激光焊接等离子体简化电流模型及应用  

Simple plasma current model and its application in laser beam welding

作　　者：王成[1] 陈武柱[1] 彭云[1] 包刚[1] 田志凌[2] 

机构地区：[1]清华大学机械工程系,北京100084 [2]北京钢铁研究总院,北京100081

出　　处：《清华大学学报（自然科学版）》2002年第4期488-490,共3页Journal of Tsinghua University(Science and Technology)

基　　金：国家"九七三"基础研究项目 ;清华大学"九八五"基金项目 ( 0 12 -10 10 5 0 )

摘　　要：等离子体控制是解决高功率激光焊接的关键技术。为完善对等离子体控制技术 ,对焊接过程中等离子体电流的形成进行了理论分析 ,并将等离子体导电过程简化等效为一个具有内阻的电源模型。采用 3 k W CO2 激光器在不同激光焊接规范下 ,依据测量得到的等离子体电流计算得到了等效电源电压和等效内阻。Plasma control is one of the key techniques for high power laser welding. The plasma current in laser beam welding was analyzed and a model that takes plasma as a power source with resistance was developed. The plasma current in a 3 kW CO 2 laser welding beam was measured experimentally to calculate the equivalent power source voltage and source resistance for different laser welding parameters. The plasma can be controlled by a magnetic field according to the model.

关 键 词：激光焊接 等离子体控制 电流模型 辅助磁场 

分 类 号：TG456.7[金属学及工艺—焊接]