在手工电弧焊时一般用单根焊条作为熔化电极。为了提高焊工的工作效率,作者推荐束状焊条:两根焊条在两处用卡箍束住并焊在棒上,(如图)。 使用束状焊条时,电弧依次引燃,此时一根焊条散发在周围空间的能量部分加热了另一根焊条的端部,这样可以省电。同时另一焊条因其中没有电流而冷却,这样就能在大电流下工作时不致使焊条药皮过热。另外,缩短了焊条往焊钳内的安装时间和焊条残头的取出时间,还可以进一步提高劳动生产率。 In the manual arc welding generally use a single electrode as a melting electrode. In order to improve the work efficiency of the welder, the authors recommend a bundle of electrodes: two electrodes are bundled with two clamps and welded to the rod, as shown in the figure. When using a bundle of electrodes, the arcs in turn ignite, where an electrode dissipates energy in the surrounding space and heats the end of the other electrode, saving power. At the same time, the other electrode is cooled by the lack of current in it, so that it will work without overheating of the electrode coating at high currents. In addition, the welding rod to shorten the installation time and welding rod residual removal time, but also can further improve labor productivity.