Numerical control apparatus having a machining program editing function for numerical control machine tool

A numerical control apparatus having a machining program editing function of a machining program for controlling a numerical control machine tool, which comprises:

• an input means for inputting machining step division codes and machining step identification codes;
• a definition means for defining machining step unit programs by dividing the machining program on the basis of machining step division blocks, as the machining step division blocks which use blocks in positions separated, by a specified number of blocks, from the blocks in which the machining step divisions codes are commanded;
• a means for extracting the machining step identification codes for each of the machining step unit programs and defining the extracted machining step identification codes as the machining step names of the machining step unit programs;
• a display means for arranging the machining step names on a screen according to the sequence of the execution of the machining step unit programs;
• a changing means for changing the locations of the machining step names according to commands input from outside;
• and
• a converting means for converting the sequence of the execution of the machining programs according to the locations of the machining step names thus changed.