Study on Surface Integrity of Mn-Zn Ferrite in Ultraprecision Machining

Abstract

This paper primarily analyzed the mechanism of crack propagation in brittle materials micro-grinding, and obtained the empirical formula of the maximum unreformed thickness. Using the grinding rods with diameters of 0.7mm and 1.0mm, the single-factor experiments were carried out, through changing spindle speed, feed speed and depth of cut. We selected different processing parameters to study the general rules that the processing parameters affect the surface quality. The results show that the grinding depth has the most obvious influence on the surface quality, and the surface quality is the best when the grinding depth is 5 μm. The feed speed affects the surface quality secondarily, and the better surface quality can be obtained at 50 mm/min. The effect of spindle speed on surface quality is not obvious, but with the increase of spindle speed, the surface quality first increases and then decreases. We compare the different processing methods in order to study the effect of different processing methods on the surface quality. It can be concluded that in the case of smaller depth of cut, micro- grinding is easier to obtain high-quality machined surface than micro-milling