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能量比对双光束激光焊接特性的影响

Effect of Energy Ratio on Dual Beam Laser Welding Characteristics

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摘要

系统研究了双光束焊接过程中能量比对焊缝成形以及能量利用率的影响,采用高速摄像技术实时观察了不同能量比下的熔池行为,分析了能量比对双光束焊接特性的影响机制。结果表明,随着能量比增大,双光束焊缝熔深先减小后增大,熔宽变化规律与之相反,并在能量比为50/50时获得最小熔深和最大熔宽。不同能量比下能量利用率差别较大,能量比为20/80和50/50时分别获得最大值32.7%和最小值27.8%。熔池尺寸同样受能量比的影响,随着能量比增大,熔池长度先增大后减小,而宽度一直减小。能量比对双光束焊接特性的影响主要归因于焊接过程中匙孔状态以及熔池流动方式的改变。

Abstract

Effect of energy ratio on weld formation and energy efficiency in the dual beam welding process was systematically studied. Molten pool behaviors under different energy ratios were observed in real time by the high speed video system. Influence mechanism of the energy ratio on dual beam laser welding characteristics was also revealed. Results show that the weld penetration depth increases and then decreases as the energy ratio increases, while the weld width shows the opposite variation tendency. The minimum penetration depth and maximum width are obtained at the energy ratio of 50/50. Energy efficiency is significantly different from each other with different energy ratios. The maximum energy efficiency is 32.7% at the energy ratio 20/80, while the minimum is 27.8% at the energy ratio 50/50. Molten pool size is also affected by the energy ratio. Molten pool length increases first and then decreases, and the molten pool width always decreases with the increase of energy ratio. The effect of energy ratio on dual beam laser welding characteristics is mainly attributed to the variation of keyhole and molten pool flow pattern in the welding process.

Newport宣传-MKS新实验室计划
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中图分类号:TG456.7

DOI:10.3788/cjl201744.0302003

所属栏目:激光制造

基金项目:国家重点研发计划(2016YFB1102100)

收稿日期:2016-09-14

修改稿日期:2016-11-21

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作者单位    点击查看

马国龙:哈尔滨工业大学先进焊接与连接国家重点实验室, 黑龙江 哈尔滨 150001
李俐群:哈尔滨工业大学先进焊接与连接国家重点实验室, 黑龙江 哈尔滨 150001
陈彦宾:哈尔滨工业大学先进焊接与连接国家重点实验室, 黑龙江 哈尔滨 150001

联系人作者:马国龙(guolongma@163.com)

备注:马国龙(1987—),男,博士研究生,主要从事双光束激光焊接方面的研究。

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引用该论文

Ma Guolong,Li Liqun,Chen Yanbin. Effect of Energy Ratio on Dual Beam Laser Welding Characteristics[J]. Chinese Journal of Lasers, 2017, 44(3): 0302003

马国龙,李俐群,陈彦宾. 能量比对双光束激光焊接特性的影响[J]. 中国激光, 2017, 44(3): 0302003

被引情况

【1】牛振. 双金属锯带用钢的固体激光焊接. 激光与光电子学进展, 2017, 54(12): 121406--1

【2】王君涛,童立新,徐浏,吴振海,李密,陈小明,陈月健,汪丹,周唐建,胡浩,高清松. 5 kW Nd∶YAG端面抽运板条激光器及其光束质量提升. 中国激光, 2018, 45(1): 101003--1

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