Inside the High-Productivity Rolling Technologies Driving the Offshore Wind Evolution

July 14 (offshoreWIND.biz) The offshore wind sector is now standardizing around 15 MW+ mega-turbines, requiring monopile foundations with diameters stretching up to 15 meters (approx. 49 feet) and steel plate thicknesses exceeding 150 mm to 170 mm (approx. 6″ to 6.7″).

For fabricators, the core challenge is clear: how to roll plates of this scale with flawless geometric tolerance, minimized flat ends, and optimal cycle times, mitigating the risk of material waste and operational downtime.

The Challenge: Overcoming Edge Deflections and Rolling Cones on a Mega-Scale

At heavy thicknesses, structural steel exhibits spring-back and resistance to bending. Standard rolling machines struggle to minimize the flat ends at the plate edges, which often necessitates costly and time-consuming post-rolling trim and re-work.

Furthermore, fabricating the tapered, conical sections for onshore and offshore wind towers requires precise, asymmetrical force distribution. Traditional cone rolling methods rely on the manual experience of operators, resulting in long cycle times, high risks of plate slippage, and inconsistent geometric accuracy.

The Davi Solution: 3-Roll Variable Axis and Automated 4-Roll Systems

Davi addresses these challenges by supplying automated, customized turnkey lines engineered for towers and heavy foundations (Monopiles, Transition Pieces, Jackets, and Floating structures).

1. Davi MAV: 3-Roll Variable Axis Technology

For the extreme wall thicknesses of heavy monopiles and transition pieces, the Davi MAV series acts with the high-tonnage pressing capability of a press-brake combined with the flexibility of a plate roll.

· Individually Tilting Rolls: All three rolls can tilt up to 100 mm per 3 meters (approx. 4″ per 10 feet) of roll length. This allows the machine to achieve geometric precision on heavy cones via the Progressive Bumping Mode.

· All-Rolls-Drive with Flat Gearboxes: The side and top rolls are fully motorized and synchronized. Davi’s exclusive flat gearboxes allow the side rolls to travel close to the top roll (minimum gauge), letting the machine pinch the plate at the ideal tangent point to achieve the shortest possible flat end.

· Hydraulic and Mechanical Symmetry: To prevent asymmetrical frame deformation under extreme bending loads, Davi high-capacity MAV machines utilize a “push-push” (under 3,000-ton capacity) or “pull-pull” (above 3,000-ton capacity) configuration, ensuring even load distribution and adherence to structural tolerances.

Read full article: https://www.offshorewind.biz/2026/07/14/inside-the-high-productivity-rolling-technologies-driving-the-offshore-wind-evolution/