Press forming apparatus and press forming method

摘要

The present invention relates to a press forming apparatus and a press forming method capable of drawing a sheet material, and to a punch unit for drawing-molding by pressing at least a portion of one surface of a forming area of a sheet material, and installed on both sides of the punch unit to form the punch unit. A first mold including a holding part for holding by pressing one surface of the holding region on both sides of the forming region of the plate material when drawing forming the plate material, is provided to face the first mold, and the punch unit is provided to face the plate material when drawing the plate material A second mold including a die portion for supporting the other surface of the holding area of the plate material, and at least one of the first mold or the second mold is installed, the molding mold including the first mold and the second mold A load sensor unit for measuring a load value applied to a load sensor unit and the first mold and the second mold are molded and the load value applied to the molding die is applied in real time from the load sensor unit when the plate material is draw-molded. It may include a control unit that calculates a mold load pattern signal obtained by patterning the change in the load value, and determines whether the drawing molding is abnormal by comparing the mold load pattern signal with a pre-stored reference pattern signal.