科研之友
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摘要
This study investigates the characteristics of asymmetric multi-pass spinning for angled-flange cylinders. The roller movement and the mandrel rotation are controlled by a CNC spinning lathe to form an asymmetric shape. A set of roller passes was designed to achieve the oblique cylindrical shape with a planar flange. The effects of key parameters on the thickness distribution such as equivalent feed ratio f, clearance between roller and mandrel delta and transitional distance Delta beta are investigated. The product has a non-uniform thickness distribution. delta has a great influence on the uniformity of wall thickness distribution. A larger Delta beta and a smaller f can improve the uniformity of wall thickness distribution. Two types of fracture are observed during experiments, fracture on the wall and fracture on the flange. Forming limit experiments with various parameters are carried out. The depth limit achieved in this study is low compared to conventional spinning. The limit of flange inclination angle theta achieved in this study is 21(degrees).
