As SweBend’s UK partner, WJSUK is always interested in real-world applications that demonstrate what the right plate rolling technology can achieve, particularly where demanding materials, tight geometries and reliable production performance are involved.

This European project is a useful example for UK manufacturers working with high-strength, corrosion-resistant materials such as Superduplex stainless steel.

A European engineering company required a compact cone-bending machine capable of forming challenging conical geometries in 4 mm Superduplex stainless steel. The application demanded predictable results, tight tolerances and a machine that could perform consistently in day-to-day production.

Machine: SweBend PB3-6-4, a three-roll, double-pinch plate bending machine

Application: Cone forming in Superduplex stainless steel

Material: 4 mm Superduplex stainless steel

Cone geometry: 189 mm small-end diameter, 387 mm large-end diameter, 623 mm cone height

Capability: Side support and double-pinch pre-bending to support accurate cone closure with minimal flat ends

Operator control: Wireless Bluetooth pendant, allowing free movement and clear visibility of the workpiece during setup and forming

The customer needed a machine capable of rolling tough Superduplex stainless steel into cones without compromising on accuracy, stability or ease of use.

Key application requirements included:

• 4 mm Superduplex stainless steel
• Cone diameters from 189 mm to 387 mm
• Cone height of 623 mm
• Accurate pre-bending
• Stable forming throughout the cone length
• Reliable, repeatable performance for production use

Rather than approaching the requirement as a standard plate rolling application, SweBend selected and configured the machine around the material behaviour, cone geometry and the customer’s production needs.

SweBend’s PB3 series is designed for applications where control, repeatability and bending force need to work together.

The PB3-6-4 used in this project is a three-roll, double-pinch plate bending machine suitable for both cone and cylinder forming. Its compact format makes it well suited to smaller diameter work, while its double-pinch design supports strong, consistent pre-bending, an important factor when forming cones with minimal flat ends.

Machine features included:

• 1250 x 5 mm maximum capacity
• Three-roll, double-pinch design
• Capability for cone and cylinder forming
• Suitability for demanding materials such as Superduplex stainless steel
• Side support for improved plate stability during conical bending
• Electronic roll parallelism
• Hydraulic drive
• Wireless Bluetooth control for operator flexibility

SweBend reported that the machine handled the specified Superduplex cones without difficulty.

The results demonstrated:

• Stable cone rolling across varying diameters
• Accurate pre-bending with minimal flat ends
• Consistent geometry across the full cone height
• Reliable control throughout the forming process
• For UK manufacturers, this is a useful example of how the right machine configuration can help manage challenging materials and demanding cone geometries.

Integrated side support plays an important role when forming cones. It helps stabilise the plate during rolling and supports accuracy as the diameter changes through the length of the cone.

This is particularly valuable when working with thinner plates, higher-strength materials or larger diameters, where uneven forces can quickly affect the final result.

The Bluetooth control unit allows the operator to move freely around the machine during setup and bending.

Being able to maintain a clear line of sight to the workpiece can improve positioning, reduce setup time and support a safer, more predictable bending process.

The PB3-6-4’s double-pinch design provides strong pre-bending capability, which directly supports cone quality.

Effective pre-bending helps reduce flat ends and improve seam alignment, both important factors in precision conical bending applications.

Superduplex stainless steel is a specialist material, but it is used across demanding UK sectors including offshore energy, marine engineering, chemical processing, water treatment, pressure equipment and high-integrity fabrication.

Its strength and corrosion resistance make it well suited to aggressive environments, but those same properties can also place greater demands on the bending process.

For manufacturers working with Superduplex stainless steel, high-strength materials, small diameter cones or demanding plate rolling applications, this project highlights the importance of selecting a machine around the application, not simply relying on standard capacity figures alone.

As SweBend’s UK partner, WJSUK can help UK customers explore suitable SweBend plate rolling and cone bending solutions for their own production requirements.

SweBend technology is built around demanding bends and WJSUK is here to support UK manufacturers in finding the right solution.