【摘要】 为了解超声振动切削对切削温度的影响,促进该技术在炸药机械加工领域中的应用,对HMX基高聚物粘结炸药(PBX)模拟材料进行了传统切削和超声振动切削的对比试验,测试了已加工表面和刀尖区域的切削温度分布,分析了超声振动切削对切削累积热的作用机制。结果显示:两种切削方式的切削温度均随切削速度、切削深度和进给量的增大而增加,且超声振动切削的增加量更大,给定切削参数下的最高切削温度为78.1℃,较传统切削高31.3℃。分析表明:超声振动切削的生成热低于传统切削,散失热高于传统切削,激振热量的累积是造成切削温度高于传统切削的关键原因;当激振热量大于、等于或小于散失热与生成热变化量之和时,切削温度较传统切削升高、不变或降低。更多还原

【Abstract】 In order to evaluate the effect of ultrasonic vibration cutting( U VC) on cutting temperature( C T),U VC and conventional cutting( C C) tests on HM X based PBX explosive simulants w ere carried out. C T of machined surface and cutting tool nose w ere detected by infrared thermal imager in the machining process. R esults show that C T of the tw o method all increase w ith the cutting speed,cutting depth and amount of feed. And the cutting temperatures of U VC are all higher than that of C C. T he highest C T of U VC is 78. 1 ℃,higher than that of C C by 31. 3 ℃. T he cutting heat of U VC is less than that of C C,and the dissipated heat of U VC is more than that of C C. T he main reason for the augment of C T is the cumulation of excitation heat in U VC,w hich plays a decisive role in final C T. It is possible to obtain a higher,unaltered or a low er C T of U VC compared to C C.更多还原