Din 6935 Standard Pdf _verified_
The DIN 6935 standard is a critical technical guideline for the cold bending of flat rolled steel products. Primarily used in mechanical engineering and steel construction, it provides the standardized formulas and tables required to calculate "developed lengths"—the length of a flat sheet before it is bent into its final shape. Key Specifications of DIN 6935
The standard outlines several parameters essential for precise sheet metal fabrication: Bending Radius (
): Recommends specific radii from the DIN 250 series (e.g., 1, 1.2, 1.6, 2, 2.5 mm) to ensure uniform curves across different machinery.
Minimum Leg Length: For mechanical bending, the standard suggests a minimum leg length ( ) of approximately 4 times the bending radius ( ) to prevent defects. Thickness Reduction: It accounts for a material thickness (
) decrease of approximately 20% in the rounded portion of the bend.
Rolling Direction: Bending should ideally be carried out transverse (perpendicular) to the rolling direction of the steel to reduce the risk of cracking. Calculation of Developed Lengths
The core utility of the DIN 6935 standard is its method for determining the unfolded length of a part using the formula:
Developed Length=a+b+vDeveloped Length equals a plus b plus v are the leg lengths, and is a compensating value. Opening Angle ( Compensating Value ( 0∘0 raised to the composed with power 90∘90 raised to the composed with power Din 6935 Standard Pdf
Calculated using a specific formula involving radius, thickness, and a correction factor ( 90∘90 raised to the composed with power 165∘165 raised to the composed with power
Calculated with a modified formula to account for larger opening angles. 165∘165 raised to the composed with power 180∘180 raised to the composed with power The compensating value is considered negligible ( Correction Factor ( The correction factor represents the shift of the neutral fiber during bending. It is calculated as: For ratios where , the correction factor is simply set to . Where to Access the DIN 6935 Standard PDF
The official version is DIN 6935:2011-10, which superseded the 2010 edition. It can be acquired through authorized distributors: DIN 6935 Cold Bending of Flat Rolled Steel - Modulus Metal
DIN 6935 is the technical standard for the cold bending of flat rolled steel. It is widely used in steel construction and mechanical engineering to ensure precision during the sheet metal fabrication process. Core Purpose of DIN 6935
The standard provides the mathematical framework and geometric rules for calculating the developed length (unfolded length) of a part before it is bent. This ensures that once the metal is formed, its final dimensions remain accurate despite the physical stretching and compression that occur at the bend. Key Technical Specifications DIN 6935 Cold Bending Guidelines | PDF - Scribd
standard, titled "Cold bending of flat rolled steel" , is a technical regulation that establishes guidelines for the cold bending of sheet metal and flat steel products
. It is primarily used in mechanical engineering and steel construction to ensure precision and prevent material failure during fabrication Core Content of DIN 6935 The DIN 6935 standard is a critical technical
The standard provides a systematic approach to calculating the dimensions of a part before it is bent, ensuring the final product meets specified measurements Minimum Bending Radii
: Specifies the smallest radius a specific steel grade can be bent without cracking or compromising structural integrity Developed Length Calculation
: Explains how to determine the "stretched" or "unfolded" length of a part by using compensation values ( ) and correction factors ( Neutral Fiber Deviations
: Accounts for how the material's "neutral axis" shifts during the bending process, which affects the final length of the legs Permissible Deviations
: Outlines the legal tolerances for bending angles and radii to maintain quality control in manufacturing Technical Applications Material Selection
: Includes tables categorizing different steel grades and their suitability for cold bending Design Guidelines
: Recommends selecting bending radii from a preferred series to ensure uniformity across different fabrication setups Modulus Metal Minimum Leg Length Key Technical Concepts in the Standard If you
: Defines the minimum distance required between a bend and the edge of the sheet to allow for proper tooling engagement Accessing the Standard
As with most DIN (Deutsches Institut für Normung) standards, the full official text is a copyrighted document. You can find official copies and related technical supplements through the following types of sources: Official Purchase
: The complete updated standard (latest version often cited as DIN 6935:2011-10 ) can be purchased through the or authorized distributors like Beuth Verlag Technical Previews
: Summary guides and tables of the standard's calculations are often available on professional platforms like or specialized engineering sites like Modulus Metal under this standard? DIN 6935: Cold Bending Steel Standards | PDF - Scribd
Key Technical Concepts in the Standard
If you are looking at a DIN 6935 PDF, you will likely see charts and formulas revolving around three core concepts:
3. Technical Content and Methodology
1. Scope
- Applies to flat steel products (e.g., strips, sheets, plates) that are cold-formed without heating.
- Covers bending, folding, roll forming, and other cold forming processes.
- Defines requirements for material properties, testing, and permissible deviations after forming.
Understanding DIN 6935: The Key Standard for Flat Rolled Steel Bending
In the world of sheet metal fabrication and structural engineering, precision and consistency are non-negotiable. The DIN 6935 standard serves as the definitive German (and widely adopted European) guideline for the bending of flat rolled steel products. Accessing the official DIN 6935 Standard PDF is essential for any quality assurance or production department working with bent steel components.
3. Terms and definitions
- Cold forming, bending radius, springback, thinning ratio, etc.