If you're working with sheet metal bending, understanding is essential for accurate, efficient, and high-quality production. Utilizing a bend calculator based on these standards can further automate the process and ensure precision, as shown in this video demonstration .
⚠️ Be aware that many websites offering a "DIN 6935 Standard PDF" for free are frequently out-of-date, incomplete, or of poor quality. To ensure you are working with the most recent and legally compliant regulations, it is always best to purchase the official document from a trusted source.
) is a dimensionless coefficient that represents the ratio of the neutral axis position to the material thickness.
Designers and CNC programmers frequently search for a to keep reference tables, K-factor charts, and correction value formulas handy. Having access to the PDF documentation allows you to:
DIN 6935 is a German standard (Deutsches Institut für Normung) that provides the basis for the technical design and dimensioning of components made by bending sheet metal. It bridges the gap between the flat (unfolded) pattern and the finished (folded) 3D part. Din 6935 Standard Pdf
To define specifications for minimum bending radii, permissible deviations, and calculations for developing bending lengths, primarily for steel sheet/strip.
The DIN 6935 standard specifies the chemical composition of the steel strips, including the maximum allowed percentages of carbon, manganese, silicon, and other elements. The standard also defines the acceptable limits for impurities, such as sulfur and phosphorus. The chemical composition of the steel strips is critical in determining their weldability, formability, and mechanical properties.
When searching for the PDF, look for the most current revision to ensure your production workflows utilize updated engineering mathematics.
For quick calculation, reference tables within the official DIN 6935 documentation are more efficient than manual calculation. If you're working with sheet metal bending, understanding
When you bend a piece of sheet metal, the outside of the bend stretches, and the inside compresses. The neutral axis (where no stretching or compression occurs) shifts inward. DIN 6935 provides a scientifically validated method to locate that neutral axis using the .
Using the DIN 6935 standard provides several benefits for manufacturers, designers, and users of spring washers, including:
Ratio: Divide the inner radius by the sheet thickness to find the appropriate K-factor using the DIN 6935 lookup tables.
: Information on the latest DIN 6935:2011-10 revision, which supersedes older 1975 and 2010 versions, can be found on Scribd - Cold Bending Standards . To ensure you are working with the most
is the fundamental German industrial standard for the cold bending of flat rolled steel products
The Role of DIN 6935 in Precision Engineering The standard is a critical technical framework that governs the cold bending of flat rolled steel products within the mechanical engineering and steel construction industries. Its primary function is to provide standardized methods for calculating "developed lengths" (the flat state of a part before it is bent) while ensuring structural integrity by specifying minimum bending radii. Core Technical Specifications
According to DIN 6935, the K-factor is not static; it changes depending on the ratio of the inner bend radius to the material thickness ( Small Radius (
[ A = \pi \cdot (r + v \cdot s) \cdot \frac\beta180 ]
) to determine the exact length of the flat blank needed to produce a bent part, accounting for changes in the "neutral fiber" during the process.