Cells on the right will output the desired values.
Sheet metal bending radius chart in mm.
The required die width is 12 mm and tonnage per meter is 22.
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.
The gauge inside radius die opening and minimum flange length are all interconnected through different equations and relationships the air bend force.
V die width is 6 8 times the plate thickness.
Use the minimum bend dimension values in the charts below for your minimum closeness of cutout to a bend.
Discover all our calculation tools in the calculators section of the top menu.
Material bend radii and minimum bend size charts please note.
Specifing a bend radius from here will help prevent hair line cracks.
You only have to insert interior angle flange lengths k factor inside radius and material thickness.
Bend forming 0 l a b 0 43t t thickness deduction 0 43t.
We go beyond the general rules of sheet metal bending as our customers want tight bend radii for sheet metal parts.
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 following bending force calculator should be used.
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.
Table 1 preferred recommended 90 degree bend radii for various sheet metals.
The material thickness will be measured in decimal form not by the gauge number.
Calculate unfold size with bend allowance chart.
Let s say i have a 2 mm thick sheet and i want to bend it.
New bending force calculation method.
The tool can calculate the required bending force for bending aluminum stainless steel mild steel and weldox or strenx high strength steels.
You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k.
Please check the new method for calculating the bending force of a press brake machine.
It is possible to choose other bends if you require but additional lead time and tooling charges may apply.
L unfold length a outside size b outside size k k factor none 90 bend unfold according to the neutral layer the distance from neutral to sheet inner side is t 3 inner r can refer to the above chart.
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.
To keep it simple i also use a 2 mm inside radius.
Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried.
The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase.
Recommended minimum bend radii for steel and aluminum.
Being able to read a bend force chart is crucial for any brake press operator and sheet metal engineer.