The figure above shows the digital pipe bending die for aircraft tube produced by zhejiang King-Mazon Machinery co., LTD., which can effectively control the non-damaging bending of aircraft thin-wall pipe. After forming, the precision of pipe geometry size is due to the standards of aviation industry. Due to its advantages such as high strength, light weight, easy to shape and beautiful appearance, the metallic thin-walled pipe has been widely used in the fields of aerospace aircraft, aerospace rockets, transport vehicles, ships and petrochemical industry. Among them, the space elbow makes the lightweight structure has the advantages of space saving and good aerodynamic characteristics.