压力容器以焊接为制造工艺的核心,尤其是换热器管板焊接的质量好坏直接影响它的使用、寿命与安全。管板焊接头要求具有一定的熔深和承受相当的内压,不允许介质有任何泄漏。管口不得咬边,且要求焊缝均匀平整、圆滑过渡,因而手工电弧焊很难达到这些要求。再加上管板接头管桥尺寸小,给操作带来的难度更大。同时 Pressure vessel to welding as the core of the manufacturing process, especially the heat exchanger tube plate welding quality directly affects its use, life and safety. Tube plate welded joints require a certain depth of penetration and withstand considerable pressure, does not allow any media leakage. Pipe mouth not undercut, and require uniform smooth welds, smooth transition, so manual arc welding is difficult to meet these requirements. Coupled with the tube plate connector bridge size is small, to the operation more difficult. Simultaneously