How to Bend Sheet Metal: A Comprehensive Guide to Custom Sheet Metal Fabrication

Last Updated on October 23, 2023 by assistant


Sheet metal fabrication is a versatile and widely used manufacturing process that involves the shaping and manipulation of sheet metal to manufacture a variety of components and products. One of the fundamental techniques of sheet metal fabrication is bending, which can create complex shapes and precise angles. In this article, we’ll delve into the art of sheet metal bending and explore the methods, tools, and considerations involved in achieving high-quality custom sheet metal parts.

Learn About Sheet Metal Bending

Sheet metal bending is the process of deforming a metal sheet along its straight axis, resulting in a permanent change in shape. By applying force, we force the metal plate to bend, forming an angle or curve. Industries such as automotive, aerospace, electronics, and construction commonly use bending, where precision and durability are critical.

Sheet Metal Bending Method

The V-bend method is the most widely used bending method. It involves clamping a metal sheet between a punch and die, which have matching V-shaped grooves. The punch presses against the sheet, causing it to bend into the V-shaped grooves of the die. The V-bend creates sharp angles for a variety of applications.


U-bend: Also known as edge bending, U-bend involves bending a metal sheet into a U shape. The punch sandwiches the sheet between the punch and the die and then forces it to bend around the die, creating a U-shaped profile. U-bends are common for creating channels, brackets, and enclosures.


Air Bending: Air bending is a general bending technique that uses punches and dies without direct contact. The punch applies force to the sheet but does not contact the die. Instead, the downward force of the punch and the elasticity of the material combine to bend the sheet. Air bending allows for greater flexibility in achieving various angles and radii.


Sheet Metal Bending Tools and Equipment

The bending machine serves as the main machine for bending plates. They consist of a solid frame, punches, and dies. The press brake mounts the punch and dies, with the metal plate placed between them. The machine applies force to the sheet, bending it to the desired angle and shape.

CNC machining, which stands for Computer Numerical Control Machining. CNC bending machines are equipped with computer control systems that accurately position punches and dies, ensuring precise and consistent bending. Furthermore, CNC technology enables the execution of complex bending operations and facilitates the production of intricate custom sheet metal parts.

Precautions for Successful Sheet Metal Bending

Material selection: Different types of metals have different properties, including elasticity, ductility, and resistance to deformation. Understanding the properties of the metal being bent is critical to determining the appropriate bending method, tools, and parameters.

Bending allowance and springback: Bending allowance refers to the length of material consumed during the bending process. Springback is the tendency of sheet metal to return to its original shape after bending. These factors need to be considered when designing the bending process to ensure that the dimensions and angles of the final product are accurate.

Die Design: The design of the punch and die plays an important role in achieving high-quality bending. Factors such as material thickness, bend radius, and required angle influence mold design. Carefully designed molds minimize deformation, reduce mold wear, and enhance the overall bending process.


Mastering sheet metal bending techniques is critical to producing custom parts accurately and efficiently. Whether it’s a V-bend, U-bend, or air bend, understanding the methods, tools, and considerations involved is critical to successful sheet metal fabrication. By partnering with an experienced and reliable sheet metal fabricator like Ruitai, we can ensure the production of high-quality custom sheet metal parts that meet your specific requirements.

If you are looking for a reliable CNC machining service provider, we are your best choice. You can contact us for a quote at any time and we will provide you with a free quote service. Thank you for reading. If you want to see more blogs about sheet metal bending, you can click here.