HRB-3 SERIES
plate rollers
Heavy duty, robust 3-roll plate benders with all 3 rolls driven by hydraulic motors.
Standard Features
- CE-Norm for EU
- Control unit with digital readout
- Conical bending
- Induction hardened rolls
- Side rolls positioning from electronic synchronize PLC
- Bottom roll rigid mechanic synchronized
- Stress relieved steel contruction body
- Rolls seated with bearings
- Top roll hydraulic opening device
- Top rolls hydraulic motor driven and planetary gear box
- Side rolls hydramotor, diameter 360 and above gear box plus hydramotor
- Electrical and hydraulic protection against overloads
Features
Robust Machine body
The machine body is strengthen and lowered to minimise twisting and deformation. All components of the machine frame including the cross members are stress relieved after welding.
High Torque Drive System
DURMA plate rolls produce extremely high torque therefore you can bend the plate with fewer steps. All three rolls are powered by hydraulic motors thought a planetary reduction gearbox. The strong hydraulic brake system does not allow the plate to slip back. Pressure safety valves protect the hydraulic system from overload.
Digital Readout
As standard the DURMA range of 3—roll plate rolling machines have a digital readout display. The operator can quickly and easily view the position of up to 6 moving axes.
Planetary Swing Roll System
The side rolls are 2 independent axes which swing up in an orbit motion. This allows a DURMA machine to roll a drum as small as 1.2 times the top roll diameter.
Conical Bending System
Because of the strong machine frame, DURMA plate rolling machines boast conical bending capacities of 1.5 times the top roll diameter. Most other machines in the market can only achieve 3 times the top roll diameter.
Bearing System
The rolls are guided with roller bearings within bronze housings. This guiding system requires less lubrication with long term durability.
Electrical and Electronic System
Only the World leading electrical and electronic components are used in DURMA machines. The system has current overload protection components integrated into it.
Hardened Rolls and Crowning System
The rolls are manufactured for highly durable C45 grade carbon steel. They are manufacture on large CNC lathes with high precision. The working surfaces are induction hardened to HRC 54 ± 2. The rolls are machined with a crown to compensate for the deflection experienced during bending.
Hydraulic System
Only the World leading hydraulic valve components are used in DURMA machines. This ensures precision movements of all axes and high response speeds. The hydraulic system has pressure safety valves to protect the system from overload.
Optional Features
Polished Rolls
Variable speed control
Oil Coolant
Side supports at both side
Vertical support crane system (mechanical or hydraulics)
Material feeding table
Changeable top Roll for smaller diameters
Longer rolls for profile bending
Welding possibility on the machine
Preparation for Vertical support crane system
NC Control
In additional to the digital readout the NC control can be programmed but also features the “teach in” mode where the operator can record all steps. In automatic mode the machine we re-trace all steps. The NC controller has the ability to save up to 70 programs consisting of a maximum of 100 steps.
Top Support
Generally when the cylinder size is bigger than 1.5metres in diameter a top support is helpful
3M x 4 Ton hydraulic
4M x 4 Ton hydraulic
6M x 4 Ton hydraulic
Side Support System
BOTH sides. Ideal to aid on the infeed side and support the cylinder on the out feed side
Link to NC Control System
Maintenance Options
Central lubrication - Automatic
Roll Options
Polished Rolls
Additional Smaller Diameter Top Roll
Welding on the machine - NO STANDARD
Machine Specs
