兰州理工大学学报

兰州理工大学学报 ›› 2021, Vol. 47 ›› Issue (6): 21-25.

• 材料科学与工程 • 上一篇    下一篇

吸烟焊枪在药芯焊丝CO2气保焊中的作用

黄勇*1,刘宏宇1,毛宇2,张佳杰1,王路玮1   

  1. 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, 甘肃 兰州 730050;
    2.济南诺斯焊接辅具有限公司, 山东 济南 250000
  • 收稿日期:2021-05-11 出版日期:2021-12-28 发布日期:2021-12-28
  • 通讯作者: 黄勇(1972-),男,四川绵阳人,教授.Email:hyorhot@lut.edu.cn
  • 基金资助:
    国家自然科学基金(51265029)

Effect of fume extraction torch in CO2 gas shielded arc welding with flux-cored wire

HUANG Yong1, LIU Hong-yu1, MAO Yu2, ZHANG Jia-jie1, WANG Lu-wei1   

  1. 1. State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou Univ. of Tech., Lanzhou 730050, China;
    2. Jinan North Welding Tools Co. Ltd., Jinan 25000, China
  • Received:2021-05-11 Online:2021-12-28 Published:2021-12-28

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摘要： 采用吸烟焊枪进行药芯焊丝CO2气保焊,通过记录烟尘扩散形态和焊接电流电压变化,采用高速摄像分析熔滴过渡过程,以及对比焊缝表面成形和采用X射线探伤揭示焊缝缺陷,并与未吸烟时对比,研究了不同吸烟功率和焊枪倾角下吸烟焊枪的吸烟行为及其对焊接过程和焊接质量的影响. 结果表明:焊接烟尘被有效吸入吸烟焊枪,其烟尘扩散形态整体呈锥形,并随吸烟功率的增加,其气流挺度增加,吸尘效果增强. 熔滴过渡仍表现为大滴排斥过渡,吸烟只是使熔滴过渡频率稍有增加. 采用不同功率以及焊枪倾角,均能得到表面成形良好和无缺陷的焊缝.

关键词: 吸烟焊枪, 药芯焊丝, 二氧化碳气保焊, 烟尘, 熔滴过渡

Abstract: Fume extraction torch was adopted to complete CO2 gas shielded arc welding with flux-cored wire. Through recording fume diffusion pattern and change of welding current and welding voltage, analyzing droplet transition form by high-speed camera, comparing appearance of welds and revealing the weld defects by X-ray non-destructive testing technology, and comparing them with the situation without fume extraction, the performance of fume extraction torch under different fume extraction powers and torch inclination angles and its influence on welding process and welding quality are studied. The results show that welding fumes are effectively absorbed into fume extraction torch, the overall shape of the fumes is conical, and as the increase of fume extraction power, its stiffness increases and the effect of fume extraction is enhanced. The droplet transition form still appears as repelled globular transfer, and fume extraction only slightly increases the droplet transition frequency. Under different powers and given torch inclination angles, the welds are well formed and there are no defects in welds.

Key words: fume extraction torch, flux-cored wire, CO2 gas shielded arc welding, fumes, droplet transition

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