Sheet Metal Bending involves applying an external force to the workpiece using a punch or a die. The external force causes the workpiece to deform. The punch and die design determine the type and length of the bend.
This article will cover different sheet metal bend operations and their applications. We recommend that you also check out this article about sheet metal cutting.
Sheet Metal Bending Methods
The following types of sheet metal-bending methods are available depending on the type, bend shape, production volumes, and sheet metal thickness.
- Press-Brake-Bending
- Roll-Bending
- Deep Drawing
1. Press brake Bending
Brake press or Press brake in sheet metal parts uses a v-types flat Punch and die to bend straight sheet metal at the required angles. During sheet metal bending, the operator places the sheet metal workpiece into a V-Die. The bending Punch is placed in the die against the sheet metal workpiece on the bending line.
The travel of the Punch against the sheet metal workpiece determines the angle of sheet metal bending. The punch radius determines the internal radius. The operator can therefore use the same Punch or die to bend different pieces of sheet metal.
Founded in 1993, DDM is a professional manufacturer engaged in the research, development, production, sale, and service of CNC press brake, CNC shearing machine, CNC laser cutting, roll bending, hydraulic press machine ironwork, and HVAC machines.
Dedicated to strict quality control and thoughtful customer service, our experienced staff members are always available to discuss your requirements and ensure full customer satisfaction. In recent years, our company has introduced a series of advanced equipment including a CNC machine center, CNC lather, and milling machine.
Brake press machines can bend sheet metal parts in low volumes. Different sheet metal parts can be bent by the same Punch and die. These industries use press bending machines:
- Electronic and electrical enclosure.
- Racks
- Doors etc.
Different types of Press Bending Operations
There are several types of press-brake bend operations. Each type of press-brake bending operation has its application.
- Air Bending
- Coining
- Bottoming
Air Bending
The sheet metal workpiece is not allowed to come into contact with the V-die’s bottom or outside edges during Air bending.
Bottom Bending
Bottoming, also known as bottoming in sheet metal, is bending sheet metal pieces to contact the punch tip or sidewall of the V–die opening. However, punch and die are not in direct contact with sheet metal. That means the sheet bend angle will equal the VDie angle.
Coining
To coin sheet metal, you bend a piece of sheet metal using a punch and a die so that the Punch penetrates the sheet metal part.
2. Roll Bending
The Sheet metal Roll Bending method makes tubes, cones, and other revolved metal sheets. This method uses a Roll Bending machine that applies force to a sheet of metal and shapes it into round shapes.
3. Drawing of sheet metal
Sheet metal drawing involves using a bending press to create cup-shaped shapes from sheet metal. This method is used extensively in the automotive industry to ensure high production rates.
