激光约束电弧熔丝增材制造构件表面粗糙度研究

Influences of laser constraining arc on part’s surface roughness in gas metal arc welding additive manufacturing

通过研究不同工艺参数下激光调控电弧的行为,发现激光可以压缩电弧,使得电弧稳定,激光对电弧有调控作用;进而分析不同工艺参数下激光对堆积层稳定性的影响以及激光约束电弧熔丝增材制造构件的表面粗糙度。研究发现相较于熔化极活性气体保护电弧焊(Metal Active Gas Arc Welding,MAG)作用而言,激光作用后,堆积层稳定性得到提高,并且小规范参数下,构件表面粗糙度Ra值由150.178μm降低到53.521μm;中等规范参数下,构件表面粗糙度Ra值由71.328μm降低到41.498μm;大规范参数下,构件表面粗糙度Ra值由110.163μm降低到82.352μm。

By studying the behavior of laser constraining arc under different process parameters,it was found that laser could decrease the size of arc,making arc more stable,so laser could constraint arc.The effects of laser to the stability of deposited layer under different process parameters were investigated,as well as the influences of laser constraining arc on part’s surface roughness in gas metal arc welding additive manufacturing.The results showed that the stability of deposited layer was improved by the effect of laser compared with Metal Active Gas Arc Welding(MAG).When specification parameters were small,the part’s surface roughness Ra value reduced from 150.178μm to 53.521μm.When specification parameters were moderate,the part’s surface roughness Ra value reduced from 71.328μm to 41.498μm.When specification parameters were big,the part’s surface roughness Ra value reduced from 110.163μm to 82.352μm.