Viacheslav V. Maksarov

Saint Petersburg Mining University · Department of mechanical engineering

The paper considers a problem of providing required surface roughness of rod component during processing by means of forecasting dynamic characteristic of machine works with computer modeling taking into account transitional process. The role of the transitional process is performed by a modified structure in the surface layer of the blank created...

This paper describes the results of research in forming the condition of geometrically-complex surfaces during processing blanks of corrosion-resistant material. It has been established that the most efficient solution for this issue is application of finishing in preliminary preparation of a cutting tool that is later used for production of the ge...

The work suggests a method to inspect the profile and micro-relief of thread surface using a light-field optoelectronic system based on a digital camera with a collection of microlenses. The authors have developed an optical scheme to record 3D images of the profile and micro-relief of the controlled thread surface. The system involves computer tec...

The article considers matters related to the problems that arise during machining of mating surfaces and bed shears by fine milling with tools equipped with ceramic cutting bits on the basis of the analysis of the surface layer quality requirements and current quality assurance technologies. Research results have shown that one of the quality impro...

The high-rpm rotors were subjected to the dynamic analysis. Oscillations of a rotor spinning in gapped bearings were considered. It was stated that the rotor necks motion pattern depends on a lot of factors: a ratio of static and dynamic loads on the bearing, radial clearance size, presence of oil film between a neck and a bearing, elastic and iner...

The present paper states the impact of a technological system on piece's roughness and shape accuracy via simulation modeling. For this purpose, a theory was formulated and a mathematical model was generated to justify self-oscillations in a system. The method of oscillations eliminations based on workpiece's high-energy laser irradiation with the...

The paper addresses the characteristics of stepped surfaces of parts categorized as "solids of revolution". It is noted that in the conditions of transition modes during the switch to end surface machining, there is cutting with varied load intensity in the section of the cut layer, which leads to change in cutting force, onset of vibrations, an in...

The present article considers the possibilities of magnetic-abrasive finishing technology with regards to increasing the quality of geometrically-complex products. The experimental research on magnetic-abrasive finishing technology which resulted in obtaining mathematical relation is described and the influence of technological factors of magnetic-...

The article highlights the issues of determining the stability of the cutting process by a multipoint cutting tool equipped with cutting ceramics. There were some recommendations offered on the choice of parameters of replaceable cutting ceramic plates for milling based of the conducted researches. Ceramic plates for milling are proposed to be sele...

Application of polymeric composites in friction assemblies of oil-well pumps is studied. A scheme is proposed for testing specimens from a variety of composites in a steel roller pair, for which the area of the wear spot is taken as the wear resistance criterion. The best results are obtained for specimens from polyamide reinforced 50% with high-mo...

The article considers the problems of forecasting the performance of cutting tools equipped with replaceable ceramic cutting bits. It is proposed to forecast the operability of ceramic tools on the ground of dependence between its performance characteristics and the microstructural parameters of the tool material. It is proposed to determine the pa...

The paper considers the application of wear resistant coatings by methods of gas thermal and flame spraying. It demonstrates the relationship between adhesion strength of the sprayed coating and surface roughness after abrasive jet machining using piston rings with steel-molybdenum coating as an example. The authors consider the results of studies...

This work examines the simulation of chip formation during the process of cutting. An analysis of complex rheological models enabled a set of assumptions to be considered, thereby substantiating a hypothesis relating to the chip formation process. The studies demonstrated that the chip formation process, taking into account the plastic deformation...

The application of coatings based on fluorocarbon polymer composition, frictionmechanical brass, fullerene C60 and surface treatment of vibrorolling with the regular roughness for the protection of heavily loaded mating parts of machines, working in conditions of frettingcorrosion. Studied the mechanisms of friction of coating, which will considera...

The article examines the forecasting performance of the cutting tool equipped with interchangeable plates of carbide oxide ceramics (A2 – mixed ceramic), by definition porous ceramic tool material affecting its cutting properties. Set correlation of porosity ceramic tools from electrical resistivity removable ceramic plates. Cutting tools having la...

The mathematical modelling of the process system allows carrying out research into the selection and optimisation of machining conditions. The conceptualization of the operator that represents the dynamic characteristics of the cutting and friction process is an important issue in the development of the mathematical formulation of the interaction b...

The paper focuses on testing the utility effect of a cutting tool holder with inserted alternate bars of different material structure in its construction. The different bars are made from rolled steel and have an anisotropic structure which also has different mechanical properties. This construction is considered as a method to improve the cutting...

The article introduces new results on designing multilayer cutting tool holder. Experimental study of metal turning process workpieces shows efficient dynamic damping of oscillations. The coefficient of oscillations absorption and damping is increased due to large dissipative force of the material holder oriented in different deformation directions...

The article deals with the problems of improving quality of parts machined on lathe type machine tools. Improvements are suggested by predicting the operability (tool life parameter) of cutting tools equipped with replaceable ceramic inserts. It is proposed to forecast the operability of ceramic tools on the ground of relation between operational c...

The article has indicated the principle scheme for post-harvest processing of cultural berries according to the possibilities of the developed new berry sorter. The article tackles the constructive features of the post-harvest treatment of berries as well as of the belt sorter that functions on the principle of successive sorting method. The aim of...

The article considers the improvement of machining process, namely thread cutting with screw taps, improving quality and stability of roughness of the thread surfaces of high speed cutting steel tools. A scheme of magnetic abrasive polishing and a method of selecting operating conditions of screw taps machining. In the process of elaborating the co...

The article proposing a new technology for manufacturing of vibration-proof tool with multilayered damping tool holder. Desired damping effect is obtained by anisotropic properties of tool holder plates, as a result from machining by pressure a source material. The experimental research in the piece processing allows to provide effective dynamic ab...

The treatment of complex products from hard materials is accompanied by loss of stability of the cutting process, which leads to oscillations which cause an increase in the wear rate of cutting tools, reducing the longevity of the machine actuators, which ultimately affects the quality and accuracy of processing responsible products. The developmen...

The present paper discusses mathematical modelling with regard to deformation processes resulting from chip forming and removal when cutting heavilyprocessed materials in a condition of non-homogeneous stress state, which can evoke undesirable self-excited oscillation. By describing the chip forming and removal process a synthesized rheological mod...

The growth in unit power of nuclear and thermal power plant equipment imposes high requirements on quality of parts for power machine building, especially on one of the most vulnerable components of designs - threaded fastening connections, which dictate the serviceability and operational reliability of designs. In this connection the 'Izhorskii pl...

Theoretical and experimental studies of the behaviour of the technological system of machine tool with the cutting-edge machining of blank with the local action are given. In the research paper one of the most effective methods is proposed, which makes it possible to reliably control the process of continuous chip breaking; the creation of prelimin...