EP0946311B1 - Procede pour produire une piece faconnee en tole par formage - Google Patents

Procede pour produire une piece faconnee en tole par formage Download PDF

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Publication number
EP0946311B1
EP0946311B1 EP97954916A EP97954916A EP0946311B1 EP 0946311 B1 EP0946311 B1 EP 0946311B1 EP 97954916 A EP97954916 A EP 97954916A EP 97954916 A EP97954916 A EP 97954916A EP 0946311 B1 EP0946311 B1 EP 0946311B1
Authority
EP
European Patent Office
Prior art keywords
sheet
sheet metal
strength
metal flat
metal
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
EP97954916A
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German (de)
English (en)
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EP0946311A1 (fr
Inventor
Gerhard Schiessl
Hans-Wilhelm Bergmann
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.)
Audi AG
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Audi AG
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Filing date
Publication date
Application filed by Audi AG filed Critical Audi AG
Publication of EP0946311A1 publication Critical patent/EP0946311A1/fr
Application granted granted Critical
Publication of EP0946311B1 publication Critical patent/EP0946311B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D22/20—Deep-drawing
    • 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
    • B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
    • 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
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/62—Quenching devices
    • C21D1/673—Quenching devices for die quenching
    • 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
    • C21D2221/00—Treating localised areas of an article
    • 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
    • C21D2221/00—Treating localised areas of an article
    • C21D2221/02—Edge parts

Definitions

  • the invention relates to a method for producing a according to the strength or rigidity requirements sheet metal part having different material thicknesses Deep drawing.
  • the generic manufacturing process serves in particular Lightweight and takes place in a special way in the manufacture of Vehicle bodies application. While it was common until now, a sheet metal part in its thickness according to the area / section of the highest In the meantime, one has to interpret mechanical requirements passed, regarding the material thicknesses with regard to the local differentiate between different stiffness requirements.
  • a corresponding method is, for example, in DE 43 07 563 C2 described.
  • the patent explains a method of manufacturing one Sheet metal structure part, consisting of a multiple sheet metal structure a base plate and in some cases an associated one Reinforcing plate or several reinforcing plates, wherein the base plate and the reinforcement plate or the reinforcement plates be deep-drawn together.
  • the reinforcement plate or the reinforcement plates before deep drawing together at least partially attached to the base plate and after deep drawing permanently connected to the base plate.
  • EP 0 486 093 B1 describes a method in which the amplification of Areas of a molded part by means of a reinforcing structural member takes place, which is deformed separately by a plate body to be covered and only then with the plate body, which is also fully formed is connected. This is the process of shaping complicated and expensive.
  • the invention has for its object a further method for Manufacture one according to the strength or Stiffness requirements having different material thicknesses Provide molded sheet metal part, which is inexpensive and in terms of Shaping process is easily carried out.
  • the solution according to the invention is in accordance with the process features to see claim 1.
  • Such a way manufactured sheet metal part requires only a relatively small additional manufacturing and logistical effort.
  • the sheet metal parts are characterized by a high surface quality and smooth transitions between areas of different material thicknesses.
  • DE 44 25 033 A1 also describes a method and a method Device for pressure forming workpieces described, wherein a Workpiece clamped in a clamping device and by at least one Press tool is formed.
  • a Workpiece clamped in a clamping device and by at least one Press tool is formed.
  • One is in particular Laser beam device is provided through which the workpiece with a Laser beam is applied and heated to increase the yield stress lower and improve the formability.
  • the Forming temperature is adaptable to different materials and adjustable. This can cause local heating of the workpiece in the Areas of high degrees of deformation. With various Embodiments there is also the possibility of the wall thickness of the To reduce the workpiece without going into why such a reduction should be aimed for.
  • DE 43 16 829 A1 also describes a method for Material processing with diode radiation described, one Adjustment of the beam profile to the machining process can take place.
  • Possible applications are given: forming and bending one Workpiece, laser flame cutting, welding of workpieces, Removal of impurities or coatings on workpieces, local warming to support a exciting Workpiece processing and soldering of workpieces.
  • a local temperature change occurs during or immediately before Forming the sheet metal to form a sheet metal part z.
  • the sheet is formed in two steps. After a first one Deformation with a small degree of deformation follows Final shaping - according to the properties of the sheet to be deformed were changed accordingly by a local temperature increase - with a high degree of deformation especially in the areas where a Material thickness reduction is sought.
  • the aim of this variant is to change the yield point locally Heat after one of the last rolling steps, but before the Sheet finishing is introduced into a coil or sheet metal.
  • steels ZStE 180 BH (bake hardening) and DP 500 in a temperature range between 200 ° C to 400 ° C an increase in Yield strengths can be determined by approx. 25% based on the initial values. While the bake hardening steel has no more Strength changes occur at higher temperatures, the fall Values for the dual-phase steel from temperatures above 550 ° C again by up to 25% of the highest yield strength values.
  • the aim of this variant is to change the yield point locally Heat that is immediately before or during the forming into the (black) Sheet metal is introduced.
  • the temperature is - around a local fluidity to effect - preferably choose between 100 ° C and 200 ° C, with a strength reduction of up to 8% compared to the initial state is expected.
  • the moderate temperatures required in this case can can be tolerated by the forming tool.
  • temperatures in the dual-phase steel are around 200 ° C or around which needs 500 ° C or more to make sense in certain areas To achieve an increase in local elongation.
  • At temperatures around 200 ° C is a strength reduction of at least 10% from 550 ° C by at least Make up 20% of the initial state.
  • TRIP 800 and CP 1000 require one Temperature of approx. 500 ° C in order to achieve a sensible local expansion. This leads to a reduction in strength of approx. 22% or 28% compared to the initial state.
  • Variant B is definitely for the bake hardening steel and for the Dual-phase steel can be used to a limited extent.
  • TRIP 800 and CP 1000 which are used to lower the strength values temperatures variant B is less suitable than 500 ° C.
  • the necessities Temperatures are too high for use in the forming tool.
  • As a heat input source (Temperature range: approx. 100 ° C to 250 ° C) is the following imaginable: oil bath, hair dryer.
  • variant C The goal of variant C is to form the sheet in two steps. After the first forming step, you can proceed as in variant B.
  • a practical implementation can consist in that the sheet material after one of the last rolling steps by local heating in one Furnace with different heating zones by means of a burner arrangement, inductive heating or by high-energy radiation sources locally in the Yield point is lowered.
  • markings on the Surface of the sheet can be the areas where the strength was lowered, can be recognized by the deep drawing press or presses, so that appropriate positioning of the sheet in the forming tool becomes possible.
  • a practical version of variants B and C can consist of that the sheet metal material by local heating immediately before Forming in a furnace with different heating zones using a Burner arrangement inductive or by high-energy radiation sources locally in the Yield point is changed, or by this during the Forming happens through the action of appropriate heat sources.
  • FIG. 1a shows a sheet metal plate 1 with an initial sheet thickness d 0 and with areas 1.1, 1.2, 1.3 that have been heat-treated with different intensities, while FIG. from which it can be seen that regions with different sheet thicknesses d1, d2 and d3 have also arisen.
  • FIGS. 2a and 2b show two examples using FIGS. 2a and 2b Yield strengths with different hardening behavior, as shown by the corresponding heat treatment in different areas of the Sheet 1 occur. Areas where both material areas can flow plastically are hatched. This is illustrated using ⁇ / ⁇ diagrams.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Heat Treatment Of Sheet Steel (AREA)

Claims (6)

  1. Procédé de fabrication d'une pièce façonnée en tôle, obtenue par étirage profond, présentant des épaisseurs de matériaux différentes, de manière correspondante aux exigences imposées en matière de résistance ou de rigidité, caractérisé en ce qu'un flan en tôle (1) est chauffé dans la zone du formage, où le chauffage n'est effectué que partiellement ou bien avec une intensité différente, dans le but d'obtenir un coefficient de dilatation du matériau différent sur l'étendue de la surface du flan en tôle (1) et, ainsi, d'obtenir une dilatation de valeur différente, avec une réduction induite de l'épaisseur du matériau du flan en tôle (1) pendant l'étirage profond.
  2. Procédé selon la revendication 1, caractérisé par l'utilisation d'un flan en tôle (1) constitué d'au moins deux tôles partielles, assemblées, constituées de matériaux à base d'acier différents.
  3. Procédé selon la revendication 1, caractérisé par l'utilisation d'un flan en tôle (1) constitué d'au moins deux tôles partielles, assemblées, ayant des épaisseurs de tôles différentes.
  4. Procédé selon la revendication 1, caractérisé en ce que le formage du flan en tôle (1) s'effectue en au moins deux étapes.
  5. Dispositif selon la revendication 1, caractérisé en ce que le chauffage s'effectue entre deux étapes de reformage.
  6. Procédé selon la revendication 1, caractérisé en ce que le chauffage s'effectue après la dernière étape de laminage, lors de la fabrication des tôles, et avant la continuation de la transformation du matériau de la tôle.
EP97954916A 1996-12-20 1997-12-15 Procede pour produire une piece faconnee en tole par formage Expired - Lifetime EP0946311B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19653543A DE19653543A1 (de) 1996-12-20 1996-12-20 Verfahren zum Herstellen eines Blechformteiles durch Tiefziehen
DE19653543 1996-12-20
PCT/EP1997/007029 WO1998028097A1 (fr) 1996-12-20 1997-12-15 Procede pour produire une piece façonnee en tole par formage

Publications (2)

Publication Number Publication Date
EP0946311A1 EP0946311A1 (fr) 1999-10-06
EP0946311B1 true EP0946311B1 (fr) 2000-10-25

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP97954916A Expired - Lifetime EP0946311B1 (fr) 1996-12-20 1997-12-15 Procede pour produire une piece faconnee en tole par formage

Country Status (6)

Country Link
US (1) US6185977B1 (fr)
EP (1) EP0946311B1 (fr)
JP (1) JP2001506543A (fr)
DE (2) DE19653543A1 (fr)
ES (1) ES2151299T3 (fr)
WO (1) WO1998028097A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013010919A1 (de) * 2013-06-29 2014-12-31 Volkswagen Aktiengesellschaft Verfahren zur Bearbeitung eines Werkstückes sowie ein mit diesem Verfahren hergestelltes Formteil
DE102021132658A1 (de) 2021-12-10 2023-06-15 Schaeffler Technologies AG & Co. KG Bipolarplatte und Verfahren zum Prägen einer Kanalstruktur

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EP1296798B1 (fr) 2000-07-06 2009-02-18 Trico Products Company Procede et appareil de fabrication souple d'un produit legerement incurve a partir d'un stock de depart
JP2002241835A (ja) * 2001-02-20 2002-08-28 Aisin Takaoka Ltd ワークの部分強化方法
FR2837500B1 (fr) * 2002-03-21 2004-12-03 Usinor Tole ecrouie en acier calme a l'aluminium et procede de fabrication d'un emballage a partir de cette tole
DE10302458B4 (de) * 2003-01-23 2006-10-26 Schuler Held Lasertechnik Gmbh & Co. Kg Maschine und Verfahren zur Massivumformung
US7523850B2 (en) * 2003-04-07 2009-04-28 Luxfer Group Limited Method of forming and blank therefor
DE102004005568A1 (de) * 2004-02-05 2005-09-08 Daimlerchrysler Ag Verbindungsbereich auf einem Bauteil, sowie Verfahren und Werkzeug zu seiner Herstellung
DE102004007071B4 (de) * 2004-02-13 2006-01-05 Audi Ag Verfahren zur Herstellung eines Bauteils durch Umformen einer Platine und Vorrichtung zur Durchführung des Verfahrens
DE102004026762A1 (de) * 2004-06-02 2006-02-09 Bayerische Motoren Werke Ag Umform- und/oder Trennwerkzeug
DE102004029458B4 (de) * 2004-06-18 2017-02-02 Hfs Hotforming Solutions Gmbh Bauteil einer Fahrzeugkarosserie und Verfahren zu seiner Herstellung
DE102004037206A1 (de) * 2004-07-30 2006-03-23 Muhr Und Bender Kg Fahrzeugkarosserie
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JP4563469B2 (ja) * 2008-05-16 2010-10-13 トヨタ自動車株式会社 プレス加工方法及びプレス加工品
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JP5416498B2 (ja) * 2009-07-23 2014-02-12 本田技研工業株式会社 テーラードブランク板の成形方法及びその装置
DE102010007955B4 (de) * 2010-02-12 2014-08-21 Johnson Controls Gmbh Verfahren zur Herstellung eines Bauteils sowie Vorrichtung
DE102011086813A1 (de) * 2011-11-22 2013-05-23 Ford Global Technologies, Llc Einstückiges Blechbauteil für ein Fahrzeug
DE102012009744A1 (de) * 2012-03-15 2013-09-19 Johnson Controls Gmbh Struktur eines Fahrzeugsitzteils
DE102013008853A1 (de) * 2013-05-23 2014-11-27 Linde Aktiengesellschaft Anlage und Verfahren zum Warmumformen von Platinen
JP6194526B2 (ja) * 2013-06-05 2017-09-13 高周波熱錬株式会社 板状ワークの加熱方法及び加熱装置並びにホットプレス成形方法
DE102014201611A1 (de) * 2014-01-30 2015-07-30 Volkswagen Aktiengesellschaft Bidirektionale Tailored Rolled Platine
DE102015004696A1 (de) 2015-04-11 2015-12-03 Daimler Ag Verfahren zur Herstellung eines Blechbauteils
KR20190039666A (ko) * 2016-08-09 2019-04-15 오토테크 엔지니어링 에이.아이.이. 블랭크들의 센터링 및 선택적 가열
EP3559283A1 (fr) * 2016-12-22 2019-10-30 Autotech Engineering S.L. Procédé de chauffage d'une pièce brute et système de chauffage
DE102017207358B4 (de) 2017-05-02 2023-07-06 Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Coburg Verfahren zum Herstellen eines Kinematikteils einer Verstellkinematik eines Fahrzeugsitzes
KR102245033B1 (ko) * 2017-12-14 2021-04-27 타타 스틸 리미티드 가공물의 항복강도를 향상시키는 방법, 장치, 및 그 가공물
WO2020049344A1 (fr) * 2018-09-07 2020-03-12 Arcelormittal Procédé d'amélioration de l'aptitude au formage d'ébauches d'acier
CN113510187B (zh) * 2021-04-29 2023-06-23 中国航发北京航空材料研究院 一种提高金属薄壁型材下陷成形质量的方法及其装置
CN114346070A (zh) * 2021-12-29 2022-04-15 宁波信泰机械有限公司 一种汽车立柱内板的分区成型方法
DE102022131931A1 (de) 2022-12-02 2024-06-13 Audi Aktiengesellschaft Verfahren zum Herstellen eines Bauteils

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013010919A1 (de) * 2013-06-29 2014-12-31 Volkswagen Aktiengesellschaft Verfahren zur Bearbeitung eines Werkstückes sowie ein mit diesem Verfahren hergestelltes Formteil
DE102013010919B4 (de) * 2013-06-29 2018-10-18 Volkswagen Aktiengesellschaft Verfahren zur Bearbeitung eines Werkstückes sowie ein mit diesem Verfahren hergestelltes Formteil
DE102021132658A1 (de) 2021-12-10 2023-06-15 Schaeffler Technologies AG & Co. KG Bipolarplatte und Verfahren zum Prägen einer Kanalstruktur
WO2023104239A1 (fr) 2021-12-10 2023-06-15 Schaeffler Technologies AG & Co. KG Plaque bipolaire et procédé de gaufrage d'une structure de canal

Also Published As

Publication number Publication date
EP0946311A1 (fr) 1999-10-06
JP2001506543A (ja) 2001-05-22
WO1998028097A1 (fr) 1998-07-02
US6185977B1 (en) 2001-02-13
DE59702545D1 (de) 2000-11-30
ES2151299T3 (es) 2000-12-16
DE19653543A1 (de) 1998-06-25

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