Title:
TORSIONAL EXTREME-PLASTIC PROCESSING METHOD OF CONIC METAL PIPE
Document Type and Number:
WIPO Patent Application WO/2013/089374
Kind Code:
A1
Abstract:
The present invention relates to a torsional extreme-plastic processing method capable of replacing a metal spinning process that is a method for processing a conic metal pipe which is mainly used for a projectile such as a bullet, missile, and a nose cone of an airplane, i.e., a processing method in which rigid-plastic deformation based on torsion and compressive force is applied to a material by using a mold to miniaturize and nano-size crystal particles. According to the rigid-plastic processing method of the present invention, a punch that matches an inner shape of the conic metal pipe is mounted inside the conic metal pipe, and then a mold that matches an outer shape of the conic metal pipe is mounted outside the conic metal pipe. Thus, microstructures of the conic metal pipe may be ultra-finely crystallized or nano-crystallized through shearing obtained by applying the compression and torsion to the conic metal pipe.
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Inventors:
KIM HYOUNG-SEOP (KR)
UM HO-YONG (KR)
YOON EUN-YOO (KR)
LEE DONG-JUN (KR)
LEE SEONG (KR)
UM HO-YONG (KR)
YOON EUN-YOO (KR)
LEE DONG-JUN (KR)
LEE SEONG (KR)
Application Number:
PCT/KR2012/010335
Publication Date:
June 20, 2013
Filing Date:
November 30, 2012
Export Citation:
Assignee:
POSTECH ACAD IND FOUND (KR)
International Classes:
B21D11/02; B21D7/00; B21D11/14; C21D7/02
Foreign References:
| JP2005000990A | 2005-01-06 | |||
| KR20050073129A | 2005-07-13 |
Other References:
See also references of EP 2808101A4
None
None
Attorney, Agent or Firm:
IAM PATENT FIRM (KR)
특허법인아이엠 (KR)
특허법인아이엠 (KR)
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Claims: