EXPANSION PLAN CREATION DEVICE AND EXPANSION PLAN CREATION METHOD

摘要

PROBLEM TO BE SOLVED: To improve shape accuracy of a bent product 10 by enhancing mechanical strength of the bent product 10, while reducing weight and material cost of the bent product 10.;SOLUTION: An automatic program creation device 32 includes: an elongation amount acquisition section 44 for acquiring an elongation amount of a constituting piece 14 neighboring each bending site S; and an expansion plan creation section 46 for correcting expanding dimensions of the constituting piece 14 neighboring each bending site S, on the basis of the elongation amount of the constituting piece neighboring each bending site, and creating an expansion plan on which multiple constituting pieces 14 are planarly expanded. When applying bend processing to a heming part 18, the elongation amount acquisition section 44 acquires an elongation amount of the constituting piece 14 neighboring the bending site S on a die mold 30 side on the heming part 18, on the basis of sheet metal information and a V width of a V groove 30g of the die mold 30, and further acquires an elongation amount of the constituting piece 14 neighboring the bending site S on a punch mold 28 side on the heming part 18, on the basis of the sheet metal information and a virtual V width.;SELECTED DRAWING: Figure 2;COPYRIGHT: (C)2018,JPO&INPIT