汽车底板前横梁内板热成形工艺

The process difficulties in the hot forming process of the automotive base plate front cross member inner plate were studied. Based on the improvement of the conventional hot stamping process, the finite element model was established by the finite element simulation software Autoform to simulate the hot forming process of the automotive base plate front cross member inner plate. After analyzing different die structures and forming methods, it is found that when increasing the fillet radius of parts and the step hot stamping forming method is adopted, the maximum thinning rate of parts decreases to 0. 146 and the maximum thickening rate decreases to 0. 110, which successfully solves the problems of local wrinkling and cracking during the forming process of the automotive base plate front cross member inner plate. The mechanical properties and microstructure of the trial-produced parts were tested, and it is found that after step hot stamping, the microstructure is completely martensified and the tensile strength is 1350 MPa. The feasibility of the scheme was verified by the actual manufacturing of automotive base plate front cross member inner plate parts.