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EP0279269B1 - Procédé de fabrication d'une boîte étirée de tôle - Google Patents

Procédé de fabrication d'une boîte étirée de tôle Download PDF

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Publication number
EP0279269B1
EP0279269B1 EP88101419A EP88101419A EP0279269B1 EP 0279269 B1 EP0279269 B1 EP 0279269B1 EP 88101419 A EP88101419 A EP 88101419A EP 88101419 A EP88101419 A EP 88101419A EP 0279269 B1 EP0279269 B1 EP 0279269B1
Authority
EP
European Patent Office
Prior art keywords
stepped
rim
flange
ring
diameter
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
EP88101419A
Other languages
German (de)
English (en)
Other versions
EP0279269A2 (fr
EP0279269A3 (en
Inventor
Werner Erfgen
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.)
Rasselstein AG
Original Assignee
Rasselstein AG
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 Rasselstein AG filed Critical Rasselstein AG
Priority to AT88101419T priority Critical patent/ATE75975T1/de
Publication of EP0279269A2 publication Critical patent/EP0279269A2/fr
Publication of EP0279269A3 publication Critical patent/EP0279269A3/de
Application granted granted Critical
Publication of EP0279269B1 publication Critical patent/EP0279269B1/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
    • B21D51/26—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
    • B21D22/22—Deep-drawing with devices for holding the edge of the blanks

Definitions

  • the invention relates to a method for producing a deep-drawn box made of sheet metal, with a step edge adjoining the cylindrical can body by means of an optionally multi-part step edge pulling ring with a pull opening, the diameter of which corresponds approximately to the outer diameter of the can body, and with a provided at its inlet end, in Diameter larger than the step opening formed step edge recess, and by means of an optionally multi-part step edge stamp with a stamp part corresponding to the inside diameter of the can body and with a step step part with a larger diameter, firstly a cup having a flat flange is deep-drawn, the inside diameter and height of the inside diameter and the Height of the can body of the finished deep-drawn can corresponds, and then part of the flange by means of the step edge part and the step edge recess using a hold-down device acting on the flange ches is formed to the step edge while leaving a residual flange.
  • Thermoformed cans made of sheet metal with a step edge are preferably used when a full tear-open lid serves as a closure.
  • the ring-shaped cover edge connected to the can by a fold remains on the can.
  • the opening diameter of the lid edge would then be smaller than the inside diameter of the can, which leads to difficulties when emptying pasty filling goods in particular.
  • the deep-drawn cans made of aluminum sheet with a step edge are produced in the above-mentioned known method in one stroke, the sheet running freely over the step edge recess of the step edge pulling ring during the deep-drawing of the can body.
  • sheet steel especially those with a small thickness and high hardness, e.g. Double-reduced steel sheet, which was cold-rolled after recrystallization annealing with a high degree of re-rolling of over 15%, wrinkles appear on the deep-drawn can.
  • the invention is therefore based on the object of demonstrating a method for producing a deep-drawn tin from sheet metal, with a step edge of the type mentioned at the top adjoining the cylindrical can body, with which it is possible to make such deep-drawn cans from bare or painted steel sheets, in particular those with smaller sizes Manufacture thickness and greater hardness, especially from double-reduced steel sheet, without wrinkles.
  • the bowl when deep-drawing cans made of sheet steel, the bowl is first deep-drawn in a preliminary stage using a drawing ring without a step edge recess in a stop train and, if appropriate, one or more further moves, and then this preferred bowl is surrounded and in by the step edge pulling ring a further step by means of the step edge part and the step edge recess a part of the flange is formed into the step edge.
  • the bowl in the preliminary stage can first be drawn out in one or more deep-drawing tools.
  • This advanced cup is then brought into a tool with a step edge drawing ring and in this tool a part of the flange is then formed into the step edge in a further step.
  • the step edge drawing ring therefore, only part of the flange is deformed into the step edge.
  • both stages can also be carried out in a single, multi-stage tool, however, the same principle is used, in the preliminary stage the bowl, consisting of the can body and flange, is deep-drawn in a tool part (drawing ring) that has no step edge.
  • a second tool part which contains the step edge recess, is covered by the first tool part and is therefore ineffective. Only when the bowl production is completed in the preliminary stage is the first tool part displaced, for example, against the force of a spring and the step edge recess of the second tool part is released, as a result of which a part of the flange can then be formed into the step edge in the further step.
  • a cup N is first deep-drawn in a conventional manner from a sheet steel plate of small thickness s of, for example, 0.17 mm and high hardness of approximately 60 to 70 HR30T, which then has a flat flange 2 on its can body 1.
  • This bowl can be produced in one stop train and, if necessary, one or more further trains.
  • the inside diameter D of the bowl N and its height H should correspond to the inside diameter D and the height H of the deep-drawing box T shown on the right in FIG.
  • the deep-drawn cup N is then turned into the finished deep-drawn box using the tool shown in FIG T reshaped.
  • This tool has a step edge drawing ring 3 with a drawing opening 4, the diameter D1 of which, taking into account a sufficient drawing gap, corresponds approximately to the outside diameter of the can body 1.
  • a step edge recess 5 the diameter D2 of which is larger than the diameter D1 of the drawing opening.
  • the tool consists of a step edge stamp 6 with a first stamp part 7, whose diameter D3 corresponds approximately to the inside diameter D of the can body 1 and with a step edge part 8 which is larger in diameter D4.
  • the tool has a hold-down device 10 loaded by a relatively weak spring 9 on. The force of the spring 9 is approximately 700 to 800 N with a can diameter D of 66 mm.
  • the bowl N produced in a preliminary stage is introduced into the step edge drawing ring 3 of the tool described, as is shown on the left in FIG. 1.
  • the flat flange 2 is clamped between the step edge drawing ring 3 and the hold-down device 10.
  • the step edge stamp 6 which first enters the can body 1 of the bowl N with its stamp part 7, part of the flange 2 is deformed by the deepening of the step edge part 8 by deep drawing to the desired step edge 11 on the finished deep-drawing box T, as shown in FIG. 1 is shown on the right.
  • a small remaining flange 2a is left at the outer end of the step edge 11, which later takes into account the manufacture of the can board, taking into account a trimming allowance.
  • the diameter of the can body 1 and the height H of the can body 1 are not changed by the stamp part 7 when the step edge is formed, since this stamp part 7 has an axial length which is substantially smaller than the height H of the can body 1.
  • the remaining flange 2a can then be cut so that an annular can rim is formed, the radial width of which is the same across its entire circumference is.
  • the step edge production and trimming can, however, also be carried out in one tool according to FIG. 2 or 3.
  • a tool has, according to FIG. 2, a step edge pulling ring 3 ⁇ which is surrounded concentrically by a counter-holding ring 13 supported by a spring 12.
  • the hold-down ring 10 ⁇ encloses a pressure ring 14, on which the spring 9 acts.
  • an annular trimming edge 15 is also provided, which cooperates with an annular trimming edge 16 on the hold-down ring 10 ⁇ .
  • the step edge pull ring 3 ⁇ and the step edge stamp 6 are designed in the same way as the step edge pull ring 3 and the step edge stamp 6 in the exemplary embodiment shown in FIG.
  • the flange 2 of the cup between the end faces of step edge pull ring 3 ⁇ , counterholder 13, hold-down 10 ⁇ and pressure ring 14 is clamped slightly resiliently.
  • the step edge stamp 6 then forms part of the flange 2 into the step edge 11.
  • the step edge forming is immediately followed by a last phase in which a part connected to the step edge stamp 6 is formed
  • Flange 17 presses directly on the hold-down device 10 ⁇ , as shown on the right in FIG.
  • the remaining flange 2a is trimmed under the interaction of the two cutting edges 15, 16, the counter-holder 13 evading against the force of the spring 12.
  • the step edge pull ring 3 ' is likewise surrounded concentrically by a counter-holder 18, in which case an annular trimming edge 19 is arranged on the counter-holder 18.
  • the step rim pull ring 3 ⁇ is supported by a spring 20.
  • a concentric trimming ring 21 with an annular cutting edge 22 is provided in the hold-down ring 10 ⁇ .
  • the bowl N is produced, the step edge 11 is subsequently formed and the remaining flange 2a is cut in a single tool.
  • the step rim pull ring 3 ′′′ in this case consists of three rings which are concentric with one another, namely the inner drawing ring 26, the step edge ring 27 and the counter-holder 28.
  • the counter-holder 28 is provided with an annular trimming edge.
  • the drawing ring 26 is supported by the spring 30 and the step edge ring 27 by the spring 31.
  • the hold-down ring 10 ′′′ surrounds an annular step edge stamp 32.
  • This step edge stamp 32 has an annular cutting edge 33.
  • the step edge stamp 32 surrounds the deep-drawing stamp 36, which has a shoulder 37. Otherwise, parts of the same function are designated by the same reference numerals as in the embodiment shown in FIG. 1.
  • a flat sheet metal plate of a suitable size is placed between the end faces of the drawing ring, step edge ring and counter-holder 28 on the one hand and hold-down device 10 ′′′ and step edge stamp 32 on the other hand. Under the action of the springs 34 and the pressure pins 35, this disk is clamped between the end faces of the components mentioned.
  • the bowl with the initially flat flange is first formed in a stop stroke (or further move) by the deep-drawing die 36 in a first phase. As soon as the bowl has reached the desired height, the shoulder 37 comes to rest against the step edge stamp 32. According to FIG. 5, part of the flange 2 is now formed into the step edge 11.
  • the drawing ring deflects in the axial direction against the action of the spring 30.
  • the remaining flange 2a according to FIG. 4 is trimmed in a third phase under the action of the two cutting edges 29 and 33.
  • the step rim ring 27 diverts in the axial direction against the action of the spring 31.

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)
  • Rigid Containers With Two Or More Constituent Elements (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Claims (4)

  1. Procédé pour la fabrication d'une boîte en tôle emboutie, possédant un bord étagé (11) se raccordant en haut au corps de boîte cylindrique, au moyen d'une matrice annulaire d'emboutissage du bord étagé (3), éventuellement en plusieurs pièces, présentant une ouverture d'emboutissage dont le diamètre (D1) correspond à peu près au diamètre extérieur du corps de boîte, ainsi qu'un évidement pour la réception du bord étagé, prévu à son extrémité d'entrée et dont le diamètre est plus grand que celui de l'ouverture d'emboutissage, et au moyen d'un poinçon formateur de bord étagé (6), éventuellement en plusieurs pièces, comportant une partie de poinçon correspondant au diamètre intérieur (D) du corps de boîte et une partie (8) de plus grand diamètre pour former le bord étagé, procédé selon lequel on produit d'abord, par emboutissage profond, un godet (N) comportant un collet plan (2), dont le diamètre intérieur et la hauteur correspondent au diamètre intérieur et à la hauteur du corps de la boîte emboutie finie, et selon lequel, ensuite, on transforme une partie du collet (2) en bord étagé au moyen de la partie de poinçon pour former le bord étagé et de l'évidement prévu dans la matrice pour la réception du bord étagé, en utilisant un serre-flan (10) agissant sur le collet (2) et en laissant subsister un collet résiduel, caractérisé en ce que, lors de l'emboutissage profond de boîtes en tôle d'acier, on emboutit d'abord le godet (N) dans une étape préalable, en utilisant une matrice annulaire d'emboutissage sans évidement pour la réception d'un bord étagé, dans un emboutissage à butée et, éventuellement, une ou plusieurs passes d'emboutissage consécutives, et que l'on entoure ensuite ce godet (N) pré-embouti par la matrice annulaire d'emboutissage du bord étagé et, dans une étape supplémentaire, on transforme une partie du collet (2) en bord étagé (11) au moyen de la partie de poinçon pour former le bord étagé et de l'évidement prévu dans la matrice pour la réception du bord étagé.
  2. Procédé selon la revendication 1, caractérisé en ce qu'il comprend ensuite le découpage circulaire du collet résiduel (2a).
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la fabrication du godet et le façonnage subséquent du bord étagé (11) s'effectuent dans un seul outillage.
  4. Procédé selon la revendication 1, 2 ou 3, caractérisé en ce que le découpage du collet résiduel s'effectue, dans une dernière phase faisant immédiatement suite au façonnage du bord étagé, par des outils annulaires de découpage (10') prévus sur la matrice annulaire d'emboutissage du bord étagé et sur le serreflan (10) ou le poinçon formateur de bord étagé.
EP88101419A 1987-02-17 1988-02-02 Procédé de fabrication d'une boîte étirée de tôle Expired - Lifetime EP0279269B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88101419T ATE75975T1 (de) 1987-02-17 1988-02-02 Verfahren zur herstellung einer tiefziehdose aus blech.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3704895 1987-02-17
DE19873704895 DE3704895A1 (de) 1987-02-17 1987-02-17 Verfahren zur herstellung einer tiefziehdose aus blech

Publications (3)

Publication Number Publication Date
EP0279269A2 EP0279269A2 (fr) 1988-08-24
EP0279269A3 EP0279269A3 (en) 1990-05-09
EP0279269B1 true EP0279269B1 (fr) 1992-05-13

Family

ID=6321109

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88101419A Expired - Lifetime EP0279269B1 (fr) 1987-02-17 1988-02-02 Procédé de fabrication d'une boîte étirée de tôle

Country Status (5)

Country Link
EP (1) EP0279269B1 (fr)
AT (1) ATE75975T1 (fr)
DE (2) DE3704895A1 (fr)
ES (1) ES2031935T3 (fr)
GR (1) GR3005012T3 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5442111A (en) * 1991-05-24 1995-08-15 Warner-Lambert Company 3,5-di-tetriary-4-butyl-4-hydroxyphenyloxy- or tioalkylene N-hydroxyamides, N-hydroxythioamides, N-hydroxyureas, and N-hydroxythioureas as 5-lipoxygenase inhibitors
FR2702401B1 (fr) * 1993-03-09 1995-06-16 Lorraine Laminage Procede et dispositif d'emboutissage de flans metalliques pour la realisation de pieces dite a embouti profond.
EP1663541B1 (fr) 2003-09-04 2010-05-05 Maiko Engineering GmbH Procede de fabrication d'un objet en forme de cuvette
DE102007054825A1 (de) * 2007-11-16 2009-05-20 Audi Ag Werkzeug zum Beschneiden und Abstellen von flächigen Werkstücken sowie Schneide- und Abstellverfahren
DE102011053084B4 (de) * 2011-08-29 2013-07-11 Schuler Pressen Gmbh Vorrichtung und Verfahren zur Herstellung von Dosenkörpern mit Schneideinrichtung
DE102017117238B4 (de) * 2017-07-31 2022-02-17 Aweba Werkzeugbau Gmbh Aue Transferwerkzeug für mehrreihige Rondenbearbeitungen

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE480594C (de) * 1929-08-06 Franz Beer Dipl Ing Vorrichtung fuer Ziehpressen
FR2096812B2 (fr) * 1970-07-01 1973-06-08 Alurec
AT316270B (de) * 1972-09-22 1974-07-10 Verzinkerei Zug Ag Tiefziehverfahren und Tiefziehwerkzeug zur Durchführung des Verfahrens
US3855862A (en) * 1973-04-23 1974-12-24 Continental Can Co Draw and wall iron process for metal cans
NL181914C (nl) * 1977-07-05 1900-01-01 Toyo Seikan Kaisha Ltd Inrichting voor het vervaardigen van getrokken voorwerpen.
DE3105538A1 (de) * 1980-03-13 1982-08-26 Sexton Can Co., Inc., 02149 Everett, Mass. Metallbehaelter

Also Published As

Publication number Publication date
DE3704895C2 (fr) 1988-11-17
DE3870907D1 (de) 1992-06-17
GR3005012T3 (fr) 1993-05-24
DE3704895A1 (de) 1988-08-25
EP0279269A2 (fr) 1988-08-24
ATE75975T1 (de) 1992-05-15
EP0279269A3 (en) 1990-05-09
ES2031935T3 (es) 1993-01-01

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