A study of stress and strain distributions of first pass conventional spinningunder different roller-trace

摘要

In this paper, based on the establishment of a reasonable mechanics model for a typical draw-spinning,rnresearch on the first pass of spinning process is carried out with an elasto-plastic FEM method. The distributionsrnof the stress and strain are obtained under three types of roller-trace curves: straight lines, involute curves andrnquadratic curves. The distribution laws of radial and tangential stress obtained can serve as a significant guide torndetermining the forming limits in multi-pass conventional spinning under different roller-traces. Comparison ofrnthe distributions of strain and stress of three roller-traces could provide a theoretical basis for selecting arnreasonable roller-trace in multi-pass conventional spinning.