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