Air Bending Of Sheet Metal

The diagram shows one such mechanism.

Air bending of sheet metal. Also known as press braking flanging die bending folding and edging this method is used to deform a material to an angular shape. The punch tip and the die shoulders fig. Highly formable and one of the best kinds of aluminum to bend. For this reason the actual angle of the tooling is relatively unimportant.

Bending is one of the most common sheet metal fabrication operations. The average hack requires at least one angled metal part and the best tool to make one is still the good ol press brake. Bending is a manufacturing process that produces a v shape u shape or channel shape along a straight axis in ductile materials most commonly sheet metal. Commonly used equipment include box and pan brakes brake presses and other specialized machine presses typical products that are made like this are boxes such as electrical enclosures and rectangular ductwork.

Use the minimum bend dimension values in the charts below for your minimum closeness of cutout to a bend. Miserable to bend cracking is very common and cold bending will always weaken the metal. Air bending is the most common type of 3 types of bending used in sheet metal shops today. The force must exceed the material s yield strength to achieve a plastic deformation.

In air bending a bend angle is formed by driving the punch into the sheet metal to a specific position within the die opening. With air bending fig. The tooling only touches the material at three points. The punch is then forced past the top of the die into the v opening without coming into contact with the bottom of the v.

In this process the workpiece comes in contact with the outside edges of the die as well as the punch tip. Air bending also known as free bending is the most common way for bending sheet metal because of its flexibility. 3a even less contact is made with the metal than with bottom bending. Geometry of tooling imposes a minimum bend dimension.

An air bend force chart or force chart breaks down a number of key components of sheet metal bending in an easy to reference format. Refer to the chart for values for folder as well as various press brake tooling combinations. The gauge inside radius die opening and minimum flange length are all interconnected through different equations and relationships the air bend force. Being able to read a bend force chart is crucial for any brake press operator and sheet metal engineer.