Ti-22Al-25Nb微铣削表面粗糙度试验研究

Experimental Study on Surface Roughness of Ti-22Al-25Nb Micro-milling

为研究Ti-22Al-25Nb微铣削的表面质量并确定合适的加工参数,对Ti-22Al-25Nb进行三因素五水平的微铣削正交试验和极差、方差分析,根据振动信号绘制稳定性极限图,研究铣削深度、每齿进给量和主轴转速对加工稳定性和表面粗糙度的影响规律。结果表明,铣削深度对表面粗糙度的影响最大,主轴转速次之,每齿进给量最小,并得出最优加工参数组合,此时表面粗糙度为0.21μm。该研究为Ti-22Al-25Nb微铣削加工提供了理论支持。

In order to study the surface quality of Ti-22Al-25Nb micro-milling and determine appropriate processing parameters,a three-factor and five-level micro-milling orthogonal experiment is conducted on Ti-22Al-25Nb and range and variance analysis are performed,and a stability limit diagram is drawn based on the vibration signal.The influence of milling depth,feed rate per tooth,and spindle speed on machining stability and surface roughness are studied.The results show that the milling depth has the greatest effect on surface roughness,followed by the spindle speed and the feed rate per tooth,and the optimal combination of machining parameters is obtained.At this time,the roughness is 0.21μm.This research can provide theoretical support for Ti-22Al-25Nb micro-milling machining.