STUDY ON THE PROCESS OF CTWW CO2 GAS SHIELDED WELDING
STUDY ON THE PROCESS OF CTWW CO2 GAS SHIELDED WELDING
复制标题
DOI：
10.3724/sp.j.1037.2012.00296
复制
发表时间：
2012-11
影响因子：
2.3
通讯作者：
Fang Chenfu Chen Zhiwei Xu Guoxiang Hu Qingxian Zhou Hangyu-Fang-Chenfu-Chen-Zhiwei-Xu-Guoxiang-Hu-Qingxian-116233785
中科院分区：
文献类型：
--
作者：
Fang Chenfu Chen Zhiwei Xu Guoxiang Hu Qingxian Zhou Hangyu-Fang-Chenfu-Chen-Zhiwei-Xu-Guoxiang-Hu-Qingxian-116233785
-.CO2，CO2 2.9，Co2 4 1.7；，CO2，抽象电缆式焊丝(CTWW)CO2气体保护焊是一种高质量、高效率、低消耗的新型弧焊工艺，在工业生产中具有广泛的应用前景。然而，到目前为止，对这一新的焊接技术还缺乏深入的研究，阻碍了它的推广。本文采用实验检测和数值模拟相结合的方法，对CTWW CO2气体保护焊的工艺机理进行了研究。利用电弧多信息采集系统，获得了CTWW CO_2气体保护焊焊接过程中的熔宽和行为特征。获得了无缺陷的焊缝照片。根据试验结果，解释了CTWW CO_2气体保护焊的焊接机理。建立了适合于CTWW CO2气体保护焊的有限元分析模型，模拟了焊接过程中的温度场和应力场分布。结果表明，CTWW CO2气体保护焊存在一种独特的束状电弧，它是由多弧旋转耦合形成的，导致了电弧的热集中；计算的焊缝截面与实验数据吻合较好，验证了所建立的热源模型的准确性。当单位长度的热输入是单丝CO2气体保护焊的2.9倍时，焊缝熔深和宽度分别是单丝CO2气体保护焊的4倍和1.7倍
- . , CO2 , , ; CO2 CO2 2.9 , CO2 4 1.7 ; , CO2 , ABSTRACT Cable-type welding wire (CTWW) CO2 gas shielded arc welding, which uses CTWW as consumable electrode, is an innovative arc welding process with high quality, high efficiency and low consumption, thus having significant potential of wide application in industrial manufacturing. So far, however, there is lack of deep study on this new welding technology, hindering its promotion. In this paper, the process mechanism of CTWW CO2 gas shielded arc welding is studied through combining the experimental detection and numerical simulation. By using arc multi-information collection sys- tem, the characteristics of ar cs hape and behavior in CTWW CO2 gas shielded arc welding process is acquired. The photographs of weld without defect are obtained. Based on the test results, the mechanism of CTWW CO2 gas shielded arc welding is explained. A finite element analysis model suitable to CTWW CO2 gas shielded arc welding is developed to simulate the temperature and stress field distribution. The results show that, there exist a unique bunchy electric arc in CTWW CO2 gas shielded arc welding, which is formed through multi-arc rotating and coupling, leading to arc heat concentration; the calculated weld cross section agrees well with the experimental data, validating the accuracy of established heat source model. When the heat input for per unit length in CTWW CO2 gas shielded arc welding is 2.9 times more than that in single welding wire (SWW) CO2 gas shielded arc welding, the weld penetration and width are 4 times and 1.7 times of those in SWW CO2 gas shielded