Experimental Investigation of Recast Layer Distribution Affected by Auxiliary Target Back Materials During Laser Drilling[J]. 2017, 51(8): 128-135.
DOI:
Experimental Investigation of Recast Layer Distribution Affected by Auxiliary Target Back Materials During Laser Drilling[J]. 2017, 51(8): 128-135.DOI: 10.7652/xjtuxb201708021.
Experimental Investigation of Recast Layer Distribution Affected by Auxiliary Target Back Materials During Laser Drilling
To reduce thickness of recast layer and burr around the hole exiting in laser percussion drilling
adding auxiliary materials on target back is considered to explore the effect of auxiliary materials with different absorption ability on the distribution of recast layer. High-transparency material(quartz glass)
high-absorptivity material(paraffin)and light-scattering material(NaCl)are selected to investigate their corresponding impacts on the morphology of holes and thickness of recast layer. It is revealed that the strategy including these three different materials is able to effectively reduce the thickness of recast layer and the burr around hole exit
while the thickness of recast layer around the hole entrance increases to different extents for various auxiliary materials
and the pulse duration obviously affects the drilling result. Compared with the other two materials
NaCl gains advantage of smaller increase in recast thickness around the hole entrance
and reduces the recast layer thickness around the hole exit to 10-15 μm
namely
reduces the thickness by more than 60%.
关键词
Keywords
references
孙承纬. 激光辐照效应 [M]. 北京: 国防工业出版社, 2002: 3.
MURRAY A J, TYRER J R. Nd: YAG laser drilling of 8.3 mm thick partially stabilized tetragonal zirconia-control of recast layer microcracking using localized heating techniques [J]. Journal of Laser Applications, 1999, 11(4): 179-184.
王健. 高峰值功率激光脉冲组打孔技术 [J]. 航空工艺技术, 1995(s1): 16-18.
WANG Jian. Drilling by using high peak power laser pulse group [J]. Aeronautical Manufacturing Technology, 1995(s1): 16-18.
LINLOR W I. Ion energies produced by laser giant pulse [J]. Applied Physics Letters, 1963, 3(11): 210-211.
ZENG D, LATHAM W P, KAR A. Two-dimensional model for melting and vaporization during optical trepanning [J]. Journal of Applied Physics, 2005, 97(10): 471-512.
MISHRA S, YADAVA V. Modeling and optimization of laser beam percussion drilling of nickel-based superalloy sheet using Nd: YAG laser [J]. Optics and Lasers in Engineering, 2013, 51(6): 681-695.
DUBEY A K, YADAVA V. Experimental study of Nd: YAG laser beam machining: an overview [J]. Journal of Materials Processing Technology, 2008, 195(1): 15-26.
CHIEN W T, HOU S C. Investigating the recast layer formed during the laser trepan drilling of Inconel 718 using the Taguchi method [J]. The International Journal of Advanced Manufacturing Technology, 2007, 33(3/4): 308-316.
DUAN Wenqiang, WANG Kedian, DONG Xia, et al. Study on machining of high-quality micro-holes by laser trepan drilling [J]. Journal of Xi'an Jiaotong University, 2015, 49(3): 95-103, 112.
DUAN Wenqiang, WANG Kedian, DONG Xia, et al. Experimental characterizations of burr deposition in Nd: YAG laser drilling: a parametric study [J]. The International Journal of Advanced Manufacturing Technology, 2015, 76(9/10/11/12): 1529-1542.
DUAN Wenqiang, DONG Xia, WANG Kedian, et al. Effect of temporally modulated pulse on reducing recast layer in laser drilling [J]. The International Journal of Advanced Manufacturing Technology, 2016, 87(5/6/7/8): 1641-1652.