Mechanics of Machines, Mechanisms and Materials最新文献

{"title":"INFLUENCE OF THE APPLYING MODE OF THE ANTIFRICTION COATING BY ULTRASONIC TREATMENT ON THE ROUGHNESS OF THE TREATED SURFACE","authors":"Albert V. Korolev, A. Korolev, A.S. Bondareva","doi":"10.46864/1995-0470-2024-1-66-43-49","DOIUrl":"https://doi.org/10.46864/1995-0470-2024-1-66-43-49","url":null,"abstract":"The article presents an experimental study of the effect of the ultrasonic diamond smoothing mode on the surface roughness of the roller bearing roller end face in the presence of graphite nanopowder on the treated surface. In the presence of graphite nanopowder on the surface, the diamond smoothing process is accompanied by the formation of a solid antifriction coating on the treated surface, which can affect the formation of the microrelief of the treated surface. The design of an ultrasonic installation is described for diamond smoothing of the rollers end surface with the possibility of simultaneous application of a solid antifriction coating to this surface. The installation is assembled on the basis of a 16K20 screw-cutting machine. It consists of a device for installing rollers in the chuck of the lathe and an ultrasonic transducer mounted on the caliper of the machine. A diamond tip was used as a working tool in this device which was attached to the end of the oscillation concentrator of the ultrasonic transducer. Axle box bearing rollers of 36-42726E2M series (GOST 18855-94) were used as experimental samples. The subject of research was regression dependences of the influence of ultrasonic processing mode on the treated surface roughness. Full factorial experiment method was used to conduct the research. The tool tip rounding radius, tool transverse feed, specimen rotation speed, and tool pressure force on the machined surface of the specimen were used as varying factors. The power-law dependence of treatment indices on the adopted varying factors was taken as a mathematical model. It is shown that the greatest influence on the surface roughness is exerted by the tool transverse feed and the diamond tip rounding radius.","PeriodicalId":276362,"journal":{"name":"Mechanics of Machines, Mechanisms and Materials","volume":"27 32","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140277188","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"FORMATION OF AN ALGORITHM FOR REGULATION OF RELIABILITY INDICATORS OF TECHNICAL SYSTEMS","authors":"K. V. Shchurin, Viktor E. Tarasenko, Valery N. Ednach","doi":"10.46864/1995-0470-2024-1-66-15-22","DOIUrl":"https://doi.org/10.46864/1995-0470-2024-1-66-15-22","url":null,"abstract":"Based on the analysis of the main factors influencing the reliability indicators of technical systems and ensuring their regulated performance, dependencies were formed to determine the extremum of economic efficiency indicators at a normalized value of the probability of failure-free operation. Based on an analysis of design, production and operation conditions, the parameters of the objective function were determined, including for restored objects. Regulation of reliability indicators was presented as a solution to a multifactor optimization problem. The problem of distributing requirements for the reliability of a complex technical system, consisting of statistically independent indicators of subsystems, was formulated as a conditional optimization problem. In relation to the regulation of reliability indicators and criteria for failures and limit states, factors were grouped according to the characteristics and internal indicators of the object of general classification characteristics, their stratification and ranking. The structure and procedure for preparing initial data was formed.","PeriodicalId":276362,"journal":{"name":"Mechanics of Machines, Mechanisms and Materials","volume":"68 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140279203","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CALCULATION FEATURES OF THE BENCH DYNAMIC PARAMETERS DURING TESTING OF THE MOTOR-WHEEL REDUCER OF BELAZ MINING DUMP TRUCKS","authors":"N. Ishin, A. Goman, A. Skorokhodov, Vladimir V. Shportko, Alexander V. Kovalenko, Tatsiana S. Lahvinets","doi":"10.46864/1995-0470-2024-1-66-5-14","DOIUrl":"https://doi.org/10.46864/1995-0470-2024-1-66-5-14","url":null,"abstract":"When conducting accelerated tests of transmissions and reducers of mobile machines, it is required to study the dynamic properties of the bench together with the test object installed on it. This is necessary to identify possible resonances in the oscillatory system and to select appropriate test modes, which exclude the occurrence of unacceptable levels of loads that violate the correspondence between the type and nature of damage in operation and during testing. The paper proposes a methodical approach to the calculational determination of the dynamic parameters (natural frequencies and natural modes of torsional vibrations) of the bench with a mechanically open loop during accelerated life tests of the two-row planetary motor-wheel reducers of BELAZ mining dump trucks, based on the study of the developed multi-mass dynamic model with lumped parameters. The calculation features consist in taking into account the existence of symmetry plane of the bench mechanical system with two reducers installed on it, as well as the presence of symmetrical branches in the planetary rows, formed by the masses of satellites rotating around their axes and elastic constraints connecting them with the sun and crown gears. The approach proposed makes it possible to significantly simplify calculations and to reduce the computation time.","PeriodicalId":276362,"journal":{"name":"Mechanics of Machines, Mechanisms and Materials","volume":"164 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140275198","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"MOTION CONTROL DYNAMICS OF TRANSPORT VEHICLE ON LONG DESCENTS","authors":"Victor Derzhanskii, I. Taratorkin, Alexander A. Volkov","doi":"10.46864/1995-0470-2024-1-66-23-28","DOIUrl":"https://doi.org/10.46864/1995-0470-2024-1-66-23-28","url":null,"abstract":"The article provides a rationale for the need to develop an additional braking control system for a transport vehicle to limit the movement speed under the action of rolling forces and to protect the engine from exceeding the permissible speed, “overshooting” the speed. Design options for four systems that dissipate kinetic energy are considered, and the effectiveness of their use is assessed: in periodically switched off clutches in the transmission; in a hydraulic retarder, containing a rotor and a stator, where kinetic energy turns into heat and is dissipated into the environment; in two complex hydrodynamic transmissions, the design of which integrates a torque converter and a hydraulic retarder. In the first version of the system, kinetic energy turns into heat when the transmission clutches are periodically turned on and off; in the second option, energy transformation is carried out in the retarder circulation circle containing the rotor and the stator; in the third embodiment, in an additional circuit of the circulation circle of the working fluid of a hydrodynamic transmission, containing a pump, turbine, reactor wheels and an additionally introduced fourth wheel, which can serve as the stator; in the fourth version, the pump wheel of the torque converter can perform the additional function of the hydraulic retarder rotor, and the hydrodynamic transmission housing can function as the stator.","PeriodicalId":276362,"journal":{"name":"Mechanics of Machines, Mechanisms and Materials","volume":"32 13","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140276971","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"PROSPECTS OF DESIGN AND APPLICATION OF MECHATRONIC MACHINE TOOL EQUIPMENT IN HYBRID MANUFACTURING","authors":"B. Bazrov, Vladimir V. Serebrenny, M. Kheifetz, Vladimir A. Turovets","doi":"10.46864/1995-0470-2024-1-66-50-57","DOIUrl":"https://doi.org/10.46864/1995-0470-2024-1-66-50-57","url":null,"abstract":"World trends and prospects of development of technological equipment complexes are considered. The applied stages and phases of machining equipment design are analyzed by means of constructing design schemes traditional for machine mechanics. It is proposed to create technological machine tool complexes by layout synthesis with the help of element base, which should contain functional technological and service modules, and the service purpose of the machine tool should include the nomenclature of manufactured surface modules. It is shown that the prospects of application of energy flows for intensification of machining processes should be analyzed at the early stages of design, using thermal and electrophysical criteria to study the emerging relations in the system. It is suggested to start designing mechatronic systems of machine tool complexes from the analysis of structural relations of information technologies in hybrid production including traditional and additive technologies.","PeriodicalId":276362,"journal":{"name":"Mechanics of Machines, Mechanisms and Materials","volume":"133 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140280864","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ANALYSIS OF THE EFFECT OF PRELIMINARY AND CYCLIC PLASTIC DEFORMATION ON THE CHEMICAL-THERMAL TREATMENT OF STRUCTURAL STEELS","authors":"Valerij M. Konstantinov, Vladislav A. Leshok, Oleg P. Shtempel","doi":"10.46864/1995-0470-2024-1-66-37-42","DOIUrl":"https://doi.org/10.46864/1995-0470-2024-1-66-37-42","url":null,"abstract":"The subject of the study was thermodiffusion nitrided and silicified layers on steels obtained after plastic deformation. The influence of preliminary plastic deformation on the low-temperature nitriding process and cyclic plastic deformation on the high-temperature silicification process is studied. The results obtained are of interest for accelerating the production processes of chemical-thermal treatment of steels. It is established that preliminary surface plastic deformation contributes to the intensification of the process of ion-plasma nitriding of structural steel. The presence of high-temperature cyclic plastic deformation ensures the intensification of diffusion processes during the resorption of the diffusion silicified layer on structural steel.","PeriodicalId":276362,"journal":{"name":"Mechanics of Machines, Mechanisms and Materials","volume":"145 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140271000","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"STRUCTURE AND PROPERTIES OF POWDER MATERIALS BASED ON MECHANOSYNTHESIZED METAL MATRIX COMPOSITES Ni-TiC","authors":"S. Kovaliova, V. Zhornik, P. Vityaz, T. F. Grigoreva, D. Dudina, A. Ukhina, T. Vidyuk, S. Vosmerikov, E. Devyatkina, N. Lyakhov","doi":"10.46864/1995-0470-2024-1-66-71-79","DOIUrl":"https://doi.org/10.46864/1995-0470-2024-1-66-71-79","url":null,"abstract":"The article considers the mechanochemical preparation of TiC-Ni composites in reaction mixtures of Ti-C-Ni powders and the formation of the structure of materials during their sintering under pressure. The synthesis was carried out in an AGO-2 planetary ball mill with a mixture processing time of 12 and 20 min; their subsequent sintering was performed at a temperature of 950 °C and a pressure of 130 MPa. The results of diffraction studies are presented for structural-phase transformations in mixtures of equimolar composition of titanium and carbon depending on the nickel content in the range of 50–70 wt.%. It is established that an increase in the Ni concentration leads to a decrease in the size of the formed TiCx crystallites from 29 ± 1 to 16 ± 1 nm. A high carbon content TiC0.88–0.98 carbide is formed in Ti-C-(50 and 60 %)Ni compositions and non-stoichiometric TiC0.62–0.78 at 70 % Ni. The microstructure of dispersion-strengthened grains of the nickel solid solution is formed during sintering of TiC/(50–60 %)Ni mechanocomposites. Titanium carbide inclusions have a spherical shape and a diameter of 60–100 nm. When sintering TiC/70%Ni, depleted titanium carbide has a grain boundary distribution with the formation of large (~400 nm) agglomerates. The microhardness of sintered materials is in the range of 850–900 HV.","PeriodicalId":276362,"journal":{"name":"Mechanics of Machines, Mechanisms and Materials","volume":"37 29","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140276310","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"ON THE USE OF THE METHOD OF MULTISTAGE LOADING FOR COMPUTATIONAL AND EXPERIMENTAL EVALUATION OF THE CONTACT ENDURANCE LIMIT","authors":"A. Bogdanovich, Vladimir L. Basiniuk, Anna A. Glazunova","doi":"10.46864/1995-0470-2024-1-66-29-36","DOIUrl":"https://doi.org/10.46864/1995-0470-2024-1-66-29-36","url":null,"abstract":"The possibility of applying the method of multistage loading (Lokati) is considered for the calculation and experimental evaluation of the contact endurance limit. The results of applying the Lokati method to determine the median contact endurance limit of specimens made of aluminum alloy Д16 (D16) and 0.45% carbon steel are analyzed. The tests were carried out according to the scheme “shaft — roller” in rolling conditions without slipping. The criteria for reaching the limit state, the parameters of the multistage loading mode were varied. It is shown that the Lokati method and its basis, the hypothesis of linear accumulation of fatigue damage, make it possible to satisfactorily assess the value of the contact endurance limit of the studied materials.","PeriodicalId":276362,"journal":{"name":"Mechanics of Machines, Mechanisms and Materials","volume":"24 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140277699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"EXPERIMENTAL EVALUATION OF WEAR RESISTANCE OF POLYMER MATERIALS USED IN PISTON COMPRESSOR EQUIPMENT","authors":"Aleksey S. Brundukov, Yaroslava A. Kavaliova","doi":"10.46864/1995-0470-2024-1-66-65-70","DOIUrl":"https://doi.org/10.46864/1995-0470-2024-1-66-65-70","url":null,"abstract":"A new method is proposed for assessing the wear resistance of polymer materials according to the “finger — disk” friction scheme. It involves changing the geometry of the friction zone of polymer samples — the “finger” sphere is replaced by a truncated cone. The developed method is tested on samples of polyetheretherketone (PEEK) and polymer composite materials (PCM) based on polytetrafluoroethylene (PTFE, fluoroplast-4), in particular, obtained after laser ablation with the addition of carbon fibers. The relevance lies in simplifying the manufacture of samples, as well as the possibility of quickly changing the geometric parameters of their working part, which expands the scope of the method with respect to the latest polymer materials and composites based on them. The practical significance of the results is confirmed by their use at such enterprises as JSC “Grodno Azot” and JSC “Grodno Mechanical Plant”, which serially produce tribotechnical PCM.","PeriodicalId":276362,"journal":{"name":"Mechanics of Machines, Mechanisms and Materials","volume":"516 ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140282833","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DEVELOPMENT OF SINTERED FRICTION MATERIAL FOR THE HYDROMECHANICAL TRANSMISSION TORQUE CONVERTER OF BELAZ DUMP TRUCKS","authors":"Alexander Ph. Ilyushchanka, A. V. Liashok, A.N. Rogovoy, V. V. Reginya","doi":"10.46864/1995-0470-2024-1-66-58-64","DOIUrl":"https://doi.org/10.46864/1995-0470-2024-1-66-58-64","url":null,"abstract":"The torque converter is designed to transmit mechanical energy from the engine through a circulating fluid flow and automatically steplessly changes, within certain limits, the angular speed and transmitted torque depending on the load on the dump truck wheels. The torque converter makes it possible to achieve low speeds of the dump truck with increased traction on the drive wheels, ensures stable engine operation when the load changes, and also helps reduce dynamic loads in the dump truck transmission. The paper presents the results of a study of the effect of iron-chromium alloy powder ПХ30 (PKh30) on increasing the performance properties of sintered friction material for use in the torque converter locking clutch of a hydromechanical transmission. This is achieved due to the high physical and mechanical properties of PKh30, and the Cr23C6 layer formed during the sintering process with a thickness of up to 6 μm. It is established that the introduction of 10–40 vol.% of PKh30 powder helps to increase the friction coefficient from 0.042 to 0.075, with the maximum content being 28 %. Based on the data obtained, the composition of the composite friction material ФМ-15 (FM-15) was developed and patented. The manufactured friction discs, installed and operated in the hydromechanical transmission torque converter of the BELAZ-7555E mining dump truck with a load capacity of 60 tons, showed high performance properties. The developed composition of the friction material is also used in the friction clutches of the loading and hauling machine MoAZ-40751 with a load capacity of 16 tons and the loading and transport mine machine MoAZ-75851 with a load capacity of 50 tons with an electronic-hydraulic automatic control system. The study of tribological properties was carried out on a friction machine ИМ 58 (IM 58). The morphology of the friction surface was studied on a scanning electron microscope MIRA (Czech Republic) with an INCA 350 micro-X-ray spectral attachment from Oxford Instruments (United Kingdom). Phase composition was determined on an Ultima IV X-ray diffractometer of Rigaku Company (Japan) in CuKα radiation at an X-ray tube voltage of 40 kV, anode current of 40 mA.","PeriodicalId":276362,"journal":{"name":"Mechanics of Machines, Mechanisms and Materials","volume":"21 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140269346","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}