EP3096897B1 - Verfahren zur herstellung einer getränkedose, einer flaschendose oder einer aerosoldose aus aluminiumlegierung - Google Patents

Verfahren zur herstellung einer getränkedose, einer flaschendose oder einer aerosoldose aus aluminiumlegierung Download PDF

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Publication number
EP3096897B1
EP3096897B1 EP15705040.2A EP15705040A EP3096897B1 EP 3096897 B1 EP3096897 B1 EP 3096897B1 EP 15705040 A EP15705040 A EP 15705040A EP 3096897 B1 EP3096897 B1 EP 3096897B1
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EP
European Patent Office
Prior art keywords
blank
metal
beverage
profile
rolling direction
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.)
Active
Application number
EP15705040.2A
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English (en)
French (fr)
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EP3096897A1 (de
Inventor
Hervé STOPPIGLIA
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.)
Constellium Neuf Brisach SAS
Original Assignee
Constellium Neuf Brisach SAS
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Application filed by Constellium Neuf Brisach SAS filed Critical Constellium Neuf Brisach SAS
Priority to PL15705040T priority Critical patent/PL3096897T3/pl
Publication of EP3096897A1 publication Critical patent/EP3096897A1/de
Application granted granted Critical
Publication of EP3096897B1 publication Critical patent/EP3096897B1/de
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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
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • 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
    • B21D22/20—Deep-drawing
    • 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
    • B21D28/00—Shaping by press-cutting; Perforating
    • B21D28/02—Punching blanks or articles with or without obtaining scrap; Notching
    • B21D28/06—Making more than one part out of the same blank; Scrapless working

Definitions

  • the invention relates to the field of aluminum alloy beverage cans, also known to those skilled in the art under the name of “cans” or “beverage cans”, but also metal bottles or “bottle-cans” and aerosol cans, manufactured by stamping-stretching, that is to say according to a process including in particular these two basic steps.
  • the invention relates more particularly to a stamping process optimized for this type of application and having in particular the advantage of avoiding the so-called “pinched horns” phenomenon, well known to those skilled in the art, with the risk of breakage. that it involves during subsequent stretching.
  • Aluminum alloys are used more and more in the manufacture of beverage cans, also known under the name of “cans” or “beverage cans”, but also of metal bottles or “bottle-cans” and boxes of. aerosol, because of their very good aesthetic appearance, in particular compared to plastics and steels, their ability to be recycled and their good resistance to corrosion. All the aluminum alloys referred to in what follows are designated, unless otherwise specified, according to the designations defined by the “Aluminum Association” in the “Registration Record Series” that it publishes regularly.
  • Beverage cans or cans, also known to those skilled in the art under the name of “cans” or “beverage cans”, are usually manufactured by stamping-drawing from alloy sheets of the type 3104 in the state. metallurgical H19.
  • the sheet undergoes a first operation of cutting into blanks and stamping into cups or "cups”; more precisely, during this step, the sheet coil feeds a press, also called a “cupper”, which cuts discs called blanks and performs a first stamping operation to produce cups also known as “cups”. ".
  • a press also called a “cupper”
  • the cups are then conveyed to a second press or "bodymaker” where they undergo at least a second stamping and several successive drawing operations; these consist in passing the stamped blank through drawing rings in order to lengthen the metal and thin it. In this way, boxes are gradually obtained whose walls are thinner than the bottom. These boxes are then processed in a machine which gives them a rotary motion while a shear cuts them to the desired height.
  • beverage cans are then conveyed to a shrinking and flanging station (or edging) also known as the “necker flanger” where the upper part of the preform undergoes several successive diameter shrinkages and edging intended for the. subsequent fitting of the cover.
  • a shrinking and flanging station also known as the “necker flanger” where the upper part of the preform undergoes several successive diameter shrinkages and edging intended for the. subsequent fitting of the cover.
  • Metal bottles and aerosol cans or aerosol cans, made of aluminum alloy, are traditionally manufactured by impact spinning, from pins resulting from casting on a wheel.
  • Patent applications testify JP 7060386 by Toyo Rikagaku Kenkyusho from 1993 and EP 0740971 de Hoogovens under priority of 1995.
  • These bottles are not, however, a one-piece structure. Indeed, the vertical walls and neck of the bottle are made from the bottom of the preform and a cover is crimped on the top of the preform.
  • This type of solution is also used in series, particularly in the United States. However, it has the drawback of non-optimum formability with respect to stamping, and also, moreover, of shrinking or “necking”.
  • the shape of the developed perimeter known to those skilled in the art under the name of “horn profile”, is not favorable. This is in fact a profile with six lugs, two of which are positioned respectively at 0 and 180 ° from the rolling direction and four at 45 ° on either side of said direction, in accordance with the figure 1 .
  • the design and use in production of non-circular blanks for the manufacture of beverage cans form part of the state of the art.
  • the objective is to compensate for the anisotropy of the metal by varying the diameter of the blank according to its orientation with respect to the rolling direction. This technology is advantageous because it increases the ratio between the quantity of metal actually used in the beverage can and the quantity of metal engaged on the flat metal, or strip.
  • the invention aims to resolve these difficulties by providing a non-circular blank eliminating any risk of pinched horn (s) during the stamping of the cups or "cups".
  • the figure 1 represents the "horn profile", that is to say the shape of the perimeter developed from the top of the "cups" at the end of the first stamping, with, on the ordinate, the ratio of the height of the horn to the average height of the cup and, on the abscissa, the angle ⁇ with respect to the rolling direction.
  • This is in fact a profile with six lugs, two of which are positioned respectively at 0 and 180 ° from the rolling direction and four at 45 ° on either side of said direction.
  • the figure 2 represents the starting strip of metal A as well as its virtual division into regular hexagons B from which the blanks C.
  • the rolling direction is marked D while the strip width is marked E.
  • the figure 3 provides the same indications, with, in addition, the areas of the hexagon left free at F, G, H and I.
  • the figure 4 represents a curve of the flat outer profile of the uniform circular blank with a radius of 69.3 mm (solid line) and non-circular optimized to take account of the anisotropic behavior of the metal according to the prior art (curve in dotted lines).
  • the radius R in mm On the ordinate, the radius R in mm and, on the abscissa, the angle ⁇ formed with the direction of rolling.
  • the figure 5 represents a curve (continuous with the addition of cross patterns) of the flat outer profile of the non-circular blank according to the invention, designed by adding to the previous variant four horns with a relative height equal to 0.35% of the radius of said variant.
  • the constant radius variant is always represented there in a solid line and the blank of the prior art said to be optimal in dotted lines as in figure 4 .
  • the figure 6 represents a curve (continuous with the addition of cross patterns) of the flat outer profile of the non-circular blank according to the invention, designed by adding to the “optimized” variant of the figure 4 , four horns with a relative height equal to 0.57% of the radius of said variant.
  • the constant radius variant is always represented there in a solid line and the blank of the prior art said to be optimal in dotted lines as in figure 5 .
  • the figure 7 represents the profile curves of the cups obtained from the 4 variants of blank, with, on the ordinate the height H of the cup at the corresponding point with a step of 0.1 mm and on the abscissa the angle ⁇ formed with the rolling direction: On the curve full, the profile of the cups obtained with a uniform circular blank with a radius equal to 69.3 mm, In dotted curve, the profile of the cups with a non-circular blank of the so-called “optimal” prior art, On a curve with a cross, the profile of the cups with a non-circular blank optimized according to the invention with 4 horns at 0.35%, Curved with circles, the profile of the cups with a non-circular blank optimized according to the invention with 4 horns at 0.57%.
  • the invention consists in a judicious choice of the design of the non-circular blank, optimized in two stages:
  • a first step of compensating for the anisotropy according to the prior art It consists in compensating for the effect of the anisotropy of the metal by varying the diameter of the blank as a function of its orientation with respect to the rolling direction, typically, and schematically, by increasing the radius of the blank in the directions corresponding to hollows on the profile of the cup, due to the anisotropy of behavior of the metal during the first stamping step, and reducing it in the directions corresponding to horns or bumps on said profile.
  • the typical width at mid-height is equal to the length of the segment perpendicular to the radius joining the center of the blank and the top of the horn, and delimited by the intersection of the horn with a corner sector of approximately 30 ° from the center of the blank.
  • An alloy plate of the 3104 type was cast by continuous vertical casting. It was scalped and then homogenized at a temperature of approximately 580 ° C. for approximately 3 hours before undergoing hot rolling and then cold rolling to the final thickness of 0.264 mm is in the metallurgical state H19. "Cups" were made from this sheet with a diameter of the stamping punch of the cups of 88.9 mm from flat profile blanks according to the variants below, all cut by laser:
  • Variant 1 corresponds to a constant blank radius of 69.3 mm as shown in solid lines on the figure 4 or a circular blank without any optimization.
  • Variant 2 corresponds to a so-called “optimal” blank, that is to say “perfectly” compensating for the anisotropy of behavior of the metal, according to a method known to those skilled in the art, such as that mentioned above reported in item “Convolute Cut-Edge Design for an Earless Cup in Cup Drawing” by RE Dick, JW Yoon and F. Barlat, CP778 Volume A, Numishet 2005 . She is represented on this same figure 4 by a dotted line curve.
  • Variant 3 according to the invention :
  • Variant 3 corresponds to a blank according to the invention, designed by adding to the preceding variant 2 four horns at 35 °, 145 °, 215 ° and 325 °, with a relative height equal to 0.35% of the radius of said variant 2 and a width at mid-height corresponding to a sector of 30 °. She is pictured on the figure 5 by a curve in a continuous line supplemented with cross patterns.
  • Variant 1 is still shown there in a solid line and the blank of the prior art said to be optimal in dotted lines as in figure 4 .
  • Variant 4 according to the invention :
  • Variant 4 corresponds to a blank according to the invention, designed by adding to the preceding variant 2 four horns at 35 °, 145 °, 215 ° and 325 °, with a relative height equal to 0.57% of the radius of said variant 2 and a width at mid-height corresponding to a sector of 30 °. She is pictured on the figure 6 by a curve in a continuous line supplemented with cross patterns. Variant 1 is still shown there in a solid line and the blank of the prior art said to be optimal in dotted lines as in figure 4 .
  • the so-called “optimal” prior art blank compensates for the anisotropy of the metal because the amplitude of the profile curve goes from approximately 0.9 mm to less than 0.2 mm.
  • the 4 additional horns are clearly visible on the profile curves with crosses and with circles. The difference in height of the additional horns is correctly related to the difference in the initial horn heights.
  • the height of the artificial horns in the case of the profile of horns at 0.57% (curve with circles), largely exceeds the height of the horns linked to the anisotropy (solid curve) and also meets it in the case of horns.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Containers And Packaging Bodies Having A Special Means To Remove Contents (AREA)
  • Rigid Containers With Two Or More Constituent Elements (AREA)

Claims (2)

  1. Verfahren zur Herstellung einer Getränkedose, einer Flasche oder eines Aerosolbehälters aus Aluminiumlegierung aus einem nicht kreisförmigen Zuschnitt durch Streckziehen und anschließende Querschnittsverminderung und/oder Biegen, bei dem
    - das Metallband, aus dem der Zuschnitt jeweils entnommen wird, virtuell in identische regelmäßige Sechsecke unterteilt wird, von denen zwei gegenüberliegende Seiten im Wesentlichen senkrecht zur Walzrichtung des Bandes stehen und die ein ebenes kompaktes hexagonales System bilden
    - der Umfang des Zuschnitts durch Anpassung aus einem konzentrischen Kreis mit einem kleineren Radius als der des eingeschriebenen Kreises des entsprechenden Sechsecks berechnet wird, um beim Tiefziehen die Anisotropie des Verhaltens des Metalls auszugleichen, indem der Durchmesser des Zuschnitts in Abhängigkeit von seiner Orientierung in Bezug auf die Walzrichtung verändert wird, indem der Radius des Zuschnitts entlang der Richtungen, die den Vertiefungen auf dem Profil der Schale aufgrund der Anisotropie des Verhaltens des Metalls während des ersten Tiefziehschritts entsprechen, vergrößert und entlang der Richtungen, die Hörnern oder Beulen auf dem Profil entsprechen, verkleinert wird,
    und dadurch gekennzeichnet, dass
    - über den genannten Umfang hinaus und ausgehend von diesem Umfang in den freigelassenen Zonen des Sechsecks mindestens vier Hörner hinzugefügt werden, deren Hauptachse mit der Walzrichtung einen Winkel von im Wesentlichen 35°, 145°, 215° und 325° bilden, von denen jedes eine relative Höhe von 0,3 bis 0,8 % in Bezug auf den konzentrischen Ausgangskreis und eine maximale Breite unter Berücksichtigung des vorhandenen Platzes aufweist, oder die typischerweise auf halber Höhe des Horns einem minimalen Winkelsektor von im Wesentlichen 25° mit dem Mittelpunkt des Zuschnitts als Scheitelpunkt entsprechen.
  2. Tiefziehzuschnitt für eine Getränkedose, eine Metallflasche oder einen Aerosolbehälter, dadurch gekennzeichnet, dass er mit einem Verfahren nach Anspruch 1 hergestellt ist, d. h. dass er mindestens vier über den genannten Umfang hinaus und ausgehend von diesem Umfang in den freigelassenen Zonen des Sechsecks hinzugefügte Hörner aufweist, deren Hauptachse mit der Walzrichtung einen Winkel von im Wesentlichen 35°, 145°, 215° und 325° bilden, von denen jedes eine relative Höhe von 0,3 bis 0,8 % in Bezug auf den konzentrischen Ausgangskreis und eine maximale Breite unter Berücksichtigung des vorhandenen Platzes aufweist, oder die typischerweise auf halber Höhe des Horns einem minimalen Winkelsektor von im Wesentlichen 25° mit dem Mittelpunkt des Zuschnitts als Scheitelpunkt entsprechen.
EP15705040.2A 2014-01-20 2015-01-15 Verfahren zur herstellung einer getränkedose, einer flaschendose oder einer aerosoldose aus aluminiumlegierung Active EP3096897B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL15705040T PL3096897T3 (pl) 2014-01-20 2015-01-15 Sposób produkcji puszki do napojów, butelki blaszanej lub puszki aerozolowej ze stopu aluminiowego

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1400104A FR3016538B1 (fr) 2014-01-20 2014-01-20 Procede de fabrication d'une boite-boisson, bouteille metallique ou boitier d'aerosol en alliage d'aluminium
PCT/FR2015/000017 WO2015107284A1 (fr) 2014-01-20 2015-01-15 Procédé de fabrication d'une boîte-boisson, bouteille métallique ou boîtier d'aérosol en alliage d'aluminium

Publications (2)

Publication Number Publication Date
EP3096897A1 EP3096897A1 (de) 2016-11-30
EP3096897B1 true EP3096897B1 (de) 2020-07-22

Family

ID=50483088

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15705040.2A Active EP3096897B1 (de) 2014-01-20 2015-01-15 Verfahren zur herstellung einer getränkedose, einer flaschendose oder einer aerosoldose aus aluminiumlegierung

Country Status (9)

Country Link
US (1) US10675669B2 (de)
EP (1) EP3096897B1 (de)
CN (1) CN105916609B (de)
BR (1) BR112016016067B1 (de)
ES (1) ES2818082T3 (de)
FR (1) FR3016538B1 (de)
PL (1) PL3096897T3 (de)
RU (1) RU2684986C2 (de)
WO (1) WO2015107284A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112024975A (zh) * 2020-08-26 2020-12-04 云嘉集团有限公司 一种冷冲压拉伸件料片的加工方法

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Also Published As

Publication number Publication date
WO2015107284A1 (fr) 2015-07-23
US10675669B2 (en) 2020-06-09
BR112016016067A2 (de) 2017-08-08
CN105916609B (zh) 2017-12-22
ES2818082T3 (es) 2021-04-09
FR3016538A1 (fr) 2015-07-24
BR112016016067B1 (pt) 2022-11-08
RU2016133985A3 (de) 2018-08-01
CN105916609A (zh) 2016-08-31
RU2684986C2 (ru) 2019-04-16
RU2016133985A (ru) 2018-02-22
FR3016538B1 (fr) 2016-07-15
PL3096897T3 (pl) 2021-02-08
US20160332208A1 (en) 2016-11-17
EP3096897A1 (de) 2016-11-30

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