EP2314397A1 - Procédé de fabrication d'un élément à partir d'une tôle et élément en tôle - Google Patents

Procédé de fabrication d'un élément à partir d'une tôle et élément en tôle Download PDF

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Publication number
EP2314397A1
EP2314397A1 EP10006975A EP10006975A EP2314397A1 EP 2314397 A1 EP2314397 A1 EP 2314397A1 EP 10006975 A EP10006975 A EP 10006975A EP 10006975 A EP10006975 A EP 10006975A EP 2314397 A1 EP2314397 A1 EP 2314397A1
Authority
EP
European Patent Office
Prior art keywords
sheet
sheet metal
metal
indentations
punching
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.)
Granted
Application number
EP10006975A
Other languages
German (de)
English (en)
Other versions
EP2314397B1 (fr
Inventor
Hugo Bischopink
Meinolf Schröder
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.)
Fischer and Kaufmann GmbH and Co KG
Original Assignee
Fischer and Kaufmann GmbH and Co KG
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 Fischer and Kaufmann GmbH and Co KG filed Critical Fischer and Kaufmann GmbH and Co KG
Priority to PL10006975T priority Critical patent/PL2314397T3/pl
Publication of EP2314397A1 publication Critical patent/EP2314397A1/fr
Application granted granted Critical
Publication of EP2314397B1 publication Critical patent/EP2314397B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21D49/00—Sheathing or stiffening objects
    • 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
    • B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
    • B21D13/04—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by rolling
    • 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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/04—Forming single grooves in sheet metal or tubular or hollow articles by rolling
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D7/00—Modifying the physical properties of iron or steel by deformation
    • C21D7/02—Modifying the physical properties of iron or steel by deformation by cold working
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/32—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material
    • E04C2/326—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure formed of corrugated or otherwise indented sheet-like material; composed of such layers with or without layers of flat sheet-like material with corrugations, incisions or reliefs in more than one direction of the element

Definitions

  • the invention relates to a method for producing a part from a sheet, which is formed by successive punching and bending operations, according to the preamble of claim 1. Furthermore, the invention relates to a sheet metal part according to the preamble of claim 9.
  • Generic methods and sheet metal parts are for example from the DE 100 20 176 C2 , of the DE 100 54 802 C2 , of the DE 103 56 746 B4 or the DE 103 44 885 B3 known.
  • complex three-dimensional workpieces in part with different wall thickness profiles, can be produced from a metal sheet by means of corresponding punching and bending processes, which only a few years ago could be produced merely as forgings or cast workpieces.
  • the invention has for its object to further improve this known prior art for the production of a sheet metal part in terms of material and weight savings.
  • the method according to the invention is characterized in that, prior to molding of the part into a surface of the sheet, a structure is impressed without cutting, by which the strength of the sheet is increased.
  • a basic idea of the invention is to impress a defined structure in the starting sheet before forming a sheet metal part. As a result, a defined strain hardening of the sheet occurs, so that an output sheet with a smaller sheet thickness can be used in comparison to the use of a non-pretreated starting sheet to achieve desired strength values of the finished part. It can therefore be achieved with a lower material usage and thus with a reduced weight a desired end part with the same or even higher strength. This is particularly advantageous in the production of vehicle parts, such as levers, bearing parts, bushes and the like.
  • an advantageous embodiment of the invention is that the structure is formed by indentations in the sheet, wherein a depth of the impressions is smaller than a thickness of the sheet. It is a surface structure formed by the indentations, so to speak, but no major transformations, such as bends, which affect the subsequent shaping of a complex three-dimensional part of the still flat sheet.
  • An embossed surface structure is not disturbing, in particular in the case of installation components not visible from the outside, for example in the engine compartment or on the chassis of a motor vehicle.
  • the indentations are preferably formed as linear and / or punctiform depressions.
  • the sheet is provided with a thickness of 1 mm to 10 mm and that the indentations are formed with a depth of 0.1 mm to 5 mm.
  • the depth of the impressions between 5% and 80% of the thickness of the sheet, which is formed in particular of steel or another metal.
  • the impressions can be formed in the surface of the sheet in any way, such as by pressing. It is particularly advantageous, however, that the impressions are introduced by rolling by means of at least one embossing roller in the sheet. It is thus possible to create a regular structure in a continuous work process.
  • the indentations can be provided on one or both sides of the sheet.
  • a strip-shaped sheet metal is used as the sheet, which is wound into a coil.
  • the embossing can take place by means of one or more embossing rolls.
  • the embossing rollers can not only depress the depressions in the sheet, but produce an additional increase in strength over the entire surface of the sheet metal strip by applying a compressive stress over the entire width of the sheet metal strip. In this case also surface roughnesses of the starting sheet are advantageously reduced.
  • a particularly advantageous procedure results in that the punching and bending operations along a transfer line with punching and bending tools are carried out and that the band-shaped sheet is fed from the coil of a unwinding constantly, wherein at least one embossing roller between the transfer line and the unwinding is arranged for introducing the structure.
  • the stamping and bending tools necessary for forming the three-dimensional sheet-metal part which also include folding, stamping and other forming tools, are designed as transfer tools which are arranged side by side in a press. Each press stroke thus performs a work step.
  • the press is opened, the workpiece is transferred by a basically known conveying mechanism into the respectively following tool until the finished shaped workpiece is ejected.
  • a collection of the band-shaped sheet metal from the coil mounted on the unwinding is arranged.
  • the structure is impressed at least along strip-shaped areas.
  • the structure can thus be provided uniformly over the entire surface of the starting sheet.
  • the surface structure can be formed only in certain areas of the sheet, so that other areas of the sheet remain undeformed. This can be done, for example, in the areas which are subsequently either punched out of the stamping and bending tools or reshaped in such a way that sufficient strain hardening is achieved by this deformation.
  • areas with different structures can also be embossed in the metal sheet, so that regions with different degrees of strength are set across the width of the strip. It is thus possible to create a starting sheet with a differentiated distribution of strength.
  • the differentiation can be generated by denser, deeper or larger imprints.
  • a desired defined degree of solidification in individual regions can be formed for the subsequent forming. No or little pre-consolidation by the indentations is set in particular in the areas of the sheet, which are removed or reshaped during subsequent punching and bending.
  • the circumference of the embossing roll would correspond to the length of a sheet metal section required for forming a part and cut to length from the sheet metal strip.
  • the embossed structure would thus be repeated regularly in each sheet metal section.
  • the structure is formed with mesh or lattice-like recesses arranged. It is particularly advantageous according to the invention that the depressions or indentations in cross section have a rounded recess bottom and rounded transitions to the flat surface. This is a particularly good pre-consolidation of the sheet and it Kerberpositionen be avoided in the subsequent forming operations.
  • the individual line-shaped or punctiform depressions may have a mutual distance in the tenth of a millimeter range up to the centimeter range, preferably between 0.5 mm and 10 mm.
  • the lines can extend over the entire length and width of the band-shaped sheet and can have a width of 0.5 to a few millimeters.
  • the width of the recesses is about one to four times the depth of the indentations.
  • the invention also encompasses a sheet-metal part, which is characterized in that, prior to molding of the sheet-metal part into a surface of the sheet, it is provided by stamping with a regular structure, by means of which the strength of the sheet is increased.
  • the sheet metal part is produced in particular by the method described above, the advantages explained above being achieved.
  • FIG Fig. 1 One possible pattern for a uniform structure 12 which can be stamped into a sheet 10 is in FIG Fig. 1 shown.
  • the structure 12 comprises rectilinear impressions, which are arranged in a grid or diamond-shaped uniformly on a surface of a metal sheet 10.
  • FIG. 2 An alternative form of training is in Fig. 2 shown in which the structure 12 is impressed in a wave-like manner in the surface of a sheet 10.
  • the wave-shaped depressions are not formed uniformly over the width of the band-shaped sheet 10.
  • the indentations are denser, ie arranged with a smaller line spacing than in an outer region. hereby a defined strength distribution over the width of the band-shaped sheet 10 is achieved.
  • FIG Fig. 3 A further exemplary embodiment of a sheet 10 pretreated according to the invention is shown in FIG Fig. 3 shown.
  • line or punctiform impressions 14 are introduced in a surface side of the sheet 10 .
  • the transitions 16 of the impressions 14 are rounded in the flat surface side, as well as the bottom 18 of the wells. As a result, notch stresses are avoided during subsequent forming.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Architecture (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Structural Engineering (AREA)
  • Civil Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
EP10006975A 2009-09-22 2010-07-06 Procédé de fabrication d'un élément à partir d'une tôle Not-in-force EP2314397B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL10006975T PL2314397T3 (pl) 2009-09-22 2010-07-06 Sposób produkcji elementu z blaszanego

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102009042435A DE102009042435A1 (de) 2009-09-22 2009-09-22 Verfahren zum Herstellen eines Teiles aus einem Blech und Blechteil

Publications (2)

Publication Number Publication Date
EP2314397A1 true EP2314397A1 (fr) 2011-04-27
EP2314397B1 EP2314397B1 (fr) 2012-02-22

Family

ID=43648062

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10006975A Not-in-force EP2314397B1 (fr) 2009-09-22 2010-07-06 Procédé de fabrication d'un élément à partir d'une tôle

Country Status (4)

Country Link
EP (1) EP2314397B1 (fr)
AT (1) ATE546241T1 (fr)
DE (1) DE102009042435A1 (fr)
PL (1) PL2314397T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023280839A1 (fr) * 2021-07-05 2023-01-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procédé de fabrication de pièces en tôle obtenues par formage

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4343866A (en) * 1975-10-16 1982-08-10 Manville Service Corporation Deeply embossed sheet product
WO1995008409A1 (fr) * 1993-09-24 1995-03-30 Bhp Steel (Jla) Pty. Ltd. Articles en tole ouvree laminee a froid
WO2002032599A1 (fr) * 2000-10-16 2002-04-25 Jinwoong Tech. Co. Tole a nervure de type a maille pour conduit et son appareil de production
EP0894037B1 (fr) * 1996-02-24 2002-05-02 ThyssenKrupp Stahl AG Procede pour la production de feuillards legers ou de toles legeres
DE10054802C2 (de) 2000-11-03 2002-11-14 Fischer & Kaufmann Gmbh & Co K Verfahren zur Herstellung eines formstabilen Gelenkteiles
DE10020176C2 (de) 2000-04-25 2003-10-09 Fischer & Kaufmann Gmbh & Co K Verfahren zur Herstellung einer Scheibe mit einer verdickten Nabe durch Tiefziehen
GB2385816B (en) * 2002-03-01 2004-07-07 Hadley Ind Plc Indented sheet materials
EP1462192A1 (fr) * 2003-03-28 2004-09-29 Audi Ag Procédé de formage d'une tôle en acier de traitement et dispositif pour la mise en oeuvre du procédé
DE10344885B3 (de) 2003-09-26 2005-01-13 Fischer & Kaufmann Gmbh & Co. Kg Verfahren zum Herstellen eines Werkstücks mit Nabe mittels einer Presse und Blechwerkstück
DE10356746B4 (de) 2003-02-25 2005-06-30 Fischer & Kaufmann Gmbh & Co. Kg Blechteil und dafür vorgesehenes Herstellungsverfahren

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4343866A (en) * 1975-10-16 1982-08-10 Manville Service Corporation Deeply embossed sheet product
WO1995008409A1 (fr) * 1993-09-24 1995-03-30 Bhp Steel (Jla) Pty. Ltd. Articles en tole ouvree laminee a froid
EP0894037B1 (fr) * 1996-02-24 2002-05-02 ThyssenKrupp Stahl AG Procede pour la production de feuillards legers ou de toles legeres
DE10020176C2 (de) 2000-04-25 2003-10-09 Fischer & Kaufmann Gmbh & Co K Verfahren zur Herstellung einer Scheibe mit einer verdickten Nabe durch Tiefziehen
WO2002032599A1 (fr) * 2000-10-16 2002-04-25 Jinwoong Tech. Co. Tole a nervure de type a maille pour conduit et son appareil de production
DE10054802C2 (de) 2000-11-03 2002-11-14 Fischer & Kaufmann Gmbh & Co K Verfahren zur Herstellung eines formstabilen Gelenkteiles
GB2385816B (en) * 2002-03-01 2004-07-07 Hadley Ind Plc Indented sheet materials
DE10356746B4 (de) 2003-02-25 2005-06-30 Fischer & Kaufmann Gmbh & Co. Kg Blechteil und dafür vorgesehenes Herstellungsverfahren
EP1462192A1 (fr) * 2003-03-28 2004-09-29 Audi Ag Procédé de formage d'une tôle en acier de traitement et dispositif pour la mise en oeuvre du procédé
DE10344885B3 (de) 2003-09-26 2005-01-13 Fischer & Kaufmann Gmbh & Co. Kg Verfahren zum Herstellen eines Werkstücks mit Nabe mittels einer Presse und Blechwerkstück

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2023280839A1 (fr) * 2021-07-05 2023-01-12 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Procédé de fabrication de pièces en tôle obtenues par formage

Also Published As

Publication number Publication date
PL2314397T3 (pl) 2012-07-31
EP2314397B1 (fr) 2012-02-22
DE102009042435A1 (de) 2011-04-14
ATE546241T1 (de) 2012-03-15

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