Electro-Hydraulic Control Cold Bending Testing Machine

  • GB/T 232-1999 Bending test method for metallic materials, GB 1499.2-2007 Steel for the reinforcement of concrete—Part 2:Hot rolled ribbed bars and YB/T 5126-2003 Steel bars for reinforcement of concrete—Bend and re-bend tests, ASTM A615, ASTM A615M, BS 4449, ISO 7438 and ISO8491 etc


  • • Frame structure: it adopts a vertical structure with smaller footprint, and sample can be easily placed. 

    • Loading system: it adopts hydraulically-loaded vertical structure with three-cylinder design, main cylinder moves from top to bottom, and bending point position is more accurate than the horizontal structure, the left and right cylinders perform lateral pressure on specimen, and specimen falls freely after completing 180 degrees. 

    • Bending roller adjustment method: electrically adjust the bending support roller by buttons in the panel area (it automatically stops after reaching the position, equipped with safety devices & more accurate).

    • Work efficiency: adopt a vertical structure, steel bars are placed directly on the bending rollers, and multiple specimens can be made at the same time. 


  • Configuration:

    • Load frame with touch screen control panel

    • Safety cabinet (transparent organic glass)

    • Bending supporter

    • Bending Mandrel

    • Bending mandrel seat


    Bending fixture


    Electro-Hydraulic1.jpg


    Re-bending fixture

    Electro-Hydraulic2.jpg


    Optional bending fixture for steel tube

    Electro-Hydraulic3.jpg

  • • Maximum test force: 200kN

    • Bending span: 5-400mm

    • Support roller diameter: dia. 80mm

    • Diameter range for round sample: dia. 6-50mm

    • Thickness range for flat sample: 6-40mm

    • Main piston stroke: 280mm

    • Side piston stroke: 225mm

    • Main piston moving speed: >400mm/min;

    • Side piston no-load moving speed: >400mm/min

    • Span adjustment accuracy: 0.1mm

    • Maximum span: 450mm

    • Bending range: 180°, 90°, 60°, etc. at any angle

    • Standard bending mandrels: 18, 24, 30, 32, 40, 48, 56, 60, 64, 70, 72, 80, 88, 90, 100, 110, 125, 140, 160, 168, 180, 192mm (others upon request)

    • Frame structure: three-cylinder, three-station design

    • Control method: Touch screen intelligent control

    • Roller span adjustment: scale pointer type electric adjustment

    • Power supply: single-phase AC220V/0.75kW

    • Overall dimensions: 1900x730x1850mm

    • Weight: 1000kg



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Model GWB-200V
Hydraulic Bending and Re-bending Testing Machine is a special equipment to perform bending test on reinforced bar, steel bar and pipe etc.