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INFLUENCE OF THE STRUCTURE OF MINERAL-CERAMIC ABRASIVE MATERIAL ON THE OPERATIONAL PARAMETERS AND MORPHOLOGY
OF THE TREATED SURFACE
Authors: A.N. BOLOTOV, Dr. Sc., V.V. NOVIKOV, Cand. Sc., O.O. NOVIKOVA, Cand. Sc.
Abstract: As a result of the studies carried out, the influence of the structural components of the new diamond-containing mineral-ceramic material on its working properties was evaluated. The volumetric cutting ability of a diamond-containing tool, which is stable in the process of abrasive wear, increases nonlinearly with an increase in the grain size of diamonds and slightly decreases with an increase in their concentration. The morphology of the working surface of the abrasive tool practically does not change during operation. It has been established that the roughness of the treated surface increases when using diamonds of larger fractions. With an increase in the concentration of diamonds in a tool made of a mineral-ceramic material, the parameter of the surface profile Ra of the workpiece does not decrease linearly. An empirical dependence of the parameter Ra of the treated surface is proposed. It has been established that abrasive tools made of diamond-containing mineral-ceramic material in the process of operation realize the mode of self-sharpening.
Keywords: mineral ceramic materials, diamond-containing tools, friction, wear, roughness.
ELECTRICAL CONTACT PROPERTIES OF THE MATERIAL CONTAINING REFRACTORY COMPONENTS. COMPOSITE COPPER – CHROMIUM CARBIDE
Authors: V.V. IZMAILOV, Dr. Sc., M.V. NOVOSELOVA, Cand. Sc.
Abstract: The results of a study of the electrical contact characteristics of a composite powder material on a copper base with different contents of chromium carbide are presented. The electrical resistivity, hardness and electrical erosion wear of the studied samples are presented in absolute values and in comparison, with similar characteristics of the reference material – electric copper. The effect of the sintering temperature of the carbide-containing composite material on its electrical contact properties, as well as the dependence of the electroerosive wear on the polarity of the sample (sample – anode and sample – cathode) was investigated.
Keywords: composite material, copper, chromium carbide, electrical conductivity, electroerosive wear, sintering temperature
ON ELECTRIC EROSION WEAR AND ENERGY BALANCE
IN ELECTRIC PULSE DISCHARGE MODE
Authors: V.V. IZMAILOV, Dr. Sc., M.V. NOVOSELOVA, Cand. Sc.
Abstract: An assessment of the applicability of the thermal concept of electrical erosion to comparative tests of electrical contact materials for electrical discharge wear resistance in a pulsed discharge mode is carried out. A comparison of the values of specific erosion obtained experimentally and by theoretical calculation is presented. It is noted that to obtain a quantitative agreement between the experimental and theoretical estimates, it is necessary to use a semi-empirical approach, in which the parameters determined experimentally are used in the theoretical calculated dependences. The results of testing monolithic and composite specimens for electroerosive wear resistance confirmed that the Palatnik criterion, which combines a set of thermophysical characteristics of the electrode material, can be used for comparative assessment and selection of materials for contact parts.
Keywords: electroerosive wear resistance, pulse discharge, Palatnik criterion, energy balance, specific electrical erosion.
MONITORING OF THE STATE OF FRICTION UNITS BASED
ON THE ANALYSIS OF LUBRICANTS
Authors: A.M. MIGRANOV, Postgraduate, M.Sh. MIGRANOV, Dr. Sc., R.G. NIGMATULLIN, Dr. Sc., S.R. SHEKHTMAN, Dr. Sc.
Abstract: A digital system for monitoring equipment has been developed and implemented, which includes dynamic recording of the amount of wear products and oil temperature by original modern recording devices with subsequent technology for their processing and use. The system allows you to search for the necessary information about the operation of controlled equipment in large data sets. The advantages of a digital equipment monitoring system are the ability to predict the reliability of equipment operation; reduction of production risks and significant reduction of ineffective costs.
Keywords: digital monitoring system, lubricants, quality, performance, defects, monitoring, equipment.
HINGED FORK GROOVE PARAMETERS MEASURING
Authors: A.P. ARKHAROV, Cand. Sc.
Abstract: The relevance of the research topic is noted. Analysis of the known methods and devices for measuring the parameters of grooves that are not conjugated with the base surface of the part is done. Significant deficiencies are identified. The description of the proposed method and device for hinged fork groove measuring is given. Comparative analysis of the developed method and device with similar known designs and solutions are carried out. The development originality and the achieved technical result are reflected in this work.
Keywords: measurement, groove, fork, accuracy, positioning, method, device.
CONTROL OF THE CRYSTALOGRAPHIC TEXTURE
OF STEEL SHEETS USING FILM MAGNETOELASTS
AND MAGNETIC SUSPENSION
Authors: S.E. ILYASHENKO, Cand. Sc., L.E. AFANASIEVA, Cand. Sc.
Abstract: The results of experimental studies of the crystallographic texture of steel sheet products by the anisotropy of magnetic parameters are presented. To visualize the stray magnetic fields, we used film magnetoelasts and a magnetic suspension. It is shown that the contrast of images of a Korzunin rhombus above a steel sheet with a ribbed texture in magnetoelasts with a microencapsulated magnetic fluid is comparable to the contrast achieved with liquid magnetic suspensions. These field indicators can be used to qualitatively detect anisotropy in sheet materials and determine the axes of easy magnetization.
Keywords: steel sheet products, texture, anisotropy, Korzunin's rhombus, magnetoelast, ferromagnetic suspension.
CALCULATION OF THE MOMENT OF RESISTANCE TO MILLING
A PEAT LAYOUT WHEN THE MILLER HITS A STUMP
AND DETERMINATION OF THE ACTIVE WIDTH OF THE WORKING BODY
Authors: А.L. YABLONEV, Dr. Sc., N.M. ZHUKOV, postgraduate
Abstract: One of the main operations of the milling method of peat extraction is milling. Drying depends on the quality of the milling, and, accordingly, the entire subsequent production process. The presence of wood inclusions in the peat deposit greatly complicates the work. The sharply increased moment of loading, which occurs when the cutter hits the stump, is able to deactivate both the transmission elements and the drive of the milling unit. Therefore, at the design stage, it is necessary to take into account the dynamic loads arising from the meeting of the cutter with wood inclusions. Attempts to describe a similar fact were previously undertaken by various authors, but due to mathematical and methodological errors, they were not crowned with success. In this article, an attempt was made to «work on errors», which allowed, taking into account all the previous errors and inaccuracies, to achieve the desired result.
Keywords: milling, peat, timber content, wood inclusion, cutter, cutter knife, impulse preservation law, moment of resistance to milling, active width of the cutter.
GENERALIZED DEPENDENCES OF THE OPERATIONAL PARAMETERS
OF THE CONVEYOR ON THE CYLINDRICAL STIFFNESS
OF THE LOAD-BEARING BELT
Authors: V.P. DYACHENKO, Cand. Sc.
Abstract: The article presents generalized to a wide range of conveyor belts analytical dependences limit operating parameters of the pipeline, which in areas with low tension loss occurs form the gutter, from the cylindrical stiffness of the load-carrying belt and its structural and physical-mechanical properties. The results of calculations on these dependences for a range of modern rubber-fabric and rubber-wire belts are presented. The obtained results can be used for the verification calculation of the minimum allowable belt tension and the maximum allowable belt deflection, which usually occur in the loading zone of the conveyor and are the starting value when constructing a tension diagram during the traction calculation of the conveyor. The obtained dependencies are especially necessary for determining the parameters of the transition sections of belt conveyors.
Keywords: belt conveyor, operational parameters, transition sections, conveyor belts, minimum tension, deflection, physical and mechanical characteristics.
AUTOMATIC TRANSFUSION ANALYZER OF HYDROGEN CONCENTRATION IN MULTICOMPONENT GAS MEDIAS
Authors: L.V. ILYASOV, Dr. Sc.
Abstract: The results of automatic transfusion hydrogen concentration analyzer development of in multicomponent gas media are presented. The essence of the analyzer operation is stated, which for the first time uses the method of hydrogen volume differential concentration measurement in hydrogen-containing gases transfused by determining the total volume concentration of undetectable components. The scheme of an automatic analyzer, implemented on the basis of an industrial flow chromatograph, is described, which includes a measuring and comparative transfusion cells equipped with fluoroplastic membranes with selective permeability for hydrogen molecules, and a thermoconductometric detector included in chromatograph. Dependencies describing the analyzer signal and technical characteristics of the implemented analyzer are given. The expediency of using the pulsed method of introducing a sample of the analyzed gas and the cyclic operation of the analyzer is descussed. It is concluded that the differential transfusion measurement of the total volumetric concentration of undetectable components when using a thermoconductometric detector provides a 5…10 times decrease in the measurement error of the hydrogen concentration.
Keywords: automatic transfusion analyzer, hydrogen, volume concentration, differential measurement method, undetectable components.
ACKNOWLEDGEMENT PROCESS RESEARCH
UNDER THE PHYSICAL MODELLING OF SOUND SIGNALING
Authors: O.L. AKHREMCHIK, Dr. Sc., I.I. BASULEV, Sen. Lecturer
Abstract: Questions of modeling and generation of a set of sound signals of technological signaling on the physical model are considered. During prototyping researches of an operator response time and execution of the sequence of actions by the operator when using different types of sound signals are conducted. The author's technique of a research includes preliminary selection of signal type and correction of signal parameters during the experiment. Sound signals are synthesized with use of method of frequency modulation. Experimental data processing showed that it is necessary to reject a hypothesis of the normal distribution of time of handshake in favor of an alternative about the logarithmically normal law. The made experiments testify to need of individual selection and setup of sound signals for the systems of technological signaling.
Keywords: sound signal, operator, system, signaling, checking, control, parameter.
EXPERIMENTAL RESEARCH OF THE GAS COMPRESSION CHAMBER THERMAL REGIME OF THE COMPUTER EFFUSION DECREASING DISCHARGE PRESSURE GAS DENSITY ANALYZER
Authors: L.V. ILYASOV, Dr. Sc., S.Yu. ZHIGULIN, engineer, N.I. IVANOVA, Cand. Sc
Abstract: The article is devoted to the results of the research of the gas compression chamber thermal regime of the computer effusion decreasing discharge pressure gas density analyzer. The mathematical description of the effusion gas density transducer and its assumptions are given. An experimental setup for studying of the gas compression chamber thermal regime of the computer effusion decreasing discharge pressure gas density analyzer and its operation is described. The results of temperature measurements in the analyzer chamber during experimental studies simulating the process of the analyzer operation on the developed installation for a number of gases are presented. The maximum temperature changes during the analysis process and its duration are determined, conclusions are drawn about the influence of temperature changes on the accuracy of gas density measurements by the developed analyzer and about the necessity to use a temperature stabilization system in the design of effusion gas density analyzers.
Keywords: еffusion, analyzer, density, gas, computer, mathematical description, temperature.
APPLICATION OF BLOCKCHAIN TECHNOLOGY IN INDUSTRY
AS PART OF INDUSTRY 4.0
Authors: Ya.A. NESTEROV, Postgraduate, N.A. SEMENOV, Dr. Sc.
Abstract: The article studies the ways of applying blockchain as a part of Industry 4.0. It considers various options of blockchain industrial usage, reviews the phenomenon of quasi-blockchain and words out the criteria of blockchain industrial application.
Keywords: blockchain, information technologies, quasi-blockchain, knowledge-based organizations, industrial production.