Metalloobrabotka № 5 (107)/2018

Pereladov A. B. Assessing the performance of the diamond tool with the modified bundle when grinding hard alloy

The aim of this study was to determine operational parameters of the grinding diamond tools manufactured with the use of a modified organic binder during the machining of workpieces made of hard alloys. During the tests, the performance of the designed grinding tool was evaluated using a structural filler introduced into the bundle as a modifier (abrasive grain grade 54C). The influence of the characteristics of the developed tool and its operating modes on the output of the processing

process in grinding a hard alloy was established. Studies have shown higher performance of the modified diamond tool in the investigated region of the factor space.

Key words: diamond tool, modified bond, grinding parameters of hard alloy.

Reshev E. Yu., Rasulov Z. N., Vinnik P. M. Yakovlev S. A. Investigation of active liquid coating for increasing quality of details from fuel materials

Niobium, molybdenum and alloys based on them are promising for use in radio electronics, aviation and rocket technology. This group of structural materials has: the ability to operate at temperatures from -195-1400 ° C; high specific strength; low temperature of the threshold of brittleness and the coefficient of thermal neutron capture and a number of other physical As part of the work to improve the technological processes for the manufacture of products made of niobium and molybdenum: the use of modification of the tool has made it possible to completely

eliminate the operations of inter-annealing, and also to introduce combined extraction through two matrices due to the reductio Refractory materials, fluoroorganic nanocomposite.

Keywords: residual stresses during punching, active lubricating coating, tool modifications, on of friction and

adhesion to the tool.

Titov A. V., Ermilova D. V. Features of the power parameters of springs from titanium alloys

Nowadays springs that are made of titanium alloy are the most promising. The article presents the results of an analytical study devoted to the characteristics of the power parameters of springs (plate and screw compression) made of titanium alloys VT23, VT16, TS6, in comparison with the force parameters of springs from other materials. The main influence on the force parameters of the plate and screw compression springs is exerted by the linear modulus of elasticity (E), the shear modulus (G) and the Poisson’s ratio ( ). Plate springs made of titanium alloyVT23 have a large margin of strength, but the compression force at working and maximum deformation, deformation

work and rigidity is significantly lower than that of springs of spring steel 60С2А and heat-resistant nickel alloy ХН77ТЮР. In this case, the tangential stresses arising in the screw compression springs, not depending on the material, in contrast to the normal stresses in the edges of the plate springs.

Keywords: spring, power parameter, titanium alloy, compression force, voltage

Grishin M. V., Pavlov P. Y., Sosnin P. I., Trushnikov V. E. Technological equipment of the process in instrument-modeling medium the WIQA

The article presents the means of ontological structuring and support of the production processes of pipeline systems. The proposed approach is focused on the creation and use of applied ontology, in the content of which the dependence of pipelines on the geometry of the product and the technological equipment of the production process is used. To select the «points» of the application of ontology, the analysis of the life cycle of creating pipelines was carried out. Research and development was carried out in the instrumental modeling environment of WIQA (Working In Questions and Answers).

Keywords: master geometry, precedent model, ontology, technological equipment, pipeline system.

Gavrilova V. S., Kosorukova O. V. Ensuring the rational roughness of friction surfaces of axial piston pumps with an inclined disk

The influence of the quality of the surface layer of the axial piston pump parts on the friction losses is considered. The reduction of the friction coefficient in the application of turning is mathematically justified. The recommendations to the technological support of the rational roughness of steel surfaces of friction pairs of axial piston pump due to the appointment of optimal modes of turning are proposed. The results of experimental studies of friction surfaces in the application of turning on the installation for friction evaluation are presented. The reduction of the friction coefficient during the processing of the steel surface by turning on the proposed processing modes is established.

Keywords: axial piston pump, the curve of the reference profile, turning, friction coefficient.

Logunov V. V., Amirhanov E. I., Novikov I. A. Improvement reliability technology of the shells and instruments

To improve the reliability and tribology for an electromechanics and mining engineering it is applied the deposition surfactant technology on metal details. This technology permits to modify surface metal, and to give it to her special properties. Dimensions of parts are preserved as the surfactant layer has a thickness of several tens of nanometers. It is described the application result of the Russian surfactant titled “MOKOM”. This surfactant was appliedto stamps and cutters, and sylphon compensators of different types. Comparison of test results has shown a significant increase of lifetime value and wear resistance for above technical objects.

Keywords: reliability, lifetime value, surfactant, sylphon compensator (bellows joints), stamp, cutter, wear resistance.

Esov V. B., Samoilov V. B., Nikiforov I. A., Klimochkin

O. Restoration of the straightness of the longitudinal movement of the lathe support 16K20F3

In the article methods and means of checking the geometrical accuracy of the movement of the longitudinal support of the lathe in accordance with the current normative and technical documentation are considered. As a result of the analysis, the authors showed that the existing methods do not provide the necessary information for estimating the accuracy of the movement of the working body in space. Further, the technique of reliable definition of the reason of emergence of a deviation from straightness at a lathe support reverse at longitudinal movement was offered. Experimental approbation was carried out and the main provisions were confirmed. As a result, application of the technique allowed to diagnose the turn of the support and to determine the place of formation of the gap in the guides. During the repair work on elimination of the gap, it was succeeded to reduce the reverse error associated with the mechanical part of the

machine from 15 μm to 6 μm.

Keywords: Straightness of movement, geometric accuracy, accuracy tests, accuracy standards.

Anikeeva O. V., Ivakhnenko A. G. The further development of the variation method to calculating the metal cutting machines geometric accuracy

In this paper the problem of revealing the stages of further development of the variation method to calculating the metal cutting tools geometrical accuracy is formulated and solved. The aim of the work is to determine the current state of the variation method to calculating the geometrical accuracy of machines and to identify the directions of its development. The basic variation method

to calculating the geometrical accuracy of metal cutting machines and the its development by the creator and authors of this work are considered. New directions of the development of the variation method to calculating the metal cutting machines accuracy are proposed. The most significant of which is the transition from consideration of the geometrical accuracy of only the machine itself to the consideration of the metal cutting system accuracy that includes a machine and a metal cutting tool. All proposed directions to development of the method can be divided into groups according to the criterion of linearized and nonlinear statement in the construction of precisionbalances. In the paper for the nonlinear formulation the sources of nonlinearities are identified. Regularities of their influence on the vector balance of the accuracy of metal-cutting systems are uncovered. The solution of the problem in the work serves as a methodological basis

for the work on the normalization and com pensation of geometric errors of machines, including to create the basis of standards for the accuracy of metal-cutting machines. The work is useful for scientists involved in the study of the geometric accuracy of processing on metal-cutting machines, as well as the normalization and compensation of geometric errors of machines.

Keywords: metal cutting machines, geometric accuracy, a variation method to calculate accuracy.

Sokolov Yu. A. Optimization of additive manufacturing

The article deals with the optimization of additive production. An optimal solution scheme is presented, which includes the solution of problems associated with the choice of the method of additive manufacturing; kinematic, structural and energy parameters of the installation; process structure and optimal processing modes.

Keywords: mathematical modeling, synthesis of products, optimization, additive technology.

Vasilkov D. V., Alexandrov A. S., Golikova V. V., Tarikov I. Ya. A brief report on the results of the first cycle of studies of residual stresses on the basis of additivity of the elastic aftereffect, the technological impacts on the workpiece

The article discusses the results of the first cycle of studies of residual stresses in the processing of cutting on the basis of established laws of additive aftereffect in the bulk parts and surface layers of friction pairs.

Keywords: Residual stresses, additivity, aftereffect, processed product, technological impact.

Schneerson E. Z., Maksarov V. V., Vasilkov D. V., Petrov V. M. Prof. Vladimir Veyts contribution to development of the modern theory of machine (to the 90 anniversary)

Numerous works of the prof. Veyts V. L. in the field of the theory of machine and mechanisms and nonlinear dynamics are a kernel of his scientific heritage. V. L. Veyts’s achievements reflect a wide range of interests of the scientist in this area - from development of the theory of fluctuations and dynamics of technological systems before creation of the new scientific direction on dynamics

of mechanical systems with significantly nonideal bonds. Memoirs are devoted to the 90 anniversary of professor Veyts — the outstanding scientist, the prominent teacher, the person from capital letter.

Keywords: theory of machine and mechanisms, dynamics of mechanical systems, professor, history.