摘要
铝锂合金是航空航天工业中最理想的轻质高强结构材料,为提高铝锂合金切割质量,采用1 k W光纤激光器对2 mm铝锂合金进行切割试验。初步探讨了离焦量、辅助气体压力、激光功率和切割速度对切割质量的影响,深入研究了连续激光模式与脉冲激光模式下的切割质量差异,结果表明脉冲模式下切缝挂渣少、粗糙度小。在此基础上,通过正交试验直观分析、方差分析、信噪比分析对工艺参数进行优化设计,最终获得良好的切割质量:挂渣厚度为0.087 mm,表面粗糙度为4.81μm。
Aluminium-lithium alloy is the ideal material in aerospace industry for its lightweight and high strength. 2 mm aluminium-lithium alloy is used for laser cutting by employing 1 kW fiber laser to improve its cutting quality. The effect of the process parameters on the quality of laser cutting, such as defocus, gas pressure, laser power and cutting speed is studied. Cutting qualities under continuous laser mode and pulsed laser mode are compared. The results reveal that pulsed laser mode can achieve a better cutting quality. Optimization of technological parameters is performed by using the visual analysis of orthogonal experiment, the analysis of variance and the analysis of signal to noise ratio. Finally, the good quality with 0.087 mm slag thickness and 4.81 ~m surface roughness can be obtained.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2015年第2期78-85,共8页
Chinese Journal of Lasers
基金
航空科学基金(20115479006)
牵引动力国家重点实验室开放课题(TPL1303)
关键词
激光技术
光纤激光切割
工艺优化
方差分析
铝锂合金
laser technology
fiber laser cutting
process optimization
analysis of variance
aluminiumlithium alloy
