Mechanism of section parameters of equal width drawbead and the parametric design
When the height of drawbead was low,whatever the drawbead in Z direction or in nor-mal direction,it's section parameter would not be the given value,and the bead radius would in-crease with the decrease of the height of the bead.After analyzing and summarizing the different geometric constraints of Z direction drawbead and normal direction drawbead in the generation of section parameter,the respective mathematical theoretical solution formula was established.Ac-cording to the theoretical solution formula,the drawbead could be accurately established in 3D de-sign software,and was not limited by the types of 3D construction software.In order to design the drawbead quickly,accurately,and with reference,the theoretical formula was programmed into CATIA,and the CATIA-Power Copy function was used to realize the drawbead design system which could change the parameters at any time,which greatly improved the design efficiency of the drawbead.Based on one project of gate door inner,the maximum drawin error of the outer blank was 2.65 mm,and the maximum drawin error of the blanking hole was 3.15 mm.The thin-ning rate and the max failure error were both within 2%.
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NSTL
万方数据
维普
