Готові списки джерел за темами / Magnetic abrasive treatment

Добірка наукової літератури з теми "Magnetic abrasive treatment"

Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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Статті в журналах з теми "Magnetic abrasive treatment"

Li, W. D., Ming Lv, and Sheng Qiang Yang. "Preliminary Research on the Post Treatment of Fluid Magnetic Abrasivetool." Key Engineering Materials 455 (December 2010): 161–64. http://dx.doi.org/10.4028/www.scientific.net/kem.455.161.

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Анотація:

Fluid magnetic abrasivetool(FMA) is one kind of latest finishing abrasivetool which is a sort of suspended fluid composed by magnetic particles, nonmagnetic abrasive particles, surfactants in a non-magnetizable carrier liquid. After a period of working time, the performance-life of the abrasivetool ended because of the cutting- blade of the abrasives particles being passive. While the most costly component- the magnetic particles (carbonyl iron particles) can be reused. This paper has made up two recovery flows to separated carbonyl iron particles from others.

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Singh, Palwinder, Lakhvir Singh, and Sehijpal Singh. "Finishing of Tubes using Bonded Magnetic Abrasive Powder in an Abrasive Medium." Powder Metallurgy Progress 20, no. 1 (June 1, 2020): 1–11. http://dx.doi.org/10.2478/pmp-2020-0001.

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Abstract Magnetic abrasive flow finishing (MAFF) is an unconventional process capable of producing fine finishing with machining forces controlled by a magnetic field. This process can be utilized for hard to achieve inner surfaces through the activity of extrusion pressure, combined with abrasion activity of a magnetic abrasive powder (MAP) in a polymeric medium. MAP is the key component in securing systematic removal of material and a decent surface finish in MAFF. The research background disclosed various methods such as sintering, adhesive based, mechanical alloying, plasma based, chemical, etc. for the production of bonded MAP. This investigation proposes bonded MAP produced by mechanical alloying followed by heat treatment. The experiments have been conducted on aluminum tubes to investigate the influence of different parameters like magnetic field density, extrusion pressure and number of working cycles. The bonded magnetic abrasive powder used in MAFF is very effective to finish tubes’ inner surfaces and finishing is significantly improved after processing.

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Mosina, T. V., V. V. Nepomnyashchii, K. A. Gogaev, S. M. Voloshchenko, and M. G. Askerov. "Composite ceramic powders for metal surface magnetic abrasive treatment." Refractories and Industrial Ceramics 52, no. 1 (May 2011): 41–43. http://dx.doi.org/10.1007/s11148-011-9361-6.

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Ikonnikov, Alexey, and Sergey Leonov. "Theoretical-Probability Model of Metal Removal During Magnetic-Abrasive Treatment." MATEC Web of Conferences 297 (2019): 09007. http://dx.doi.org/10.1051/matecconf/201929709007.

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Анотація:

The work is devoted to the issue of calculating material removal during magnetic abrasive processing. Cutting grains have random dimensional characteristics, are randomly located on the surface of the tool, the workpiece has an irregular profile. The cutting parts of the grain tops partially remove the chips, and partially elastically-plastic deform the metal. Part of the vertices falls into the risks on the surface of the workpiece formed by the previous machining, and part -into the risks from passing through the previous vertices. This process is determined by the probability of the contact of the top of the grain with the metal. The developed stochastic models make it possible to predict the removal of metal from the treated surface depending on the time and parameters of the operation, which creates the prerequisites for their use in the design of polishing operations.

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Chen, Y., and Dong Ying Ju. "Application of Rare Earth Permanent Magnet on Magnetic Abrasive Machining." Key Engineering Materials 336-338 (April 2007): 712–14. http://dx.doi.org/10.4028/www.scientific.net/kem.336-338.712.

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Анотація:

Because of the raw material elements and its purity and so on, the Nd-Fe-B permanent magnet, the strongest magnetic material, which needs artificial synthesis, can hardly be used directly. The performance of the permanent magnet has not yet been greatly developed owing to the limitation of the artificial synthesizing technology, of the powder sintering technology and that of the application. In this paper, the magnetic abrasive machining method as a new application is put forward, and from this viewpoint, are discussed the performance and the processing technology of the permanent magnet and the magnetic abrasive machining method. A sintering route combining the direction heat treatment technique to increase the magnetic energy is suggested.

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Tang, Liang, Xianguo Yan, Yijiang Jiang, Fan Li, and Haidong Zhang. "Effect of Magnetic Field Coupled Deep Cryogenic Treatment on Wear Resistance of AISI 4140 Steel." Advances in Materials Science and Engineering 2020 (March 30, 2020): 1–8. http://dx.doi.org/10.1155/2020/2589283.

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Анотація:

In this study, a new magnetic field coupled deep cryogenic treatment (MDCT) is developed and its effect on wear resistance of AISI 4140 steel is investigated. Compared with wear resistance of untreatment (UT), wear resistance of MDCT increases by 29%. Wear resistance is inversely proportional to the friction coefficient. The treatment promotes the phase transformation and dislocation movement to generate more martensite in multidirectional distribution and optimized carbide. It enhances material property and repairs surface defect. Moreover, the wear mechanism of MDCT is only abrasive wear in the form of microscopic cutting, while other process groups are oxidative wear and abrasive wear in the form of microscopic cutting and microscopic fracture.

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Akulovich, L. M., L. E. Sergeev, and M. M. Dechko. "Influence of properties of the working technological environment on the surface roughness and productivity during magnetic abrasive machining." Proceedings of the National Academy of Sciences of Belarus, Physical-Technical Series 67, no. 1 (April 6, 2022): 39–48. http://dx.doi.org/10.29235/1561-8358-2022-67-1-39-48.

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The results of experimental studies of the surface roughness parameters of ball bearing treadmills made of steel SHX-15 and the performance of the magnetic abrasive treatment process depending on the properties of the components of the working process medium are presented. The research used methods of mathematical modeling of the technological process of magnetic abrasive processing, subsequent analysis of the obtained multivariate regression equations to identify the most significant technological factors according to the criteria of their interaction and relative influence on surface roughness and processing performance. The relative total contribution to the change in the roughness of the treated surface (Ra, microns) and processing performance (ΔG, mg/min) was established: single control technological factors affect 29,1 % and 48,2 %, respectively; interacting control technological factors 46.8 % and 45.9 %, respectively. The controlling technological factors in descending order of the degree of influence by generalized significance are arranged in the sequence: hydrogen pH, gradient of magnetic induction B (T/mm), microhardness of abrasive HV (GPa), coolant viscosity γ (cSt), processing time t (s) and magnetic permeability µ (mH/m). The interpretation of the physical mechanisms of interaction of controlling technological factors is given. The obtained results of a quantitative assessment of the relative total contribution of single control technological factors can be used in assigning modes of magnetic abrasive treatment of bearing rings, and their interaction – in studies of the synergism of the parameters of the working technological environment, which allows obtaining a much greater effect than using each parameter separately.

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Avdeyev, Boris, Aleksey Vyngra, and Aleksander Bordiug. "Testing the efficiency of abrasive treatment of reconditioned parts using coolant cleaning in a magnetic sump." MATEC Web of Conferences 298 (2019): 00115. http://dx.doi.org/10.1051/matecconf/201929800115.

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Анотація:

This article discusses pilot study of effectiveness of abrasive machining of the recoverable parts for cleaning cooling lubricants involved in technological processes of processing of the parts. One of the cleaning methods is a magnetic sump, which has high efficiency at relatively low cost of operation and maintenance. Laboratory tests of the magnetic sump were carried out according to a full-factor experiment, varying with certain parameters in order to identify the purity index of cooling lubricant when cleaning from mechanical impurities. Dependencies are obtained that connect the value of purity index of coolant with the technological and structural parameters of the magnetic sump. The influence of the cooling lubricant purity index in the magnetic sump on the roughness of grinded surface of the samples was revealed. The most rational parameters of the magnetic sump have been determined at which optimum surface roughness is observed when processing the engine crankshaft using cooling lubricant cleaned in the magnetic sump.

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Havrushkevych, Andrii, Volodymyr Geichuk, Nataliia Havrushkevych, Olexander Kravets, and Alla Romashko. "METHOD OF DESIGNING ROTOR HEADS FOR FINISHING CYLINDRICAL PARTS WITH UNIFORMLY LOCATED ELEMENTS ON THE PERIPHERAL." Transactions of Kremenchuk Mykhailo Ostrohradskyi National University, no. 4(129) (August 23, 2021): 124–34. http://dx.doi.org/10.30929/1995-0519.2021.4.124-134.

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Анотація:

Purpose. The purpose of these studies is to develop a method designing rotor heads for finishing cylindrical parts with evenly spaced elements on the periphery and approbation a technique at development a design a rotor head for realization magnetic-abrasive processing cylindrical gear wheels over a ring bath. Methodology.The design technique is based on the synthesis of structural-kinematic schemes and structural formulas of rotary machine composing.In the synthesis process are analyzed the possible general coordinate transformations matrices of the forming system of the rotor heads.The general matrix coordinate transformations is selected by the results of a comprehensive assessment the criteria of the intensity of magnetic abrasive treatment and the shape of the edge. Findings.The design technique is rep- resented by an algorithm that includes the stages of synthesis structural-kinematic schemes and structural formulas of the composing rotary machines and the stage for determining their basic design parameters and dimensions. Originality.The algorithm of development structural-kinematic schemes and structural formulas arrangement rotary machines for magnetic-abrasive processing blanks in the stage of definition and choice of rational modes is im- proved.This allows you to get theparticular level of quality of processing that is best for the whole set of machined sur- faces and edges of the work pieces. Practicalvalue.The design technique has been tested in the design and construction of the rotor head for magnetic-abrasive processing gears over the ring bath. The design of the magnetic system with a double-circuit magnetic circuit is developed, which allows to increase the width of the working zone up to 150 mm, and the outer diameter of the processed gears up to 400 mm. Conclusions. As a result of the carried out researches the tech- nique and recommendations on designing of rotor heads for finishing of cylindrical details with equally located ele- ments on periphery(gears, end and axial cutting tools, etc.) are developed.To increase the efficiency of the technique, it is necessary to conduct additional studies of tribotechnical properties of magnetic-abrasive tools with a wider coverage of fractions of particles and processed materials and especially experimental studies of resistance forces during the movement of bodies in the working environment.

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Ustinovich, D. F., V. R. Sobol', and O. N. Mazurenko. "Low-Frequency Eddy Currents and Dissipative Processes under the Conditions of Magnetic Abrasive Treatment." Journal of Engineering Physics and Thermophysics 77, no. 1 (January 2004): 199–203. http://dx.doi.org/10.1023/b:joep.0000020739.85336.de.

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Дисертації з теми "Magnetic abrasive treatment"

Іщик, Дмитро Володимирович. "Підвищення якості свердел із швидкорізальної сталі при магнітно-абразивному обробленні". Master's thesis, Київ, 2018. https://ela.kpi.ua/handle/123456789/26703.

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Дисертація на здобуття наукового ступеня магістра за спеціальністю 133 – Галузеве машинобудування. – Національний технічний університет України "Київський політехнічний інститут імені Ігоря Сікорського". – Київ, 2018. Проаналізувавши сучасні методи покращення якості та продуктивності різальної кромки металорізального інструменту, на прикладі свердел, було обрано метод магнітно-абразивного оброблення. Даний метод дозволив досягти значного покращення якості різальної кромки (шорсткості), збільшення значення твердості поверхневого шару і відповідно – періоду стійкості свердла. В дисертації проаналізовано шляхи вирішення проблеми стійкості інструменту при роботі, досліджено процес МАО шляхом проведення експлуатаційних випробувань свердел, оброблених цим методом. Магнітно-абразивні порошки було підібрано зважаючи на поперед ні роботи в цій галузі, а саме – використали порошки великих фракцій. Результати досліджень підтвердили доцільність їх використання наряду з порошками малих фракцій. Експериментальні дані використані та впроваджені на підприємстві ДП «Київський бронетанковий завод».
Dissertation for a Master's degree in specialty 133 – Branch mechanical - engineering. - National Technical University of Ukraine "Kyiv Polytechnic Institute named after Igor Sikorsky". - Kyiv, 2018. Having analyzed the modern methods of improving the quality and productivity of the cutting edge of the metal cutting tool, on the example of the drill, the method of magnetic abrasive treatment was chosen. This method has allowed to achieve a significant improvement in the quality of the cutting edge (roughness), an increase in the hardness of the surface layer and, respectively, the period of drill firmness. In the dissertation the ways of solving the problem of instrument stability during work are analyzed, the process of MAO is investigated by carrying out operational tests of the drills processed by this method. Magnetically-abrasive powders were selected in the light of previous work in this field, namely, the use of powders of large fractions. The results of the studies confirmed the feasibility of their use, along with small fractions powders. Experimental data were used and implemented at the enterprise "Kyiv Armored Plant".

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Тези доповідей конференцій з теми "Magnetic abrasive treatment"

Ikonnikov, A. M. "Analysis of Magnetic Forces in the Working Clearance with Magnetic-Abrasive Treatment of Inductors on Standing Magnets." In Modern Trends in Manufacturing Technologies and Equipment. Materials Research Forum LLC, 2022. http://dx.doi.org/10.21741/9781644901755-31.

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Анотація:

Abstract. The authors describe the method of calculating the magnetic forces in the working gap in the case of magnetically abrasive machining of flat surfaces of billets from magnetic materials by the periphery of a circular inductor on permanent magnets. The application of the software package ANSIS Maxwell for the calculation of the magnetic induction method in the working gap and the magnetic forces of the magnetically abrasive powder acting on the grain is shown. As a result of the work, the magnetic induction in the working gap was calculated for magnetically abrasive machining of flat surfaces of billets from magnetic materials by an inducer on permanent magnets. Also, calculations showed the distribution of the magnetic abrasive powder in the working gap, depending on the material of the workpiece being processed. In the case of magnetically abrasive machining of a magnetic workpiece, the powder in the working gap is concentrated in the zones with the greatest density of force lines - under the inductor poles. An analysis is made of the distribution of magnetic forces in the working gap during magnetic abrasive machining.

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