In order to solve the problems existing in geometric simulation of cutting process

Slice method is presented.The instantaneous shape of rough blanks which are being cut can be represented by the characteristics set that can be get through proper slice of machined parts and the intersection calculation of cutter and machined parts.By using this method

the accurate result of intersection calculation can be accurate and be get rapidly.Besides

because this method is based on visual c++ and OpenGL

it can be isolated from the commercial softwares.The method is proved to be feasibility by the cutting simulation example of cylinder gears and bevel gears.