Bending Sheet Metal Circle

There are two basic frame designs.

Bending sheet metal circle.

If the sheet is anisotropic the bending should be performed in the preferred direction. 1 horizontal 2 vertical. A minimum bend radius of 0 indicates that the sheet can be folded over on itself. The formed bend radius is dependent upon the dies used the material properties and the material thickness.

Also known as press braking flanging die bending folding and edging this method is used to deform a material to an angular shape. To ascertain your k factor inside radius and material thickness expressed as a decimal you should use an bend allowance chart. Anisotropy of the sheet metal is an important factor in bending. The force must exceed the material s yield strength to achieve a plastic deformation.

The u punch forms a u shape with a single punch. A sharp 90 bend means that the material must go all the way to the corner while the radius bend cheats the corner. If you tried to make a sharp 90 bend the metal would likely crack. A test to determine anisotropy is discussed in the sheet metal forming section.

Roll bending or curving as defined here designates the manufacture of sheet metal parts that are rolled or curved into cylindrical shapes or shapes that have a smooth radius associated with them. 0 017453 x 90 x 0 020 0 33 x 0 024 0 0438558984 inch bend allowance. The pre bent material would have this black area which is formed into the bend. This is putting a simple hem on a curved piece of zinc with a 7ft radius.

This is done through the application of force on a workpiece. Bending is one of the most common sheet metal fabrication operations. The bend deduction is the amount the sheet metal will stretch when bent as measured from the outside edges of the bend. To think about bending a sheet of metal that has appreciable thickness focus on an imaginary central sheet the so called neutral line or neutral axis within the thickness.

Monkeys spinning monkeys by kevin macleod. This black area is our bend allowance.