EP0819482A1 - Verfahren zum Formen eines konkaven Behälters aus einer Blechplatine - Google Patents
Verfahren zum Formen eines konkaven Behälters aus einer Blechplatine Download PDFInfo
- Publication number
- EP0819482A1 EP0819482A1 EP97401716A EP97401716A EP0819482A1 EP 0819482 A1 EP0819482 A1 EP 0819482A1 EP 97401716 A EP97401716 A EP 97401716A EP 97401716 A EP97401716 A EP 97401716A EP 0819482 A1 EP0819482 A1 EP 0819482A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- blank
- sheet
- pass
- peripheral strip
- passes
- 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.)
- Granted
Links
Images
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)
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)
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)
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)
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)
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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