Bending Galvanized Sheet Metal Over Gable

Geometry of tooling imposes a minimum bend dimension.

Bending galvanized sheet metal over gable.

Flashing is metal trim that fits over joints where two sections of roof meet. Bending is one of the most common sheet metal fabrication operations. This is normal for galvanized steel and with the cathodic properties of the zinc coating is acceptable for a part bent after galvanizing. Also known as press braking flanging die bending folding and edging this method is used to deform a material to an angular shape.

The flashing should overlap the edge of the roof by one inch to help direct water. When galvanized steel is bent after the coating has formed there is no issue with cold work but there can be an issue with the coating cracking or crazing in the area of the bend. Even on malleable materials you can end up cracking the metal at the bend or weakening it to the point where it ll break with minimal force. Metal is placed cantilevered over the edge of the lower die similar to the setup in edge bending.

Refer to the chart for values for folder as well as various press brake tooling combinations. 2 wooden or metal form blocks block of hardwood and heavy duty hammer or mallet optional calculator or online bend calculator. Monkeys spinning monkeys by kevin macleod. Simple sheet metal bender using a hand roller clamps and plywood.

The force must exceed the material s yield strength to achieve a plastic deformation. Abn sheet metal hand seamer 3 inch straight jaw manual metal bender tool sheet metal bending pliers flattening tool 4 5 out of 5 stars 137 27 89 27. The solution is to have a radius on the tool that you ll be using to bend the metal. Bending the galvanized steel can help you mold it into shapes appropriate for your project.

If you bend to a sharp inside corner with sheet metal you ll be adding a ton of internal stresses. This is done through the application of force on a workpiece. Unlike in edge bending with rotary bending there is no pressure pad. Galvanized steel is a resilient and corrosion resistant metal which makes it an ideal component in many projects.

The diagram shows one such mechanism. It helps direct water away from the meeting points and keeps the roofing dry. The groove on the cylinder is dimensioned to create the correctly. Use the minimum bend dimension values in the charts below for your minimum closeness of cutout to a bend.

To bend your sheet metal with a vise and hammer you will need.