JP2006159218A

JP2006159218A - Punch for working countersink

Info

Publication number: JP2006159218A
Application number: JP2004350758A
Authority: JP
Inventors: Hisakatsu Hirose; 寿勝廣瀬; Katsutoshi Sato; 勝敏佐藤
Original assignee: Kanto Jidosha Kogyo KK; Kanto Auto Works Ltd
Current assignee: Kanto Jidosha Kogyo KK; Toyota Motor East Japan Inc
Priority date: 2004-12-03
Filing date: 2004-12-03
Publication date: 2006-06-22

Abstract

<P>PROBLEM TO BE SOLVED: To provide a countersink working punch with which the quality is improved without generating burrs on a countersink of a work and punched slugs are not left in the female hole of a die in the case the countersink is pressed on the work. <P>SOLUTION: In the countersink working punch which has a conical part 2 corresponding to the countersink 7 of the die and a cutting edge 3a which is fit into the female hole 8 by which the cutting edge of the die 6 is formed at the tip and in the shaft center of which a jack pin 4 which is pressed and energized in the advancing direction with a spring is passed through in the axis direction, a sharp edge 3b is formed by forming the tip of the cutting edge 3a into a conical shape on the center side of a shaft. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、プレス加工機によりワークに皿穴抜きするための皿穴加工用パンチに関するものである。 The present invention relates to a countersink punch for punching countersunk holes in a workpiece by a press machine.

従来、プレス加工機によりワークに皿穴抜きするための皿穴加工用パンチにとして、図４で示すように、パンチ本体１の先端に図５で示すダイス６の皿穴７と対応する円錐部２とダイス６の切刃を形成する雌穴８に嵌合する切刃３０とを有し、軸芯にはスプリング５により前進方向に押圧付勢したジェックピン４を軸線方向に貫通した構造のものが知られている。 Conventionally, as a countersink punch for punching a workpiece with a press machine, as shown in FIG. 4, a conical portion corresponding to the countersink 7 of the die 6 shown in FIG. 2 and a cutting edge 30 that fits into a female hole 8 that forms a cutting edge of a die 6, and the shaft core has a structure in which a jack pin 4 that is pressed and biased in a forward direction by a spring 5 is penetrated in the axial direction. It has been known.

この皿穴加工用パンチによる皿穴加工のメカニズムは図６で示すように、パンチ本体１の押圧によりワークＷが円周方向に伸ばされ〔図６（Ａ）〕、ワークＷに切刃３０の先端が食い込み滑りながらさらに円周方向に伸ばされ〔図６（Ｂ）〕、加工の進行により上記切刃３０が食い込んだポイントが移動してしまい〔図６（Ｃ）〕、最終的に切刃３０とダイス６の雌穴８の切刃により切断され皿穴抜き加工する。前記切断されたスクラップＳはスプリング５により前進方向に押圧付勢されているジェックピン４により雌穴８より押し出されて排出する。このようにしてワークＷがダイス６の皿穴７に沿って円周方向に伸ばされることにより皿形状が形成される。 As shown in FIG. 6, the mechanism of the countersink processing by the countersunk hole punch is that the workpiece W is stretched in the circumferential direction by the pressing of the punch body 1 (FIG. 6A). The tip is further stretched in the circumferential direction while biting and sliding (FIG. 6 (B)), and the point at which the cutting blade 30 bites in moves as the machining progresses (FIG. 6 (C)). 30 and a countersink in a countersink are cut by the cutting blade of the female hole 8 of the die 6. The cut scrap S is pushed out of the female hole 8 by the Jeck pin 4 that is pressed and urged in the forward direction by the spring 5 and discharged. In this manner, the workpiece W is stretched in the circumferential direction along the countersink hole 7 of the die 6 to form a dish shape.

しかしながら、切刃３０の端部は軸線に対し直角面を呈しているため、図６（Ｃ）に示すように加工の進行により切刃３０の接触部が円周方向に移動することとなりワークＷに明けられた穴の周端縁に毟れが生じてこれがバリＧとなり品質を低下する。また、打ち抜きカスが発生してこれが雌穴の残存するという問題があった。
特開２００２−１７２４３５公報特開２００４−０７４１８２公報 However, since the end portion of the cutting edge 30 is perpendicular to the axis, the contact portion of the cutting edge 30 moves in the circumferential direction as the machining progresses as shown in FIG. 6C. As a result, the peripheral edge of the hole formed in the hole becomes wrinkled, and this becomes a burr G, which deteriorates the quality. In addition, there is a problem that a punched residue is generated and the female hole remains.
JP 2002-172435 A JP 2004-074182 A

本発明の目的は、ワークに皿穴をプレス加工する場合、ワークの皿穴にバリが生じることなく品質を向上し、また、ダイスの雌穴に打ち抜きカスが残存しないようにした皿穴加工用パンチを提供することである。 It is an object of the present invention to improve the quality without causing burrs in a countersunk hole of a workpiece when pressing a countersink in a workpiece, and for countersink processing to prevent punching residue from remaining in a female hole of a die. Is to provide a punch.

上記の目的を達成するための本発明は、請求項１に記載の通り、先端にダイスの皿穴と対応する円錐部とダイスの切刃を形成する雌穴に嵌合する切刃とを有し、軸芯にはスプリングにより前進方向に押圧付勢したジェックピンを軸線方向に貫通した皿穴加工用パンチにおいて、前記切刃の先端を軸中心側に円錐形状とし鋭利な刃先を形成したことを特徴とするものである。 In order to achieve the above object, the present invention has a conical portion corresponding to a countersink hole of a die and a cutting edge fitted to a female hole forming a cutting edge of the die as described in claim 1. In the countersink punch that penetrates in the axial direction the Jeck pin that is pressed and urged in the forward direction by a spring on the shaft core, the tip of the cutting blade has a conical shape on the axial center side, and a sharp cutting edge is formed. It is a feature.

本発明によると、切刃の先端を軸中心側に円錐形状とし鋭利な刃先を形成したことにより、ワークを鋭く切断処理し、明けられた皿穴の周端縁にバリの発生や打ち抜きカスの発生を防止し品質を向上した皿穴の加工を可能にした効果を有している。 According to the present invention, the tip of the cutting blade is conically shaped on the axial center side to form a sharp cutting edge, so that the workpiece is cut sharply, and the generation of burrs and punching debris on the peripheral edge of the opened countersink It has the effect of making it possible to process countersunk holes that prevent generation and improve quality.

以下本発明を実施するための最良の形態について図面に基づいて説明する。図１において、１はパンチ本体であり、図２で示すダイス６の皿穴７と対応する円錐部２とダイス６の切刃を形成する雌穴８に嵌合する切刃３ａとを有し、軸芯にはスプリング５により前進方向に押圧付勢したジェックピン４を軸線方向に貫通した構造である。 The best mode for carrying out the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 1 denotes a punch body, which has a conical portion 2 corresponding to the countersink 7 of the die 6 shown in FIG. 2 and a cutting edge 3 a that fits into a female hole 8 that forms the cutting edge of the die 6. The shaft core has a structure in which a jack pin 4 pressed and urged in the forward direction by a spring 5 is penetrated in the axial direction.

本発明は上記の構造よりなるパンチ本体１において、図２で詳細を示すように、前記切刃３ａ先端を軸中心側に円錐形状とし鋭利な刃先３ｂを形成したものである。 In the punch body 1 having the above structure, as shown in detail in FIG. 2, the tip of the cutting edge 3 a is conical on the axial center side to form a sharp cutting edge 3 b.

本発明は上記の通りの構造であるから、図３の皿穴加工のメカニズムで示すように、パンチ本体１の押圧により円錐形状の切刃３ａの刃先３ｂがワークＷに食い込むことでワークＷは円周方向に伸ばされることが抑制され皿形状外側からワークＷが伸ばされる〔図３６（Ａ）〕。 Since the present invention has the structure as described above, as shown in the countersinking mechanism in FIG. 3, the workpiece W is formed by the cutting edge 3 b of the conical cutting blade 3 a biting into the workpiece W by pressing the punch body 1. Stretching in the circumferential direction is suppressed, and the workpiece W is stretched from the outside of the dish shape (FIG. 36A).

上記での切刃３ａのワークＷへの接触部は移動することがなく図３（Ｂ）及び図３（ＣＢ）で示すように加工が進行し、図３（Ｄ）で示すように最終的に初期の切刃３ａのワークＷへの接触部が移動することなくパンチ本体１の切刃３ａの刃先３ｂとダイス６の雌穴８の切刃により切断され皿穴抜き加工する。 The contact portion of the cutting blade 3a with the workpiece W does not move, and the processing proceeds as shown in FIGS. 3B and 3CB, and finally, as shown in FIG. 3D. At this time, the contact portion of the initial cutting edge 3a with the workpiece W does not move and is cut by the cutting edge of the cutting edge 3b of the punch main body 1 and the female hole 8 of the die 6 for countersinking.

上記図３（Ｄ）で示すワークＷの切断では、切刃３ａの先端を軸中心側に円錐形状とし鋭利な刃先３ｂを形成しているため、ワークＷを鋭く切断処理し、明けられた皿穴の周端縁にバリの発生や打ち抜きカスの発生を防止する。尚、切断されたスクラップＳはスプリング５により前進方向に押圧付勢されているジェックピン４により雌穴８より押し出されて排出する。 In the cutting of the workpiece W shown in FIG. 3 (D) above, the tip of the cutting edge 3a is conical on the axial center side to form a sharp cutting edge 3b. Prevents the generation of burrs and punched debris at the peripheral edge of the hole. Note that the cut scrap S is pushed out of the female hole 8 by the Jeck pin 4 urged in the forward direction by the spring 5 and discharged.

また、切刃３ａの先端を軸中心側に円錐形状とし鋭利な刃先３ｂを形成しているため、刃先３ｂがワークＷに食い込みワークＷは円周方向に伸ばされることが抑制され切刃３ａのワークＷへの接触部が円周方向に移動することがなくなり、上記皿穴の周端縁にバリの発生や打ち抜きカスの発生の防止と相俟って品質を向上した皿穴の加工することができるのである。 In addition, since the tip of the cutting edge 3a is conical on the axial center side and the sharp cutting edge 3b is formed, the cutting edge 3b bites into the workpiece W and the workpiece W is restrained from being extended in the circumferential direction. Machining a countersink with improved quality in combination with the prevention of the occurrence of burrs and punching debris at the peripheral edge of the countersink so that the contact part with the workpiece W does not move in the circumferential direction. Can do it.

このように本発明は従来のパンチ本体の構造を大幅に改変することなく切刃３ａの形態を変更することにより、従来の問題点を解消することができ、低コストで実現することができる利点を有している。 As described above, the present invention can eliminate the conventional problems and can be realized at low cost by changing the form of the cutting blade 3a without significantly modifying the structure of the conventional punch body. have.

本発明による皿穴加工用パンチの側面図Side view of countersink punch according to the present invention 図１のＥ部をダイスと共に示す拡大図Enlarged view showing part E of FIG. 1 together with a die 本発明の皿穴加工のメカニズムを示す図The figure which shows the mechanism of countersink processing of this invention 従来の皿穴加工用パンチの側面図Side view of conventional countersink punch 図４のＦ部をダイスと共に示す拡大図Enlarged view showing part F of FIG. 4 together with a die. 従来の皿穴加工のメカニズムを示す図Diagram showing conventional countersink processing mechanism

符号の説明Explanation of symbols

１パンチ本体
２円錐部
３ａ切刃
３ｂ刃先
４ジェックピン
５スプリング
６ダイス
７皿穴
８雌穴 DESCRIPTION OF SYMBOLS 1 Punch main body 2 Conical part 3a Cutting blade 3b Cutting edge 4 Jeck pin 5 Spring 6 Dies 7 Countersink 8 Female hole

Claims

先端にダイスの皿穴と対応する円錐部とダイスの切刃を形成する雌穴に嵌合する切刃とを有し、軸芯にはスプリングにより前進方向に押圧付勢したジェックピンを軸線方向に貫通した皿穴加工用パンチにおいて、前記切刃の先端を軸中心側に円錐形状とし鋭利な刃先を形成したことを特徴とする皿穴加工用パンチ。 The tip has a conical portion corresponding to the countersink of the die and a cutting blade that fits into the female hole that forms the cutting blade of the die, and the shaft pin has a jack pin that is pressed and urged forward by a spring in the axial direction. A countersink punch for punching a countersunk hole, wherein the tip of the cutting edge is conically shaped toward the axial center to form a sharp cutting edge.