Two-blow heating and forming tool and method for producing hot-formed and press-hardened motor vehicle components

Abstract

A two-blow heating and forming tool for the simultaneous production of two hot-formed and press-hardened motor vehicle components is provided. The tool includes a heating device and a forming device, with at least two contact heating tools and at least two hot-forming and press-hardening tools being arranged next to one another in parallel in a press such that, during a closing movement, two blanks are heated and two heated blanks are hot-formed and press-hardened to form two motor vehicle components. A method for producing hot-formed and press-hardened motor vehicle components using a two-blow heating and forming tool is also provided, the method including producing two mirror-inverted motor vehicle components simultaneously in one press cycle.

What is claimed is: 
     
         1 . A two-blow heating and forming tool for the simultaneous production of two hot-formed and press-hardened motor vehicle components, comprising at least two contact heating tools and at least two hot-forming and press-hardening tools which are arranged in parallel next to one another in a press, such that, during a closing movement, two blanks are heated and two heated blanks are hot-formed and press-hardened to form two motor vehicle components. 
     
     
         2 . The heating and forming tool as claimed in  claim 1 , wherein the two contact heating tools and/or the two hot-forming and press-hardening tools are mounted resiliently. 
     
     
         3 . The heating and forming tool as claimed in  claim 1 , wherein the two contact heating tools and/or the two hot-forming and press-hardening tools are mounted resiliently on a top die. 
     
     
         4 . The heating and forming tool as claimed in  claim 1 , wherein the two hot-forming and press-hardening tools are designed as combined hot-cutting and/or hot-perforating tools. 
     
     
         5 . The heating and forming tool as claimed in  claim 1 , wherein a conveyor is provided which transfers the heated blanks from the contact heating tools into the hot-forming and press-hardening tools. 
     
     
         6 . The heating and forming tool as claimed in  claim 5 , wherein the heated blanks are transferred by the conveyor from the contact heating tools into the hot-forming and press-hardening tools in a time less than or equal to the press cycle. 
     
     
         7 . The heating and forming tool as claimed in  claim 5 , wherein the heated blanks are transferred by the conveyor from the contact heating tools into the hot-forming and press-hardening tools in a time that is a part of the press cycle. 
     
     
         8 . The heating and forming tool as claimed in  claim 1 , wherein a mechanical press or a hydraulic press is used. 
     
     
         9 . The heating and forming tool as claimed in  claim 1 , wherein a servopress is used. 
     
     
         10 . The heating and forming tool as claimed in  claim 1 , wherein the contact heating tools have at least one contact plate heated by an inductor. 
     
     
         11 . The heating and forming tool as claimed in  claim 1 , wherein the contact heating tools have at least one contact plate that is formed by an electrically heatable conductor. 
     
     
         12 . The heating and forming tool as claimed in  claim 1 , wherein the contact heating tools have one electric compensating element each, wherein a current-conducting cross-sectional area of the compensating element added to the current-conducting cross-sectional area of the blank to be heated form an overall current-conducting cross-sectional area, wherein, by configuration of the overall current-conducting cross-sectional area, a homogeneous heating of the blank takes place in a targeted manner. 
     
     
         13 . The heating and forming tool as claimed in  claim 1 , wherein the contact heating tools have one electric compensating element each, wherein a current-conducting cross-sectional area of the compensating element added to the current-conducting cross-sectional area of the blank to be heated form an overall current-conducting cross-sectional area, wherein, by configuration of the overall current-conducting cross-sectional area, a partially differing heating takes place in a targeted manner. 
     
     
         14 . The heating and forming tool as claimed in  claim 1 , wherein the contact heating tools and/or the hot-forming and press-hardening tools are resiliently mounted so as to be relatively movable on a support plate of the press. 
     
     
         15 . The heating and forming tool as claimed in  claim 1 , wherein the contact heating tools and/or the hot-forming and press-hardening tools each have an additional trimming tool and/or perforating tool. 
     
     
         16 . The heating and forming tool as claimed in  claim 1 , wherein an elastic adjusting element is arranged between hot-forming and press-hardening tool and press, as a result of which the hot forming is already completed before the press is completely closed, and the remaining closing distance of the press leads to compression of the elastic adjusting element. 
     
     
         17 . The heating and forming tool as claimed in  claim 1 , wherein an elastic element is incorporated between contact heating tool and press table, the elastic element compensating for a thermal expansion of the contact heating tool. 
     
     
         18 . The heating and forming tool as claimed in  claim 1  wherein a linear conveyor system which is formed from at least two rails lying opposite in parallel is provided along heating and forming tool, the rails being shiftable in at least one translatory direction and gripping elements being arranged on the rails, the gripping elements being shiftable in the axial direction of the rails, and wherein the gripping elements are raisable and lowerable in the vertical direction (V) orthogonally to the axial direction of the rails. 
     
     
         19 . The heating and forming tool as claimed in  claim 18 , wherein the rails are shiftable orthogonally to the axial direction thereof and outward or inward with respect to the heating and forming tool, and/or wherein the rails are shiftable in the axial direction thereof for transporting the blanks and motor vehicle components. 
     
     
         20 . A method for producing hot-formed and press-hardened motor vehicle components using a two-blow heating and forming tool comprising:
 providing a two-blow heating and forming tool for the simultaneous production of two hot-formed and press-hardened motor vehicle components, said tool including at least two contact heating tools and at least two hot-forming and press-hardening tools which are arranged in parallel next to one another in a press, such that, during a closing movement, two blanks are heated and two heated blanks are hot-formed and press-hardened to form two motor vehicle components; and   simultaneously producing two mirror-inverted motor vehicle components in one press cycle.