Cutting-parameter selection for maximizing production rate or minimizing production cost in multistage turning operations

In this paper, an investigation of optimal cutting parameters for maximizin g production rate or minimizing production cost in multistage turning opera tions is reported. A machining model is constructed based on a polynomial n etwork. The polynomial network can learn the relationships between cutting parameters (cutting speed, feed rate, and depth of cut) and cutting perform ance (surface roughness, cutting force, and tool life) through a self-organ izing adaptive modeling technique. Once the geometric model for machined pa rts and various time and cost components of the turning operation are given , an optimization algorithm using a sequential quadratic programming method is then applied to the polynomial network for determining optimal cutting parameters. The optimal cutting parameters are subjected to an objective fu nction of maximum production rate or minimum production cost with the const raints of a permissible limit of surface roughness and cutting force and a feasible range of cutting parameters. (C) 2000 Published by Elsevier Scienc e S.A.