The invention relates to an
assembly welding tool device and method commonly used for large curved surface end sockets of pressure containers. The
assembly welding tool device comprises a supporting base plate, a
ball screw, grouped rolling bearings, a movement air cylinder, external locating blocks, internal locating blocks, a manual rocker and a graduated scale, wherein the
ball screw and an executive component drive most of the external locating blocks and most of the internal locating blocks to move along guide rails of the supporting base plate so as to carry out integrated locating clamping fixation on the curved surface end sockets. According to the
assembly welding tool device and method commonly used for the large curved surface end sockets of the pressure containers, in the manufacturing process of the pressure containers, tool locating of the large end sockets can be achieved,
welding deformation is prevented, the curved surface end sockets are placed on the assembly welding tool device to be clamped in an assembly locating mode, spot fixation is carried out on weld joints, and then welding operation is carried out on the internal weld joints and the external weld joints; after welding is accomplished, the curved surface end sockets are naturally cooled to have the normal temperature, postwelding is carried out on the curved surface end sockets,
stress relieving is carried out on the curved surface end sockets, labor intensity of workers is reduced, the production and manufacturing cycle of products is shortened, and the production cost is reduced.