EP0733414B1 - Procédé de fabrication d'une boíte métallique de forme - Google Patents
Procédé de fabrication d'une boíte métallique de forme Download PDFInfo
- Publication number
- EP0733414B1 EP0733414B1 EP96400484A EP96400484A EP0733414B1 EP 0733414 B1 EP0733414 B1 EP 0733414B1 EP 96400484 A EP96400484 A EP 96400484A EP 96400484 A EP96400484 A EP 96400484A EP 0733414 B1 EP0733414 B1 EP 0733414B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- zone
- expanded
- expansion
- peripheral skirt
- elementary
- 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
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
- B21D15/00—Corrugating tubes
- B21D15/04—Corrugating tubes transversely, e.g. helically
- B21D15/06—Corrugating tubes transversely, e.g. helically annularly
-
- 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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/10—Stamping using yieldable or resilient pads
- B21D22/105—Stamping using yieldable or resilient pads of tubular products
-
- 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
- B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
Definitions
- the subject of the present invention is a method manufacturing a shaped metal box, including, on the one hand, a bottom and a peripheral skirt cylindrical integral with said bottom and comprising at least one expanded area and, on the other hand, a cover set on the peripheral skirt.
- metal boxes shaped consisting of a peripheral skirt comprising at least one expanded zone, with a crimped bottom at one end of the peripheral skirt and a cover crimped at the other end of said peripheral skirt.
- the cover is provided for example with a easy opening device by breaking a line of less resistance or for example of a threaded neck intended to receive a screw cap.
- peripheral skirt of this type of box metallic consists of a welded cylindrical shell longitudinally and comprising at least one zone expanded.
- the peripheral skirt is produced from a mild steel metal blank with low carbon and with elastic limit of the order of 250 MPa.
- a mild steel of this type allows local expansion of the welded cylindrical shell without great difficulty with an expansion rate calculated according to the formula: D final -D initial D initial x 100 up to 20%, D initial being the initial diameter of the welded shell and D final being the diameter of the peripheral skirt welded after expansion.
- the formation of the expanded area is generally achieved by globally expanding on the entire height of the area to be expanded, either by a pressurized air or nitrogen forming process or by a forming process using a fluid incompressible or either by an expansion process mechanical using a sector tool.
- the bottom and the peripheral skirt from material with this background are made from a cup cut from a metal blank or strip, either by stamping-re-stamping, or by stamping-ironing.
- the overall possible rate of expansion of the peripheral skirt is around 2.5%.
- the overall possible rate of expansion of the peripheral skirt is less than 1%, even for very thin, less than 0.5%.
- the advantage of such a box metallic produced by the stamping-re-stamping technique or by the stamping-ironing technique is that it allows very small thicknesses because the constituent metal is a very stiff metal, high mechanical characteristics, which induces a low weight and low material cost.
- such a box is made in two pieces, the bottom and the peripheral skirt having come from material thus conferring an advantage from the point of view aesthetic.
- the object of the present invention is to provide a method of manufacturing a metal box of shape, of the beverage can type, comprising a bottom and a peripheral skirt integrally formed with said bottom, said peripheral skirt comprising at least one zone expanded with an expansion rate of around 8% in the case of a deep drawing-deep drawing technique and of the order of 3% in the case of a stamping-ironing technique.
- this object is achieved by a method of manufacture of a shaped metal box, comprising, on the one hand, a background and a cylindrical peripheral skirt integrally formed with said bottom and comprising at least one expanded zone and, on the other hand, a cover set on the peripheral skirt, characterized in that said at least zone is produced by performing at least one step of expanding locally and successively elementary areas of the peripheral skirt starting with a first zone elementary located closest to the bottom to a last elementary area furthest from said bottom, said elementary areas partially overlapping to obtain said at least expanded zone.
- the shaped box of the drink box type, includes a bottom 1 and a peripheral skirt 2 made integrally with said background 1.
- the form box may include several expanded zones separated by intermediate zones each having a diameter less than diameter of the expanded zones.
- the external profile of the expanded 2B zone can be flat as shown in fig. 1 or curved as shown in Fig. 2.
- we form the expanded area by performing a overall expansion over the entire height of the area to be expanded, for example by a forming process with air or nitrogen under pressure or by a process of forming using an incompressible fluid or by a mechanical expansion process using a tool sectors.
- Shaped boxes have been prepared for from this steel, on the one hand, by stamping-re-stamping of a metal blank to form cylindrical blanks consisting of a bottom and a skirt device of diameter D equal to 84mm, material with said bottom and, on the other hand, by stamping-ironing a metal blank to form drafts cylindrical with diameter D equal to 66mm, corresponding to usual drink cans.
- zone 2B After formation of zone 2B by expansion overall, we see that the maximum diameter it is possible to get is equal to 86.1mm. If we increase still the diameter of the box in the expanded area, we witness a tear in the metal of the skirt wall peripheral.
- the thickness of the wall of the peripheral skirt in the center of the expanded zone 2B of diameter equal to 86.1mm is equal to 0.12mm.
- zone 2B After formation of zone 2B by expansion overall, we see that the maximum diameter it is possible to get is equal to 66.3mm, or a rate maximum expansion equal to 0.4%.
- the thickness of the wall at center of the expanded 2B area is 0.135mm.
- the method according to the invention makes it possible to realize on this type of shaped box, at least one area expanded whose expansion rate is increased so significant.
- the manufacturing process according to the invention consists in making the expanded zone 2B by carrying out minus a step of expanding locally and successively elementary zones 10a, 10b, 10c ... 10n, of the peripheral skirt 2 starting with a first elementary zone 10a located closest to the bottom 1 up to the last elementary area 10n most distant from said bottom.
- the elementary zones 10a, 10b, 10c ... 10n are partially overlap to obtain zone 2B expanded.
- the formation of the zones 10a, 10b, 10c ... 10n is made in several stages i.e. in several passes successive so as to obtain, as shown in the Figures 1 and 2, a first diameter D'1 smaller than diameter D1 and so on until the diameter is obtained final D1 of the expanded zone 2B.
- peripheral skirt 2 has at least two expanded zones, we first form the expanded area as shown above most near bottom 1, then the most distant expanded area said bottom 1.
- the formation of the elementary zones 10a, 10B, 10c ... 10n is carried out using a tool 20 which comprises at its periphery an expansion rod 21 of corresponding shape to said elementary zones 10a, 10b, 10c ... 10n.
- the diameter of the expansion rod 21 is less than or equal to 4% of the initial diameter D of the skirt device 2.
- each elementary zone 10a, 10b, 10c ... 10n is greater or equal to 2/3 of the height h of the expansion rod 21, that is to say that the advancement step of the expansion ring 21 to form each elementary zone 10a, 10b, 10c ... 10n is less than or equal to a third of the height h of said expansion ring 21.
- each area elementary 10a, 10b, 10c ... 10n is less than or equal to 1/6 of the height h of the expansion rod 21.
- the expansion ring 21 may have a section in the shape of a spherical cap, a circular section, a rectangular section or a triangular section, this section being a function of the profile of the area 2B expanded to obtain.
- the material constituting the expansion ring 21 is an elastomer.
- Tool 20 can be formed by sectors juxtaposed and radially movable to form, by through the expansion ring 21, the elementary zones 10a, 10b, 10c ... 10n and the vertical displacement not step of this tool 20 can be controlled for example by a jack 22 (Fig. 4).
- the displacements of the tool 20, that is to say expansion and advance step by step, can be controlled by a judicious programming allowing to realize a zone 2B expanded according to the desired profile.
- a counterform 25 is placed around the peripheral skirt 2.
- This counter-form 25 is for example made of elastomer and in this case it is applied directly to the outside of the skirt peripheral 2 or metal and in this case it spares with the outer face of the peripheral skirt a space free to allow the expansion of zone 2B.
- the thickness of the wall of the peripheral skirt 2 in the center of zone 2B expanded east equal to 0.12mm.
- the thickness of the wall of the peripheral skirt 2 in the center of the expanded 2B zone is equal to 0.14mm, 0.02mm more than if the expansion was performed globally over the entire height of the zone 2B to be expanded.
- the thickness of the wall of the peripheral skirt 2 in the center of zone 2B expanded east equal to 0.136mm and the height of the box has decreased by 2mm from the height of the blank, which shows although there was a metal contribution from the part from the peripheral skirt on the side of its free edge towards the area undergoing expansion.
- the manufacturing process for shaped boxes according to the invention therefore allows for boxes of shape with more marked curves and obtained from a metal blank made of steel, or aluminum or aluminum alloy.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Forging (AREA)
- Containers Having Bodies Formed In One Piece (AREA)
- Table Devices Or Equipment (AREA)
Description
- on réalise sur la jupe périphérique au moins deux zones expansées en formant d'abord la zone expansée la plus proche du fond, puis la zone expansée la plus éloignée dudit fond ;
- on réalise chaque zone élémentaire à l'aide d'un jonc d'expansion de forme correspondant à celle de ladite zone élémentaire ;
- le diamètre du jonc d'expansion est inférieur ou égal à 4% du diamètre initial de la jupe périphérique ;
- le pas de chevauchement de chaque zone élémentaire est supérieur ou égal au 2/3 de la hauteur du jonc d'expansion ;
- la profondeur de chaque zone élémentaire est inférieure ou égale à 1/6 de la hauteur du jonc d'expansion ;
- le jonc d'expansion possède une section en forme de calotte sphérique ;
- le jonc d'expansion possède une section circulaire ;
- le jonc d'expansion possède une section rectangulaire ;
- le jonc d'expansion possède une section triangulaire;
- le jonc d'expansion est en élastomère.
- la Fig. 1 est une vue en demi-coupe longitudinale d'un premier mode de réalisation d'une boíte de forme obtenue par le procédé selon l'invention,
- la Fig. 2 est une vue en demi-coupe longitudinale d'un second mode de réalisation d'une boíte de forme obtenue par le procédé selon l'invention,
- la Fig. 3 est une vue en coupe longitudinale montrant les étapes successives de formation de la zone expansée d'une boíte de forme obtenue par le procédé selon l'invention,
- la Fig. 4 est une vue schématique d'un exemple d'un outil pour la fabrication d'une boíte de forme obtenue par le procédé selon l'invention.
- une zone 2A adjacente au fond et de diamètre D,
- au moins une zone 2B expansée située au-dessus de la zone 2A, de diamètre D1,
- et une zone 2C située au-dessus de la zone 2B, de diamètre D.
- carbone : 0,008%
- manganèse : 0,139%
- phosphore : 0,07%
- soufre : 0,011%
- azote : 0,005%
- silicium < 0,002%
- cuivre : 0,015%
- nickel : 0,034%
- chrome : 0,009%
- aluminium : 0,014%.
Claims (11)
- Procédé de fabrication d'une boíte métallique de forme, comprenant, d'une part, un fond (1) et une jupe périphérique (2) cylindrique venue de matière avec ledit fond (1) et comportant au moins une zone (2B) expansée et, d'autre part, un couvercle serti sur la jupe périphérique, caractérisé en ce que l'on réalise ladite au moins zone (2B) en effectuant au moins une étape consistant à expanser localement et successivement des zones élémentaires (10a, 10b, 10c...10n) de la jupe périphérique (2) en commençant par une première zone élémentaire (10a) située le plus près du fond (1) jusqu'à une dernière zone élémentaire (10n) la plus éloignée dudit fond, lesdites zones élémentaires (10a, 10b, 10c...10n) se chevauchant partiellement pour obtenir ladite au moins zone (2B) expansée.
- Procédé selon la revendication 1, caractérisé en ce que l'on réalise sur la jupe périphérique (2) au moins deux zones expansées en formant d'abord la zone expansée la plus proche du fond, puis la zone expansée la plus éloignée dudit fond.
- Procédé selon les revendications 1 et 2, caractérisé en ce que l'on réalise chaque zone élémentaire (10a, 10b, 10c...10n) à l'aide d'un jonc d'expansion (21) de forme correspondant à celle de ladite zone élémentaire.
- Procédé selon la revendication 3, caractérisé en ce que le diamètre du jonc d'expansion (21) est inférieur ou égal à 4% du diamètre initial de la jupe périphérique (2).
- Procédé selon la revendication 3, caractérisé en ce que le pas de chevauchement de chaque zone élémentaire (10a, 10b, 10c...10n) est supérieur ou égal au 2/3 de la hauteur du jonc d'expansion (21).
- Procédé selon la revendication 3, caractérisé en ce que la profondeur de chaque zone élémentaire (10a, 10b, 10c...10n) est inférieure ou égale à 1/6 de la hauteur du jonc d'expansion (21).
- Procédé selon l'une quelconque des revendications 3 à 6, caractérisé en ce que le jonc d'expansion (21) possède une section en forme de calotte sphérique.
- Procédé selon l'une quelconque des revendications 3 à 6, caractérisé en ce que le jonc d'expansion (21) possède une section circulaire.
- Procédé selon l'une quelconque des revendications 3 à 6, caractérisé en ce que le jonc d'expansion (21) possède une section rectangulaire.
- Procédé selon l'une quelconque des revendications 3 à 6, caractérisé en ce que le jonc d'expansion (21) possède une section triangulaire.
- Procédé selon l'une quelconque des revendications 3 à 10, caractérisé en ce que le jonc d'expansion (21) est en élastomère.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9503289A FR2731928B1 (fr) | 1995-03-21 | 1995-03-21 | Procede de fabrication d'une boite metallique de forme |
FR9503289 | 1995-03-21 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0733414A1 EP0733414A1 (fr) | 1996-09-25 |
EP0733414B1 true EP0733414B1 (fr) | 1999-10-06 |
Family
ID=9477254
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96400484A Expired - Lifetime EP0733414B1 (fr) | 1995-03-21 | 1996-03-07 | Procédé de fabrication d'une boíte métallique de forme |
Country Status (8)
Country | Link |
---|---|
US (1) | US5899105A (fr) |
EP (1) | EP0733414B1 (fr) |
JP (1) | JPH08257659A (fr) |
AT (1) | ATE185295T1 (fr) |
CA (1) | CA2172227A1 (fr) |
DE (1) | DE69604520T2 (fr) |
ES (1) | ES2138298T3 (fr) |
FR (1) | FR2731928B1 (fr) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB0029459D0 (en) * | 2000-12-04 | 2001-01-17 | Corus Uk Ltd | Metal container suitable to accommodate a heating or cooling component and method for manufacturing it |
DE10261534A1 (de) * | 2002-12-23 | 2004-07-15 | Alexander Christ | Spraydose |
WO2005061149A2 (fr) * | 2003-12-22 | 2005-07-07 | Glud & Marstrand A/S | Procede et installation pour former un contenant metallique, et contenant metallique pour le stockage de produits alimentaires |
JP4616678B2 (ja) * | 2005-03-25 | 2011-01-19 | 株式会社神戸製鋼所 | 包装容器およびその製造方法 |
US7726165B2 (en) * | 2006-05-16 | 2010-06-01 | Alcoa Inc. | Manufacturing process to produce a necked container |
US7934410B2 (en) * | 2006-06-26 | 2011-05-03 | Alcoa Inc. | Expanding die and method of shaping containers |
KR20180050415A (ko) | 2010-08-20 | 2018-05-14 | 알코아 유에스에이 코포레이션 | 성형 금속 용기 및 그 제작 방법 |
US9327338B2 (en) | 2012-12-20 | 2016-05-03 | Alcoa Inc. | Knockout for use while necking a metal container, die system for necking a metal container and method of necking a metal container |
JP6594316B2 (ja) * | 2013-09-06 | 2019-10-23 | アーコニック インコーポレイテッド | アルミニウム合金製品及び該製品を製造する方法 |
CN105817512B (zh) * | 2016-05-17 | 2017-10-03 | 安徽中鼎金亚汽车管件制造有限公司 | 一种油冷器金属管加工成型设备 |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1645971A (en) * | 1922-08-25 | 1927-10-18 | Clarence H Riegel | Method of making sheet-metal barrels |
DE749792C (de) * | 1935-09-17 | 1944-12-06 | Verfahren zur Herstellung von ausgebauchten rohrfoermigen Koerpern, z.B. Metallfass-Maenteln | |
US2194385A (en) * | 1936-09-25 | 1940-03-19 | Barringer Wallis & Manners Ltd | Means for shaping tubes or containers |
GB1075856A (en) * | 1963-09-18 | 1967-07-12 | Metal Containers Ltd | An apparatus for forming a plurality of axially spaced beads in a hollow, substantially cylindrical sheet metal blank |
AU7082874A (en) * | 1973-07-06 | 1976-01-08 | Dunlop Ltd | Die presses |
US4331014A (en) * | 1980-02-29 | 1982-05-25 | Gulf & Western Manufacturing Company | Can beading apparatus |
FR2634405A1 (fr) * | 1988-07-19 | 1990-01-26 | Carnaud Sa | Procede et dispositif de fabrication d'elements tubulaires cylindriques tels que des corps de fut et elements tubulaires cylindriques obtenus selon ce procede |
-
1995
- 1995-03-21 FR FR9503289A patent/FR2731928B1/fr not_active Expired - Fee Related
-
1996
- 1996-03-07 EP EP96400484A patent/EP0733414B1/fr not_active Expired - Lifetime
- 1996-03-07 DE DE69604520T patent/DE69604520T2/de not_active Expired - Fee Related
- 1996-03-07 AT AT96400484T patent/ATE185295T1/de not_active IP Right Cessation
- 1996-03-07 ES ES96400484T patent/ES2138298T3/es not_active Expired - Lifetime
- 1996-03-19 JP JP8062874A patent/JPH08257659A/ja active Pending
- 1996-03-20 CA CA002172227A patent/CA2172227A1/fr not_active Abandoned
- 1996-03-20 US US08/618,815 patent/US5899105A/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0733414A1 (fr) | 1996-09-25 |
JPH08257659A (ja) | 1996-10-08 |
DE69604520T2 (de) | 2000-01-20 |
ES2138298T3 (es) | 2000-01-01 |
FR2731928B1 (fr) | 1997-06-13 |
US5899105A (en) | 1999-05-04 |
ATE185295T1 (de) | 1999-10-15 |
FR2731928A1 (fr) | 1996-09-27 |
CA2172227A1 (fr) | 1996-09-22 |
DE69604520D1 (de) | 1999-11-11 |
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