Process in laser drilling of deep microholes without taper on metal materials  

作　　者：FAN RunZe MEI XueSong CUI JianLei 

机构地区：[1]State Key Laboratory for Manufacturing Systems Engineering,Xi’an Jiaotong University,Xi’an 710054,China

出　　处：《Science China(Technological Sciences)》2024年第1期37-59,共23页中国科学（技术科学英文版）

基　　金：This work was supported by the Science Center for Gas Turbine Project(Grant No.P2022-A-IV-002-003);the National Natural Science Foundation of China(Grant No.52022078);Shaanxi Provincial Key Research and Development Program(Grant No.2021ZDLGY10-02);the fund of the State Key Laboratory of Solidification Processing in NPU(Grant No.SKLSP202203).

摘　　要：Deep microhole machining is currently a prominent research area within the aerospace field,encompassing blade film cooling and fuel injection control technologies.However,taper defects in metal materials may lead to performance degradation or even structural damage over a component’s lifetime.Trepanning and helical drilling,facilitated by ultrashort pulse lasers,have proven more suitable for achieving high-precision,deep holes in metal materials.Nonetheless,excessive repetition rates can also result in severe thermal damage.Various methods are commonly employed for controlling taper,including parameter optimization,assistance,and secondary modification.Tilted laser beam drilling is widely utilized and has been integrated into relevant machining systems for commercial applications.Typical deep microholes include film cooling holes and injection microholes.Laser drilling is a potential machining method for new materials in the aerospace field.Although laser drilling processing has been studied,numerous related scientific challenges and technical difficulties must be addressed before practical implementation.

关 键 词：AEROSPACE laser drilling deep microhole taper control 

分 类 号：TG665[金属学及工艺—金属切削加工及机床]