超声振动辅助车削颗粒增强金属复合材料的温度实验研究

Research on turning temperature of PRMMCs with ultrasonic assistance

对超声切削颗粒增强金属基复合材料的温度进行了实验研究。采用自然热电偶法测量了整个切削过程的温度,发现超声切削温度曲线比普通切削的温度曲线更接近三角形分布的热源模型。采用T型热电偶测量出了超声切削温度的典型特征曲线,即波峰和波谷处均有5个大小基本相等的锯齿状微幅振动的峰值。还分别测量了普通和超声两种加工方式下的切削温度,发现普通车削的温度比超声车削的温度普遍高20℃以上,切削温度随切削速度、进给量和切削深度的增大而升高,但影响程度不同。

Cutting experiments on particle reinforced metal matrix composites(PRMMCs) are implemented.Cutting temperatures are measured by natural thermocouple,characteristic curves by T-type thermocouple.Results show that,compared with the curve of common cuttings,the curve of ultrasonic vibrated cuttings,which is 20 ℃ lower than the former curve,is more similar to that of triangle distributed heat resource.Characteristic curve indicates that there are five jagged small peaks that are generally equal to each other on the wave peaks and valleys separately.Cutting temperature increases differently with the increase of cutting speed,infeed speed and cutting depth.