Title:
APPARATUS AND METHOD FOR MANUFACTURING RACK BAR
Document Type and Number:
WIPO Patent Application WO/2020/085230
Kind Code:
A1
Abstract:
An apparatus for manufacturing a rack bar includes a pre-forming machine forming a flattened portion on an outer peripheral surface of a hollow shaft member, a teeth forming machine forming rack teeth on the flattened portion, a heat treatment machine quenching the rack teeth, a first conveying machine carrying the shaft member into and from the pre-forming machine, a second conveying machine carrying the shaft member into and from the teeth forming machine, and a third conveying machine carrying the shaft member into and from the heat treatment machine. The first conveying machine, the second conveying machine, and the third conveying machine hold one end of the shaft member from a radially inner side of the shaft member. The apparatus of the rack bar are suitable for manufacturing a relatively short hollow rack bar having rack teeth formed over substantially an entire length of a shaft member.
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Inventors:
SUZUKI RYOSUKE (JP)
SUNAGA NORIMASA (JP)
SUNAGA NORIMASA (JP)
Application Number:
PCT/JP2019/041051
Publication Date:
April 30, 2020
Filing Date:
October 18, 2019
Export Citation:
Assignee:
NETUREN CO LTD (JP)
International Classes:
B21K1/76
Foreign References:
| JP2009262694A | 2009-11-12 | |||
| JP2008229675A | 2008-10-02 | |||
| JPH10158742A | 1998-06-16 | |||
| JP2014124767A | 2014-07-07 | |||
| CN101269390A | 2008-09-24 | |||
| JP2009262694A | 2009-11-12 | |||
| JP2008229676A | 2008-10-02 | |||
| JPH10158742A | 1998-06-16 | |||
| JP2014124767A | 2014-07-07 | |||
| JP2018199511A | 2018-12-20 |
Attorney, Agent or Firm:
KOH-EI PATENT FIRM, P.C. (JP)
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