The Principle of Minimum Energy Dissipation in Metal Cutting

Abstract

In this chapter based on experimental and theoretical studies, a principle of minimum energy dissipation is suggested as a basic physical law restricting the process of metal cutting. The principle may be summarized as that the state parameters of a cutting process, under the precondition of satisfying the constraints set by controlling (technological) parameters, always minimize cutting power consumption. On account of this principle, the basic law of cutting mechanics has been deeply studied. The results of theoretical analysis and predictions are verified and supported by experimental facts, and agree with people’s traditional understanding and knowledge about cutting process. Besides giving a general description of the principle of minimum energy dissipation, this chapter focuses on the principle of minimum energy dissipation for the cutting process of an elementary cutting tool, as a basis for further study of the cutting performance of modern complex shaped cutting tools.