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EP1103317B1 - Procédé et dispositif de poinçonnage des pièces en tôle d' aluminium - Google Patents

Procédé et dispositif de poinçonnage des pièces en tôle d' aluminium Download PDF

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Publication number
EP1103317B1
EP1103317B1 EP20000125744 EP00125744A EP1103317B1 EP 1103317 B1 EP1103317 B1 EP 1103317B1 EP 20000125744 EP20000125744 EP 20000125744 EP 00125744 A EP00125744 A EP 00125744A EP 1103317 B1 EP1103317 B1 EP 1103317B1
Authority
EP
European Patent Office
Prior art keywords
punch
die
sheet metal
hole
cutting
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
EP20000125744
Other languages
German (de)
English (en)
Other versions
EP1103317A3 (fr
EP1103317A2 (fr
Inventor
Gerhard Dipl.-Ing. Söllner
Jürgen Breer
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.)
Hydro Aluminium Deutschland GmbH
Original Assignee
Hydro Aluminium Deutschland GmbH
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 Hydro Aluminium Deutschland GmbH filed Critical Hydro Aluminium Deutschland GmbH
Publication of EP1103317A2 publication Critical patent/EP1103317A2/fr
Publication of EP1103317A3 publication Critical patent/EP1103317A3/fr
Application granted granted Critical
Publication of EP1103317B1 publication Critical patent/EP1103317B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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

Definitions

  • the invention relates to a method and a device for punching sheet metal parts from an aluminum material in which holes are produced in the flange areas, according to the preamble of claims 1 and 2.
  • Such a method and apparatus are known from JP-A-53107787.
  • Holes are often provided in the flange areas of shaped sheet metal parts, which are used for screwing these shaped sheet metal parts with an overall construction.
  • the mechanical strength of these holes using fittings is on the one hand low because the flange areas are hardly deformed during deep drawing and calibration of the sheet metal parts and thus the aluminum material in the vicinity of the holes is relatively soft due to a lack of work hardening.
  • no method or device is known with which can be produced in the immediate vicinity of the holes in the flange portions thickenings for the use of washers. Such thickening increases the mechanical strength of the screw through the higher material thickness in the field of force.
  • the invention has for its object to provide a method and apparatus for punching sheet metal parts made of an aluminum material available, with which the mechanical strength of holes, especially in the flange of sheet metal parts is significantly improved ,
  • the previously derived and indicated object is achieved by the subject matter of claim 1, wherein along the hole circumference a thickening is produced by a pre-deformation, the sheet metal part is held during pre-forming between a hold-down and a die and in the pre-deformation a stamp the material is displaced from the hole area in the die.
  • the first teaching of the invention ensures the production of an already in itself by the greater thickness increased mechanical strength in the region of the hole. This is further increased by the fact that takes place during the displacement of the aluminum material from the hole area in the die work hardening.
  • the material remaining after the pre-deformation in the hole area material is removed by shear cutting. This configuration allows the completion of the hole in one step and ensures that the hole has clean cut edges that counteract cracking.
  • a further improvement in terms of production technology is experienced by the method according to the first teaching of the invention in that the pre-deformation and the shear cutting take place in one working stroke of a tool.
  • the invention relates to a device for punching sheet metal parts made of aluminum materials, in particular for realizing a method according to the first teaching of the invention.
  • a device for punching sheet metal parts made of aluminum materials in particular for realizing a method according to the first teaching of the invention.
  • the above-derived and indicated object is achieved by the subject matter of claim 2, wherein a hold-down and a die are provided and a punch for displacing the material from the hole area is provided in the die.
  • Such a device according to the second teaching of the invention makes it possible to produce a hole in the flange areas of sheet metal parts made of aluminum materials, wherein the sheet metal parts are clamped between the blank holder and the die and the punch displaces the excess material in the hole area in the form of the thickening template.
  • This device thus enables the production of holes in sheet metal parts, which, as has already been carried out with regard to the first teaching of the invention, a significantly higher mechanical strength of the Verschraubungsus between the sheet metal parts with an overall construction.
  • the punch is designed to displace the material as a cutting punch, so that this allows after the displacement of the material into the die together with a cutting plate, the completion of the perforation by shear cutting.
  • a particularly advantageous embodiment undergoes the device according to the second teaching of the invention in that the die in the hole area connected to a retraction mechanism, displaceable Has completion stamp.
  • the retraction mechanism ensures after completion of the displacement of the aluminum material in the die through the opening of the die in the hole area for the fact that the punch to displace the material with the remaining part of the die as a cutting punch and cutting plate cooperate.
  • displaceable closing punch is also connected to an ejection mechanism, it is ensured that the perforated punch is ejected with the aid of the displaceable closing punch after shearing the bottom.
  • the non-inventive device shown schematically in FIG. 1 has a holding-down device 1 and a die 2 for fixing a sheet-metal shaped part 3.
  • the die 2 in turn has a recess 4, in which the material of the Belchformmaschines is displaced by a punch 5 from the hole portion 6 and forms the thickening 7 after this displacement.
  • the aluminum material flows from the hole region 6 into the vicinity of the circumference of the hole region 6, whereby the thickening 7 forms with a relatively uniform, work-hardened material structure.
  • FIG. 2 The illustrated in Fig. 2 embodiment of an apparatus according to the invention for punching sheet metal parts made of aluminum materials has a tool frame 8, on which a hold-down 9, a die 10 and a punch 11 are arranged.
  • the die 10 has in the illustrated embodiment in the hole area on a not shown in detail retraction mechanism and also not shown in detail ejector mechanism, sliding end punch 13.
  • the displaceable end punch 13 allows the displacement of the aluminum material from the hole area by the punch and the subsequent shear cutting of the leftover remainder of the material in the hole area
  • the displaceable end punch 13 is retracted after the displacement of the material from the hole area in the thickening relative to the base body 14 of the die 10, so that the cutting edge 15 of the Base 14 of the die 10 is released.
  • the ejector mechanism not shown, ensures that the displaceable end punch 13 is displaced upwardly out of the main body 14 of the die 10, so that the perforated butt is ejected.
  • the section shown in FIG. 3 through a hole made in accordance with the invention in the flange region of a sheet metal part 3 shows the thickening 7 along the circumference of the hole.
  • the method according to the invention and the device according to the invention ensure a thickening 7 with a homogeneous material structure and partial work hardening with simultaneously clean hole edges.
  • the inventive method and device according to the invention are therefore particularly suitable both for non-hardenable Al-sheet alloys, as they are regularly deformed in the soft state and thus are often too soft in the flange for a mechanically sufficient screwing, as well as for thermosetting sheet metal materials in the T4 condition (cold cured) deformed or used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Forging (AREA)
  • Punching Or Piercing (AREA)

Claims (4)

  1. Procédé pour la perforation de pièces moulées en tôle (3) d'aluminium, dans lequel des trous sont ménagés dans les zones des brides, une épaisseur (7) est fabriquée par préformage le long du bord desdits trous, la pièce moulée en tôle (3) est maintenue, durant le préformage, entre un support inférieur (9) et une matrice (10), le matériau, durant le préformage, est embouti par un poinçon (11), hors de la zone du trou, dans la matrice (10), et le matériau qui subsiste dans la zone du trou après la déformation est éliminé par des cisailles d'ébavurage, la déformation et l'ébavurage s'effectuant en une course de travail, caractérisé en ce que le matériau est embouti dans un creux de la matrice (10) faisant face au poinçon (11) et entourant le poinçon (11).
  2. Dispositif pour la perforation de pièces moulées en tôle d'aluminium, en particulier pour la réalisation d'un procédé selon la revendication 1, composé d'un support inférieur (9), d'une matrice (10) et d'un poinçon (11) pour l'emboutissage du matériau hors de la zone du trou, dans la matrice (10), dans lequel un poinçon d'ébavurage et une matrice d'ébavurage sont prévus et le poinçon (11) pour l'emboutissage du matériau est conçu sous la forme d'un poinçon d'ébavurage, caractérisé en ce que la matrice (10) présente un creux faisant face au poinçon (11) et entourant le poinçon (11).
  3. Dispositif selon la revendication 2, caractérisé en ce que la matrice (10) présente, dans la zone du trou, un poinçon final (13) mobile, relié à un mécanisme de retrait.
  4. Dispositif selon la revendication 3, caractérisé en ce que le poinçon final (13) est relié à un mécanisme d'éjection.
EP20000125744 1999-11-26 2000-11-24 Procédé et dispositif de poinçonnage des pièces en tôle d' aluminium Expired - Lifetime EP1103317B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19957076 1999-11-26
DE1999157076 DE19957076B4 (de) 1999-11-26 1999-11-26 Verfahren und Vorrichtung zum Lochen von Blechformteilen aus einem Aluminiumwerkstoff

Publications (3)

Publication Number Publication Date
EP1103317A2 EP1103317A2 (fr) 2001-05-30
EP1103317A3 EP1103317A3 (fr) 2002-02-06
EP1103317B1 true EP1103317B1 (fr) 2006-01-18

Family

ID=7930507

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20000125744 Expired - Lifetime EP1103317B1 (fr) 1999-11-26 2000-11-24 Procédé et dispositif de poinçonnage des pièces en tôle d' aluminium

Country Status (4)

Country Link
EP (1) EP1103317B1 (fr)
DE (2) DE19957076B4 (fr)
ES (1) ES2257256T3 (fr)
PT (1) PT1103317E (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7308814B2 (en) 2005-10-13 2007-12-18 Gassner Ges.M.B.H. & Co Kg Method for perforating a sheet
DE102016205492A1 (de) 2016-04-04 2017-10-05 Thyssenkrupp Ag Verfahren und Vorrichtung zum Umformen eines Halbzeugs
CN109500219A (zh) * 2018-12-18 2019-03-22 常州工利精机科技有限公司 一种孔类冲裁模具及孔类冲裁方法
CN109940086B (zh) * 2019-02-27 2021-02-12 江苏省金鑫安防设备有限公司 一种防火门生产工艺

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE841436C (de) * 1949-09-14 1952-06-16 Stihl Andreas Verfahren zur Herstellung von scharfrandigen Aushalsungen an Blechtafeln aus hartem Werkstoff
DE2536611A1 (de) * 1975-08-16 1977-02-24 Daimler Benz Ag Verfahren zum spanlosen lochen von blechen
JPS53107787A (en) * 1977-03-02 1978-09-20 Toyota Motor Corp Pressure working apparatus

Also Published As

Publication number Publication date
DE50012075D1 (de) 2006-04-06
ES2257256T3 (es) 2006-08-01
DE19957076A1 (de) 2001-06-07
EP1103317A3 (fr) 2002-02-06
DE19957076B4 (de) 2006-10-19
PT1103317E (pt) 2006-05-31
EP1103317A2 (fr) 2001-05-30

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