Davi 3 Roll Plate Roll Machinery

VARIABLE GEOMETRY PRESS-ROLL

Davi 3 Roll Plate Roll Machines

Born in Italy in 1966, DAVI is the world’s largest manufacturer of plate rolls, angle rolls, high productivity lines and customized rolling machines in terms of sales volume, employees, production, assets, rating.

DAVI with Engineering machinery have delivered dozens of machines for special bending applications in local markets and we have more than 11,000 components available at the factory logistic center. DAVI combined with our local knowledge offering a full customer support package following the customer from installation and training to remote support provided by the most experienced service engineers in the industry.

We offer DAVI plate rolls in three- and four-roll plate rolls designed for heavy-duty applications, including its MCA automatic line. This comes equipped with the company’s self-programming CNC system, which integrates with automation systems to reduce the need for additional labor.

SUGGESTED APPLICATIONS

  • Boilers
  • Pressure Vessels
  • Heat Exchangers

The most common design in the plate roll market, with a fixed top roll, the two side rolls swing up for pre-bending and rolling. Costing less than a four roll, the MCO three roll double pinch can roll plates from 15-20 mm (5/8 – 3/4 inch) thickness, up to 80-100 mm (3 – 4 Inch), or more, ideal for limited production volumes.”

DAVI 3 ROLL EXCLUSIVE BENEFITS:

SERVO-TRONIC
Servo-Tronic is more accurate than any previous hydraulic, electronic or mechanic (torsion bar) parallel system, and keeps all the three machine’s rolls parallel, even in case of electronic problems (less down-time), as it has a dual, independent but integrated, parallel control system (Davi Patent).

DAVI TECHNOLOGY
Permanent Lubrication, Energy Saving, digital Roll by Wire and the dual Servo-Tronic parallel system (most Davi Patented), make it innovative, state-of-the-art, easy to be operated, highly productive, very accurate, reliable and maintenance-free.

DAVI "MAV" Variable Axis Geometry PRESS ROLL Benefits

  • “BUILT-IN” THREE POWERED ROLLS
    The only variable axis plate roll engineered with three independently powered motors, as a standard feature, mounted directly on the roll shafts, allowing the most powerful torque transmission in the market. Machines of other brands have only the top roll powered. The side rolls have brakes, that make it difficult to feed properly thin, narrow or large diameter cans. The idle rolls can be powered, but only on request, and with small and low powered auxiliary motors.
  • THREE HYDRAULIC MOTORS
    DAVI has three independent hydraulic motors, directly splined on the roll shafts, to ensure excellent plate feeding, with less risk of slipping. The heavier capacity machine models also incorporate the DAVI “Multi-Motor” Top Roll technology (three or four hydraulic motors – depending on the machine size – to power the main gear-drive, allowing the machine to run and produce, also during maintenance on one of the motors) to increase the torque and avoid down time.
  • EXCLUSIVE TOP ROLL TILTING
    The exclusive tilting, self-aligning top roll housing (vs. the rigid housing of machines of other brands), allows, when making cones, to tilt also the top roll up to more than 100 mm (four inches), to get easier, faster, more accurate and more angle heavy cones. Other brands machines, usually, tilts 50 mm (2 inches) only the side rolls and nothing, or as little as 10-20 mm (1/2 to 3/4”) the top roll, but dangerously pressing on its shaft, due to the rigid housing.
  • ACCURATE FEEDING
    All three rolls are safely and efficiently braked automatically and hydraulically instead of using low efficiency, consumable brake linings common to other brands.
  • DAVI MAV RIGID AND COMPACT:
    – The hydraulic cylinders for the side rolls are “built-in” the frame, inserted “on the inside”, allowing them to be strong and positively “locked” into the structure, for more rigidity and higher performance.
  • MACHINE FRAMES
    – The two machine frames are connected by two large and heavy H-beams, to ensure the maximum of rigidity and compactness of the entire machine.

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The MCO uses both side rolls to prepend the plate, called “double pinch” therefore both ends of the plate can be pre-bent without removing the material from the machine (impossible on any single initial pinch, asymmetric designed machine). As the side rolls raise and lower to pre-bend the two edges, the large free access allows to form high stock bar through the rolls, compared to other roll designs.

The MCO provides the most powerful torque transmission and ensuring excellent plate feeding, without the risk of the plate slipping. All three rolls are braked automatically and hydraulically for safety and efficiency.

The MCO uses both side rolls to prepend the plate, called “double pinch” therefore both ends of the plate can be pre-bent without removing the material from the machine (impossible on any single initial pinch, asymmetric designed machine). As the side rolls raise and lower to pre-bend the two edges, the large free access allows to form high stock bar through the rolls, compared to other roll designs. 

POWERED ROLLS
The MCO has three independently powered rolls, mounted directly to each roll shaft to offer the market’s most powerful torque transmission available. This ensures excellent plate feeding without the risk of plate slipping. Standard feature on other brands offer only the top roll OR only the two side rolls powered, making thin, narrow or large diameter cylinders hard to properly feed. Optional auxiliary motors can be offered on request, but these are small and without much power. 

CNC CONTROLLED
Different choices of CNC controls are available, from an entry-level, user-friendly CNC to roll parts in automatic mode or more powerful and advanced DAVI CNC controls in the industry which can be self-programmable reducing the need of the most experienced plate roll operator. 

ACCURATE FEEDING
Unlike other brands using brake linings that wear out, Davi incorporates the safety of automatic and hydraulic assisted braking for both clamping rolls to ensure accurate plate feeding. 

HORIZONTAL FEEDING
Plates are loaded horizontally to allow the use of an in-feed conveyor and automated loading and unloading systems. The CNC controlled plate roll then becomes an automated un-manned rolling center greatly reducing cycle times, ideal for high quantity production runs. 

SERVO-TRONIC
The patented, state-of-the-art Servo-Tronic synchronized side-roll parallel control uses hydraulic AND electronic systems simultaneously for the most accurate parallel system on the market over competitor’s rolls using just hydraulic, mechanical (torsion bar) or electronic systems. 

PLANETARY PREBENDING
The Davi patented Planetary Swing Guide technology wraps the side rolls towards the center of the machine’s top roll to allow the tightest geometry available in the market compared to the inclined linear guides of other brands that, especially on large diameters, move farther away from the central roll and the plate clamping. 

DAVI TECHS
Planetary Guides require far less maintenance than the linear guide designs offered from other brands. They are friction-free, mill-scale proof and permanently lubricated. This feature along with the digital “”Roll-by-Wire “”and the Davi patented dual Servo-Tronic parallel system, make the Davi MCO the most innovative, state-of-the-art, and easy to operate three roll machine on the market. 

ISO – MADE IN ITALY
Davi is proud to say that all of the plate rolls produced are “”100% Made in Italy””, producing machines that comply with the tight ISO 9001:2008 certification standards which are a MUST in today’s competitive production environments. Like it’s Italian high-tech neighbors such as Ferrari, Maserati, Lamborghini and Ducati etc., Davi benefits from the engineering “”passion”” of it’s local area to build plate rolls with the most technological advancements in the market. “

The worlds number 1 plate rolls can make your production / faster / more accurate and most importantly more profitable with consistent cone or cylinder rolling on various material metals.

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