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环保焊枪吸烟对小电流CO2气体保护电弧焊的影响
黄勇1,2, 张佳杰1,2, 冉小龙1,2, 毛宇3
1.兰州理工大学 省部共建有色金属先进加工与再利用国家重点实验室, 兰州 730050;2.兰州理工大学 有色金属合金及加工教育部重点实验室, 兰州 730050;3.济南诺斯焊接辅具有限公司, 济南 250000
摘要:
采用环保焊枪进行了小电流二氧化碳气体保护电弧焊平焊位置焊接,通过分析焊接过程中电弧形貌、电流电压和熔滴过渡方式变化以及焊缝成形、焊缝金属拉伸力学性能和X射线探伤结果,评估了吸烟功率变化时的吸烟效果以及吸烟行为对于焊接过程和焊缝质量的影响规律. 结果表明,使用环保焊枪可以显著降低小电流二氧化碳气体保护电弧焊时飘散在周围空间中的焊接烟尘. 吸烟过程虽然使得短路过渡熔滴频率略有增加,悬挂熔滴和电弧的稳定性略为变差,但对焊缝成形和焊接缺陷都无影响,焊缝金属屈服强度略有减小,抗拉强度略有增加.
关键词:  环保焊枪  二氧化碳气体保护电弧焊  短路过渡  焊接过程  焊接品质
DOI:10.12073/j.hjxb.2019400315
分类号:TG433
基金项目:国家自然科学基金资助项目(51265029)
Influence of extraction fume by environmental welding torch on low current CO2 gas shielded arc welding
HUANG Yong1,2, ZHANG Jiajie1,2, RAN Xiaolong1,2, MAO Yu3
1.State Key Laboratory of advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, China;2.Key Laboratory of Non-ferrous Metal Alloys and Processing. Ministry of Education, Lanzhou university of Technology, Lanzhou 730050, China;3.Jinan North Welding Tools Co., Ltd., Jinan 250000, China
Abstract:
Using environmental welding torch, low current CO2 gas shielded arc welding at flat position was carried out to analyze the change of arc shape, current and voltage, the droplet transfer and weld formation, weld metal tensile mechanics and X-ray radiographic inspection. Fume extraction effect and its influence on welding process and weld quality were evaluated. The results showed that using environmental welding torch is able to dramatically low down the welding fume diffusion to the environment during the low current CO2 gas shielding welding. It will not impact the shape of weld or cause welding defects, although the frequency of droplet transfer of short circuit transition is slightly quickened, the stabilities of suspend droplet and arc get a little worse. The yield strength of weld is slightly decreased, while the tensile strength is slightly increases.
Key words:  environmental welding torch  carbon dioxide gas shielded welding  short circuit transition  welding process  weld quality