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Title:
WIRE DRAWING METHOD AND WIRE DRAWING DEVICE
Document Type and Number:
WIPO Patent Application WO/2022/085375
Kind Code:
A1
Abstract:
Provided is a wire drawing method and a wire drawing device for preparing a first wire rod, which includes a first pipe material having a first length in a longitudinal direction and a second pipe material having a second length in the longitudinal direction different from the first length in the longitudinal direction, reducing the cross-sectional diameter of the first wire rod by wire drawing, thereby producing a second wire rod, which includes the first pipe material having a third length in the longitudinal direction and the second pipe material having a fourth length in the longitudinal direction different from the third length in the longitudinal direction such that a first difference between the third length in the longitudinal direction and the fourth length in the longitudinal direction of the second wire rod is smaller than a second difference between the first length in the longitudinal direction and the second length in the longitudinal direction of the first wire rod.

Inventors:
HONG YOUNJEONG (JP)
HSIEH CHENGTING (JP)
Application Number:
PCT/JP2021/035534
Publication Date:
April 28, 2022
Filing Date:
September 28, 2021
Export Citation:
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Assignee:
HITACHI LTD (JP)
International Classes:
B21C1/00; B21C1/16; B21C1/22
Foreign References:
JPH03254019A1991-11-13
JP2009269069A2009-11-19
JP2019503868A2019-02-14
JPS4825655A1973-04-03
JP2009176664A2009-08-06
JP2012074244A2012-04-12
JPS63274022A1988-11-11
JPS6133710A1986-02-17
JPH05307917A1993-11-19
Attorney, Agent or Firm:
SEIRYO I.P.C. (JP)
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