JPS5966934A - Work punching method - Google Patents

Abstract

PURPOSE:To prepare easily and effectively a work having no burr by specifying a clearance between a punch and a die, and the R of the die, half-punching the work to specified thickness by the first punching, and thereafter, returning the work to a material to be worked. CONSTITUTION:When punching a work 3b from a metallic material 4, a clearance between a punch 2 and a die 1b is set to 0-5%, and also the R9 of the die 1b is set to 10-20% (t) of the work 3b. The punch 2 selects optionally thrusting-in depth within a range of 65-80% (t) depending on the quality of a material to be worked 4, is stopped on the way of punching, the work 3b is set to a half-punched state, and the punch 2 is returned to the top dead center. Subsequently, the half-punched work 3b is returned to the material to be worked 4, punching is executed, a reverse punching phenomenon is generated in the part connected to the work 3b, and it is pushed back completely. As a result, the work 3b is detached from the material to be worked 4, and an independent work 3b having no burr is obtained.

Description

【発明の詳細な説明】 本発明は、ワークのパリなし打抜法に関する。[Detailed description of the invention] The present invention relates to a method for punching a workpiece without flashing.

従来、金属仮相から打抜を行って、ワーク３αを求める
場合、第１図＠）と（ｂ）に示すように抜は側にパリ８
と破断面７が発生、パリは実用上後処理を必要とし、不
経済であり、破断面も側面使用上不利で、２次加工を必
要とする場合が多い。Conventionally, when punching is performed from a temporary metal phase to obtain a workpiece 3α, there is a paris 8 on the punching side as shown in Figure 1 @) and (b).
A fractured surface 7 is generated, which is uneconomical as it requires post-processing in practice, and the fractured surface is also disadvantageous in side use and often requires secondary processing.

この発明は、上記の欠点を除去するため金型切刃構造只
の管理と、抜戻し加工により、パリなしワークを求める
ことを目的としたものである。The purpose of the present invention is to eliminate the above-mentioned drawbacks by controlling the structure of the cutting edge of the mold and by extracting and returning the mold to obtain a workpiece without burrs.

以下本発明を図面にもとづいて詳細に説明する。The present invention will be explained in detail below based on the drawings.

第２図において、ダイ１ｂは、あらかじめ１０チ〜２０
ｔ４ｔのＲをほどこし、パンチ２の被加工材４を６５チ
〜５ｏｓｔ半抜きに際し、ワーク３ｂに破断の起きない
条件を有するものである。In FIG. 2, the die 1b has 10 to 20 die in advance.
The condition is such that the workpiece 3b does not break when the punch 2 punches the workpiece 4 by 65 inches to 50cm and a half by applying an radius of t4t.

パンチ２は、被加工材の材質によフロ５〜８０％ｔの範
囲で突込み深さを任意に選び、打抜途中で停止、ワーク
３ｂを半抜き状態にして、パンチ２は上死点に戻る。The punch 2 arbitrarily selects the plunge depth in the range of 5 to 80% of the flow depending on the material of the workpiece, stops in the middle of punching, leaves the workpiece 3b in a half punched state, and punch 2 reaches the top dead center. return.

次に半抜きさしたワーク３”’ｅ、ダイ上面の次のステ
ージにて、被加工材４へ戻し打込を行い、ワーク３ｂと
接続さｔ″ＬｆｃＬｆｃ部分現象を発生せしめ、第３図
のように被加工材４へ戻し運動を行　゛い、完全にブツ
シュバックする。Next, the half-blanked workpiece 3'''e is returned to the workpiece 4 at the next stage on the upper surface of the die, and is connected to the workpiece 3b to generate the partial phenomenon t''LfcLfc, as shown in Fig. 3. The workpiece is returned to the workpiece 4 in this manner, and the workpiece is completely pushed back.

ワーク３ｂ逆方同せん断面の１部に破断が発生するが、
被加工材４から切り離さ扛て独立したワーク３ｂとなり
、パリなし品が構成さ【、こｆＬｔ打込−４ｎた被加工
側から取フ出すことにより、パリなしワーク３ｂ完成と
なるものである６　（第４図参照〕。A break occurs in a part of the reverse shear surface of workpiece 3b, but
It is separated from the workpiece 4 and becomes an independent workpiece 3b, and a burr-free product is constructed.By removing the blade from the workpiece side, the burr-free workpiece 3b is completed. (See Figure 4).

以上のごとく、本発明によｎば、金型切刃部Ｒのｇ理、
クリアランス管理、半抜き深さ管理と抜き戻し加工全行
うので、パリなしワークが簡単に作られる効果を有する
。As described above, according to the present invention, the processing of the mold cutting edge R,
Clearance control, half-blanking depth control, and back-blanking processing are all performed, so it has the effect of easily producing workpieces without burrs.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図（α）は従来の打抜側面図、 第１図（ｂ）は従来のワークの打抜完了側面図、第２図
は本発明におけるＲ信金型による半抜状態側面図、 第３図は本発明における打込み側面図、第４図は被加工
側から取り出した本発明におけるワーク側面図である。 １α、１ｂ、、ダイ ２０．パンチ ３ａ、３Ｆｌ、、ワーク ４　・　＠　被刀ロエ材 ５ａ、５ｂ、。ワークダレ ６α、６ｂ、。ワークせん断面 ７、。ワーク破断面 ８０．ワークパリ ９、−、ダイＲ 以上 出願人　株式会社第二精玉舎 代理人　弁理士最上　　務FIG. 1(α) is a side view of a conventional punching process, FIG. 1(b) is a side view of a conventional workpiece after punching is complete, FIG. FIG. 4 is a side view of the driving work according to the present invention, and FIG. 4 is a side view of the workpiece according to the present invention taken out from the side to be processed. 1α, 1b,, die 20. Punch 3a, 3Fl,, Work 4 ・ @ Roe material to be cut 5a, 5b,. Work sauce 6α, 6b,. Workpiece shear plane 7. Workpiece fracture surface 80. Work Paris 9, -, Dai R Applicant Daini Seidokusha Co., Ltd. Agent Patent Attorney Mogami

Claims (1)

【特許請求の範囲】[Claims] 金属板材から、ワークを求める打抜方法で、パンチとダ
イのクリアランスはθ〜５チとすると共に、ダイはワー
クの厚みの１０　％〜２０％ｔのアールを付け１、第１
打抜の際、パンチの深さはワークの厚みの６５〜８０チ
の半抜状態にとどめた後、ワークを再び波加工機に戻す
加工を入ｎて、ワーク上下面にダレとせん断面を求める
ことを特徴とするワーク打抜法。This is a punching method for obtaining a workpiece from a metal plate material, and the clearance between the punch and die is θ ~ 5 inches, and the die has a radius of 10% to 20% of the thickness of the workpiece.
During punching, the depth of the punch is kept at 65 to 80 inches, which is the thickness of the workpiece, and then the workpiece is returned to the corrugation machine to create sagging and sheared surfaces on the upper and lower surfaces of the workpiece. A workpiece punching method characterized by the following.