| With the development of the auto industry, the important development directions of motor structure, performance and technology are reducing weight, saving energy, increasing security and reducing emissions, achieving lightweight car body is one of the important means to achieve this goal. The forming technology of tailor rolled blanks (TRB) came into being at the request of lightweight vehicles, designed to reduce weight, lower fuel consumption and reduce environmental pollution and other issues. Although the research of TRB has just started, it is still not mature enough in the production, manufacture and forming areas, but it plays a key role at the study on the lightweight vehicles, displays a tempting prospect, and this study has great significance. Based on this, this paper made a research of a new plate—TRB, which reduces the weight of vehicle body significantly and the application of which will bring substantial progress to automobile industry.In this paper, the square box with TRB as the object to study, applied the methods of numerical simulation and orthogonal optimization, revealed the formability of square box with TRB in different forming parameters by numerical simulation. This study will provide a basal condition for the wider application of auto panels with TRB, and can improve the stamping formability of TRB effectively. The main researches are as follows.1) First of all, this paper revealed the research background, forming characteristics and study status of TRB, focused on the introduction of the application of TRB in the auto industry, reviewed the box-shaped drawing studies in domestic and foreign, then guided the drawing research of square box with TRB; 2) This paper displayed the drawing theoretical of the box-shaped, paid more attention to the analysis of the forming characteristics and the forming mechanism, analyzed the forming mechanism and the forming defects of square box with TRB, then provide a theoretical basis for square box with TRB, auto panels or structural parts during the forming research; 3) This study introduced the general process of numerical simulation on square box with TRB based on the finite element software of ABAQUS, established the finite element model, then analyzed the speed of punch in order to confirm it. All of which provided simulation basis for the forming of square box with TRB; 4) Through the stamping analysis of square box with TRB, revealed the impact on square box in different forming parameters, such as the blank holder force (BHF), the sheet thickness ratio, the die radius, as well as the shape and size of bank, through the comparative study of the movement of transitional zone, forming depth, strain paths and thick-strain of sheet metal; 5) The optimization study on the stamping formability of square box with TRB. This paper introduced the optimization technology of orthogonal design, based on the factors of BHF, sheet thickness ratio, die radius, shape and size of blank, then optimized the Stamping of square box with TRB, enhanced its formability and provided reliable basis for the selection of forming parameters of square box with TRB; 6) Finally, the summary and the further research work of this paper were proposed. |
