Roller Offset Forming Beads for Metal Sheet Distortion Mitigation

The patent applies local quality by designing beads with specific geometries (protruding and recessing beads) that are strategically positioned at specific locations on the rollers. These localized bead structures apply targeted support and control forces only where needed - specifically in areas apart from the roller path - without affecting the overall forming capability. The protruding beads engage with recesses in the metal sheet to prevent distortion, while recessing beads provide localized support, thereby maintaining dimensional accuracy in critical areas while preserving geometrical flexibility in the forming process

The patent implements preliminary anti-action by equipping rollers with protruding beads that engage with recesses in the metal sheet before and during the bending process. These beads apply counteracting forces that prevent distortion from occurring in the first place, rather than attempting to correct it afterward. The protruding beads press into the metal sheet at strategic locations to counteract the distorting effects of the bending forces applied by the rollers, thereby enabling complex 3D shaping while minimizing harmful distortion in areas apart from the roller path

The patent applies segmentation by dividing the roller surface into distinct functional zones with different bead geometries. The rollers are equipped with multiple protruding beads and recessing beads at specific positions, each serving a particular function in controlling distortion. This segmented approach allows the forming process to maintain simplicity and cost-effectiveness while significantly improving distortion control in surrounding areas, as each bead segment addresses specific distortion-prone zones independently