难加工材料的珩磨加工技术研究

Research of honing technology for difficult-to-machine materials

本文着重针对钛合金、高温合金以及不锈钢这三种典型的难加工材料,在深孔珩磨加工中所出现的问题进行了分析,并针对这几种材料在珩磨油石磨料类型的选取、提高珩磨效率以及选择合理的珩磨工艺措施等方面进行了试验及分析研究。研究结果表明:对于钛合金材料,采用GC(70%)和SA(30%)的混合磨料油石,磨削效率较高,油石黏附较少,并且不易破碎,具有良好的磨削效果;对于奥氏体不锈钢(1Cr18Ni9Ti),选用WA(90%)和GC(10%)的混合磨料油石,既能提高磨削比,又能减小油石的黏附现象;对于高温合金,可采用混合磨料油石(GC 70%、SA30%)进行粗珩加工,以提高珩磨效率,而采用立方氮化鹏(cBN)油石可以取得较好的珩磨加工质量。

Based on three kinds of typical difficult-to-machine materials（titanium alloy,high temperature alloys,and stainless steel）,some problems with the deep hole honing were analyzed.Experiments and tests were made for the purpose of selecting suitable honing abrasives,improving honing efficiency and choosing the right honing process.The results show that when grinding the titanium alloy materials,composite oilstone with（70%）GC abrasive and（30%）SA abrasive is suggested,such composite oilstone will lead to higher honing efficiency,less adhesion and no breakage.For grinding austenite stainless steel 1Cr18Ni9Ti,the grinding ratio of oilstone will be improved and its adhesion reduced when adopting the composite oilstones with（90%）WA abrasive and（10%） GC abrasive.For grinding high temperature alloys,the composite oilstone with（70%）GC abrasive and（30%）SA abrasive is proposed for rough honing,this will improve the honing efficiency and reduce the cost;while cBN oilstone will get good effect.