Pub Date : 2023-01-13DOI: 10.30987/2782-5957-2023-1-4-13
A. Fedukov
The study objective is to analyze the values of contact approach in the flat joints of special equipment, using unified modules obtained from the experiment and existing dependencies. The task is to compare the values of contact approaches obtained as a result of calculations based on existing dependencies with the results of experiments. Research methods: experimental studies and already existing computational methods of research to determine the values of contact approach. The novelty of the work: refined dependencies are obtained, as well as the values of coefficients of already existing dependencies for calculating the values of contact approaches of extended parts of unified modules during their assembly. Research results: the obtained results of calculations and experiments are analyzed. The values of the coefficients for the existing methods of calculating contact approach are refined, and experimental dependences are obtained. Conclusions: studies have shown that for extended contact sections, the use of calculated dependencies in some conditions gives an error that cannot be neglected. When designing high-precision equipment, such calculations require accurate definition.
{"title":"ANALYSIS OF CONTACT APPROACH IN FLAT JOINTS OF SPECIAL EQUIPMENT WHEN USING UNIFIED MODULES","authors":"A. Fedukov","doi":"10.30987/2782-5957-2023-1-4-13","DOIUrl":"https://doi.org/10.30987/2782-5957-2023-1-4-13","url":null,"abstract":"The study objective is to analyze the values of contact approach in the flat joints of special equipment, using unified modules obtained from the experiment and existing dependencies. The task is to compare the values of contact approaches obtained as a result of calculations based on existing dependencies with the results of experiments. Research methods: experimental studies and already existing computational methods of research to determine the values of contact approach. The novelty of the work: refined dependencies are obtained, as well as the values of coefficients of already existing dependencies for calculating the values of contact approaches of extended parts of unified modules during their assembly. Research results: the obtained results of calculations and experiments are analyzed. The values of the coefficients for the existing methods of calculating contact approach are refined, and experimental dependences are obtained. Conclusions: studies have shown that for extended contact sections, the use of calculated dependencies in some conditions gives an error that cannot be neglected. When designing high-precision equipment, such calculations require accurate definition.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121787246","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}
Pub Date : 2023-01-13DOI: 10.30987/2782-5957-2023-1-46-53
Evgeniy Nosov, Denis D'yakov, M. Glotov, M. Tsyganov
The study objective is to develop a mathematic method to substantiate the feasibility of performing the running repair of automotive engineering at transport enterprises. The task is troubleshooting service of automotive e engineering in the conditions of a transport enterprise based on the method of rational planning of work package. Research methods are mathematic modeling of network planning in the study of operations. The novelty of the work is the use of the developed objective function for assessing the scope of work and its feasibility on the basis of network planning of repair work at transport enterprises. The results of the study: a graph of performing the work with the justification of labor costs is constructed, cost calculations are completed, decisions are made on the allocation of resources (labor, financial).
{"title":"APPLICATION OF NETWORK PLANNING METHOD FOR RUNNING REPAIR OF AUTOMOTIVE ENGINEERING AT TRANSPORT ENTERPRISES","authors":"Evgeniy Nosov, Denis D'yakov, M. Glotov, M. Tsyganov","doi":"10.30987/2782-5957-2023-1-46-53","DOIUrl":"https://doi.org/10.30987/2782-5957-2023-1-46-53","url":null,"abstract":"The study objective is to develop a mathematic method to substantiate the feasibility of performing the running repair of automotive engineering at transport enterprises. The task is troubleshooting service of automotive e engineering in the conditions of a transport enterprise based on the method of rational planning of work package. Research methods are mathematic modeling of network planning in the study of operations. The novelty of the work is the use of the developed objective function for assessing the scope of work and its feasibility on the basis of network planning of repair work at transport enterprises. The results of the study: a graph of performing the work with the justification of labor costs is constructed, cost calculations are completed, decisions are made on the allocation of resources (labor, financial).","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133652364","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}
Pub Date : 2023-01-13DOI: 10.30987/2782-5957-2023-1-54-62
E. Rozhkova
The paper objective is to estimate the damage to the automatic coupling device of freight cars in operation. A statistical analysis of auto-coupling breaks on roads and a statistical estimation of nondestructive testing of auto-coupling device parts are carried out. During the analysis, it is found that 68% of breaks occur due to the presence of cracks in the body of the automatic coupler, 60% of breaks of the automatic couplers occur in areas where the track has a slope, including the mountain pass areas and 77% of breaks occur in the train traction mode. The scientific novelty is in obtaining a logarithmically normal law of the crack length distribution in the coupling body and traction clamp during the operation of the car in the overhaul period. The most likely crack formation in the body of the automatic coupling during the operation of the car between scheduled repairs is 41 mm long, in the traction clamp it is 63 mm. The practical significance of the work is in the fact that the obtained results can be used in making recommendations and organization of technical measures to reduce the cases of auto-coupling breaks and increase the quality of repair and maintenance of the auto-coupling device.
{"title":"ESTIMATION OF DAMAGE TO THE AUTOMATIC COUPLING DEVICE OF FREIGHT CARS IN OPERATION","authors":"E. Rozhkova","doi":"10.30987/2782-5957-2023-1-54-62","DOIUrl":"https://doi.org/10.30987/2782-5957-2023-1-54-62","url":null,"abstract":"The paper objective is to estimate the damage to the automatic coupling device of freight cars in operation. A statistical analysis of auto-coupling breaks on roads and a statistical estimation of nondestructive testing of auto-coupling device parts are carried out. During the analysis, it is found that 68% of breaks occur due to the presence of cracks in the body of the automatic coupler, 60% of breaks of the automatic couplers occur in areas where the track has a slope, including the mountain pass areas and 77% of breaks occur in the train traction mode. The scientific novelty is in obtaining a logarithmically normal law of the crack length distribution in the coupling body and traction clamp during the operation of the car in the overhaul period. The most likely crack formation in the body of the automatic coupling during the operation of the car between scheduled repairs is 41 mm long, in the traction clamp it is 63 mm. The practical significance of the work is in the fact that the obtained results can be used in making recommendations and organization of technical measures to reduce the cases of auto-coupling breaks and increase the quality of repair and maintenance of the auto-coupling device.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129985101","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}
Pub Date : 2022-12-09DOI: 10.30987/2782-5957-2022-12-13-17
Igor A. Popov
In a monoreactive harmonic oscillator, inert elements can make free sinusoidal oscillations, which are accompanied by the transformation of one inert element kinetic energy into the kinetic energy of another inert element. In this condition the energy of the first inert element is zero. At the same time, the energy of the second element has the maximum value. At the next moment of time, the first element acquires acceleration due to the kinetic energy of the second element, the speed of which begins to decrease. In a classical oscillator, free sinusoidal oscillations are accompanied by an exchange of energy between its elements having the opposite reactivity character. In a spring pendulum, the potential energy of an elastic element is transformed into the kinetic energy of an inert element and vice versa. These elements have the opposite character of reactivity. In an electric oscillatory circuit, the energy of the coil magnetic field is transformed into the energy of the condenser electric field and vice versa. These elements also have the opposite character of reactivity. There are also oscillators in which free sinusoidal oscillations are accompanied by the transformation of the kinetic energy of an inert element or the potential energy of an elastic element into the energy of the coil magnetic field or the energy of the capacitor electric field and vice versa. Free sinusoidal oscillations can occur during the mutual transformation of any physical types of energy.This circumstance is the motive to make an oscillator, in which free sinusoidal oscillations are accompanied by the transformation of the kinetic energy of an inert element into the kinetic energy of another inert element. There are no elements with a different reactivity character in such an oscillator. This type of an oscillator is essentially monoreactive.
{"title":"MECHANICAL OSCILLATOR WITHOUT POTENTIAL ENERGY STORAGE","authors":"Igor A. Popov","doi":"10.30987/2782-5957-2022-12-13-17","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-12-13-17","url":null,"abstract":"In a monoreactive harmonic oscillator, inert elements can make free sinusoidal oscillations, which are accompanied by the transformation of one inert element kinetic energy into the kinetic energy of another inert element. In this condition the energy of the first inert element is zero. At the same time, the energy of the second element has the maximum value. At the next moment of time, the first element acquires acceleration due to the kinetic energy of the second element, the speed of which begins to decrease. In a classical oscillator, free sinusoidal oscillations are accompanied by an exchange of energy between its elements having the opposite reactivity character. In a spring pendulum, the potential energy of an elastic element is transformed into the kinetic energy of an inert element and vice versa. These elements have the opposite character of reactivity. In an electric oscillatory circuit, the energy of the coil magnetic field is transformed into the energy of the condenser electric field and vice versa. These elements also have the opposite character of reactivity. There are also oscillators in which free sinusoidal oscillations are accompanied by the transformation of the kinetic energy of an inert element or the potential energy of an elastic element into the energy of the coil magnetic field or the energy of the capacitor electric field and vice versa. Free sinusoidal oscillations can occur during the mutual transformation of any physical types of energy.This circumstance is the motive to make an oscillator, in which free sinusoidal oscillations are accompanied by the transformation of the kinetic energy of an inert element into the kinetic energy of another inert element. There are no elements with a different reactivity character in such an oscillator. This type of an oscillator is essentially monoreactive.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124701640","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}
Pub Date : 2022-12-09DOI: 10.30987/2782-5957-2022-12-48-55
Denis V. Gusev, M. Larionov
The possibility of using glass- and carbon-filled thermoplastics for manufacturing body parts of electronic equipment by means of additive generation of geometry is studied. The study objective is to find a method for manufacturing complex profile surfaces, to reduce the labor intensity of manufacturing body parts of electronic equipment, to improve the efficiency of repair of rolling stock wheel sets. The task to which the paper is devoted is the expediency of using carbon- and glass-filled thermoplastics for manufacturing body parts. The main method of research is experiment. The novelty of the work is that the possibility of using carbon- and glass-filled thermoplastics for manufacturing body parts is found and studied. Research results: the expediency and efficiency of using glass- and carbon-filled thermoplastics for manufacturing body parts of electronic equipment by means of additive generation of geometry is found empirically. Conclusion: the use of additive generation of geometry contributes to reducing the complexity of manufacturing body parts of electronic equipment. The possibility of using glass- and carbon-filled thermoplastics in the production of parts for transport systems is proved.
{"title":"STUDY OF THE POSSIBILITY TO USE CARBON- AND GLASS-FILLED THERMOPLASTICS FOR MANUFACTURING BODY PARTS OF ELECTRONIC EQUIPMENT FOR TRANSPORT SYSTEMS","authors":"Denis V. Gusev, M. Larionov","doi":"10.30987/2782-5957-2022-12-48-55","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-12-48-55","url":null,"abstract":"The possibility of using glass- and carbon-filled thermoplastics for manufacturing body parts of electronic equipment by means of additive generation of geometry is studied. The study objective is to find a method for manufacturing complex profile surfaces, to reduce the labor intensity of manufacturing body parts of electronic equipment, to improve the efficiency of repair of rolling stock wheel sets. The task to which the paper is devoted is the expediency of using carbon- and glass-filled thermoplastics for manufacturing body parts. The main method of research is experiment. The novelty of the work is that the possibility of using carbon- and glass-filled thermoplastics for manufacturing body parts is found and studied. Research results: the expediency and efficiency of using glass- and carbon-filled thermoplastics for manufacturing body parts of electronic equipment by means of additive generation of geometry is found empirically. Conclusion: the use of additive generation of geometry contributes to reducing the complexity of manufacturing body parts of electronic equipment. The possibility of using glass- and carbon-filled thermoplastics in the production of parts for transport systems is proved.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"4 7-8","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120932294","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}
Pub Date : 2022-12-09DOI: 10.30987/2782-5957-2022-12-4-12
M. Rabyko, V. Shemenkov
The study objective is to develop a technique for hardening die steels with a glow discharge in a cathode magnetic field. The task to which the paper is devoted is to find out how the treatment by glow discharge in a cathode magnetic field affects microhardness and wear resistance. Research methods are pilot industrial tests. The novelty of the work: the mathematical dependence of the change in microhardness and wear resistance of the main die steels on the technological parameters of the treatment by glow discharge in a cathode magnetic field is obtained. Research results: recommendations for the industrial application of technology. Conclusions: the results of industrial tests confirm that there is an effect of increasing the production life of die tooling modified by the complex effect of a glow discharge in a constant magnetic field in average by 1.5 - 4 times. The total economic effect of using the technology reaches $ 2,300.
{"title":"IMPROVEMENT OF OPERATIONAL CHARACTERISTICS OF DIE STEELS BY GLOW DISCHARGE USING A CATHODE MAGNETIC FIELD","authors":"M. Rabyko, V. Shemenkov","doi":"10.30987/2782-5957-2022-12-4-12","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-12-4-12","url":null,"abstract":"The study objective is to develop a technique for hardening die steels with a glow discharge in a cathode magnetic field. The task to which the paper is devoted is to find out how the treatment by glow discharge in a cathode magnetic field affects microhardness and wear resistance. \u0000Research methods are pilot industrial tests. \u0000The novelty of the work: the mathematical dependence of the change in microhardness and wear resistance of the main die steels on the technological parameters of the treatment by glow discharge in a cathode magnetic field is obtained. Research results: recommendations for the industrial application of technology. Conclusions: the results of industrial tests confirm that there is an effect of increasing the production life of die tooling modified by the complex effect of a glow discharge in a constant magnetic field in average by 1.5 - 4 times. The total economic effect of using the technology reaches $ 2,300.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114733522","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}
Pub Date : 2022-12-09DOI: 10.30987/2782-5957-2022-12-18-25
Stepan Mihaylenko, A. Kisel’
The rational choice of cooling mixtures (coolant) is a complex technological task. Currently, world industries produce a wide range of such substances. At the same time, manufacturers' recommendations on their use are of a general nature, which makes it difficult to choose them for specific cases. One of the criteria for choosing a coolant is the roughness of the formed surface, especially during constrained cutting, in particular during drilling. Therefore, studies of the influence of cooling mixture on the roughness of the hole surface during drilling are relevant. The task to which the paper is devoted is to find out the dependence of the roughness of the hole surface obtained when drilling workpieces of low-alloy steel on the properties of the coolant used. To achieve this aim, experimental studies were conducted. As a result of laboratory tests of coolants, their lubricating properties and density were determined. The evaluation of the obtained roughness dependencies during drilling on the properties of coolant allowed us to define a formula for determining the predicted surface quality. It is found out that the determinant property of the coolant is its lubricating action, and the parameter for its evaluation is friction factor. The calculation formula makes it possible to predict the roughness of the hole surface when drilling low-alloy steels with an error of 11.8%. The method of coolants testing and determination of their effectiveness by the roughness parameter Raavg is presented.
{"title":"THE INFLUENCE OF COOLING MIXTURES ON THE ROUGHNESS OF HOLES WHEN DRILLING WORKPIECES MADE OF LOW-ALLOY STEELS","authors":"Stepan Mihaylenko, A. Kisel’","doi":"10.30987/2782-5957-2022-12-18-25","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-12-18-25","url":null,"abstract":"The rational choice of cooling mixtures (coolant) is a complex technological task. Currently, world industries produce a wide range of such substances. At the same time, manufacturers' recommendations on their use are of a general nature, which makes it difficult to choose them for specific cases. One of the criteria for choosing a coolant is the roughness of the formed surface, especially during constrained cutting, in particular during drilling. Therefore, studies of the influence of cooling mixture on the roughness of the hole surface during drilling are relevant. The task to which the paper is devoted is to find out the dependence of the roughness of the hole surface obtained when drilling workpieces of low-alloy steel on the properties of the coolant used. To achieve this aim, experimental studies were conducted. As a result of laboratory tests of coolants, their lubricating properties and density were determined. The evaluation of the obtained roughness dependencies during drilling on the properties of coolant allowed us to define a formula for determining the predicted surface quality. It is found out that the determinant property of the coolant is its lubricating action, and the parameter for its evaluation is friction factor. The calculation formula makes it possible to predict the roughness of the hole surface when drilling low-alloy steels with an error of 11.8%. The method of coolants testing and determination of their effectiveness by the roughness parameter Raavg is presented.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"77 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114843162","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}
Pub Date : 2022-12-09DOI: 10.30987/2782-5957-2022-12-26-35
A. Fedukov
The study objective is the design and technological support of the accuracy of linear displacement modules based on unified parts and assemblies of rail guides and ball screws. The task to which the paper is devoted is to refine techniques in the design of linear displacement modules of machining equipment. Research methods: experimental studies and existing computational research methods to determine the value of contact approach. Novelty of the work: a method of designing linear displacement modules based on unified modules is developed, taking into account the values of contact approaches, where the criterion for assessing quality is the power characteristics of the linear displacement module. Research results: a method for designing linear displacement modules based on unified modules is developed. Conclusions: when designing linear modules for displacing technological equipment, including the value of contact approach in the calculations is usually relevant for high-precision linear modules.
{"title":"METHOD TO DESIGN LINEAR DISPLACEMENT MODULES BASED ON UNIFIED MODULES","authors":"A. Fedukov","doi":"10.30987/2782-5957-2022-12-26-35","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-12-26-35","url":null,"abstract":"The study objective is the design and technological support of the accuracy of linear displacement modules based on unified parts and assemblies of rail guides and ball screws. \u0000The task to which the paper is devoted is to refine techniques in the design of linear displacement modules of machining equipment. \u0000Research methods: experimental studies and existing computational research methods to determine the value of contact approach. \u0000Novelty of the work: a method of designing linear displacement modules based on unified modules is developed, taking into account the values of contact approaches, where the criterion for assessing quality is the power characteristics of the linear displacement module. \u0000Research results: a method for designing linear displacement modules based on unified modules is developed. \u0000Conclusions: when designing linear modules for displacing technological equipment, including the value of contact approach in the calculations is usually relevant for high-precision linear modules.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130013453","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}
Pub Date : 2022-12-09DOI: 10.30987/2782-5957-2022-12-36-47
A. Tolstosheev
The study objective is to analyze the own frequencies and small-amplitude oscillations of a plane manipulator having parallel structure and to determine the influence of elastic and inertial properties of intermediate links and the drive on own frequencies and forms. The paper is devoted to solving the problem of ensuring vibration stability of manipulators. Analytical methods of the theory of oscillations and computational experiments in the software package "Universal Mechanism" are used. The novelty of the work is in defining the dependence of the own frequencies and oscillation forms of a plane parallel manipulator on the ratio of elastic and inertial properties of the links and the drive. As a result of the research, analytical and several computer models of a plane manipulator with three degrees of freedom are developed, own frequencies and oscillation forms for the developed models are determined. Conclusions: the replacement of absolutely rigid intermediate links with elastic rods led to the appearance of own frequencies and own modes corresponding to them , on which the output link oscillates in the vertical plane perpendicular to the plane of the manipulator links movement; the oscillations of the output link in the vertical and horizontal planes on their own forms are separated; the values of own frequencies at which the output link oscillates in the vertical plane do not depend on the coefficient of rigidity of the drive, but are determined by the elastic and inertial properties of the rods; the values of own frequencies at which the output link oscillates in the horizontal plane depend on the ratio of the drive and rods compliance; the influence of the elastic link masses on the values of their own frequencies is determined by the type of their own forms and the ratio of inertial parameters of the output link and rods.
{"title":"ANALYSIS OF OWN FREQUENCIES AND OSCILLATION FORMS OF A PLANE PARALLEL MANIPULATOR","authors":"A. Tolstosheev","doi":"10.30987/2782-5957-2022-12-36-47","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-12-36-47","url":null,"abstract":"The study objective is to analyze the own frequencies and small-amplitude oscillations of a plane manipulator having parallel structure and to determine the influence of elastic and inertial properties of intermediate links and the drive on own frequencies and forms. The paper is devoted to solving the problem of ensuring vibration stability of manipulators. Analytical methods of the theory of oscillations and computational experiments in the software package \"Universal Mechanism\" are used. The novelty of the work is in defining the dependence of the own frequencies and oscillation forms of a plane parallel manipulator on the ratio of elastic and inertial properties of the links and the drive. As a result of the research, analytical and several computer models of a plane manipulator with three degrees of freedom are developed, own frequencies and oscillation forms for the developed models are determined. Conclusions: the replacement of absolutely rigid intermediate links with elastic rods led to the appearance of own frequencies and own modes corresponding to them , on which the output link oscillates in the vertical plane perpendicular to the plane of the manipulator links movement; the oscillations of the output link in the vertical and horizontal planes on their own forms are separated; the values of own frequencies at which the output link oscillates in the vertical plane do not depend on the coefficient of rigidity of the drive, but are determined by the elastic and inertial properties of the rods; the values of own frequencies at which the output link oscillates in the horizontal plane depend on the ratio of the drive and rods compliance; the influence of the elastic link masses on the values of their own frequencies is determined by the type of their own forms and the ratio of inertial parameters of the output link and rods.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132049951","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}
Pub Date : 2022-11-10DOI: 10.30987/2782-5957-2022-11-18-23
A. Kirichek, D. Soloviyov, A. Yashin, S. Silantiev, Anastasia Fonina
Nowadays, industry development requires making new strengthening technologies that allow expanding the rational scope of their application. It is quite promising to use methods of combined hardening that allow changing the physical and mechanical properties of the surface layer during successive external actions having different physical nature: sequential plastic deformation and external thermal effects. Therefore, the objective of the conducted study is to make a complex technology of combined deformation and thermal hardening. Preliminary plastic deformation is proposed to be carried out by the method of wave deformation hardening, in which the improvement of properties is achieved by forming structural imperfections of the crystal lattice of the material under the action of prolonged shock pulses of significant energy and duration. The use of these pulses contributes to a more complete plastic deformation of the hardened metal and the formation of a deeper hardened surface layer than with traditional methods of deformation hardening. The proposed combined technology, consisting in the use of wave deformation hardening before thermal treatment, allows to obtain high hardness and plasticity in the surface layer, provides an additional resource to increase the operational characteristics of the part. The novelty of the work is in the complex development of a method for combined wave deformation and thermal hardening of the surface layer of alloy steels. The conducted studies of the method have shown the high efficiency of the technology of combined deformation wave and thermal hardening for various grades of alloy steels.
{"title":"POSSIBILITIES OF COMBINED METAL HARDENING WITH WAVE DEFORMATION AND SUBSEQUENT HEAT TREATMENT","authors":"A. Kirichek, D. Soloviyov, A. Yashin, S. Silantiev, Anastasia Fonina","doi":"10.30987/2782-5957-2022-11-18-23","DOIUrl":"https://doi.org/10.30987/2782-5957-2022-11-18-23","url":null,"abstract":"Nowadays, industry development requires making new strengthening technologies that allow expanding the rational scope of their application. It is quite promising to use methods of combined hardening that allow changing the physical and mechanical properties of the surface layer during successive external actions having different physical nature: sequential plastic deformation and external thermal effects. Therefore, the objective of the conducted study is to make a complex technology of combined deformation and thermal hardening. Preliminary plastic deformation is proposed to be carried out by the method of wave deformation hardening, in which the improvement of properties is achieved by forming structural imperfections of the crystal lattice of the material under the action of prolonged shock pulses of significant energy and duration. The use of these pulses contributes to a more complete plastic deformation of the hardened metal and the formation of a deeper hardened surface layer than with traditional methods of deformation hardening. The proposed combined technology, consisting in the use of wave deformation hardening before thermal treatment, allows to obtain high hardness and plasticity in the surface layer, provides an additional resource to increase the operational characteristics of the part. The novelty of the work is in the complex development of a method for combined wave deformation and thermal hardening of the surface layer of alloy steels. The conducted studies of the method have shown the high efficiency of the technology of combined deformation wave and thermal hardening for various grades of alloy steels.","PeriodicalId":289189,"journal":{"name":"Transport engineering","volume":"28 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":"126169927","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}
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