MOLDING METHOD OF PRESS PART, MANUFACTURING METHOD OF PRESS PART AND MOLDING METAL MOLD OF PRESS PART

摘要

PROBLEM TO BE SOLVED: To provide a molding method of a press part, a manufacturing method of the press part and a molding metal mold of the press part, capable of miniaturizing and simplifying equipment constitution used for the metallic press part formed by standing up a cylindrical boss part on a plate-like base part, and capable of also molding the boss part of a wide shape.SOLUTION: A piercing die 110, a hold body 120 and a piercing punch 130 are used for molding a press part 90. The piercing die 110 comprises: a receiving part 111; an external shape molding part 112; and a die side cutting edge 113. The piercing punch 130 also comprises: an internal shape molding part 131; a punch side cutting edge 132; and a straight line part 133. When molding the press part 90, after making a preliminary boss part 92' flow to the external shape molding part 112 by pressing the piercing punch 130 to a preliminary mold 90' of molding the preliminary boss part 92' to a blank BL, a boss part 92 is molded by cutting off the preliminary boss part 92' remaining by flowing to the external shape molding part 112.