Patent ID: 7900492
Filing Date: 2011-03-08
Classification: B21D

Abstract:
1. A method for press-forming a panel part having a bent portion, comprising the sequential steps of: bending an unrestrained panel material along a portion, which will be the bent portion of the panel part, so that the panel material is placed along a forming face of a punch; restraining a restraint-target portion of the panel material, which is set along a periphery of the panel material, with the panel material placed along the forming face of the punch; and stretching or drawing a to-be-product portion of the panel material so that the to-be-product portion is formed into a product shape; wherein drawing an addendum shape portion of the panel material, which is set on an inner side of the restraint-target portion and which surrounds the to-be-product portion of the panel material, by an amount that is equal to or less than a limit to which the panel material can be drawn so that the to-be-product portion of the panel material is roughly conformed to the forming face of the punch and so that crinkling occurs outside the to-be-product portion and does not occur in the to-be-product portion.