The minimum bend radius data shown in these charts is measured to the inside of the bend.
Sanitary sheet metal bend radius.
In this example the inside radius is 0 157 in which at 63 percent material thickness is the minimum inside radius that can be achieved where the bend turns sharp.
The bend radii listed are standard minimum if manufacturing for aircraft and aerospace applications.
Material thickness or 0 1575 in.
The tables below show bend radii and minimum bend sizes for materials and tooling combinations stocked by protocase.
For more on sharp bends see how the inside bend radius forms actual machine input depth dp di rp 0 03.
Minimum sheet metal bend length recommendations.
Also known as press braking flanging die bending folding and edging this method is used to deform a material to an angular shape.
For example if the thickness of the sheet is 1 mm the minimum bend radius should be 1 mm.
It is most economical to use a single bend radius throughout the design but if necessary you can utilize multiple radii.
Use this document to choose values that are both manufacturable and meet your needs.
The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend.
Regardless of what s called on the print this setup will produce an inside bend radius in the part much greater than that of the punch nose.
When sheet metal is bent it stretches in length.
Thus the smallest radius of any bend in a sheet should be at least equal to the thickness of the sheet.
Minimum recommended sheet metal bend length.
The bend allowance formula takes into account the geometries of bending and the properties of your metal to determine the bend allowance.
Bend radii minimum bend sizes.
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.
This is done through the application of force on a workpiece.
The bend radius refers to the inside radius.
We recommend a minimum bend radius of 1t for all sheet metal parts.
The formed bend radius is dependent upon the dies used the material properties and the material thickness.
The force must exceed the material s yield strength to achieve a plastic deformation.
As another example say you re working with 0 125 in thick material.
It is possible to choose other bends if you require but additional lead time and tooling charges may apply.
Bending is one of the most common sheet metal fabrication operations.
In this case the minimum producible inside bend radius is 63 percent of that 0 250 in.
The material thickness will be measured in decimal form not by the gauge number.
Bend radius throughout the sheet metal design is kept constant to take the advantage of using the same tool during manufacturing.
