Research and Development of Friction Stir Welding Equipment for Tubular Busbar

In order to solve difficult welding problem of tubular busbars, based on the forming principle of friction stir welding, we designed and developed a friction stir welding equipment for tubular busbars independently. The equipment uses the working mode of integral rotation of the welding tool to weld the annular seam on the YOZ plane of the tubular busbar with high efficiency, and a clamping device with adjustable pipe diameter, a welding seam ending mechanism that can eliminate the key hole at the tail, and a pressure control system with dynamic adjustment of the relative reduction were developed. At the same time, a stable and cheap translation shaft was designed to replace the complex and expensive rotating shaft to meet the requirements of the inclination welding process. Combined with auxiliary mechanisms such as guide rollers and pressing rollers of the equipment, the tubular busbar can be formed with high quality under the combined action of heat and pressure. The experimental test shows that the functions of each system of the equipment are clear and coordinated with each other, and the welding pressure can reach up to 10000 kN, which provides reliable support for the research on the friction stir welding process of the tubular busbar.