Joggled grooves along the cylinder body - rillor in Swedish, like the hoops pressed into an oil drum at industrial scale - serve three functions in pressure vessel construction. They strengthen the shell against external collapse and internal stress, they drive the cylinder into a more accurate circular cross-section, and - most importantly for boiler
Section bending shapes structural profiles (beams, angles, channels, tubes) by passing them through driven rolls that apply force along the profile's cross-section. Plate rolling bends flat metal plates by feeding them between large-diameter rolls that apply a distributed bending force across the plate width. The machines differ in roll configuration, force distribution, and the type
- 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
The right machine generally depends on four factors: what material you are bending (sections, plates, or tubes), the thickness and dimensions of the material, the required output geometry (curves, cylinders, cones, or custom shapes) and the production volume. SweBend's technical team evaluates your production requirements - including material type, batch size, and precision tolerances -
SweBend manufactures section bending machines, plate bending machines (plate rolls), and custom forming machines. Section bending machines handle beams, profiles, angles, and tubes. Plate rolls bend flat metal plates into cylinders, cones, and curved shapes. Custom forming machines are designed and built for specific materials, geometries, or production requirements that standard configurations cannot meet. All
In some cases, yes. Standard bending machines can often be configured with tooling and control options to handle a range of applications. However, when geometry, volume or accuracy requirements differ significantly, dedicated or custom solutions are usually more efficient in the long term.
Material properties such as yield strength, springback and surface sensitivity influence the required bending force. They also affect roll geometry and control strategy. High-strength or sensitive materials typically require higher precision and more advanced control.
Low to medium production volumes often favor flexible standard machines. High production volumes can justify dedicated or tailored forming solutions that reduce cycle time, handling and setup changes.
The most decisive factors are material type and thickness, part geometry, required radius, tolerance levels, production volume and the need for automation. Choosing the right bending machine means matching these factors to the correct bending technology. It is not just about machine size.
Yes. A three-roll plate bending machine is inherently versatile. By adjusting roll positions and alignment, the same machine can produce straight cylinders, variable radius parts, and cones, making it well-suited for workshops that handle a wide range of bending tasks.
SweBend is located in Hässleholm, Sweden.
We create the world’s best bending machines.
