Isothermal Forming of Aluminum Alloy Control Arm

The aluminum alloy control arm is difficult to be obtained without cracks and the using ratio of material is usually under 50% by conventionally open-die forging. The isothermal forming was carried out to form aluminum alloy control arm. The forming process of isothermal forming is studied by FEM simulation and experiment.The influence of pre-forging on final forging is analyzed and then the filling, local velocity field, equivalent strain and any possible defects etc. of optimized pre-forging in the final forging are studied. A suitable pre-forging can be produced through numerical analysis and experiment, and problems like insufficient filling, metal folding have been perfectly avoided. The forging streamline and its internals are evenly distributed with no crack on the surface, the trend of crack can be predicted and the using ratio can be promoted to 90%. (paper)