What precautions should be taken when bending sheet metal?

　　Bending is a crucial step in sheet metal processing. It involves applying external force to the workpiece using bending equipment. The workpiece is placed on the bending machine, and a lifting lever raises the brake shoes, allowing the workpiece to slide to the appropriate position. Then, the brake shoes are lowered onto the workpiece, and force is applied to the bending lever on the bending machine to shape the sheet metal part. So, what precautions should be taken when bending sheet metal?

　　The following precautions should be taken when bending sheet metal:

　　I. Springback of the Bending Workpiece

　　Many factors affect the springback of bent parts, including the mechanical properties of the material, wall thickness, bending radius, and normal pressure during the bending process. Additionally, the larger the ratio between the inner radius of the sheet metal and the sheet thickness, the greater the springback. Currently, springback is mainly avoided by manufacturers taking certain measures during mold design. Meanwhile, some structural improvements were made to the design, increasing the springback angle. For example, stiffening ribs were pressed into the bending area, which not only improved the rigidity of the sheet metal parts but also helped suppress springback.

　　II. Selection of Bending Blades

　　The selection of sheet metal parts is mainly based on their shape during the bending process. Generally, processing plants have more specialized bending tools, especially manufacturers with a high degree of specialization, to process various complex bends. Many factors affect the accuracy of bending blades, including the upper die radius, material, material thickness, lower die strength, and lower die opening size. To meet product requirements and ensure the safety of the bending machine, manufacturers have standardized bending dies.

　　III. Principles of Bending Processing Sequence

　　The principles of bending processing sequence are: bending from small to large; bending from the inside to the outside; bending more complex shapes first, then bending more general shapes; and ensuring that the previous process does not affect or interfere with subsequent processes.

　　In summary, these are some points to note when bending sheet metal. Bending is a common and widely used process in sheet metal processing. Bending machines shape sheet metal into various angles, and with CNC technology, sheet metal bending effectively improves processing accuracy and production efficiency. However, there are some precautions and key points to consider during sheet metal bending. Mastering these precautions can help prevent accidents.

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