Molding simulation method and apparent friction coefficient determination method applied to the method

摘要

PPROBLEM TO BE SOLVED: To provide a method for determining an apparent coefficient of friction for improving the calculation accuracy of a drawing force required to allow a work to pass a bead part of a plate holding part of a forming die, and a forming simulation method for applying the apparent coefficient of friction determined by this method. PSOLUTION: A relationship between a contact bearing pressure and the coefficient of friction in a work plate is obtained by the measurement in advance, and a bead die 5 with a bead part 6 of a sectional shape similar to a sectional shape of the bead part of the forming die formed thereon is assumed. The contact bearing pressure generated in each part of the work plate W passing the bead part 6 is calculated with respect to the pressure P applied to the bead die 5. The drawing force F of the work plate W required to allow the bead die 5 to pass the bead part 6 is calculated by applying the coefficient of friction obtained by the measurement to the calculated contact bearing pressure of each part, and the apparent coefficient of friction is determined by dividing the drawing force F by the pressure P. PCOPYRIGHT: (C)2004,JPO