Готові списки джерел за темами / MAGNETIC ABRASIVE PARTICLES

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Добірка наукової літератури з теми "MAGNETIC ABRASIVE PARTICLES"

Автор: Grafiati

Опубліковано: 11 вересня 2023

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Статті в журналах з теми "MAGNETIC ABRASIVE PARTICLES"

Patil, Mahadev Gouda, Kamlesh Chandra, and P. S. Misra. "Study of Magnetic Abrasive Finishing Using Mechanically Alloyed Magnetic Abrasives." Advanced Materials Research 585 (November 2012): 517–21. http://dx.doi.org/10.4028/www.scientific.net/amr.585.517.

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Анотація:

The finishing characteristics of mechanically alloyed magnetic abrasives used in cylindrical magnetic abrasive finishing (MAF) are presented in this study. Mechanical alloying is a solid state powder processing technique, where the powder particles are subjected to impact by the balls in a high energy ball mill or attritor at room temperature. After the process, fine magnetic abrasives are obtained in which the abrasive particles are attached to the base metal matrix without any bonding material. The magnetic particle used in the magnetic abrasive production is iron powder and the abrasive is aluminium oxide. Magnetic abrasives play the role of cutting tools in MAF, which is emerging as an important non-conventional machining process. The experiments performed on stainless steel tubes examine the effects of varying the quantity of magnetic abrasives, magnetic flux density, speed of rotation of the workpiece and amount of lubricant. The surface roughness measurements demonstrate the effects of the abrasive behaviour on the surface modification. The surface roughness was analysed in terms of percentage improvement in surface finish (PISF). The obtained maximum PISF was 40 % and the minimum surface roughness was 0.63 μm Ra.

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Zhao, Xuefeng, Hao Qin, Yong Yang, Ke You, Xiaolong Yin, and Yin Yuan. "Study on magnetic preparation of dual disk based on silica gel magneto-elastic abrasive particles." Xibei Gongye Daxue Xuebao/Journal of Northwestern Polytechnical University 39, no. 6 (December 2021): 1304–11. http://dx.doi.org/10.1051/jnwpu/20213961304.

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Анотація:

Magneto-elastic abrasive grains have magnetism, low elastic modulus and excellent abrasive performance, and have the characteristics of bonded abrasive grains and loose abrasive grains. The dual-disk magnetic preparation greatly improves the preparation quality and efficiency. Firstly, the magneto-elastic abrasive particles are introduced into the edge preparation of the dual-disk magnetic tool, and the preparation method of 4035 silica gel magneto-elastic abrasive particles is proposed. According to the microscopic characteristics of the magneto-elastic abrasive particles, the finite element software ABAQUS is used to establish the magneto-elastic abrasive particles. The meso-level representative volume element (RVE) model is built to analyze the stress and strain law of magneto-elastic abrasive particles under tension and compression. Secondly, an experimental platform for magnetic preparation of magneto-elastic abrasive particles with dual disks was built to analyze the force of magneto-elastic abrasive particles. Finally, Through the magnetic preparation experiment of the magneto-elastic abrasive dual-disk magnetic force, the influence of the disk rotation speed, abrasive particle size and relative magnetic permeability on the cutting edge wear is studied. And compared to the magnetic abrasive particles double-disk magnetic and drag finishing method, the magneto-elastic abrasive particle double-disk magnetic preparation method can obtain the maximum edge wear amount and the maximum surface roughness decreasing amplitude. The research results are of great significance to promote the progress of our country's magnetic high-efficiency processing and magneto-finishing processing technology.

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Li, Wei Dong, Ming Lv, and Hong Zhang. "The Role of Nanometer Silicon Dioxide in the Modification of Fluid Magnetic Abrasive." Materials Science Forum 694 (July 2011): 229–33. http://dx.doi.org/10.4028/www.scientific.net/msf.694.229.

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Анотація:

The fluid magnetic abrasive (FMA) is a new type of precision finishing abrasives which is a sort of suspended fluid composed by magnetic particles, nonmagnetic abrasive particles, surfactants in a non-magnetizable carrier liquid. This paper is to solve the contradiction of disperser stability by adding the surface active agent (dispersing agent), the nano- particles etc.

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Chen, Yan, M. M. Zhang, and Z. Q. Liu. "Study on Sintering Process of Magnetic Abrasive Particles." Advanced Materials Research 337 (September 2011): 163–67. http://dx.doi.org/10.4028/www.scientific.net/amr.337.163.

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Анотація:

The magnetic abrasive prepared by sintering method, the aim is to change the internal structure of abrasive particles by sintering method, make the abrasive particles parceled on the surface of magnetic iron particles, and compared with the abrasive particles phase to get a kind of magnetic abrasive particles with high durability, strong magnetic, which can be magnetized in a magnetic field and improve processing efficiency and surface quality in magnetic abrasive machining. Sintering is used to prepare magnetic abrasive in this paper, to make iron particles, abrasive particles mixed with some binder, after suppression, drying, sintering, cooling, crushing and screening. This paper makes analysis for surface morphology and composition of the magnetic abrasive particles by scanning electron microscopy and discusses the effect that the abrasive particles size ratio, sintering time, sintering temperature on the magnetic abrasive, and the preparation of the magnetic abrasive process has been optimized.

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Chen, Yan, Yan Jun Li, Yao Ming Zhang, and Xu Zhang. "Study on Preparation Process of Magnetic Abrasive Particles." Materials Science Forum 750 (March 2013): 7–10. http://dx.doi.org/10.4028/www.scientific.net/msf.750.7.

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Анотація:

Abstract: With the industrial development and improvement of mechanical product quality, the demand of part surface quality and accuracy gets more and more high. As some parts of complex shape, can’t be machined by the traditional processing technology, therefore, the magnetic abrasive technique was proposed. The magnetic abrasive particles play an important role in the magnetic abrasive finishing, it use strong magnetic iron particles and abrasive particles mixed together (called magnetic abrasive). The prepared method of magnetic abrasive one of is sintering method, the aim is to change the internal structure of abrasive particles, make the abrasive particles is distributed on the surface of magnetic iron particles, get a kind of magnetic abrasive, which can be magnetized in a magnetic field and improve processing efficiency and surface quality in magnetic abrasive finishing. In this paper, sintering method is used to make iron particles, abrasive particles mixed with some binder, after suppression, drying, sintering, cooling, break up and sieving, analysis surface morphology and composition of the magnetic abrasive particles by scanning electron microscopy, discusses the effect of the abrasive particles size ratio, sintering time, sintering temperature for the finishing performs, the preparation process of the magnetic abrasive has been optimized, work out the standard of preparation of the magnetic abrasive process

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Liao, G. B., M. M. Zhang, Y. J. Li, Z. Q. Liu, and Yan Chen. "Research on Tests of Magnetic Abrasive Finishing by Sintering Method." Key Engineering Materials 487 (July 2011): 273–77. http://dx.doi.org/10.4028/www.scientific.net/kem.487.273.

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Анотація:

This paper mainly illustrates the magnetic abrasive finishing by sintering method and research on tests of magnetic abrasive finishing, analyses the effect of the sintering temperature, ratio of magnetic and abrasive particle size, sintering time and sintering characteristics of magnetic particles on magnetic abrasive during the finishing process, so as to achieve a better process and principle for magnetic abrasive finishing.

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Yu, Juan, Qiu Sheng Yan, Jia Bin Lu, and Wei Qiang Gao. "Research on Material Removal of a New Micro Machining Technology Based on the Magnetorheological Effect of Abrasive Slurry." Key Engineering Materials 364-366 (December 2007): 914–19. http://dx.doi.org/10.4028/www.scientific.net/kem.364-366.914.

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Анотація:

Based on the magnetorheological (MR) effect of abrasive slurry, the particle-dispersed MR fluid is used as a special instantaneous bond to cohere abrasive particles and magnetic particles so as to form a dynamic, flexible tiny-grinding wheel to polish optical glass, ceramic and other brittle materials of millimeter or sub-millimeter scale with a high efficiency. Experiments were conducted to reveal the effects of different process parameters, such as grain sizes of abrasive particles, machining time, machining gap between the workpiece and the rotation tool, and rotation speed of the tool, on material removal rate of glass surface. The results indicate the following conclusions: material removal rate increases when the grain size of abrasives is similar to that of magnetic particles; machining time is directly proportional to material removal, but inversely proportional to material removal rate; machining gap is inversely proportional to material removal; polishing speed has both positive and negative influence on material removal rate, and greater material removal rate can be obtained at a certain rotation speed. In addition, the difference of the machining characteristics between this new method and the traditional fixed-abrasive machining method is analyzed.

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Ido, Yasushi, Takaya Yamaguchi, and Hitoshi Nishida. "Numerical Analysis of the Polishing Process of Inner Tube Wall Using Micron-Size Particles in Magnetic Fluids." Materials Science Forum 670 (December 2010): 110–17. http://dx.doi.org/10.4028/www.scientific.net/msf.670.110.

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Distribution and behaviour of micron-size magnetic particles and nonmagnetic particles in magnetic fluids in the polishing process of inner wall of small tube is investigated numerically by using the particle method based on the simplified Stokes dynamics. In this study, it is shown that chain-like clusters of both magnetic particles and those of nonmagnetic abrasive particles are formed between the two magnetic poles. The clusters are strongly held during the polishing process. The clusters of the nonmagnetic abrasive particles are surrounding the clusters of magnetic particles and they are combined with each other.

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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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Yuan, Wei, Haotian Wang, Qianjian Guo, Wenhua Wang, Yuqi Zhu, Jie Yu, and Xianhai Yang. "Study on Wear Mechanism of Helical Gear by Three-Body Abrasive Based on Impact Load." Materials 15, no. 12 (June 10, 2022): 4135. http://dx.doi.org/10.3390/ma15124135.

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This study aimed to explore the wear characteristics and evolution mechanisms of large-scale wind power gears under the impact load of particles of the three-body abrasive Al2O3 (0.2 mg/mL) from four aspects: oil analysis, vibration analysis, amount of gear wear, and tooth-surface-wear profile analysis. A magnetic powder brake was used to simulate the actual working conditions. Combined with the abrasive particle monitoring and the morphology analysis of the tooth-surface-wear scar, by setting quantitative hard particles in the lubricating oil, the gears are mainly operated in the abrasive wear state, and wear monitoring and wear degree analysis are carried out for the whole life cycle of the gears. Oil samples were observed and qualitatively analyzed using a particle counter, a single ferrograph, a metallographic microscope, and a scanning electron microscope. The experiments demonstrate that the initial hard particles have a greater impact in the early wear stage of the gears (<20 h), and abrasive particle concentration increases by 30%. This means that Al2O3 particles accelerate the gear wear during the running-in period. The loading method of the impact load on the oblique gear exacerbates the abrasion particle wear and expands the stress concentration, which reduces the surface of large milling particles on the surface, and reduces the width of the tooth (the part above the pitch line is severely worn), which causes the gear to break into failure. The research provides help for analyzing the mechanism of abrasive wear of gears and predicting wear life.

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Більше джерел

Дисертації з теми "MAGNETIC ABRASIVE PARTICLES"

MONIKA. "DEVELOPMENT AND CHARACTERIZATION OF MAGNETIC ABRASIVE PARTICLE USING SOLID PHASE SINTERING." Thesis, 2016. http://dspace.dtu.ac.in:8080/jspui/handle/repository/14786.

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Анотація:

Magnetic abrasive particles (MAPs) have been developed using solid phase sintering method. Carbonyl iron powder of 20 volume% and silicon carbide abrasives of 3000 mesh size with 25 volume% have been uniformly mixed in ball mill. After mixing the powder, the pellets of 5 gram each have been prepared at 8 ton pressure using cylindrical die of 7 mm diameter and 50 mm length. The pellets have been sintered at 1000°C in inert atmosphere of argon using appropriate sintering cycle. After sintering, the furnace cooling was done in inert atmosphere of argon upto environment temperature. After sintering, the sintered pellets have been crushed in ball mill to obtain the required size of the magnetic abrasive particles. The morphology and elemental composition as well as particle size of magnetic abrasive particles have been studied with scanning electron microscope (SEM) and energy dispersive spectrometer (EDS). The different phases of magnetic abrasive particles have been studied using X-ray diffraction (XRD). The microstructure of magnetic abrasive particles has also been studied with optical microscope.

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Частини книг з теми "MAGNETIC ABRASIVE PARTICLES"

Wu, Yong Bo, Kunio Shimada, Y. C. Wong, and M. Kato. "Effects of Particles Blend Ratio on Surface Quality in Surface Polishing Using Magnetic Polishing Liquid (MPL)." In Advances in Abrasive Technology VIII, 337–42. Stafa: Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-974-1.337.

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Chen, Y., Q. H. Song, X. Wang, and Ning Ma. "Study on the Characteristics of Simply Mixed the Magnetic Abrasives Particles." In Advanced Materials Research, 133–38. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-461-8.133.

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Тези доповідей конференцій з теми "MAGNETIC ABRASIVE PARTICLES"

Ratay, Jason, and Hitomi Yamaguchi. "Characteristics of Diamond Abrasive Used in Magnetic Abrasive Finishing of Nickel-Based Superalloys." In ASME 2020 15th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/msec2020-8365.

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Abstract Nickel-based superalloys have a wide range of high-temperature applications, such as turbine blades. The complex geometries of these applications and the specific properties of the materials raise difficulties in the surface finishing. Magnetic abrasive finishing (MAF) has proven effective in finishing the complex geometries. In MAF, the magnetic properties of the workpiece, tool, and abrasive play important roles in controlling finishing characteristics. This paper presents the effects of nickel coating on the abrasive behavior during finishing and resulting finishing characteristics of Ni-based superalloys. The Ni-coated diamond abrasive is more attracted to the magnet than the Ni-based superalloy surface. As a result, fewer Ni-coated diamond abrasive particles, which are stuck between the magnetic-particle brush and the target surface, participate in surface finishing. Because of this, coupled with the reduced sharpness of abrasive cutting edges due to the coating, Ni-coated diamond abrasive cannot effectively smooth the target surface in MAF. However, the Ni coating is worn off during finishing of the hard, rough, additively manufactured surface. Then, the diamond abrasive participates in finishing as uncoated diamond abrasive and facilitates the material removal, finishing the target surface.

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Yamaguchi, Hitomi, and Kotaro Hanada. "Development of Spherical Magnetic Abrasive Made by Plasma Spray." In ASME 2007 International Manufacturing Science and Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/msec2007-31191.

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Magnetic abrasive used for the internal finishing of capillary tubes, which prevents accumulation of contamination and erratic flow of the conveyed fluid, is a composite particle, consisting of iron and Al2O3 abrasive grains. The irregularity of the magnetic abrasive shape, due to the mechanical crushing process, causes non-uniform depth of cut of the abrasive and restricts the improvement of the finished surface quality. This has resulted in a narrow range of finishing performance. Moreover, the irregularity of the magnetic abrasive shape brings about difficulty in merely introducing it into capillary tubes. To break through these difficulties, this research proposes to develop a spherical iron-based magnetic abrasive, which carries Al2O3 grains on the surface, made by plasma spray. This paper firstly examines the feasibility of the plasma spray to make the existing magnetic abrasive more spherical, and suggests the conditions needed to produce the spherical magnetic abrasive. Secondly, it studies the development of the new spherical magnetic abrasive made of separate particles: iron particles and Al2O3 abrasive grains, which carries the nonferrous abrasive on the outer surface alone. Their finishing performance, evaluated through the experiments using SUS304 stainless steel tubes, shows their applicability to magnetic abrasive finishing.

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Jha, Sunil, and V. K. Jain. "Evaluation of Rheological Properties of Magnetorheological Polishing Fluid and Their Effect on Surface Finish in Ultra Precision Finishing Processes." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-64260.

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Magnetorheological finishing (MRF) process for automated lens finishing and Magnetorheological abrasive flow finishing (MRAFF) for internal geometries rely on unique smart behavior of MRP-fluid. The rheological properties of MRP-fluid depend on carbonyl iron particle (CIP) and silicon carbide (SiC) particle size, their volume concentration, magnetic properties and applied magnetic field strength. To study the effect of particle size on rheological properties of MRP-fluid, a hydraulically driven specially designed capillary rheometer is fabricated. The best surface finish improvement was obtained with MRP-fluid containing approximately equal diameter of abrasive particles and CIPs. Least improvement was noticed with smaller CIPs and bigger abrasive combinations used. This is because the smaller size CIPs are incapable of providing the necessary finishing forces for bigger abrasive particles, which results in weak bonding strength.

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Sun, Huanwu, and Shichun Yang. "Fluid Magnetic Abrasives Based on Micron-Sized Carbonyl-Iron Particles and Its Applications in the Precision Finishing Process." In 2007 First International Conference on Integration and Commercialization of Micro and Nanosystems. ASMEDC, 2007. http://dx.doi.org/10.1115/mnc2007-21185.

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The fluid magnetic abrasive (FMA) is a new type of precision finishing abrasives, which is typically prepared by dispersing the magnetic particles, nonmagnetic abrasives, surfactants in a non-magnetizable carrier liquid. As the functional particles, the characteristics of magnetic particles have a great impact on the properties of FMA. In our experiment, the micron-sized carbonyl-iron (CI) particles (typical size: 3 μm–5 μm) are found to be ideally suited for the preparation of FMA. In this paper, the selections of micron-sized carbonyl-iron particles suitable for the FMA, the preparation techniques, the finishing mechanism and finishing process are presented. Some key parameters of FMA that may affect the finishing efficiency and the final surface roughness are analyzed theoretically. The experimental results are discussed as well in this paper.

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Ma, Lei, Toshiki Hirogaki, Eiichi Aoyama, Wei Wu, and Tatsuya Furuki. "Control of Pressing Force in Magnetic Abrasive Finishing Using Permanent Magnet End-Mill Tool." In ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. American Society of Mechanical Engineers, 2017. http://dx.doi.org/10.1115/msec2017-2781.

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Анотація:

The magnetic abrasive finishing (MAF) process is well known because of its high efficiency in yielding a mirror gloss finish zone. Clarification of the high efficiency machining mechanism has indicated that this high efficiency is obtained by iron particle cutting and the simultaneous polishing of alumina abrasives. This process yields unevenness, which is often evident on the workpiece surface. In a previous report, we compared magnetic polishing brushes consisting of iron powder paste (commercial paste) or steel balls (uniform size), and found that a large variation was generated when the magnetic polishing brush approached the workpiece surface in both cases. In this paper, we make slight changes to the steel-ball shape, obtaining saddle and barrel-shaped iron particles via stamping processing. The aim is to observe the control factor of the pressing force for these three different iron particle shapes and for different particle numbers, using a force sensor and a high-speed camera. The relationship between the iron particle shape, the iron particle number and the pressing force control is also explored in an attempt to discuss the mechanism behind the iron particle shape effect on the frictional force generation between the iron particles. It is found that the force variation can be reduced by adjusting the particle shape and number, which effectively reduces the damage caused when the brush approaches the workpiece surface.

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Yamaguchi, Hitomi, Takeo Shinmura, and Megumi Sekine. "Factors Affecting the Finishing Characteristics of an Internal Magnetic Abrasive Finishing Process for High Purity Fittings." In ASME 2004 International Mechanical Engineering Congress and Exposition. ASMEDC, 2004. http://dx.doi.org/10.1115/imece2004-62202.

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Анотація:

In the case of internal finishing of the bent section of a complex shaped tube, such as found in high purity fittings, by a magnetic abrasive finishing process, the magnetic field at the finishing area and, therefore, the finishing force are hardly uniform over the entire finishing area due to the geometry. This affects the abrasive behavior against the inner surface of the bent section, changing the finishing characteristics of SUS304 stainless steel fittings. In practice, non-uniformities in the surface finish remain at the bent section between the inside, outside, and lateral regions. This unevenness combines to cause difficulties in achieving uniform finishing. Magnetic abrasive is generally supplied with ferrous particles, and the ferrous particles experience greater magnetic force and play a role in pressing the magnetic abrasive against the target surface. This paper studies the finishing mechanism in view of the relationship between the magnetic field, the ferrous particles mixed with magnetic abrasive, and the finishing characteristics. The experiments identify the finishing conditions required for successfully diminishing the non-uniformity in the finished surface, and methods are recommended to satisfy the required conditions. The experiments using the proposed methods show the feasibility of producing a uniformly finished mirror surface.

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Barman, Anwesa, and Manas Das. "Analysis of Forces During Spot Finishing of Titanium Alloy Using Novel Tool in Magnetic Field Assisted Finishing Process." In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6352.

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Анотація:

Magnetic field assisted finishing process is a nanofinishing process which uses magnetic field for precise control of finishing forces. Magnetorheological fluid mixed with diamond abrasive particles in base medium of glycerol, hydrofluoric acid, nitric acid, and deionized water is used as the polishing medium. The novel tool is a magnet fixture made of mu-metal which is used to hold the magnet during finishing. In the present experimental study, finishing at a spot on flat titanium alloy is carried out to analyze the forces involved in the finishing. Normal force is the main force responsible for the indentation by the abrasive particle on the workpiece surface. Tangential force helps in removing indented material. The measured normal force and tangential force during the spot finishing are 3.285 N and 0.43 N, respectively. The final surface roughness achieved after spot finishing is 10 nm from initial surface roughness of 200 nm. The percentage improvement in surface roughness is 95%.

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Lee, Pil-Ho, Haseung Chung, Patrick Steven McCormick, Patrick Kwon, Hoa Nguyen, Yuhang Yang, and Chenhui Shao. "Experimental and Statistical Study on Magnetic-Field Assisted Finishing of Mold Steel Using Nano-Scale Solid Lubricant and Abrasive Particles." In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6544.

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Анотація:

Magnetic field-assisted finishing (MAF) is a surface quality enhancing process that utilizes a flexible brush composed of ferrous metal and abrasive particles. This paper experimentally and statistically investigates the characteristics of a MAF process with nano-scale solid lubricant. A new MAF tool was developed by integrating iron and abrasive particles, and nano-scale solid lubricant. In this experiment, the optical microscopic images of the surface are obtained to measure the surface roughness resulting from MAF processes with varying the content of abrasive particles and the presence of nano-scale solid lubricant. Furthermore, spatial statistics techniques are used to quantitatively evaluate the quality of the surface resulting from each combination of MAF parameters. It is demonstrated that the size and type of abrasive particles mainly affect MAF process and the newly developed MAF tool with nano-scale solid lubricant can improve the final surface quality.

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Jain, V. K., Pankaj Singh, Puneet Kumar, Ajay Sidpara, Manas Das, V. K. Suri, and R. Balasubramaniam. "Some Investigations Into Magnetorheological Finishing (MRF) of Hard Materials." In ASME 2009 International Manufacturing Science and Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/msec2009-84335.

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Анотація:

Magnetorheological finishing (MRF) process is one of the fine abrasive finishing processes used to get better surface finish on a semi finished part. The present work is aimed at investigating the effectiveness and validity of magnetorheological finishing process and finding out the process parameters (such as finishing time, rotational speed of carrier wheel, abrasive concentration, and working gap) and their effectiveness on surface finish characteristics. MRF process is applied on brass and nonmagnetic stainless steel workpieces which were initially finished by the grinding process. The results of experiments were statistically analyzed by response surface methodology (RSM) to form an empirical model for the responses generated during the process. Also, an attempt has been made to model and simulate the finishing operation in MRF process. Apart from this, the micro structure of the mixture of magnetic and abrasive particles in magnetorheological polishing fluid (MR Fluid) has been proposed. Thereafter the normal force on the abrasive particles is calculated from the applied magnetic field and a model for the prediction of surface roughness has also been presented. Finally, theoretical results calculated using the proposed model, have been compared with the experimental results to validate the model developed.

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Mulik, R. S., and P. M. Pandey. "Experimental Investigations Into the Finishing Force and Torque in Magnetic Abrasive Finishing Process." In ASME 2013 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2013. http://dx.doi.org/10.1115/imece2013-62365.

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Анотація:

Magnetic abrasive finishing (MAF) is a finishing process in which surface is finished by removing the material in the form of micro-chips by the magnetic and abrasive particles in the presence of a magnetic field. In a finishing process, forces have direct influence on the generation of finished surface and accuracy of the workpiece. The magnitude of force or torque is also of importance as the surface integrity is affected. In the present research work, new design of electromagnet which gave relatively lesser force and torque as compared to conventional annular electromagnet was used to perform MAF. The measurements of normal force and finishing torque were carried out at different processing conditions using Kistler’s dynamometer and were found in the order of 24 N and 8 Nm respectively. The experiments were planned using Taguchi’s L16 orthogonal array and supply voltage to electromagnet, rpm of electromagnet, finishing gap and abrasive weight percentage at four levels were considered as process parameters. Supply voltage to the electromagnet and finishing gap were found to be the significant factors affecting finishing force and torque in this work. The scanning electron microscopy (SEM) study of the finished workpiece showed that there was no surface or subsurface damage due to very low finishing force and torque.

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