EP0734799B1 - Unité de poinçonnage pour opérations de poinçonnage - Google Patents

Unité de poinçonnage pour opérations de poinçonnage Download PDF

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Publication number
EP0734799B1
EP0734799B1 EP19960400662 EP96400662A EP0734799B1 EP 0734799 B1 EP0734799 B1 EP 0734799B1 EP 19960400662 EP19960400662 EP 19960400662 EP 96400662 A EP96400662 A EP 96400662A EP 0734799 B1 EP0734799 B1 EP 0734799B1
Authority
EP
European Patent Office
Prior art keywords
die
die body
surface portion
auxiliary
unit
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.)
Expired - Lifetime
Application number
EP19960400662
Other languages
German (de)
English (en)
Other versions
EP0734799A3 (fr
EP0734799A2 (fr
Inventor
Masami Iwamoto
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Amada Co Ltd
Original Assignee
Amada Metrecs Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Amada Metrecs Co Ltd filed Critical Amada Metrecs Co Ltd
Publication of EP0734799A2 publication Critical patent/EP0734799A2/fr
Publication of EP0734799A3 publication Critical patent/EP0734799A3/fr
Application granted granted Critical
Publication of EP0734799B1 publication Critical patent/EP0734799B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/24—Perforating, i.e. punching holes
    • B21D28/34—Perforating tools; Die holders
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/16—Shoulder or burr prevention, e.g. fine-blanking

Definitions

  • the present invention relates to a die unit for performing punching operations on a workpiece in cooperation with a punch unit, and a method of extending the working life thereof.
  • a conventional die unit 101 has a die body 103 formed with a die hole 105 passing vertically through a substantially center portion thereof.
  • the punch unit 107 When a punching is performed on a metal workpiece W with the die unit 101 and a punch unit 107, the punch unit 107 is descended after the workpiece W is placed on an upper surface of the die body 103. Thus, the workpiece W is held between a punch guide 109 and the die body 103 and supported thereby.
  • a punch body 111 is further descended and a punching is performed on the workpiece W in cooperation with the die body 103, a refuse WA removed from the workpiece W is dropped off downwardly through the die hole 105.
  • a burr B1 is formed under the workpiece W as shown in Fig. 2A. If this burr B1 is left as it is, the burr B1 may constitute a hindrance to the following processing. Therefore, a burr removing process for removing the burr B1 is performed, for example, by grinding tools. However, when the burr removing process is performed to remove the bur B1, a secondary burr B2 extending in the horizontal direction as shown in Fig. 2B may be formed in the workpiece W. Accordingly, there was a problem that the burr formed during punching operations could not completely be removed and constituted a hindrance to the following processing as it used to be. Further prior art is disclosed in JP-A-63101029, which illustrates the combination of features specified in the preamble of claim 1.
  • an object of the present invention to provide a die unit for performing punching operations on a workpiece in cooperation with a punch unit without producing a burr on the lower surface of the workpiece, and thereby the burr removing operations are no longer necessary.
  • Fig. 1 is an explanatory view illustrating a punching operation by conventional punch unit and die unit.
  • Fig. 2 A is cross-sectional view illustrating a workpiece formed with a burr resulting from a punching operation by the conventional punch and die units
  • Fig. 2B is a cross-sectional view illustrating a workpiece resulting from a burr removing operation on the workpiece of Fig. 2A.
  • Fig. 3 is a cross-sectional view illustrating a further die unit.
  • Fig. 4 is an explanatory view illustrating a punching operation with the die unit according to Fig 3.
  • Fig. 5 is a cross-sectional view illustrating a workpiece processed by the punch unit and die unit according to Fig. 3.
  • Fig. 6 is a cross-sectional view of an embodiment of the die unit according to the present invention.
  • Fig. 7 is an explanatory view illustrating a punching operation on a workpiece by the punch unit and die unit according to the embodiment.
  • a die unit is composed of a die body 3.
  • a die hole 5 passing vertically is formed in a substantially center portion of this die body 3.
  • a projecting portion 11 slightly protruding upward relative to an upper surface 7 of the die body 3 is formed.
  • the projecting portion 11 has a horizontal surface 9.
  • Fig. 4 illustrates a punching operation performed on a workpiece W with the die unit 1.
  • a punch guide 15 of a punch unit 13 is descended.
  • the workpiece W is held between the punch guide 15 and the die body 3 and supported thereby.
  • a punch body 17 is further descended and the workpiece W is punched by the engagement of the punch body 17 with the die body 3
  • a refuse WA is cut out from the workpiece W and a hole Wa is formed in the workpiece W.
  • a chamfering portion (or a recessed portion) M recessed upwardly is formed along the perimeter of the hole Wa with the projecting portion 9,. Accordingly, a burr B formed in the chamfering portion M does not project outwardly of a lower surface of the workpiece W. Since such burr B does not constitute a hindrance to the following processing, it is unnecessary to be removed.
  • the chamfering portion M is formed in the workpiece so that the burr B is prevented from projecting below the lower surface of the workpiece W. Therefore burr removing operations are no longer necessary. Further, since the chamfering portion is formed during the punching operation, the operation is quick and simple.
  • the height H of the protruding portion 11 is equal to 0.2 to 0.5mm, and the width A of the horizontal surface 9 is equal to 0.1 to 0.2mm.
  • the chamfering operation can be favorably performed in a workpiece. That is, the burr B is located well inside the chamfering portion M; in other words, the burr B is surely prevented from protruding downward from the lower surface of the workpiece W.
  • the outside surface of the protruding portion 11 is inclined relative to the vertical axis of the die body 3, but it may be parallel to the vertical axis. Further, a cross-sectional shape of the die hole 5 in a horizontal direction may be circular, rectangular or the like.
  • FIG. 6 illustrates an embodiment 201 of the die unit according to the present invention.
  • a die unit 201 of the second embodiment includes a die body 203 and an auxiliary cap 221.
  • the die body 203 is formed with a die hole 205 passing vertically through a substantially center portion thereof.
  • a conical surface portion 219 spreading outwards downwardly is further formed on the outer peripheral surface thereof, and a ridge portion 209 is formed at the upper portion 211 of the die body 203.
  • the ridge portion 209 is preferably formed with a horizontal plane surface.
  • the auxiliary cap 221 is detachably provided on the die body 203.
  • a hole 231 having conical shaped portion corresponding to the conical surface portion 219 is formed in the auxiliary cap 221 and the auxiliary cap 221 is provided on the die body 203 so that the conical shaped portion of the hole 231 engages with the conical surface portion 219.
  • the ridge portion 209 is designed to slightly protrude upward above an upper surface 223 of the auxiliary cap 221.
  • the auxiliary cap 221 may be fixed to the die body 203 by suitable means.
  • Fig. 7 illustrates the manner in which a workpiece W is processed by the punch unit 13 and the die unit 201 according to the second embodiment.
  • the die unit 201 of the embodiment has the same function as the die unit 101 of Figures 3 to 5. That is to say, as illustrated in Fig. 5, the chamfering portion (or the recess portion) M is formed along the perimeter of the hole Wa on a lower surface of the workpiece by the punching operation. Therefore the burr B formed along the perimeter of the punch hole Wa is located inside the chamfering portion (or the recessed portion) so as not to project downwardly below the lower surface of the workpiece W. Accordingly, burr removing operations after punching operations are no longer necessary.
  • the auxiliary cap 221 when the ridge portion 209 of the die body 203 is worn away by punching operations, the auxiliary cap 221 is detached from the die body 203, and the inclined portion 219 is ground so that a new surface is parallel to the original surface.
  • the new ridge portion 209 projects upwardly by a suitable amount above the upper surface 223 of the auxiliary cap 221. Grinding of the inclined portion 219 can be performed several times until the height of the vertical portion 203a of the body 203 becomes zero. Accordingly, the grinding operations can be repeatedly performed, whereby the life of the die is extended.
  • the height of the vertical portion 203a of the body 203 eventually becomes shorter than that of a vertical portion 231b of the hole 231 in the auxiliary cap 221.
  • an auxiliary member may be interposed between the die body 203 and a die holder of a punching press.
  • the projecting height H of the ridge portion 209 relative to the upper surface 223 is equal to 0.2 to 0.5mm and the width A of the horizontal plane surface of the ridge portion 209 is equal to 0.1 to 0.2mm.
  • the horizontal cross-sectional shape of the die hole 205 may be circular, rectangular or the like.
  • the auxiliary cap 221 is made of a metal and preferably of the same metal as the die body 203.
  • the ridge portion projecting upwardly above the upper surface of the die body or auxiliary cap is provided in the upper peripheral portion of the die hole. Therefore, when a punching is performed on a workpiece, the chamfering portion is formed along the perimeter of the punched hole. Accordingly, the burr B produced around the punched hole Wa is located inside the chamfering portion so as not to project downwardly below the lower surface of the workpiece W. Accordingly, burr removing operations after punching operations are no longer necessary.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Punching Or Piercing (AREA)

Claims (5)

  1. Unité de matrice destinée à réaliser des opérations de poinçonnage en coopération avec une unité de poinçon (13) qui comprend un corps de poinçon (17) comportant :
    un corps de matrice (203) formé au niveau de sa partie sensiblement centrale avec un trou de matrice (205) s'étendant dans une direction axiale afin de recevoir un bord de coupe du corps de poinçon (17), sur sa surface périphérique extérieure avec une partie de surface inclinée (219) qui s'étale vers l'extérieur et vers le bas, et au niveau de sa partie supérieure avec une partie d'arête (209), et
    un élement auxiliaire (221) fixé de façon démontable sur le corps de matrice (203), l'élément auxiliaire (221) étant formé avec une partie de trou (231) qui engage ladite partie inclinée (219) du corps de matrice (203), et avec une partie de surface supérieure (223) qui s'étend dans un plan perpendiculaire à la direction axiale de façon à supporter une pièce pendant les opérations de poinçonnage, l'élément auxiliaire (221) étant conçu de telle sorte que la partie d'arête (209) dépasse vers le haut au-dessus de la partie de surface supérieure (223) de l'élément auxiliaire (221) lorsque l'élément auxiliaire (221) est monté sur le corps de matrice (203),
       caractérisée en ce que l'élément auxiliaire (221) est sous la forme d'un chapeau, en ce que le corps de matrice (203) est un élément d'une seule pièce, et en ce que la partie de surface inclinée (219) délimite la forme extérieure de la partie d'arête (209) de telle sorte que la partie supérieure est constituée uniquement par la partie d'arête (209) qui dépasse uniquement vers le haut au-dessus de la partie de surface supérieure (223) de l'élément auxiliaire (221) lorsque l'élément auxiliaire est monté sur le corps de matrice.
  2. Unité de matrice selon la revendication 1, dans laquelle la partie d'arête (209) est formée avec une section en forme de coin.
  3. Unité de matrice selon la revendication 1, dans laquelle la partie d'arête (209) est formée avec une surface plane horizontale qui s'étend sensiblement parallèlement à la partie de surface supérieure (223) de l'élément de chapeau auxiliaire (221).
  4. Unité de matrice selon la revendication 3, dans laquelle la hauteur de la partie d'arête (209) au-dessus de la partie de surface supérieure (223) de l'élément de chapeau auxiliaire (221) est entre 0,2 et 0,5 mm, et la largeur de la surface plane horizontale de la partie d'arête (209) est entre 0,1 et 0,2 mm.
  5. Procédé destiné à prolonger la durée de vie d'une unité de matrice selon la revendication 1, ledit procédé comportant le fait de :
    (a) démonter l'élément de chapeau auxiliaire (221) du corps de matrice (203) lorsque la partie d'arête (209) de l'unité de matrice est usée par des opérations de poinçonnage;
    (b) meuler la partie de surface inclinée (219) du corps de matrice (203) afin de former une nouvelle partie de surface inclinée qui est parallèle à l'ancienne partie de surface inclinée; et
    (c) fixer l'élément de chapeau auxiliaire (221) sur le corps de matrice meulé (203).
EP19960400662 1995-03-28 1996-03-28 Unité de poinçonnage pour opérations de poinçonnage Expired - Lifetime EP0734799B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP69470/95 1995-03-28
JP6947095A JPH08267158A (ja) 1995-03-28 1995-03-28 ダイ金型
JP6947095 1995-03-28

Publications (3)

Publication Number Publication Date
EP0734799A2 EP0734799A2 (fr) 1996-10-02
EP0734799A3 EP0734799A3 (fr) 1997-04-16
EP0734799B1 true EP0734799B1 (fr) 2001-06-13

Family

ID=13403598

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19960400662 Expired - Lifetime EP0734799B1 (fr) 1995-03-28 1996-03-28 Unité de poinçonnage pour opérations de poinçonnage

Country Status (3)

Country Link
EP (1) EP0734799B1 (fr)
JP (1) JPH08267158A (fr)
DE (1) DE69613261T2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2610019A1 (fr) 2011-12-28 2013-07-03 TRUMPF Werkzeugmaschinen GmbH + Co. KG Matrice d'outils pour une unité d'outil

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002018793A (ja) * 2000-06-30 2002-01-22 Elna Co Ltd プリント配線板の打ち抜き加工方法およびプリント配線板
JP5732230B2 (ja) * 2010-11-01 2015-06-10 ユニプレス株式会社 打抜き加工方法及び金型
JP2014050889A (ja) * 2013-10-18 2014-03-20 Unipres Corp 自動車変速機用クラッチドラム
JP2019063845A (ja) * 2017-10-04 2019-04-25 トヨタ自動車株式会社 ロータコアの製造方法

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1169404B (de) * 1959-09-02 1964-05-06 Kienzle Apparate Gmbh Werkzeug zum Stanzschneiden von Blech
JPS61195719A (ja) * 1985-02-25 1986-08-30 Matsushita Electric Works Ltd 打抜き加工品の製法
JPS6272438A (ja) * 1985-09-25 1987-04-03 Hitachi Ltd 板材の打抜き加工装置
JPS63101029A (ja) * 1986-10-17 1988-05-06 Takiron Co Ltd パンチングプレ−トの製造法
JPH03275224A (ja) * 1990-03-23 1991-12-05 Hitachi Cable Ltd 順送金型によるリードフレームの打抜き加工方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2610019A1 (fr) 2011-12-28 2013-07-03 TRUMPF Werkzeugmaschinen GmbH + Co. KG Matrice d'outils pour une unité d'outil
WO2013098154A1 (fr) 2011-12-28 2013-07-04 Trumpf Werkzeugmaschinen Gmbh + Co. Kg Matrice-outil pour une unité outil

Also Published As

Publication number Publication date
DE69613261D1 (de) 2001-07-19
JPH08267158A (ja) 1996-10-15
EP0734799A3 (fr) 1997-04-16
EP0734799A2 (fr) 1996-10-02
DE69613261T2 (de) 2002-06-13

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