Roundo PAS, PASS, PASC 4 roll plate bending machines

ROUNDO 4 ROll Plate Bending Machines
Type PAS PASS PASC
ROUNDO is the world's leading manufacturer of plate and section bending machines. The company was formed in 1964, and has since delivered more than 15 000 machines to satisfied customers around the globe. ROUNDO machines are world renowned for outstanding performance, reliability and quality.
Wide range of Machines
The standard range of 4 roll plate bending machines covers plate thicknesses from 3 mm to 100 mm and widths from 1 000 mm to 8 000 mm 3 to 26. All machines have unique features needed for high precision and high output rates
Outstanding prebending capacities. In many cases, the
remaining flat end is as short as one time the plate thickness.
Fully hydraulic, infinitely variable speed drive and adjustment of the rolls.
Highest drive torque of any competitive machine.
Frames made of high strength steel, fully welded and stress relieved before machining to have sufficient strength to absorb bending forces and to achieve highest possible accuracy.
Built as standard with such mechanical precision and rigidity that all machines can be epuipped with CNC control.
Excellent forcone bending, including prebending ofcone plate.
Easy to integrate into a production line when equipped with automatic infeeding ofthe plates, automatic ejection and down line transport of the finished cylinder.

Construction
Machines from ROUNDO are always more powerful and more heavily proportioned in terms of frame, roll size, bearings and drive torque than machines from other suppliers. The result is higher reliability, higher precision and longer service life.
The Rolls and Bearings
The rolls are manufactured of high carbon content steel forgings for maximum surface hardness. The rolls are crowned to fit the largest possible thickness range within the capacity of the machine. To increase the thickness range further, the machines can be equipped with support rolls for the lower roll. For machines used for bending stainless steel or when frequent cone bending is anticipated, hardened and ground rolls are recommended. To avoid cracking and warping issues, the rolls are hardened using the preferred 7 step surface hardening process, followed by precision grinding and polishing. All rolls on ROUNDO plate bending machines are journalled in speherical roller bearings of the highest quality, resulting in minimal friction losses and longer service life. In addition, the rolls can easily be tilted to achieve the best result in operations such as cone bending.
Ensured Parallelism
The parallelism of the rolls is one of the most crucial factors in achieving good bending results and is absolutely essential for optimal use of CNC controls. This is ensured on all ROUNDO machines, even under maximum load. On PASS machines, the lower roll is adjusted by wedge blocks and a hydraulic cylinder, as shown to the right. This adjustment is very accurate and guarantees perfect parallelism of the rolls. On PAS machines, the parallelism of the lower roll and both side rolls is electronically regulated by the digital control system. A precision glass scale linear encoder, fitted to each end of the rolls, monitors the exact position of the roll. This trouble free system ensures parallelism under all conditions and makes it possible to easily tilt the rolls for cone bending. Hydraulic Drive and High Drive Torque All machines have fully hydraulic roll rotation, side roll and lower roll adjustment and drop end control. Combined with infinitely variable speed adjustment, the operator will have full control of the process in any bending situation.
The high drive torque makes it possible to prebend with maximum capacity and to bend a plate with maximum plate thickness down to a small radius in only one pass. All ROUNDO 4 roll plate bending machines have precise control of the speed difference between top roll and lower roll in all situations.

For Maximum Performance
Efficient multiple production of simple cylinders or complex parts is the main advantage of a CNC control. With its unique capability to control up to 12 axes, ROUNDO's CNC system can control not only the rotation and the positioning of the rolls, but also the crowning effect of the support rolls, material support and lifting devices, and even tilt the side rolls during the bending operation, a feature unique to the ROUNDO CNC control. Where automatic infeeding of the plates and automatic ejection are required, the whole automatic process can be controlled by the CNC system.
Precise Positioning
The CNC system controls the machine and positioning of rolls with the highest possible precision. We guarantee a positioning within 0,1 mm of the side rolls and lower roll, even under varying load. These tight tolerances, unmatched by any competitive machine, are a direct result of the high mechanical precision and rigidity of the machine.
Easy to Use
With clear commands and preset functions, the operator can create programs in a simple, yet logical way. Programs can also be created
via the Teach in function. Our unique geometry program enables users to create programs directly from drawings, and to quickly calculate the position of the side rolls to achieve a given radius. The interpolation function allows the machine to simultaneously rotate and change position of one of the side rolls, achieving varying radil and smooth transitions on the plate. For detailed information
about our CNC system, ask for our separate CNC leaflet

ROUNDO 4 roll plate bending machines equipped with CNC control and lifting roll with ejection device are ideal for manufacturing of cylinders, ovals and square shaped objects. With the lifting roll, overlap of the leading plate edge during the last part of the bending sequence is effectively avoided. After completion of the bending process, the part can be automatically ejected from the machine. Larger 4 roll machines are successfully used for production of all types of cylinders, for tanks, boilers etc.
Towers for wind mills with a slightly conical shape are often produced in ROUNDO PAS machines.

Complete production line for production of fuel tanks. Includes PASS 150, automatic infeeding of plates off a stack and automatic outfeeding of the finished
tank body. Equipped with bar code reader for automatic change of CNC program to correspond to the actual plate being placed on the infeeding table, resulting
in true just in time production.

Accessories
All ROUNDO 4 roll plate bending machines can be equipped with a wide range of accessories to increase the versatility of the machine
Hydraulically operated side support can be mounted on one or both sides of the machine
Electro mechanically or hydraulically operated top support
Lifting roll
Ejection device
Cone bending device
lnterchangeable top roll
Adjustable support rolls for the lower roll
Full CNC control
Electronic positioning system
PLC control
lnfeeding systems
Other customized accessories

ROUNDO
4 Roll Plate Bending Machine
Type PASC
The type PASC is a 4 roll plate bending machine with reduced cost due to simplified hydraulic and electronic systems. Thìs is a viable, cost effective option in situations where slightly reduced versatility compared with PAS and PASS is accepted. PASC has the same prebending and circular bending capacities as the corresponding PAS and PASS model.

The motor power is valid for machines in standard execution. For machines with CNC control or other options the installed power will increase.
Weight for basic machine without optional equipment.
The capacities are based on normal steel with yield point 270 N/mm2.
The minimum bending diameter is 1,1 1,4 x the top roll diameter depending on plate thickness.
Remaining straight end after prebending 1,5 2 x plate thickness.
Other machine lengths can be delivered on request.
All data subject to change without prior notice.

3 Roll Plate Bending Machines
The standard range of 3 roll plate bending machines covers plate thicknesses of 3 100 mm 1/8 to 4 and widths of 1 000 8 000 mm.

Section Bending Machines
Largest selection of section bending machines on the market, with over 20 standard sizes.

Section Bending Machines
The larger sizes of section bending machines are designed also for bending 1, U and H beams the hard way. The world's largest section bending machine, can bend up to HE 800 the hard way.

Quick Roiling Machines
Plate bending machines for large production runs of cylinders with cycle times as short as 10 sec. For plate thicknesses up to 12 mm and widths to up about 2 000 mm

Flanging and Punching Machines
For flanging and punching cylinders in the same operation. Cylinder diameters of 350 3 000 mm 14 to 120 and plate thicknesses up to 8 mm.

Plate straightening Machines straighten plates with thicknesses of 2 40 mm and widths up to 4 000 mm 13. Produced with 5, 7 or 9 rolls depending on tolerance requirement