【摘要】 为了提高立方氮化硼超硬材料的抛光效率,采用计算机仿真技术开发了曲柄摇杆抛光机构。从运动学和几何学原理出发,建立了曲柄摇杆机构的数学模型,得出了工件中心点的瞬时速度和运动轨迹,并开发了相应的计算机动态仿真软件,以图形的形式显示了工件中心点运动轨迹曲线以及瞬时速度曲线。研究了曲柄摇杆机构中各杆长度对工件中心点运动轨迹及瞬时速度的影响规律,寻求出了符合设计条件的最优组合参数,并将其成功地用于立方氮化硼材料的精密抛光技术中,加工效率比传统的抛光方式提高50%,取得了良好的效果。计算机仿真技术的应用,为新型机床的设计提供了一种简便有效的分析方法。更多还原

【Abstract】 To raise the polishing efficiency of Cubic boron nitride (CBN) superhard material, crank rocker arm mechanism has been developed by using Computer Simulation Technology. On the basis of kinematics and geometry principle, a mathematical model for the crank rocker arm mechanism was established. The moving path and the instantaneous speed of the workpiece center point on the crank rocker arm were derived. The computer dynamic simulation software was developed and the path curve and instantaneous speed have been figured. Before the crank rocker arm mechanism was applied to the machining process, the effect of the length of varies arms on the path curve and the instantaneous speed has been researched. The optimal parameter combinations which can meet the application requirement were found. The optimal mechanism has been applied to the polishing process of cubic boron nitride. The polishing efficiency is one and a half times higher than conventional method. The application of computer simulation software provides a simple and effective method for designing new machines.更多还原