激光超声复合加工硬质合金的切削特性研究

发布时间：2018-03-29 19:13

本文选题：硬质合金　切入点：切削力　出处：《机械科学与技术》2017年04期

【摘要】：研究了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)刀具对硬质合金材料进行精密加工的切削特性。利用有限元仿真,分析硬质合金材料在普通切削、一维超声振动切削、超声椭圆振动切削与激光超声复合切削4种切削方式下的切削力变化特征。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,实验研究了激光超声复合精密加工硬质合金的切削特性。通过一系列的对比实验,分析切削参数,如切削速度、切削厚度,对切削力的影响规律。仿真与实验结果表明,由于加工材料的软化和断续切削,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 this paper, the cutting characteristics of CBN (cubic boron nitride) cutting tool for the precision machining of cemented carbide material under the condition of laser heating and ultrasonic elliptic vibration composite cutting are studied. The finite element simulation is used to analyze the cemented carbide material in common cutting. The cutting force variation characteristics of one dimensional ultrasonic vibration cutting, ultrasonic elliptical vibration cutting and laser ultrasonic combined cutting are adopted. The auxiliary equipments such as ultra-precision lathe and YAG laser, ultrasonic vibration device developed by ourselves are adopted. The cutting characteristics of laser ultrasonic composite precision machining cemented carbide are studied experimentally. Through a series of comparative experiments, the influence of cutting parameters, such as cutting speed, cutting thickness and cutting force, on the cutting force is analyzed. The simulation and experimental results show that, Due to the softening and intermittent cutting of the machining material, the cutting force is significantly reduced and the cutting performance of the cemented carbide is greatly improved by laser combined ultrasonic assisted machining. The precision machining of the cemented carbide can be realized by optimizing the process parameters.
【作者单位】：河南理工大学机械与动力工程学院;
【基金】：国家自然科学基金项目(51075127)资助
【分类号】：TG666

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