Dissipative Structure of Contact Interaction When Cutting Metals

Abstract

Processing of metals cutting proceeds in the system of non-equilibrium processes including high-speed plastic deformation of the cutoff layer, contact and frictional interaction of the processed material with the asymmetric cutting wedge and its wear. The synergetic algorithm of development of the non-equilibrium process provides the formation of dissipative structures which arise in the system of cutting of metals. The structure and mechanisms of functioning of a dissipative structure of contact and frictional interaction opening new approaches of the management of processes of cutting and quality of machining are considered. The dissipative structure includes the insular and continuous outgrowths covered with the adsorbed and amorphous superficial films, and also the deformation strengthened layer outgrowths. Dissipation is connected with the production of entropy and is carried out due to the work of frictional interaction on a forward surface of the cutting wedge and is defined by friction coefficient size between the sliding shaving and an external surface of outgrowths. The total coefficient of friction is defined by such dissipative structure and spontaneously reaches such sizes at which the density of thermal stream and tension in the zone of frictional interaction extend on the area of primary plastic deformations and minimize deformation processes of shaving formation and work in the shift plane. Varying the modes of cutting and the external technological environment when cutting materials, it is possible to influence actively the dissipative structure for ensuring the necessary quality and productivity of machining.