EP0035718B1 - Procédé pour la fabrication d'une feuille ou bande en aluminium ou alliage d'aluminium présentant une bonne aptitude à l'emboutissage profond - Google Patents

Procédé pour la fabrication d'une feuille ou bande en aluminium ou alliage d'aluminium présentant une bonne aptitude à l'emboutissage profond Download PDF

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Publication number
EP0035718B1
EP0035718B1 EP81101433A EP81101433A EP0035718B1 EP 0035718 B1 EP0035718 B1 EP 0035718B1 EP 81101433 A EP81101433 A EP 81101433A EP 81101433 A EP81101433 A EP 81101433A EP 0035718 B1 EP0035718 B1 EP 0035718B1
Authority
EP
European Patent Office
Prior art keywords
strip
rolling
micro
sheet
deep
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
Application number
EP81101433A
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German (de)
English (en)
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EP0035718A1 (fr
Inventor
Friedrich Dr. Ing. Fischer
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.)
Austria Metall AG
Original Assignee
Austria Metall AG
Vereinigte Metallwerke Ranshoffen Berndorf 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.)
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Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6096480&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0035718(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Austria Metall AG, Vereinigte Metallwerke Ranshoffen Berndorf AG filed Critical Austria Metall AG
Priority to AT81101433T priority Critical patent/ATE8853T1/de
Publication of EP0035718A1 publication Critical patent/EP0035718A1/fr
Application granted granted Critical
Publication of EP0035718B1 publication Critical patent/EP0035718B1/fr
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon

Definitions

  • the invention relates to a method for producing a deep-drawable sheet, strip or the like from aluminum or aluminum alloys.
  • lubricants also does not achieve the desired success if conventional smooth or directional surface structures are used, because in this case the lubricant film is squeezed away by the hold-down device and the friction at this point of extreme stress quickly assumes an impermissible level, which leads to the tear of the drawn part .
  • An improvement in the friction conditions in the drawing gap and in the hold-down device is achieved if, instead of the usual blank, matt-rolled, brushed, ground or even deep-drawn foil-coated board surface, a roughened surface is used, which enables a high lubricant pressure to be built up on the tool-board contact surface.
  • the invention is therefore based on the object of forming the surface of an aluminum sheet or strip in such a way that improved deep-drawing results are thereby achieved.
  • This object is achieved according to the invention by a method for producing a sheet, strip or the like made of aluminum or aluminum alloys that can be deep-drawn and has fine micro-roughness which is as far as possible non-oriented of the sheet, strip or the like. of about 3% and the roll forming is followed by a soft annealing.
  • a method has proven to be particularly advantageous in which, when roll profiling, a roller whose surface is blasted with cast steel with a hardness of HRC 62-65 and grits No. to No. 4 at a centrifugal speed of 50-150 m / s is irradiated, is rolled.
  • the strips are expediently passed through a strip drawing furnace at a speed between 30 and 90 seconds, the final temperature of the strip being 400 to 450 ° C.
  • micro-roughness of the roll used in roll profiling can also be generated by chemical, mechanical or thermal treatment.
  • an aluminum sheet produced according to the invention with such a micro surface during deep drawing creates very favorable frictional relationships between the hold-down device and the sheet, which enables a qualified flow of the material into the die and thus largely prevents the formation of cracks and wrinkles .
  • Such a micro-surface proves to be particularly advantageous in connection with a lubricant, because the pointed, unoriented profiles of the roughness in connection with the hold-down device seal the lubricant and prevent it from being pushed away.
  • micro-profiles 2 which are essentially evenly distributed, rise on the surface. They have the shape of slender cones with the tips 3.
  • the depressions 4 between the profiles are appropriately flattened or rounded in order to avoid notching effects.
  • the micro surface is covered with a lubricant 5.
  • the tips of the profiles 2 are flattened by a hold-down device 7 at 8, the recesses 4 being sealed so that the lubricant filling that is absorbed remains enclosed.
  • the invention proposes a re-rolling, the rolling surface of which is sandblasted so that a largely uniform surface is formed which, due to a slight flattening of the blasted profiles on the roller, does not result in any sharp notches in the profile base of the sheet thus rolled .
  • the roll pass must be carried out before soft or solution annealing, depending on the alloy used.
  • Subsequent annealing softens the profiles hardened during re-rolling, making it easier to flatten the tips with the hold-down device.
  • the annealing therefore meets the requirement for the softest possible characteristic of the micro-profile.
  • the annealing should be such that its effect is aimed only at influencing the micro-profile and the mechanical-technological values of the base material are not undesirably influenced.
  • the rolls to be used for re-rolling the sheets are expediently sandblasted in a cabin.
  • the roller hardness should be at least 95 Shore-C.
  • a jet of cast steel with a hardness of HRC 62 to 65 and grits No. 2 to No. 4 with a maximum grain size of 0.5 to 1.5 mm and screened fine particles can be used.
  • the spin speeds should be 50 to 150 m / s. Irradiation takes place with the roller rotating and the beam being axially displaced.
  • the soft annealing is expediently carried out in a continuous strip furnace with or without protective gas.
  • the throughput time through the furnace should be between 30 and 90 seconds, preferably 50 to 60 seconds, and the final temperature of the belt should be 400 to 550 ° C, preferably 490 to 520 ° C.
  • the invention is not limited to the embodiment shown in FIGS. 1 and 2. Not all micro elevations need to have a uniform cone shape. The elevations can also differ in height, just as the cross-sectional areas parallel to the height or base axis can also be quite varied. On the other hand, it is essential that the micro-profiles are in an arrangement that is not aligned but offset against one another in the finest possible distribution tion are formed on the sheet surface. This ensures that the material flows sufficiently and evenly into the die or the die and, when using a lubricant, largely prevents it from being pushed away.

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  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Metal Rolling (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Continuous Casting (AREA)
  • Coating With Molten Metal (AREA)

Claims (5)

1. Procédé pour la fabrication d'une feuille, bande ou èlèment analogue en aluminium ou en des alliages d'aluminium présentant une bonne aptitude à l'emboutissage en profondeur et comportant des microrugosités fines le plus possible non orientées, par profilage au laminoir à l'aide d'un cylindre dont la surface possède des microrugosités présentant le moins possible une orientation préférentielle, procédé dans lequel la feuille, bande ou élément analogue subit une diminution d'épaisseur d'environ 3% lors du profilage au laminoir et ce profilage au laminoir est suivi d'un recuit.
2. Procédé selon la revendication 1, dans lequel le profilage au laminoir a lieu à l'aide d'un cylindre dont la surface est revêtue par projection d'une mitraille de fonte d'acier présentant une dureté HRC de 62 à 65 et des granulométries comprises entre le numéro 2 et le numéro 4, avec une vitesse de projection comprise entre 50 et 150 m/s.
3. Procédé selon la revendication 1, dans lequel, en vue du recuit, les bandes sont acheminées à travers un four de passage avec une vitesse comprise entre 30 et 90 secondes, et dans lequel la température finale de la bande est comprise entre 400 et 550° C.
4. Procédé selon la revendication 1, dans lequel seules les pointes ou crêtes des microrugosités de la feuille, bande ou élément analogue subissent un recuit après le profilage au laminoir.
5. Procédé selon la revendication 1, dans lequel la microrugosité du cylindre utilisé lors du profilage au laminoir est engendrée par un traitement chimique, mécanique ou thermique.
EP81101433A 1980-03-06 1981-02-27 Procédé pour la fabrication d'une feuille ou bande en aluminium ou alliage d'aluminium présentant une bonne aptitude à l'emboutissage profond Expired EP0035718B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81101433T ATE8853T1 (de) 1980-03-06 1981-02-27 Verfahren zur herstellung eines tiefziehfaehigen bleches, bandes oder dgl. aus aluminium oderlegierungen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3008679A DE3008679C2 (de) 1980-03-06 1980-03-06 Tiefziehfähiges Blech oder Band aus Nichteisen-Metall oder Legierung daraus, insbesondere aus Aluminium sowie Verfahren zu dessen Herstellung
DE3008679 1980-03-06

Publications (2)

Publication Number Publication Date
EP0035718A1 EP0035718A1 (fr) 1981-09-16
EP0035718B1 true EP0035718B1 (fr) 1984-08-08

Family

ID=6096480

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81101433A Expired EP0035718B1 (fr) 1980-03-06 1981-02-27 Procédé pour la fabrication d'une feuille ou bande en aluminium ou alliage d'aluminium présentant une bonne aptitude à l'emboutissage profond

Country Status (4)

Country Link
US (1) US4634475A (fr)
EP (1) EP0035718B1 (fr)
AT (1) ATE8853T1 (fr)
DE (1) DE3008679C2 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES8404623A1 (es) * 1982-12-13 1984-05-01 Galicia Aluminio Procedimiento de fabricacion de discos de aluminio para la formacion de envases metalicos.
DE3705100A1 (de) * 1987-02-18 1988-09-01 Benecke Gmbh J Verfahren zur herstellung einer oberflaechenstruktur von praegewalzen sowie nach dem verfahren hergestellte praegewalze
DE3713909A1 (de) 1987-04-25 1988-11-10 Vaw Ver Aluminium Werke Ag Tiefziehfaehiges blech oder band aus aluminium oder aluminiumlegierungen sowie verfahren zu seiner herstellung
US5305362A (en) * 1992-12-10 1994-04-19 Hewlett-Packard Company Spur reduction for multiple modulator based synthesis
EP0690142A1 (fr) * 1994-06-09 1996-01-03 The Furukawa Electric Co., Ltd. TÔle en alliage d'aluminium pour carrosseries d'automobiles, son procédé de fabrication et son procédé de formage
EP1166905B1 (fr) * 2000-06-29 2005-10-05 Corus Aluminium N.V. Procédé de fabrication d'une tôle en aluminium et tôle en aluminium
DE10221515C1 (de) * 2002-05-14 2003-11-13 Hydro Aluminium Deutschland Verfahren zur Herstellung eines Aluminiumrohres
CN101885019B (zh) * 2010-06-24 2013-01-02 镇江源龙铝业有限责任公司 一种双辊轧制拉丝铝带的制造方法
CN111378911B (zh) * 2020-04-27 2021-06-15 广东万和热能科技有限公司 铸铝件的抛丸工艺方法

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487674A (en) * 1965-06-06 1970-01-06 Fuji Iron & Steel Co Ltd Method of producing cold rolled steel sheets suitable for press forming
AT345236B (de) * 1973-10-17 1978-09-11 Alusuisse Walzgeruest zum walzen von aluminium und aluminiumlegierungen
AT347387B (de) * 1973-10-17 1978-12-27 Alusuisse Walzgeruest zum walzen von aluminium und aluminiumlegierungen

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2290623A1 (fr) * 1974-11-06 1976-06-04 Lorraine Laminage Tole pour emboutissage profond ou extraprofond et procede d'obtention d'une telle tole

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3487674A (en) * 1965-06-06 1970-01-06 Fuji Iron & Steel Co Ltd Method of producing cold rolled steel sheets suitable for press forming
AT345236B (de) * 1973-10-17 1978-09-11 Alusuisse Walzgeruest zum walzen von aluminium und aluminiumlegierungen
AT347387B (de) * 1973-10-17 1978-12-27 Alusuisse Walzgeruest zum walzen von aluminium und aluminiumlegierungen

Also Published As

Publication number Publication date
DE3008679C2 (de) 1983-08-18
EP0035718A1 (fr) 1981-09-16
US4634475A (en) 1987-01-06
ATE8853T1 (de) 1984-08-15
DE3008679A1 (de) 1981-09-10

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