基于激光清洗技术实现航空油滤维保的工艺研究

Research on Technology of Aviation Oil Filtration Maintenance Based on Laser Cleaning Technology

针对航空发动机零件修理中表面清洗的工艺需求,研究了纳秒和飞秒激光清洗航空用油滤的效果。研究了激光功率、扫描频率和线间距对加工效果的影响。结果表明纳秒激光主要的问题是能量过大引起的滤网烧蚀现象。需要控制能量的输入,避免对金属滤网产生烧损,最佳工艺参数为20 W,5000 mm/s,400 ns;飞秒激光的主要问题是能量不足导致清洗不够彻底,同时飞秒激光的高峰值功率特性会导致滤网金属丝表面出现细小的冲击坑,对于金属滤网的物理性能存在影响,需要适当保证高能量输入,同时避免对金属滤网造成过大的冲击以免损伤滤网丝,最佳工艺参数10 W,7000 mm/s,350 fs,获得的丝径均值为0.053 mm。

The effects of nanosecond and femtosecond laser cleaning aviation oil filters were studied for the process requirements of surface cleaning in aero engine parts repair.The effects of laser power,scanning frequency and line spacing on the processing results were investigated.The results show that the main problem of nanosecond lasers is the phenomenon of filter ablation caused by excessive energy.It is necessary to control the input of energy to avoid burning of the metal filter.The optimal process parameters are 20 W,5000 mm/s,400 ns.The main problem of femtosecond laser is insufficient energy,which leads to insufficient cleaning,and the high peak power of femtosecond laser.The characteristics will cause small impact craters on the surface of the filter wire,which has an impact on the physical properties of the metal filter.It is necessary to properly ensure high energy input,and avoid excessive impact on the metal mesh to avoid damage to the filter wire.The process parameters are 10 W,7000 mm/s,350 fs,and the average diameter of the obtained wire is 0.053 mm.