Robust Design Of The Springback Of TRB S-RAIL Beam

Depletion of oil resources and atmospheric pollution call for much more stringent requirements on the car’s fuel consumption and exhaust emissions, in order to survive and develop the auto industry has to innovate technologies to deal with energy shortages and continuously raised emission standards. The lightweight is the most realistic means of coping with this challenge. As a new lightweight automotive sheet structure, tailor rolled blank gains more favor than TWB(tailor welded blank) from auto industry for its better forming capacity and product quality, from which derived load adapted continuous thickness change. However, as a new technology in the near, the mold design, material behavior and shape evaluation of many aspects of the TRB is still in the exploratory stage. This article is just working on solving these problems. Based on the achievement of the numerical simulation modeling of the stamping and failure evaluation of the TRB, the robust design method is used for optimizing parameters affecting the springback of beam. The paper focuses on two core points: the numerical simulation modeling of the stamping of the TRB and the robust design. First this article verifies the correctness and feasibility of the numerical simulation modeling of the stamping of the TRB by the simulation of uniaxial tensile test, then gives a detailed introduction on construction method of the numerical simulation modeling of the stamping of the TRB, and respectively analyses three factors that affect the rebound of the beam:fixed blank holder force, thickness ratio and location of thickness transition zone, select their optimal value for using of robust design, finally based on previous work carries out optimization analysis of the robust design of the springback of TRB S-RAIL beam.The robust design of the springback of TRB S-RAIL beam based on the second order response surface approximation model, takes into account both the tailor rolled blank this latest lightweight technology and robust design method, proposes the method of numerical modeling of TRB and the process of robust design which are bound to be promoting and guiding function for the concept design, mold design and crafts of TRB automobile body and structure.