Application and development of friction stir welding technology in high speed EMU manufacturing

The application status of friction stir welding technology is introduced, and the application research of advanced FSW technology in the manufacture of high-speed electric multiple unit aluminum alloy body is analyzed, including the application of traditional friction stir welding technology to a combination of a lap joint and butt joint, and butt joint of large thick plate by both sides process, also introduces bobbin-tool friction stir welding to a butt joint and three-dimensional space curved friction stir welding to T-joint. At the same time the future development trend of new FSW technology derived from traditional FSW technology in rail vehicle manufacturing industry is put forward. As the fast developing of critical technology used on railway vehicles, quick applying advanced welding technology will affect products quality, manufacturing cost and production cycle time directly, and it certainly will be one of the approaches to develop markets by all the railway vehicles manufacturing enterprises.