Computer aided optimisation of cutting conditions in multicut turning operations

ABSTRACT COMPUTER AIDED OPTIMISATION OF CUTTING CONDITIONS IN MULTICUT TURNING OPERATIONS BAYKASO?LU, Adil M. Sc. In Mechanical Engineering Supervisor: Assoc. Prof Dr. A. İhsan Sönmez May 1995, 119 pages In this study, a computer program is developed for the optimisation of cutting conditions in turning operations such as; roughing, boring, facing, drilling, threading, grooving and parting-off. By using minimum cost criterion as the objective function a direct search procedure is used for the optimisation of cutting conditions in turning operations namely; roughing, boring and facing. For the other operations which are drilling, threading, grooving and parting-off feasibility check methods are used for the optimisation of cutting conditions. The following costraints were considered in the optimisation: maximum and minimum depth of cuts and feeds for the tool and workpiece materials, maximum allowable tool force, holder strength and rigidity, spindle and feed-drive motors torque-speed characteristics, work holding limitations, deflection of the workpiece, geometrical accuracy, bearing design loads, cutting tool velocities, tool wear and surface roughness. The program is written in Turbo C++ and CLIPPER programming languages on an IBM compatible personal computer. The use of the system is illustrated with practical examples. Key Words: Metal cutting in turning, Optimisation, Cutting Conditions HI