DIN 6935 recommends a minimum bend length that is approximately when mechanically bending sheet metal.
The DIN 6935 standard applies specifically to (sheet and strip) with thicknesses ranging from 0.5 mm to 20 mm . It governs the calculations for parts bent using standard workshop processes, such as V-die bending and wiping.
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) is vital to maintain material strength. DIN 6935 provides tables based on material thickness ( ) and steel grade. For bending angles , specific standard radii apply. If the angle exceeds 120∘120 raised to the composed with power Din 6935 Standard Pdf
: The , which dictates the position of the neutral axis. The Role of the K-Factor (
: Use DIN 6935 for how to bend and what tolerance to expect . Use DIN 6936 for what steel to buy .
When metal is bent, the material on the inside of the bend is compressed, while the material on the outside is stretched. Somewhere in the middle lies the , which neither stretches nor compresses. The DIN 6935 standard helps calculate the behavior of the metal around this axis. 1. Bend Radius ( DIN 6935 recommends a minimum bend length that
-factor represents the ratio of the neutral axis position to the material thickness ( , the neutral axis is exactly in the middle of the sheet.
The standard correlates the minimum inner bend radius ( rminr sub m i n end-sub
(where you can buy the PDF legally):
Without this standard, your CAD software’s default unfolding might be off by several millimeters, leading to scrap material. Using the DIN 6935 method guarantees that your flat pattern will result in a finished part that meets the required dimensional tolerances.
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The most frequent practical application of DIN 6935 is the calculation of the "developed length," or the total length of the flat sheet metal required before it is bent into its final shape. The standard provides specific formulas and correction factors that account for the bending angle, radius, and material characteristics, allowing engineers to calculate the correct unfolded lengths for projects. If you want to integrate this standard into