Hot Stamping of High Strength Steel Sheet and Its Numerical Simulation
The hot stamping technology of high strength steel sheet was introduced and the FE model of the B pillar was built.Through the thermo-mechanical coupling analysis,the temperature and thickness distribution of the blank was obtained.The results show that the thickness distributions of sections are basically within ±5% of the experimental results.The maximum thickness thinning lies in tail round corner.The temperature in the holding area of the blank is lower than that in the tail round corner and beam.The temperature range of the whole blank is about 400 ℃.Therefore,to maintain uniform temperature distribution of the blank is crucial for the cooling system design of the die.