Automated Control System of Technological Process of Applying Wear-Resistant Coating by Ion-Plasma Method

Abstract

An increase in labor productivity is realized due to a sharp increase in cutting speed and requirements for operability of the tool used. This requires fundamentally new solutions in design of machine tools and cutting tools, the use of more efficient tool materials, etc. One of the ways to increase the service characteristics of the tools used is to apply wear-resistant coating with special properties to their working surfaces. The use of wear-resistant coatings is of particular importance in conditions of modern production intensification. There are a lot of methods that can significantly improve operational characteristics of cutting tool. The ion-plasma method is a special case among them because it is implemented on vacuum installations equipped with electric arc evaporators of the metal which is the basis of coating. Coating a tool by this method is quite common also due to a number of positive properties: the purity of the coating composition (due to work in vacuum); nontoxicity of the method, the possibility of using the coating as a decorative one. This article considers the problem of improving the quality and efficiency of the automated control system for the installation of ion-plasma coating on metal cutting tools. Existing installations use fairly outdated and imperfect control tools. In addition the existing control systems model only certain stages of the coating process. Most often consideration is given to the distribution problem of heat fluxes in static in a tool to be heated without solving the problem of radial distribution of the temperature field. This paper proposed to apply Butkovsky method to simplify the solution of control problem of a tool heating process. It also proposed the general mathematical model of dynamics of all technology components (tool cleaning, coating and tool cooling). Based on mathematical models, processes control systems were created.