Transport engineering最新文献

{"title":"IMPROVING THE EFFICIENCY OF REPAIR OF ROLLING STOCK WHEEL PAIRS","authors":"D. Evseev, Yu. F. Kulikov, A. Popov, M. Yagodkin","doi":"10.30987/2782-5957-2022-11-24-31","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-11-24-31","url":null,"abstract":"The possibility of using face milling to restore the tread surface of railway wheel pairs is studied. On the basis of simulation modeling, a conclusion is made about the prospects of using this method for repair. The study objective is to improve the efficiency of repair of rolling stock wheel pairs. The task to which the paper is devoted is the expediency of using face milling when repairing wheel pairs. Research method is modeling. The novelty of the work: defining the possibility of using face milling for the repair of wheel pairs. Study results: the expediency and efficiency of face milling for the repair of rolling stock wheel pairs are found. Conclusions: the use of a new face milling method (turn milling) helps to reduce the complexity of the operation, as well as to increase the resource of wheel pairs in operation due to machining with a minimum allowance.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133897336","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":"PECULIARITIES OF TURNING MACHINING WITH STATICALLY COMPACTED ABRASIVE MEDIA","authors":"V. Scriabin, Nikita Aniskin","doi":"10.30987/2782-5957-2022-11-52-63","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-11-52-63","url":null,"abstract":"The study objective is to find out an analytical dependence that correlates the operating parameters and the conditions of the finishing abrasive treatment with the roughness of the working surfaces of the parts, taking into account the shape factor of the manufactured parts. \u0000The tasks to which the paper is devoted include theoretical and experimental studies of the effect of the treated surface roughness on the technological modes and conditions of surface treatment of complex-profile parts in the medium of statically compacted loose abrasive, as well as in the development of a methodology for determining rational modes and conditions taking into account the shape factor of the machined parts and determining the achievable range of surface roughness. \u0000Research methods: theoretical studies are conducted on the basis of the main provisions of mechanical engineering technology, grinding theory, theoretical mechanics, theory of elasticity and plasticity. Experimental studies are carried out according to standard methods in production and laboratory conditions using certified instrumentation. The data obtained are processed using computer technology and presented in the form of empirical dependencies, convenient for practical use. \u0000The novelty of the work is in finding mathematical dependencies for calculating the pressure of a statically compacted abrasive layer on the surface of the parts being machined, taking into account the shape factor. \u0000Conclusions: Based on the calculated theoretical dependencies and experimental studies, it is shown that the work of micro-cutting with the microrelief of abrasive grains is approximately 1.5...2 times higher than the work of micro-cutting with the tops of abrasive grains of the grinding wheel. This allows to conclude that the machining of parts with a statically compacted loose abrasive, compared with grinding with a conventional grinding wheel, is a less energy-consuming process of removing material from the surfaces of the machined parts. \u0000The paper presents peculiarities of finishing parts with statically compacted abrasive media. The ratio of friction work and micro-cutting of the machining is shown. The nature of the contact interaction of abrasive grains with the treated surface is considered for the first time, taking into account the shape factor, and the rational range of final roughness is defined. \u0000The role of cutting elements of particles affecting the quality and productivity of machining is determined.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122151959","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":"PROFILING OF RAILWAY RAILS ON RAIL MILLING MACHINES","authors":"V. Inozemtsev, A. Popov, A. Kul'kov, A. Korytov","doi":"10.30987/2782-5957-2022-11-39-51","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-11-39-51","url":null,"abstract":"The study objective is to increase the productivity of restoring rail profiles. The paper is devoted to the solution of the problem to determine thermal force, vibro-acoustic and energy parameters of milling machining of rail steel in various conditions. The computational and analytical method of research, express diagnostics are used. The novelty is in the proposed improved technology of rail reprofiling. The following results are obtained: it is found that the most productive and effective method of rail reprofiling in stationary conditions is milling on special rail milling machines; the main directions of increasing the machinability of rail steel are determined, which allows the development of induction heating technology for softening the surface defective metal layer of the rail head. Conclusion: the range of rational cutting modes of rail steel with thermal annealing are found.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"82 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128996883","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":"INCREASING THE WEAR RESISTANCE OF RADIAL BEARINGS WITH NON-CIRCULAR PROFILE AND COMPOSITE FLUOROPLASTIC POLYMER COATING","authors":"V. Kirishchieva, M. Mukutadze","doi":"10.30987/2782-5957-2022-11-10-17","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-11-10-17","url":null,"abstract":"The study objective is to find out the regularities of a stable hydrodynamic regime. \u0000The paper is devoted to the analysis of a model of a radial sliding bearing with a profile adapted to friction conditions, which also has a polymer coating with a groove on the support. \u0000Research methods: there are proposed new models describing the movement of the lubricant in the approximation of a \"thin layer\", the continuity equation taking into account the dependence of viscosity on pressure. \u0000The novelty of the work is in the development of a methodology for engineering calculations of the bearing structure with a polymer coating, a groove and an adapted profile. \u0000As a result of the study, a significant expansion of the possibilities is achieved to apply in practice the calculation models of a radial sliding bearing with a polymer coating and operating in a hydrodynamic lubrication mode. \u0000Conclusions: the design of a radial bearing with a polymer coating and a groove 3 mm wide, as well as adapted to the loading conditions of the support surface with a profile provide a stable shaft lift-up on a hydrodynamic wedge.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116255952","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":"CHOICE OF COOLING METHOD FOR ABRASIVE MACHINING OF PARTS MADE OF POLYMER AND COMPOSITE MATERIALS","authors":"D. Evseev, M. Kulikov, E. Shevchuk, Maksim Deryabin","doi":"10.30987/2782-5957-2022-11-4-9","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-11-4-9","url":null,"abstract":"The study objective is the problem of choosing a cooling method for abrasive machining of parts made of polymer and composite materials (PCM). The paper is devoted to the choice of effective use of lubricating coolants in spraying air-and-water mixture. The study is aimed at evaluating the effectiveness of the coolant supply method using the internal channels of the instrument. As a result of the study, the efficiency of the new cooling method is determined. Conclusions: the use of a new cooling method contributes to the rational distribution and movement of air-and-water mixture flows in a soft abrasive brush. The proposed cooling method makes it possible to supply the air-and-water mixture more precisely, eliminating the effect of moisture absorption by the polymer. The obtained spectrum of temperature distribution while modeling the flow of the air-and-water mixture shows that the efficiency of cooling the cutting zone when using internal channels is not inferior to the methods previously presented in the scientific literature, but at the same time has a number of technological advantages.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114567509","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":"MECHANICAL ROTATION STABILIZER","authors":"V. Pavlov","doi":"10.30987/2782-5957-2022-11-32-38","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-11-32-38","url":null,"abstract":"The study objective is to find a mechanical analogue of cyclotron motion and to determine the structure of the corresponding device, which is appropriately called a stabilized rotator. The topic of speed stabilization is relevant. With cyclotron motion, the Lagrangian of an electron is twice as large as its kinetic energy. In terms of macromechanics, this corresponds to the equality of kinetic and potential energies. This condition is key to the possibility of generalizing cyclotron motion to mechanics. It follows from this that the composition of a stabilized rotator should include elements that are able to store both of these energy types. Such elements are the load and the spring. The natural rotation frequency of the stabilized rotator is strictly fixed (it does not depend on either the moment of inertia or the angular momentum) and remarkably coincides with the natural frequency of the pendulum with identical parameters. When the angular momentum changes, the radius and tangential velocity change (the rotation frequency does not change and is equal to its own). At zero torque moment in stationary mode, the rotation frequency of the stabilized rotator cannot be arbitrary and takes a single value. Just as when the pendulum is forced to swing, the frequency does not coincide with its own frequency, the rotation frequency of the stabilized rotator does not coincide with its own rotation frequency when loaded. A stabilized rotor can be used to control the natural oscillation frequency of a radial oscillator, although in this case it may have strong competition with mechatronic systems. On the contrary, as a rotation stabilizer, its competitive capabilities are undeniable and determined by the extremely simple design.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"135 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-11-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133292350","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":"CREATING A GROOVING AND CUTTING TOOL WITH COOLING CHANNELS MADE USING ADDITIVE TECHNOLOGIES","authors":"S. Kugaevskiy, Evgeniy Pizhenkov, Vladimir Podgorbunskih","doi":"10.30987/2782-5957-2022-10-4-11","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-10-4-11","url":null,"abstract":"The study objective is to develop the design and technology of manufacturing grooving and cutting tools with internal channels for supplying coolants under high pressure. The design assumes the use of conventional replaceable cutting carbide plates (CCP) offered by many manufacturers. Due to the fact that drilling of narrow channels in the cutter is very problematic, it is proposed to manufacture the front part of the cutter, which secures the replaceable cutting carbide plate, in an additive way. The back of the cutter (holder) can be made by traditional methods. At the same time, the options for fixing the replaceable cutting carbide plates (CCP) are analysed, as well as basing it in the holder and the method of coolant supply. The variants of the design of grooving and cutting tools according to the criterion of treatment features are considered. Special attention is paid to the design of cutters for the surface treatment of narrow deep grooves. The novelty of the work is in carrying out research related to the development of a new design of cutting tools with channels for coolant supply and the method of its manufacture. The research method is 3D modeling of the tool and computer analysis of the stress state on the support surface of the tool head. The development of designs of grooving and cutting tools with cooling channels made with the help of additive technologies is currently not described in the scientific literature. Study result: 3D models, drawings of tools for cutting radial and axial grooves and tools for cutting the edges are obtained. Studies of the stressed state of the support surfaces for CCP are carried out. Prototypes of the corresponding three types of cutters are made. Conclusions: the conducted research proves the prospects of using the method. Thanks to the use of the developed tool, it is possible to increase the productivity of machining parts made of hard-to-machine material, including titanium alloys and heat-resistant steels. As a result, the task of creating a domestic cutting tool that surpasses imported analogues in its properties can be solved.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"20 2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116777044","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":"HYBRIDIZATION OF LASER WELDING","authors":"A. Magdin, Rustem Dyusegaliev, Alexey Pripadchev, A. Gorbunov","doi":"10.30987/2782-5957-2022-10-12-18","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-10-12-18","url":null,"abstract":"The paper objective is to study a hybrid welding process based on the combination of two methods: laser and plasma ones. The combination of two different types of welding is a promising way to detect and then eliminate the defects of each of them. The task to which the paper is devoted is aimed at finding out features when combining different approaches to the creation of fixed welded joints. The paper analyzes hybridization of laser and plasma piles in a concise way, provides generalized information about their main advantages and disadvantages. The distinctive novelty of this work is concise and cumulative analysis of the problem involved which has not been done before. The result of the study is the publication of the hybrid welding feature, explaining the principles of the working process of the devices. On the basis of the conducted research, the following conclusions can be drawn: hybridization of laser and plasma welding compensate for the disadvantages and increase the advantages of each other; during the study, the main pros and cons are summarized, important aspects of each of the affected methods for obtaining fixed welded joints are analyzed.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132432165","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":"RESTORATION TECHNOLOGY OF AXIS NECK OF LOCOMOTIVE DRIVING WHEEL","authors":"M. Shalygin, A. Vashchishina","doi":"10.30987/2782-5957-2022-10-36-41","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-10-36-41","url":null,"abstract":"The study objective is to examine new methods of restoring the axis neck of the locomotive driving wheel. To achieve the goal, the task was set and solved to reduce hydrogen concentration in the axis during its manufacture and repair by means of appropriate technology. To fulfill this task, the following research methods are carried out, that is vacuum thermal exposure, wear determination, diffuse siliconization, definition of hydrogen concentration. The scientific novelty of the work is in the fact that the proposed technology consists in restoring the axis of a locomotive wheelset, contributing to an increase in the axis durability by means of preliminary diffusion siliconization. Conclusions: the proposed technology of restoration and repair does not change the critical static properties of the axis, while increasing the wear resistance of the shaft neck and reducing the release of diffusion-active hydrogen.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114372348","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":"IMPROVEMENT OF BORING TOOL DESIGN","authors":"A. Zholobov, Olga Klyaus","doi":"10.30987/2782-5957-2022-10-19-27","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-10-19-27","url":null,"abstract":"The theoretical research objectiveis to create prerequisites for the development of new designs of boring tools. The task to which the paper is devoted: identification of constructive varieties of boring tools; improvement of the geometric shape of the conical part of the tool. Research methods: modeling of elastic deformations of various designs of boring tools. The novelty of the work: a design with a transitional section from the prismatic to the conical part in the form of a cone and a conical part in a barrel-like design is proposed for introduction into metalworking. Research results: optimal geometric shapes and parameters of the boring tool are identified. Conclusions: the paper analyzes the obtained data of theoretical studies and identifies structural changes in the standard boring tools widely used in metalworking.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114340755","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}