What are the bending forming methods of sheet metal?

There are several common bending forming methods for sheet metal. Here are a few of them:

  1. V-Bending: This is the most basic and widely used bending method. It involves clamping the sheet metal between a V-shaped punch and a V-shaped die. The punch applies force, and the sheet metal is bent to the desired angle.
  2. U-Bending: In this method, a U-shaped punch and a matching U-shaped die are used to bend the sheet metal. U-bending is often used for creating rounded or curved shapes.
  3. Air Bending: Air bending uses a punch and a die, but the die opening is larger than the punch width. When the punch descends, it contacts the sheet metal and applies force, but the die does not fully constrain the material. The depth of penetration of the punch determines the bending angle.
  4. Bottoming: Bottoming is a method where the sheet metal is bent until it comes into full contact with the bottom of the die. This technique is used to achieve precise and consistent bending angles.
  5. Roll Bending: Roll bending involves passing the sheet metal between a series of rollers to bend it into a desired shape gradually. This method is commonly used for creating cylindrical or curved components.
  6. Incremental Bending: Incremental bending involves bending the sheet metal incrementally, step by step, using multiple bending operations. This method is often used to create complex and precise shapes.

These are just a few examples of the bending-forming methods used in sheet metal fabrication. The desired shape, type of material, thickness, and production requirements are just a few of the variables that influence the method choice.

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