METAL PLATE FORMING METHOD, PRELIMINARY STAMPING TOOL USED IN SAME, AND OPTIMAL DESIGN METHOD FOR SAME TOOL

摘要

The present invention provides a metal plate forming method which minimizes a deformation ratio of a curvature part when a dimple is formed, and includes a first and a second stamping step. In the first stamping step, a preliminary dimple, which has an upper curvature part and a lower curvature part, is firstly stamped on a metal plate by a preliminary stamping tool. In the second stamping step, the dimple from the first stamping step is secondly stamped by a main stamping tool to be a main dimple.;COPYRIGHT KIPO 2014