A forming method for improving surface integrity of film cooling holes

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	A forming method for improving surface integrity of film cooling holes
其他题名	一种提高表面完整性的气膜孔成形方法
	Zhao, Hua-Long; Zhou, Ren-Kui; Zhao, Hong-Yan; Zhao, Wei; Zhu, Wen-Yu; Yang, Xiao-Jun; Li, Ming; Deng, Yue
	2015-03-01
发表期刊	Hangkong Dongli Xuebao/Journal of Aerospace Power
卷号	30 期号:3 页码:649-655
摘要	In order to solve the problems of forming process of turbine blade of aero-engine film cooling holes, such as severe heat effect, a helix drilling and spiral drilling processing method for microholes by ultrafast laser was proposed, and a double power laser system was designed for machining of film cooling holes efficiently and without heat effect; the reason of heat effects was analyzed from two aspects of action mechanism and actual machining process; the main influential factors were pointed out and the optimization of process parameters and experimental verification targeting at these factors were processed using DD6 material. The experimental results show that the composite processing method using 500 fs laser and microseconds laser can increase fine drilling efficiency about 10 times, and can also process the film cooling holes on turbine blades without recast layer and micro-cracks; the process parameters include beam scanning speed of 2400 r/min, overlap rate of 12%, feeding amount of 5 μm, repetition frequency of 20 kHz and coaxial blow with the air pressure of 0.6 Pa. They also show that ultrafast laser with reasonable process parameters and processing methods can process film cooling holes without heat effects, so it is an effective technological method to improve the surface integrity of film cooling holes. ©, 2015, BUAA Press. All right reserved.
收录类别	EI
语种	中文
文献类型	期刊论文
条目标识符	http://ir.opt.ac.cn/handle/181661/27278
专题	瞬态光学研究室
推荐引用方式 GB/T 7714	Zhao, Hua-Long,Zhou, Ren-Kui,Zhao, Hong-Yan,et al. A forming method for improving surface integrity of film cooling holes[J]. Hangkong Dongli Xuebao/Journal of Aerospace Power,2015,30(3):649-655.
APA	Zhao, Hua-Long.,Zhou, Ren-Kui.,Zhao, Hong-Yan.,Zhao, Wei.,Zhu, Wen-Yu.,...&Deng, Yue.(2015).A forming method for improving surface integrity of film cooling holes.Hangkong Dongli Xuebao/Journal of Aerospace Power,30(3),649-655.
MLA	Zhao, Hua-Long,et al."A forming method for improving surface integrity of film cooling holes".Hangkong Dongli Xuebao/Journal of Aerospace Power 30.3(2015):649-655.

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