EP2314397B1 - Procédé de fabrication d'un élément à partir d'une tôle - Google Patents
Procédé de fabrication d'un élément à partir d'une tôle Download PDFInfo
- Publication number
- EP2314397B1 EP2314397B1 EP10006975A EP10006975A EP2314397B1 EP 2314397 B1 EP2314397 B1 EP 2314397B1 EP 10006975 A EP10006975 A EP 10006975A EP 10006975 A EP10006975 A EP 10006975A EP 2314397 B1 EP2314397 B1 EP 2314397B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- sheet metal
- sheet
- shaped
- punching
- band
- 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.)
- Not-in-force
Links
Images
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 forming operations, according to the preamble of patent claim 1.
- From the GB 2 385 816 B or the WO 02/32599 A1 is a generic method, with which for cold work hardening of a sheet this wave and lattice-like deformed.
- a device which has two toothed rollers, between which a sheet is deformed.
- the wave-like indentations are larger than the thickness of the starting workpiece.
- the WO 95/08409 A1 teaches for surface roughening a knurling pattern with bowl-like indentations which extend through the thickness of the sheet.
- Forming 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 some cases 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.
- 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.
- the structure is formed by impressions 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 impressions are formed as lines-shaped 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 in particular made 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 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.
- 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.
- a surface side of the sheet 10 are line-shaped indentations 14 are introduced.
- 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)
Claims (8)
- Procédé de fabrication d'un élément à partir d'une tôle (10), qui est formée par des opérations successives d'estampage et de façonnage, dans lequel une structure (12) qui augmente la résistance de la tôle (10) est introduite sans usinage dans une surface de la tôle (10) avant le formage de l'élément,
caractérisé en ce que la structure (12) augmentant la résistance est estampée dans la tôle (10) sous forme de structure de surface et des estampages linéaires (14) sont formés dans la tôle plate (10), estampages dont la profondeur est inférieure à une épaisseur de la tôle (10) et est comprise entre 5 % et 80 % de l'épaisseur de la tôle (10). - Procédé selon la revendication 1, caractérisé en ce que les estampages linéaires (14) présentent une largeur de quelques millimètres.
- Procédé selon la revendication 2,
caractérisé
en ce que la tôle (10) est prévue d'une épaisseur de 1 mm à 10 mm et
en ce que les estampages (14) sont réalisés sur une épaisseur de 0,1 mm à 5 mm. - Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que les estampages (14) sont introduits dans la tôle (10) par roulage avec au moins un cylindre de gaufrage.
- Procédé selon l'une quelconque des revendications 1 à 4, caractérisé en ce que, comme tôle (10), on utilise une tôle en bande (10) qui est enroulée en une bobine.
- Procédé selon la revendication 5,
caractérisé
en ce que les opérations d'estampage et de façonnage sont effectuées le long d'une ligne de transfert avec des outils d'estampage et de cintrage, et
en ce que la tôle en bande (10) est alimentée en permanence depuis la bobine par un dispositif de déroulage, au moins un cylindre de gaufrage étant placé entre la ligne de transfert et le dispositif de déroulage pour réaliser la structure (12). - Procédé selon l'une quelconque des revendications 1 à 6, caractérisé en ce que, le long d'une tôle en bande (10), la structure (12) est réalisée au moins le long de zones en forme de bandes.
- Procédé selon l'une quelconque des revendications 1 à 7, caractérisé en ce que la structure (12) est réalisée avec des renfoncements disposés en réseau ou en treillis.
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 EP2314397A1 (fr) | 2011-04-27 |
EP2314397B1 true 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) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102021207020A1 (de) * | 2021-07-05 | 2023-01-05 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung eingetragener Verein | Verfahren zur Herstellung von durch Umformen erhaltenen Blechbauteilen |
Family Cites Families (10)
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 |
DE19606981C2 (de) * | 1996-02-24 | 2001-12-13 | Thyssenkrupp Stahl Ag | Verfahren zur Herstellung von Leichtbaubändern oder Leichtbaublechen |
DE10020176C2 (de) | 2000-04-25 | 2003-10-09 | Fischer & Kaufmann Gmbh & Co K | Verfahren zur Herstellung einer Scheibe mit einer verdickten Nabe durch Tiefziehen |
KR100394557B1 (ko) * | 2000-10-16 | 2003-08-19 | 주식회사 진웅테크놀러지 | 메쉬형 비드가 형성된 덕트용 금속 플레이트의 제조 장치 |
DE10054802C2 (de) | 2000-11-03 | 2002-11-14 | Fischer & Kaufmann Gmbh & Co K | Verfahren zur Herstellung eines formstabilen Gelenkteiles |
GB0204873D0 (en) * | 2002-03-01 | 2002-04-17 | Hadley Ind Plc | Strengthening of sheet materials |
DE20303062U1 (de) | 2003-02-25 | 2003-04-30 | Fischer & Kaufmann Gmbh & Co K | Blechteil |
DE10314115A1 (de) * | 2003-03-28 | 2004-10-14 | Audi Ag | Verfahren zur Umformung einer Platine aus einem Vergütungsstahl und Vorrichtung zur Durchführung des Verfahrens |
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 |
-
2009
- 2009-09-22 DE DE102009042435A patent/DE102009042435A1/de not_active Withdrawn
-
2010
- 2010-07-06 EP EP10006975A patent/EP2314397B1/fr not_active Not-in-force
- 2010-07-06 PL PL10006975T patent/PL2314397T3/pl unknown
- 2010-07-06 AT AT10006975T patent/ATE546241T1/de active
Also Published As
Publication number | Publication date |
---|---|
EP2314397A1 (fr) | 2011-04-27 |
DE102009042435A1 (de) | 2011-04-14 |
ATE546241T1 (de) | 2012-03-15 |
PL2314397T3 (pl) | 2012-07-31 |
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