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STEP-NC是一个用来实现CAD/CAM与CNC系统间数据交换的接口标准,基于STEP-NC的CNC系统是未来数控技术发展方向之一,该系统不但具有直线和圆弧插补功能,而且还具有样条曲线插补功能。为此设计了一个统一的基于NURBS样条曲线插补的通用插补器,并开发了一种基于等弧长的插补技术和插补算法。最后通过仿真和实例加工验证了该算法的有效性和可靠性。
STEP-NC is an interface standard used to exchange data between CAD / CAM and CNC system. The STEP-NC based CNC system is one of the future development directions of NC technology. The system not only has the function of linear and circular interpolation, Also has spline interpolation. For this reason, a universal interpolator based on NURBS spline curve interpolation is designed and an interpolation algorithm and interpolation algorithm based on equal arc length are developed. Finally, the effectiveness and reliability of the algorithm are verified by simulation and example processing.