变位自转式双平面研磨方法仿真研究及加工实验  

The Simulation and Machining Experiment of the Double-side Flat-lapping Method of Displacement-rotation

作　　者：闫雯[1] 黄玉美[1] 高峰[1] 穆卫谊[1] 

机构地区：[1]西安理工大学机械与精密仪器工程学院教育部数控机床及机械制造装备集成重点实验室,西安710048

出　　处：《机械科学与技术》2014年第10期1500-1504,共5页Mechanical Science and Technology for Aerospace Engineering

基　　金：国家重点基础研究发展计划(973计划)项目(2009CB724406);国家自然基金项目(50875209)资助

摘　　要：针对传统平面研磨方法中,工件中心研磨轨迹重复率高,研磨速度径向分布不均的缺点,基于固着磨料研磨技术提出一种变位自转式双平面研磨加工方法。工件在研具的运动中获得变化的研磨力,在隔离盘内实现变位自转的研磨运动形式。从研磨原理上改变了传统研磨加工中工件的运动模式,增加了工件的自由度,实现了工件在自转的同时其回转中心与研具中心存在时变的相对运动,即工件回转中心相对于研具的运动轨迹是具有时变性的曲线。不同的研磨运动形式从根本上克服了传统方法的缺点,并依此原理研制了新型数控研磨机床。通过对变位自转研磨加工轨迹曲线的仿真分析,证明了这种研磨方法有利于改善研磨相对速度分布均匀性、研磨轨迹时变性,获得更好的研磨加工质量,加工实验证明在相同加工参数下,该研磨方法相对于行星轮式的研磨方法获得了更低的表面粗糙度。Aiming at the questions of traditional flat-lapping method that high repetition rate of lapping trajectory on workpieee center point, and velocity distribution inhomogeneous in radial, a double-side fiat-lapping method of displacement-rotation based on the solid abrasive lapping technology is proposed. Workpiece is driven by varietal lapping force which comes from the movements of lapping tool. The motion pattern of workpiece is changed in principle, and the degrees of freedom in workpiece are increased. A random relative motion between workpiece and lap tool while the workpiece rotates is put into effect. The trajectory in the rotation center of both workpieee and lap tool are time-variant curves. For the different lapping process, the new method overcomes the deficiencies in the common lapping method, and a new CNC lapping machine tool is developed on the basis of the present principle. The simulation analysis further verifies that the new method has the advantage in improving the uniformity of velocity distribution, and the time variation in lapping trajectory. The compared experiment shows that the new lapping method reached lower surface roughness than that for the planet type lapping at the same processing conditions.

关 键 词：固着磨料 变位自转 研磨轨迹 速度分布 

分 类 号：TH16[机械工程—机械制造及自动化] TH164