光纤激光工艺参数对Q235钢穿透点焊缝形状和尺寸的影响  

Influence of fiber laser process parameters on the shape and size of penetration spot weld of Q235 steel

作　　者：李世康 童金钟 韩红彪[1] 李梦楠 Li Shikang;Tong Jinzhong;Han Hongbiao;Li Mengnan(Henan University of Science and Technology,Luoyang 471003,Henan,China;Sinopec Huabei Oilfield Service Corporation,Zhengzhou 450006,China)

机构地区：[1]河南科技大学,河南洛阳471003 [2]中石化华北石油工程有限公司,郑州450006

出　　处：《焊接》2023年第2期1-7,共7页Welding & Joining

基　　金：国家自然科学基金资助项目(51375146);国家智能制造综合标准化项目(2018ZNZX01-02);河南省高等学校重点科研项目(17A460012)。

摘　　要：为了研究光纤激光工艺参数对穿透点焊缝形状和尺寸的影响,采用单因素试验方法,进行了不同激光功率、摆动幅度和焊接时间下的穿透点焊试验,分析了激光的功率密度分布、点焊缝的形状和尺寸的变化规律。结果表明,光纤激光光斑内的功率密度分布影响点焊缝的形状和尺寸。随着激光功率的增大,未摆动高斯光束形成点焊缝的形状由抛物线状逐渐转变为钟铃状,点焊缝的熔宽、熔深、深宽比和熔宽比都随之增大。光束摆动增大了激光与材料的作用面积,改变了功率密度分布和点焊缝的形状和尺寸。随着摆动幅度的增大,点焊缝的形状由钟铃状逐渐转变为碗盆状,点焊缝的熔深和深宽比都逐渐减小而熔宽比逐渐增大。当激光功率密度不变时,焊接时间对点焊缝的形状影响不大。随着焊接时间的增大,点焊缝的熔深和熔宽都逐渐增大,但深宽比基本保持不变。In order to study the influence of fiber laser process parameters on the shape and size of the penetration spot weld,the single factor test method was used to conduct the penetration spot welding under different laser power,wobble amplitude and welding time.The power density distribution of laser and the shape and size of the spot weld were analyzed.The results show that the power density distribution in fiber laser spot affects the shape and size of spot weld.With the increase of laser power,the shape of spot weld formed by non-oscillating Gaussian beam gradually changes from parabolic shape to bell shape,and the weld width,weld depth,depth-to-width ratio and fusion width ratio of spot weld increase accordingly.The wobble of light beam increases the interaction area between laser and material,changes the power density distribution and the shape and size of spot weld.With the increase of wobble amplitude,the shape of spot weld gradually changes from bell shape to bowl shape,and the weld depth and depth-to-width ratio of spot weld gradually decrease while the fusion width ratio increases.Since the laser power density is basically unchanged,the welding time has little effect on the shape of spot weld.With the increase of welding time,the weld depth and weld width of spot weld gradually increase,but the depth-to-width ratio remains roughly the same.

关 键 词：光纤激光 穿透点焊 激光功率 摆动幅度 焊接时间 

分 类 号：TG456[金属学及工艺—焊接]