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前言近来,日本发展了各种单侧焊接方法以提高焊接效率和使操作合理化,并已在许多工业部门获得了实际应用。作者曾在 X11—B87—71文献中发表过关于新发展的单侧电弧焊方法。NOW 焊接法(单侧窄间隙电弧焊)适于建筑钢结构的室内焊接。这种方法是在Ⅰ—型对接接头中放进特殊的涂料焊条,钢板的背面采用熔剂垫,在平焊位置单侧焊接。依靠涂料焊条和熔剂垫的作用,使背面成形良好。建筑钢结构进行现场横焊时,经常采用
Preface Recently, Japan has developed a variety of unilateral welding methods to improve welding efficiency and rationalize operation, and has been practically used in many industrial sectors. The author has published in the X11-B87-71 literature on the new development of the unilateral arc welding method. NOW welding method (one side narrow gap arc welding) is suitable for indoor welding of building steel structures. In this method, a special coating electrode is placed in the I-type butt joint, the flux pad is used on the back of the steel plate, and one side of the flat welding position is welded. Rely on the role of paint electrodes and flux mat, the back of a good shape. Construction of steel structures on-site horizontal welding, often used