Method and thermal recasting assembly for producing a hardened, thermally recast workpiece

摘要

The method for manufacturing a hardened heat-formed workpiece (2) from steel plate, comprises heating a workpiece blank (2') in furnace (5) partially up to a forming temperature, introducing the heated workpiece blank into a drawing press, forming the heated workpiece blank in the drawing press to a workpiece, introducing the formed workpiece into hardening device, fixing the formed workpiece in a reception of the hardening device adapted to a geometry of the deformed workpiece, and partially hardening the formed workpiece in the reception by direct heat exchanger with cooling medium. The method for manufacturing a hardened heat-formed workpiece (2) from steel plate, comprises heating a workpiece blank (2') in furnace (5) partially up to a forming temperature, introducing the heated workpiece blank into a drawing press, forming the heated workpiece blank in the drawing press to a workpiece, introducing the formed workpiece into hardening device, fixing the formed workpiece in a reception of the hardening device adapted to a geometry of the deformed workpiece, and partially hardening the formed workpiece in the reception through the direct heat exchanger with a cooling medium. The workpiece blank is heated to a deformation temperature exceeding the austenitising temperature of the workpiece blank. The heated workpiece blank is pre-cooled in air before introducing into the furnace. The workpiece blank is formed in stepwise manner in the drawing presses to the workpiece. The formed workpiece is partially flowed in the reception of the hardness direction by the cooling medium. The formed and hardened workpiece is directly introduced after removing from the hardening device into a trimmer and is partially trimmed during the forming process. The portion of the workpiece to be trimmed is not hardened in the hardening device and is kept away from the cooling medium. The portion of the workpiece to be trimmed is subjected in contact with the drawing tools of drawing press. An independent claim is included for a heat forming system for manufacturing a hardened workpiece.