Title:
METHOD FOR ACQUIRING PRESS FORMING LIMIT LINE
Document Type and Number:
WIPO Patent Application WO/2023/032369
Kind Code:
A1
Abstract:
A method for acquiring a press forming limit line according to the present invention comprises: a step (S1) for conducting a basic forming test to acquired the presence or absence of occurrence of cracking in a place of a thin metal sheet where a deformation path transitions from compression deformation to tension deformation; a step (S3) for calculating a sheet thickness change amount in the basic forming test on the thin metal sheet by means of FEM analysis; a step (S5) for determining, from the calculated sheet thickness change amount, the maximum sheet thickness increase amount in the thin metal sheet under compression deformation and a relative sheet thickness decrease amount in the thin metal sheet under tension deformation following the compression deformation, as cracking determination parameters; a step (7) for plotting the presence or absence of occurrence of cracking, in association with the cracking determination parameters on a two-dimensional coordinate system; and a step (S9) for generating a forming limit line that sectionalizes the presence or absence of occurrence of cracking on the basis of the distribution of the plotted presence or absence of occurrence of cracking.
More Like This:
Inventors:
KARIYAZAKI YUTA (JP)
SATO KENTARO (JP)
SATO KENTARO (JP)
Application Number:
PCT/JP2022/021878
Publication Date:
March 09, 2023
Filing Date:
May 30, 2022
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21D22/00; G01N3/28
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
Download PDF:
Previous Patent: MOTOR PUMP
Next Patent: METHOD FOR PREDICTING TENSION-COMPRESSION REVERSE LOADING BEHAVIOR OF METAL MATERIAL
Next Patent: METHOD FOR PREDICTING TENSION-COMPRESSION REVERSE LOADING BEHAVIOR OF METAL MATERIAL