弹性元件选用对板料弯曲成形回弹的影响

Influence of elastic components selection on sheet metal bending springback

弹簧、橡皮和液压垫是设计压边装置的弹性元件,三者加载的压边力不同,而压边力是影响弯曲回弹的主要因素之一。取弹簧、橡皮和液压垫分别进行弯曲有限元模拟,结果表明:初始压边力相同,弹簧压边是三者中控制回弹效果最理想的;液压垫压力大于初始压边力,则控制回弹效果又优于弹簧压边。本研究结果可为弯曲模具压边装置设计时选用弹性元件提供参考。

Spring, rubber and hydraulic pad are elastic components intended for the blank-holder devices. The three factors are loaded with the blank-holder force changing differently, which is one of main factors influencing the bending springback. Finite element simulation of bending was conducted with spring, rubber and hydraulic pad respectively. The results show that the initial blank-holder force being identical, spring blank-holder achieves the best effect of controlling springback. When the blank-holder force of hydraulic pad being greater than the initial blank-holder force, the effect of controlling springback is better than that of spring. These results can provide reference for selecting elastic components intended for the blank-holder devices of bending die.