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Patent Searching and Data


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)
Application Number:
PCT/JP2011/079273
Publication Date:
June 21, 2012
Filing Date:
December 13, 2011
Export Citation:
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Assignee:
JFE STEEL CORP (JP)
SUTO MIKITO (JP)
KOJIMA KATSUMI (JP)
NAKAGAWA YUSUKE (JP)
TADA MASAKI (JP)
TOBIYAMA YOICHI (JP)
International Classes:
B21D5/01; B21D51/10
Foreign References:
JP2004261845A2004-09-24
Other References:
See also references of EP 2638982A4
Attorney, Agent or Firm:
OCHIAI, Kenichiro (JP)
Ken-ichiro Ochiai (JP)
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Claims: