NC DEVICE WITH AUTOMATIC THREE-DIMENSIONAL PROGRAMMING FUNCTION

摘要

PURPOSE:To obtain the same effect even for a free curved surface with evaluation in a real space while making the most of advantages of a CSG (Constructive Solid Geometry) system by storing a memory with shape data described in Polish notation in order and thus reducing the necessary memory capacity. CONSTITUTION:Shape data 20 on CSG basis uses function information on a surface which indicates a border and free curved surface data 23 is processed in a shape extraction processing part 40 together with space information from a process 44 corresponding to an application and further stored in a shape information stack area 46 together with information of an enciphered shape process 41. In this stack area 46, information on all primitive is stored. The store part of the shape data is arranged into one shape data in reverse Polish notation without being divided into body structure data and enciphered shape data, and the shape extraction processing part 40 judges the enciphered shape data 41, an operation code, or a free curved surface 45 and stores it in the shape information stack area 46, and entire shape information TS is outputted from this area 46.