PRESS DIE, BURRING PROCESS, AND PRESS-FORMED ARTICLE

摘要

PROBLEM TO BE SOLVED: To provide a press die configured to reduce the warpage generated in a plane part continuous with a boss in the case the boss is molded by burring, a burring process using the press die, a casting method using the press die, and press-formed articles.;SOLUTION: The press die 1 consists of a die formed with a burring hole 2a, a stopper arranged to face the die 2 via a metallic sheet 10, and a burring punch 4 formed to a shape insertable into the burring hole 2a, and forms the boss 11 to the metallic sheet 10, and the burring process uses the press die 1. A projecting part 2b consisting of a shape along the peripheral edge of the boss 11 is formed in the die 2.;COPYRIGHT: (C)2008,JPO&INPIT