Only when the simulation model complies with the similar conditions of plastic deformation can the simulation results of plastic forming be consistent with the actual situation.The similar conditions of plastic deformation include geometric similarity,mechanical similarity and physical similarity.The treatment of these similar conditions in FEM forming simulation is discussed.The plastic forming conditions of steel ingot upset with forming force of 150MN,140MN,130MN and 120MN were calculated respectively,and 130MN press was selected according to the calculation results and comprehensive consideration.Then the press is used to calculate the billet 2,billet 3and billet 4 upsetting forming,and the results of rapid upset-ting in 50s and the final upsetting are counted.The simulation results can show the correlation between bil-let height and upsetting forming time,and provide technical support for press design and manufacture.
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