一种基于时间分割法和数字积分法混合实现的空间直线插补方法

A kind of spatial straight line interpolation method based on the hybrid realization of time division method and digital integration method

在空间曲面铣削加工中,进给速度的平滑性直接影响加工表面的质量。文中提出了一种应用时间分割法(TDM)和数字积分法(DDA)混合实现的空间直线插补方法(HSLIM),用以改进通常采用时间分割法直线插补产生零头距离而出现的难以保持平滑进给速度的问题。该算法是采用时间分割法中的时间分割原理,对数字积分法中的累加溢出过程按照进给速度的要求,采用可控的插补周期进行时间分割,从而用较少的计算量消除了零头距离,实现平滑的进给速度。仿真实验与实际加工实验都表明,该方法可以实现平滑的进给速度,明显改善加工表面质量。

In the process of milling cutting of spatial curved surfaces, the smoothness of feeding speed would affect directly against the quality of surfaces being machined. A kind of spatial straight line interpolation method based on hybrid realization of time division method （TDM） and digital integration method （DIM） was put forward in this paper so as to improve the problem difficult to maintain a smooth feeding speed that arisen from the odd distance produced in the straight line interpolation of the commonly adopted time division method. The being proposed algorithm adopts time division principle in the time division method and uses the controllable interpolation period to carrying out time division on the accumulated overflowed process according to the requirement of feeding speed in the digital integration method, thus eliminated the odd distance with a rather small computational cost to realize a smooth feeding speed. The simulation test and the actual machining experiment both showed that this method could realize smooth feeding speed and obtain distinct improvement on the quality of machined surfaces.