とその問題点〕[Technical background of the invention and its problems]

一般に、電子管部品等の製作には順送り金型を用いたプ
レス抜き加工が広く用いられている。矛１図はこのよう
なプレス抜き加工忙おける従来の抜きのレイア□ウドを
示す。図において、　（１１１は幅寸法（Ｌ、）の材料
で、矢印（１２１で示す方向に送られる。In general, press punching using a progressive die is widely used for manufacturing electron tube parts and the like. Figure 1 shows the conventional punching layer used in such a press punching process. In the figure, (111 is a material with a width dimension (L,), which is fed in the direction indicated by an arrow (121).

ａ９は打抜き部分、すなわち、成品の形状を表わしてお
りその幅寸法は（Ｌ２）である。また寸法（２）は送り
さん幅を表わし、寸法（６）は緑さん幅を表わす。A9 represents the punched portion, that is, the shape of the finished product, and its width dimension is (L2). Further, dimension (2) represents the feed width, and dimension (6) represents the green width.

打抜きを行う場合は、牙１図で示した材料ａυを矢印ｔ
１■で示す方向に移動させて図示しない金型内部に送り
、一対のグイとポンチとで所定形状の成品αＪを打抜い
ている。When punching, move the material aυ shown in Fig. 1 by arrow t.
It is moved in the direction indicated by 1 (2) and fed into a mold (not shown), and a product αJ of a predetermined shape is punched out using a pair of gourds and a punch.

ここで、材料（１１）の板厚を（ｔ）とし、この板厚（
ｔ）が０．５■以上テ１．カッ成品（１３）ノｆｉ寸法
（Ｌ２）カ５０　ｍｙ未満の場合、送りさん幅（２）お
よび緑さん幅■は、ＪＩＳＢ５０１３により次式のよう
に決められている。Here, the plate thickness of material (11) is (t), and this plate thickness (
t) is 0.5■ or more Te1. When the fi dimension (L2) of the finished product (13) is less than 50 my, the feed width (2) and the green width (2) are determined by the following formula according to JISB5013.

ａ＝０．４＋０．６ｔ　　Ｂ＝１．２Ａただし、板厚（
ｔ）が１．５　ｉｕを越す場合は、各最小さん幅は板厚
（ｆｌと等しくする。なお、電子管部品の場合、ｌｔと
んとか板厚１．６朋以上のものである。a=0.4+0.6t B=1.2A However, plate thickness (
When t) exceeds 1.5 iu, each minimum width is equal to the plate thickness (fl).In the case of electron tube parts, the plate thickness is 1.6 iu or more.

このように各さん幅を決めてレイアウトを行い順次打抜
きを行うが、上述の如く最小さん幅が夫々決められてい
るので、材料利用率に限界があった。もちろん各さん幅
を小さくすれば材料利用率は向上するが、現状のプレス
抜き方法では、縁さん幅を上述した値より小さくすると
、成品の変形やパリが発生する。また抜きカス、Ｓヒゲ
状となり、これが金型に耐着したり或いは金属粉を出し
て打痕を成品に残したりするので、プレス加より−でき
なくなる。In this way, the width of each hole is determined, the layout is carried out, and the punching is performed sequentially, but as mentioned above, the minimum width of each hole is determined, so there is a limit to the material utilization rate. Of course, if the width of each edge is made smaller, the material utilization rate will be improved, but with the current press punching method, if the edge width is made smaller than the above-mentioned value, deformation or cracks will occur in the finished product. In addition, punching dregs and S-stripes form, which adhere to the mold or emit metal powder and leave dents on the product, making it impossible to press.

〔発明の目的〕[Purpose of the invention]

本発明の目的は、緑さん幅を従来よりさらに小さくする
ことを可能として材料利用率を向上させた順送り金型に
よるプレス抜き方法を提供することにある。An object of the present invention is to provide a press-cutting method using a progressive die, which allows the width of the green hole to be made smaller than before and improves the material utilization rate.

〔発明の概要〕[Summary of the invention]

本発明は、一定幅の材料をその長さ方向に順送りし、所
定形状の成品を順次打抜き加工する順送り金型によるプ
レス抜き方法であって、前記材料の軸方自画ＩＩＩ　ｆ
ｉを前記成品の幅寸法となるように所定の緑さん幅を材
料送り方向に沿って順次切欠く第１の工程と、この矛ｌ
の工程にて切欠かれた材料から所定形状の成品を打抜く
矛２の工程とからなり、前配牙ｌの工程では、その切欠
部の、材料送り方向に対する後端部の抜きカスが材料の
板厚方向に対し所定の食い込み深さを保った状態で材料
から分断されないように切欠くこと忙より、縁さん幅を
従来の７０．％程度Ｋまで減少させたことを特徴とする
、ものである。The present invention is a press punching method using a progressive die, in which a material of a constant width is progressively fed in its length direction, and products of a predetermined shape are sequentially punched out.
A first step of sequentially notching a predetermined green width along the material feeding direction so that i becomes the width dimension of the finished product;
It consists of a step 2 in which a product of a predetermined shape is punched out from the material notched in the step 2, and in the step 2, the punched scum at the rear end of the notch in the material feeding direction is removed from the material. In order to cut out the material while maintaining a predetermined depth in the thickness direction so as not to separate it from the material, the width of the edge was reduced to 70. % K.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明を図面に示す一実施例を参照して説明する
。Hereinafter, the present invention will be described with reference to an embodiment shown in the drawings.

牙２図は本発明方法による抜きのレイアウト例を示して
いる。なお図中に附した符号は牙１図で示したものとそ
れぞれ対応する。本発明は、先ず、材□料（１１１の扇
方向両側縁な所定の縁さん＠■分材料送り方向に沿って
順次切欠きし、材料の幅を成品０３の幅寸法（Ｌ２）に
する。その後、所定形状の成品（１３１を得るべく打抜
き加工を行う。なお、図６中α９は切欠部に生じる抜き
カスであり、また（１８は・成品ａ渇の打抜きにより生
じる抜きカスである。Figure 2 shows an example of the layout of punching according to the method of the present invention. Note that the symbols given in the figures correspond to those shown in Fig. 1, respectively. In the present invention, first, the width of the material is set to the width dimension (L2) of the product 03 by sequentially cutting along the material feeding direction by a predetermined edge width @■ on both sides of the material (111) in the fan direction. Thereafter, a punching process is performed to obtain a product (131) of a predetermined shape. In FIG. 6, α9 is the punching waste produced at the notch, and (18 is the punching waste produced by punching the finished product).

ここで、本発明では、材料（ｉｌｌの前記両側縁を切欠
くに当、す、十３図で示す切欠きポンチａυを用いてい
る。この切欠きポンチａ槌は、材料送り方向（図示右方
）に対する後方（図示左方）に向うに従い、材料ａυの
板厚方向への食い込み量が少となるように設定したもの
である。そして、このような切欠きポンチ餞を用いて、
切欠部の前記材料送り方向忙対する後端部が、材料ａυ
の板厚（ｔ）　Ｋ対し、所定の食い込み深さく例えば板
厚の２５チ）を保った状態で抜きカスＱ９が材料ａυか
ら分断されないように切欠き加工を行う。Here, in the present invention, a notch punch aυ shown in FIG. It is set so that the amount of biting of the material aυ in the thickness direction decreases as it goes backward (to the left in the figure) with respect to
The rear end of the notch facing the material feeding direction is
With respect to the plate thickness (t) K, the notch processing is performed while maintaining a predetermined biting depth (for example, 25 inches of the plate thickness) so that the punched waste Q9 is not separated from the material aυ.

このようにして両側部の切欠きを行うと、抜きカス（１
５１が図示しない金型に付着したりすることはなく、金
属粉やパリもカスと一緒に金型外に払い出せるようにな
った。このため、斥さん幅（６）を従来の限界値である
板厚（ｔ）と等しい値よりさらに小さく例えば板厚（ｔ
ｌの７０−程度まで小さくしてプレス抜きを行うことが
可能となった。その結果、材料の利用率は矛２図のよう
に送りさん幅（ト）を零として打抜ぎを行えば、従来の
材料利用率例えば５８％が７３％と大幅に向上する。When the notches on both sides are made in this way, the cut scraps (1
51 does not adhere to the mold (not shown), and metal powder and Paris can now be discharged out of the mold together with the dregs. Therefore, the cutting width (6) is made smaller than the conventional limit value, which is equal to the plate thickness (t), for example, the plate thickness (t).
It became possible to perform press punching by reducing the size to about 70-1. As a result, the material utilization rate can be greatly improved from the conventional material utilization rate of 58% to 73%, for example, if punching is performed with the feed width (g) set to zero as shown in Figure 2.

〔発明の効果〕〔Effect of the invention〕

以上のように本発明によれば、各さん幅を従来の限界値
を越えた値に設定できるので、材料の利用率を大１′厘
に向上させ、スクラップレス化の促進にも貢献するもの
である。As described above, according to the present invention, each width can be set to a value that exceeds the conventional limit value, so the utilization rate of materials can be improved by 100%, and it also contributes to the promotion of scrapless. It is.

【図面の簡単な説明】 牙１図は従来方法における抜きのレイアウトを示す平面
図、矛２図は本発明の１＠送り金型によるプレス抜き方
法の一実施例における抜きのレイアウトを示す平面図、
牙３図は本発明における切欠部の切欠状態を示す断面図
である。 （Ｉｌｌ・・材料、（１り・・材料送り方向、ａ３・・
成品、０９＠拳切欠部の抜きカス、（Ｌ、）・・材料の
幅寸法、（Ｌ２）・・成品の幅寸法、（ロ）・・緑さん
幅。[BRIEF DESCRIPTION OF THE DRAWINGS] Figure 1 is a plan view showing the layout of punching in the conventional method, Figure 2 is a plan view showing the layout of punching in an embodiment of the press punching method using a feed die of the present invention. ,
Figure 3 is a sectional view showing the cutout state of the notch in the present invention. (Ill...Material, (1ri...Material feeding direction, a3...
Finished product, 09 @ punched scraps from fist notch, (L,)... Width dimension of material, (L2)... Width dimension of finished product, (B)... Midori-san's width.

Claims (1)

【特許請求の範囲】[Claims] （１）　　一定幅の材料をその長さ方向に順送りし、所
定形状の成品を順次打抜き加工する方法において、前記
材料の幅方向両＠緑を前記成品の幅寸法となるように所
定の緑さん幅を材料送り方向に活って順次切欠く牙１の
工程と、この牙１の工程にて切欠かれた材料から所定形
状の成品を打抜く第２の工程とからなり、前記第１の工
程では、その切欠部の材料送り方向に対する後端部の抜
きカスが材料の板厚方向に対し所定の食い込み深さを保
った状態で材料から分断されないよう忙切欠くことを特
徴とする順送り金型によるプレス抜き方法。(1) In a method in which a material of a constant width is fed progressively in the length direction and a product of a predetermined shape is punched out one after another, a predetermined green plate is used so that both sides of the material in the width direction @green correspond to the width dimension of the product. The process consists of a process of making the fangs 1 in which the width is successively cut out in the material feeding direction, and a second process of punching out a product of a predetermined shape from the material notched in the process of making the fangs 1, which is the first process. Here, we provide a progressive feed die characterized by having a busy notch so that the punched waste at the rear end of the notch in the material feeding direction is not separated from the material while maintaining a predetermined biting depth in the material thickness direction. How to press out.