Laser-Enhanced Ar-GMA Welding
Laser-Enhanced Ar-GMA Welding
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DOI：
10.2207/qjjws.33.63s
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
Terumi Nakamura
中科院分区：
文献类型：
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作者：
Terumi Nakamura
使用光纤激光器使用纯 Ar 保护气体 (Ar-GMA) 实现稳定的自耗电极焊接。 Ar-GMA 焊接会在焊丝尖端产生长柱液态熔融金属 (CLM)，从而导致不规则短路和不稳定电弧。 CLM 的长度必须保持较短，以确保焊接稳定。我们开发了一种利用光纤激光器切割 CLM 的方法。我们研究了无电弧冷丝切割条件以及使用脉冲峰值功率为 6.0 kW、峰值脉冲时间为 10 ms 的光纤激光器的切割条件。我们的实验表明，在线材上的激光照射位置对于实现稳定切割至关重要，这主要是因为反冲压力使 CLM 弯曲。在确定切割 CLM 的最佳照射位置后，进行了激光增强 Ar-GMA 焊接。可以实现稳定的焊接并获得良好的接头。
A fiber laser was used to achieve stable consumable-electrode welding with pure Ar shielding gas (Ar-GMA). Ar-GMA welding produces a long column of liquid molten metal (CLM) at the wire tip, which causes irregular short-circuit and an unstable arc. The length of the CLM must be kept short to ensure stable welds. We have developed a method for cutting the CLM by means of a fiber laser. We investigated the cutting conditions for cold wire without an arc and the cutting conditions using a fiber laser with a pulse peak power of 6.0 kW and peak pulse time of 10 ms. Our experiments revealed that the laser irradiation position at the wire was crucial for achieving stable cutting, mainly because the recoil pressure force bends the CLM. After determining the optimum irradiation positions for cutting the CLM, laser-enhanced Ar-GMA welding was carried out. Stable welding was possible and excellent joints were obtained.