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.   

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.   

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.      

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.    

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.   

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.      

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.     

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.      

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.    

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.      

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

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

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       

Maintenance Options
Central lubrication - Automatic       

  Roll Options   Polished Rolls    Additional Smaller Diameter Top Roll Welding on the machine - NO STANDARD    

Roll Options
Polished Rolls   
Additional Smaller Diameter Top Roll
Welding on the machine - NO STANDARD

 

Machine Specs