BX型交流弧焊机具有运用灵活、使用方便、操作自如等优点。对于完成复杂形状的焊缝、狭窄场合下的焊缝、高空结构的焊缝及临时连接点、磨损零件的局部堆焊与修补等的焊接工作,尤为适宜。但对大型钢结构件连续焊接时,BX型交流弧焊机(简称焊机)螺母易脱落,造成焊机不能调节电流。我厂现使用的40多台焊机,几乎都存在这样的问题,严重地影响了生产进度和焊接质量。 针对这一情况,我们通过多方面的调查研究,认为是该焊机螺母设计结构(见图1)存在一定不足。由于焊 BX AC arc welding machine with flexible, easy to use, easy to operate and so on. Particularly suitable for the completion of the complex shape of the weld, the weld under the narrow occasions, the weld height and the temporary connection points, wear and tear parts of the local welding and repair work is particularly suitable. However, continuous welding of large steel structures, BX AC arc welding machine (referred to as the welder) is easy to fall off the nut, causing the welding machine can not adjust the current. My factory is now using more than 40 Taiwan welding machine, almost all such problems exist, a serious impact on the production schedule and welding quality. In view of this situation, we through a wide range of investigations and studies, that the design of the structure of the welder nut (see Figure 1) there is a certain lack of. Due to welding