As a novel solid-state joining method, the advent of friction stir welding has brought about revolutionary progress in the joining of aluminum alloys. Friction stir welding can join nearly all aluminum alloys (including 2000, 7000, and 8000 series, as well as dissimilar aluminum alloys), while offering advantages such as high weld quality, high joint strength, and minimal distortion. The friction stir welding (FSW) tool, as one of the core technologies of FSW, is often referred to as the “heart” of the process. It is also a specialized consumable in FSW. To accommodate different aluminum alloy materials, Aerospace Engineering Equipment (Suzhou) Co., Ltd. has developed standard FSW tools designed for aluminum alloy friction stir welding, catering to various thicknesses and structural configurations.