基于点云的超精密铣削加工三维表面形貌仿真

基于刀刃扫掠点点云方式,提出一种超精密加工三维表面形貌模型.通过对加工部分刀刃在加工过程中的运动学描述,将三维表面形貌用离散点云数据表达.根据加工曲面信息和采样点数目对仿真区域进行划分并建立随动包容盒,对包容盒内数据进行数值分析和空间变换计算以获得工件三维表面形貌.算法仿真与表面轮廓仪测量结果表明：该仿真算法能够表征超精密铣削加工下工件表面双向残留高度特征,并体现出刀具切入相位角对表面形貌的影响,为三维表面形貌超精密加工提供了一种新的思路.

Three-dimensional surface topography simulation of ultraprecision milling based on point cloud

A three-dimensional surface topography simulation algorithm for ultra-precision milling was proposed.In order to illustrate the formation of surface topography,blade point clouds which were consisted by a serial of blade points according to calculating the instantaneous locations of static discrete blade points in machining process,was introduced as the research object.Meanwhile the servo bounding boxes which were constructed by meshing simulation surface were utilized to selecting sampling points.The comparison between simulation results and measurement pictures shows that the algorithm can clearly illustrate the distribution of scallop in different directions,as well as the influence on the topography caused by initial cutter phrase.Hence,it provides a method to the research the surface topography composition in the range of ultra-precision milling machining.