Effect of laser-induced plume on welding process during high power fiber laser welding - Details

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Abstract：

The　plate　welding　experiment　is　carried　out　by　IPG　YLS-600　fiber　laser.　The　effect　of　plume　is　observed　by　a　high　speed　camera,　and　measuring　the　weld　width　and　penetration　as　the　plume　height　is　controlled　by　using　the　supersonic　cross　jet　at　different　heights　during　bead-on-plate　welding.　The　results　show　that　the　plume　can　be　divided　into　two　parts:　a　randomly　fluctuating　plume　out　of　the　keyhole　and　a　slender　plume　similar　to　the　focused　laser　beam.　The　weld　penetration　and　width　have　an　improvement　of　about　20%　and　a　decrease　of　about　24%,　respectively,　as　the　rising　of　plume　is　controlled　by　applying　a　cross　jet　at　5　mm　height　during　welding.　And　the　stability　of　the　welding　process　and　the　appearances　of　the　weld　seam　are　also　greatly　improved.　Further　analysis　indicates　that　the　effect　nature　of　plume　on　the　fiber　laser　is　the　effect　of　particles　in　plume　on　the　fiber　laser,　which　results　in　a　significant　effect　on　the　welding　process.

Keyword：

Welds Laser beam welding Supersonic aerodynamics Particles (particulate matter) High speed cameras Absorption Fibers Fiber lasers Laser beams Electric welding

Author Community：

[ 1 ] [Zou, Jianglin]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 2 ] [Li, Fei]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 3 ] [Niu, Jianqiang]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 4 ] [Kong, Xiaofang]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 5 ] [Ma, Ran]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China
[ 6 ] [Xiao, Rongshi]Institute of Laser Engineering, Beijing University of Technology, Beijing 100124, China