hemming

• Bending processes and methods

  May 25, 2025

  Bending processes and methods   Most bending parts are produced using air bending, bottom bending, or folding and hemming. These methods and processes all work in the same way: a punch presses the workpiece into the lower tool of the die. That is why the bending machines which carry out these methods and processes are called press brakes.     Air bending    With air bending, the punch presses the workpiece into the die without pressing it against the walls. Whilst the punch moves down, the sides of the workpiece bend up, which creates the angle. The deeper the punch presses the workpiece into the die, the more acute the angle. A clearance remains between the punch and the die. Air bending is referred to as a path-dependent method, as each angle requires a defined...

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