A numerical study of the effects of roller paths on dimensional precision in die-less spinning of sheet metal

摘要: Die-less spinning eliminates the dependence upon mandrel of traditional spinning, but bringing about comparatively poor dimensional accuracy which needs to be improved. In this paper, roller paths in first pass die-less including concave, convex, linear and combined ones are parameterized according degree bending their effects on precision (thickness variation shape deviation) have been studied by using experiments finite element (FE) analysis. The thickness variation, deviation, tool forces, stress strain variations analyzed numerically. results showed that for concave paths, is not very sensitive bending, while a low path can result deviation. For convex leads both reduction Further research shows with convex-concave curve could contribute an inverse gives better precision.