CONSTITUTION POINT CALCULATION DEVICE AND CONSTITUTION POINT CALCULATION PROGRAM OF SPRING BACK SHAPE

摘要

PROBLEM TO BE SOLVED: To provide a constitution point calculation device capable of accurately calculating constitution points in a spring back shape corresponding to the constitution points of a target shape even in a case when a three-dimensional distortion is generated.SOLUTION: The constitution point calculation device includes: a partial position mating part 15 that carries out an alignment between a die shape and a spring back shape using a mesh and a point group, which are generated from a piece of die shape data for each predetermined divided area; and a line length holding deformation part 16 that, after calculating a rotation of the mesh before and after deformation, and based on the calculated rotation, calculates coordinate values mesh vertexes of the spring back shape after being retained in a line length. By carrying out the alignment using the mesh and the point group, even a case where a three-dimensional distortion is generated can be handled. By carrying out the alignment on each divided area, the line length rarely changes. By correcting a change of line length in a rotation space where no length element is included, coordinate values of the mesh vertices can be calculated with minimum changes inline length.SELECTED DRAWING: Figure 1