单齿飞刀铣削航天薄壁件加工工艺优化研究

Research on Milling Optimization Process of Aerospace Thin-Walled Parts with Single-Tooth Knife

针对航天薄壁件加工过程中的变形问题,基于正交试验方法优化航天薄壁件飞刀铣削参数组合,采用极差分析法并绘制试验指标与各试验因素间的关系曲线图得出了各因素对加工质量的影响程度,并以此为基础优化参数,进行航天薄壁件铣削加工工艺优化研究。试验表明:主轴转速n和刀具圆弧半径r对工件表面质量影响较大,且各因素对表面粗糙度的影响程度大小顺序为:主轴转速、刀具圆弧半径、刀具后角、进给量、背吃刀量。采用优化后的工艺参数加工试验,当r=1.1mm、a0=8mm、f=8μm/r、ap=1μm和n=950r/min时,得到了表面粗糙度Ra为72nm的质量表面。

Thin-walled parts for the aerospace process of deformation,based on orthogonal test method,is to optimize aerospace flying thin-walled milling parameter combinations,using range analysis to obtainthe degree of influence of various factors on the processing quality,and as a basis for optimization parameters,optimizes aerospace thin-walled milling processes. Tests showed that： the spindle speed n and tool radius r put greater impact on surface quality. The degree of influence of the surface roughness order is spindle speed,tool radius,tool rear angle,feed rate,and back cutting depth. The use of process parameters optimizes processing test,when r=1.1mm,a0=8mm,f=8μm/r,ap=1μm and n=950r/min,it obtais a surface roughness of the surface quality of Ra=72nm.