CNC Turning Lathe Machining with roughly the same, but the tool of choice, the choice of cutting parameters and workpiece clamping and other technology issues also have their own characteristics.

An optimization mathematical model of cutting elements is founded by technical requirement and forced condition when turning. The optimum of cutting elements is got by using penalty function method.

The machine time for turning depends on the selection cutting parameters that affect the cost of turning, so a study of machine time for turning is necessary.