Calculations In Sheet Metal Design

This page also includes a link to a on line sheet metal bend allowance calculator.

Calculations in sheet metal design.

Sheet metal two flanges with vertical member clearance width design equations and calculator. The minimum fillet radius between the bottom and the wall of the tensile member should be greater than the thickness of the plate ie r1 t. Inside shift iss distance between the outside mold lines and the bend line. Bend angle represents the angle to which sheet metal has bend here it is 90 degree.

When calculating the outside offset use the included bend angle. The most common sheet metal form is a bend. Open sheet metal bend allowance calculator sheet metal bend allowance equations. Recommended center distance between holes in sheet metal part.

The value of the k factor should range between 0 0 5. Where ba is bend allowance. Inside through the material istm the distance between the outside and inside mold lines. R is inner bend radius.

Most sheet metal materials will conform to the calculations. Punch edge radius in. Inside offset isos distance between the inside mold lines and the bend line. Each type or alloy of metal has a unique density.

Recommended minimum distance between two hole centers in sheet metal design should be equal to sum of hole radius plus two times the sheet thickness. Recommended distance radius of hole1 radius of hole2 sheet thickness. Ultimate tensile strength psi. Importance of the k factor in sheet metal design the k factor is used to calculate flat patterns because it is related to how much material is stretched during bending.

Since sheet metal cannot be bent to a 90 degree position without breaking at sharp corners all bends will have an acceptable bend radius. For example the density of stainless 300 series is 0 0078 g mm 3. The ims metal calculator includes density data for each type of metal we sell so you don t need to look it up. Figure 1 50 sheet metal stretching design sheet metal stretch considerations.

Therefore it is important to have the value correct in cad software. The formula for calculating sheet metal bending allowance is please refer to the above picture. Ba bend angle π 180 r k factor t eqn 1. Where ba is bending allowance.

Sheet metal two flanges overlap clearance width design equations and calculator. In order to make the stretching smoother generally take r1 3 5 t the maximum fillet radius it should be less than 8 times the thickness of the plate ie r1 8t. Die edge radius in. The following illustration shows the equation calculation for determining the bend allowance when forming sheet metal.