4-Roll | Vertical Plate Roll

VPR Range

VERTICAL PLATE ROLL FOR SUBMARINE

The Davi VPR (Vertical Plate Roll) is engineered specifically to replace outdated, slow, and low-precision press-bending systems, providing a completely optimized rolling solution tailored for heavy defense and submarine construction. 

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VPR Range

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Why Move from Conventional Pressing to Rolling?

productivity.
precision.
integrity.
efficiency.

Higher Productivity

Exponentially increase your shop's throughput by stripping away unnecessary cycle times and maximizing operational efficiency.

Mechanical Precision

Achieve tight structural tolerances and fully repeatable, consistent roundness across every section.

Surface Integrity

Produce smooth, uniform heavy cans that are free from the surface marks and indentations left by incremental pressing.

A Lasting Competitive Advantage

By packing high efficiency, precision, and pristine quality into a single step, the VPR elevates your production standards while lowering your Total Cost of Ownership (TCO).

submarine hulls

VPR vs. Conventional Press Rolls

Elimination of Tooling Setup

Elimination of Tooling Setup

Elimination of Tooling Setup

• Davi VPR: The internal geometry of the machine is pre-optimized for heavy-duty applications. You can wave goodbye to costly down-time because there is no tooling setup required between jobs.
• The Press Roll Alternative: Traditional presses demand frequent, manual modifications and complex tool adjustments to handle varying curvatures, draining valuable hours from your production schedule.

 

Reduced Flat Ends

Reduced Flat Ends

Reduced Flat Ends

• Davi VPR: Thanks to its ability to operate under asymmetric loads during the critical initial pre-bending phase, the VPR delivers a back roll pinching force that minimizes unbent flat ends right to the edge of the plate.
• The Press Roll Alternative: Operating strictly under symmetric loads with a lower maximum pinching force, press systems inevitably leave long, costly flat ends that require secondary trimming or reworking.

Maximum Power directly to the Plate

Maximum Power directly to the Plate

Maximum Power directly to the Plate

• Davi VPR: Both the top and bottom rolls are powered, creating low rotational friction. This allows virtually 100% of the machine's hydraulic capacity to transfer directly into effective plate deformation.
• The Press Roll Alternative: Massive static friction builds up over the pressing blocks, meaning a huge portion of a press's nominal capacity is wasted trying to overcome friction rather than actual metal forming.

Continuous Material Control

Continuous Material Control

Continuous Material Control

• Davi VPR: Constant, rigid pinching between the back and front rolls guarantees that the heavy plate can never slip or weave. Coupled with encoder control, the system maintains alignment even during rapid multi-pass repositioning.
• The Press Roll Alternative: Material feeding relies on intermittent, limited pinching structures. The plate frequently weaves out of alignment, forcing operators to halt the cycle for manual repositioning, killing your accuracy and cycle times.

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