EP0289775B1 - Tôle ou bande en aluminium ou en alliage d'aluminium, apte à l'emboutissage profond et procédé pour sa fabrication - Google Patents

Tôle ou bande en aluminium ou en alliage d'aluminium, apte à l'emboutissage profond et procédé pour sa fabrication Download PDF

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Publication number
EP0289775B1
EP0289775B1 EP88104904A EP88104904A EP0289775B1 EP 0289775 B1 EP0289775 B1 EP 0289775B1 EP 88104904 A EP88104904 A EP 88104904A EP 88104904 A EP88104904 A EP 88104904A EP 0289775 B1 EP0289775 B1 EP 0289775B1
Authority
EP
European Patent Office
Prior art keywords
sheet
deep
deep drawing
aluminium
honeycomb
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
EP88104904A
Other languages
German (de)
English (en)
Other versions
EP0289775A2 (fr
EP0289775A3 (en
Inventor
Friedrich Dr. Ostermann
Christian Dr. Dumont
Rainer Dipl.-Ing. Balbach
Gerhard Dipl.-Ing. Söllner
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.)
Vaw Aluminium AG
Original Assignee
Vaw Aluminium 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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=6326304&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0289775(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Vaw Aluminium AG filed Critical Vaw Aluminium AG
Priority to AT88104904T priority Critical patent/ATE83180T1/de
Publication of EP0289775A2 publication Critical patent/EP0289775A2/fr
Publication of EP0289775A3 publication Critical patent/EP0289775A3/de
Application granted granted Critical
Publication of EP0289775B1 publication Critical patent/EP0289775B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C1/00—Making non-ferrous alloys
    • C22C1/04—Making non-ferrous alloys by powder metallurgy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/227—Surface roughening or texturing
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
    • B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
    • B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
    • B21B1/28—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process by cold-rolling, e.g. Steckel cold mill
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B3/00—Rolling materials of special alloys so far as the composition of the alloy requires or permits special rolling methods or sequences ; Rolling of aluminium, copper, zinc or other non-ferrous metals
    • B21B2003/001—Aluminium or its alloys
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B2261/00—Product parameters
    • B21B2261/14—Roughness
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/12—All metal or with adjacent metals
    • Y10T428/12993—Surface feature [e.g., rough, mirror]

Definitions

  • the invention relates to a deep-drawn sheet, band or the like.
  • a deep-drawn sheet of the type mentioned is known from DE-A 30 08 679. Due to the roughening process used, it has an uneven micro-roughness of approximately 0.8 to 5 ⁇ m with finely distributed, mostly slender tips on the surface. The non-uniformity relates to the height and the diameter of the tips or the distance and the outline of the depressions in the surface. In conjunction with the hold-down device, the depressions should be sealed during deep drawing so that the lubricant filling absorbed remains enclosed (see column 3, lines 60 ff.).
  • roller surface is roughened by sandblasting in accordance with the known method according to DE-OS 30 08 679, and the desired micro surface is thus produced by re-rolling the sheet or strip.
  • the depressions for the lubricant are arranged offset from one another, but a closer examination shows that the micro-depressions are interconnected, so that the absorbed lubricant filling can flow off laterally .
  • the object of the present invention is to enable hydrodynamic pressure build-up in the pinch gap between the tool surface and sheet metal roughness peaks in a deep-drawable sheet or a deep-drawable strip of the type mentioned above, and thus to improve the sliding properties in the drawing tool and to reduce the drawing force by at least 30% compared to conventional surfaces .
  • a particularly favorable micro surface for avoiding wrinkles and cracks can be achieved with a honeycomb density of 10 - 250 honeycombs per mm2. In the preferred range of between 100-140 honeycombs per mm2, a particularly high drawing reserve (according to Engelhardt) of at least 28% is established, the honeycomb diameter being 20-200 ⁇ m, preferably 80-100 ⁇ m.
  • the honeycomb diameter corresponds to the diameter of the circle encompassing the honeycomb structure.
  • the micro surface according to the invention in a honeycomb structure is produced by appropriately prepared rolls with a degree of rolling> 6% in the last cold rolling pass.
  • the aluminum sheets or strips produced in this way are suitable for deep drawing, stretching and ironing all types of aluminum alloys.
  • the supporting surface of the honeycomb structure is denoted by 1 and the lubricant filling by 2. It can be seen that the honeycomb structure is designed like a lubricant pocket, in which the lubricant is enclosed on all sides.
  • FIG. 2 shows the micro surface of a sheet metal surface produced by means of a sandblasted roller.
  • the load-bearing roughness tips 3 are surrounded by the lubricant 4, which can flow laterally into channel-like openings. This does not result in a stable build-up of pressure, since the lubricating film is not formed with constant uniformity and tears off at the places subject to higher loads.
  • FIG. 3 shows a cross section through the deep-drawable sheet metal 5 produced according to the invention and a hold-down device 6 in the region of the deformation zone. Due to the relative movement between sheet metal and tool, a hydrodynamic pressure is built up in the gap 8 between sheet metal 5 and hold-down device 6. The squeezing flow of the lubricant is indicated by arrows 7.
  • the sheet metal surfaces are given with (1) irregular for DE-OS 30 08 679, (2) honeycomb structure for the sheet treated according to the invention and (3) with finish for a sheet made by means of ground rolls.
  • the second line shows the surface roughness RA according to DIN 4768, measured parallel to the rolling direction, in line three the surface roughness perpendicular to the rolling direction.
  • Line four shows the drawing reserve according to Engelhardt and line five shows the pulling force in kN for the sheet in question.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Metal Rolling (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Laminated Bodies (AREA)
  • Furnace Charging Or Discharging (AREA)
  • Catalysts (AREA)
  • Manufacture Of Alloys Or Alloy Compounds (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Claims (5)

  1. Tôle, feuillard ou analogue apte à l'emboutissage profond, en métal non ferreux ou en alliages de ce dernier, en particulier en aluminium, ayant une surface prétraitée pour l'emboutissage profond, caractérisé en ce que la surface présente des microrugosités de Ra = 0,1 - 0,8 µm avec une structure régulière en nids d'abeille, le diamètre des nids d'abeille étant de 20 - 200 µm, de préférence de 80 - 100 µm.
  2. Tôle apte à l'emboutissage profond selon la revendication 1, caractérisée en ce que la structure (1) en nids d'abeille est formée d'une cloison (8) de nids d'abeille ayant une hauteur constante H et une épaisseur D, le rapport de H : D = 0,1 - 1,2 : 1.
  3. Tôle apte à l'emboutissage profond selon l'une des revendications précédentes, caractérisée en ce que l'épaisseur D de la cloison, qui correspond à la distance séparant les nids d'abeille, fluctue de ± 5 % dans la totalité de la structure en nids d'abeille de la tôle.
  4. Tôle apte à l'emboutissage profond selon l'une des revendications précédentes, caractérisée en ce que la densité des nids d'abeille est comprise entre 10 et 250, de préférence 100 - 140 nids d'abeille par mm².
  5. Procédé de production d'une tôle, d'un feuillard ou analogue apte à l'emboutissage profond, à l'étirage ou à l'étirage à anneau, caractérisé en ce que le taux de laminage à la dernière passe de laminage à froid est > 6%, la structure fine de la surface étant établie par laminage, à la dernière passe de laminage.
EP88104904A 1987-04-25 1988-03-26 Tôle ou bande en aluminium ou en alliage d'aluminium, apte à l'emboutissage profond et procédé pour sa fabrication Expired - Lifetime EP0289775B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88104904T ATE83180T1 (de) 1987-04-25 1988-03-26 Tiefziehfaehiges blech oder band aus aluminium oder aluminiumlegierungen sowie verfahren zu seiner herstellung.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3713909 1987-04-25
DE19873713909 DE3713909A1 (de) 1987-04-25 1987-04-25 Tiefziehfaehiges blech oder band aus aluminium oder aluminiumlegierungen sowie verfahren zu seiner herstellung

Publications (3)

Publication Number Publication Date
EP0289775A2 EP0289775A2 (fr) 1988-11-09
EP0289775A3 EP0289775A3 (en) 1990-05-23
EP0289775B1 true EP0289775B1 (fr) 1992-12-09

Family

ID=6326304

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88104904A Expired - Lifetime EP0289775B1 (fr) 1987-04-25 1988-03-26 Tôle ou bande en aluminium ou en alliage d'aluminium, apte à l'emboutissage profond et procédé pour sa fabrication

Country Status (8)

Country Link
US (1) US4886713A (fr)
EP (1) EP0289775B1 (fr)
JP (1) JPH01111850A (fr)
KR (1) KR880012783A (fr)
AT (1) ATE83180T1 (fr)
DE (2) DE3713909A1 (fr)
ES (1) ES2037756T3 (fr)
GR (1) GR3006950T3 (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH683188A5 (de) * 1991-01-11 1994-01-31 Alusuisse Lonza Services Ag Aluminiumoberflächen.
FR2715593B1 (fr) * 1994-02-01 1996-03-29 Pechiney Rhenalu Bandes ou tôles d'aluminium à propriétés optiques reproductibles et améliorées.
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
US6290632B1 (en) * 1998-12-10 2001-09-18 Alcoa Inc. Ultrafine matte finish roll for treatment for sheet products and method of production
US6807836B2 (en) 2001-10-09 2004-10-26 Ormet Corporation Method of applying a surface finish on a metal substrate and method of preparing work rolls for applying the surface finish
DE10221515C1 (de) * 2002-05-14 2003-11-13 Hydro Aluminium Deutschland Verfahren zur Herstellung eines Aluminiumrohres
US20060138702A1 (en) * 2004-12-23 2006-06-29 Biernath Rolf W Method of making uniaxially oriented articles having structured surfaces
US20060141218A1 (en) * 2004-12-23 2006-06-29 Biernath Rolf W Uniaxially oriented articles having structured surface
US20060141220A1 (en) * 2004-12-23 2006-06-29 Merrill William W Uniaxially oriented article having a structured surface
US20060141219A1 (en) * 2004-12-23 2006-06-29 Benson Olester Jr Roll of a uniaxially oriented article having a structured surface
US7418202B2 (en) 2005-08-04 2008-08-26 3M Innovative Properties Company Article having a birefringent surface and microstructured features having a variable pitch or angles for use as a blur filter
US20070199627A1 (en) * 2006-02-27 2007-08-30 Blejde Walter N Low surface roughness cast strip and method and apparatus for making the same
US9134471B2 (en) 2006-06-28 2015-09-15 3M Innovative Properties Company Oriented polymeric articles and method
DE102016103539B4 (de) * 2016-02-29 2018-09-20 Thyssenkrupp Ag Verfahren zur Herstellung eines mehrdimensional gefügestrukturierten, tiefziehfähigen Metallflachprodukts und Metallflachprodukt

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3619881A (en) * 1969-01-17 1971-11-16 United States Steel Corp Cold rolling work roll
FR2290623A1 (fr) * 1974-11-06 1976-06-04 Lorraine Laminage Tole pour emboutissage profond ou extraprofond et procede d'obtention d'une telle tole
JPS5431069A (en) * 1977-08-12 1979-03-07 Kawasaki Steel Co Surface finishing of cold rolled steel plate
GB2047274B (en) * 1979-03-29 1983-05-25 Fuji Photo Film Co Ltd Support for lithographic printing plates and process for their production
DE3008679C2 (de) * 1980-03-06 1983-08-18 Vereinigte Metallwerke Ranshofen-Berndorf AG, 5282 Braunau am Inn, Oberösterreich Tiefziehfähiges Blech oder Band aus Nichteisen-Metall oder Legierung daraus, insbesondere aus Aluminium sowie Verfahren zu dessen Herstellung
JPS6171109A (ja) * 1984-09-14 1986-04-12 Kobe Steel Ltd 深絞り成形加工用アルミニウムおよびアルミニウム合金板

Also Published As

Publication number Publication date
ES2037756T3 (es) 1993-07-01
US4886713A (en) 1989-12-12
DE3876484D1 (de) 1993-01-21
ATE83180T1 (de) 1992-12-15
EP0289775A2 (fr) 1988-11-09
GR3006950T3 (fr) 1993-06-30
DE3713909A1 (de) 1988-11-10
KR880012783A (ko) 1988-11-29
JPH01111850A (ja) 1989-04-28
EP0289775A3 (en) 1990-05-23

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