EP0819482B1 - Procédé de formation d'un récipient concave à partir d'un flan de tole - Google Patents

Procédé de formation d'un récipient concave à partir d'un flan de tole Download PDF

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Publication number
EP0819482B1
EP0819482B1 EP19970401716 EP97401716A EP0819482B1 EP 0819482 B1 EP0819482 B1 EP 0819482B1 EP 19970401716 EP19970401716 EP 19970401716 EP 97401716 A EP97401716 A EP 97401716A EP 0819482 B1 EP0819482 B1 EP 0819482B1
Authority
EP
European Patent Office
Prior art keywords
blank
pass
peripheral strip
passes
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
EP19970401716
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0819482A1 (fr
Inventor
Jean Wendling
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.)
Dehon Service
Original Assignee
Dehon Service
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 Dehon Service filed Critical Dehon Service
Publication of EP0819482A1 publication Critical patent/EP0819482A1/fr
Application granted granted Critical
Publication of EP0819482B1 publication Critical patent/EP0819482B1/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
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/24—Making hollow objects characterised by the use of the objects high-pressure containers, e.g. boilers, bottles
    • 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
    • B21D51/02—Making hollow objects characterised by the structure of the objects
    • B21D51/08—Making hollow objects characterised by the structure of the objects ball-shaped objects

Definitions

  • the invention has its origin in the manufacture of metal bottles intended to contain a pressurized fluid, for example a liquefied gas, bottles comprising a body, of generally cylindrical shape, with a concave cover and bottom.
  • a pressurized fluid for example a liquefied gas
  • bottles comprising a body, of generally cylindrical shape, with a concave cover and bottom.
  • a pressurized fluid for example a liquefied gas
  • bottles can be made in two parts - two half-shells welded together - or in three parts-two half-shells welded to a ferrule.
  • Half a shell is consisting of a concave part extended by a cylindrical neck of more or less important height.
  • the present application relates to a process for forming a concave container from a blank, or from a plate (blank round), sheet metal.
  • the present invention aims to propose a method for forming a concave container from a sheet blank, which forces the sheet to the minimum and which is freed from the subsequent heat treatment.
  • the present invention relates to a method defined by claim 1.
  • Document DE-2 450 624-A describes a process according to the preamble of claim 1.
  • the sheet thus stamped without stresses excessive, has elastic limit, elongation and tensile strength within satisfactory ranges.
  • the invention provides for several punches passes, that is to say at least two.
  • the peripheral strip is only held by a blank holder at the very beginning of the pass, before the sheet metal blank comes to marry the associated punch.
  • the sheet blank is curved during three passes punches.
  • the bottle of Figure 1 has a body 1, of general shape cylindrical, consisting of two half-shells 2, 3 welded together.
  • Each of the half-shells consists of a concave part 4 and a cylindrical neck 5 extending the periphery of the concave part.
  • Both 3,4 half-shells are joined together by their necks, by through a solder joint 22, preferably made by laser for avoid local tensions.
  • the bottle is provided with a base 19 forming a base.
  • the foot is here made of thermoplastic material, for recycling purposes. In shape complementary to that of the concave part 4, the foot 19 is glued to it.
  • a gripping neck 20 In shape complementary to that of the concave part 4, the foot 19 is glued to it.
  • a gripping neck 20 with an annular part 23 breakthrough of grip openings 21.
  • the foot and the gripping neck could be made of metal or any other material secured to the bottle by shrinking, bonding, welding or other means of attachment.
  • the bottle of figure 2 is very similar to that of figure 1, the same elements of the two bottles being designated by the same references. Unlike the bottle of figure 1, that of figure 2 is in three parts, the two half-shells 11, 12 being joined together via a ferrule 6.
  • the half-shells 11, 12 have the same concave part 4 but this is extended by a peripheral neck 5 much smaller.
  • the ferrule 6 is produced from a sheet metal blank rectangular whose edges 7, 8 have been welded together after bending here blank. One could also proceed by rolling, knurling a sheet blank or by any other method.
  • the half-shells 11, 12 respectively form a cover and bottom joined to the shell 6 by two solder joints 9,10.
  • 2, 3, 11, 12 considered as concave containers, from a blank, or more precisely of a plate, of sheet metal 18. They are produced here in three stamping passes by three punches 16, 16A, 16B associated respectively to their dies and their hold-downs 13, 14, 15, in three conforming assemblies.
  • the plate 18 is placed on the matrix.
  • the peripheral strip 24 of the plate 18, held by the blank holder 13, is inclined at a first angle a on the starting plane 25 of the plate 18.
  • the punch 16, as well as its associated matrix, not shown, has a curve 17 adapted for that, at the end of the pass, the surfaces 17 and 26 of the punch 16 and the blank holder 13 extending from one another, in other words, to that there is surface continuity from one to the other of the two parts.
  • the peripheral strip 24 has therefore been straightened around a central portion 27 of the plate 18 in one direction. Then we opens the conformator to perform the next pass.
  • the objective of the second pass is to accentuate the straightening of the peripheral strip 24 around the central portion 27, on the one hand, and to accentuate the curve of this central portion 27, on the other hand.
  • the peripheral strip 24 is held, by the blank holder 14 of surface 28, inclined by a second angle ⁇ on the starting plane 25 of stage 18, with the relation ⁇ > ⁇
  • the punch 16A has a surface 29 of convexity accentuated compared to that 17 of the punch 16 and such that, at the end of the pass, surfaces 28 and 29 of the blank holder and the punch are still in the extension of one another.
  • the third pass is here the last and it is distinguished from the first two by the fact that during this pass the peripheral strip 24 is raised vertically, straightened still beyond angles ⁇ and ⁇ of the two previous passes by an angle of 90 °, the angles ⁇ and ⁇ , in the present case being substantially equal respectively at 35 ° and 50 °.
  • the peripheral strip 24 thus straightened constitutes the cylindrical neck 5 of the half-shell.
  • the blank holder 15 only serves to hold the edge 24 at the start of the pass. Its spacing from the matrix 30 is such that it allows then the sheet, under the action of the punch 16B, to marry the matrix 30, under the blank holder 15.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Laser Beam Processing (AREA)
EP19970401716 1996-07-16 1997-07-16 Procédé de formation d'un récipient concave à partir d'un flan de tole Expired - Lifetime EP0819482B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9609046 1996-07-16
FR9609046A FR2751247B1 (fr) 1996-07-16 1996-07-16 Procede de fabrication d'une bouteille metallique destinee a contenir un fluide sous pression

Publications (2)

Publication Number Publication Date
EP0819482A1 EP0819482A1 (fr) 1998-01-21
EP0819482B1 true EP0819482B1 (fr) 2001-03-28

Family

ID=9494218

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19970401716 Expired - Lifetime EP0819482B1 (fr) 1996-07-16 1997-07-16 Procédé de formation d'un récipient concave à partir d'un flan de tole

Country Status (5)

Country Link
EP (1) EP0819482B1 (pt)
DE (1) DE69704400T2 (pt)
ES (1) ES2157536T3 (pt)
FR (1) FR2751247B1 (pt)
PT (1) PT819482E (pt)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2947467B1 (fr) * 2009-07-03 2011-06-10 Peugeot Citroen Automobiles Sa Machine a emboutir les flans galbes

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT316270B (de) * 1972-09-22 1974-07-10 Verzinkerei Zug Ag Tiefziehverfahren und Tiefziehwerkzeug zur Durchführung des Verfahrens
PL85400B1 (pt) * 1973-10-30 1976-04-30 Raciborska Fabryka Kotlow Rafakopo
GB2083383A (en) * 1980-09-11 1982-03-24 Alumasc Ltd Keg
DE4137453C1 (pt) * 1991-11-14 1992-05-27 Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
FR2729594B1 (fr) * 1995-01-19 1997-03-21 Cerec Procede et dispositif de formage a froid de fonds bombes

Also Published As

Publication number Publication date
FR2751247B1 (fr) 1998-10-16
DE69704400D1 (de) 2001-05-03
ES2157536T3 (es) 2001-08-16
FR2751247A1 (fr) 1998-01-23
PT819482E (pt) 2001-09-28
DE69704400T2 (de) 2001-10-31
EP0819482A1 (fr) 1998-01-21

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