Automatic welding and pressing device and method for large-diameter tapping weld joint of end socket

The invention discloses an automatic welding and pressing device and method for a large-diameter tapping weld joint of an end socket. The device comprises a fixed beam, a lifting and pressing mechanism and an independent rotating shaft. The fixed beam is mounted on a suspended welding system platform through bolts; wherein the fixed beam is mutually independent from a rotary mould arranged on a suspended welding system platform, and the rotary mould is used for fixing a workpiece to be welded; the lifting pressing mechanism is installed on the fixed beam through an independent rotating shaft. By means of the automatic TIG suspension welding method, automatic TIG suspension welding of large-diameter opening welding seams of the pressure vessel end socket and the carrier rocket storage tank bottom is achieved. 本发明公开了一种封头大直径开孔焊缝的自动焊压紧装置和方法，装置包括：固定梁、升降压紧机构和独立旋转轴；固定梁通过螺栓安装在悬空焊系统平台上；其中，固定梁与设置在悬空焊系统平台上的旋转膜胎相互独立，旋转膜胎用于固定待焊接工件；升降压紧机构通过独立旋转轴安装到固定梁上。通过本发明实现了压力容器封头和运载火箭贮箱箱底大直径开孔焊缝自动TIG悬空焊。