WO2008095705A1 - Procédé de production d'un composant d'un châssis et/ou d'une carrosserie - Google Patents

Procédé de production d'un composant d'un châssis et/ou d'une carrosserie Download PDF

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Publication number
WO2008095705A1
WO2008095705A1 PCT/EP2008/000940 EP2008000940W WO2008095705A1 WO 2008095705 A1 WO2008095705 A1 WO 2008095705A1 EP 2008000940 W EP2008000940 W EP 2008000940W WO 2008095705 A1 WO2008095705 A1 WO 2008095705A1
Authority
WO
WIPO (PCT)
Prior art keywords
component
stress
components
partially
inductively
Prior art date
Application number
PCT/EP2008/000940
Other languages
German (de)
English (en)
Inventor
Dieter Hahn
Gustav Hanisch
Falko Thomann
Fouad Baroudi
Christian Martin Erdmann
Reiner Schmid
Original Assignee
Daimler Ag
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 Daimler Ag filed Critical Daimler Ag
Publication of WO2008095705A1 publication Critical patent/WO2008095705A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D21/00—Understructures, i.e. chassis frame on which a vehicle body may be mounted
    • B62D21/11—Understructures, i.e. chassis frame on which a vehicle body may be mounted with resilient means for suspension, e.g. of wheels or engine; sub-frames for mounting engine or suspensions
    • 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
    • C21D1/26—Methods of annealing
    • C21D1/30—Stress-relieving
    • 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
    • C21D1/34—Methods of heating
    • C21D1/42—Induction heating
    • 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
    • C21D7/13—Modifying the physical properties of iron or steel by deformation by hot working
    • 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
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the invention relates to a method for producing a curved chassis and / or body component according to the term O berbegriff of claim 1, as it appears, for example. From DE 101 20 934 Al known.
  • a method for producing a chassis and / or body component such as. Front and / or rear axle and / or door sills and / or bumpers and / or side members and / or A, B - or C is Columns, etc. - hereinafter referred to simply as end component - known.
  • component components made of heat-treated steel sheets with component components made of soft, preferably unsigned steel sheets are preferably joined by welding to form an end component.
  • the hot-tempered component component is made prior to joining in particular from a plurality of preformed unshared individual components which are joined together.
  • the individual components and the component components are referred to simplifying as output components.
  • the starting component After the production of the starting component this is tempered in a continuous furnace followed by quenching. Thereafter, the tempered and non-tempered output members are assembled to the final component. By doing so, it is possible to produce end components that have a targeted strength. exhibit keits , with only those starting components are reimbursed in an expensive manner, which must also have a high strength behavior. Despite these advantages, the required effort is still very high in such manufactured end components.
  • the object of the invention is to develop a method in which the total expense in the production of molded end components and / or output components is at least reduced.
  • the object is achieved by a method with the method steps of claim 1. Due to the local inductive stress-relieving annealing of the at least partially formed starting components (individual components and / or component components) or the end components, preferably in the range of high residual stresses and particularly preferably in the range of residual stress peaks, the residual stresses in the heat-treatable, preferably metallic material of the end component are at least partially degraded and in particular the risk of cracking at least reduced. Furthermore, the forming potential of an output component is additionally increased, as a result of which further forming operations can be carried out reliably.
  • individual component components are first joined to form an output component and then shaped, in particular, into the final shape.
  • a hydroforming method is used for forming.
  • targeted areas are locally annealed with low stress in a local manner.
  • the hitherto necessary expense in the heat treatment based on a heating furnace can be reduced since only critical end component regions and / or starting component regions have to be heated and annealed in a targeted manner and only to the required extent.
  • it is possible to purposely reduce undesirable stress present within the end component by means of a location-and / or shape-defined stress relief annealing.
  • possibly cured zones can be drained off by the above-mentioned procedure in this connection.
  • starting components are bent and subsequently shaped to produce the final component.
  • each component present starting component, or end component
  • each component present before and / or after bending before and / or after the Forming by means of local inductive heating to stress-relieved glow.
  • the end component can be joined from output components.
  • joining especially when the joining is carried out by means of a welding process, by structural transformations and other effects residual stress in the material occur.
  • variable hardness geometries such as. Switzerland Listereln, pressure ribs, peripheral hardening, etc.
  • process management is simplified by the possible particular variable use of feed hardening and / or shot hardening.
  • feed hardening and / or shot hardening are also possible.
  • the design of the hardness and / or the strength profile of an end component can be formed much more accurately and in more detail.
  • FIG. 1 shows a device for local stress relief annealing or softening of components
  • FIG. 2 shows a r integral carrier with different voltage ranges consisting of a plurality of interconnected component components
  • Fig. 3a shows a cross section along the line III-III in
  • FIG. 2 with a strip softening and hardening
  • Fig. 3b shows a cross section parallel to the line III-III in
  • Fig. 4a is a hollow cylindrical and formed by means of internal high pressure end component with meandering
  • FIG. 1 shows a device for local heat treatment of, in particular, complex end components, which consists of a plurality of output components 9 a - d joined together.
  • the device is arranged within a production line for green bodies 1 of motor vehicles, in particular of passenger cars.
  • the complex end component is thus the complete body shell 1.
  • the illustrated device further more freely accessible output components of the body shell 1, which are at least partially made of a heat-treatable, preferably metallic material, during the production process, preferably along a production line, defined locally defined and selectively heat treated.
  • a heat-treatable, preferably metallic material during the production process, preferably along a production line, defined locally defined and selectively heat treated.
  • the heat treatment expediently comprises an inductive soft or stress relief annealing and / or an inductive hardening.
  • integral beams 2, chassis and / or body components, front or rear axle carriers, door sills, bumpers, side members and / or A, B or C pillars are suitable as components to be treated in this way.
  • the device according to FIG. 1 has three multi-axis industrial robots 3, 4 and 5. On the arm of each industrial robot 3, 4 and 5, a shape inductor 6 is arranged in each case. On the gripper system of the industrial robots 3, 4 and 5, in each case in the region of the respective mold inductor 6, a respective duct 6 associated transformer 7 is arranged.
  • the shape inductor 6 and the transformer 7 of each industrial robot 3, 4 and 5 are provided with a flexible hose package 8, with which they can be supplied with power and a coolant.
  • this embodiment of the device can be dispensed with hitherto conventional energy-intensive heat ovens for heat treatment.
  • components can be provided with differently shaped stress relief annealed softening patterns and / or hardness patterns in a highly flexible and extremely variable manner by means of the industrial robot guided mold structures 6.
  • FIG. 2 shows an integral carrier 2 as a further exemplary embodiment of an end component.
  • the integral carrier 2 is made of a plurality of output components 9 a-d, which are preferably welded together, glued or joined in any other way forming a secure connection.
  • the output components 9 a-d and / or the integral carrier 2 may in turn be formed from preferably preformed and permanently connected individual components, which in this case also represent output components 9 a-d in the present sense of the word.
  • the stress relationships tensile stress: sigma +; compressive stress: sigma
  • these curved regions can be locally softened, ie stress-relieved, and / or stiffened or hardened.
  • the integral support 2 which is made of a heat-treatable, preferably metallic, material at least in regions, is formed from a plurality of output components 9 ad, which are shaped and at least partially heated.
  • the heating takes place here by a local inductive heating, wherein the material of the integral carrier 2 is annealed in particular low stress.
  • the inductive heating inter alia, in the range of high residual stresses and preferred is carried out in the range of residual stresses, thereby the residual stresses and preferably the residual stresses of the output components 9 ad and / or the integral carrier 2 can be at least partially degraded.
  • the integral support 2 is composed of a plurality of output components 9 a-d, wherein the output components 9 a-d may have different component strengths from each other in some regions.
  • An output component 9 a-d can additionally be bent and then reshaped. Such a transformation takes place in a meaningful way by means of an internal high-pressure process. Since residual stresses in the material of the respective component can occur during this transformation, the affected regions of a formed component (starting and / or end component) are expediently annealed with low stress before and / or after shaping.
  • FIG. 3 a shows a cross section through the curved region of the integral carrier 2 according to FIG. 2.
  • the cross section has softened and / or hardened strips realized along its circumference by means of stress relief annealing. These strips can be in the direction of the affected area (curved area) parallel to the center line of the curved area (central stripe hardening 10 or softening 11) and / or transversely in the manner of a screw thread (helical hardening 12 or softening 13) and / or meandering (MäanderstMailhärtung 14 or - softening 15) are attached.
  • edge regions of the strip softening or hardening can have a straight line and / or corrugation and / or parallel or opposite directions to each other as well as a different course.
  • all other conceivable softening patterns and / or hardness patterns can be realized.
  • FIG. 3b shows a further cross-section which is aligned parallel to the line III-III in FIG.
  • the cure (perimeter strip cure 16) is along the entire circumference of the cross section.
  • the edge regions of the peripheral strip cures 16 can have a straight line and / or corrugated us / or parallel or opposite directions to one another and also a different course.
  • FIG. 4 a shows a detail of an at least partially hollow-cylindrical end component, which was preferably produced by hydroforming.
  • This end component has meander strip hardening 14 or softening 15 along its course direction following one of these running directions.
  • Such a shaping of a hardness or a softening pattern that can be achieved by stress relief annealing is particularly useful in the case of tensile and / or compressive stresses along the direction of propagation of a component.
  • FIG. 4b shows an end component which is analogous to the end component according to FIG. 4a and has along its outer shell various circumferential strip hardenings 16 and circumferential strip softs 17, center strip hardenings 10 and center strip softenings 11 and helical line hardenings 12 or helical line softenings aligned transversely to the circumferential line.
  • the name helix is here due to the fact that such fferenstsammlunghärtungen 12 or -Eerweichept would extend over a longer extension in the manner of a screw thread over the outer shell of the end member.
  • the end component according to FIG. 4b also has a pressure plate 18, which is arranged in the form of a circular area on the outer jacket of the end component. If the pressure plate 18 is a hardened area, it can absorb pressure, in the case of a softened area be provided as a desired breakthrough and / or Aufwölbstelle.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Health & Medical Sciences (AREA)
  • Child & Adolescent Psychology (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Abstract

L'invention concerne un procédé de production d'un composant d'un châssis et/ou d'une carrosserie, en un matériau pouvant être soumis à un traitement thermique, de préférence un matériau métallique, ci-après désigné, de manière simplifiée, par 'composant final', ledit composant final étant usiné de manière à lui conférer une forme, à partir d'un composant initial, et préchauffé, au moins par endroits. L'invention est caractérisée en ce que le composant initial et/ou le composant final, formé à partir d'un composant individuel et/ou d'un élément de composant, est chauffé localement par induction et est soumis, par chauffage par induction, à un recuit de détente, et en ce que les contraintes internes du composant initial (9 a-d) et/ou du composant final sont supprimées au moins partiellement.
PCT/EP2008/000940 2007-02-08 2008-02-07 Procédé de production d'un composant d'un châssis et/ou d'une carrosserie WO2008095705A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007006254.2 2007-02-08
DE102007006254A DE102007006254A1 (de) 2007-02-08 2007-02-08 Verfahren zur Herstellung eines Fahrwerk- und/oder Karosseriebauteils

Publications (1)

Publication Number Publication Date
WO2008095705A1 true WO2008095705A1 (fr) 2008-08-14

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PCT/EP2008/000940 WO2008095705A1 (fr) 2007-02-08 2008-02-07 Procédé de production d'un composant d'un châssis et/ou d'une carrosserie

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DE (1) DE102007006254A1 (fr)
WO (1) WO2008095705A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102013006797A1 (de) 2013-04-19 2014-03-20 Daimler Ag Verfahren zum Herstellen eines Bauteils und Fahrzeugbauteil

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3438356A1 (de) * 1984-10-19 1986-04-24 Hoesch Stahl AG, 4600 Dortmund Verfahren und vorrichtung zum vorbestimmen von biege- und knicklinien
EP0548859A1 (fr) * 1991-12-20 1993-06-30 Bayerische Motoren Werke Aktiengesellschaft Procédé de fabrication d'éléments de support de véhicules
EP0623739A1 (fr) * 1993-05-03 1994-11-09 Volkswagen Aktiengesellschaft Collecteur
EP0862956A1 (fr) * 1997-03-05 1998-09-09 Daimler-Benz Aktiengesellschaft Poutre creuse pour une carrosserie, et méthode de formage par pression interne
EP1125774A2 (fr) * 2000-02-17 2001-08-22 Benteler Ag Composants de suspension de véhicules à moteur
DE10120934A1 (de) * 2001-04-27 2002-10-31 Benteler Automobiltechnik Gmbh Fahrwerks- oder Karosseriebauteil
DE10212400C1 (de) * 2002-03-13 2003-04-03 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Formbauteils
DE10312028A1 (de) * 2003-03-18 2004-10-07 Tower Automotive Hydroforming Gmbh & Co. Kg Verfahren zur Herstellung von Bauteilen
DE102005033360A1 (de) * 2005-07-16 2007-01-18 Daimlerchrysler Ag Verfahren zur Herstellung von vergüteten Stahl-Kraftfahrzeugbauteilen

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3438356A1 (de) * 1984-10-19 1986-04-24 Hoesch Stahl AG, 4600 Dortmund Verfahren und vorrichtung zum vorbestimmen von biege- und knicklinien
EP0548859A1 (fr) * 1991-12-20 1993-06-30 Bayerische Motoren Werke Aktiengesellschaft Procédé de fabrication d'éléments de support de véhicules
EP0623739A1 (fr) * 1993-05-03 1994-11-09 Volkswagen Aktiengesellschaft Collecteur
EP0862956A1 (fr) * 1997-03-05 1998-09-09 Daimler-Benz Aktiengesellschaft Poutre creuse pour une carrosserie, et méthode de formage par pression interne
EP1125774A2 (fr) * 2000-02-17 2001-08-22 Benteler Ag Composants de suspension de véhicules à moteur
DE10120934A1 (de) * 2001-04-27 2002-10-31 Benteler Automobiltechnik Gmbh Fahrwerks- oder Karosseriebauteil
DE10212400C1 (de) * 2002-03-13 2003-04-03 Benteler Automobiltechnik Gmbh Verfahren zur Herstellung eines Formbauteils
DE10312028A1 (de) * 2003-03-18 2004-10-07 Tower Automotive Hydroforming Gmbh & Co. Kg Verfahren zur Herstellung von Bauteilen
DE102005033360A1 (de) * 2005-07-16 2007-01-18 Daimlerchrysler Ag Verfahren zur Herstellung von vergüteten Stahl-Kraftfahrzeugbauteilen

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DE102007006254A1 (de) 2008-08-14

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