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激光超声复合加工硬质合金的切削力理论与试验

发布时间:2019-05-10 00:15
【摘要】:为了实现硬质合金的延性域加工,研究激光加热与超声椭圆振动复合切削条件下,使用CBN(立方氮化硼)刀具对硬质合金进行精密加工的切削特性。分析硬质合金在普通切削、超声椭圆振动切削与激光超声复合切削三种切削方式下的切削力变化特征,建立激光超声复合切削的切削力理论模型,采用超精密车床与YAG激光器、自主研发的超声振动装置等辅助设备,试验研究激光超声复合精密加工硬质合金的切削特性。通过一系列的对比试验,分析切削参数,如切削速度、切削厚度对切削力的影响规律。理论模型与试验结果表明,由于硬质合金的软化和断续切削,使得激光超声复合辅助加工显著地降低了切削力,硬质合金的切削加工性能得到显著改善,通过工艺参数的优化,可以实现硬质合金的精密加工。
[Abstract]:In order to realize the ductile domain machining of cemented carbide, the cutting characteristics of cemented carbide were studied by using CBN (cubic boron nitride) tool under the condition of laser heating and ultrasonic elliptical vibration. The cutting force variation characteristics of cemented carbide in common cutting, ultrasonic elliptical vibration cutting and laser ultrasonic combined cutting are analyzed. The theoretical model of cutting force of laser ultrasonic composite cutting is established. The ultra-precision lathe and YAG laser are adopted. The cutting characteristics of laser ultrasonic composite precision machining of cemented carbide were studied by self-developed ultrasonic vibration device and other auxiliary equipment. Through a series of comparative tests, the influence of cutting parameters, such as cutting speed and cutting thickness, on cutting force is analyzed. The theoretical model and experimental results show that laser ultrasonic composite machining can reduce the cutting force significantly because of the softening and intermittent cutting of cemented carbide, and the cutting performance of cemented carbide has been improved remarkably, through the optimization of technological parameters, the cutting force of cemented carbide has been improved greatly, and the cutting performance of cemented carbide has been improved. The precision machining of cemented carbide can be realized.
【作者单位】: 河南理工大学机械与动力工程学院;
【基金】:国家自然科学基金资助项目(51075127)
【分类号】:TG135.5;TG66

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1 刘正兵;硬质合金表面构筑类金刚石碳膜及其水环境摩擦学性能[D];江西理工大学;2017年



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