METHOD FOR ESTIMATING PRESS-MOLDED STATE, AND METHOD FOR ACQUIRING COEFFICIENT OF FRICTION FOR MOLDING SIMULATION

摘要

PPROBLEM TO BE SOLVED: To acquire simulation results matched with actual press molding results and acquire fully accurate simulation results, even at low surface pressure and low sliding speed. PSOLUTION: In a press-molded state estimating method, a prescribed coefficient of friction is used to perform molding simulation. The moving speed of a steel product to a metal mold in a molding process and surface pressure received by the steel product from the metal mold are computed for each node, in a finite element method, surface pressure at prescribed section of the steel product is computed, and the sliding speed between the steel product and the metal mold is computed, on the basis of the moving speed of the steel product (step S1-Step S3). A slide testing device is used to perform sliding test, under conditions which satisfy the computed surface pressure and the computed sliding speed for acquiring the coefficient of friction (step S4). The acquired coefficient of friction is used to perform molding simulation again, to estimate the molded state of the steel product (step S5). PCOPYRIGHT: (C)2009,JPO&INPIT