METHOD AND DEVICE FOR PREPARING NUMERICAL CONTROL DATA, AND NUMERICALLY CONTROLLED MACHINE TOOL

摘要

PROBLEM TO BE SOLVED: To make numerical control data preparable corresponding to the definition of the state of the machining process of a work and the settings of machining conditions from CAD(computer aided design) data on which the preparation of numerical control data on the work is based. SOLUTION: Comment data representing the kind of machining conditions of the work are set previously in graphical element units of CAD data (step S201). A graphic element forming a closed area as a figure among the set graphic elements is extracted and its comment data is interpreted (step S202). Machining data corresponding to the interpretation result is added to machining data that the graphic element forming the closed area has (step S203) and the machining data to which the machining data is added is interpreted (step S205). According to the interpretation result, numerical control data is generated and when the said comment data represents a state of machining from halfway height of the work, a minimum tool track needed to machine the work is calculated (step S206).