CFRP单向板超声振动辅助螺旋铣孔孔壁的质量试验

Study on Surface Quality of Hole Wall in Ultrasonic Vibration-Assisted Helical Milling of Unidirectional CFRP

通过普通螺旋铣及超声振动辅助螺旋铣(Ultrasonic vibration helical milling,UVHM)加工CFRP单向板的单因素对比试验,分析了孔0°、45°、90°、135°处的纤维破坏形式及孔壁形貌不同的原因及切削力周期性变化及FX的幅值大于FY的幅值的原因,其中135°处的孔壁处受加工参数影响较大,且质量最差,基于此着重研究了135°处孔壁质量随加工参数的变化规律。结果表明,与普通螺旋铣相比UVHM的切削力大幅降低,降幅达50%,且UVHM加工孔的孔壁质量更优;孔壁质量随着加工参数的变化均有一定的变化规律。

Through the single-factor comparison test of ordinary helical milling and ultrasonic vibrationassisted helical milling(UVHM)for processing unidirectional CFRP,the reasons for the fiber failure forms and the different hole surface quality at 0°,45°,90°,135°of the holes were analyzed.The mechanism of cutting force generation and periodic change were also analyzed.The hole surface at 135°was greatly affected by the processing parameters,and the quality was the worst.Based on this,the influence of processing parameters on the hole surface quality at 135°was emphasized.The results show that compared with ordinary helical milling,the cutting force of UVHM was greatly reduced by 50%,and the quality of the surface of the UVHM machined hole was better;the quality of the hole wall is affected in some way by the processing parameters.