Title:
【発明の名称】円柱材の製造方法
Document Type and Number:
Japanese Patent JP2891976
Kind Code:
B1
Abstract:
The invention has been accomplished in order to provide a method of manufacturing a columnar material of metal having an excellent dimensional accuracy without the need of much work time and cost, said method comprising equally forming a multiplicity of longitudinal grooves on an outer periphery of a column-shaped raw material of metal, and then uniformly squeezing tip ends of portions between the respective longitudinal grooves to make the same flat to obtain a target outside dimension.
Inventors:
Takashi Asakura
Masafumi Takahashi
Ozawa Junzo
Masafumi Takahashi
Ozawa Junzo
Application Number:
JP2309998A
Publication Date:
May 17, 1999
Filing Date:
February 04, 1998
Export Citation:
Assignee:
Aoyama Manufacturing Co., Ltd.
International Classes:
B21J5/12; B21C1/00; B21C37/04; B21C37/20; B21D15/02; B21H7/18; B23P15/00; (IPC1-7): B21J5/12
Attorney, Agent or Firm:
Akio Najima (2 others)