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Recently, the magnetorheological polishing (MRP) process using MR fluids has been focused as a new ultra-precision polishing technology for micro and optical parts such as aspheric lenses, etc. This method uses magnetorheological fluids (MR fluids) as a polishing media which contains required micro abrasives. The MR fluids consist of DI water based carbonyl iron (CI), nonmagnetic polishing abrasives, and necessary stabilizers. The MR fluids can produce a high stress and pressure on the workpiece surface based on Bingham lubrication theory and Preston equation. In the MRP process, the surface roughness and material removal rate (MRR) of a workpiece are affected by the process parameters, such as the properties of used nonmagnetic abrasives (particle material, size, aspect ratio and density, etc..), rotating wheel speed, imposed magnetic flux density and machining depth, etc. The objectives of this research is investigate the surface roughness obtained from the magnetorheological polishing process. Therefore, in order to optimize polishing conditions, a study on the characteristics of MR polishing is proposed in this paper using a surface roughness. This consists of optimizing polishing parameters of M process by the Taguchi method. Taking into account surface roughness, such three polishing parameters as wheel speed, feed rates and current value are optimized by using Taguchi method. For experimental works, an orthogonal array L27(313) is used based on DOE(Design of Experiments) and ANOVA(Analysis of Variance) is carried out. Finally, it is possible to recognize that the sequence of the factors affecting surface roughness corresponds to feed rate, current and wheel speed and to determine a combination of optimal polishing conditions. Especially, it can be declared that the feedrate is an important factor for surface roughness.

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ABSTRACT
1. 서론
2. 자기유변유체
3. 실험계획법을 이용한 표면 거칠기의 최적화
4. 분석 결과
5. 분석 결과
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UCI(KEPA) : I410-ECN-0101-2009-581-019508362