航发钛合金叶片金刚石砂带磨削的磨粒磨损研究

Investigation of grain wear in diamond abrasive belt grinding titanium alloy blade for aeroengine

金刚石砂带精密磨削航空发动机钛合金叶片时,砂带磨损对加工精度及表面质量一致性影响很大。针对这一问题,利用ABAQUS软件开展单颗磨粒磨削过程仿真研究,进而进行航发钛合金叶片金刚石砂带磨削试验。仿真及试验结果表明:在磨削速度为10~20 m/s时,摩擦接触点的温度达700 K以上,且随磨削速度的增大而升高;砂带磨损程度随磨削速度的增大而升高,与磨削速度对摩擦接触点磨削温度的影响规律一致。M10/20金刚石砂带的磨损形式为磨粒损耗和磨粒脱落,磨屑的黏结加剧了砂带的磨损。

In precision abrasive belt grinding process of titanium alloy aeroengine blade,the wear of diamond belt has a great influence on machining accuracy and surface quality consistency.To solve this problem,the simulation of the grinding process of titanium alloy with single diamond grain was carried out on ABAQUS.On this basis,the grinding experiments of titanium alloy blade with diamond abrasive belt was carried out.The results of simulation and experiment show that the temperature of friction contact point is more than 700 K in the range of grinding speed of 10~20 m/s,and that the temperature increases with the increase of grinding speed.It is also found that the wear degree of abrasive belt increases with the increase of grinding speed,which is consistent with the effect of grinding speed on the grinding temperature of friction contact point.The wear forms of M10/20 diamond belt are grain wear and grain shedding,and the adhesion of abrasive debris aggravates the wear of belt.