Hardness test of Aerospace Micro Screws materials

Aerospace Micro Screws processing includes punching, bending, drawing, forming, finishing and other processes. The materials processed by Aerospace Micro Screws are mainly hot-rolled or cold-rolled (mainly cold-rolled) metal strip materials, such as carbon steel plates, galvanized plates, tinned plates, copper and copper alloy plates, aluminum and aluminum alloy plates, etc.

Since the spring-pressed unloading die is more convenient to operate than the fixed unloading die, the operator can see the feeding action of the strip in the die, and the spring-pressed unloading plate applies a flexible force to the strip when unloading, which will not damage the surface of the workpiece. Therefore, in actual design, the spring-pressed unloading plate is used as much as possible, and only when the unloading force of the spring-pressed unloading plate is insufficient, the fixed unloading plate is used instead.

Whether the mold used in Aerospace Micro Screws uses a spring-pressed unloading plate or a fixed unloading plate depends on the size of the unloading force, among which the material thickness is the main consideration.

The main purpose of the hardness test of Aerospace Micro Screws materials is to determine whether the annealing degree of the purchased metal sheet is suitable for the subsequent Aerospace Micro Screws processing. Different types of Aerospace Micro Screws processing technologies require plates of different hardness levels.

Aluminum alloy plates used for Aerospace Micro Screws processing can be tested with a Webster hardness tester. When the material thickness is greater than 13mm, a Barcol hardness tester can be used instead. Pure aluminum plates or low-hardness aluminum alloy plates should use a Barcol hardness tester.