Key advantages of GW CNC Stretchbenders

  • 20 years of experience in CNC machines and bending tools
  • more than 260 machines built and sold since 1999
  • Customer support in choosing the right equipment and production strategy
  • Average production volume per year ~350.000 for each machine
  • Stretchforce 10 kN up to 800 kN in 2D and 3D movement
  • Cycletime down to 20 seconds
  • Universal CNC bending machine, changeover to different projects is possible
  • Service engineers in Europe and China



  • 100% industry style CNC control Siemens 840D
  • Parker/Rexroth direct controlled high performance Servovalves
  • Rexroth integrated digital Measurementsystem comparable to high precision glass-scales, but contactless, inductive and robust. Accuracy up to +-3 ym/m, Position resolution up to 0.025 ym

  • Closed loop control of position and force
  • 100% full hardware interpolation of hydraulic and electric axes. No software solution.
  • Industry highest repeatability of <=0.05 mm in production mode for hydraulic and electric axes.
  • Position accuracy of each individual hydraulic CNC axis: < 0.02 mm
  • Position accuracy of each individual electric CNC axis: < 0.01 mm

  • Components dimensions checked by modern FEM Systems
  • Possible integration of automatic mandrel handling or Airpressure systems
  • Integrated noise insulated hydraulic system with energy saving pressure reservoir
  • Made in Germany . All main components from German/European suppliers
  • Steelframe and all other GW made elements are strong and reliable designed
  • Integration in external components, communication to company network
  • direct control of handling robots and external components can be integrated into the CNC with one programming interface
  • Operator safety is high priority with light guards, stop valves and external position controlled stop valves.
  • Our machines comply with the new European Machinery Directive 2006/42 / EC
  • Machine software design open for future updates
  • Profinet connection for future development



  • Hydraulic and electric controlled axes in mixed mode
  • Displacement and force control. Hybrid mixed mode available
  • Free sequence programming for optimum cycle time for each project
  • Easy changeover for new project. Quick changeover for project-project available
  • Process parameters can be checked online
  • Different material can be considered in program changes
  • direct control of handling robots and external applications can be integrated into the CNC with one programming interface
  • Full remote control and diagnosis
  • Easy teaching of new programs or corrections
  • Switchover from Force to Position controlled bending program
  • HMI interface in Chinese/English/German and additional languages
  • Operator training and production accompaniment on site available.
  • Automatic in process material measurement possible (EGM/ELM)
  • StressStrain curvature of materials can be generated




  • no active arm movement, therefore less energy and lower cycle time
  • Main bending axis is the table movement. Very high precision and repeatably
  • Optimized design considering floorspace requirements
  • Clamping heads with Quick change system
  • Hydraulic and pneumatic functions for tool operations (forming/cutting)
  • Electrical connections for sensors and checks

    Loading Position

    End of forming operation