blog/forum
Welcome!! - blog/forum - SheetMetalPatternsOnline.com
Choosing the Right Bending Radius in Sheet Metal Forming (2)
Hi!
Continuing with the topic of our last post:
DIN 6935 is a standard that specifies the minimum bend radius for sheet metal based on the thickness of the material. The standard provides guidelines for determining the minimum bend radius for various sheet metal materials.
The minimal allowable bending radiuses, are listed in table 1 of the standard.
Let us check some few examples, to understand, how the thickness and the steel grade affects the minimal bending radius.
According to that table, for a low resistance, low-carbon steel (tensile strength up to 380 N/mm2), for a 1 mm thickness, the minimal bending radius is 1 mm. But for a 20 mm thickness, the radius is 40 mm.
The same table, for a steel with a tensile strength from 490 to 640 N/mm2, for a 1 mm thickness, the minimal bending radius is 1.6 mm. But for a 20 mm thickness, the radius is 63 mm (for the bend parallel to the rolling direction). (and that would be 50 mm in the case of a transverse bend).
You can note there is a clear difference.
So, please note that the minimal bend radius for a given sheet metal application depend on a variety of factors, including the specific alloy or grade of material, the thickness of the sheet, and the desired degree of bend. And even the direction of rolling vs. the direction of bending.
It's important to consult the relevant standards and guidelines and your sheet metal supplier’s tables and suggested radii.
The DIN 6935 standard also sets forth the calculation criteria for determining the developed (flat) lengths of sheet metal bends. For your information, the patterns obtained using our sheet metal fabrication tool, available at SheetMetalPatternsOnline.com, incorporate these criteria.
2023-03-30
LITIO
Portoroz, Primorska - si
Continuing with the topic of our last post:
DIN 6935 is a standard that specifies the minimum bend radius for sheet metal based on the thickness of the material. The standard provides guidelines for determining the minimum bend radius for various sheet metal materials.
The minimal allowable bending radiuses, are listed in table 1 of the standard.
Let us check some few examples, to understand, how the thickness and the steel grade affects the minimal bending radius.
According to that table, for a low resistance, low-carbon steel (tensile strength up to 380 N/mm2), for a 1 mm thickness, the minimal bending radius is 1 mm. But for a 20 mm thickness, the radius is 40 mm.
The same table, for a steel with a tensile strength from 490 to 640 N/mm2, for a 1 mm thickness, the minimal bending radius is 1.6 mm. But for a 20 mm thickness, the radius is 63 mm (for the bend parallel to the rolling direction). (and that would be 50 mm in the case of a transverse bend).
You can note there is a clear difference.
So, please note that the minimal bend radius for a given sheet metal application depend on a variety of factors, including the specific alloy or grade of material, the thickness of the sheet, and the desired degree of bend. And even the direction of rolling vs. the direction of bending.
It's important to consult the relevant standards and guidelines and your sheet metal supplier’s tables and suggested radii.
The DIN 6935 standard also sets forth the calculation criteria for determining the developed (flat) lengths of sheet metal bends. For your information, the patterns obtained using our sheet metal fabrication tool, available at SheetMetalPatternsOnline.com, incorporate these criteria.
2023-03-30
LITIO
Portoroz, Primorska - si