【作者】 杨旭静； 胡仲勋；

【机构】 湖南大学汽车车身先进设计制造国家重点实验室；

【摘要】 NURBS刀具路径在自由曲面的加工中具有高精度、高效率和良好的加工平顺性等优点。论文研究了曲面数控加工的NURBS刀具路径生成理论及算法,通过精确计算拟合偏差的方式来优化优化控制顶点的数目和位置,从而实现NURBS曲线的高精度拟合和刀具路径生成。实例研究表明算法拟合精度高、稳定可靠,并且容易实现编程,适用于自由曲面数控加工中的NURBS刀具路径计算与生成,能够满足模具型面的高性能数控加工需求。更多还原

【Abstract】 A new approach is proposed to fit the cutter locations with NURBS curve for generating NURBS tool paths. The algorithm uses a new high precision fitting method to fit the tool paths through the cutter locations more precisely with fewer control points. Thus a NURBS tool path with higher accuracy and more concise program can be generated. Examples of sculptured surface are designed and the NURBS tool paths are generated. The results of application are analyzed to demonstrate the advantages of the approach.更多还原