PUNCH AND PRESS DIE FOR HALF-BLANKING, MEMBER WITH HALF-BLANKED SHAPE AND IMAGE FORMING APPARATUS

摘要

PROBLEM TO BE SOLVED: To provide a punch for half-blanking with which a half-blanked projecting portion having a height of two-third or more of the thickness of a plate can be formed without causing the cracking and slip-off of the half-blanked projecting portion and which therefore requires no increase in the number of part items and working processes for such half-blanking and consequently is inexpensive, is excellent in position accuracy and is not restricted in the place of use thereof, and to provide a press die which is provided with the half-blanking punch, a member with half-blanked shape in which a half-blanked shape portion is formed by performing half-blanking with the half-blanking punch and a image forming apparatus composed of the member with half-blanked shape in which the half-blanked shape portion is half-blanked with the half-blanking punch.;SOLUTION: The punch for half blanking is composed of: a punch main body 1; the top corner part 2 of the top corner of the punch main body 1 with which the half-blanked portion 4 is formed; and a connection forming part 3 in the top corner part 2, for forming a connecting part 4c with which the slip-off of the half-blanked projecting portion 4b from the main body 4a of the plate member of the half-blanked shape portion 4 is prevented .;COPYRIGHT: (C)2006,JPO&NCIPI