DAVI MCA 4 roll plate bender

Emergency stop button.

Joy Sticks for all the machine functions:
Analog dial indicators to read the position of the side bending rolls. EASY PRO Programmable readouts available upon request.
Pre-set device of the clamping pressure
HYDRAULIC YOKE / DROP END
- Hydraulically actuated.
- It allows to open the machine for removal of closed shells.
- Drop end is equipped with a conical bushing which surrounds the roller bearing mounted to the top roll shaft.

SAFETY DEVICES
- A multiple safety system stops all the machine movements.
- Davi rolls are made of select and certified high-grade forged carbon steel.
- Emergency stop button at the operator's console.
- Safety joystick controls:
- Perimeter safety cable along the machine sides; if activated, all machine movements stop instantly.
- Top grade electric and electronic components that meet industrial safety standards are supplied by world-class manufacturers.

OPTIONAL EQUIPMENT AVAILABLE UPON REQUEST
- CONE ROLLING PACKAGE SECTIONAL BENDING ATTACHMENT
  - Cone-shoe-guiding-die
  - Individual fast tilting of the side bending rolls
  - The low frame design of the machine makes smaller diameter cones possible.
  - The return to horizontal position is accurate and immediate; no need to re-adjust or re-set.
- HDC - HYDRAULIC DEFLECTION COMPENSATION DAVI CROWNING PATENT
  - It hydraulically compensates the deflection of the clamping rolls according to the plate width and thickness.

OTHER OPTIONAL ACCESSORIES
- EASY PRO Programmable Digital Readout
- Rolls induction surface hardened
- Interchangeable reduced diameter top roll
- Oil Cooler

EXCELLENCE IN FORMING
CNC DAVI SMART-PRO CNC DAVI LEONARDO
The New Leonardo is the most advanced CNC available today in the plate roll industry. Its powerful Intel Pentium processor self-programs itself fully automatically through Computer Program Mode to roll either single radius or multi-radii parts like oval, buckets, round-square, etc. It allows importing .dxf files directly from the office, and carries a real CAD station onboard. Package CAD-Creator-3D installed onboard allows the operator to design parts and roll them automatically CAD-CAM.
- Memory capacity up to 5000 programs;
- Unlimited number of axes can be controlled;
- Open system;
- Multiple serial ports: two USB, RS232, Ethernet, compact flash slot;
- Recommended to users that need to program as much as possible;
- Advanced diagnostics: with dedicated software and comprehensive troubleshooting guide;
- Advanced Tele-service: technical support online in real time connecting with Davi Tele Customer Service.
- Editor mode
- Memory capacity: 1000 programs 200 in the basic version;
- Unlimited number of axes can be controlled;
- Open system;
- Multiple serial ports: two USB, RS232, Ethernet, compact flash slot;
- Advanced diagnostics: with dedicated software and comprehensive troubleshooting guide;
- Advanced Tele-service: technical support online in real time connecting with Davi Tele Customer Service.

The SMART PRO is available also in the reduced BASIC version, the entry-level model, that doesn’t include the COMPUTER PROGRAM MODE.

EXCELLENCE IN FORMING

WHY CHOOSING A 4 ROLL DAVI

1. The flat end is the shortest: Excellent prebending thanks to the two central rolls that can take the edge to the shortest and precise tangent clamp.

2. Single Pass Sequence: The entire shell could be finished in one pass only, including prebending of both edges. One only side roll position, one only automatic squaring, and no plate handling required at all.

3. High automation degree - High production: Squaring, prebending, and rolling can be made, on the MCA, whilst keeping the plate always horizontal at the feeding: The possibility to use the optional gantry loader and an in-feed conveyor together with the HI-TECH DAVI's CNC makes the MCA the best solution to improve productivity, by shortening the cycle time and reducing the handwork needed for plate handling. The MCA becomes more than a simple rolling machine, the ideal solution to roll big quantities in the shortest time.

4. Coils: The 4 roll geometry helps to roll cones, as the bottom squaring clamping roll can be tilted and clamps the back edge of the plate against the back roll series as a real hydraulic back-gauge at the large diameter of the cone, feeding faster its long development. The cone attachment, at the contrary, guiding the shorter edge of the plate at the tight diameter of the cone to slightly rotate according to the cone geometry, slows down the feeding of its shorter development. Side rolls must be tilted to form the cone at its right geometry. Davi 4 roll have, as standard feature, the electronic bottom clamping and side rolls tilting, up to a level substantially higher than the competition.

5. Plate Transfer: Plate is always hydraulically pinched in between the two central rolls, thus providing constant and near-perfect positioning. The feeding of the plate is guaranteed by the hydraulic permanent clamp of the pinching rolls ensuring constant, accurate, and sure control of the position of the plate.

6. Single pass bending process: The simplest to be CNC programmed.

EXCELLENCE IN FORMING

WHY CHOOSING A 4 ROLL DAVI
THE FIRST RANGE OF ABSOLUTE BEST PREBENDING DIGITAL ROLLING MACHINES

Digital technology: 100% reliable, easy troubleshooting, teleservice online.

SWINGING GUIDES DAVI PSG
1988 Davi patent on 4 roll machines: Using the PSG system side rolls movement that is hinged on a strong central pin, the movement is therefore circular without any deflection.

STRENGTH AND PRECISION WITH NO FRICTION
The natural external reaction of the plate during bending is held inside the structure. This allows the machine to have a compact and less obtrusive structure while at the same time maintaining its strength and rigidity.

SMALL DIAMETER SHELLS
Wrapped around while pressed against the top roll on a longer plate section than on the linear guides, reducing the natural material spring-back re-opening effect. Much smaller diameter shells and cones are achievable up to and even less than times the top roll diameter, this means a 30% advantage in minimum diameter when compared to machines with linear guides. Maintenance-free swing guides are not damaged by the mill-scale. Premature wear due to the lack of regular maintenance is eliminated. They extend the life of the machine and increase its value over time. No lubrication required.

The above-mentioned capacities are based on mild steel with a maximum of 60,000 Psi UTS (Ultimate Tensile Strength) and 38,000 Psi yield strength, under the understanding that parts are formed in multiple passes to a diameter equal to or larger than 2.5 times the top roll diameter. Tighter diameters can be achieved depending on the thickness, width, or tensile strength. For different materials, capacities may vary from our standard.

Promau manufactures machines of all types and dimensions which, due to lack of space, cannot be published in full. Upon request, lines of all performance levels are available; Promau in fact has the technical, design, and production expertise to cope with any bending application.