NC PROGRAM PREPARATION METHOD OF INTERACTIVE NUMERIC CONTROLLER OR AUTOMATIC PROGRAMMING APPARATUS

摘要

This invention relates to a method of preparing an interactive numeric controller program for a 2-spindle 2-turret 4-axis lathe on the basis of the shapes of a product and work which undergoes primary and secondary machining. The point between the primary and secondary machining processes is determined (S1, S2, S3) on the basis of the data of the inputted shape constituent elements of the product and work. This point in the NC program is selected (S4-S10) so that the time necessary for the primary and secondary machining is substantially equal. In this manner the NC program for the 4-axis lathe having high efficiency can be prepared.