Process analysis and optimization of swing arm parts
In order to solve the cracking defects appeared in the forming of bulge and hole flanging of swing arm parts,it put forward a method to improve the design of swing arm parts.Firstly,the common stamping process defects of swing arm parts with complex structure were analyzed,and part design was verified through CAE analysis and the combination with physical samples.Second-ly,according to the requirements of part assembly,the cracking problem of bulge area could be im-proved by adjusting the radius of rounded corners and draft angle on the premise of reducing the repair workload as much as possible.For the cracking problem of the opposed flanging hole,the output pressure of the elastic parts was taken as the optimization target to determine the optimal combination of fillet radius,flanging hole height,and draft angle parameters.In addition,the scratches caused by pressing the elastic element into the swinging arm were solved by adding a lo-cal guide structure.Finally,the corresponding state sample was processed by trial production,and the different optimization schemes were verified.The results showed that for the optimization of swing arm parts,if the CAE analysis result of bulge has cracking risk and the thinning rate was no more than 28%,the fillet radius increased by no more than 2 mm and the draft angle increased by no more than 5°.It could improve the press-in performance of the product by enlarging the binder and increasing the pressing force of the flanging hole area and increasing the corresponding cham-fering on the structure.
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