Method for producing sheet metal component, comprises heating sheet metal workpiece, inserting the workpiece in a forming die, and fixing the sheet metal workpiece in the forming die by the production of positive-locking connection

摘要

The method comprises heating sheet metal workpiece at 1023 K, inserting the sheet metal workpiece in a forming die (40), fixing the sheet metal workpiece in the forming die by the production of positive-locking connection (10) between the sheet metal workpiece and the forming die during applying of forming power, and forming the sheet metal workpiece by relative movement of a forming stamp (42) of the forming die in related to a matrix of the forming die. The sheet metal workpiece is cooled by a cooling unit in the area of the positive-locking connection. The method comprises heating sheet metal workpiece at 1023 K, inserting the sheet metal workpiece in a forming die (40), fixing the sheet metal workpiece in the forming die by the production of positive-locking connection (10) between the sheet metal workpiece and the forming die during applying of forming power, and forming the sheet metal workpiece by relative movement of a forming stamp (42) of the forming die in related to a matrix of the forming die. The sheet metal workpiece is cooled by a cooling unit in the area of the positive-locking connection in the begining of the forming of sheet metal workpiece. The cooling unit is a component of a chain holder (44) or blank holder (46) that is arranged at the area of the positive-locking connection in the beginning of the forming of the sheet metal workpiece. The positive-locking connection is realized through a hole in the sheet metal workpiece and a pin forming complimentary to hole width and hole type by attaching the sheet metal workpiece on the pin. The pin is arranged on the forming die. The sheet metal workpiece is cooled in the area of the positive-locking connection with a cooling rate that is larger than the cooling rate of the total sheet metal component during carrying out a press-hardening process. The size and position of the oblong hole in the sheet metal workpiece are measured in such a way that a relative movement between the pin and oblong hole edge takes place during partially carrying out a length contraction process. The sheet metal workpiece is used after inserting the sheet metal workpiece in the forming die. A round hole-pin-connection and a oblong hole-pin-connection are used as positive-locking connection. The area of the positive-locking connection has a temperature of maximum 673 K during forming the sheet metal workpiece. The hole in the sheet metal workpiece serves as positioning and fixing aid in a further process step. Independent claims are included for: (1) a device for press hardening of sheet metal workpiece; and (2) a sheet metal component.