车灯反射镜液压力作用区域与径向压力

Research on the fluid pressure effecting region and radial pressure during lamp reflector forming

针对不规则曲面板材零件成形需要,提出了凹模腔液压力作用区域和主动径向加压的充液拉深新技术。通过数值模拟方法,采用分析软件eta/DYNAFORM5.6和HYPERWORKS9.0相结合,对St16板材车灯反射镜零件液压力作用区域和主动径向加压充液拉深成形过程进行了研究。以零件成形最终壁厚分布和短轴最小宽度为评定标准,分析了不同液压力作用区域和主动径向压力加载路径对成形质量的影响。通过数值模拟证明了,在不同液压力作用区域和主动径向加压充液拉深过程中,成形件的最小厚度的变化趋势。研究表明,采用凹模圆角处向外偏置6mm的液压力作用区域,并配合1.3倍液压力的主动径向压力加载路径,获得的车灯反射镜最大减薄率为10.056%,零件质量好。

For forming the reflector lamp with irregular surface panel,the hydro-mechanical deep drawing（HDD） technology with radial hydraulic pressure loading independently was proposed.of The fluid pressure effecting region and the process of HDD with independent radial hydraulic pressure were studied by numerical simulation employing the analytical software eta /DYNAFORM5.6 and HYPERWORKS9.0.The influence of different fluid pressure effecting regions and different radial hydraulic pressure loading paths on the forming quality were analyzed by taking the wall thickness distribution and the minimum width of minor axis as criterion.The variation trend of the minimum thickness of the formed part in fluid pressure region during HDD with independently loading radial hydraulic pressure process was achieved by numerical simulation.The results show that when the offset of the fluid pressure effecting region is 6mm outside the round corner of the die profile and the radial hydraulic pressure loading independently is 1.3 times,formed the reflector lamp of good quality may obtain with the thinning rate up to 10.056%