Erichsen Cupping Testing Machine

Model: GBW Series
Description:
GBW series Erichsen Cupping Testing Machine is designed on the basis of screw universal material testing machine. The Erichsen Cupping Tester is suitable for cupping test of metal sheet and strip steel rolled stock etc to evaluate the plastic deformation performance and ductility. The cupping test for metal sheet thickness range is 0.1mm to 5mm, Max. punching capacity is 300KN, and the pre-tightening device is optional either with hydraulic servo loading pump or manual loading pump.

Applied Standard

  • 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.


Load Frame

● 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

● Photoelectric 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 onclick.


Superior Load Frame Design

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.

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.


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. 



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

ModelGBW-100MGBW-100AGBW-300A
Max. Cupping Load100KN100KN300KN
Load accuracy±0.5%
Stroke speed0.005-250mm/min
Speed accuracy±0.5%
Thickness of sheet0.1-2mm (standard) 2.0-3.0mm (non-standard)0.1-2mm (standard) 2.0-5.0mm (non-standard)
Max. of sheet material110mm140mm
Die specificationPunch ball: φ20±0.05mm Pattern Hole: φ33±0.1mm Fixed pattern hole: φ27±0.05mmPunch ball: φ20±0.05mm Pattern Hole: φ27±0.05mm Fixed pattern hole: φ33±0.1mm
Non-standard Die specificationPunch ball: φ20, φ15, φ8mm Pattern Hole: φ40, φ21, φ11mm Fixed pattern hole: φ33, φ18, φ10mmPunch ball: φ20, φ15, φ8mm Pattern Hole: φ40, φ21, φ11mm Fixed pattern hole: φ33, φ18, φ10mm
Max. Clamping load10kN manual10kN close-loop10kN close-loop
Cupping value resolution0.01mm


Video

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