EP2108467A2 - Procédé de fabrication de demi-coques de dimensions très précises - Google Patents
Procédé de fabrication de demi-coques de dimensions très précises Download PDFInfo
- Publication number
- EP2108467A2 EP2108467A2 EP09156326A EP09156326A EP2108467A2 EP 2108467 A2 EP2108467 A2 EP 2108467A2 EP 09156326 A EP09156326 A EP 09156326A EP 09156326 A EP09156326 A EP 09156326A EP 2108467 A2 EP2108467 A2 EP 2108467A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- board
- bulges
- punch
- process section
- hold
- 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
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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/20—Deep-drawing
- B21D22/201—Work-pieces; preparation of the work-pieces, e.g. lubricating, coating
-
- 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
-
- 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 forming blanks by drawing in a tool with a punch, a die and a hold-down.
- the dimensional accuracy of half-shell parts which are produced by pulling a board, is regularly subject to quality problems in manufacturing.
- High demands on the dimensional stability are made especially in the automotive industry, since the half-shell parts often interact with other components or half-shell parts or must be joined with them.
- the dimensional stability of formed blanks is significantly influenced by the fact that by forming processes stresses are introduced into the boards, which make themselves felt by a springback of the formed board after forming. This significantly reduces the dimensional accuracy of the reshaped board and greatly complicates the manufacturing process for high precision components. So far, this problem has been solved by making a preform to reshape it into another endform tool. Due to the intermediate step of preforming, on the one hand, the strains introduced per forming step are not so great. On the other hand, however, arise due to the intermediate step of producing an intermediate form relatively high costs. Above all, the forming tools for the preform but also the extension of the production times by two separate steps lead to a cost burden of the entire process to the production of the
- German patent application DE 197 42 818 A1 the production of a structural component for motor vehicles is known, which has a reinforcing plate, which provides a deformation reserve by depressions and elevations in the deformation of the base plate and the reinforcing plate.
- the reinforcing plate provided with elevations and depressions to prevent wrinkling or cracking during the common deformation with the base plate.
- the said German patent application thus deals with the transformation of reinforced or "patched" boards. Although cracks and wrinkles during forming can be prevented by providing deformation reserves in the form of bulges for the reinforcing sheet. However, the dimensional accuracy of the reshaped board outside the reinforced area is not improved.
- the European patent EP 1 708 832 B1 discloses a hydroforming a board with bulges and / or depressions, which is to be increased by the bulges / depressions, the maximum degree of deformation. Hydroforming can only be used in combination with closed hollow sections. Therefore, no half shells are produced by this method. In addition, the active-media-based forming is very complex and relatively expensive compared to conventional thermoforming.
- the object of the present invention is to provide a method for forming blanks by drawing in a tool with a punch, a die and a blank holder provide, with which high-dimensional, formed plates can be produced, which are particularly suitable due to the high dimensional accuracy in the automotive industry.
- the above-described object is achieved for a generic method in that a board with a plurality of introduced bulges in a tool, such as a die is introduced, the hold-down in the flange portions of the board in a first process section in a first position is added, which corresponds to the height of the bulges of the flange portions of the board added to the board thickness, the hold down the flange portions of the board holds down in this position, the board is preformed using the punch in the first process section in the tool and in a second process section of Downholder and the punch are brought into the end positions, so that the board is formed by the punch to the final shape and the hold-down smooths the bulges of the flange portions of the board.
- deformation reserves can be made available by the method according to the invention during the forming of the blanks and the blank can be upset during its deformation over its entire cross-sectional length. Due to the improved deformation reserves due to the provision of material in the bulges, larger degrees of deformation during drawing can be achieved. It can be aligned by the compression of the board over its entire cross-sectional length existing voltages. This leads to particularly dimensionally stable components, since a springback or a reverse deformation of the components then mainly in one Direction takes place. According to the invention, in the first method section, the deformation reserve is utilized, in particular in the transition areas between the punch and the drawing radius, which are provided by the bulges.
- both process sections preferably take place in the same tool, for example in the same die, so that over the previously known preforms significant cost savings and at the same time highly dimensional components can be made available.
- the bulges in the preformed board and in the second process section, the blank holder and then the punch is brought to the end positions, so first in the region of the blank and then in the remaining area Bumps are smoothed.
- the stresses in the drawn component can be aligned particularly well and reliably.
- the blanks of steel or a higher or highest strength steel alloy are prone to problems in terms of dimensional stability by spring back, so that the inventive method is particularly advantageous for these materials.
- Higher and highest strength steel alloys offer the advantage of providing particularly low wall thicknesses with constant strength, so that weight savings are possible.
- a drawing gap between the blank and the tool greater than or equal to the height of the bulges added to the sheet thickness is provided. This will needed in particular if substantially vertical frames are to be produced while maintaining the bulge structure.
- the surface of the buckled board is 0.1-10% greater than that of a planar board.
- bulges with a circular, elliptical, polygonal and / or elongated opening surface are provided as bulges, which can be arranged one or mutually. These can easily be provided in upstream processes for manufacturing the boards, for example by band-wise embossing using rollers.
- the bulges on the board are arranged such that evenly distributed on the board even spaces between the bulges arise. This is particularly important in the case of using, for example, bulges with elliptical and / or elongated opening surfaces.
- the above-indicated object is achieved by the use of a board formed by the method according to the invention as a structural component, in particular in motor vehicle construction.
- the corresponding structural components are characterized by a particularly high dimensional stability and are therefore particularly well suited for use in motor vehicle construction. Due to the simple method and the high degree of deformation, which can be achieved with the method according to the invention, the vehicle construction can thus be provided with particularly complex, highly dimensional structural components or half shells. Depending on requirements and installation situation, the flange on the structural component can be removed.
- Fig. 1 in a perspective view of a board 1, which has a plurality of bulges 2.
- the bulges are regularly arranged and, as in Fig. 1 indicated, provided with a circular opening area. But it can also be provided on the board other bulges, such as FIGS. 2 and 3 demonstrate.
- Fig. 2 a section of a board is shown in a plan view, wherein bulges 2 'are provided with a square base and a regular arrangement.
- Fig. 3 elongated beads 2 "are provided as bulges
- the bulges serve to provide deformation reserves of the board, as they must be provided in a conversion according to the invention in a tool to produce high-dimensional components.
- FIG. 4 An embodiment of the method according to the invention shows Fig. 4 in a schematic sectional view of a die 3 for producing a half-shell from a circuit board by pulling.
- the die 3 has a hold-down 4, a punch 5 and a die 6, wherein the board 1 is pulled into the die 6 using the punch 5.
- the hold-4 is brought in accordance with the first method section according to the invention, in a position which corresponds to the height of the bulges added to the board thickness. In this position, the hold-down 4 on the bulges 2 contact with the board 1, thus keeping the board 1 in position during the first stage of the process.
- the punch 5 now forms the plate 1 provided with the bulges 2 in the region of the depression 7 of the die 6.
- the bulges in the region of the drawing radius between the later frame of the formed blank 1 and held by the hold-4 flange area of the board 1 are maintained or remain, such as Fig. 5 shows.
- Fig. 5 the end of the first method section of the embodiment of the method according to the invention is shown.
- Fig. 7 shows the die 3 from Fig. 4 at the end of the second process section in the embodiment with a one-piece punch.
- the gap during preforming or drawing for example, by a telescopic punch structure analogous to the punch 5 'can be achieved.
- This has in preference first a corresponding big gap 8 up.
- a transformation to the final shape of the half-shell can also be achieved by a stamp, which has, for example, extendable embossing elements, with which the stamp shapes the board to the final shape.
- a stamp change in the second stage of the procedure is therefore not absolutely necessary. Stamps of this type are not shown in the figures.
- the punch 5 still has extensions 5a and 5b, which encompass the area of the drawing radius between the frame and the flange area.
- a compression over the entire cross section of the component is achieved by the bulges are completely pushed out of the board 1 at the end of the second process section or smoothed.
- the reshaped board, i. Therefore, the present half-shell has a particularly high dimensional stability, since due to the upsetting over the entire cross-sectional area introduced stresses can be substantially completely degraded and targeted, so that almost no springback occur.
- the method according to the invention combines this advantage with the provision of very large degrees of deformation, which are advantageous in particular when using blanks made from higher-strength or very high-strength steels.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102008018656A DE102008018656B9 (de) | 2008-04-11 | 2008-04-11 | Verfahren zur Herstellung von hochmaßhaltigen Halbschalen |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2108467A2 true EP2108467A2 (fr) | 2009-10-14 |
EP2108467A3 EP2108467A3 (fr) | 2013-04-03 |
EP2108467B1 EP2108467B1 (fr) | 2014-11-26 |
Family
ID=40340332
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09156326.2A Not-in-force EP2108467B1 (fr) | 2008-04-11 | 2009-03-26 | Procédé de fabrication de demi-coques de dimensions très précises |
Country Status (3)
Country | Link |
---|---|
US (1) | US8240184B2 (fr) |
EP (1) | EP2108467B1 (fr) |
DE (1) | DE102008018656B9 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010094538A1 (fr) * | 2009-02-19 | 2010-08-26 | Thyssenkrupp Steel Europe Ag | Procédé de fabrication d'une pièce métallique trempée à la presse |
CN102802830A (zh) * | 2009-10-30 | 2012-11-28 | 本田技研工业株式会社 | 废料形状保持 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IL115403A0 (en) | 1995-09-22 | 1995-12-31 | Mul T Lock Technologies Ltd | Locking system for vehicle |
DE102008037612B4 (de) * | 2008-11-28 | 2014-01-23 | Thyssenkrupp Steel Europe Ag | Verfahren und Werkzeugsatz zur Herstellung von flanschbehafteten, hoch maßhaltigen und tiefgezogenen Halbschalen |
EP3100797B1 (fr) * | 2014-01-28 | 2021-06-16 | JFE Steel Corporation | Procédé de moulage par pressage, procédé de fabrication d'un composant moulé par pressage et procédé permettant de déterminer une forme de préforme destinée à être utilisée dans lesdits procédés |
JP6486774B2 (ja) * | 2015-06-12 | 2019-03-20 | 株式会社三井ハイテック | 金属板の成形方法及びこれに用いる成形装置 |
DE102016118418A1 (de) * | 2016-09-29 | 2018-03-29 | Thyssenkrupp Ag | Verfahren zur Herstellung eines geformten Bauteils mit einem maßhaltigen Zargenbereich |
EP4018538A1 (fr) * | 2019-08-23 | 2022-06-29 | Isel Automation GmbH & Co. KG | Moteur de translation et procédé de fabrication d'un stator d'un tel moteur de translation |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB808335A (en) | 1956-07-27 | 1959-02-04 | Opel Adam Ag | Improvements relating to the deep drawing of metal sheets |
DE19742818A1 (de) | 1997-09-27 | 1999-04-01 | Volkswagen Ag | Platine für ein Strukturbauteil, Strukturbauteil und Verfahren zur Herstellung eines Strukturbauteiles für Kraftfahrzeuge |
WO2005053871A1 (fr) | 2003-12-06 | 2005-06-16 | Daimlerchrysler Ag | Procede pour produire un profile creux |
Family Cites Families (21)
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US662567A (en) * | 1900-04-25 | 1900-11-27 | Isabella Von Lipowska | Metal bearing-plate. |
US1499986A (en) * | 1924-02-04 | 1924-07-01 | Kirsch Mfg Company | Channeled strip such as curtain rods or the like |
US1499985A (en) * | 1924-02-04 | 1924-07-01 | Kirsch Mfg Company | Sheet-steel article and method of making same |
US1823802A (en) * | 1927-12-10 | 1931-09-15 | Humphris Frank | Sheet of metal or material |
US1856898A (en) * | 1928-03-30 | 1932-05-03 | Alan D Wood | Fabrication of embossed metallic plates |
US1807141A (en) * | 1928-09-15 | 1931-05-26 | Alan D Wood | Embossing metallic plates |
US2112653A (en) * | 1934-03-26 | 1938-03-29 | Kelsey Hayes Wheel Co | Method of forming brake drums |
US2251477A (en) * | 1937-03-09 | 1941-08-05 | Bullard Co | Method of making hats |
US2214237A (en) * | 1938-12-23 | 1940-09-10 | Stark John | Ornamental material |
US2405778A (en) * | 1943-12-08 | 1946-08-13 | Crawford Francis | Die structure for bending sheet metal |
FR1262222A (fr) * | 1960-07-06 | 1961-05-26 | Diamond National Corp | Procédé de fabrication de tamis de formage |
FR2660220B1 (fr) * | 1990-04-03 | 1995-02-24 | Lorraine Laminage | Procede et dispositif de formage d'une partie en relief sur un flan de tole et produit obtenu selon ce procede. |
WO1993012897A1 (fr) * | 1991-12-25 | 1993-07-08 | Nippon Steel Corporation | Tole d'acier ayant des caracteristiques superieures de brillance du revetement, de resistance aux rayures et d'aptitude au façonnage |
DE4294860C2 (de) * | 1992-04-20 | 1998-10-15 | Kanemitsu Akashi Kk | Verfahren zur Herstellung eines U-förmigen Ringkörpers aus einer Metallplatte |
JP3579936B2 (ja) * | 1994-11-21 | 2004-10-20 | トヨタ自動車株式会社 | 有底筒状製品の成形方法 |
IT1297735B1 (it) * | 1997-11-28 | 1999-12-20 | Attrezzeria Mv & C Snc | Stampo di imbutitura e coniatura per la fabbricazione di recipienti metallici e simili |
US6205831B1 (en) * | 1998-10-08 | 2001-03-27 | Rayovac Corporation | Method for making a cathode can from metal strip |
DE10215912C1 (de) * | 2002-04-11 | 2003-06-12 | Daimler Chrysler Ag | Verfahren und Prägewerkzeug zur Herstellung eines Karosserie-Bauteils aus einem wölbstrukturierten Blech |
US6745609B2 (en) * | 2002-11-06 | 2004-06-08 | Daimlerchrysler Corporation | Sheet metal forming die assembly with textured die surfaces |
JP3983194B2 (ja) * | 2003-04-01 | 2007-09-26 | トヨタ自動車株式会社 | プレス成形用金型 |
JP4476913B2 (ja) * | 2004-12-13 | 2010-06-09 | ジヤトコ株式会社 | カップ状部材の成形方法及びその装置 |
-
2008
- 2008-04-11 DE DE102008018656A patent/DE102008018656B9/de not_active Expired - Fee Related
-
2009
- 2009-03-26 EP EP09156326.2A patent/EP2108467B1/fr not_active Not-in-force
- 2009-04-06 US US12/418,957 patent/US8240184B2/en not_active Expired - Fee Related
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB808335A (en) | 1956-07-27 | 1959-02-04 | Opel Adam Ag | Improvements relating to the deep drawing of metal sheets |
DE19742818A1 (de) | 1997-09-27 | 1999-04-01 | Volkswagen Ag | Platine für ein Strukturbauteil, Strukturbauteil und Verfahren zur Herstellung eines Strukturbauteiles für Kraftfahrzeuge |
WO2005053871A1 (fr) | 2003-12-06 | 2005-06-16 | Daimlerchrysler Ag | Procede pour produire un profile creux |
EP1708832B1 (fr) | 2003-12-06 | 2007-09-05 | DaimlerChrysler AG | Procede pour produire un profile creux |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2010094538A1 (fr) * | 2009-02-19 | 2010-08-26 | Thyssenkrupp Steel Europe Ag | Procédé de fabrication d'une pièce métallique trempée à la presse |
CN102317001B (zh) * | 2009-02-19 | 2016-02-24 | 蒂森克虏伯钢铁欧洲股份公司 | 用于制造压力淬火的金属部件的方法 |
CN102802830A (zh) * | 2009-10-30 | 2012-11-28 | 本田技研工业株式会社 | 废料形状保持 |
CN102802830B (zh) * | 2009-10-30 | 2015-01-14 | 本田技研工业株式会社 | 用于冲压金属板部件的金属板冲压装置以及相关方法 |
Also Published As
Publication number | Publication date |
---|---|
DE102008018656B9 (de) | 2009-07-09 |
EP2108467B1 (fr) | 2014-11-26 |
US8240184B2 (en) | 2012-08-14 |
EP2108467A3 (fr) | 2013-04-03 |
DE102008018656B3 (de) | 2009-03-12 |
US20090255317A1 (en) | 2009-10-15 |
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