Optimized design and simulation analysis on automotive wheel hub bearing outer ring forging process
For the problems of low production efficiency and low material utilization in preparation of a certain automotive wheel hub bearing outer ring,a precision hot closed die forging process was designed,and based on forging forming theory,three forging processes including upsetting,pre-forging and final forging were formulated.Then,the forming process of the bearing outer ring parts was simulated by software Deform-3D,and it was found that the forging load under this process was high,the degree of die wear was deep,and the die life was low.Furthermore,the pre-forged structure was improved,and two optimization schemes were proposed,which was subjected to forming inspection and compared in sequence the post-forging equivalent stress,forging load and die wear conditions between two optimization schemes.The results indicate that the metal streamline and external forming conditions of the forgings using scheme 2 are good,the forging load decreases by approximately 20%,and the wear depths of upper die and lower die reduce by 1.200×10-6 and 0.780×10-6 mm,respectively which is helpful for improving the quality of forgings and ex-tends the life of forging dies.Finally,the production test indicates that the formed forgings meet the production requirements by using scheme 2.
bearing outer ringforgingloaddie wearmetal streamlinedie life
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