davi-barcode-mcb-four roll

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E L L E N C E I N F O R M I N G

D A V I M C B : 4 R O L L

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WHY CHOOSINGHY CHOOSINGA 4 ROLL ? 4 ROLL ?

1) The flat end is the shortest (excellent prebending)thanks to the two central rolls that can take the edge tothe precise tangent clamp.

2) Single Pass SequenceThe entire shell could be finished in one pass only, including prebending ofboth edges.

ONE only side roll position, one only automatic squaring, and no plate handlingrequired at all.


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E X C E L L E N C E I N F O R M I N G

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3) Squaring

Automatic and instantaneous, plate is squaredagainst the back roll (a real hydraulicback-gauge).

4) Plate Transfer

Plate is always hydraulically pinched in betweenthe 2 central rolls, constant and perfectpositioning.

5) Handling Devices

Squaring, pre-bending and rolling can bemade whilst keeping the plate always horizontalat the feeding: possibility to have gantry loadersand in-feed conveyors to improve productivity.

6) Cones

The 4 roll geometry helps to roll cones, as thebottom clamping roll can be tilted and clampsthe back edge of the plate (at the large diameter

of the cone), feeding faster its long development.The cone attachment, at the contrary, guidingthe shorter edge of the plate (at the tight diameterof the cone) to slightly rotate according with thecome geometry, slows down the feeding of itsshorter development.

Side rolls must be tilted to form the cone at itsright geometry.

Davi 4 roll have, as standard feature, theelectronic bottom clamping and side rolls tilting,up to a level substantial higher than the

competition (Davi exclusive and benefit).

7) CNC Applications

4 roll is the most suitable machine for CNC: instantautomatic squaring: reliable start position, ideal

to be CNC programmed, as positive mechanicalreference. The feeding of the plate is guaranteedby the hydraulic permanent clamp of the pinchingrolls ensuring a constant, accurate and surecontrol of the position of the plate.Single pass bending process: the simplest to beCNC programmed.


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D A V I M C B : T H E R I G H T M A C H I N E

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F O R A N Y B E N D I N G

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R E Q U I R E M E N T

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LARGE BAR AND FLANGES ROLLING MACHINESARGE BAR AND FLANGES ROLLING MACHINES

TUBE AND PIPE MANUFACTURE UP TO 12UBE AND PIPE MANUFACTURE UP TO 12METERS LONGETERS LONG

MCBCBROLLINGOLLING

MACHINEACHINE6.000 X 50 mm.000 X 50 mm

CONICAL SHAPESNICAL SHAPES

SHELLS FOR TRUCKHELLS FOR TRUCKCARRIAGES AND LIQUIDARRIAGES AND LIQUID

CARRIERSARRIERS

BOILERS AND HEATOILERS AND HEATEXCHANGERSXCHANGERS


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A U T O M A T I O N

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CNC DAVI SMART-PRO

Recommended to users that need to program assimple as possible single radius parts.

This innovative CNC, thanks to its powerful IntelPentium processor, is selfprogramming,complete automatically , through the ComputerProgram Modeany single radius shape (the multiradii parts can be programmed Teach-in or inEditor mode).

Unlimited number of axiscan be controlled (open system);

Multiple Serial Ports:two USB, RS232, Ethernet, compact flash slot;

Advanced diagnostic:with dedicated software and comprehensive

trouble-shooting guide;Advanced Tele-service:technical support online in real time connectingwith Davi Tele Customer Service.

CNC DAVI LEONARDO

The New Leonardo , is the mostadvanced CNC available today in the plateroll industry.Its powerful Intel Pentium processorself-programs itself full automatically(through Computer Program Mode) to roll eithersingle radius than multi-radii parts(like oval, buckets, round-square, etc.)It allows to import .dxf files directly from theoffice, and carries a real CAD station onboard.

Package CAD-Creator-3D installed on-board,that allows the operator to designparts and roll them automatically (CAD-CAM);

Memory capacity up to 5000 programs;

Unlimited number of axis can be controlled(open system);

Multiple Serial Ports: two USB, RS232, Ethernet,compact flash slot;

Advanced diagnostic: with dedicated softwareand comprehensive troubleshooting guide;

Advanced Tele-service: technical support onlinein real time connecting with DaviTele Customer Service.

ALL DAVI CNC BENEFIT FROMLL DAVI CNC BENEFIT FROMTHE NEW ROLL-BY-WIREHE NEW ROLL-BY-WIRE


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X C E L L E N C E I N F O R M I N G

I N N O V A T E T O I M P R O V E

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INNOVATE TO IMPROVENNOVATE TO IMPROVE

The R&D is able to customize the basicmachine to interface with several automatingaccessories and make the line more effectivein terms of reductions in down time,cycle times and number of resourcesrequired to manage the process.

The MCB is ideal for high production and automated bendhe MCB is ideal for high production and automated bend

MCB rolls to automform rounded tanksmultiple radii on trua u t o m o b i l e s.

S ignificant imprgnificant impr ovements mentsin prn pr oductivity arductivity ar e onl onl ypossiblssibl e with a high-t with a high-t ech hmachineachine .The MCB inche MCB inc orprp or r at t es als al l the themost rost r ecent t nt t echnolhnol ogicalgicalinnonno vations in bendingtions in bendingtechnol hnol ogy and algy and al lows wsuserser s t t o r r each prach pr oductionduction

levels hithert ls hithert ounthinknthink ablbl e.


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Vertical MCB machine.

Special soft materialsmachine for examplebending Alucobond .


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T E C H N O

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TECHNOLOGY RELIABILITYECHNOLOGY RELIABILITY

U se of modern technologicale of modern technologicaltools has allowed us toools has allowed us to

produce a productroduce a productwhich combines RELIABILITYhich combines RELIABILITY

with SIMPLICITY this meansith SIMPLICITY this meansvery HIGH PRECISIONery HIGH PRECISION

in rolls positioning,crucialn rolls positioning,crucialin the quality bending process.n the quality bending process.

m) and in high production environments suchmm) and in high production environments such


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W H Y C H O O S I N G A 4 R O L L

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WHY CHOOSING A 4 ROLL DAVI MCB ?HY CHOOSING A 4 ROLL DAVI MCB ?

SWINGING GUIDES DAVI PSG(1988 Davi patent on 4 roll machines):

The PSG system is based on the side rolls movementthat is hinged on a strong central pin, themovement is therefore a circular movementaround this central hinged point, without anylinear friction at all.Structure of the machineThe natural external reaction of the plate duringbending is held inside the structure.This allows the machine to have a compactand less obtrusive structure, whilst at the sametime maintaining its strength.

SMALL DIAMETER SHELLS

Wr a p p e d a r o u n d

w h i l s t pressed againstthe top roll, on a longerplate section than onthe linear guides,reducing the naturalmaterial spring-backreopening effect.Much smaller diametershells (and cones) areachievable (upto and even less than1.1 times the top rolldiameter), this meansa 30% advantage inminimum diameter,when comparedmachines with linearguides.

NO Lubrication

NO DEFLECTION

Using the PSG system has enables the machineto hold the traction forces inside the structure,without any outside deflection.Strength and precision with no frictionThe rolls movement is rigid and stable but at thesame time roundand fluid, the lack of friction

allows absolute accuracy.Originally born from the concept of high precisionplanetary geardrives, that concept has todaybeen adopted by all modern hightech rollsmanufacturers (e.g. Scandinavian and German)and on practically all reputable brands of sectionbenders.

DAVI SWINGING GUIDES

They completely eliminate the slipping slidingfriction for side rolls movement.No need of maintenance at allThey are not damaged by the mill-scale.Premature wear due to the lack of regularmaintenance is eliminated.They extend the life of the machine and increaseits value through the time.


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A D V A N T A G E S O F T H E D A V I

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ADVANTAGESDVANTAGESF THE DAVI PSG SYSTEMF THE DAVI PSG SYSTEM

DISADVANTAGESISADVANTAGESOF THE OLD LINEAR GUIDESF THE OLD LINEAR GUIDES

1) Best pre-bending (shortest flat end)

The DAVI planetary swing guide technology

allows the operator to obtain absolutelythe best results in pre-bending.

The side roll rounds the plateedge starting their stroke froma more external position,swinging up during the raisingphase as it nears the top roll.The plate edge is thereforepre-bentandrounded with a higherleverage arm, getting morestrength on the material to beformed, more prebending power, greatlyreducing the remaining flat end.The edge is therefore free from angles,peaks or straight line segments betweenbends, thanks to the longer roundedsection.The flat end remaining will be aproximatley40-50% shorter than on other rolls with linearguides.

) Greater Power is available (bending capacityof the machine)

B e n d i n g p owe r i n c r e a s e i s d i s t r i b u t e dh omo g e n e o u s l y irrespective of shell

diameters, even duringpre-bending.

During the swinging movementhe roll raises up with a beneficialnd constant positive leverage.

This geometric movementmultiplies the power of the hydraulicylinder thanks to the effect of leveragehat concentrates all the bendingpower in the pre-bending area thuseducing the length of thelat end.

) Tighter diameter cones are possible

The swinging guides allow you to keep thereated stress within the lower internal side of therame. It is then possible to roll smaller diameterones (much closer to the top roll diameter) ashere is no interference from the geometry of the

main frame.

Disadvantages of the old linear guides

The linear guides (that do notround or wraparoundthe roll), press at a pointwhich is closer to theclamping point:- the bending stroke is much tighter: the pre-bending results in an edgebend, with less power, rather than a curved;- the length of the flat end is double that when using the new swinging guide system!

Disadvantages of the obsoletelinear guides (still employedby other manufacturers).

Less power applied on smalldiameters and in thepre-bending area!Due to inclined straight linegeometry of the machine,the power of the cylinder is fixed(no leverage benefit allows aconstant load distribution).With inclined linear guidesthe max load is appliedwhere it is less useful(with the rolls at the lowestdown position).When the rolls raise the leverage reducesprogressively, with lesser power reducing theforming diameters.

Obsolete, previous linear guides

Linear guides for side rolls oblige a high andheavy frame to avoid it to deflect out-board.This avoid to roll to tight conesbecause they can physically touch thehigh parts of the frame.


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davi-barcode-mcb-four roll

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