回转曲面直纹面槽数控加工技术研究

摘要

A new approach was presented for the five-axis NC machining of the ruled surfaces slot with surface of revolution part.The cutter axis orientation and the cutter location point were identified though the ruled surface driving method in rough machining,and the calculation method was researched.The double points offset method was used to modify the error caused by flanking milling intractable ruled surface by cylindrical cutter.A cutter location point correction algorithm was presented to solve the problem of overcut in flat-end tool machining.Experimental results demonstrate that the proposed method not only solves the problem of machining principle error in flanking milling intractable ruled surface by cylindrical cutter,but also improves machined surface quality and reduces surface roughness and improves the quality of test piece reliably.%针对回转曲面直纹面槽类零件的数控加工问题对其五轴数控编程进行研究。粗加工采用直纹面驱动方法计算加工刀轴矢量和刀位点,对计算方法进行了研究。精加工采用两点偏置法修正刀轴矢量用以减少柱刀侧铣非可展直纹面产生的原理性误差;并且提出了一种刀位点修正算法,解决了平底刀加工曲面时所产生的过切问题。实例验证表明该算法大大减小了柱刀侧铣非可展直纹面产生的原理性误差,有效的提高了加工精度与表面质量,并且使用可靠。