异厚异质铝合金超薄板激光焊接工艺试验研究  

Experimental Study on Laser Welding Technology of Ultra-Thin Aluminum Alloy Plate with Different Thickness and Heterogeneity

作　　者：文梦蝶 陈苗苗 陈素[1] 张大斌[1] WEN Meng-die;CHEN Miao-miao;CHEN Su;ZHANG Da-bin(School of Mechanical Engineering,Guizhou University,Guizhou Guiyang 550000,China)

机构地区：[1]贵州大学机械工程学院,贵州贵阳550000

出　　处：《机械设计与制造》2023年第8期76-79,共4页Machinery Design & Manufacture

基　　金：贵州省科技计划项目(黔科合平台人才[2019]5616号)。

摘　　要：激光焊接是实现手机用异厚异质铝合金超薄板连接的有效方法,但未焊透或易焊穿等频发问题严重降低焊接质量。以0.18mm厚的3系和0.4mm厚的5系铝板为焊接对象,采用单因素定量分析方法研究激光功率、焊接速度和离焦量对焊件剪切力和焊缝质量的影响规律,结果表明焊件剪切力、焊缝质量均与激光功率呈正相关关系,与焊接速度呈负相关关系;相较于正离焦,采用负离焦能够获得更高的焊件剪切力,且焊件剪切力随负离焦量(0~0.25)mm增大而增加。通过正交试验和极差分析方法,发现离焦量是影响异厚异质铝合金超薄板激光焊接的关键因素;当激光功率、焊接速度和离焦量分别为245W、275mm/s、-0.25mm时,可以获得力学性能优越、成形良好的接头。Laser welding is an effective method to realize the connection between mobile phones and ultra-thin aluminum alloy plates with different thicknesses and heterogeneity,but frequent problems such as incomplete or excessive penetration seriously reduce the welding quality.Taking 0.18mm thick 3-series and 0.4mm thick 5-series aluminum plates as welding objects,the effects of laser power,welding speed and defocusing amount on welding shear force and weld quality were studied by single factor quantitative analysis method.The results show that welding shear force and weld quality are positively correlated with laser power and negatively correlated with welding speed.Compared with positive defocus,negative defocus can obtain higher shear force of weldment,and the shear force of weldment increases with the increase of negative defocus amount(0-0.25mm).Through orthogonal test and range analysis,it can be observed that defocus is the hey factor affecting laser welding of ultra-thin aluminum alloy plates with different thickness and heterogeneity When the laser power,welding speed and defocus are 245W,275mm/s and-O.25mm respectively,the joint with superior mechanical properties and good forming can be obtained.

关 键 词：铝合金超薄板 激光搭接焊接 异厚异质 焊接质量 工艺试验 

分 类 号：TH16[机械工程—机械制造及自动化] TG456.7[金属学及工艺—焊接]