Methods of generating data for numerically controlled machine tools

摘要

A method of generating data defining a tool path for a numerically controlled machine (14) is designed for generating machining tool path data without establishing offset plane data, so that the machining tool path depth data can be established for discontinuous, surfaced, offset planes which might otherwise cause interference in the tool path. The method includes the steps of forming a plurality of patches defining a three-dimensional plane to be machined, sub-dividing each patch into a predetermined number of segments as divided by a plurality of grid points so that the distance is maintained to be smaller than the machining area of the machine tool (14). The machining depth at each grid point within the tool path is derived with respect to the maximum height position at which the machining tool comes into contact with the grid point. The machining depth is modified with a correction value which is determined in terms of the surface condition of the surface to be machined.