A Study on CAM System for Machining of Sculptured Surface in Mold Cavity(1) - Generation of High Precision Machining Data for Curved Surfaces -

3차원 자유곡면 가공용 CAM시스템의 개발에 관한 연구(1) -고정도 곡면가상 정보 생성을 위한 이론적 고찰-

For generating NC machining data automatically, it is important to handle computer models such as geometric shape data including engineering specifications for the mechanical part to be manufactured. We proposed unique CAM system for a personal computer that can define the geometric shape in an ease manner and machine the sculptured surfaces of a mold cavity. In this paper, the theoretical basis of generation of high precision machining data for a mold cavity is obtained. The first is geometric modelling, and the second is high precision machining with an optimized tool path algorithm satisfying given tolerance limits. Especially, the bicubic Bezier basis function is adopted for a geometric modelling.