Press forming analysis method, press forming analysis apparatus, and press forming analysis program

A press forming analysis apparatus for predicting an influence of a shape variation of a blank taken from a metal sheet having the shape variation in a case where press forming is performed by using the blank, comprising:

• a first blank generation unit configured to generate a standard waveform blank model having a waveform with a predetermined wavelength and a predetermined amplitude in accordance with the shape variation;
• a first shape acquisition unit configured to acquire a shape of a press-formed part after die release as a first shape by performing press forming analysis by using the standard waveform blank model in a case where press forming is performed with a predetermined tool-of-press-forming model;
• a second blank generation unit configured to generate one or a plurality of types of cycle deviation waveform blank models having a waveform with a same amplitude as an amplitude of a waveform of the standard waveform blank model and a cycle deviating from a cycle of the waveform of the standard waveform blank model;
• a second shape acquisition unit configured to acquire a shape of a press-formed part after die release as a second shape by performing press forming analysis by using the cycle deviation waveform blank model in a case where press forming is performed with the predetermined tool-of-press-forming model;
• and
• a deviation amount acquisition unit configured to obtain a portion where both of the shapes deviate from each other and a deviation amount by comparing the first shape with one or a plurality of types of second shapes.

A non-transitory computer-readable recording medium on which an executable program for predicting an influence of a shape variation of a blank taken from a metal sheet having the shape variation in a case where press forming is performed by using the blank, the program causing a processor of a computer to execute:

• generating a standard waveform blank model having a waveform with a predetermined wavelength and a predetermined amplitude in accordance with the shape variation;
• acquiring a shape of a press-formed part after die release as a first shape by performing press forming analysis by using the standard waveform blank model in a case where press forming is performed with a predetermined tool-of-press-forming model;
• generating one or a plurality of types of cycle deviation waveform blank models having a waveform with a same amplitude as an amplitude of a waveform of the standard waveform blank model and a cycle deviating from a cycle of the waveform of the standard waveform blank model;
• acquiring a shape of a press-formed part after die release as a second shape by performing press forming analysis by using the cycle deviation waveform blank model in a case where press forming is performed with the predetermined tool-of-press-forming model;
• and
• obtaining a portion where both of the shapes deviate from each other and a deviation amount by comparing the first shape with one or a plurality of types of second shapes.