Research on Precision Bending Forming Process of Ultra-high-strength Steel Plates
In order to solve the problems of spring back,cracking,poor dimensional accuracy and inconsistency of blending of ultra-high-strength steel plates in the manufacture of special vehicle bodies,the material mechanical performance data were obtained through material performance experiments such as tensile compression experiments,notch tensile frac-ture experiments and so on.The parameters of the material constitutive model were calibrated,and a database of ultra-high strength steel plate material parameters and a numerical simulation platform for bending forming were constructed.By com-bining the finite element simulation platform,it was achieved that the simulation prediction of the V-shaped free bending forming,rebound process,and fracture of ultra-high strength steel under different punch pressing amounts.The reliability of the simulation results was more than 90％compared with the actual production,which verified that the effectiveness of the numerical simulation platform and provided a basis for the enterprise to improve the production efficiency.
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