大口径火炮深孔内螺旋线电解加工参数的优化

摘要

To solve the problem of helix forming in deep hole of large caliber artillery in ECM,this research is devoted to the interactional variation of maj or parameters in ECM for the gun steel 32CrNi3 MoV.Three principal influencing factors:material removal rate,overcut-diameter and overcut-depth,are selected as experimental indexes.Then,through L16 (25 )orthogonal experiments and grey correlation analysis,the machining parameters are optimized,which provides the specific processing reference for helix forming in deep hole of large caliber artillery during ECM with high efficiency,high precision and non-stress.The results show that maximum material removal rate as well as minimum overcut-aperture and overcut-depth are obtained with the voltage of 9 V,the feed speed of 0.5 mm· min-1 ,electrolyte pressure of 0.6 MPa and 10% NaNO3+ 2.5% NaClO3 electrolyte.The reasonable matching of the electrolytic process parameters for the gun tube material 32CrNi3 MoV is realized.%为解决大口径火炮深孔内螺旋线加工,研究了火炮炮管材料32CrNi3 MoV电解加工主要参数相互影响变化规律.选取材料去除率、孔径过切量和深度过切量为试验指标,采用L16(25)正交试验和灰色关联分析法实现了加工参数优化,得到了深孔内螺旋线高效率、高精度无应力电解加工成型的优化工艺参数.结果表明:加工电压为9 V、进给速度为0.5 mm·min-1、电解液压力为0.6 MPa和采用10%NaNO3+2.5%NaClO3电解液时,材料去除率达到最大,孔径过切量和深度过切量达到最小,实现了火炮炮管材料32CrNi3 MoV电解加工参数合理匹配.