Plate Bending steel is defined as steel that is deformed about a straight axis. We manipulate the steel until it reaches the desired angle or shape. The difference between bending and rolling depends on the radius. For larger radii, we call it rolling; for smaller radii, we call it bending. In this article, we will focus on plate bending.
The following are some of the key factors to consider when bending a steel plate:
The material tends to bend back to its original shape - this is often referred to as "rebound." When bending, each piece of material must be evaluated and taken into account. In some cases, the mold used to roll the material will bend the material beyond the desired radius, but excessive bending will be compensated by the rebound of the material.
The radius of curvature has an important influence on the thickness variation. A bend without an inner radius may mean that the material is broken and we should always avoid this bend. Below are two examples of the relationship between press stretching and thickness reduction:
If the radius is equal to the thickness of the steel sheet, the stretching of the material due to the tightness of the bending causes the thickness of the steel sheet to be reduced by as much as 20%.
If the radius is equal to 5 times the thickness, the material does not stretch so close and the material thickness decreases by less than 5%.
The bend must always be made perpendicular to the grain lamination direction (or up to 45 degrees). This will increase the resistance to bending and reduce the risk of breakage.
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