On the conventional simple spinning of cylindrical aluminium cups

Abstract

In this work, a study into the conventional simple spinning of cylindrical aluminium cups was carried out. The effects of roller face angle, feed rate and roller nose radius on each of wall thickness variation, cup inner diameter uniformity, spinning ratio, roundness uniformity, surface roughness, and spinning forces during simple spinning under dry conditions were investigated. Theoretical relationships for axial and radial components of the spinning force are determined and their validity is experimentally examined. The results show that decreasing both roller angle and feed rate, and increasing roller nose radius improve most of the spinning characteristics of the spun cup for the range of parameters considered. The results could be interpreted in terms of temperature rise in the deformation zone, over-rolling and spring-back phenomena, spinning forces, and the variations of contact area between the roller and the spun metal.