Described in the textbook theoretical bases, organizational aspects of technical service of machinery and equipment, and the use of resource-saving technologies of recovery and strengthening. Methods are described for the deposition of coatings of various functional purposes, equipment and materials. Summarizes the results of theoretical and experimental studies of domestic and foreign researchers. Reviewed test methods and properties of the coatings, and given the scope of their effective use at the enterprises of technical service. Meets the requirements of Federal state educational standard of higher education of the last generation. Addressed to students of undergraduate and graduate students by specialty "Agroengineering" and technical workers agricultural, engineering, power, metallurgical and other industries.

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Currently, in connection with obtaining the unique properties of the surface layers of materials, special attention is focused on the theoretical and practical aspects of the technology of hardening and restoration, using both diffusion saturation and concentrated energy flows. The monograph deals with the issues of chemical-thermal and laser processing of tools and parts of transport and technological machines. It can be used in the study of disciplines "materials Science and technology of structural materials" and "Modern methods of strengthening materials" areas of training "Agroengineering" and "Technology of production and processing of agricultural products" (bachelor), as well as undergraduates, graduate students and specialists working in the field of agricultural engineering, mechanical engineering, metallurgy and surface engineering.

The paper considers the mathematical model development technique to build a vector field of the shape deviations when machining flat surfaces of shell parts on multi-operational machines under conditions of anisotropic rigidity in technological system (TS). The technological system has an anisotropic rigidity, as its elastic strains do not obey the accepted concepts, i.e. the rigidity towards the coordinate axes of the machine is the same, and they occur only towards the external force. The record shows that the diagrams of elastic strains of machine units are substantially different from the circumference. The issues to ensure the specified accuracy require that there should be mathematical models describing kinematic models and physical processes of mechanical machining under conditions of the specific TS. There are such models for external and internal surfaces of rotation [2,3], which are successfully implemented in practice. Flat surfaces (FS) of shell parts (SP) are both assembly and processing datum surfaces. Therefore, on them special stipulations are made regarding deviations of shape and mutual arrangement. The axes of the main bearing holes are coordinated with respect to them. The joints that ensure leak tightness and distributed load on the product part are closed on these surfaces. The paper deals with the analytical construction of the vector field F, which describes with appropriate approximation the real surface obtained as a result of modeling the process of machining flat surfaces (MFS) through face milling under conditions of anisotropic properties.

In engineering technology there is always a problem to improve the accuracy of manufacturing parts. When machining, the arising forces cause both tool and work-piece displacements. In this paper we consider the influence of changing cutting forces on the machining errors that arise in face milling of flat surfaces. With this approach to machining, the cutting forces depend on the work-piece width, the cutter diameter, the number of teeth and their geometry, the mutual bracing of the cutter and the work-piece, and the application point of the resultant force. The paper presents the dependences, allowing us to calculate the cutting force in face milling. The proposed model allows us to determine the vector of deviations in the instantaneous (fixed in time) arrangement of the cutter teeth at the specific points of the surface machined, since different cutting forces act on each tooth on the arc of the contact with the surface. It is recommended that the resulting errors arising from the elastic deformation of the technological system should be evaluated by the vector field, which represents deviations of points of the real surface profile from their nominal position, due to action of the variable cutting forces within one turn of the cutter.