Study On Forging Technology Of CAR Aluminium Alloy Wheel

Wheel is one of the most important parts in car running system and a exigent safety part. It supports the body weight and embodies appearance design. Due to unique performance of forged aluminium alloy wheel, now it is more and more popular. The requirement of its mechanical properties and contour structure is so strict that it is very hard to produce such wheel. It is urgent need to solve the problem of how to produce it efficiently and economically. In this paper, with the guidance of precision forming of complex compon- ents, based on the forming theory of closed-die forging, combining the technique of aluminium alloy forging and considering the characteristics of car wheel, the forging technology of aluminium alloy wheel is planned. The preforging and finish-forging are studied on three-dimensional thermal coupling FEM analysis by using UG and DEFORM. So the rule of metal flow and the distributions of stress, strain, velocity and temperature field can be obtained, as well as the stroke-load curve. Focusing on the preforging, the influence of the main forming parameters on metal flow and forming load, and the influence of forming velocity on die temperature field are studied. On the basis of the above, the forming parameters are optimized. In addition, the preforging and finish-forging also are studied on the physical simulation experiment, which verify the correctness of numerical simulation and the feasibility of the technology. The forging technology of aluminium alloy wheel that this paper confirms offers theoretical basis and technological parameters for practical production, and makes it possible produce high-quality wheel efficiently. It also provides experience for the precision forming of the similar complex parts.