HRB-4 Series

Plate Roller

Accurate, easy to operate, 4-roll bending allowing double pre-bending (both ends of the plate) in one pass.  This is the most suitable configuration for CNC applications like elliptical bending.

Standard Features

  • Accurate, ease of operate, fastest roll bendings
  • Flat zone of the sheet edges is minimised
  • Pre-bending, conical bending and ellipse bending can be done easily
  • Double pre-bends (both ends) in one pass
  • Hydraulic and electrical systems have been safeguarded from overloads and
  • require minimum maintenance. Hydraulic and electrical components are modular
  • and designed according to world standards.
  • The sheet is controlled by tightening of top and bottom rolls
  • Most suitable bending operation for CNC applications.
  • More efficient for cycle times
  • User friendly operations without dependence to operator competence.

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.  The top and bottom 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.  The top and bottom 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.

  Planetary Swing Roll System   The side rolls are 2 independent axes which swing up in an orbit motion.  The orbit motion allows perfect pre-bends as well as minimises spring back.  This allows a DURMA machine to roll a drum as small as 1.1 times the top roll diameter. 

Planetary Swing Roll System 
The side rolls are 2 independent axes which swing up in an orbit motion.  The orbit motion allows perfect pre-bends as well as minimises spring back.  This allows a DURMA machine to roll a drum as small as 1.1 times the top roll diameter. 

  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  Highly durable carbon steel (C45) rolls are machined by CNC Lathes with high precision without creating notch effect.  Working surfaces of the rolls are induction hardened to HRC 54±2  Rolls are machined as crowning shape to compensate the deflections on the rolls during the bending.   

Hardened Rolls And Crowning System
Highly durable carbon steel (C45) rolls are machined by CNC Lathes with high precision without creating notch effect.  Working surfaces of the rolls are induction hardened to HRC 54±2  Rolls are machined as crowning shape to compensate the deflections on the rolls during the bending.

 

  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.   

 

 

  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.

  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. 

 

  Synchronized Roll System  The bottom roll pinches the different plate thicknesses without deformation.  The pinching rolls maintain parallelism by the hydraulic adjustable pressure torsion bar. 

Synchronized Roll System
The bottom roll pinches the different plate thicknesses without deformation.  The pinching rolls maintain parallelism by the hydraulic adjustable pressure torsion bar. 

  Digital Readout  As standard the DURMA range of 4—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 4—roll plate rolling machines have a digital readout display.  The operator can quickly and easily view the position of up to 6 moving axes.   

 

Optional Features

  • NC Control Unit
  • CNC Control Unit - Color - graphic Control
  • Polished Rolls
  • Variable speed control
  • Oil Coolant
  • Side supports at both side
  • Vertical support crane system (mechanical or hydraulics)
  • Changeable top Roll for smaller diameters
  • Longer rolls for profile bending
  • Welding possibility on the machine
  • Preparation for Vertical support crane system
  • Material feeding table
  • Special applications for Wind-tower production

CNC Control Unit

 
  NC Control Unit S530  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.  This NC Control Unit has a Colour TFT LCD 7” Screen   

NC Control Unit S530
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.  This NC Control Unit has a Colour TFT LCD 7” Screen

 

  CNC Control  S500 - Colour Graphics   Complex bending When complex bending is required e.g. elliptical shapes, you need to choose this controller.   

CNC Control  S500 - Colour Graphics
Complex bending
When complex bending is required e.g. elliptical shapes, you need to choose this controller.

 

  CNC Control  S500 - Colour Graphics

CNC Control  S500 - Colour Graphics

 
  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 3M x 6 Ton hydraulic 4M x 6 Ton hydraulic 6M x 6 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
3M x 6 Ton hydraulic
4M x 6 Ton hydraulic
6M x 6 Ton hydraulic

 

  Side Support System  Link to NC Control System

Side Support System
Link to NC Control System

  Roll Options  Polished Rolls    Additional Top Roll   

Roll Options
Polished Rolls   
Additional Top Roll

 

  Material Feeding Table  Motorised - L=3      

Material Feeding Table
Motorised - L=3

 

 

Machine Specs