How to ensure the stability of angle accuracy during sheet metal bending?
Publish Time: 2025-03-13
As an important part of metal processing, the stability of angle accuracy of sheet metal bending is crucial to the quality and performance of the product. In actual operation, the angle accuracy of sheet metal bending is often difficult to control due to various factors. However, through a series of scientific process designs and strict operating procedures, we can effectively ensure the accuracy and stability of the angle of sheet metal bending.Before sheet metal bending, the design of the bent parts is crucial. When designing, factors such as the mechanical properties, surface quality, degree of hardening, and fiber direction of the material should be fully considered, which will affect the accuracy of the bending angle. In particular, the design of the bending fillet radius should be avoided to prevent cracks or breaks during the bending process. At the same time, the rebound phenomenon should also be considered. The rebound is the angle change caused by the elastic deformation of the material after the bending is completed. It is necessary to reserve the rebound angle when designing the mold, or increase the corrective positive pressure during bending to reduce the rebound.The selection and debugging of the mold is also the key to ensuring the stability of the angle accuracy of sheet metal bending. The V-groove angle, width, and fillet radius of the mold need to be accurately selected and debugged according to the properties of the material and the needs of bending. For example, when the material has a high tensile strength and a large amount of springback, a V-groove die with a slightly smaller angle, such as an 88° lower die, should be used to reduce the springback. At the same time, the precision and wear resistance of the die also need to be guaranteed to extend the service life of the die and maintain the stability of the bending angle.In the bending process, the calculation of the bending coefficient is also an important part of ensuring the stability of the angle accuracy. The bending coefficient is affected by many factors such as sheet material, thickness, bending angle, and die shape, so it needs to be determined through precise calculations and experiments. At present, 3D software such as PRO/E has been widely used in the calculation of bending coefficients. These software can simulate the bending process and predict the angle and shape after bending, thereby helping engineers optimize the bending parameters and improve the angle accuracy.In addition, the bending order and bending direction will also affect the angle accuracy. In the bending process, the principle of first inside and then outside, first small and then large should be followed to avoid deformation and interference of the workpiece. At the same time, when determining the bending direction, the blank's blanking fracture zone should be placed on the inside of the bent part as much as possible to prevent the microcracks in the fracture zone from expanding into cracks under the action of the outer tensile stress.Finally, strict operating procedures and quality control are also important guarantees for ensuring the stability of the angle accuracy of sheet metal bending. Operators need to perform bending operations in strict accordance with process requirements and conduct strict inspection and measurement of the bent workpiece to ensure the stability of the angle accuracy. At the same time, it is also necessary to regularly maintain and service the equipment and molds to keep them in good working condition.In summary, through scientific design, precise mold selection and debugging, reasonable bending sequence and direction, strict operating procedures and quality control, we can effectively ensure the stability of the angle accuracy during sheet metal bending.
