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基于减少CO2焊飞溅的目的,研究了磁控CO2气体保护焊接技术。探讨了外加磁场对电弧及熔滴过渡的作用机理,明确了所需的外加磁场分布。在此基础上,对不同截面形状绕线圈所产生的磁场分布进行了有限元模拟分析。结果表明,圆形截面绕线圈产生的磁场分布具有较好的轴向性,而方形线圈产生的磁场分布的径向性有所增强,因此励磁线圈应选用方形截面绕线圈。
Based on the purpose of reducing the CO2 welding spatter, the magnetron CO2 gas shielded welding technology was studied. The mechanism of the applied magnetic field on the arc and droplet transfer is discussed, and the necessary external magnetic field distribution is clarified. On this basis, the finite element simulation analysis of the magnetic field distribution generated by coils with different cross-sectional shapes was carried out. The results show that the magnetic field generated by the circular cross-section coil has a good axial distribution and the radial distribution of the magnetic field generated by the square coil is enhanced. Therefore, the square coil should be used as the exciting coil.