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Title:
EVALUATION METHOD OF STRETCH FLANGE PERFORMANCE
Document Type and Number:
Japanese Patent JP2017109227
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an evaluation method which can easily and efficiently evaluate stretch flange performance at secondary press molding.SOLUTION: This evaluation method of stretch flange performance includes: a primary press molding process for obtaining a plurality of primary press moldings which are different in predeformation amounts being a process for primarily press-molding an objective material by using a press processability evaluation device having a specified structure, and forming the primary press moldings having flange parts; a deformation primary press molding process for applying processing for removing a part of a region from the primary press moldings, and obtaining a deformation primary press molding including a flange region; a secondary press molding process for applying secondary press molding for flanging up the flange region of the deformation primary press molding by using the press processability evaluation device, and obtaining a plurality of second press moldings; and a deformation amount measurement process for measuring a plate thickness change amount equivalent to a stretch flange region in the secondary press moldings.SELECTED DRAWING: Figure 1

Inventors:
NOGUCHI KEITA
SUGAMA JUNJI
Application Number:
JP2015246360A
Publication Date:
June 22, 2017
Filing Date:
December 17, 2015
Export Citation:
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Assignee:
NISSHIN STEEL CO LTD
International Classes:
B21D22/00; B21D22/26
Domestic Patent References:
JP2014115269A2014-06-26
Foreign References:
WO2015004908A12015-01-15
WO2016181892A12016-11-17
CA2889954A12014-05-08
WO2011145679A12011-11-24
Attorney, Agent or Firm:
Hayashi Ichiyoshi
Akihiro Kitamura



 
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