METHOD FOR MANUFACTURING CUTTING EDGE MEMBER OF CUTTING TOOL, AND PRESS-FORMING DIE FOR GREEN COMPACT USED IN THE SAME

摘要

PROBLEM TO BE SOLVED: To provide a method for manufacturing a cutting edge member of cutting tool capable of preventing a step part formed in the scooping surface of the cutting edge member from extending up to the cutting edge, and provide a press-forming die for a green compact used in the method.;SOLUTION: The green compact is press-formed to manufacture a cutting edge member of cutting tool by pressing powder material charged into a cavity A by using a plurality of punches 21 and 22 of a press-forming die 20 equipped with the plurality of punches 21 and 22, and equipped with a die 23 for defining the cavity A. The plurality of punches 21 and 22 are composed of a plurality of dividing punches 25, 26, 31 and 32 which are divided with the dividing surfaces extended in the separating and approaching direction of the punches, and a portion corresponding to the cutting edge part of the cutting member is formed by a unit of dividing punch 25 and 31.;COPYRIGHT: (C)2011,JPO&INPIT