Title:
METHOD OF DESIGNING MATERIAL FOR CYLINDER FORMATION PROCESS, AND CYLINDER FORMATION PROCESSED PRODUCT
Document Type and Number:
WIPO Patent Application WO/2012/081717
Kind Code:
A1
Abstract:
Provided are a method of designing a material having mechanical characteristics such that a spring-back angle of a predetermined value can be obtained after a cylinder formation process of materials having various mechanical characteristics or thicknesses, and a processed product. A method of designing a material for a cylinder formation process, when designing a metal material subjected to a cylinder formation process involving bending, comprises: calculating a yield strength YP, a Young's modulus E, and a thickness t of the metal material such that a spring-back angle Δθ has a predetermined value after a cylinder formation process under the conditions of a bending radius of curvature r of 5 mm or more and a bending angle θ of 90° or more and 180° or less; and designing the metal material such that the metal material has the calculated yield strength YP and Young's modulus E.
Inventors:
SUTO MIKITO (JP)
KOJIMA KATSUMI (JP)
NAKAGAWA YUSUKE (JP)
TADA MASAKI (JP)
TOBIYAMA YOICHI (JP)
KOJIMA KATSUMI (JP)
NAKAGAWA YUSUKE (JP)
TADA MASAKI (JP)
TOBIYAMA YOICHI (JP)
Application Number:
PCT/JP2011/079273
Publication Date:
June 21, 2012
Filing Date:
December 13, 2011
Export Citation:
Assignee:
JFE STEEL CORP (JP)
SUTO MIKITO (JP)
KOJIMA KATSUMI (JP)
NAKAGAWA YUSUKE (JP)
TADA MASAKI (JP)
TOBIYAMA YOICHI (JP)
SUTO MIKITO (JP)
KOJIMA KATSUMI (JP)
NAKAGAWA YUSUKE (JP)
TADA MASAKI (JP)
TOBIYAMA YOICHI (JP)
International Classes:
B21D5/01; B21D51/10
Foreign References:
JP2004261845A | 2004-09-24 |
Other References:
See also references of EP 2638982A4
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JP)
Ken-ichiro Ochiai (JP)
Ken-ichiro Ochiai (JP)
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Claims: