Methods and results regarding sinusoid modulated pulse gas metal arc welding
Methods and results regarding sinusoid modulated pulse gas metal arc welding
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DOI：
10.1007/s00170-015-8267-8
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发表时间：
2016-01
期刊：
影响因子：
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通讯作者：
Leilei Wang;Gongchun Heng;Hui Chen;J. Xue;Fanglue Lin;Wenjin Huang
中科院分区：
文献类型：
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作者：
Leilei Wang;Gongchun Heng;Hui Chen;J. Xue;Fanglue Lin;Wenjin Huang
基于脉冲熔化极气体保护焊（P-GMAW）的焊接机理，提出了一种基于电流波形控制的正弦调制脉冲熔化极气体保护焊（SP-GMAW）焊接方法。该方法实现了对焊接电流的平滑控制。简化了工艺配方。对控制参数进行了讨论和优化。最后进行了三个对比实验。结果表明，SP-GMAW作为双脉冲熔化极气体保护焊（DP-GMAW）的改进方法，具有以下特点：SP-GMAW与P-GMAW相比，气孔率最小，焊缝波纹明显。在三种焊接方法中，SP-GMAW产生最细的熔合区晶粒、最高的熔合区显微硬度和最高的抗拉强度。验证了该方法在铝板焊接中的可行性和优越性。
In this investigation, a sinusoid modulated pulse gas metal arc welding (SP-GMAW) method based on a current waveform control method and on the welding mechanism of pulsed gas metal arc welding (P-GMAW) was proposed. This method achieved smooth control over the welding current. The process formulas were simplified. Then, the control parameters were discussed and optimized. Finally, three comparison experiments were conducted. The results indicated that the SP-GMAW method, as an improved double-pulsed gas metal arc welding (DP-GMAW) method, had the following features: The SP-GMAW minimized porosity rate and generated palpable weld ripples in contrast with the P-GMAW. The SP-GMAW produced the finest fusion zone grain, highest fusion zone microhardness, and highest tensile strength among three welding methods. The feasibility and superiority of the method for welding aluminum sheet were verified.