MR fluid 폴리싱 공정에서의 요인분석법을 이용한 재료제거율 향상을 위한 공정 인자 도출에 관한 연구

초록

In these days, micro grinding and ELID(electronic in-process dressing) are used in producing special mirror made of brittle materials. However, micro crack, work hardening of residual stress could be created by high grinding energy in these process. MR fluid polishing is indirect grinding process and used by MR fluid that is changed in magnetic field. It can eliminate micro crack on the surface of material and minimize subsurface damage. In this paper, operating condition for material removal rate of MR fluid polishing is analyzed using factor analysis for aluminum alloy. In the experiments, the factor of experiments are wheel speed, polishing depth, magnetic field, polishing time and concentration of CI powder in MR fluid. From the result of ezperiments using factor analysis, material removal rate of MR fluid polishing depends on magnetic field, polishing depth, polishing time. On the other hand, wheel speed and concentration of CI powder cannot affect to material removal rate. Through these results, the electromagnet is new-designed and performed alaysis of magnetic flus density.