Dimensional variation factor analysis method, dimensional variation factor analysis device, dimensional variation factor analysis program, and method for manufacturing press-molded product

Abstract

Press forming analysis is used to identify which part of a blank with shape variation is the cause of the dimensional variation due to shape variation. A reference press-formed product shape is acquired, and a reference shape-variant blank press-formed product shape is acquired. The deviation part and first deviation amount between the reference press-formed product shape and the reference shape-variant blank press-formed product shape are determined. Multiple deformed shape-variant blank models, which are models in which a portion of the blank with shape variation is flattened, are also generated, and the deformed shape-variant blank press-formed product shape is obtained for each deformed shape-variant blank model. The deviation part and second deviation amount between the reference press-formed product shape and each deformed shape-variant blank press-formed product shape are then determined. The first deviation amount and second deviation amount are then compared to determine which part of the blank with shape variation is the main cause of the deviation.

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