航发叶片前后缘数控砂带磨削关键技术研究

摘要

In order to improve the machining accuracy and efficiency of the leading and the trailing edges (LTE) of aircraft engines blade,the existing problems in grinding of the current aircraft engines blade edges were analyzed,combined with the current requirements of machining technology for LTE and the motion control algorithms of computer numerical control(CNC) belt grinding machine,considering the influence of the grinding elements such as particle size,contact force,belt speed and feed rate,the tool trajectories are optimized,a grinding technology of the blade edges is put forward.Finally,the aircraft engines blades were subjected to actual grinding experiments.The experimental results show that the grinding method can obviously improve the machining precision and the surface roughness of the blade.%为提高航发叶片前后缘加工精度和加工效率,通过对当前航发叶片前后缘磨削加工中存在的问题进行分析,结合当前叶片前后缘加工工艺要求及数控砂带磨床各轴运动控制算法,考虑到磨料粒度、接触力、砂带线速度及进给速度等磨削要素的影响,优化了刀具轨迹,提出了叶片前后缘磨削工艺方法.最后,对某公司生产的航发叶片进行了磨削加工实验,实验结果表明,此磨削加工方法可使得航发叶片前后缘的加工精度和表面粗糙度得到明显的改善.