Taivutustaulukoiden

Taivutustaulukoiden, which translates to "bending tables" or "flex tables" in English, refers to tabular data used in engineering and manufacturing to define the bending allowances and springback compensation required for sheet metal fabrication. These tables are crucial for accurately predicting how a piece of metal will behave when bent and for ensuring the final product has the desired dimensions and angles.

The primary purpose of taivutustaulukoiden is to account for the material's elastic recovery, known as springback, after the bending operation. When sheet metal is bent, it deforms plastically, but it also retains some elastic properties. Upon removal of the bending force, the material tends to spring back slightly, reducing the formed angle. Taivutustaulukoiden provide correction factors or direct values for the bend allowance, which is the amount of material consumed in the bend, and often include considerations for springback.

These tables are typically organized by material type (e.g., steel, aluminum, brass), material thickness, and bend radius. Different materials have varying degrees of springback, and the relationship between bend radius and thickness also influences the bending process. Manufacturers use these tables to calculate the flat pattern dimensions of a part before it is bent, ensuring that after bending and springback, the part will meet the specified geometry. Modern computer-aided design (CAD) and computer-aided manufacturing (CAM) software often incorporate these bending tables digitally, automating the calculation and design process.