Sheet metal folding also called sheet metal bending. When the sheet metal is bent into a new shape, it will naturally rebound to a certain extent after the bending force is removed. This is called "rebound".
Because of the compressive strength of the bending metal plate, it will rebound. When the sheet metal is bent, one side is stretched and the other side is compressed; However, since the compressive strength of the material is higher than the tensile strength, the compression side successfully resists deformation and decompresses itself when the force is removed.
Springback is not a major problem, but it means that the manufacturer must compensate for the expected springback by over bending the sheet metal. If the metal is intentionally slightly over bent, a small amount of natural rebound will result in the correct angle.
Of course, calculating springback is far from simple. Several variables will affect the severity of springback, including the type and specification of materials. In addition, a larger internal radius results in greater rebound.
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