【摘要】 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。更多还原

【Abstract】 Based on the purpose of reducing CO2 welding spatter,magnetic control technology in CO2 gas shield welding was studied.The action mechanism of externally-applied magnetic field on the welding arc and droplet transfer was explored,and the magnetic field distribution required was defined.On the basis,the magnetic field distribution produced by coils with different section shapes was analyzed by finite element simulation.The results show that the magnetic field distribution produced by circular section coil has better axial property,and the magnetic field distribution produced by square section coil has better radial property,therefore,the square section coil should be selected as excitation coil.更多还原