EP0451013B1 - Verfahren und Vorrichtung zum Herstellen eines gewölbten Teils in einem Blechgegenstand und nach diesem Verfahren hergestellter Gegenstand - Google Patents

Verfahren und Vorrichtung zum Herstellen eines gewölbten Teils in einem Blechgegenstand und nach diesem Verfahren hergestellter Gegenstand Download PDF

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Publication number
EP0451013B1
EP0451013B1 EP91400795A EP91400795A EP0451013B1 EP 0451013 B1 EP0451013 B1 EP 0451013B1 EP 91400795 A EP91400795 A EP 91400795A EP 91400795 A EP91400795 A EP 91400795A EP 0451013 B1 EP0451013 B1 EP 0451013B1
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EP
European Patent Office
Prior art keywords
punch
zone
preforming
embossed part
sheet metal
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
EP91400795A
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English (en)
French (fr)
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EP0451013A1 (de
Inventor
Gérard Heurteboust
Jean-François Seconde
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.)
Sollac SA
Original Assignee
Sollac SA
Lorraine de Laminage Continu SA SOLLAC
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 Sollac SA, Lorraine de Laminage Continu SA SOLLAC filed Critical Sollac SA
Publication of EP0451013A1 publication Critical patent/EP0451013A1/de
Application granted granted Critical
Publication of EP0451013B1 publication Critical patent/EP0451013B1/de
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
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/38—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures
    • B21D51/383—Making inlet or outlet arrangements of cans, tins, baths, bottles, or other vessels; Making can ends; Making closures scoring lines, tear strips or pulling tabs

Definitions

  • the subject of the present invention is a method and a device for forming a raised part on a sheet blank, for example a rivet of a so-called easy opening lid for metal boxes or various containers.
  • the present invention also relates to a product comprising a raised part obtained by the method according to the invention.
  • the processes for forming a raised part on a sheet blank, used up to now, consist in carrying out a succession of stamping operations using several sets of die and punch in order to gradually form blanks. until the final obtaining of said raised part.
  • a flat sheet metal blank 1 is placed in a first set of matrix 2 and punch 3 so as to achieve, by bringing together said matrix 2 and said punch 3, an expansion of said sheet blank on a zone located in forming a first bubble-shaped blank 1a (Fig. 1a).
  • this first blank 1a is placed in a second set of matrix 4 and punch 5 (Fig. 1b) to produce a first neck forming a second blank 1b
  • this second blank 1b thus formed is placed in a third set of matrix 6 and punch 7 (Fig. 1c) to make a second neck forming a third blank 1c
  • this third blank 1c is finally placed in a fourth die set 8 and punch 9 (Fig. 1d) in order to obtain the raised part final 1d, said punch 9 having dimensions substantially equivalent to said part in relief.
  • This thinning is due to a concentration of the deformations in a limited area of the sheet blank during the successive forming phases.
  • thin irons which are generally very hardened, are characterized by their stiffness and their low ability to deform so that expanding forming proves to be very difficult to carry out, since the metal at the periphery of the part relief does not participate in the deformations, and there is generally a rupture of the metal at the top of said raised part.
  • the object of the present invention is in particular to remedy these drawbacks by proposing a method and a drawing device according to claims 1 and 6.
  • the surface of the localized preformed zone is substantially equivalent to that of said localized zone after final forming.
  • the present invention also relates to the application of the method to the production of a rivet of a so-called easy opening cover.
  • the device for forming, according to the invention, a part in relief on a sheet blank 10, such as a rivet of a cover said to be easy opening, consists of a die set and preforming punch respectively 20 and 25 (Fig. 2) and a die set and shaping punch respectively 30 and 35 (Fig. 3).
  • the die 20 and the punch 25 for preforming have imprints of complementary shape to produce, as will be seen later, on a localized area of the sheet blank (10) a succession of undulations.
  • the imprints of the preforming matrix 20 are constituted by a series of projections 21a, 21b and 21c and of recesses 22a, 22b and 22c for example three in number and whose height increases from the center towards the periphery of said matrix 20 .
  • the imprints of the preforming punch 25 consist of a series of projections 26a, 26b and 26c and of recesses 27a, 27b and 27c, the height of which decreases from the center towards the periphery of said punch 25.
  • the projection 26a of the punch 25 and the hollow 22a of the preforming die 20 have a shape substantially equivalent to the shape of the raised part which it is desired to obtain on the sheet blank 10.
  • the projecting part 26a of the punch 25 and the hollow 22a of the die 20 have a cylindrical shape and the projections 21a, 21b, 21c and 26a, 26b, 26c respectively of the die 20 and the punch 25 are constituted by radial rings.
  • the shaping matrix 30 has an imprint 31 and the shaping punch 35 has a projection 36 of shape complementary to said imprint 31 and also identical to the shape of the raised part which it is desired to obtain on the blank 10.
  • the forming method according to the invention consists of two successive operations, a preforming operation using the die 20 and the punch 25 and a shaping operation using the die 30 and the punch 35.
  • the flat sheet blank 10 is placed between the die 20 and the preform punch 25, said sheet blank being held, for example, by peripheral blank clamps not shown.
  • the die 20 descends and at the start of the stamping, the projection 21c comes into contact with the blank 10 which is itself in contact with the projection 26a of the punch 25 (FIG. 4a).
  • This first phase makes it possible to determine on the blank 10 a localized zone A (FIG. 6) on which the stresses will be uniformly distributed, while the peripheral zone of the blank surrounding the localized zone A, kept pressed by the blank holder, is not stretched and does not undergo deformations.
  • the matrix 20 continues to descend so that the projections 21b, 26b and 21a, 26c come into contact with the blank 10 (Fig. 4b), then gradually interpenetrate (Fig. 4c) until the moment when the the highest projection, that is to say the projection 21c, comes to bear in the hollow 27c of the punch 25.
  • This preforming operation therefore causes the material to deform in several places and allows the surface to be deformed to be divided into several annular sections.
  • the material thins at the level of the support of the projection (s) and, during the formation of the step corrugations, the initial deformations are kept blocked under the contact effect of said projections.
  • the surface of the preformed localized zone A is substantially equivalent to said localized zone after final shaping of the raised part.
  • the punch 35 of conformation comprises means for controlling the constriction of the blank 10 during the unfolding of the corrugations 10d and the conformation of the raised part 10a.
  • control means are formed by rings 37 arranged either at the level of the reliefs or at the level of the hollows of the corrugations 10d, and pressurized for example by springs 38.
  • the method and the device according to the invention therefore make it possible to form a raised part on a sheet metal blank in two operations.
  • the invention applies to all types of material and allows the use of strongly hardened thin irons with a thickness of between 0.10 and 0.20 mm, in particular for lids with easy opening of metal boxes or various containers.
  • the covers have a smaller thickness which leads to a gain in weight, a lower cost and a lower opening effort of these covers.
  • the invention applies not only to the forming of raised parts of circular section, such as rivets for covers, but also to the forming of raised parts of any section and possibly variable depending on the height of said raised part. .

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Making Paper Articles (AREA)
  • Manufacturing Of Printed Wiring (AREA)
  • Container Filling Or Packaging Operations (AREA)
  • Packaging For Recording Disks (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Physical Vapour Deposition (AREA)
  • Powder Metallurgy (AREA)
  • Forging (AREA)
  • Electrical Discharge Machining, Electrochemical Machining, And Combined Machining (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)

Claims (8)

  1. Verfahren zum Ausbauchen eines erhabenen Abschnitts (10a) auf einem Blechzuschnitt (10) mittels einer Matrize und eines Stempels, wobei in dem Verfahren auf wenigstens einer örtlich begrenzten Zone A des Blechzuschnitts (10) mit größeren Abmessungen als diejenigen des erhabenen Abschnitts (10a) ein Vorformungsvorgang durchgefuhrt wird, der in einer Herstellung einer Wellung auf einer zwischen dem zukünftigen hohen Abschnitt (10b) des erhabenen Abschnitts (10a) und dem Rand der Zone A gelegenen Zwischenzone B besteht, dann ein Formgebungsvorgang zum Formen des erhabenen Abschnitts (10a) durchgeführt wird, in dessen Verlauf die Wellung der Zwischenzone (B) entfaltet wird und der erhabene Abschnitt (10a) geformt wird, dadurch gekennzeichnet, daß im Verlauf des Vorformungsvorgangs eine Aufeinanderfolge von Wellungen in Treppen (10d), die auf einer gleichen Seite des Blechzuschnitts (10) liegen, hergestellt wird, und im Verlauf des Formgebungsvorgangs nacheinander die Wellungen in Treppen (10d) von der Mitte zum Rand hin entfaltet werden.
  2. Ausbauchungsverfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Fläche der vorgeformten örtlich begrenzten Zone im wesentlichen derjenigen der örtlich begrenzten Zone nach der Fertigformung entspricht.
  3. Verfahren nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, daß es auf die Herstellung eines Niet von Aufreißdeckeln angewandt wird.
  4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß der Niet aus einem Blechzuschnitt (10) aus stark hartgeschmiedetem dünnen Eisen geformt wird.
  5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß der Blechzuschnitt (10) eine Dicke zwischen 0,10 und 0,20 mm hat.
  6. Vorrichtung zum Ausbauchen eines erhabenen Abschnitts (10a) auf einem Blechzuschnitt (10), mit einem Satz aus Matrize (20) und Stempel (25) zur Vorformung und einem Satz aus Matrize (30) und Stempel (35) zur Formgebung, wobei die Matrize (20) und der Stempel (25) zur Vorformung jeweils mit komplementären Prägungen zur Ausbildung einer Wellung auf einer örtlich begrenzten Zone A des Blechzuschnitts (10) mit einer Abmessung, die über derjenigen des zu formenden erhabenen Abschnitts (10a) liegt, versehen sind, dadurch gekennzeichnet, daß die Prägungen des Satzes aus Matrize (20) und Stempel (25) zur Vorformung durch eine Reihe von konzentrischen Vorsprüngen (21a, 21b,... und 26a, 26b,...) und Ausnehmungen (22a, 22b... und 27a,. 27b...) gebildet sind, wobei die Vorsprünge (21a, 21b...) und die Ausnehmungen (22a, 22b...) der Vorformungsmatritze eine von der Mitte zum Rand der Matrize zunehmende Höhe und die Vorsprünge (26a, 26b...) und die Ausnehmungen (27a, 27b...) des Vorformungsstempels (25) eine von der Mitte zum Rand des Stempels hin abnehmende Höhe haben.
  7. Ausbauchungsvorrichtung nach Anspruch 6, dadurch gekennzeichnet, daß der Formgebungsstempel (35) Mittel zur Kontrolle der Querschnittsverminderung des Blechzuschnitts (10) beim Entfalten der Wellungen in Treppen (10d) und der Formgebung des erhabenen Abschnitts (10a) aufweist.
  8. Ausbauchungsvorrichtung nach Anspruch 7, dadurch gekennzeichnet, daß die Mittel zur Kontrolle der Querschnittsverminderung durch bewegliche Ringe (37) gebildet sind, die beispielsweise durch Federn (38) unter Druck gesetzt werden.
EP91400795A 1990-04-03 1991-03-25 Verfahren und Vorrichtung zum Herstellen eines gewölbten Teils in einem Blechgegenstand und nach diesem Verfahren hergestellter Gegenstand Expired - Lifetime EP0451013B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9004264A FR2660220B1 (fr) 1990-04-03 1990-04-03 Procede et dispositif de formage d'une partie en relief sur un flan de tole et produit obtenu selon ce procede.
FR9004264 1990-04-03

Publications (2)

Publication Number Publication Date
EP0451013A1 EP0451013A1 (de) 1991-10-09
EP0451013B1 true EP0451013B1 (de) 1994-05-18

Family

ID=9395407

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91400795A Expired - Lifetime EP0451013B1 (de) 1990-04-03 1991-03-25 Verfahren und Vorrichtung zum Herstellen eines gewölbten Teils in einem Blechgegenstand und nach diesem Verfahren hergestellter Gegenstand

Country Status (13)

Country Link
US (1) US5174146A (de)
EP (1) EP0451013B1 (de)
JP (1) JPH05305360A (de)
KR (1) KR100231074B1 (de)
AT (1) ATE105749T1 (de)
CA (1) CA2038958C (de)
DE (1) DE69102004T2 (de)
DK (1) DK0451013T3 (de)
ES (1) ES2056595T3 (de)
FI (1) FI112331B (de)
FR (1) FR2660220B1 (de)
NO (1) NO176239C (de)
PT (1) PT97213B (de)

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CH681614A5 (de) * 1991-07-03 1993-04-30 Soremartec Sa
FR2734182B1 (fr) * 1995-05-19 1997-07-25 Metal Box Plc Procede de fabrication d'un corps de rivet dans une plaque de metal
US6026573A (en) * 1997-05-14 2000-02-22 Dana Corporation Method for manufacturing a side rail for a vehicle frame assembly
CA2301813C (en) * 1998-06-24 2005-11-15 Weirton Steel Corporation Sheet metal rivet button fabrication
US6245180B1 (en) 1999-04-02 2001-06-12 Midwest Brake Bond Company Methods for bending brake lining material and for forming a lined brake shoe
US6669891B1 (en) * 1999-04-02 2003-12-30 Midwest Brake Bond Company Method and apparatus for producing brake lining material
JP2002092717A (ja) * 2000-09-20 2002-03-29 Sanyo Electric Co Ltd 自動販売機の扉装置
US7291946B2 (en) * 2003-01-27 2007-11-06 United Technologies Corporation Damper for stator assembly
TW200827460A (en) * 2006-08-11 2008-07-01 Nippon Steel Corp DR steel sheet and manufacturing method thereof
WO2008043173A1 (en) * 2006-10-13 2008-04-17 Magna International Inc. Metal forming with vibration assist
DE102008018656B9 (de) * 2008-04-11 2009-07-09 Thyssenkrupp Steel Ag Verfahren zur Herstellung von hochmaßhaltigen Halbschalen
CN101972807A (zh) * 2010-10-18 2011-02-16 烟台新科钢结构有限公司 一种波纹板连续压形生产方法及其设备
JP5965159B2 (ja) * 2012-02-22 2016-08-03 東プレ株式会社 プレス部品の成形方法
JP5869929B2 (ja) * 2012-03-21 2016-02-24 株式会社神戸製鋼所 タブ付缶蓋のリベット成形方法
GB201308927D0 (en) 2013-05-17 2013-07-03 Kraft Foods R & D Inc A beverage preparation system, a capsule and a method for forming a beverage
DE202014011505U1 (de) 2013-05-17 2021-06-24 Koninklijke Douwe Egberts B.V. Getränkeherstellungssystem
JP6120006B2 (ja) * 2014-03-19 2017-04-26 トヨタ紡織株式会社 金属板材のプレス成形方法及びプレス成形装置
JP6467791B2 (ja) * 2014-06-19 2019-02-13 大日本印刷株式会社 ブランク製造方法およびブランクを製造するための打抜機
US10717124B2 (en) * 2014-09-12 2020-07-21 Honda Motor Co., Ltd. Press forming method and plate material expansion device used in said method
GB201420262D0 (en) 2014-11-14 2014-12-31 Kraft Foods R & D Inc A method of forming a cup-shaped body for a beverage capsule
JP6659380B2 (ja) * 2016-01-29 2020-03-04 株式会社神戸製鋼所 プレス成形品の製造方法及びプレス成形装置
JP6988136B2 (ja) * 2017-04-03 2022-01-05 東洋製罐株式会社 シェルの製造方法及び缶蓋の製造方法
US10946432B2 (en) * 2017-11-29 2021-03-16 Alfons Haar, Inc. Method and apparatus for forming a beaded can end
US20190224739A1 (en) 2018-01-23 2019-07-25 Stolle Machinery Company, Llc Shell with expandable bubble and tooling therefor
US11059091B2 (en) 2018-01-23 2021-07-13 Stolle Machinery Company, Llc Shell with expandable rivet button and tooling therefor

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Also Published As

Publication number Publication date
CA2038958C (fr) 1999-07-13
DE69102004T2 (de) 1994-10-27
FR2660220B1 (fr) 1995-02-24
US5174146A (en) 1992-12-29
CA2038958A1 (fr) 1991-10-04
KR100231074B1 (ko) 1999-12-01
FI112331B (fi) 2003-11-28
ATE105749T1 (de) 1994-06-15
PT97213A (pt) 1993-05-31
FR2660220A1 (fr) 1991-10-04
NO176239B (no) 1994-11-21
NO911287D0 (no) 1991-04-02
DK0451013T3 (da) 1994-09-19
NO911287L (no) 1991-10-04
FI911576L (fi) 1991-10-04
JPH05305360A (ja) 1993-11-19
FI911576A0 (fi) 1991-04-02
PT97213B (pt) 1998-07-31
DE69102004D1 (de) 1994-06-23
EP0451013A1 (de) 1991-10-09
ES2056595T3 (es) 1994-10-01
NO176239C (no) 1995-03-01

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