减少回弹的措施补偿法根据弯曲件的回弹趋势和回弹量大小，控制卷制的几何形

Measures to reduce springback The <br>compensation method <br>controls the geometric shape and size of the rolling according to the springback trend and the size of the bending part. So that after bending, the springback of the workpiece is compensated. <br>Stretch bending method The <br>sheet is bent while applying tension. This can transform the nip on the profile into a pull zone. The stress and strain distributions tend to be the same to reduce the amount of springback. <br>The pressure correction method <br>adds pressure to correct the bending deformation area after the sheet material is attached to the roller. <br>Increase the curvature. <br>According to calculations and experience, increase the roundness of the roll by 2% to 5% to meet the need for springback.

Measures to reduce rebounding.<br>Compensation method.<br>Control the geometry and size of the volume based on the rebound trend and the rebound size of the bent piece. This allows the rebound volume of the workpiece to be compensated after bending.<br>The bending method.<br>Apply a pull force while the plate bends. This converts the upper pressure area of the section into a pull area. Stress and strain distributions tend to be consistent to reduce the amount of rebound.<br>Pressure correction.<br>After the plate is fitted with the roller, the additional pressure corrects the bending deformation area.<br>Increase the bending.<br>Based on calculation and experience, the volume roundness is increased by 2% to 5% to meet the rebound demand.

Measures to reduce rebound<br>Compensation Law<br>According to the springback trend and springback amount of the bending parts, the geometric shape and size of the rolling are controlled. Thus, the springback of the workpiece can be compensated after bending.<br>Stretch bending method<br>Tension is applied while the sheet is bent. In this way, the upward pressure area of the profile can be transformed into a pull zone. The distribution of stress and strain tends to be consistent to reduce the amount of springback.<br>Pressure correction method<br>After the sheet metal is bonded with the roller, additional pressure is applied to correct the bending deformation zone.<br>Increase bending<br>According to the calculation and experience, the coiling roundness is increased by 2% to 5% to meet the springback requirement.