DEVICE FOR DETERMINING POSITION IN CUTTING SIMULATION PROCESSING AND METHOD THEREOF

PROBLEM TO BE SOLVED: To exclude an adhesive feeling when moving the front surface of a cutting target object on condition that the cutting amount is zero.SOLUTION: A cutting amount calculating means 8 calculates a unit time cutting amount being the cutting amount by unit time with the use of a virtual rotary cutting tool, on the basis of virtual rotary cutting tool cutting ability data and the number of rotation per unit time of the virtual rotary cutting tool, which is given from a user. A position determining means 10 determines the position of the virtual rotary cutting tool by searching by a binary search method, the position where a conversion collision amount obtained by converting the number of collisions of the dot group data of the virtual rotary cutting tool with voxel data through the use of a cutting target coefficient coincides with the unit time cutting amount with respect to the cutting target object. In this case, a midpoint in the binary search is calculated by returning a boundary point on the opposite side to the progress direction of the virtual rotary cutting tool to the direction of a normal line by the portion of a prescribed distance.