公开(公告)号：JPS62252619A

公开(公告)日：1987-11-04

申请号：JP9421386

申请日：1986-04-23

Applicant: NAT AEROSPACE LAB

Inventor： ISHIDA YOJI ,  NAKATANI TERUOMI

IPC: B21D28/24 ,  B21D31/02

Abstract: PURPOSE:To mass-produce products and to improve the product accuracy by plating a plate body provided wit the numerous grooves or holes larger than a prescribed size at prescribed positions and contracting the grooves or holes to the prescribed size. CONSTITUTION:Grooves 2 or holes 3 somewhat larger than a required size are made on a plate body 1. Then, the plate body 1 is roughly formed in accordance with its applications and deformations of the grooves or holes due to the above forming are corrected. Further, the hole diameter or slot width is made to be smaller up to a prescribed size by repeated plating. In that method, small holes or narrow slots are mass-produced.