EP1658148B2 - Procede de formage de toles - Google Patents

Procede de formage de toles Download PDF

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Publication number
EP1658148B2
EP1658148B2 EP04801928.5A EP04801928A EP1658148B2 EP 1658148 B2 EP1658148 B2 EP 1658148B2 EP 04801928 A EP04801928 A EP 04801928A EP 1658148 B2 EP1658148 B2 EP 1658148B2
Authority
EP
European Patent Office
Prior art keywords
reinforcement
base plate
another
forming
plate
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
EP04801928.5A
Other languages
German (de)
English (en)
Other versions
EP1658148B1 (fr
EP1658148A1 (fr
Inventor
Heiko Engels
Hubertus Steffens
Achim Braun
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.)
Metalsa Automotive GmbH
Original Assignee
Metalsa Automotive GmbH
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
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Application filed by Metalsa Automotive GmbH filed Critical Metalsa Automotive GmbH
Publication of EP1658148A1 publication Critical patent/EP1658148A1/fr
Publication of EP1658148B1 publication Critical patent/EP1658148B1/fr
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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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/02—Stamping using rigid devices or tools
    • 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
    • B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
    • B21D35/005—Processes combined with methods covered by groups B21D1/00 - B21D31/00 characterized by the material of the blank or the workpiece
    • B21D35/007—Layered blanks
    • 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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/03—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders of sheet metal otherwise than by folding
    • 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

Definitions

  • the invention relates to a method for hot forging of sheets, in particular circuit boards, in a forming tool, applied to a motherboard for partial reinforcement one or more reinforcing boards, the motherboard and the at least one reinforcing board fixed to each other and / or aligned by suitable means to each other and the motherboard and forming the at least one reinforcing board together, wherein a surface coating for forming a bonding layer is applied to the at least one reinforcing board prior to the hot forging operation, wherein the surface coating melts during the hot forging and forms a bond between the motherboard and the at least one reinforcing board.
  • the DE 43 07 563 C2 suggests for the field of deep drawing of sheet metal, therefore, deep-draw base plate and reinforcing plate together or form-punching.
  • the one or more reinforcing plates are attached to the base plate before the common deep-drawing or punching and connected inextricably after deep-drawing or punching with the base plate.
  • this document discloses the provision of corrosion protection measures in the field of superimposed sheets.
  • the provision of coated or galvanized steel sheets or the interposition of a plastic or metal foil or an adhesive layer see also DE 101 20 121 A1 ) called.
  • thermoforming As a thermoforming as Kaltverformvorgang the tools heavily loaded when doubling the deep-drawing sheets, is in the generic DE 100 49 660 A1 proposed to reform a patched composite sheet of a base plate and reinforcing sheet (s) in the hot state at 800 - 850 ° C in a desired shape and to cool defined on the forming tool with mechanical maintenance of the forming state.
  • the contact surface of at least one of the plates is provided with a brazing blanket area before being applied to the base plate. After the soldering and before heating, a connection point between the reinforcement plate and the base plate is set to ensure a clear positioning of the sheets together.
  • the patched composite sheet is heated to a temperature above the forming temperature of the material of the sheets, formed in the hot state into the desired shape and then cooled defined under mechanical fixation in the forming state in the closed held forming tool and / or fixing and cutting tool.
  • the DE 198 26 290 A1 discloses a method of manufacturing partial double sheet or multiple sheet metal structures formed from a base sheet and one or more reinforcing sheets which may be deep drawn, bent or die-stamped together. From the DE 199 57 910 A1 For example, a method is known for roll profiling two or more sheets that are brought together between oppositely rotating rolls. In the in the DE 199 19 783 A1 described method is a bonding of at least two sheets by a partial cross-linking of an adhesive before forming. A complete cross-linking of the adhesive takes place only after the forming.
  • the EP 0 857 526 A1 relates to a forming part with a partially formed multiple sheet metal structure, wherein the reinforcing plates are welded overlapping each other with the base sheet.
  • the sheet forming processes discussed above provide either no hot working and thus high and partially differential stress on the thermoforming tool, or hot working, which, however, is cumbersome when applied in paste form due to the use of blanket brazing application. precise metering and positioning when sprayed on, sprinkled or applied in the form of chips or applied in the form of a solder foil is, where in such a prior accurate blank is required.
  • the provision of a pocket or a cavity for a glass intermediate element or a glass mat has the disadvantage that on the one hand such a cavity must be created, on the other hand, the glass mat, if it does not have the dimensions of the reinforcing plate, the ingress of moisture at their edges allows and thus corrosion of the sheets used.
  • the present invention is an object of the invention to provide a method for hot forming of sheets or boards, which does not have the disadvantages mentioned above and allows the production of moldings in lightweight construction with provided for a partial higher stress reinforcement, with respect to the above Technique for even more effective corrosion protection in conjunction with a secure connection of motherboard and reinforcement board (s) is to be made possible.
  • the object is achieved for a method of the type mentioned above in that the connecting layer consists of a coating applied to the motherboard and / or the at least one reinforcing board adhesive and the warm forging at temperatures between 500 ° C and 730 ° C, in particular 500 ° C and 700 ° C, in particular 500 ° C and 650 ° C.
  • This provides a process for hot forging sheet metal, particularly blanks, which combines the advantages of co-forming blanks to be joined and hot forging with those of optimum sealing and bonding of the blanks. Due to the use of a common hot forging of motherboard and reinforcing board (s), very good manufacturing accuracy and avoidance of gaps between the reshaped boards can be achieved in combination with the advantage of an arbitrarily high degree of forming due to the use of hot forging as opposed to cold forming, for example like deep drawing. As a result, in particular the press tools used can be spared, even when using almost any material thicknesses of boards and their combination with each other. In warm forging, lower temperatures are used than in hot forming, which generally does not harden the material.
  • high-strength materials can be used which already have high-strength properties.
  • a surface coating for forming a connecting layer is applied to the at least one reinforcing plate, wherein the surface coating is applied to the at least one reinforcing plate before the hot forging process, wherein the surface coating melts during forming and forms a connection between the motherboard and the at least one reinforcing plate ,
  • the reinforcement board (s) By coating the reinforcement board (s), an optimal and uniform connection with the motherboard is possible up to the edge of the reinforcement board and, if necessary, of individual reinforcement boards. In this way, a full-surface connection of the boards can be achieved up to the edge region of the reinforcing board (s) even with very complex shapes.
  • An additional application of a sealant bead in the edge region of the at least one reinforcing plate is therefore no longer necessary, but may, if desired, nevertheless be provided.
  • a silicone in particular epoxy resin adhesive, polyurethane adhesive, hot melt adhesive, PUR dispersion adhesive, etc.
  • the coating can be done, for example, by rolling, dipping, printing, gumming, etc.
  • the tie layer may completely cover the surface of the reinforcing board (s). However, it can also be formed as a pattern or mask on the surface of the at least one reinforcing plate and / or the motherboard, in particular surrounding the edge region of the reinforcing board substantially gapless. In some cases, it is not absolutely necessary to provide the entire surface of the reinforcing board (s) with the respective bonding layer, since a connection of the molded boards is already supported by their shaping and sealing only in the edge region of the reinforcing board (s) for corrosion protection appropriate is. In the choice of the pattern or the mask, this (s) is advantageously matched to the forces acting on the finished molding during operation, so that unintentional release of the boards can be avoided from each other.
  • the connecting layer consists of a coating applied to the motherboard and / or the at least one reinforcing board adhesive, which melts during the forming process and forms a firm connection between motherboard and reinforcing board (s) during cooling.
  • the adhesive melts and forms an adhesive coating on the reinforcing sheet (s).
  • Corrosion protection is possible as well as a firm connection of the molded boards.
  • an adhesive will be used as the tie-layer. This can melt during the forming process, harden on cooling and form a firm connection between the motherboard and the at least one reinforcing board.
  • a bonding layer is provided between a molded motherboard and at least one reinforcing board in the form of an adhesive and / or molten and solidified glass material which interconnects the motherboard and the at least one reinforcing board and / or multiple reinforcing boards.
  • a reinforcing board is arranged on the motherboard and fixed and / or aligned by suitable means to this or several reinforcing boards next to and / or one above the other on the motherboard arranged and fixed and / or aligned by suitable means to each other and / or to the motherboard.
  • Particularly preferred is provided with the provision of only one gain board on the motherboard and fixed and / or aligned by suitable means to this or providing several reinforcing boards these are overlapping and / or abutting each other in a partial area and / or spaced from each other on the motherboard fixed and / or aligned with each other by suitable means.
  • stud bolts or the like may be particularly preferably provided in the forming tool or the forming press.
  • the reinforcing boards are connected to each other abutting each other before the forming process, in particular by attaching a weld or other connecting seam.
  • this butt seam can be leveled during forming, so that no uneven transition points remain.
  • the boards are fixed to each other before the warm forging and / or after the warm forging by additional compounds, in particular by welding, riveting, clinching or another connection method.
  • additional compounds in particular by welding, riveting, clinching or another connection method.
  • the unique position of the reinforcing plate (s) applied selectively at certain points on the surface of the motherboard is fixed, so that it does not substantially change during the forming, especially before forming.
  • a fixation proves to be advantageous in itself otherwise by shearing off possibly easily releasing connections between motherboard and reinforcement board (s), since especially an additional punctiform connection can counteract unwanted shearing.
  • the shaped reinforcing boards serve e.g. as internal reinforcement, the molded motherboard as external reinforcement of a vehicle B-pillar.
  • FIG. 1 shows the first processing step of an alternative method for hot forging of blanks.
  • the reinforcing boards 2, 3, 4 are initially provided with a surface coating 20, 30, 40.
  • This surface coating consists of an adhesive which melts under the influence of heat and at the latest on cooling of the molded blanks with these adhesively bonding adhesive.
  • the surface 10 of the motherboard and / or both the surface of the motherboard and the reinforcing boards can be provided with a surface coating which also allows connection to the reinforcing boards when heated, eg in the manner of a multi-component adhesive.
  • the reinforcing plates 2, 3, 4 are then placed on the motherboard 1 and fixed in the case shown in FIG. 7 at various points, for example by welding points 5.
  • This resulting unit of a composite board 60 is subsequently introduced into a furnace 7, such as FIG. 2 can be seen.
  • the composite board is heated to a suitable temperature for warm forging and forwarded to the forming press 8 ( FIG. 3 ). Therein, the warm forging takes place with corresponding temperatures.
  • the surface coating of the boards melts and bonds to the respective adjacent board surface. Therefore, a bonding layer 12 is formed directly during the forming, which allows a dense and firmly connected unit of the molded blanks.
  • the bonding layer 12 is cooled and thereby hardens. Any gaps between motherboard and reinforcing boards remaining or remaining during molding are filled by the bonding layer, thereby creating a dense corrosion prevention unit.
  • the joints already existing and remaining during hot forging in the form of e.g.
  • Welding points even more or these may be again provided for additional connection of the molded boards to each other. In principle, however, it is already possible to ensure a sufficiently firm hold of the molded blanks on one another by the combination of the fixing connecting points applied before forming and the connecting layer.
  • the forming press 8 as in FIG. 3 is shown, a finished molded part can be removed, which can be used as a structural part in vehicle construction after a customarily subsequent to the forming cutting.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Standing Axle, Rod, Or Tube Structures Coupled By Welding, Adhesion, Or Deposition (AREA)

Claims (8)

  1. Procédé de formage tempéré, dans un outil de formage (8), de tôles se présentant notamment comme des platines (1, 2, 3, 4), procédé dans lequel une ou plusieurs platine(s) de renforcement (2, 3, 4) est (sont) placée(s) sur une platine de base (1), en vue du renforcement partiel, la platine de base (1) et la platine de renforcement (2, 3, 4) prévue au minimum sont assujetties l'une à l'autre, et/ou orientées mutuellement à l'aide de moyens adéquats, et ladite platine de base (1) et ladite platine de renforcement (2, 3, 4) prévue au minimum sont mises en forme conjointement,
    sachant
    que préalablement à l'opération de formage tempéré, un revêtement de surface (20, 30, 40) est déposé sur la platine de renforcement (2, 3, 4) prévue au minimum, afin de former une couche de solidarisation ou en tant que couche de ce type, sachant que ledit revêtement de surface fond au cours du formage tempéré, et instaure une liaison entre la platine de base (1) et la platine de renforcement (2, 3, 4) prévue au minimum,
    caractérisé par le fait que
    la couche de solidarisation est constituée d'un adhésif, en tant que revêtement, sur la platine de base (1) et/ou sur la platine de renforcement (2, 3, 4) prévue au minimum, et
    le formage tempéré a lieu à des températures comprises entre 500 et 730°C, en particulier entre 500 et 700°C, notamment entre 500 et 650°C.
  2. Procédé selon la revendication 1,
    caractérisé par le fait que
    l'adhésif est un adhésif approprié pour des températures élevées ou très élevées.
  3. Procédé selon l'une des revendications 1 ou 2,
    caractérisé par le fait que
    la couche de solidarisation est conçue sous la forme d'un motif ou d'un cache, sur la surface de la platine de renforcement (2, 3, 4) prévue au minimum et/ou de la platine de base (1), en entourant notamment la région marginale de ladite platine de renforcement.
  4. Procédé selon l'une des revendications précédentes,
    caractérisé par le fait
    qu'une platine de renforcement est placée et consignée à demeure sur la platine de base (1), et/ou est orientée vis-à-vis de cette dernière à l'aide de moyens adéquats ; ou par le fait que plusieurs platines de renforcement (2, 3, 4) sont placées et consignées à demeure sur la platine de base (1), en juxtaposition et/ou en superposition, et/ou sont orientées, à l'aide de moyens adéquats, les unes vis-à-vis des autres et/ou vis-à-vis de ladite platine de base (1).
  5. Procédé selon l'une des revendications précédentes,
    caractérisé par le fait
    qu'une platine de renforcement est placée et consignée à demeure sur la platine de base (1), et/ou est orientée vis-à-vis de cette dernière à l'aide de moyens adéquats ; ou par le fait que plusieurs platines de renforcement (2, 3, 4) sont consignées à demeure sur la platine de base (1) avec chevauchement réciproque dans une région partielle et/ou en butée mutuelle et/ou à distance les unes des autres, et/ou sont orientées vis-à-vis de ladite platine à l'aide de moyens adéquats.
  6. Procédé selon la revendication 5,
    caractérisé par le fait que
    plusieurs platines de renforcement sont reliées les unes aux autres en butée mutuelle, préalablement à l'opération de formage, en particulier par dépôt d'un cordon de soudure ou d'un autre joint de solidarisation.
  7. Procédé selon l'une des revendications précédentes,
    caractérisé par le fait que
    la platine de base (1), et la (les) platine(s) de renforcement (2, 3, 4), présente(nt) des épaisseurs de matériau différentes.
  8. Procédé selon l'une des revendications précédentes,
    caractérisé par le fait que,
    avant le formage tempéré et/ou après le formage tempéré, les platines (1, 2, 3, 4) sont assujetties les unes aux autres par des solidarisations additionnelles, notamment par soudage, par rivetage, par assemblage traversant ou par un autre procédé de liaison.
EP04801928.5A 2003-08-25 2004-08-23 Procede de formage de toles Expired - Lifetime EP1658148B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10339350A DE10339350B4 (de) 2003-08-25 2003-08-25 Verfahren zum Halbwarm-oder Warmumformen von Blechen
PCT/EP2004/009389 WO2005021177A1 (fr) 2003-08-25 2004-08-23 Procede de formage de toles

Publications (3)

Publication Number Publication Date
EP1658148A1 EP1658148A1 (fr) 2006-05-24
EP1658148B1 EP1658148B1 (fr) 2008-09-10
EP1658148B2 true EP1658148B2 (fr) 2015-10-28

Family

ID=34258235

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04801928.5A Expired - Lifetime EP1658148B2 (fr) 2003-08-25 2004-08-23 Procede de formage de toles

Country Status (3)

Country Link
EP (1) EP1658148B2 (fr)
DE (2) DE10339350B4 (fr)
WO (1) WO2005021177A1 (fr)

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DE102006020623B4 (de) * 2006-05-02 2010-04-01 Benteler Automobiltechnik Gmbh Verfahren zum Herstellen von Bauteilen aus tailored blanks
DE102006047805A1 (de) * 2006-10-06 2008-04-10 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Kraftfahrzeugbauteils
DE102006049014B4 (de) * 2006-10-13 2019-07-11 Thyssenkrupp Steel Europe Ag Verbundblech mit hohem Energieabsorptionsvermögen, Verfahren zu dessen Herstellung und Bauteil
WO2008055570A1 (fr) * 2006-11-07 2008-05-15 Thyssenkrupp Drauz Nothelfer Gmbh Procédé et installation de fabrication de flans de tôle renforcés
DE102009052210B4 (de) * 2009-11-06 2012-08-16 Voestalpine Automotive Gmbh Verfahren zum Herstellen von Bauteilen mit Bereichen unterschiedlicher Duktilität
DE202011000731U1 (de) 2011-03-30 2011-06-01 Schmitz Cargobull AG, 48341 Profilträger für ein Fahrzeugchassis und Nutzfahrzeugchassis mit einem solchen Profilträger
DE102012016926A1 (de) 2012-08-27 2014-02-27 Volkswagen Aktiengesellschaft Umformverfahren und ein nach diesem Umformverfahren hergestelltes Formteil
DE102013010919B4 (de) 2013-06-29 2018-10-18 Volkswagen Aktiengesellschaft Verfahren zur Bearbeitung eines Werkstückes sowie ein mit diesem Verfahren hergestelltes Formteil
JP5959558B2 (ja) * 2014-03-13 2016-08-02 アイシン高丘株式会社 複合構造体及びその製造方法
DE102014215365A1 (de) * 2014-08-05 2016-02-11 Bayerische Motoren Werke Aktiengesellschaft Verfahren zur Herstellung von warmumgeformten Bauteilen
DE102015209772B4 (de) * 2015-05-28 2026-03-26 Volkswagen Aktiengesellschaft Fahrzeugtür mit einem Türaufprallträger
DE102015122410A1 (de) * 2015-12-21 2017-06-22 GEDIA Gebrüder Dingerkus GmbH Verfahren zur Herstellung von Bauteilen mit veredelten Bereichen vorwiegend aus Metall sowie ein Bauteil mit veredelten Bereichen
DE102016110568A1 (de) * 2016-06-08 2017-12-14 Wemhöner Surface Technologies GmbH & Co. KG Verfahren und Vorrichtung zum Fixieren übereinander positionierter Schichten flächigen Materials
DE102017205236B4 (de) 2017-03-28 2018-11-29 Audi Ag Verfahren zum Herstellen einer Bauteilvariante eines umgeformten und mit einem Verstärkungspatch verstärkten Strukturbauteils
CN117444233A (zh) * 2023-09-27 2024-01-26 中国航空工业集团公司沈阳飞机设计研究所 一种薄壁结构增材成形连接变形控制系统

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EP0857526A1 (fr) † 1997-02-08 1998-08-12 Volkswagen Aktiengesellschaft Pièce de formage, au moins une partie de laquelle ayant une structure multicouche
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EP0857526A1 (fr) † 1997-02-08 1998-08-12 Volkswagen Aktiengesellschaft Pièce de formage, au moins une partie de laquelle ayant une structure multicouche
DE19826290A1 (de) † 1998-02-25 1999-08-26 Salzgitter Ag Verfahren zum Fertigen von partiellen Doppelblech- oder Mehrfachblechstrukturen
DE19919783A1 (de) † 1999-04-30 2000-11-09 Audi Ag Herstellungsverfahren für ein durch Tiefziehen umgeformtes, wenigstens zweilagiges Blechverbundteil
DE19957910A1 (de) † 1999-12-01 2001-06-13 Salzgitter Ag Verfahren zum Herstellen eines Formbauteils ungleichmäßiger Dicke

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LANGE, KURT: "Umformtechnik- Handbuch für Industrie und Wissenschaft", 1984, SPRINGER VERLAG, pages: 516 - 517 †

Also Published As

Publication number Publication date
EP1658148B1 (fr) 2008-09-10
DE502004008042D1 (de) 2008-10-23
DE10339350A1 (de) 2005-04-07
DE10339350B4 (de) 2011-06-30
EP1658148A1 (fr) 2006-05-24
WO2005021177A1 (fr) 2005-03-10

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