Дзюра В. Scientific foundations of quality parameters assurance of bodies-of- rotation-type machine parts working surfaces

In the dissertation work new scientifically substantiated results of the decision of the scientific and applied problem of providing parameters of quality of working surfaces of details of machines in the form of bodies of rotation taking into account the complex approach and operating conditions by optimization of structure of technological processes on quality parameters and maintenance of progressive modes of processing are received. At the same time, the quality parameters of the surfaces that ensure their operational properties are proposed to provide an inexpensive PPD operation with the formation of regular microreliefs, which will eliminate the cost of finishing technological operations from the structure of the TP. A method for determining the influence of technological heredity on the accuracy of the cross-sectional shape of cylindrical surfaces obtained in operations of the technological process, as well as a method for probabilistic evaluation of the impact of feed on the microgeometry of the surface formed by turning. The main regularities of the influence of shapes and sizes of cylindrical surfaces on the roughness parameter are established. A new mathematical model of the dynamic process of forming a regular microrelief by vibratory rolling on the inner cylindrical surface is developed, taking into account the force characteristics of the process and the kinematics of the motion of the deforming tool. Using the block approach, many variants of new mathematical models are obtained and a classification of partially regular microreliefs formed on the end surfaces of parts of the class "bodies of rotation" is developed, which take into account their geometric characteristics. A method of forming a partially regular microrelief on the end surfaces of parts of the class "body of rotation", which provides the same relative area at different distances from the center of rotation, and analytical dependences for determining the amplitude of V-shaped grooves for microreliefs I and II. Designs of tools for processing by cutting of internal cylindrical surfaces and formation of regular microreliefs are offered. The software for construction of mathematical model of a profile of a roughness of a surface on the basis of parameters of a profilogram is developed. Research materials, calculation methods are transferred for use by machine-building enterprises.