Glossary
1 MIN READ
Apple-Shape Geometry
A specific, non-circular geometry programmed into a plate roll to pre-compensate for structural stresses and material behavior, optimizing the final roundness during the re-rolling phase.
Technical FAQ
Meeting strict ASME roundness codes on heavy welded cylinders requires compensating for material deformation near the seam. The calculator automatically computes an optimized, non-circular "apple-shape" geometry for the rolling machine to follow during the pre-welding passes. It ensures that after the longitudinal seam is welded and the shell undergoes final re-rolling, the cylinder achieves perfect roundness that complies with strict pressure vessel codes. This software tool is integrated into Davi CNC platforms to assist specialized heavy fabrication industries.
Wind tower and monopile manufacturers need to choose the right automation level for handling variable conical sections. Adaptive systems rely on shop cranes for initial plate placement and use pushers for fine alignment, whereas extended systems feature automated manipulators that continuously adjust, align, and feed plates for both cylinders and cones. An extended feeding system delivers continuous, automated cone processing without crane dependence, maximizing safety and speed. Davi's Smart Line for wind energy utilize extended continuous feeding technology to optimize cycle times.
Yes, Davi plate rolling machines are explicitly engineered to perform high-precision re-rolling on pre-welded cylindrical shells to correct deformations and meet strict roundness tolerances. Machines like the Davi MAV utilize an intra-frame design with a wide side roll stroke to maximize the leverage arm during down-pressing, significantly improving re-rolling performance on thick plates. Furthermore, control systems such as the Davi iRoll eXtreme feature specialized algorithms—including the ASME-compliant "Apple-Shape" calculator—that automatically compute and execute the precise geometric correction needed to guarantee target roundness after re-rolling.