EP0819482A1 - Verfahren zum Formen eines konkaven Behälters aus einer Blechplatine - Google Patents

Verfahren zum Formen eines konkaven Behälters aus einer Blechplatine Download PDF

Info

Publication number: EP0819482A1
Authority: EP; European Patent Office
Prior art keywords: blank; sheet; pass; peripheral strip; passes
Prior art date: 1996-07-16
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.): Granted

Application number

EP97401716A

Other languages

English (en)

French (fr)

Other versions

EP0819482B1 (de

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.)

1996-07-16

Filing date

1997-07-16

Publication date

1998-01-21

1997-07-16 Application filed by Dehon Service filed Critical Dehon Service

1998-01-21 Publication of EP0819482A1 publication Critical patent/EP0819482A1/de

2001-03-28 Application granted granted Critical

2001-03-28 Publication of EP0819482B1 publication Critical patent/EP0819482B1/de

2017-07-16 Anticipated expiration legal-status Critical

Status 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 originates from 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.
These bottles can be produced in two parts - two half-shells welded together - or in three parts-two half-shells welded to a ferrule.
a half-shell is made up of a concave part extended by a cylindrical neck of greater or lesser height.
the present application relates to a process for forming a concave container from a blank, or from a plate (round blank), of sheet metal.
the present invention aims to provide a method of forming a concave container from a sheet blank, which stresses the sheet to the minimum and which overcomes the subsequent heat treatment.
the sheet thus stamped without excessive stresses, has parameters of elastic limit, elongation and resistance to rupture comprised within satisfactory ranges.
the peripheral strip is held in place by a hold-down clamp only at the very start of the pass, before the sheet blank comes to marry the associated punch.
the sheet blank is curved during three punches passes.
the bottles which will now be described, both in their structure and in their manufacturing process, have been produced from a sheet of metal sheet, for example steel or aluminum, here of a small thickness (a few millimeters or even less ) and according to a diameter here always of a few hundred millimeters.
the bottle of Figure 1 comprises a body 1, of generally cylindrical shape, 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.
the two half-shells 3,4 are joined together, by their necks, by means of a solder joint 22, preferably made by laser to 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. Of complementary shape to that of the concave part 4, the foot 19 is glued to it.
a gripping neck 20 there is also here provided, also made of thermoplastic material and bonded to the bottle, a gripping neck 20, with an annular part 23 pierced with gripping openings 21.
the foot and the gripping neck could be made of metal or any other material secured to the bottle by shrinking, gluing, welding or other means of fixing.
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 by means of a ferrule 6.
the half-shells 11, 12 have the same concave part 4 but this is extended by a much smaller peripheral neck 5.
the ferrule 6 is produced from a rectangular sheet blank whose edges 7, 8 have been welded together after bending the blank here. 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 a bottom joined to the shell 6 by two solder joints 9, 10.
the plate 18 is placed on the matrix.
the blank holder 13 is lowered to first exert slight pressure on a peripheral strip 24 of the plate. Then the blank holder 13 and the punch 16 are lowered to exert greater pressure and press the plate 18 against the bottom of the die of the former.
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 thus besides that its associated matrix not shown, has a curve 17 adapted so that, at the end of the pass, the surfaces 17 and 26 of the punch 16 and the blank holder 13 are in the extension of one another, in other words, so 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 the conformator is opened to carry out 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 accentuated convexity compared to that 17 of the punch 16 and such that, at the end of the pass, the surfaces 28 and 29 of the blank holder and the punch are still in the extension l one of the other.
the third pass is the last here 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 the angles ⁇ and ⁇ of the two previous passes by an angle of 90 °, the angles ⁇ and ⁇ , in the present case being substantially equal to 35 ° and 50 ° respectively.
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 then authorizes the sheet, under the action of the punch 16B, to come to marry the matrix 30, under the blank holder 15.
half shells could be formed in two passes or more than three passes, depending on the circumstances.
the sheet As the sheet is very slightly stressed during its forming and therefore it will not need to undergo any heat treatment, it may have been previously coated with a layer of anticorrosion protection.

Landscapes

Engineering & Computer Science (AREA)
Mechanical Engineering (AREA)
Shaping Metal By Deep-Drawing, Or The Like (AREA)
Laser Beam Processing (AREA)
Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)

EP19970401716 1996-07-16 1997-07-16 Verfahren zum Formen eines konkaven Behälters aus einer Blechplatine Expired - Lifetime EP0819482B1 (de)

Applications Claiming Priority (2)

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

Publications (2)

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

Family

ID=9494218

Family Applications (1)

Application Number	Title	Priority Date	Filing Date
EP19970401716 Expired - Lifetime EP0819482B1 (de)	1996-07-16	1997-07-16	Verfahren zum Formen eines konkaven Behälters aus einer Blechplatine

Country Status (5)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2011001053A1 (fr) *	2009-07-03	2011-01-06	Peugeot Citroën Automobiles SA	Machine a emboutir les flans galbes

Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2200067A1 (en) *	1972-09-22	1974-04-19	Verzinkerei Zug Ag	Deep drawing - to give products free from folds and not requiring finishing
DE2450624A1 (de) *	1973-10-30	1975-05-07	Raciborska Fabryka Kotlow Rafa	Vorrichtung zum pressen von tiefen, duennwandigen behaelterboeden mit grossen durchmessern
GB2083383A (en) *	1980-09-11	1982-03-24	Alumasc Ltd	Keg
DE4137453C1 (de) *	1991-11-14	1992-05-27	Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
WO1996022168A1 (fr) *	1995-01-19	1996-07-25	Cerec	Procede et dispositif de formage a froid de fonds bombes

1996
- 1996-07-16 FR FR9609046A patent/FR2751247B1/fr not_active Expired - Fee Related
1997
- 1997-07-16 EP EP19970401716 patent/EP0819482B1/de not_active Expired - Lifetime
- 1997-07-16 DE DE1997604400 patent/DE69704400T2/de not_active Expired - Lifetime
- 1997-07-16 ES ES97401716T patent/ES2157536T3/es not_active Expired - Lifetime
- 1997-07-16 PT PT97401716T patent/PT819482E/pt unknown

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
FR2200067A1 (en) *	1972-09-22	1974-04-19	Verzinkerei Zug Ag	Deep drawing - to give products free from folds and not requiring finishing
DE2450624A1 (de) *	1973-10-30	1975-05-07	Raciborska Fabryka Kotlow Rafa	Vorrichtung zum pressen von tiefen, duennwandigen behaelterboeden mit grossen durchmessern
GB2083383A (en) *	1980-09-11	1982-03-24	Alumasc Ltd	Keg
DE4137453C1 (de) *	1991-11-14	1992-05-27	Mercedes-Benz Aktiengesellschaft, 7000 Stuttgart, De
WO1996022168A1 (fr) *	1995-01-19	1996-07-25	Cerec	Procede et dispositif de formage a froid de fonds bombes

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
WO2011001053A1 (fr) *	2009-07-03	2011-01-06	Peugeot Citroën Automobiles SA	Machine a emboutir les flans galbes
FR2947467A1 (fr) *	2009-07-03	2011-01-07	Peugeot Citroen Automobiles Sa	Machine a emboutir les flans galbes

Also Published As

Publication number	Publication date
DE69704400D1 (de)	2001-05-03
DE69704400T2 (de)	2001-10-31
ES2157536T3 (es)	2001-08-16
PT819482E (pt)	2001-09-28
FR2751247B1 (fr)	1998-10-16
FR2751247A1 (fr)	1998-01-23
EP0819482B1 (de)	2001-03-28

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