Square and rectangular sections deform very differently from round bar. The corners want to lift and the section wants to twist out of plane. Special rolls grip the section flats and constrain the corners through the bend, which keeps the bar in plane and prevents corner cracking. Without dedicated tooling you get scrap and inconsistent
- Yes. SweBend's SEVEN CNC control system can be installed on most existing bending machines - both SweBend machines and machines from other manufacturers. The upgrade includes the control unit, sensors, and operator training. Most retrofits are completed within three days (including on-site training). The CNC system provides program storage, repeatable positioning, and a graphical
Measurement during bending verifies the actual radius. Automatic correction compensates for material variation in real time. This is critical when tight tolerances are required across many identical parts.
Most important is that in a four-roll machine it is possible to produce a complete ring (or any other shape) in one single pass. Also, a four-roll design can clamp the profile more securely and manage bending moments more precisely than three-roll machines. This gives better control over curvature, produces more accurate geometry, and supports
Aluminium alloys are malleable but can deform or mark easily if unsupported. Tailored rolls and tooling match the profile shape and bending radius, maintaining cross-section stability, reducing surface defects, and improving repeatability across production runs. Custom tooling can also reduce setup time (operator adjustments).
Yes. With features like a lift roll that has a wide working range and adjustable tooling, a single section bending machine can produce rings in different diameters without mechanical reconfiguration, increasing flexibility and minimizing downtime.
Four-roll section bending machines apply continuous, controlled pressure to a profile through multiple rollers, which reduces deformation and delivers smooth, uniform curves ideal for closed ring production. The extra roll improves grip and bending accuracy compared with simpler configurations, helping maintain cross-section integrity and roundness in aluminium parts.
–Yes, almost any analog bending machine can be upgraded. Contact us today for an estimation and quote!
–Yes! We’ll upgrade your old machine (with or without CNC) and train your operators in only three days! Contact us today and we will help you further!
–Yes! We’ll upgrade your old machine (with or without CNC) and train your operators in only three days! Contact us today and we will help you further!
SweBend is located in Hässleholm, Sweden.
We create the world’s best bending machines.
