摘要
航空发动机叶片表面完整性严重影响叶片疲劳强度和服役寿命。为掌握砂布轮柔性抛光叶片表面完整性关键表征参数,基于“数控机床+柔性磨头+弹性磨具(砂布轮)”的抛光工艺装备开展了TC4叶片抛光试验和表面完整性检测,对比了抛光前后表面完整性各项表征参数变化,分析了变化机理,结果表明:砂布轮柔性抛光对叶片表面粗糙度、表面微观形貌、表面残余应力、表面显微硬度有明显改善,对深度方向残余应力、深度方向显微硬度、微观组织没有影响。研究结果为砂布轮抛光表面完整性控制提供了依据。
The surface integrity of aeroengine blades seriously affects the fatigue strength and service life of the blades.In order to master the key parameters of the surface integrity of the flexible polishing blade of abrasive cloth wheel,the polishing test and the surface integrity test of TC4 blade were carried out based on the polishing technology equipment of"NC machine+flexible grinding head+elastic grinding tool(abrasive cloth wheel)".The changes of surface integrity parameters before and after polishing were compared,and the changes mechanism was analyzed,the results show that the flexible polishing of abrasive cloth wheel can obviously improve the surface roughness,surface micro-morphology,surface residual stress and surface micro-hardness,however,the residual stress in depth direction,microhardness in depth direction and microstructure were not affected.The results provide a basis for surface integrity control of abrasive cloth wheel.
作者
淮文博
蔺小军
史耀耀
HUAI Wenbo;LIN Xiaojun;SHI Yaoyao(National Experimental Demonstration Teaching Center for Engineering Training,Xi'an University of Technology,Xi'an 710048,China;School of Mechatronics,Northwestern Polytechnical University,Xi'an 710072,China)
出处
《机械科学与技术》
CSCD
北大核心
2021年第11期1735-1740,共6页
Mechanical Science and Technology for Aerospace Engineering
基金
国家自然科学基金项目(51675439)
西安理工大学校博士启动金(121-451119001)。
关键词
柔性抛光
叶片
表面完整性
关键表征参数
flexible polishing
blade
surface integrity
key characterization parameters
