Title:
WATER PUMP ROTATING SHAFT MANUFACTURING METHOD
Document Type and Number:
Japanese Patent JP2008121775
Kind Code:
A
Abstract:
To provide a manufacturing method for sufficiently reducing manufacturing cost by improving a material yield and shortening a machining time.
A multistage former machines a second raw material shown in Fig.1(A) through a preliminary intermediate raw material 15 shown in (B) and an intermediate raw material 16 shown in (C) into a second intermediate raw material 17 shown in (D). Such a series of machining are all performed with cold work. In upsetting work shown in (C) out of these, excessive thicknesses are gathered in a gap 28 between a pair of upsetting dies 27a, 27b to form a protruded portion which is crushed in a handling process shown in (D).
Inventors:
KOBAYASHI KAZUTO
SHINDO ISAO
OTSUKA SEIJI
SHINDO ISAO
OTSUKA SEIJI
Application Number:
JP2006305798A
Publication Date:
May 29, 2008
Filing Date:
November 10, 2006
Export Citation:
Assignee:
NSK LTD
International Classes:
F16C33/64; F01P5/10; F04D29/043
Domestic Patent References:
| JP2004162629A | 2004-06-10 | |||
| JP2006289374A | 2006-10-26 | |||
| JP2000140979A | 2000-05-23 | |||
| JPS5890435A | 1983-05-30 | |||
| JP2006111070A | 2006-04-27 |
Attorney, Agent or Firm:
Takeo Koyama
Takashi Daejeon
Kinzo Koyama
Takashi Daejeon
Kinzo Koyama