超声振动加工参数对GH4169合金磨削力的影响  

Effect of Ultrasonic Vibration Machining Parameters on Grinding Force of GH4169 Alloy

作　　者：史春光 张敏良 柴宁生 龚楠 谢浩 Shi Chunguang;Zhang Minliang;Chai Ningsheng;Gong Nan;Xie Hao(School of Mechanical and Automotive Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)

机构地区：[1]上海工程技术大学机械与汽车工程学院,上海市201620

出　　处：《农业装备与车辆工程》2022年第5期107-111,115,共6页Agricultural Equipment & Vehicle Engineering

摘　　要：为了研究超声振动磨削(Ultrasonic Vibration Grinding,UVG)过程中砂轮的振动频率、振幅和磨削速度对磨削力的影响。利用MATLAB定值计算了这3个参数的净切削时间比。以GH4169合金为研究对象,建立单颗磨粒超声振动磨削的数学模型和二维正交有限元模型,并与常规磨削(Conventional grinding,CG)过程进行对比。首先研究了切削区域的Mises应力分布和磨削区域瞬时磨削力的变化曲线,然后探究磨粒的振动频率、振幅和磨削速度对UVG平均磨削力的影响。结果表明:数学模型和有限元仿真结果趋势相同,超声振动可有效减小切削力;磨削力随着砂轮的振动频率和振幅的增大而减小,且递减速率逐渐减慢;在合适范围内低速磨削有利于提高加工表面质量。The aim is to study the influence of the vibration frequency, amplitude and grinding speed of the grinding wheel on the grinding force in the process of Ultrasonic Vibration Grinding(UVG). The net cutting time ratios of these three parameters are calculated by MATLAB setting. The research group took GH4169 alloy as the research object, established a mathematical model of single abrasive particle ultrasonic vibration grinding and a two-dimensional orthogonal finite element model, and compared with the conventional grinding(Conventional Grinding, CG) process. First, the Mises stress distribution in the cutting area and the change curve of the instantaneous grinding force in the grinding area are explored;second, the influence of the vibration frequency, amplitude and grinding speed of the abrasive particles on the UVG average grinding force is explored. The results show that the mathematical model and the finite element simulation results have the same trend, ultrasonic vibration can effectively reduce the cutting force;the grinding force decreases with the increase of the vibration frequency and amplitude of the grinding wheel, and the deceleration rate gradually slows down;low-speed grinding in a suitable range is beneficial to the improvement of surface quality.

关 键 词：超声振动 磨削力 GH4169 有限元仿真 净切削时间比 

分 类 号：U469.72[机械工程—车辆工程]