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1
Content available A simulation study of Industry 4.0 factories based on the ontology on flexibility with using FlexSim® software
100%
Luściński S. , Ivanov V.
Management and Production Engineering Review
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2020
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tom Vol. 11, No. 3
74--83
EN
The main aim of the article is to develop a simulation model of flexible manufacturing system with applying the ontology on flexibility. Designing manufacturing systems matching both production and market requirements becomes more and more challenging due to the variability of demand for a large number of products made in many variants and short lead times. Manufacturing flexibility is widely recognised as a proven solution to achieve and maintain both the strategical and operational goals of the companies exposed to global competition. Generic simulation model of flexible manufacturing system was developed using FlexSim® 3D software, then the example data were used to demonstrate the developed model applicability. “The Ontology on Flexibility” was applied for evaluation of achieved flexibility of manufacturing system.
2
Content available An integrated approach for improving tool provisioning efficiency
80%
Denysenko Y. , Ivanov V. , Luscinski S. , Zaloga V.
Management and Production Engineering Review
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2020
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tom Vol. 11, No. 4
4--12
EN
The specificity of tool provisioning is conditioned using tooling, the quantity of which exceeds the nomenclature of the manufactured goods considerably. Therefore, for modern enterprises, first-priority issues are harmonizing the processes of tool provisioning systems, increasing the level of the reaction of this system to changes, obtaining operational control over the production system, and, thus, improving the efficiency of the production process. In this paper, a mathematical model of decision-making based on determining the optimal strategy for the process flow was proposed to improve the efficiency of the information system for quality management of tool provisioning. It is suggested to use the sustainable development factor of information system for quality management of tool provisioning to make decisions about the path of the tooling process, which considers the requirements of international standards for management systems (ISO 9001, ISO 45001, etc.). This model is based on the application of graph optimization theory, fuzzy logic, and Markov chains. The use of this model is universal and will increase the validity of operational management decisions, increase productivity, reduce resource dependency, and, therefore, reduce the costs of tool provisioning, which directly affects the cost of production and competitiveness of the enterprise as a whole.
3
Content available Ensuring economic efficiency of flexible fixtures in multiproduct manufacturing
80%
Ivanov V. , Liaposhchenko O. , Denysenko Y. , Pavlenko I.
Engineering Management in Production and Services
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2021
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tom Vol. 13, no. 1
53--62
EN
The first-priority directions for modern engineering, especially for multiproduct manufacturing, include the intensification of manufacturing processes, increasing the efficiency of technological equipment, and reducing the time required to implement technological solutions. Fixture design is a complicated and time-consuming process that requires considering many parameters of the closed-loop technological system “machine tool — fixture — cutting tool — workpiece”. One machined part can have several fixture layouts corresponding to all specified parameters; however, their effectiveness differs depending on production conditions. Search for an optimal fixture for specified production conditions is an essential stage of production planning. It has been proved that the efficiency of a manufacturing process should be assessed using single economic indicator — the cost of machining, which considers the costs of time, the total costs for process realisation, and a batch of parts. The paper aims to substantiate the efficiency of manufacturing processes in machining complex parts using flexible fixtures by developing a mathematical model that considers the cost of time, the cost of implementing the manufacturing process, and the batch value of parts production. This approach estimates the efficiency of manufacturing processes for machining complex parts and choosing the flexible fixture layout that corresponds to specific production conditions. It was proved that flexible fixtures could be effectively used for machining small batches of parts with frequent readjustments to new workpieces and short-term machining. A tendency has been established that the higher number of nomenclature of parts contributes to expanding the scope of the effective use of flexible fixtures.
4
Content available remote Modeling of high-speed flywheel designs for technological equipment
70%
Dehtiarov I. , Antosz K. , Avramenko S. , Herasko K. , Ivanov V.
Technologia i Automatyzacja Montażu
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2021
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tom nr 2
13--19
PL
W artykule przeanalizowano konstrukcję napędów mechanicznych oraz obszary ich zastosowania. Na podstawie przeprowadzonej analizy opracowano projekt napędu kinetycznego opartego na sprzęgle z materiału kompozytowego, przeznaczonego do pracy z wysoką częstotliwością obrotową. Zaproponowano najbardziej optymalne koła zamachowe pod względem akumulacji energii kinetycznej i jednocześnie maksymalnej wytrzymałości konstrukcji oraz przeprowadzono ich symulację numeryczną. Na podstawie wyników analizy modalnej ustalono wartości i postaci częstotliwości własnych oscylacji wirników ze sprzęgłami o różnych konstrukcjach, co pozwala na sterowanie procesem, znając graniczne wartości maksymalnej dopuszczalnej częstotliwości obrotów. Na podstawie modelowania numerycznego ustalono, że kształt sprzęgła oraz jego masa mają istotny wpływ na ograniczenie prędkości obrotowej. Jednocześnie sprzęgło o najmniejszej masie, ale największej częstotliwości obrotów ma maksymalną jednostkową energochłonność, co świadczy o tym, że jest to najbardziej efektywny wariant pod względem kosztów materiałowych i zastosowania tej konstrukcji w urządzeniach do gromadzenia energii podczas pracy urządzeń technologicznych. Porównano koszt dla sprzęgła o zawartości materiału kompozytowego powyżej 68% z kosztem sprzęgła, które ma maksymalną wartość jednostkową energochłonności na 1 kg masy.
EN
The article analyzes the design of mechanical energy drives and their use areas. Based on the analysis, the kinetic energy drive designis based on the composite material's flywheel, capable of working with a high frequency of rotation. The most optimal flywheels in terms of accumulation of kinetic energy and at the same time the maximum strength of the design are proposed, and their numerical simulation is carried out. The modal analysis results established the values and forms of the eigenfrequencies of oscillations of rotors with flywheels of various structures, which allows controlling the process of overclocking, knowing the limit values of the maximum permissible frequency of rotation of the flywheels. Numerical modeling established that the flywheel's shape and its mass significantly affect the rotor speed limit with the flywheel. At the same time, the flywheel with the lowest mass but the highest frequency of rotation has the maximum specific energy intensity per unit of mass, which determines it as the most effective option in terms of the cost of material and the use of this design in devices for energy accumulation during the operation of technological equip-ment. The calculation results also show that the lamb flywheel has the most incredible absolute energy in-tensity. Simultaneously, the costs of the composite material above 68% are compared with the flywheel, which has the maximum specific value of the energy intensity per 1 kg of its mass.
5
Content available Technology for complex parts machining in multiproduct manufacturing
70%
Ivanov V. , Dehtiarov I. , Pavlenko I. , Kosov I. , Kosov M.
Management and Production Engineering Review
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2019
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tom Vol. 10, No. 2
25–-36
EN
At present, the speed of production and its complexity increases with each passing year due to the shorter product life cycle and competition in the global market. This trend is also observed in the machine-building industry, therefore, in order to ensure the competitiveness of enterprises and reduce the cost of production, it is necessary to intensify production. This is especially true in the machining of complex parts that require a great number of setups, and technological equipment. The problem-oriented analysis of complex parts was carried out, the parts classification was structured and developed according to the design and technological features. This made it possible to offer advanced manufacturing processes for complex parts like levers, forks, and connecting rods. The flexible fixtures for specified complex parts were developed. The effectiveness of the proposed manufacturing processes, as compared with the typical ones, provides significant improvement in the production.
6
Content available Ensuring the economic efficiency of enterprises by multi-criteria selection of the optimal manufacturing process
61%
Kotliar A. , Basova Y. , Ivanov V. , Murzabulatova O. , Vasyltsova S. , Litvynenko M. , Zinchenko O.
Management and Production Engineering Review
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2020
|
tom Vol. 11, No. 1
52--61
EN
Technological assurance and improvement of the economic efficiency of production are the first-priority issues for the modern manufacturing engineering area. It is possible to achieve a higher value of economic efficiency in multiproduct manufacturing by multicriteria optimization. A set of optimality criteria based on technological and economic indicators was defined with the aim of selecting the optimal manufacturing process. Competitive variants and a system of optimization were developed and investigated. A comparative analysis of the optimality criteria and their influence on the choice of optimal machining processes was carried out. It was determined that the batch of parts made an impact on the selection of the manufacturing process.
7
Content available Crystal Lattice Damage and Recovery of Rare-Earth implanted Wide Bandgap Oxides
51%
Sarwar M. , Ratajczak R. , Ivanov V. , Mishra S. , Turek M. , Wierzbicka A. , Woźniak W. , Guziewicz E.
Advances in Science and Technology. Research Journal
|
2022
|
tom Vol. 16, no 5
147--154
EN
Rare earth (RE) elements are important for the optical tuning of wide bandgap oxides (WBO) such as β-Ga2O3 or ZnO, because β-Ga2O3:RE or ZnO:RE show narrow emission lines in the visible, ultra-violet and infra-red region. Ion implantation is an attractive method to introduce dopant into the crystal lattice with an extraordinary control of the dopant ion composition and location, but it creates the lattice damage, which may render the dopant optically inactive. In this research work, we investigate the post-implantation crystal lattice damage of two matrices of wide-bandgap oxides, β-Ga2O3 and ZnO, implanted with rare-earth (RE) to a fluence of 5 x 10^14, 1 x 10^15 and 3 x 10^15 atoms/cm^2, and post-growth annealed in Ar and O2 atmosphere, respectively. The effect of implantation and annealing on both crystal lattices was investigated by channeling Rutherford backscattering spectrometry (RBS/C) technique. The level of crystal lattice damage caused by implantation with the same RE fluences in the case of β-Ga2O3 seems to be higher than in the case of ZnO. Low temperature photoluminescence was used to investigate the optical activation of RE in both matrices after performed annealing.
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