摘要
窄间隙熔化极气保焊(NGGMAW)具有高效、节能的优点,广泛用于厚/超厚板材焊接,但其焊接过程易产生侧壁熔合不良、气孔、咬边等缺陷,严重制约焊接质量的提升。目前针对NGGMAW的研究大多采用试验方法,耗时长、成本高。本文在详细分析NGGMAW焊接机理的基础上,建立了电弧摆动NGGMAW焊接过程的动态仿真模型,并通过系统仿真,研究并分析了摆动频率这一工艺参数对焊接质量的影响,仿真结果显示可取得良好的侧壁熔合和焊缝成形。这为优化NGGMAW焊接工艺参数、发现新现象,提供了灵活高效的方法和依据。
Narrow gap gas metal arc welding( NGGMAW) was widely used to weld thick/extra thick plates for its high efficiency and energy saving, but it also had disadvantages such as poor sidewall fusion, porosity, undercut and so on, which restricted the enhance of welding quality. There were many researches about NGGMAW, but most of them were just analysis of welding experimental results, which was expensive and time consuming. On the basis of detailed analysis of NGGMAW, in this article builded a dynamic model of swing arc NGGMAW and studieed the effects of arc swing frequency on the welding results by MATLAB/SIMULINK tool. Simulation results showed that good sidewall fusion and weld formation could be achieved. This article provided a flexible and efficient method and basis for optimizing NGGMAW welding process parameters and discovering new phenomena.
出处
《焊接技术》
2016年第5期92-95,8,共4页
Welding Technology
基金
国家自然科学基金(61471372
51207083)
