文献类型：期刊文献

英文题名：Robot-assisted ultrasonic impact strengthening strategy for aero-engine blades

作者：Zhu, Lin[1];Gong, Congyang[2];Zhang, Chengcheng[2];Qian, Jin[1];Liu, Shuang[1];Zhang, Xiancheng[1];Liu, Changli[1]

机构：[1]East China Univ Sci & Technol, Key Lab Pressure Syst & Safety, Minist Educ, Shanghai 200237, Peoples R China;[2]AECC Commercial Aircraft Engine Co Ltd, Shanghai Engn Res Ctr Commercial Aircraft Engine, Shanghai 201108, Peoples R China

年份：2022

卷号：78

外文期刊名：ROBOTICS AND COMPUTER-INTEGRATED MANUFACTURING

收录：;EI(收录号：20222412213682);WOS:【SCI-EXPANDED(收录号:WOS:000807754200001)】；

基金：Acknowledgments The authors would like to acknowledge gratefully for the financial support through NSFC of China (No. 51975214 and No. 51725503) and the National Key Research and Development Program (2018YFC1902405) .

语种：英文

外文关键词：Aero-engine blade; TA19 titanium alloy; Restricted space; Trajectory planning; Ultrasonic impact treatment; Fatigue performance

摘要：As a vital component of aero-engine, blade is susceptible to damage from long-term service under cyclic loads. Ultrasonic impact treatment (UIT) can improve the mechanical properties of the material surface. However, applying UIT onto aero-engine blade remains a challenge due to the complex structure. This study investigates robot-assisted ultrasonic impact strengthening strategy for the complex surface in the restricted space. On the one hand, a novel robot-assisted UIT system is developed for a wide range of complex surface features. On the other hand, a non-interference trajectory planning method is introduced for complex surfaces in the restricted space of the blade. The breadth-first search (BFS) strategy based on the criterion of the induced ray is proposed for interference inspecting and optimizing the pose of the UIT tool. Experiments are conducted on real aeroengine blades. The results of numerical and experimental case studies have demonstrated that the proposed strategy can effectively cover the fatigue vulnerable areas without collision. Moreover, compressive residual stresses are generated both on the pressure and suction surface, and the fatigue limit of the UIT blades is improved by 26% as compared with the as-received blades.