Study On Warm Extrusion Forming Process Of Magnesium Alloy Loading Wheel

In order to get a method and craft to effective ely reduce forming force .In view of the problem of magnesium alloy loading wheel forming force ,considering product structure property, the size request, the material use ratio and production efficiency's factor, proposed the hollow billet extrusion reducing forming force technology, and designed the formed technology .The influence of hollow billet structure on extrusion force, the influence of technology parameters on the extrusion progress and the metal flow discreplinarian of forming progress were investigated by numerical simulation. The hollow billet structure result indicated when hollow outside diameter compared to internal K=1.65, the forming force is small. The AZ80 magnesium alloy when the ideal forming temperature is 300~350℃and the ideal strain rate is 5~9 mm/, carring on the warm extrusion to have good fluidity and the low resistance to deformation.According to the technology, designed and made four sets of molds, conducted the experimental study and the performance test.Experiment and performance test results show that the magnesium alloy casting materials pre-distortion, the hollow billet extrusion technology ,reduced the formed force largely, realized the magnesium alloy loading wheel forming on the 12500KN press. The product has good bottom forming, high precision, good surface roughness . the thchnology promotes the magnesium alloy wheel project application . It lays base for engineering application of magnesium alloy wheel. The performance achieves the components performance index, satisfied the vehicles operation requirements.