Bending Cross Sectional Area In Sheet Metal

The slack between the wipe die and the punch plays an important role in getting a good result.

Bending cross sectional area in sheet metal.

A piece of sheet metal w 20 inches wide is bent to form the gutter shown in the illustration. Where is the area moment of inertia of the cross section is the cross sectional area is the shear modulus is a shear correction factor and is an applied transverse load. 2d x 20 therefore. For materials with poisson s ratios ν displaystyle nu close to 0 3 the shear correction factor for a rectangular cross section is approximately.

Stress distribution through the thickness of the part. As a result the wipe die also determines the bend s inner radius. To define the bend region and reduce the force required to bend a part out of sheet metal down to something you can handle without a brake press slots can be cut at the bending line to selectively. F stretch forming force lbs ys material yield strength psi uts ultimate tensile strength of the material psi a cross sectional area of the workpiece in2 forces needed to bend sheet metal.

Total elongation and reduction of area both increase with increasing cross sectional area of the specimen. Wipe bending or edge bending is another way to bend sheet metal edges. If the cross sectional area is 48 square inches find the depth of the gutter. Let d the debth of the gutter let x the width of the gutter.

Percent elongation at frac ture decreases with increasing gage length because of localized necking in the specimen. It is important to make sure that the sheet is properly pushed onto the wipe die.