High speed bullet train roof assembly and welding device

Disclosed is a high speed bullet train roof assembly and welding device, which belongs to the manufacture technique field of rail vehicle bodies. The device comprises two foundation beams in parallel, each foundation beam is composed of a plurality of segments having I-shaped across sections which are connected in series into one body by connecting both ends thereof through connecting pieces, and the bottom face thereof is fixedly connected with a connecting plate embedded in a foundation; and a plurality of fixed plates are disposed on the foundation beams, and a central positioning frame, a top positioning frame, a plurality of flat top holding frames, a round top holding frame and a plurality of pairs of fixture frames are disposed on the fixed plates. Based on sufficiently investigation and adoption on advantages of fabrication techniques of railway vehicles at home and abroad, the utility model breaks through the traditional model and innovates in structure, and can realize the manufacture of all five types of vehicle roofs of high speed bullet trains, the utility model utilizes the match of one set of tooling and a welding manipulator to meet the requirements of back and facade line welding of the vehicle roof at the same time; and the utility model also reduces the welding operation area, increases the factory building space utilization rate, saves money, greatly improves the work efficiency and reduces the labor intensity of operators while ensuring good welding quality.