摘要
以5052铝合金板材为实验材料,采用控制变量法进行了单脉冲激光打孔实验,研究并得到了脉冲宽度、脉冲重复频率和离焦量等参数对激光打孔成形规律的影响,推荐了脉冲宽度、脉冲重复频率和离焦量等参数的合理选择范围,为5052铝合金脉冲激光微孔制造的工艺优化及参数选取提供了参考数据。研究表明脉冲宽度对孔径的影响比较大,脉冲重复频率对上下孔径的尺寸有影响(频率增大,上孔径变大,下孔径减小),通过合理降低脉冲重复频率、减小离焦量、增加脉冲宽度可以得到孔径小且锥度小的微孔。
The parameter control method is utilized to carry out the experimental investigation for the single pulse laser drilling of aluminum alloy 5052 sheets. Effects of pulse width, pulse recurrence frequency, and defocusing amount on microhole formation characteristics for laser drilling are achieved and the reasonable process parameter ranges are obtained, which can be the technical reference of process optimization and parameter selection for the pulsed laser drilling of aluminum alloy 5052. It shows that the laser pulse width can obviously influence the microhole diameter. Besides, the alteration of the pulse recurrence frequency may also result in the change of the drilled microhole diameter, that is, the entry hole diameter increases with the pulse repetition frequency. However, the radial size alteration for the exit hole shows a reverse trend. In addition, less tapered microholes with relatively small diameters can be drilled through appropriately decreasing pulse repetition frequency, reducing defocusing amount,and increasing pulse width.
出处
《激光与光电子学进展》
CSCD
北大核心
2015年第12期111-115,共5页
Laser & Optoelectronics Progress
基金
国家973计划(2011CB013004)
江苏省高校自然科学研究项目(11KJA460003
15KJD460002)
江苏省科技支撑计划(工业)重点项目(BE2013009)
江苏高校优势学科建设工程资助项目
江苏省"六大人才高峰"项目(2013-ZBZZ-025)
江苏大学高级人才科研启动基金(14JDG020)
关键词
激光技术
激光材料加工
脉冲激光打孔
控制变量法
微孔成形
5052铝合金
laser technique
laser materials processing
pulsed laser drilling
parameter control method
microhole formation
aluminum alloy 5052
