In order to reduce or eliminate residual stress and improve dimensional accuracy and stability of aluminum alloy thin-walled cylindrical parts

the compression plastic mini-deformation process exerted on the blank made by hot extrusion process was adopted.The process experimental results show that when the deformation rate exerted on the blank is more than 1%

the dimesional accuracy of aluminum alloy thin-walled cylindrical parts can be improved significantly

while the deformation rate exerted on the blank is more than 2%

the roundness tolerance variation of aluminum alloy thin-walled cylindrical parts can tend to be stable.The compression plastic mini-deformation process is one of both effective and convenient process for improving dimensional accuracy and stability of aluminum alloy thin-walled cylindrical parts in actual production.