Title:
HOLLOW DRIVE SHAFT USING UPSETTING METHOD AND MANUFACTURING METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/067605
Kind Code:
A1
Abstract:
A hollow drive shaft using an upsetting method and a manufacturing method therefor apply hot forging and an upsetting method to both ends of a workpiece to upset the outer diameter of both ends of the workpiece to be larger than the outer diameter of the middle part of the workpiece, such that a drive shaft can be reduced in weight and a greater drive force can be transmitted. As the present invention applies an upsetting method in hot forging during the manufacture of a hollow drive shaft, portions to be actually processed are limited to both ends of the workpiece, and the finishing number of upsets is a minimum number of times (such as two times), such that the initial investment cost and manufacturing costs are low due to the small number of processes. Moreover, since the hollow drive shaft is manufactured by the upsetting method rather than a swaging method, manufacturing costs are reduced and performance of the drive shaft is improved.
Inventors:
KIM SUNG HA (KR)
HWANG EUI HYOUK (KR)
PARK YOUNG JUNE (KR)
HWANG EUI HYOUK (KR)
PARK YOUNG JUNE (KR)
Application Number:
PCT/KR2018/014949
Publication Date:
April 02, 2020
Filing Date:
November 29, 2018
Export Citation:
Assignee:
ILJIN STEEL CORP (KR)
International Classes:
B21K1/06; B21H1/18; B21J1/06; B21J5/08; B21J5/12; B23B5/00; C21D1/42
Foreign References:
| KR20150059668A | 2015-06-02 | |||
| KR20100027258A | 2010-03-11 | |||
| KR101199767B1 | 2012-11-09 | |||
| KR20080050342A | 2008-06-05 | |||
| JP2007075824A | 2007-03-29 |
Attorney, Agent or Firm:
HMP IP GROUP (KR)
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