buigrollen

Buigrollen, in English often referred to as bending rolls or plate-bending rolls, are machines used in metal forming to bend sheets or plates into curved shapes. They operate by passing a flat workpiece between cylindrical rollers and gradually reducing the gap between the rolls to impose a bend. The most common configurations are three-roll and four-roll bending machines, though variations exist for different applications.

In a typical three-roll setup, two lower rolls rotate to feed the sheet, while a top roll is movable to adjust the bending gap. A back-up roll or rolls may provide support to the sheet to prevent wrinkles and maintain straightness. In four-roll or double-pinch machines, additional rolls help clamp and guide the sheet, allowing tighter radii and greater control. The bending process usually involves multiple passes: the sheet is fed through, the gap is reduced, and the sheet is rolled back through again to increase curvature, with adjustments made to achieve the desired radius.

Applications include fabrication of cylindrical shells, tanks, separators, curved panels, and other long, shallow-curvature components in industries such as shipbuilding, construction, and aerospace. Advantages of buigrollen include the ability to form long sections with relatively uniform curvature and a smooth surface finish. Limitations involve material thickness, minimum bend radius, risk of springback after unloading, and the need for careful setup and alignment. Safety and maintenance considerations are standard for heavy-forming equipment.