Taivutussuhde

Taivutussuhde, known in English as the bending ratio, is a parameter used in engineering and manufacturing, particularly in the context of bending sheet metal and other materials. It quantifies the relationship between the inner radius of a bend and the thickness of the material being bent. The formula for taivutussuhde is typically expressed as R/T, where R represents the inner radius of the bend and T signifies the material thickness.

This ratio is critical for predicting how a material will behave during a bending operation. A lower taivutussuhde generally indicates a tighter bend relative to the material's thickness, which can lead to increased stress, potential cracking, or springback issues. Conversely, a higher taivutussuhde signifies a gentler bend, which usually results in less material stress and more predictable outcomes.

Different materials have varying tolerances for bending, and thus different optimal taivutussuhde values. For instance, metals like aluminum and stainless steel will have different minimum bending radii compared to softer materials. Understanding and controlling the taivutussuhde is essential for achieving accurate part dimensions, maintaining material integrity, and preventing defects during manufacturing processes such as stamping, folding, and press braking. Engineers use this ratio to select appropriate tooling, set machine parameters, and ensure the final product meets design specifications.