Model GBW-600 Erichsen Metal Sheet Testing Machine for FLC, FLD

    • Erichsen cupping test: EN ISO 20482, ASTM E 643, GB/T 4156. 

    • Deep drawing cups test: GB/T5125 GB/T 15825.3.

    • Earing test: ISO 11531, EN 1669, GB24183, GB/T 15825.6.

    • Hole expansion test (KWI TEST): ISO 16630, GB/T 24524, GB/T 15825.4.

    • Dent Resistance test: GB/T 34477.

    • Forming-limit Diagram (FLD) & Forming-limit Curve (FLC)-Nakajima Test: ASTM E2218, ISO 12004, GB 24171, GB/T 15825.8.


  • ● Constant punching speed control, testing speed variable.

    ● Constant clamping force by the Servo hydraulic cylinder, no slippage during the test. 

    ● High precision load cell for force measuring.

    ● High precision encoder for measuring the displacement of punching head.

    ● High control accuracy and fast response to stop the punching head instantly.

    ● Dual servo systems (punching & constant clamping force) integrated in one machine.

    ● High automation: after setting the test parameter, the testing can be done with one click.


  • Erichsen Cupping Test as per EN ISO 20482, ASTM E 643, GB/T 4156


    Application：

    Erichsen cupping test is one kind of processing property test by punching-press mode, which is used to determine the deep drawing property of metallic sheet materials and strip steel rolled stock. It is suitable for determination of the metallic sheet or strip steel rolled stock with thickness of 0.1mm~0.2mm and width no less than 90mm to bear the plastic deformation under drawing & shaping. 



    Specification:

    ● Thickness of sheet: 0.1-2mm.

    ● Maximum width of sheet:≥90mm.

    ● Specifications of cupping moulds

    Standard Punch ball:φ20±0.05mm.

    Standard Pattern Hole:φ33±0.1mm.

    Standard Fixed pattern hole:φ27±0.05mm.

    ● Test clamping force: 10KN.

    ● Resolution of cupping value: 0.01mm.

    1.jpg

    Broken cupping specimen    


    Deep Drawing Cups Test as per GB/T5125 (Optional)


    Application:

    Deep drawing cup forming test is one kind of test method by taking “Limit Drawing Ratio” to evaluate the sheet metal drawing formability. This fixture is suitable for deep drawing formability of sheet metal with thickness of 0.45mm~4.0mm.


    Specification:

    ● Specimen thickness: 0.45-2.0mm (WDW-100 with ACP-100), 0.45-4.0mm (WDW-300 with ACP-300).

    ● Recommended specimen diameter: 80mm, 85mm, 90mm and 95mm.

    ● Specimen thickness Vs. female die.

    20230830152603362.jpg@!w1200

    Forming Specimens


    Specimen thickness (mm)Female Die Inner diameter (mm)
    0.45~0.6451.80
    0.64~0.9152.56
    0.91~1.3053.64
    1.30~1.8655.20
    1.86~2.5057.00


    Earing Test as per ISO 11531, EN 1669, GB24183 (Optional)


    Application

    Earing test is a method for determining the ear height of metal sheet and strip of nominal thickness from 0,1 mm to 3 mm after deep drawing by measuring the height of any earing with an accuracy of ± 0,05 mm. 


    3.jpg


    Hole expansion (KWI test) as per ISO 16630, GB/T 24524 (Optional)


    Application

    Hole expansion test is a method of determining the hole expansion ratio in metallic sheets and strips with a thickness range of 1,2 mm to 6,0 mm inclusive and a width of at least 90 mm. This test is normally applicable to sheet metal and is used to assess the suitability of the product for forming flanges.


    4.jpg


    Dent Resistance test as per GB/T 34477 (Optional)


    ●Measure the surface deformation by video extensometer in 3D full-field.

    ●Check the biaxial tension pre deformation to reach 2%.

    ●Deformation of the surface.


    5.jpg


    Forming-limit Diagram (FLD) & Forming-limit Curve (FLC)-Nakajima Test as per ASTM E2218, ISO 12004, GB 24171 (Optional)


    Fixtures for FLC/FLD test, as per ASTM E 2218

    With Optical measuring system to acquire FLD diagram & FLC curve:


    6.jpg

    7.jpg

  • Specification:

    Test force range: 2.4-600kN

    Maximum punching force: 600kN

    Maximum clamping force: 600kN

    Force accuracy: +/-0.5%

    Force resolution: 0.001kN

    Punching stroke: >120mm

    Clamping piston stroke: >60mm

    Punching stroke resolution: 0.025um

    Clamping stroke resolution: 0.001mm

    Test speed: 0.01-1000mm/min

    Speed resolution: 0.01mm/min

    Maximum width of metal sheet: 220mm

    Maximum diameter of metal sheet: dia. 220mm

    Test range that can be achieved with this machine:

    Cupping test for standard: thickness: 0.1-2.0mm

    Cupping test for non-standard: thickness: 2.0-6mm

    Deep drawing cups test: thickness: 0.45-5mm

    Hole expansion test: thickness 0.2-4mm

    FLC/FLD test: thickness: 0.2-2.5mm

    Punching load mode: servo motor closed-loop control

    Clamping load mode: hydraulic servo closed-loop control

    Power supply: 380V, 3PH, 50Hz, 8kW

    Dimension: 1250x1100x1850mm

    Weight: approx. 2400kg


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GBW series Erichsen Metal Sheet Testing Machine is designed on the basis of screw universal material testing machine, using the servo motor for highly accurate loading for punching, meanwhile, it is equipped with hydraulic servo control system for pre-tightening/clamping of metal sheet. It is ideal to evaluate the plastic deformation performance and ductility of metal sheet & strip materials. The cupping test for metal sheet thickness range is 0.1mm-5mm, Max. Punching capacity is 600KN, and the pre-tightening/clamping device is with hydraulic servo loading pump for 600kN capacity;