JPH03429A - Method for punching slender hole - Google Patents

Abstract

PURPOSE:To prevent the bulging of a hole and the warping of a plate by suppressing a work with wedge action from side faces and with an auxiliary arm from front and back thereof. CONSTITUTION:The work 9 is placed on a die 4 on a press table A, and a punch 6 is fitted to the arm B of the press and the auxiliary arm 10 is fitted to the outer side of the press arm B so as to be vertically slidable, and the wedges 5 are held at the lower face through springs 11. The wedges 5 are positioned at the time of working the punch 6 so that the one sides 5b can be brought into contact with the side faces of the work 9 and the inclined parts 5a of the other sides can be brought into contact with the inclined parts 10a of the auxiliary arm 10 for the wedge action. By this method, the work 9 is suppressed with the wedge action from the front and back and with the auxiliary arm 10 from the front and back, and the bulging of the hole and the warping of the plate can be prevented.

Description

【発明の詳細な説明】 １）技術分野二本発明は細長板材にその長さへ向をこの
板材と同じくづる細長孔をプレスにより打扱く場合の方
法に関する。DETAILED DESCRIPTION OF THE INVENTION 1) Technical Field 2 The present invention relates to a method for forming elongated holes in an elongated plate having the same direction along its length by pressing.

２〉従来技術、その問題点：例えば第１図に側面図で示
すような自動車のシートベルト巻込み装置のリールシャ
フトにベルトの通る細長孔２をプレスによりあけるとき
、従来はその材料たる細長板材（ワーク）をグイ上に置
いてこれを抑え仮、で抑えてバンチするというものＣあ
った。このような方法では、孔が、また当然材料が長さ
の中程でふくらみ、製品も厚さ方向で反るというような
欠点があった。2> Prior art and its problems: For example, when pressing the elongated hole 2 through which the belt passes in the reel shaft of an automobile seat belt retracting device as shown in the side view in Fig. 1, conventionally the elongated plate material is There was a method of placing the (work) on a gui, holding it down with a tactile, and then bunching it. This method has disadvantages in that the holes and, of course, the material bulges in the middle of the length, and the product also warps in the thickness direction.

３）間ｍ解決の手段：それで本発明ではワークの両側に
くさびを当て、このくさびは板材との接触側のに対印を
くさび作用のためのテーパーとし。3) Means for solving the gap m: Therefore, in the present invention, wedges are applied to both sides of the workpiece, and the opposite mark on the side in contact with the plate material is tapered for the wedge action.

打広き時はこのくさびのテーパー部と機材の衷失両面と
を圧するようにしたものである。When hitting wide, the tapered part of this wedge presses against both sides of the equipment.

４）実施例：第１図は本発明による加工した製品の１例
、自動車のシートベルトの巻込み装置のり一ルシャフ１
−の平面図で、１は厚板材よりなるシャフト、２はシト
フト１の長ざ方向に穿たれたベルトの通る細長孔、３は
このシャフト端のラヂ■ット歯巾である。第２図はワー
ク９がプレス台Ａ上のダイス４にのせられ、プレスの腕
Ｂにはバンチ６が取付けられている状態を側面図で示し
ている。１０はプレス鋺Ｂ上に上ＦｔＰ：Ｉ苫動可能に
外嵌された補助腕で、下面にくさび５をばね１１を介し
て保持している。くさび５はバンチ６の作用時はその１
側５ｂをワーク９の側面に、伯側はくさび作用のための
テーパー部５ａを補助腕１０のテバ一部１０ａにそれぞ
れ接しつるように位置ぎめされている。第３図は補助腕
１０が完全に下がり切ってこれが板材９とくさＣ５とを
抑えた状態を、即ら前段工程を、第４図はプレス腕Ｂｔ
ｆｉ史に下降して板材９を打俵いた状態をすなわち終段
■稈を示している（１２は押しかケ）。4) Example: Figure 1 is an example of a processed product according to the present invention, a glue shaff 1 for an automobile seat belt retracting device.
- In the plan view, 1 is a shaft made of thick plate material, 2 is an elongated hole drilled in the longitudinal direction of the shaft 1 through which the belt passes, and 3 is the tooth width of the rad at the end of this shaft. FIG. 2 shows a side view of a state in which a workpiece 9 is placed on a die 4 on a press stand A, and a bunch 6 is attached to an arm B of the press. Reference numeral 10 denotes an auxiliary arm fitted onto the press bar B so as to be able to move upward FtP:I, and holds the wedge 5 on its lower surface via a spring 11. Wedge 5 is part 1 when bunch 6 acts
The side 5b is positioned so as to be in contact with the side surface of the workpiece 9, and the tapered part 5a for wedge action is in contact with the edge portion 10a of the auxiliary arm 10, respectively. Figure 3 shows the state in which the auxiliary arm 10 is completely lowered and holds down the plate material 9 and the crosspiece C5, that is, the first step, and Figure 4 shows the press arm Bt.
The state in which the plate 9 is rolled after descending to the fi history is shown as the final stage (12 is a push).

５）効果：このように本発明ではワークをその側面から
くさび作用によつＣ１また補助腕により衷失より抑える
ことにより孔の・Ｓ・りらみゃ仮の反りを防止しうる。5) Effects: As described above, in the present invention, temporary warping of the hole can be prevented by suppressing the workpiece from buckling by the wedge action from the side surface of the workpiece by C1 or the auxiliary arm.

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

第１図は本発明の加工例を／Ｒすワ−りの１例。 第２図、第３図、第４図は木り法にお；ノる加工工程を
示す。 １、　　加ニス４象のシャツ（一部 ２、　　　　　　　細長化 ４、　　　ダイ ５、　　　くさび ６、　　　バンチ ばね １）　−　り 補助Ｉ浣 ルス台 ｆレス腕 ’１１ｒｉ４ 第３図 第２図 第４ｒＡFig. 1 shows an example of the processing of the present invention. Figures 2, 3, and 4 show the processing steps involved in the wood cutting method. 1. Kanisu 4-elephant shirt (part 2, elongation 4, die 5, wedge 6, bunch spring 1) - auxiliary I kasu base fless arm '11ri 4 Fig. 3 Fig. 2 Fig. 4rA

Claims (1)

【特許請求の範囲】[Claims] 細長板材にその長さ方向を同じくする細長孔を打抜くと
き、該板材の両側にくさびを当て、このくさびは板材と
の接触側の反対側をくさび作用のためのテーパー部とし
、打抜き時は板材の面と上記テーパー部とを圧するよう
にした細長孔の打抜き方法。When punching slotted holes with the same length direction in a long plate material, wedges are applied to both sides of the plate material, and the wedge has a tapered part for wedge action on the opposite side of the contact side with the plate material. A method for punching out an elongated hole in which the surface of the plate material and the tapered part are pressed.