Folding line generation method for bending and bending system based thereon

摘要

In a bending simulation apparatus, after a three-dimensional drawing generation portion generates a solid form from trihedral drawing data, a workpiece bending simulation portion places a workpiece for forming edge angles of a solid form on a die and carries out simulation operation for bending the workpiece completely up to the edge angle according to bending information including the edge angle of each side of the solid form, workpiece condition, tool condition and the like. An elongation amount of the workpiece is obtained by an elongation amount calculation portion and an elongation amount subtraction portion subtracts the elongation amount from a length of each side of the solid form. A development drawing generation portion creates a development drawing and an L-value calculation portion transmits Li value based on this development drawing to the press machine.