Artykuły w czasopismach: „Magnetic abrasive”

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

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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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Komanduri, R., N. Umehara i M. Raghunandan. "On the Possibility of Chemo-Mechanical Action in Magnetic Float Polishing of Silicon Nitride". Journal of Tribology 118, nr 4 (1.10.1996): 721–27. http://dx.doi.org/10.1115/1.2831600.

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Chromium oxide abrasive has been reported in the literature to provide efficient chemo-mechanical polishing action for silicon nitride ceramic. Since aluminum oxide and chromium oxide abrasives are nearly of the same hardness, magnetic float polishing tests were conducted on silicon nitride balls with these two abrasives to investigate mechanical versus chemo-mechanical aspects of polishing. Tests results show higher removal rates and smoother surface texture (with fewer pits) with chromium oxide abrasive compared to aluminum oxide abrasive. Formation of pits due to brittle fracture seems to be the more predominant mode of material removal with aluminum oxide abrasive than with chromium oxide abrasive. While there may be some mechanical action (abrasion) with chromium oxide abrasive initially, subsequent removal is believed to be due to chemo-mechanical action. This could be due to degeneration of the chromium oxide abrasive (both mechanical and chemical) during polishing. Various hypotheses for the material removal mechanism (both mechanical and chemo-mechanical) were considered. Based on that, the higher removal rates and smoother surface texture on the silicon nitride balls with chromium oxide abrasive in semifinish polishing is interpreted here as possibly due to chemo-mechanical action. Higher chemical stability of aluminum oxide abrasive (compared to chromium oxide abrasive) and the known role of chromium oxide as a catalyst for the oxidation of silicon nitride are some of the reasons attributed for this action.

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MASAKI, Koichi, Masahiro ANZAI i Takeo NAKAGAWA. "Magnetic abrasive finishing using PPM magnetic abrasives." Journal of the Japan Society for Precision Engineering 56, nr 5 (1990): 935–40. http://dx.doi.org/10.2493/jjspe.56.935.

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Li, Wen Hui, Hong Ling Chen, Sheng Qiang Yang i Shi Chun Yang. "Research of Magnetic Induction Intensity on Magnetic Abrasive Finishing". Key Engineering Materials 455 (grudzień 2010): 174–80. http://dx.doi.org/10.4028/www.scientific.net/kem.455.174.

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As a kind of precise surface finishing technology, magnetic abrasive finishing has wide application, low cost, high efficiency, good effects, and other advantages. Magnetic induction intensity is one main parameter affecting finishing effect and efficiency of magnetic abrasive finishing. Saturation magnetic induction intensity for different magnetic abrasives is defined through test device designed by ourselves. Affecting rules of saturation magnetic induction intensity is discussed by experiments, which provide basis for parameters selection and practical application of magnetic abrasive finishing.

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Singh, Palwinder, i Lakhvir Singh. "Experimental Examination on Finishing Characteristics of Aluminum Pipes in Magnetic Abrasive Machining Using SiC Contained Glued Magnetic Abrasives". Trends in Sciences 19, nr 19 (4.10.2022): 6182. http://dx.doi.org/10.48048/tis.2022.6182.

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With the rapid development in the industry, applications of finished parts are increasing day by day. However, the surface finish of the parts fabricated by conventional processes could not readily meet the requirements of various applications. Therefore, post-processing is needed to further improve the surface quality. Magnetic abrasive machining uses a flexible magnetic abrasive brush to remove material from the workpiece surface at a controllable rate. This cutting tool sticks to the workpiece during finishing operation and exerts a small force on the surface. In magnetic abrasive machining, the cutting tool neither requires compensation nor dressing. In this paper, the internal finishing of aluminum pipes has been investigated in magnetic abrasive machining tests using silicon carbide-based glued magnetic abrasives. For evaluating the performance of these magnetic abrasives, experimental work according to the central composite design technique was carried out to finish the aluminum pipes. The results so obtained were analyzed to study the influence of process parameters like magnetic field strength, speed of workpiece, abrasive mesh size and quantity of magnetic abrasives on percentage improvement in surface finish and material removal rate. The analysis showed that magnetic field strength was the most effective parameter while finishing the aluminum pipe followed by the quantity of magnetic abrasives. The finishing at optimal condition resulted in a surface finish of 0.07 μm. Further, scanning electron microscopy of the surface before and after magnetic abrasive machining was taken to study the improvement in surface finish. HIGHLIGHTS Magnetic abrasive machining (MAM) of aluminum work specimens have been performed by SiC-based magnetic abrasives The central composite design has been used for planning and execution of experiments The surface finish and material removal rate of the machined work specimens have been analysed as a performance measure of MAM process The high value of improvement in surface finish and material removal rate at optimum machining conditions have been observed Scanning electron microscopy (SEM) has been employed to study the surface topography of machined surfaces GRAPHICAL ABSTRACT

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Zhang, H., i W. D. Li. "Research on the Finishing Mechanism of Fluid Magnetic Abrasives". Key Engineering Materials 455 (grudzień 2010): 211–15. http://dx.doi.org/10.4028/www.scientific.net/kem.455.211.

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The fluid magnetic abrasive (FMA) is a new type of precision finishing abrasives. The workpiece can be finished by fluid magnetic abrasive (FMA) because of its rheological property. On base of researching on the micro-structure of fluid magnetic abrasive (FMA), this paper analyzed the finishing mechanism. And the experiments and results are presented as well in this paper.

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Yin, Cheng, Lida Heng, Jeong Kim, Min Kim i Sang Mun. "Development of a New Ecological Magnetic Abrasive Tool for Finishing Bio-Wire Material". Materials 12, nr 5 (1.03.2019): 714. http://dx.doi.org/10.3390/ma12050714.

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This study proposes a new wire magnetic abrasive finishing (WMAF) process for finishing 316L SUS wire using ecological magnetic abrasive tools. 316L SUS wire is a biomaterial that is generally used in medical applications (e.g., coronary stent, orthodontics, and implantation). In medical applications of this material, a smooth surface is commonly required. Therefore, a new WMAF process using ecological magnetic abrasive tools was developed to improve the surface quality and physical properties of this biomaterial. In this study, the WMAF process of 316L SUS wire is separated into two finishing processes: (i) WMAF with ecological magnetic abrasive tools, and (ii) WMAF with industrial magnetic abrasive tools. The ecological magnetic abrasive tools consist of cuttlefish bone abrasives, olive oil, electrolytic iron powder, and diamond abrasive paste. The finishing characteristics of the two types of abrasive tools were also explored for different input parameters (i.e., vibrating magnetic field and rotating magnetic field). The results show that ecological magnetic abrasive tools can improve the initial surface roughness of 316L SUS wire from 0.23 µm to 0.06 µm. It can be concluded that ecological magnetic abrasive tools can replace industrial magnetic abrasive tools.

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Ma, Fujian, Ziguang Wang, Yu Liu, Zhihua Sha i Shengfang Zhang. "Machining Performance for Ultrasonic-Assisted Magnetic Abrasive Finishing of a Titanium Alloy: A Comparison with Magnetic Abrasive Finishing". Machines 10, nr 10 (6.10.2022): 902. http://dx.doi.org/10.3390/machines10100902.

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Titanium alloys are widely used in aerospace, the military industry, electronics, automotive fields, etc., due to their excellent properties such as low density, high strength, high-temperature resistance, and corrosion resistance. Many components need to be finished precisely after being cut in these applications. In order to achieve high-quality and high-efficiency finishing of titanium alloys, ultrasonic-assisted magnetic abrasive finishing (UAMAF) was introduced in this research. The machining performance for UAMAF of a titanium alloy was studied by experimentally comparing UAMAF and magnetic abrasive finishing (MAF). The results show that the cutting force of UAMAF can reach 2 to 4 times that of MAF, and it decreases rapidly with the increase in the machining gap due to the energy loss of ultrasonic impact in the transmission between magnetic abrasives. The surface roughness of UAMAF can reach about Ra 0.075 μm, which is reduced by about 59% compared with MAF. The main wear type of the magnetic abrasive is that the diamond grits fell off the magnetic abrasive in both UAMAF and MAF. The uniform wear of the magnetic abrasive is realized, and the utilization ratio of the magnetic abrasive is obviously improved in UAMAF.

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Hu, Bin, i Ya Ping Lu. "Study on Preparation Technology and Finishing Performance of Magnetic Abrasive Grain". Advanced Materials Research 452-453 (styczeń 2012): 637–41. http://dx.doi.org/10.4028/www.scientific.net/amr.452-453.637.

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Due to the low efficiency of magnetic abrasive finishing and the difficulty in the making of magnetic abrasive grain, this article compares three different ways of its making, i.e. hot pressed sintering, spark plasma sintering (SPS) and ab-adhesive bonding sintering. SPS is found to have a higher cost, but it makes up the deficiency in magnetic abrasive grain made either by hot pressed sintering or by felt, with high abrasion resistance, processing efficiency and better processing performance.

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

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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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Fang, Jian Cheng, Wen Ji Xu, Zhi Yu Zhao i H. Y. Li. "Electrochemical Magnetic Abrasive Compound Finishing". Key Engineering Materials 291-292 (sierpień 2005): 275–80. http://dx.doi.org/10.4028/www.scientific.net/kem.291-292.275.

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In order to find a solution to the problem of inefficiency in magnetic abrasive finishing (MAF), electrochemical finishing (ECF) has been introduced to realize compound finishing. A new idea of integrating a magnetic pole with an electrode pole has been proposed as electrochemical magnetic abrasive finishing (ECMAF). At the same time, the occurrence of broken and dropped magnetic abrasives (MAs) has been discussed from the point of view of probability. Research on stock removal and surface roughness shows that the passive film has been removed continuously with a new substrate material emerging during the process of machining, which accelerates the process of electrochemistry to realize the surface finishing. The finishing efficiency and surface quality have been improved by the combination of MAF with the electrochemistry process, and the various cutting behaviors of MA in ECMAF.

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Gill, Jagdeep Singh, i Lakhvir Singh. "OPTIMIZATION OF MAGNETIC ABRASIVE FINISHING PROCESS OF SS304 STAINLESS STEEL". International Journal of Modern Manufacturing Technologies 14, nr 1 (20.06.2022): 55–63. http://dx.doi.org/10.54684/ijmmt.2022.14.1.55.

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With the advancement of the high-end industry, the demand for smooth surfaces has grown at an exorbitant rate. Magnetic abrasive finishing (MAF) is gaining wide attention these days as a popular finishing method to achieve smooth and high-quality surfaces. An alternative approach was used in the present work to produce a highly finished surface on stainless steel SS304 sheet using a magnetic abrasive finishing process. Response surface methodology (RSM) was applied to optimize the process parameters. Optimal results occur at a magnetic flux density (3100 Gauss), the rotational speed of the magnetic pole (250 rpm), grit size (250µm), and the percentage of abrasive particles (10%) for a percentage reduction in surface roughness (%∇Ra). Among the four factors, the grit size of the abrasives is the factor with the highest contribution (42.70%) and the rotation speed of the magnetic pole is the factor with the least contribution (0.79%) during the finishing process of the magnetic abrasive, which affects the percentage reduction in surface roughness (%∇Ra). To acquire a better understanding of the finishing mechanism, scanning electron microscope (SEM) images and surface profiles of the surface before and after magnetic abrasive finishing were also examined.

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Han, Guang Chao, Ming Sun i Jing Dong Li. "Experimental Research on the Robotic Compound Polishing Process with Mixed Magnetic Abrasive". Advanced Materials Research 129-131 (sierpień 2010): 118–23. http://dx.doi.org/10.4028/www.scientific.net/amr.129-131.118.

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The quality and the efficiency of the polishing process are important to the lead time of the rapid tooling. Robotic polishing process with free abrasive is adapted to the finishing of complex mould surface, in which the soft polishing tool is widely used. But the stability and the efficiency of the process should be improved further. According to the moving and grinding characters of the free abrasive, the mixed magnetic abrasive and the minitype electromagnetic field are combined to the robotic polishing process. The mixed magnetic abrasive are made up of magnetic grain and hard abrasive, which can enhance the effective cutting and grinding process of the three-body abrasion under the effect of magnetic field. The robotic compound polishing process with mixed magnetic abrasive is presented in this paper. The experiments are tested to study the distribution of the minitye magnetic field and the polishing efficiency of the complex polishing process. The results show that the polishing efficiency of the process can be improved obviously where the effective working intensity of the electromagnetic field reaches 400Gs.

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Chang, Geeng-Wei, Biing-Hwa Yan i Rong-Tzong Hsu. "Study on cylindrical magnetic abrasive finishing using unbonded magnetic abrasives". International Journal of Machine Tools and Manufacture 42, nr 5 (kwiecień 2002): 575–83. http://dx.doi.org/10.1016/s0890-6955(01)00153-5.

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Wang, A. Cheng, Lung Tsai i Yan Cherng Lin. "Study the Rheological Property of Gel Abrasives in Magnetic Abrasive Finishing". Applied Mechanics and Materials 479-480 (grudzień 2013): 86–90. http://dx.doi.org/10.4028/www.scientific.net/amm.479-480.86.

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Magnetic finishing with gel abrasive (MFGA) performs better than magnetic abrasive finishing (MAF) in terms of polishing efficiency. However, silicone gels are semi-solid polymer gels with deforming properties that are temperature dependent materials, ultimately degrading the polishing efficiency in MFGA significantly. Therefore, this study evaluated the MFGA mechanism to elucidate the properties of silicone gels in order to attain both the finished effect in MFGA and effective gel abrasives to produce a highly efficient polished surface. Cylindrical rods were polished using silicone gels with different plasticity to determine the temperature of abrasive media in the working area. Next, circulating effects of abrasive media were identified to ensure the efficiency in MFGA. Additionally, finding the relation between the concentrations of abrasive media and circulating effect in the working area. Experimental results showed that silicone gels with low plasticity produced high temperature of abrasive media in MFGA, and high temperature of abrasive medium made excellent circulating effect in the working area, inducing high material removal and fine surface roughness.

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Liu, Guangxin, Yugang Zhao, Zhihao Li, Chen Cao, Jianbing Meng, Hanlin Yu i Haiyun Zhang. "Investigation of MAF for Finishing the Inner Wall of Super-Slim Cardiovascular Stents Tube". Materials 16, nr 8 (11.04.2023): 3022. http://dx.doi.org/10.3390/ma16083022.

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The internal wall of cardiovascular stent tubing produced by a drawing process has defects such as pits and bumps, making the surface rough and unusable. In this research, the challenge of finishing the inner wall of a super-slim cardiovascular stent tube was solved by magnetic abrasive finishing. Firstly, a spherical CBN magnetic abrasive was prepared by a new method, plasma molten metal powders bonding with hard abrasives; then, a magnetic abrasive finishing device was developed to remove the defect layer from the inner wall of ultrafine long cardiovascular stent tubing; finally, response surface tests were performed and parameters were optimized. The results show that the prepared spherical CBN magnetic abrasive has a perfect spherical appearance; the sharp cutting edges cover the surface layer of the iron matrix; the developed magnetic abrasive finishing device for a ultrafine long cardiovascular stent tube meets the processing requirements; the process parameters are optimized by the established regression model; and the inner wall roughness (Ra) of the nickel–titanium alloy cardiovascular stents tube is reduced from 0.356 μm to 0.083 μm, with an error of 4.3% from the predicted value. Magnetic abrasive finishing effectively removed the inner wall defect layer and reduced the roughness, and this solution provides a reference for polishing the inner wall of ultrafine long tubes.

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Hanada, Kotaro, i Hitomi Yamaguchi. "Development of Spherical Iron-Based Composite Powder with Carried Alumina Abrasive Grains by Plasma Spray". Advanced Materials Research 75 (czerwiec 2009): 43–46. http://dx.doi.org/10.4028/www.scientific.net/amr.75.43.

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This paper describes the development of spherical iron-based composite powder with carried alumina abrasive grains made by a plasma spray technique. Carbonyl iron powder (7.2 μm average size) and alumina abrasive grains (0.3 μm average size) are sprayed into the plasma flame from the respective nozzles simultaneously, or their mechanical mixture is directly plasma-sprayed. In case of the composite powder obtained by the direct spray method, the alumina abrasives are well carried on the carbonyl iron particles. However, a plasma current of more than 100 A causes melting and vaporizing of the alumina abrasives;, consequently the carbonyl iron and alumina abrasives are separated. The magnetic abrasive experiments with the composite powder developed are made for SUS304 stainless steel plate, and the result shows that the developed composite powder has high potential abrasive performance.

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Chai, Jing Fu, Qiu Sheng Yan, Ling Ye Kong i Min Li. "Research on the Constraint Mechanism of Abrasive Particle of MR Effect-Based Tiny-Grinding Wheel". Advanced Materials Research 135 (październik 2010): 46–51. http://dx.doi.org/10.4028/www.scientific.net/amr.135.46.

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To improve the effect of magnetorheological finishing (MRF), it is necessary to control the behavior of abrasive particle effectively in machining process. This article described the machining principle of semi-bond abrasives under the MR effect, then, analyzed the magnetic field of the polishing tool. Based on the magnetic field theory, the constrained model of abrasive particle was established, consequently, the force and the machining behavior of abrasive particle were analyzed. And an experiment was carried out to analyze the effect of the abrasive behavior on the material removal. The results show that the experimental results are identical with the theoretical analysis. Therefore, the control of the particle behavior in process is proved to be available.

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Samra, Partap Singh, i Lakhvir Singh. "Analyzing Effect of Interactions of Process Parameters on Surface Finish of SUS304 Steel Roller Using RSM Technique". Asian Journal of Engineering and Applied Technology 1, nr 2 (5.11.2012): 31–35. http://dx.doi.org/10.51983/ajeat-2012.1.2.2492.

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Finishing of cylindrical workpieces of SUS304 steel has been done using loosely bonded diamond based magnetic abrasives prepared by homogeneous mixing of magnetic powder (Fe powder of 300 mesh size (51.4μm)), abrasive powder (Diamond particles of 200 mesh size (41μm)), and lubricant. A central composite design involving four variables has been employed using RSM techniques to establish a mathematical model between parameters and response (percent improvement in surface finish), a series of experiments have been conducted using in-house fabricated setup. It has been found that magnetic flux density, quantity of magnetic abrasives, rotational speed of workpiece and percentage of abrasives in magnetic abrasives has significant effect on PISF. The maximum percentage improvement in surface finish was found to be 81% (0.04 μm Ra) at 1.0 Tesla of magnetic flux density, 40 mg of magnetic abrasives, 800 rpm as rotational speed of workpiece and 40% of abrasive. Scanning Electron Microscope (SEM) photographs shows that the surface generated by turning on lathe consists of deep scratches. The peaks have been sheared off to much smaller heights by MAF resulting in improved surface finish, but fine scratching marks produced by MAF appear on the surface.

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Singh, Palwinder, Lakhvir Singh i Sehijpal Singh. "Finishing of Tubes using Bonded Magnetic Abrasive Powder in an Abrasive Medium". Powder Metallurgy Progress 20, nr 1 (1.06.2020): 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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Kim, Sang Oh, i Jae Seob Kwak. "Planarization of 2 ̋ Sapphire Wafer Using Magnetic Abrasive Polishing Process". Advanced Materials Research 741 (sierpień 2013): 33–38. http://dx.doi.org/10.4028/www.scientific.net/amr.741.33.

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In this study, the process of magnetic abrasive polishing (MAP), installed permanent magnet to improved magnetic force on surface of wafer, was used for planarization of sapphire wafer. The surface roughness and polished area were investigated according to polishing time. The results showed that the improving strategy of magnetic force was helpful to improvethe roughness of sapphire and the polished area was gradually increased according to polishing time since the frictional heat between magnetic abrasives and wafer surface caused the improvement of fluidity for magnetic abrasive. In addition to, for using medium based on oil, the better improvement of surface roughness was achieved comparing to silicone gel medium of high viscosity.

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

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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 i Xu Zhang. "Study on Preparation Process of Magnetic Abrasive Particles". Materials Science Forum 750 (marzec 2013): 7–10. http://dx.doi.org/10.4028/www.scientific.net/msf.750.7.

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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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Tanaka, Hideaki, H. Horita, Takehisa Yoshikawa, K. Iwatsuka i Yukio Maeda. "Advanced Diamond Charging Process Using Vibrating Charging Ring in Fixed Abrasive Lapping". Advanced Materials Research 325 (sierpień 2011): 502–7. http://dx.doi.org/10.4028/www.scientific.net/amr.325.502.

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In the lapping of magnetic heads and other electronic components composed of multiple materials, differences in the processing characteristics of the composite materials produce residual steps on the surface at composite interfaces. Residual step heights have been reduced to as small as a few nanometers. We investigated using fine abrasives in fixed abrasive lapping to further reduce the residual step height. This requires highly secure, high-density embedding of abrasives on the lapping plate. To this end, we evaluated the surface morphology of the lapping plate after diamond abrasive charging and investigated the embedding mechanism of diamond abrasive charging. The results obtained will assist in determining the direction of future research and development. A prototype charging ring that uses a vibrating system was developed to increase the density of abrasives embedded on the lapping plate. This diamond charging using a vibrating system was able to increase the embedded abrasive density and improve the flatness of the charging plate.

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Dhull, Sachin, i R. S. Walia. "Study of magnetic assisted-AFM, mechanical properties of various abrasive laden polymer media and abrasive wear and force mechanism". International Journal of Advance Research and Innovation 4, nr 1 (2016): 230–38. http://dx.doi.org/10.51976/ijari.411633.

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Abrasive flow machining (AFM), also known as extrude honing, is a method of smoothing and polishing internal surfaces and producing controlled radii. A one-way or two-way flow of an abrasive media is extruded through a work piece, smoothing and finishing rough surfaces. In one-way systems, we flow the media through the work piece, then it exits from the part. In two-way flow, two vertically opposed cylinders flow the abrasive media back and forth. In the paper, the various types of abrasive laden polymer media, their work piece applications as well as the compatibility with the abrasives used is explained. The properties of the polymer used in AFM are compared and the best combination of polymer, abrasive and hydrocarbon oil is selected. Apart from polymer properties, the media flow equations, abrasive wear and forces is also studied.

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Luo, Zhong Ping, i Ya Lin Yao. "A Study on the Methods for Precise Sorting of Synthetic Diamond Abrasives". Key Engineering Materials 304-305 (luty 2006): 66–70. http://dx.doi.org/10.4028/www.scientific.net/kem.304-305.66.

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In an abrasive tool the abrasive is the main part undertaking grinding work, thus, the grinding effects mainly depend on the types and properties of the abrasive. The strength and fracture property of the abrasive grain in a synthetic diamond abrasive tool have a direct influence on the operational performance of the tool. Generally, it is expected that the strength and protrusion height of the grain are as same as possible. The strength and fragmenting property of the abrasive grain hinge on its crystal shape and regularity and completeness, internal vice, impurity content and impurity distribution pattern. The abrasive grains must be sorted and classified to make their grain sizes and their properties consistent with each and all. In this paper, the author discusses the basic properties and related performances of synthetic diamond abrasives. Elementary discussion is made separately on improving the vibration sorting, introducing the magnetic separation, applying the heavy liquid separation, exploring the floatation technology and using the selective fragmentation principle. In addition, here are presented the basic methods for precise sorting of synthetic diamond abrasives and their general principles. Practices have proved these methods effective and feasible.

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Bansal, Ankit, Ravi Butola, M. S. Niranjan, Qasim Murtaza i Umang Soni. "Synthesis and Characterization of Sintered Magnetic Abrasives Used in Advance Finishing Processes Through Powder Metallurgy Route". INTERNATIONAL JOURNAL OF ADVANCED PRODUCTION AND INDUSTRIAL ENGINEERING 5, nr 3 (5.07.2020): 27–33. http://dx.doi.org/10.35121/ijapie202007345.

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The magnetic field-assisted surface finishing process needs a sintered magnetic abrasive powder which could be a mixture of SiC and CIP particles. Tube furnaces have been used to develop SiC-based sintered magnetic abrasives. The focus of this article is to investigate the anticipated results and to carry out the fabrication setup of sintered magnetic abrasive for the super-finishing of composite materials and their coating. The article depicts a significant effect on the mechanical properties such as microhardness and compressive strength and analyzes SiC and CIP composite-based microstructure. The synthesis of the powder involves four major processes like blending; compaction and sintering. Characterization of sintered magnetic abrasives has been done using SEM, EDS, XRD to study morphology, chemical composition, crystallography, and magnetic properties. The results have been compared with the un-bonded magnetic abrasives. This paper also presents a brief literature review of the state-of-the-art technology of high-performance surface finishing processes used in manufacturing industries. Finally, the downside and stray aspects of the related literature are spotlighted and a list of prospective issues for future research directions is recommended.

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Poudel, Bibek, Hoa Nguyen, Guangchao Song, Patrick Kwon i Haseung Chung. "Novel Process Modeling of Magnetic-Field Assisted Finishing (MAF) with Rheological Properties". Lubricants 11, nr 6 (27.05.2023): 239. http://dx.doi.org/10.3390/lubricants11060239.

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The performance of a magnetic-field-assisted finishing (MAF) process, an advanced surface finishing process, is severely affected by the rheological properties of an MAF brush. The yield stress and viscosity of the MAF brush, comprising iron particles and abrasives mixed in a liquid carrier medium, change depending on the brush’s constituents and the applied magnetic field, which in turn affect the material removal mechanism and the corresponding final surface roughness after the MAF. A series of experiments was conducted to delineate the effect of MAF processing conditions on the yield stress of the MAF brush. The experimental data were fitted into commonly used rheology models. The Herschel–Bulkley (HB) model was found to be the most suitable fit (lowest sum of square errors (SSE)) for the shear stress–shear rate data obtained from the rheology tests and used to calculate the yield stress of the MAF brush. Processing parameters, such as magnetic flux density, weight ratio of iron and abrasives, and abrasive (black ceramic in this study) size, with p-values of 0.031, 0.001 and 0.037, respectively, (each of them lower than the significance level of 0.05), were all found to be statistically significant parameters that affected the yield stress of the MAF brush. Yield stress increased with magnetic flux density and the weight ratio of iron to abrasives in MAF brush and decreased with abrasive size. A new process model, a rheology-integrated model (RM), was formulated using the yield stress data from HB model to determine the indentation depth of individual abrasives in the workpiece during the MAF process. The calculated indentation depth enabled us to predict the material removal rate (MRR) and the instantaneous surface roughness. The predicted MRR and surface roughness from the RM model were found to be a better fit with the experimental data than the pre-existing contact mechanics model (CMM) and wear model (WM) with a R2 of 0.91 for RM as compared to 0.76 and 0.78 for CMM and WM. Finally, the RM, under parametric variations, showed that MRR increases and roughness decreases as magnetic flux density, rotational speed, weight ratio of iron to abrasive particles in MAF brush, and initial roughness increase, and abrasive size decreases.

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Singh, Palwinder, Lakhvir Singh i Arishu Kaushik. "Parametric Optimization of Magnetic Abrasive Finishing Using Adhesive Magnetic Abrasive Particles". International Journal of Surface Engineering and Interdisciplinary Materials Science 7, nr 2 (lipiec 2019): 34–47. http://dx.doi.org/10.4018/ijseims.2019070103.

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A very precise surface finish is desirable in manufacturing semiconductors, medical equipment, and aerospace parts. The examinations on magnetic abrasive finishing (MAF) processes are being done for the modern industry. This newly developed process is serving the industry to achieve the desired level of precision and surface finish. This research represents the MAF of aluminum pipes using adhesive magnetic abrasive particles. The different process parameters were optimized using the Response Surface Methodology (RSM) method to gain an in-depth analysis of surface roughness in terms of roughness improvement rate (RIR), and material removal rate (MRR). The achieved maximum RIR and MRR was 81.49% and 2.74mg/min, respectively. The finished workpieces were microscopically investigated by scanning electron microscopy (SEM) to further study the mechanism of MAF process.

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Yao, Xin Gai, Yan Hong Ding, Gang Ya, Wei Wei Liu i Yuan Zhang. "Study of Finishing Mechanism for Internal Surface Using Magnetic Force Generated by Rotating Magnetic Field". Key Engineering Materials 416 (wrzesień 2009): 406–10. http://dx.doi.org/10.4028/www.scientific.net/kem.416.406.

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In the paper, a new method of using rotating magnetic field generated by a stator of alternative electromotor to finish the inner surface of tube-type workpiece is proposed. Force and movements of magnetic abrasive are analyzed. The finishing mechanism is analyzed and the sliding, friction and scratching between magnetic abrasives and the workpiece inner surface may be main factors of material removal as the non-mechanical relative motion is produced.

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Bobde, Prof Saurabh A., Prof Satish G. Sonwane i Prof Harshyu A. Bhimgade. "Magnetic Abrasive Flow Machine Based Super Surface Finishing". International Journal of Trend in Scientific Research and Development Volume-3, Issue-3 (30.04.2019): 350–52. http://dx.doi.org/10.31142/ijtsrd21733.

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Zhao, Xuefeng, Hao Qin, Yong Yang, Ke You, Xiaolong Yin i 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, nr 6 (grudzień 2021): 1304–11. http://dx.doi.org/10.1051/jnwpu/20213961304.

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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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33

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

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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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Cheng, Ken-Chuan, Kuan-Yu Chen, Hai-Ping Tsui i A.-Cheng Wang. "Characteristics of the Polishing Effects for the Stainless Tubes in Magnetic Finishing with Gel Abrasive". Processes 9, nr 9 (1.09.2021): 1561. http://dx.doi.org/10.3390/pr9091561.

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Magnetic abrasive finishing (MAF) is a fast, high efficiency and high-precision polishing method on the surface machining of the metals. Furthermore, MAF also can be utilized to polish the stainless tubes in industrial applications; however, stainless tubes are often a non-magnetic material that makes it difficult for the magnetic field line to penetrate into the stainless tubes, thus reducing the magnetic forces in the inner tubes polishing. That is why stainless tubes are not easy to finish using traditional MAF. Therefore, magnetic finishing with gel abrasive (MFGA) applies gels mixed with steel grit and abrasives that were developed to improve the polishing efficiency and surface uniformity of the steel elements. In this study, a guar gum or silicone gel mixed with steel grit and silicon carbides are used as the magnetic abrasive gel to polish the stainless inner tubes. A DC motor was used to control the rotation speed of the chuck and an AC induction motor connected with an eccentric cam to produce the reciprocating motion of the workpiece were utilized to finish the inner surface of stainless tubes in the polishing process. The parameters of abrasive concentration, abrasive particle sizes, rotation speeds of motor and electric currents were used to investigate the surface roughness and the removal of materials from the stainless tubes. The experimental results showed that since guar gum had better fluidity than the silicone gel did, guar gum created excellent polishing efficiency in MFGA. Furthermore, the surface roughness of the stainless tube decreased from 0.646 μm Ra to below 0.056 μm Ra after processing for 30 min with the parameters of current 3A, gel abrasive with guar gum, rotational speed 1300 rpm and vibration frequency 4 Hz.

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Tanaka, Hideaki, Hiromu Chiba, Takehisa Yoshikawa, K. Iwatsuka i Yukio Maeda. "Mechanical Characterization of Lapping Plate Materials in Diamond Charging Process". Advanced Materials Research 126-128 (sierpień 2010): 17–22. http://dx.doi.org/10.4028/www.scientific.net/amr.126-128.17.

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In the lapping of magnetic heads and other electronic components composed of multiple materials, differences in the processing characteristics of the composite materials result in “residual steps” forming on the surface at composite interfaces. Residual step heights have been reduced to as little as a few nanometers. We investigated using fine abrasives in fixed abrasive lapping for this purpose, which requires highly secure, high-density embedding of the abrasives on the lapping plate. To this end, we modeled the abrasive embedding process and investigated the relationship between the mechanical properties of the lapping plate and the retention of the abrasive, to determine the direction of further research and development. The results of this investigation revealed a correlation between the work hardening in the plate and the resulting abrasive density and cutting edge height. The investigation also showed that it is possible to suppress the reduction in lapping rate that occurs during use by increasing the work hardening coefficient of the plate.

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36

Nikiforov, Igor. "Magnetic-abrasive polishing capabilities". E3S Web of Conferences 402 (2023): 11021. http://dx.doi.org/10.1051/e3sconf/202340211021.

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Finishing is a basic requirement for obtaining the required surface quality in the production of various components used in many industries. A relatively new finishing process, called magnetic abrasive finishing, is used for the finishing of complex shaped surfaces. This article presents the latest developments in magnetic abrasive polishing and describes the results obtained by various research scientists based on their experiments in the field of magnetic abrasive polishing.

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Yan, Biing-Hwa, Geeng-Wei Chang, Tsung-Jen Cheng i Rong-Tzong Hsu. "Electrolytic magnetic abrasive finishing". International Journal of Machine Tools and Manufacture 43, nr 13 (październik 2003): 1355–66. http://dx.doi.org/10.1016/s0890-6955(03)00151-2.

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Ding, Y. H., Xin Gai Yao, G. Ya i P. Lu. "Investigation of a New Kind of Magnetic Abrasive Grains Used for Finishing Inner-Hole Surface". Key Engineering Materials 487 (lipiec 2011): 289–92. http://dx.doi.org/10.4028/www.scientific.net/kem.487.289.

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Magnetic abrasive grain is a kind of tool for magnetic abrasive finishing (MAF). The lifetime of the grains is the choke point which restricts its finishing efficiency and the surface quality processed by MAF .Therefore, a kind of magnetic abrasive grains based on Cr and Ni elements is investigated. The interrelated experimental results show: the new magnetic abrasive grains is a practical finishing tool with longer lifetime, higher finishing efficiency, better abrasive resistance compared with traditional magnetic abrasive grains. It supplies a power for promoting the development of MAF.

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39

Zhang, Guixiang, Yugang Zhao, Dongbiao Zhao, Dunwen Zuo i Fengshi Yin. "New iron-based SiC spherical composite magnetic abrasive for magnetic abrasive finishing". Chinese Journal of Mechanical Engineering 26, nr 2 (marzec 2013): 377–83. http://dx.doi.org/10.3901/cjme.2013.02.377.

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Yin, Shao Hui, Yu Wang, Han Huang, Yong Jian Zhu, Yu Feng Fan i Yue Chen. "Effects of Horizontal Vibration Assistance on Surface Roughness in Magnetic Abrasive Finishing". Advanced Materials Research 76-78 (czerwiec 2009): 246–51. http://dx.doi.org/10.4028/www.scientific.net/amr.76-78.246.

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This paper investigates the effect of horizontal vibration assistance on surface roughness in magnetic abrasive finishing, and the material removal mechanism associated. The experiments on vibration-assisted finishing have clearly indicated that the improvement of surface roughness is mainly attributed to the cross-cutting effect of abrasives.

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41

Naveen, K., Vignesh V. Shanbhag, N. Balashanmugam i Prakash Vinod. "Investigation of magnetic abrasive finishing using unbonded magnetic abrasives with double pole arrangement". International Journal of Manufacturing Technology and Management 31, nr 4 (2017): 314. http://dx.doi.org/10.1504/ijmtm.2017.086119.

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Naveen, K., N. Balashanmugam, Vignesh V. Shanbhag i Prakash Vinod. "Investigation of magnetic abrasive finishing using unbonded magnetic abrasives with double pole arrangement". International Journal of Manufacturing Technology and Management 31, nr 4 (2017): 314. http://dx.doi.org/10.1504/ijmtm.2017.10007086.

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Saito, T., K. Koike, H. Yamato, A. Kuwana, A. Suzuki, H. Yamaguchi i Takeo Shinmura. "Development of Gas-Atomized Magnetic Tools". Key Engineering Materials 291-292 (sierpień 2005): 287–90. http://dx.doi.org/10.4028/www.scientific.net/kem.291-292.287.

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The deficiency in the variety of available magnetic abrasive results in a narrow range of finishing performance. To break through this difficulty, this research developed iron-based gas-atomized magnetic tools. The magnetic tool has a spherical shape and micro-crevices on the surface. The micro-crevices perform the role of cutting instead of the edges of the existing magnetic abrasive, thereby achieving abrasive-less finishing. This paper studies the finishing performance of the developed magnetic tool. Compared to the existing magnetic abrasive, this magnetic tool shows more efficient finishing performance in the internal finishing of SUS304 stainless steel tubes used for sanitary piping systems.

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Chen, H. L., Shi Chun Yang, Jian Mei Wang, Wen Hui Li i G. Y. Xiong. "Internal Magnetic Abrasive Particles Surface Finishing Based on Permanent Magnetic Field". Advanced Materials Research 53-54 (lipiec 2008): 65–68. http://dx.doi.org/10.4028/www.scientific.net/amr.53-54.65.

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To internal magnetic abrasive particles surface finishing, the motion of magnetic abrasive particles was influenced not only by the intensity of magnetic induction, but also by the internal diameter, and the magnetic inductive capacity was also an important factor that influences finishing quality. In this paper, under the same experimental conditions, electromagnetic field and permanent magnetic field were respectively used to magnetic abrasive particles surface finishing on thin stainless steel bush and 45 steel bush, new thoughts on inserted permanent magnetic pole and butted permanent magnetic pole were pointed out. The finishing quality of two kinds of work pieces under three different magnetic poles was compared. The results have shown that permanent magnetic pole could decrease the surface roughness Ra of work piece from 1.6μm to 0.2μm, which could solve the puzzles encountered in internal magnetic abrasive particles surface finishing on magnetic inductive work piece and had good promising application value.

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Boytsov, A. G., S. V. Kurilovich, V. V. Kuritsyna i M. V. Siluyanova. "Determining a rational scheme of machining of gas turbine engine essential parts in magnetorheological environments by the method of expert assessment". VESTNIK of Samara University. Aerospace and Mechanical Engineering 18, nr 3 (31.10.2019): 38–47. http://dx.doi.org/10.18287/2541-7533-2019-18-3-38-47.

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The paper examines the basic schemes, features and advantages of magnetic abrasive machining. In this work we provide information on working environments for magnetic abrasive machining, compositions of ferro-abrasive powders and roughness of the surfaces achieved by their application; the process of forming the working layer is also analyzed. A classification of magnetic abrasive machining schemes according to the type of the magnetic inductor used, as well as their advantages and disadvantages are discussed. It is shown that the basic scheme of magnetic abrasive machining, the kind and dispersion of the abrasive medium, are assigned depending on the specific machining conditions and the requirements for the surface layer condition, whereas the choice of the type of the magnetic inductor is not so obvious, since each of the types has its advantages and disadvantages. An expert assessment procedure in choosing an acceptable magnetic-inductor scheme from a number of alternatives for use in magnetic abrasive machining is presented. The method of expert assessment was tested drawing on the example of the work of a group of experts formed by representatives of science and industry. It is shown that the direct-current electromagnetic inductor scheme is a rational scheme of magnetic abrasive machining according to the type of inductor used. This is due to the simplicity of process control and the expansion of technological capabilities, applicability for a wide range of problems solved by magnetic abrasive machining. Permanent-magnet magnetic abrasive schemes can be considered as an alternative to permanent-magnet ones.

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Li, Xiu Hong, Wen Hui Li i Sheng Qiang Yang. "Preparation Technology and Surface Finishing Characteristics Research of New Magnetic Abrasive Tools". Key Engineering Materials 522 (sierpień 2012): 21–25. http://dx.doi.org/10.4028/www.scientific.net/kem.522.21.

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According to the fact that the common machining medium used in magnetic abrasive finishing (magnetic abrasive) possessed disadvantages such as high preparation cost, easier to disperse in finishing process, and low utilization and repeat -utilization, this paper puts forward spherical magnetic abrasive of a certain size as magnetic abrasive machining medium, discusses the preparation techniques, establishes the mathematical model of finishing, and analyses the main performance parameter influencing finishing quality and finishing efficiency. Compared with magnetic grinding, spherical magnetic abrasive is not easy to disperse, can be re-used, having long service life and high finishing efficiency and quality. It is a magnetic finishing medium hasing development research value.

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Zhao, Zeng Dian, Yu Hong Huang i Yu Gang Zhao. "Preparation of Magnetic Abrasive by Sintering Method". Advanced Materials Research 135 (październik 2010): 382–87. http://dx.doi.org/10.4028/www.scientific.net/amr.135.382.

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In this paper, ferrosilicon powder was used as the ferromagnetic phase, corundum powder as the abrasive phase, high temperature inorganic binder as the adhesive, and after the ferrosilicon powder was modified, a series of magnetic abrasive was obtained by sintering method. Scanning electron microscope (SEM) and Energy dispersive spectrometer (EDS) were respectively used to characterize the morphology and elemental composition of magnetic abrasive. and through experiments carried out on the magnetic abrasive grinding performance testing and durability analysis. The experimental results showed that the magnetic abrasive prepared had good polishing ability and longer using time, and the surface roughness of the grinding sample can reach 0.12μm and the using time is up to 25 min.

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Kang, Gui Wen, i Fei Hu Zhang. "Research on Material Removal Mechanism of Magnetorheological Finishing". Materials Science Forum 532-533 (grudzień 2006): 133–36. http://dx.doi.org/10.4028/www.scientific.net/msf.532-533.133.

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Magnetorheological finishing (MRF) is a novel precision optical machining technology. MRF utilizes magnetic particles, nonmagnetic polishing abrasives in carrier fluid, and a magnetic field to finish optical materials. Owing to its flexible finishing process, MRF eliminates subsurface damage, corrects surface figure errors and the finishing process can be easily controlled by computer. To achieve deterministic finishing, it’s necessary to know the mechanism of material removal. Different magnetorheological fluids are used to finish optical glass on the same machining condition. The material removal and surface quality are examined after finishing with no polishing abrasive, aluminium oxide and cerium oxide. The results show that the hardness of polishing abrasive is not the main factors to affect material removal.

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Zou, Yan Hua, i Takeo Shinmura. "Development of a New Ultra-Precision Magnetic Abrasive Finishing Process". Key Engineering Materials 523-524 (listopad 2012): 256–61. http://dx.doi.org/10.4028/www.scientific.net/kem.523-524.256.

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To obtain an ultra-precision surface, this research developed a new type of magnetic finishing tool, “Ultra-precision Magnetic Abrasive Slurry”, for a magnetic field assisted internal finishing process. This ultra-precision magnetic abrasive slurry is made to mix simply the super-minute abrasive grains, super-minute globular iron particles, and oily grinding liquid. When the internal finishing was executed, the automatic mixing phenomenon of the Ultra-precision Magnetic Abrasive Slurry is caused, at the same time, super-minute abrasive grains and minute iron particles were uniformly distributed to the magnetic abrasive slurry. It was confirmed that a smooth mirror internal finishing for a SUS304 stainless steel tube is able to be achieved, by using the Ultra-precision Magnetic Abrasive Slurry that consists of the globular carbonyl iron particles (6μm in mean diameter) and diamond grains (0.25~0.75μm in mean diameter) and the oily grinding liquid. In this study, we examined the influence that the rotational speed of the magnetic pole exerted on the finishing characteristic. The results showed that the ultra-precision surface is successfully made, and the surface roughness has been improved from 320nm Ra to 3.37nm Ra .

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Yu, Juan, Qiu Sheng Yan, Jia Bin Lu i 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 (grudzień 2007): 914–19. http://dx.doi.org/10.4028/www.scientific.net/kem.364-366.914.

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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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