The Dependence of Tool Wear and Quality Parameters of the Surface being Cut on Dynamic Characteristics

Introduction. It is known that the wear and quality of the parts surface change during the cutting process. These changes depend on the dynamic cutting system. Studies are also known in the field of the dynamics of the cutting process, in which stability problems of various attractive sets of deformation displacements formed in the vicinity of the trajectories are considered. The bifurcations of attracting sets are analyzed, including those associated with the release of energy in the cutting zone. However. a study of the relationship between the evolutionary restructuring of the system and the output properties of the cutting process in the unity of the wear rate of the tools and the geometric surface topology l'onned by cutting is not performed. The provisions of evolutionary transformations of a dynamic cutting system for the case of analysis of the output characteristics of the cutting process are developed in the paper. The purpose of research is to disclose the relationship of the evolutionary adjustment of the dynamic cutting system with the tool wear resistance and a change in the geometric topology of the surface formed by cutting to ensure the required output processing characteristics. A method is proposed, and the results of studying changes in the wear rate, the amount of wear. and changes in the geometric topology of the surface formed by cutting depending on the initial technological conditions and the dynamic parameters of the system during evolutionary adjustment are presented. The research methods are: mathematical simulation of evolutionary transformations based on the representation of the dependence of the dynamic coupling parameters formed by the cutting process, in the form of its dependence on the power path of irreversible transformations at the interface nodes of the tool faces with the workpiece and the cutting zone. In this case, the conversion of power into the tool wear rate and the change in the geometric surface topology are considered. Results and discussion. Dependences of wear and surface geometry on the evolutionarily changing properties of a dynamic cutting system are disclosed. The task is to coordinate the designed trajectories with the internal evolutionally changing dynamics of the system to increase processing efficiency. The research results are promising especially for processing parts with complex geometric profiles, as well as parts whose stiffness matrices vary along the tool path.