Method and program for calculating maximum depth of cut without self-excited vibration of cutting tool

A computer-readable storage medium component embodying a program, the program for calculating a maximal depth of cut that corresponds to a stability limit of a milling self-excited vibration, in consideration of a machining condition, the rigidity of a machining tool, the machinability of a material, the program effecting:

• means for firstly setting an initial value for the machining-surface-perpendicular depth of cut, by utilizing as input values the curvature radius of a machining surface, a tool radius, a pick feed, the gradient angle between the machining surface and a rotation axis of the tool, and the number of tool edges;
• means for, based on the initial value, obtaining a milling start angle and a milling end angle for a cutting edge;
• means for calculating machining-surface-perpendicular depth of cut that causes no self-excited vibration;
• and means for calculating the maximal depth of cut that corresponds to the stability limit of a milling self-excited vibration, by repeating the calculation while modifying the initial value until the difference between the initial value and the calculation result becomes a given value or smaller, the maximum depth of cut being utilized a parameter of a milling operation.