V-bending: The most widely used bending method
V-bending principle: V-bending utilizes a V-shaped upper die (punch) and a V-shaped lower die (die) on a bending machine. The upper die moves downwards, forcing the sheet metal material to bend and deform within the V-shaped lower die, thus obtaining bent parts with the desired angle (acute, right, or obtuse) and shape. It is the most widely used bending method.
V-bending characteristics: V-bending has the advantages of wide application, simple equipment, convenient operation, and low cost. However, it also requires considering and compensating for the material's springback effect. It can achieve bending at various angles and is suitable for the bending needs of most sheet metal parts. The required equipment usually only consists of a bending machine and a set of V-shaped molds, and the technical requirements for the operator are not high.
V-bending application scenarios: V-bending is widely used in numerous fields, including enclosures and cabinets (such as computer and server cabinets, distribution cabinets, etc.), home appliances (such as refrigerators, washing machines, air conditioners, etc.), architectural decoration (such as metal doors and windows, curtain walls, ceilings, etc.), and automobile manufacturing (such as body panels and structural parts).
U-bending: A process for achieving smaller bending radii
U-bending principle: U-bending is similar to V-bending, both utilizing molds on a bending machine. However, the shape of its upper die (punch) and lower die (die) is U-shaped. Through this special mold shape, U-bending is typically used to achieve bending requirements with smaller bending radii.
U-bending characteristics: U-bending can achieve smaller bending radii than V-bending, and the contact area between the sheet metal material and the mold is larger, resulting in more uniform stress distribution. This helps improve the forming quality of the bent parts and reduce deformation and defects. However, it requires higher precision in the bending machine and mold manufacturing, and the mold cost is also higher. U-shaped Bending Application Scenarios: U-shaped bending is mainly used in applications requiring specific bending radii, such as electronic products (e.g., internal metal brackets and connectors in mobile phones and tablets), medical devices (e.g., surgical instruments and medical equipment housings), and precision instruments (e.g., internal metal structural components in optical instruments and measuring instruments).
Multiple Bending: A Method for Achieving Complex Shapes
Multiple Bending Principle: Multiple bending refers to performing multiple bending operations on the same sheet metal part. Different bending methods, such as V-shaped bending and U-shaped bending, can be combined. Through multiple bending operations, various complex geometric shapes can be achieved, making it the main method for obtaining sheet metal parts with complex spatial shapes.
Multiple Bending Characteristics: Multiple bending offers extremely high design freedom, allowing for the creation of various complex sheet metal designs to meet diverse product needs. However, the process is relatively complex, requiring precise control of the angle, position, and sequence of each bend. It usually requires multi-station bending machines or bending machines equipped with special molds, resulting in relatively lower production efficiency.
Multiple Bending Application Scenarios: Multiple bending is mainly used in the manufacturing of complex-shaped sheet metal parts, such as in the aerospace industry (e.g., various complex-shaped metal components inside aircraft), the automotive manufacturing industry (e.g., various irregularly shaped parts inside car bodies), and various customized products.
