等离子弧焊接在国内外都已开始广泛应用,经常遇到的技术问题之一,就是如何简便有效地调节焊枪中钨极与喷咀的对中。由于焊枪结构比较复杂,从钨极到喷咀中间要经过绝缘和几个零件的连接,如果只靠焊枪加工装配来保证钨极与喷咀的同心是比较困难的。况且钨 Plasma arc welding has begun to be widely used both at home and abroad. One of the frequently encountered technical problems is how to adjust the centering of the tungsten electrode and the nozzle in the welding torch conveniently and effectively. Due to the torch structure is more complex, from the tungsten to the middle of the nozzle to go through the insulation and the connection of several parts, if only by torch processing and assembly to ensure the concentric tungsten and nozzle is more difficult. Moreover, tungsten