Pub Date : 2024-09-16DOI: 10.3103/s1068798x2470134x
A. V. Vikulin, V. A. Zemlyanaya
Abstract
The thermal state of plate–fin heat exchangers with bilateral coolant supply is studied. The heat exchangers considered are rectangular in cross section and trapezoidal in longitudinal section. Coolant is supplied from both sides (models M1 and M2) or from one side only (in model M3). Heat escapes though a hole in the smaller side of the trapezium. The flow and thermal characteristics of the heat exchangers are compared. In bilateral coolant supply, a larger area of the heat exchanger is cooled, while retaining high rates of heat transfer.
{"title":"Influence of Unilateral and Bilateral Coolant Supply on the Thermal Characteristics of a Plate–Fin Heat Exchanger","authors":"A. V. Vikulin, V. A. Zemlyanaya","doi":"10.3103/s1068798x2470134x","DOIUrl":"https://doi.org/10.3103/s1068798x2470134x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The thermal state of plate–fin heat exchangers with bilateral coolant supply is studied. The heat exchangers considered are rectangular in cross section and trapezoidal in longitudinal section. Coolant is supplied from both sides (models M1 and M2) or from one side only (in model M3). Heat escapes though a hole in the smaller side of the trapezium. The flow and thermal characteristics of the heat exchangers are compared. In bilateral coolant supply, a larger area of the heat exchanger is cooled, while retaining high rates of heat transfer.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"11 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250964","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 : 2024-09-16DOI: 10.3103/s1068798x24701326
K. R. Muratov, D. P. Davydov, E. A. Gashev, T. R. Ablyaz
Abstract
A theoretical method is proposed for determining the duration of abrasive finishing of cylindrical external surfaces. The method takes account of the initial geometric deviation, the productivity, and the kinematic parameters. By this means, the machining time may be established, taking account of the operations involved, and the best finishing conditions for precision surfaces may be established, so as to ensure the required surface roughness (Ra no greater than 0.2 µm) and geometric precision (deviation from cylindrical form no more than 0.002 mm).
{"title":"Controlled Shaping of Precision External Cylindrical Surfaces","authors":"K. R. Muratov, D. P. Davydov, E. A. Gashev, T. R. Ablyaz","doi":"10.3103/s1068798x24701326","DOIUrl":"https://doi.org/10.3103/s1068798x24701326","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A theoretical method is proposed for determining the duration of abrasive finishing of cylindrical external surfaces. The method takes account of the initial geometric deviation, the productivity, and the kinematic parameters. By this means, the machining time may be established, taking account of the operations involved, and the best finishing conditions for precision surfaces may be established, so as to ensure the required surface roughness (<i>R</i><sub><i>a</i></sub> no greater than 0.2 µm) and geometric precision (deviation from cylindrical form no more than 0.002 mm).</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"198 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250962","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 : 2024-09-16DOI: 10.3103/s1068798x24701387
V. T. Khairulin, T. R. Ablyaz, E. S. Shlykov, V. B. Blokhin, K. R. Muratov
Abstract
The wire-cut electrical discharge machining of VV751P heat-resistant nickel alloy is considered. An empirical model is formulated to describe the influence of the machining conditions and the workpiece thickness on the cut width. On the basis of the results obtained, the required accuracy may be obtained in machining VV751P alloy components.
{"title":"Factors Affecting the Cut Width in the Wire-Cut Electrical Discharge Machining of VV751P Heat-Resistant Nickel Alloy","authors":"V. T. Khairulin, T. R. Ablyaz, E. S. Shlykov, V. B. Blokhin, K. R. Muratov","doi":"10.3103/s1068798x24701387","DOIUrl":"https://doi.org/10.3103/s1068798x24701387","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The wire-cut electrical discharge machining of VV751P heat-resistant nickel alloy is considered. An empirical model is formulated to describe the influence of the machining conditions and the workpiece thickness on the cut width. On the basis of the results obtained, the required accuracy may be obtained in machining VV751P alloy components.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268503","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 : 2024-09-16DOI: 10.3103/s1068798x24701363
Yu. D. Shchitsyn, D. S. Belinin, S. D. Neulybin, K. P. Karunakaran, T. V. Ol’shanskaya, A. V. Kazantsev, S. G. Nikulina
Abstract
The problem of improving the quality of metal materials during additive manufacturing of workpieces is a relevant one. Additive technologies based on melting the starting material face a number of problems related to controlling the quality of the created material, which are primarily associated with overheating of the material in the working area and non-stationary thermal conditions during formation of the product. The possibility of creating monolithic metal products of significant size and weight with specified material characteristics by the method of layer-by-layer plasma metallization is currently effectively unexplored. The defect rate, chemical composition, structure, and properties of the material formed by plasma metallization are determined by thermochemical and gas-kinetic processes at all stages—from melting and wire spaying to the collision of particles on the substrate and the formation of the monolith. Development of a technology for the formation of a monolithic, defect-free material with a controlled chemical composition, structure, and properties by layer-by-layer plasma metallization would solve the problem of manufacturing large-sized products with a developed surface, ensure high process productivity, and reduce residual internal stresses and plastic deformations during additive manufacturing of special-purpose products. This article presents the results of a study of the possibility of additive manufacturing of workpieces by layer-by-layer plasma metallization from 308 LSi steel. It is shown that control over the structure and properties of the formed material can be achieved. Provided certain conditions for the formation of the two-phase plasma jet are fulfilled, it is possible to ensure that the structure and properties of the resulting material are close to those obtained by traditional methods. Metal created by layer-by-layer plasma metallization has high tensile and creep strengths, but is inferior in terms of ductility.
{"title":"Plasma Metallization for Additive Manufacturing of Workpieces Made of 308 LSi Steel","authors":"Yu. D. Shchitsyn, D. S. Belinin, S. D. Neulybin, K. P. Karunakaran, T. V. Ol’shanskaya, A. V. Kazantsev, S. G. Nikulina","doi":"10.3103/s1068798x24701363","DOIUrl":"https://doi.org/10.3103/s1068798x24701363","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The problem of improving the quality of metal materials during additive manufacturing of workpieces is a relevant one. Additive technologies based on melting the starting material face a number of problems related to controlling the quality of the created material, which are primarily associated with overheating of the material in the working area and non-stationary thermal conditions during formation of the product. The possibility of creating monolithic metal products of significant size and weight with specified material characteristics by the method of layer-by-layer plasma metallization is currently effectively unexplored. The defect rate, chemical composition, structure, and properties of the material formed by plasma metallization are determined by thermochemical and gas-kinetic processes at all stages—from melting and wire spaying to the collision of particles on the substrate and the formation of the monolith. Development of a technology for the formation of a monolithic, defect-free material with a controlled chemical composition, structure, and properties by layer-by-layer plasma metallization would solve the problem of manufacturing large-sized products with a developed surface, ensure high process productivity, and reduce residual internal stresses and plastic deformations during additive manufacturing of special-purpose products. This article presents the results of a study of the possibility of additive manufacturing of workpieces by layer-by-layer plasma metallization from 308 LSi steel. It is shown that control over the structure and properties of the formed material can be achieved. Provided certain conditions for the formation of the two-phase plasma jet are fulfilled, it is possible to ensure that the structure and properties of the resulting material are close to those obtained by traditional methods. Metal created by layer-by-layer plasma metallization has high tensile and creep strengths, but is inferior in terms of ductility.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"191 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250996","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 : 2024-09-16DOI: 10.3103/s1068798x24701521
M. N. Kaloshina, T. Yu. Nikolenko
Abstract
The relevance of this research topic lies in the need to consider various options for building financial models to commercialize the results of innovative R&D with account for the specifics, goals, and objectives of projects [1, 2]. A practical option is presented to form financial models of commercializing the result of an innovative project to create a software and hardware complex (PAC) for automated visual inspection control (VIC) of boilers of thermal power plants (TPPs). The research is based on the principles of the formation of financial models for the commercialization of R&D results. A sales plan as the volume of services provided for the inspection of TPP equipment and an operation schedule with account for the potential PAC capabilities are proposed, and the price of the service is justified. The cost of a flight hour of operation of an unmanned aerial vehicle (UAV) is taken as a unit of service. The efficiency of R&D investments has been calculated considering the profit that ensures the payback of the project. A graphical interpretation of the relationship between the price of the PAC service and the expected net discounted income is given.
{"title":"Justification of Options for R&D Result Commercialization Considering the Principles of Financial Model Formation","authors":"M. N. Kaloshina, T. Yu. Nikolenko","doi":"10.3103/s1068798x24701521","DOIUrl":"https://doi.org/10.3103/s1068798x24701521","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The relevance of this research topic lies in the need to consider various options for building financial models to commercialize the results of innovative R&D with account for the specifics, goals, and objectives of projects [1, 2]. A practical option is presented to form financial models of commercializing the result of an innovative project to create a software and hardware complex (PAC) for automated visual inspection control (VIC) of boilers of thermal power plants (TPPs). The research is based on the principles of the formation of financial models for the commercialization of R&D results. A sales plan as the volume of services provided for the inspection of TPP equipment and an operation schedule with account for the potential PAC capabilities are proposed, and the price of the service is justified. The cost of a flight hour of operation of an unmanned aerial vehicle (UAV) is taken as a unit of service. The efficiency of R&D investments has been calculated considering the profit that ensures the payback of the project. A graphical interpretation of the relationship between the price of the PAC service and the expected net discounted income is given.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"33 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268645","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 : 2024-09-16DOI: 10.3103/s1068798x24701399
R. M. Aliev, T. R. Ablyaz, E. S. Shlykov, K. R. Muratov, V. B. Blokhin
Abstract
The use of additive technology—in particular, selective laser melting (SLM)—in producing wire electrodes for electrical discharge machining is considered. By this means it is possible to produce electrodes of high precision and complex geometry, with distinctive properties. In addition, the results of topological optimization in electrode design are presented. Topological optimization permits the production of wire electrodes that are more efficient in the given operating conditions. It is shown that, on the basis of additive technology and optimized electrode geometry with internal supply channels for dielectric liquid, the removal of sludge from the machining area may be improved, with consequent stabilization of the machining process.
{"title":"Improving the Productivity of Copy-Piercing Electrical Discharge Machining by Additive Manufacturing of Tool Electrodes","authors":"R. M. Aliev, T. R. Ablyaz, E. S. Shlykov, K. R. Muratov, V. B. Blokhin","doi":"10.3103/s1068798x24701399","DOIUrl":"https://doi.org/10.3103/s1068798x24701399","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The use of additive technology—in particular, selective laser melting (SLM)—in producing wire electrodes for electrical discharge machining is considered. By this means it is possible to produce electrodes of high precision and complex geometry, with distinctive properties. In addition, the results of topological optimization in electrode design are presented. Topological optimization permits the production of wire electrodes that are more efficient in the given operating conditions. It is shown that, on the basis of additive technology and optimized electrode geometry with internal supply channels for dielectric liquid, the removal of sludge from the machining area may be improved, with consequent stabilization of the machining process.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"37 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142250998","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 : 2024-09-16DOI: 10.3103/s1068798x2470148x
N. V. Arsen’eva, L. M. Putyatina, V. V. Kolosova, G. V. Tikhonov
Abstract
The need for integrated digital technologies at industrial enterprises is discussed. Currently, manufacturers in the engineering industry must take account of the short product life cycle and the volatility of market demand. Consequently, manufacturers must be nimble, responsive, and flexible. The ongoing introduction of digital technologies inaugurates a new era in manufacturing and permits improvement in production and industrial processes. The Internet of Things (the industrial Internet) allows manufacturers to collect and analyze huge quantities of data in real time from smart sensors, actuators in production lines, and products in the course of their operation. The goal is to speed up the introduction of more precise management methods. In the present work, trends in the digital transformation of industry are noted, and strategic prospects for their development are identified. Current approaches to digital technologies are still fragmentary and static. In other words, although high-tech enterprises have digitized some aspects of their production system, they are not yet able to quickly determine the influence of any incident on planning processes and current operations, including logistical, warehousing, and the global supply chain.
{"title":"Digital Transformation as an Effective Development Strategy for Industrial Enterprises","authors":"N. V. Arsen’eva, L. M. Putyatina, V. V. Kolosova, G. V. Tikhonov","doi":"10.3103/s1068798x2470148x","DOIUrl":"https://doi.org/10.3103/s1068798x2470148x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The need for integrated digital technologies at industrial enterprises is discussed. Currently, manufacturers in the engineering industry must take account of the short product life cycle and the volatility of market demand. Consequently, manufacturers must be nimble, responsive, and flexible. The ongoing introduction of digital technologies inaugurates a new era in manufacturing and permits improvement in production and industrial processes. The Internet of Things (the industrial Internet) allows manufacturers to collect and analyze huge quantities of data in real time from smart sensors, actuators in production lines, and products in the course of their operation. The goal is to speed up the introduction of more precise management methods. In the present work, trends in the digital transformation of industry are noted, and strategic prospects for their development are identified. Current approaches to digital technologies are still fragmentary and static. In other words, although high-tech enterprises have digitized some aspects of their production system, they are not yet able to quickly determine the influence of any incident on planning processes and current operations, including logistical, warehousing, and the global supply chain.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"198 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142251004","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 : 2024-09-16DOI: 10.3103/s1068798x24701417
A. A. Snezhko, A. A. Fadeev, E. A. Zhirnova, N. V. Zakharova, E. A. Karelina
Abstract
Monitoring of adhesive strength of coatings is considered. The influence of counterbody geometry in maintaining the sample area and of the adhesive base on the monitoring results is studied by computer modeling.
{"title":"Improved Monitoring of the Adhesive Strength of Coatings","authors":"A. A. Snezhko, A. A. Fadeev, E. A. Zhirnova, N. V. Zakharova, E. A. Karelina","doi":"10.3103/s1068798x24701417","DOIUrl":"https://doi.org/10.3103/s1068798x24701417","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Monitoring of adhesive strength of coatings is considered. The influence of counterbody geometry in maintaining the sample area and of the adhesive base on the monitoring results is studied by computer modeling.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268505","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 : 2024-09-16DOI: 10.3103/s1068798x24701570
V. F. Bezyazychniy, A. V. Smirnov, S. S. Kalugin
Abstract
The article presents recommendations for optimal selection of technological operations when repairing parts of aircraft gas turbine engines that are based on the associated labor hours, costs, and capability of ensuring the required engine service life and future reparability. For the purpose of selecting technological operations, a repair optimization algorithm based on a complex criterion is developed.
{"title":"Determination of Indicators for Optimal Selection of Technological Operations when Repairing Parts of Aircraft Gas Turbine Engines","authors":"V. F. Bezyazychniy, A. V. Smirnov, S. S. Kalugin","doi":"10.3103/s1068798x24701570","DOIUrl":"https://doi.org/10.3103/s1068798x24701570","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The article presents recommendations for optimal selection of technological operations when repairing parts of aircraft gas turbine engines that are based on the associated labor hours, costs, and capability of ensuring the required engine service life and future reparability. For the purpose of selecting technological operations, a repair optimization algorithm based on a complex criterion is developed.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268448","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 : 2024-09-16DOI: 10.3103/s1068798x24701636
N. V. Vulykh
Abstract
Local plastic surface deformation of parts after cutting is investigated. It is shown that, with variation in the substrate thickness, the reshaping of the microprojections when the deformation is comparable with the height of the initial profile affects the following parameters: the inclination at the base of the microprojection, the relative length of the smoothed section, and the displacement of the microprofile’s trough during constrained loading.
{"title":"Influence of the Substrate Thickness in Elastoplastic Deformation of a Microprofile under Orthogonal Constrained Loading","authors":"N. V. Vulykh","doi":"10.3103/s1068798x24701636","DOIUrl":"https://doi.org/10.3103/s1068798x24701636","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Local plastic surface deformation of parts after cutting is investigated. It is shown that, with variation in the substrate thickness, the reshaping of the microprojections when the deformation is comparable with the height of the initial profile affects the following parameters: the inclination at the base of the microprojection, the relative length of the smoothed section, and the displacement of the microprofile’s trough during constrained loading.</p>","PeriodicalId":35875,"journal":{"name":"Russian Engineering Research","volume":"105 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268506","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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