MCB

DAVI MCB 4-ROLL PLATE BENDING MACHINE

Whenever repeatability, productivityand ease of use are of essence, the 4-roll is the technology of choice. In a 4-roll machine, latest development of the rolling technology, the bottom roll clamps the plate guaranteeing a perfect control over its position throughout the whole forming process. The side rolls, actuated by the unique DAVI planetary guides technology, provide the necessary bending force achieving the tightest diameters per capacity on the market (1.1 of the top-roll) obtaining the highest accuracy thanks to the perfect parallelism offered by the patented Servo-Tronic© system. Compared to other technologies, 4-roll machines stand out for allowing fully CNC-automated production processes, significantly decreasing the reliance on operators’ skills and, hence, making it the most suitable tech for mass-production.

SHORTEST FLAT END THANKS TO STURDY AND CLOSED FRAME

The frame constitutes, effectively, the back-bone of the machine. The stress generated during plate forming must be withstood by this critical component and, eventually, transmitted to the foundations. DAVI machines feature the most compact and closed frame on the market, which allows to: improve the rigidity of connectionto the ground as well as machine stability; minimize deflections and displacement for the maximum rolls positioning accuracy; construct a much shallower and less expensive pit, due to reinforcement beams installed between frames (intra-frame design) rather than base platform. Based on extensive Finite Element Method (FEM) studies conducted by DAVI R&D, it is observed that the frame is particularly under stress while pre-bending. DAVI exclusive design features a much higher rigidity of the overall structure hence guaranteeing maximum accuracy even in the most demanding pre-bending and re-rolling operations.

TIGHTEST ACHIEVABLE DIAMETERS THANKS TO PLANETARY GUIDES

The bending power of a 4-roll machine is exerted to the plate by two side rolls. Unlike other solutions on the Market, DAVI exclusive design provisions a planetary actuation of the side rolls whereas, rather than being guided up and down, the mechanism rotates around a pivoting point. Thanks to this system: maximum performance thanks to force multiplier effect by leverage arm (distance between pivoting point and cylinder force application point); reduced top-roll deflection due to circular force application; forming the tightest diameters thanks to favorable geometry (with side rolls wrapping around small diameters cans).