MOLD APPARATUS FOR FORMING THE CORNER OF A PRESS PRODUCT AND FORMING METHOD CAPABLE OF MINIMIZING THE CURVATURE RADIUS AND THICKNESS VARIANCE OF THE CORNER OF THE PRODUCT

摘要

PURPOSE: A mold apparatus for forming the corner of a press product and a forming method are provided to enable the formation of a corner according to the elongation rate of each product using heating conditions, material, and thickness information of the product.;CONSTITUTION: A mold apparatus for forming the corner of a press product comprises a movable auxiliary punch(30) and a stepped plane(25). The movable auxiliary punch engages with a punch(21) and moves to a lower die(10). The movable auxiliary punch is moved up and down from the punch by a drive unit. The lower surface(301) of the movable auxiliary punch is projected from the lower surface(211) of the punch and is pressed to a workpiece(3). The lower surface of the movable auxiliary punch is narrower than the lower surface of the punch. The stepped plane is formed on both wall surfaces(212) of a punch facing to a side wall(112) of a forming groove. The stepped plane pressurizes both upper ends of the product inserted into the forming groove.;COPYRIGHT KIPO 2011