基于控制线的开式整体叶盘叶片四轴数控加工刀轴控制方法

 针对开式整体叶盘叶片数控加工中存在的干涉及刀轴变化稳定性问题,提出了一种基于刀轴控制线的四轴刀轴矢量控制方法。阐述了基于刀轴控制线的四轴刀轴控制基本原理,通过对四轴无干涉刀轴摆动区间的计算,建立了四轴无干涉刀轴控制面;根据控制线生成准则,给出了在刀轴控制面上生成刀轴控制线的具体算法。实验验证表明,该方法不仅可解决开式整体叶盘叶片加工中的刀具干涉问题,而且有效避免了刀轴突变引起的叶片啃伤现象,明显提高了叶片表面的加工质量。

A Cutter-axis Vector Control Method for Open Blisk 4-axis NC Machining Based on the Control Curve

In order to deal with cutter collision in open blisk NC machining and the instability of tool axis,a control method of cutter-axis vector for 4-axis NC machining based on the control curve of tool axis is presented.The fundamental principles in control of cutter-axis vector for four axes are discussed.Through calculating the swinging interval of the cutter center in the collision-free tool axis for four axes,the control surface in the collision-free tool axis for 4 axes is established.According to the rule of generation of the control curve,the specific algorithm for generating the cutter-axis control curve on the control surface is given.Experimental results demonstrate that the proposed method can not only solve the problem of cutter collision in open blisk NC machining,but also avoid blade bite injury caused by cutter axial mutation,thus improving the quality of blade machining significantly.