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为提高铁氧体磁头的性能和降低热压Mn-Zn铁氧体材料的磨削废品,本文对这种材料极易产生磨削缺陷的机理,进行了定性的理论分析,指出切削应力、热应力及相变应力是使它极易产生磨削缺陷的三大因素。用散热性优良的大气孔结构的绿色碳化硅砂轮,进行开槽磨削的对比研究表明:产生磨削缺陷的主要破坏因素是热应力及相交压力。因此,加工这种材料的要点是降低磨削热。同时又指出,用大气孔砂轮加工虽可获得无宏观缺陷的产品,但不能完全消除微观的加工变质层。所以,机械加工法对铁氧体材料并不是最理想的方法。建议研究一种无加工变质层的、与化学机械研磨法相类似的化学机械磨削法,以使磁头的性能不再受机械加工因素的影响。
In order to improve the performance of the ferrite head and reduce the grinding waste of the hot-pressed Mn-Zn ferrite material, the mechanism of the grinding defect of the material is easily produced in this paper, and the theoretical analysis is conducted qualitatively. The cutting stress, heat Stress and phase transformation stress is the three major factors that make it easy to produce grinding defects. The comparative study of slotted grinding with green silicon carbide grinding wheel with excellent heat dissipation structure shows that the main failure factors of grinding defects are thermal stress and intersecting pressure. Therefore, the point of processing this material is to reduce grinding heat. At the same time, it is pointed out that although the products with macroscopic defects can be obtained by processing with the air hole grinding wheel, the microscopic processing metamorphic layer can not be completely eliminated. Therefore, the mechanical processing of ferrite materials is not the best way. It is suggested to study a chemical-mechanical grinding method similar to the chemical mechanical polishing method without any processing deterioration layer so that the performance of the magnetic head will not be affected by mechanical processing factors.