Системні уявлення щодо механічної обробки деталей з наплавленим покриттям

Abstract

The issues of mechanical processing of parts with clad surface layer are considered. The general concepts of the system approach to the complex technical system, which is the machining of welded parts with the function of manufacturing a coated part with minimal costs in accordance with the requirements for the quality of the finished product, are proposed. The rule by which the decomposition of the system is made is defined: the objects of the lower level of decomposition of the system of processing of the clad surface layer are the elements that determine the parameters of interaction of the tool with the part and the cutting modes. It is shown that to describe the processing system of a coated part, it is enough to consider a conditional information system containing simulation and natural models - random excitation, wear of the cutting tool, the formation of micron irregularities on the machined surface, as well as the formation of technological characteristics of the machining process. A variant of the decomposition scheme of the cladding processing system is presented. The model of random excitation, which is directly related to the processed clad product, is three-level and is caused by the rigidity of technological equipment, devices, tools and parts, the presence on the surface of the coated product of macro- and microirregularities, deviations in the shape of the product and, due to these features, contact with the cutting tool, inhomogeneity of the structure and mechanical properties of the deposited material. The order of the synthesis of the system of the process of mechanical processing of welded parts is determined by the solution of the morphological problem, which is built according to the given decomposition scheme and regulates the sequence of solving problems at each level of decomposition, taking into account the indicators of interaction between the elements of the system.