Title:
IMPROVED PUNCHING PROCESS
Document Type and Number:
Japanese Patent JPS52106186
Kind Code:
A
Abstract:
PURPOSE: To enable punching process, in which unnecessary parts are punched out from a strip-like material, to pushed but chips into a die hole completely by devising shapes of a punch and a die in order to prevent adverse effect due to unnecessary movement of the punched out chips.
Inventors:
SUGISHIMA MASAYUKI
Application Number:
JP2209376A
Publication Date:
September 06, 1977
Filing Date:
March 03, 1976
Export Citation:
Assignee:
HITACHI LTD
International Classes:
B26F1/00; B21D28/00; B21D28/02; B21D28/06; B21D28/14; B26F1/02; (IPC1-7): B21D28/06; B21D28/14; B26F1/02