Abstract
The upsetting process of cylindrical forging was investigated using finite element method. The influence of conical anvil on deformation rule of metal and distribution of strain and stress was studied using software MSC. Marc. The simulated results indicated that it had a smaller rigid zone and more homogeneous deformation zone in the billet during upsetting process with conical anvil compared with flat anvil. The critical reduction in height which could assure the three dimensional compressive stress states for the upsetting with conical anvil was smaller than that for the flat one.
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