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Advanced Plate Rolling Technology for Offshore Wind Power Tower Manufacturing(1)

Wind power has emerged as a promising renewable energy source, with offshore wind farms offering immense potential for harnessing clean electricity. The key to successful wind energy generation lies in the efficient design and manufacturing of wind power towers, which require robust support to elevate wind turbines and harvest wind energy. The cylindrical shape of wind turbine tower support structures ensures balanced wind-capturing capabilities from all directions, along with an appealing appearance that has garnered widespread recognition. To achieve these goals, the manufacturing process of wind power towers relies on advanced plate rolling technology, ensuring stability, precision, and reliability in wind turbine deployment.

Top 7 Steps of Plate Rolling Process for Wind Power Towers

The fabrication process of wind power towers involves the following steps:

  • Plate Preparation: The process begins with plate preparation, where flat steel plates are cut to size according to tower specifications.
  • Plate Rolling: Plate rolling, also known as roll-bending, is a crucial step in shaping the plates into the desired cylindrical form. Advanced steel plate rolling machines employ precision controls to bend the plates smoothly and accurately, achieving the required curvature and roundness.
  • Welding and Assembly: After plate rolling, the individual curved plates are welded together along their longitudinal seams to form a complete cylindrical section.
  • Roundness Inspection: The cylindrical tower sections undergo rigorous inspection to ensure their dimensional accuracy and roundness. Any deviations are corrected to meet the specified standards.
  • Hydraulic Pairing and Welding: Hydraulic pairing systems align the rolling stands and perform inner and outer circular welding. This process involves careful inspection of straightness and other tolerance parameters.
  • Flange Welding and Surface Treatment: Flanges are welded onto the tower sections, and non-destructive testing (NDT) is carried out to inspect welding seams and surface flatness. Sandblasting and painting treatments complete the assembly, ensuring corrosion resistance and structural integrity.
  • Final Quality Inspection: The finished wind power tower sections undergo a comprehensive quality inspection before transportation to the installation site.
4-roll plate rolling machine
4 Roll Plate Rolling Machine

Importance of Advanced Plate Rolling Technology

Advanced plate rolling technology plays a critical role in ensuring the precise and reliable manufacturing of wind power towers. By employing CNC-controlled steel plate rolling machines, manufacturers can achieve higher levels of accuracy, consistency, and efficiency in the bending process. The advanced technology allows for precise control of plate deformation, resulting in uniform thickness and curvature along the entire length of the tower sections. This enhances the overall structural integrity of the wind power towers, making them capable of withstanding harsh offshore conditions.

Exciting Plate Roll Bending Process of BIT’s 4 Roll Plate Bending Machine【Four Roll Plate Roller】

Advantages of Specialized Plate Rolling Machine

To meet the demanding requirements of offshore wind power tower manufacturing, specialized plate rolling machine tailored for this industry is essential. While standard steel plate rolling machines can provide satisfactory results for some applications, high-end offshore wind power towers demand exceptional precision and efficiency. Specialized equipment offers the following advantages:

  • CNC Precision: Advanced steel plate rolling machines equipped with CNC technology ensure superior precision, accuracy, and repeatability in the bending process, producing consistent and high-quality tower sections.
  • Efficient Production: Specialized equipment streamlines the manufacturing process, increasing production efficiency and reducing the time required to produce each tower section.
  • Safety and Reliability: The precision and control offered by specialized steel plate rolling machines contribute to the safety and reliability of wind power towers, enhancing their lifespan and performance.
  • Customization: Tailored equipment allows for customization to meet specific requirements, accommodating a variety of tower designs and sizes.

Plate Rolling Process for Wind Power Towers in China

While China has numerous manufacturers producing mid-range roll-bending machines, there is a lack of specialized equipment dedicated to manufacturing high-end offshore wind power tower and marine platform pile tubes. Standard roll-bending machines with simple add-ons and manual operations do not meet the stringent requirements for high-quality precision and efficiency in the production of wind power towers and marine piles. They often result in products with lower roundness (typically around 8 mm) and lower production efficiency (approximately 90 minutes per tower section).

The development of specialized CNC plate bending machine for these high-end applications involves integrating multiple disciplines, such as mechanical, digital control, hydraulic, and material sciences. Key challenges include designing reliable main drive systems, intelligent control systems, automatic material centering, and online correction of high-precision tube deflection. China has been dependent on imports for such advanced equipment due to the complex technical requirements and significant research and development investment.

Variable Geometry 3 Roll Plate Rolling Machine – 3 Roll Bending Machine


The application of advanced plate rolling technology is a crucial factor in the successful manufacturing of offshore wind power towers. Specialized CNC-controlled steel plate rolling machines play a pivotal role in achieving the required curvature, roundness, and precision, ensuring the stability and efficiency of wind turbines. By investing in specialized equipment, manufacturers can strengthen their capabilities in producing high-quality wind power towers, supporting the growth of the renewable energy sector and promoting a sustainable future.