Maximum and Minimum Depths of Cut Constraints

The maximum depth of cut constraint has relevance in roughing operations, while the minimum depth of cut constraint should be considered in finishing operations. The maximum limit on depth of cut due to cutting tool (d_max) is set to half the cutting edge length for inserts with included angles of 55^o or 60^o and for inserts with included an angle of 80^o - 100^o; d_max is set to two-thirds of the cutting edge length. The minimum limit on depth of cut (d_min) is set to 0.5 mm for last operations & 1 mm on depth of pocket, which is lower, for roughing operations. The depth of the cut constraints can thus be expressed as following:

Equation

                                         d_min < d  < d_max

Mathematical models might be developed by using these constraints and the extended Taylor's tool life equation to obtain more realistic & practical results for optimized machining process parameters.