Nosing Process of 2A12 Aluminum Alloy Spacing Shims for Non-disengagement Fastening Devices for Spacecrafts

In this study, a finite element simulation model for the nosing of the non-disengagement fastening device’s 2A12 aluminum alloy-spacing shim was established. Furthermore, the effects of the fillet radius, inclination angle, and stamping velocity of the nosing die on the formation of the spacing shim were examined. The following conclusions were drawn. (1) The die’s fillet radius primarily affects the spacing shim’s bending angle—as the die’s fillet radius increases, the bending performance decreases and meets the requirement when the fillet radius is 1.8 mm. (2) The die’s inclination angle affects the spacing shim’s nosing dimension: the nosing dimension increases with the increase in the die’s inclination angle and is optimal when the die’s inclination angle reaches 7°. (3) Within the range of 186–294 mm/s, the stamping velocity barely affects the formation of the spacing shim.