Title:
MANUFACTURING METHOD FOR HOLLOW RACK BAR AND HOLLOW RACK BAR MANUFACTURING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2019/102927
Kind Code:
A1
Abstract:
A manufacturing method for a hollow rack bar made of a hollow shaft material and including a toothed section which has a rack on an outer surface and a shaft section which is formed thinner than the toothed section, the manufacturing method includes drawing the hollow shaft material by using a die and a plug, and preforming regions of the hollow shaft material including a toothed section forming region configured to form the toothed section and a shaft section forming region configured to form the shaft section to have thicknesses according to the regions respectively, and forming the rack at the toothed section forming region of the hollow shaft material which is preformed.
Inventors:
UEMOTO TOSHIFUMI (JP)
ISHIKI NOBUMOTO (JP)
YAMAWAKI TAKASHI (JP)
ISHIKI NOBUMOTO (JP)
YAMAWAKI TAKASHI (JP)
Application Number:
PCT/JP2018/042288
Publication Date:
May 31, 2019
Filing Date:
November 15, 2018
Export Citation:
Assignee:
NETUREN CO LTD (JP)
International Classes:
B21J5/12; B21C1/24; B21K1/76; B62D3/12; F16H55/26
Domestic Patent References:
| WO2016017158A1 | 2016-02-04 | |||
| WO2006053590A1 | 2006-05-26 |
Foreign References:
| US20070204668A1 | 2007-09-06 | |||
| EP0099311A1 | 1984-01-25 | |||
| DE19508798A1 | 1995-09-28 | |||
| US20060201227A1 | 2006-09-14 | |||
| JPH05345231A | 1993-12-27 | |||
| JP2017223770A | 2017-12-21 |
Attorney, Agent or Firm:
KOH-EI PATENT FIRM, P.C. (JP)
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