Sheet Metal Bending Radius Chart In Mm

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.

Sheet metal bending radius chart in mm.

Crca inside bend radius equal to 0 65 times of sheet thickness is also enough. Specifing a bend radius from here will help prevent hair line cracks. 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. The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.

Being able to read a bend force chart is crucial for any brake press operator and sheet metal engineer. Cells on the right will output the desired values. You will need to know your material thickness mt the bend angle b the inside radius ir and the k factor k. It is possible to choose other bends if you require but additional lead time and tooling charges may apply.

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. Material bend radii and minimum bend size charts please note. Discover all our calculation tools in the calculators section of the top menu. Sheet metal bend radii if these guidelines are not followed more research and or some form of analysis may be requried.

Table 1 preferred recommended 90 degree bend radii for various sheet metals. The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase. To keep it simple i also use a 2 mm inside radius. Recommended inside bend radius for sheet metal parts should be equal to material thickness.

Use the minimum bend dimension values in the charts below for your minimum closeness of cutout to a bend. The material thickness will be measured in decimal form not by the gauge number. Calculate unfold size with bend allowance chart. You only have to insert interior angle flange lengths k factor inside radius and material thickness.

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. 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. 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.

The gauge inside radius die opening and minimum flange length are all interconnected through different equations and relationships the air bend force. Let s say i have a 2 mm thick sheet and i want to bend it. 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 required die width is 12 mm and tonnage per meter is 22.

Recommended minimum bend radii for steel and aluminum.