The Structure Optimization And Forming S Pringback Analysis Of S-type Leaf Spring With Cambered Surface

The security of car is becoming more and more important with car more and more popular in society. Blown tire is one of the automobile safety problems.In order to solve the problem,more and more Safety ties or Non-Pneumatic Tires are used in the market,but the two ties have the limitations of its application. Based on Security ties and Non-Pneumatic Tires, some scholars proposed a new conception of the tie named plate spring tie. This paper regard the the S type leaf spring with cambered surface in plate spring tires as the research object.The structure optimization analysis is carried out and the forming springback problem of are discussed in this paper.At present, the S-shaped parts are generally massive, potentially increasing fuel consumption. So this paper using finite element software Hyperworks builds finite element model, then calculate and optimize S-type parts according to the leaf spring suffered tire load situation on it. After optimized, the morphology graphic location and distribution of reinforcement material redistribution are obtianed. the results show that not only the sheet thickness is thinned, but the rigidity of the parts is improvd.S-shaped parts require two parts bend during the forming process, springback problem in the process is inevitable.the springback problem of plate bending springback is relatively mature, but the optimized parts with optimized ribs, result in different the formula of bending springback and tablet formula,so based onthe typical rebound formula, this paper derives the bending moment and rebound formula of palte with ribs, which is the basis of the mold to design the mold of S plate metal forming.Explicit module in the common software ABAQUS is employed to make a numerical simulation of the bending process of the variable cross-section plate beam and its springback process after unloading.Compared the changes of the the amount and the situation of stress of stiffener plate bending and bending springback, by changing the parameters of the ribs, springback influence law of the parameters of reinforcement ribs is explored finally. The forming numerical simulation of uniform cross-section plate and variable cross-section plate with rib indicate that the springback of the plate is proportional to the amount of the rib and there is also a proportional relationship between the springback of the plate and the height of the rib. By comparison, the height of the rib has a more obvious influence on the springback of the plate.