焊接坡口一般采用铣、刨、铲、磨等机械加工方法。近年来随着对火焰切割加工焊接坡口工艺的精心研究、高精度门式气割机(Flame Planner)和数控气割机的出现,专门用于坡口切割的三割炬装置的不断改进以及新型割嘴的研制,使坡口的加工方法出现了巨大变化。当今在先进国家中,作为一项成熟的工艺,火焰切割替代机械加工不仅在实际生产中已经实现,并且已经越来越明显地形成一种 Welding groove generally used milling, planing, shoveling, grinding and other mechanical processing methods. In recent years, with the careful study of flame cutting process of welding bevel process, the emergence of high-precision Flame Planner and CNC gas cutting machine, the continuous improvement of the three torch device for bevel cutting and the new cutting Mouth development, the bevel processing methods have undergone tremendous changes. In today’s advanced countries, as a mature process, alternative flame cutting machining not only in the actual production has been achieved, and has become more and more obvious to form a