Material selection for Aerospace Micro Screws

There are three main processes for Aerospace Micro Screws: punching, bending, and stretching. Different processes have different requirements for plates. Material selection should also consider the selection of plates based on the general shape of the product and the processing technology.

1. Aerospace Micro Screws punching requires that the plate should have sufficient plasticity to ensure that the plate does not crack during punching. Soft materials have good punching performance, and after punching, parts with smooth cross-sections and small inclinations can be obtained; hard materials have poor quality after punching, and large cross-section unevenness, which is particularly serious for thick plates. For brittle materials, tearing is easy to occur after punching, especially when the width is very small.

2. The plates that Aerospace Micro Screws need to be bent and formed should have sufficient plasticity and a low yield limit. Plates with high plasticity are not easy to crack when bent. Plates with low yield limits and low elastic modulus have small rebound deformation after bending, and it is easy to obtain a bending shape with accurate dimensions. For materials with greater brittleness, a larger relative bending radius must be used when bending, otherwise cracking is likely to occur during the bending process.

3. The stretching of Aerospace Micro Screws sheets, especially deep stretching, is one of the more difficult sheet metal processing technologies. It not only requires the stretching depth to be as small as possible, the shape to be as simple as possible, and the transition to a smooth transition, but also requires the material to have good plasticity. Otherwise, it is very easy to cause overall distortion and deformation of the parts, local wrinkling, and even cracking of the stretched parts.