Research on Machining Technology of Nozzle Hole Based on Femtosecond Laser

Song Guomin, Zhou feng, Wu Yulong, Zhang Limin

（FAW Wuxi Fuel Injection Equipment Research Institute, Wuxi 214063） Abstract：this paper introduces the principle of femtosecond laser processing technology, and studies the application of femtosecond laser on nozzle hole processing, with emphasis on the analysis of laser wall protection technology of different filling materials for micro cavity environment. Application scope of femtosecond laser as a cold processing method is expanded through the research of femtosecond laser micro hole processing technology, which provides a feasible processing route for improving performance of fuel injection system. Key words: Femtosecond, Injector nozzle, Laser wall protection, Fuel injection