Method of generating a numerical control program, apparatus for the same, and program for causing a computer to execute the method

A non-transitory computer readable medium storing a program for causing a computer to execute a method of generating a numerical control program in which, based on sectional shape data of a product to which a relief processing is to be performed, a numerical control program for turning-processing the product is generated, the method comprising:

• extracting groove shape data from the sectional shape data;
• calculating an intersection of a line segment parallel to a turning axis and a line segment that is not parallel to the line segment as a corner of the sectional shape data;
• recognizing the groove shape data as a relief sectional shape in a case where dimensions of a frame which includes from the corner to the groove shape data are within predetermined dimensions such that the extracted groove shape is in a vicinity of the corner without overlap with the corner;
• determining a relief shape pattern of the recognized relief sectional shape from among a plurality of relief shape patterns which are processed by a turning tool bit based on whether the relief sectional shape is equal to or larger than the corner in at least one direction;
• generating a relief processing program corresponding to the determined relief shape pattern;
• and
• integrating the relief processing program into the numerical control program for the turning-processing.

An apparatus for generating a numerical control program which, based on sectional shape data of a product to which a relief processing is to be performed, generates a numerical control program for turning-processing the product, the apparatus comprising:

• a memory configured to store the section shape data of the product;
• and
• a processor configured to:
• execute a relief shape determining unit which extracts groove shape data from the sectional shape data, wherein the relief shape determining unit calculates an intersection of a line segment parallel to a turning axis and a line segment that is not parallel to the line segment as a corner of the sectional shape data, determines dimensions of a frame from the calculated corner to the groove shape data, and recognizes the groove shape data as a relief sectional shape in response to the determined dimensions of the frame being within predetermined dimensions such that the extracted groove shape is in s vicinity of the corner without overlapping with the corner;
• execute a relief shape pattern determining unit which determines a relief shape pattern with respect to the recognized relief sectional shape from among a plurality of relief shape patterns which are processed by a turning too bit based on whether the relief sectional shape is equal to or larger than the corner in at least one direction;
• execute a relief processing program producing unit which generates a relief processing program corresponding to the relief shape pattern that is determined by the relief shape pattern determining unit;
• and
• integrate the relief processing program into the numerical control program for turning-processing the product.