基于真实载荷作用的碾铆夹具的布局优化

Layout optimization for rotary riveting fixture by practical load

铆接目前已广泛应用于航天器制造领域,自动化铆接已经成为该领域的发展方向。碾铆夹具的布局对碾铆的精度及质量有着直接的影响。铆接过程中存在很大且方向循环变化的碾铆载荷,会影响碾铆夹具的稳定性。为此针对某型号芯轴组件进行研究,通过实验及计算得到铆接过程中轴向及径向的真实碾铆载荷。采用ANSYS Workbench仿真芯轴组件在真实载荷作用下的变形量。通过对比不同碾铆夹具布局的最大变形量,确定了最佳的碾铆夹具布局方案,并得到所应施加的夹紧力,为碾铆夹具的设计提供了依据。

Automatic riveting system is the development trend of the riveting which has been widely used in space-crafts manufacturing.The layout of rotary riveting fixture has direct effect on the precision and quality of the riveting.The large and cyclic changing riveting load affects the stability of the rotary riveting fix-ture.This paper is making a research on a model mandrel,measuring the riveting load by experiment and computing,and simulating the deformation of mandrel under different riveting fixture layout by AN-SYS Workbench.Based on contrasting the maximum deformation of mandrel confirms the best riveting layout and the clamping force,which provides basis for riveting fixture design.