整体叶盘数控砂带磨削技术及其试验

针对航空发动机整体叶盘结构复杂、材料难加工,铣削加工后粗糙度无法达到设计要求,铣削纹理明显,目前的手工抛光难以满足整体叶盘表面质量和型面精度要求的现状,提出了整体叶盘数控砂带磨削技术及其工艺试验。概述了整体叶盘砂带磨削研究进展,分别从新型砂带磨削技术和自适应砂带磨削技术等方面阐述了整体叶盘全型面数控砂带磨削技术。介绍了整体叶盘全型面数控砂带磨削试验装置及其数控磨削加工软件,利用该装置完成了4种不同级别的整体叶盘精密磨削加工试验。结果表明:整体叶盘磨削后,表面粗糙度小于0.4μm,型线精度小于0.05mm,同时型面精度一致性显著提高。

Experimental on the Computer Numerical Control of Belt Grinding Technology for Blisk

For complex surface structure and dififcult to machining materials for aeroengine blisk, the surface rough-ness is outer design requirements by precision milling, and the milling texture is obvious. The experiment on the computer numerical control (CNC) of belt grinding technology for blisk is proposed for the surface quality and proifle accuracy re-quirements, which is dififcult to meet by the method of manual polishing. Firstly, the current belt polishing for blisk is stud-ied, and then, the CNC belt grinding for blisk is studied from the new belt grinding technology, force adaptive belt grinding technology and six-axis principle. Secondly, the CNC belt grinding equipment and software are introduced. Finally, four different blisks are used to experiment research. The results show that the surface roughness is less than 0.4μm, the proifle accuracy is less than 0.05mm and the precision consistency is signiifcantly improved.