The bend radius you select may not be available if the geometry of the part will not allow us to bend with the specific tooling required to achieve that radius.
Sheet metal bending radius chart in mm.
This tool allows you to determine tonnage internal radius v die opening and minimum flange you just have to insert the characteristics of the sheet metal to be bent.
To keep it simple i also use a 2 mm inside radius.
Specifing a bend radius from here will help prevent hair line cracks.
Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried.
The tool can calculate the required bending force for bending aluminum stainless steel mild steel and weldox or strenx high strength steels.
Calculate unfold size with bend allowance chart.
Material bend radii and minimum bend size charts please note.
Cells on the right will output the desired values.
Recommended minimum bend radii for steel and aluminum.
An air bend force chart or force chart breaks down a number of key components of sheet metal bending in an easy to reference format.
If the width to thickness ratio v s is not equal to 9 and the diameter to width ratio is not equal to 0 16 the above calculator will no longer be applicable.
The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.
The required die width is 12 mm and tonnage per meter is 22.
You only have to insert interior angle flange lengths k factor inside radius and material thickness.
Use the minimum bend dimension values in the charts below for your minimum closeness of cutout to a bend.
V die width is 6 8 times the plate thickness.
The material thickness will be measured in decimal form not by the gauge number.
Discover all our calculation tools in the calculators section of the top menu.
The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase.
New bending force calculation method.
It is possible to choose other bends if you require but additional lead time and tooling charges may apply.
Please check the new method for calculating the bending force of a press brake machine.
We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.
You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k.
I can now see that the minimum flange length is 8 5 mm for such a bend so i have to keep it in mind when designing.
The gauge inside radius die opening and minimum flange length are all interconnected through different equations and relationships the air bend force.
Bend forming 0 l a b 0 43t t thickness deduction 0 43t.
Let s say i have a 2 mm thick sheet and i want to bend it.
The following bending force calculator should be used.
With this free online tool we quickly get the sheet metal bend deduction and therefore the sheet metal blank initial flat length from the finished part measurements.
