超声振动干式车削尺寸精度实验研究

Research on Finishing Size Precision in Ultrasonically Vibrated Dry Turning

采用超声振动干式车削方法对钨基合金材料进行了车削加工实验,研究了切削参数、振动参数对零件加工尺寸精度的影响。结果表明,在切削深度一定的前提下,对于加工圆度影响的主次关系为:进给量>振动振幅>切削速度;而对锥度影响的主次关系为:振动振幅>切削速度>进给量。在低速低进给加工方式下,振动车削的抑振效果不明显,但随着切削速度、进给量的增大,振动切削抑振效果显著。本实验条件下,当振动振幅为3μm时,对工艺系统具有较佳的抑振效果。

By the experiments of finishing size precision in dry turning W- based alloy with ultrasonic vibration, the influence of cutting parameters and vibration parameters on finishing size precision was studied. The results shown that the factors influence roundness error by the orders of feedrate, tool amplitude and cutting speed, while the factors influence taper error by the orders of tool amplitude, cutting speed and feedrate. While the cutting speed and feedrate was low in ultrasonically assisted turning, the effect of suppressing chatter was indistinct. With the cutting speed and feedrate increasing, the effect of suppressing chatter was distinct. In the experiments, it was when tool amplitude was 3 μm that turning system had most effective effect of suppressing chatter.