Automatic Type Cupping Testing Machine

Model:GWB-60C
Description:
The digital cupping tester is mainly used in the test of metal sheets and thin strips. The automatic cupping testing machine can test the plastic deformation performance of the sheets and thin strips. The automatic cupping testing machine meets the requirement of international GB/T 4156-2007 "Metal Material Sheet and Thin Strip Erichsen Cupping Test”.
Adopting a hydraulic clamping and hydraulic stamping composite oil cylinder, the cupping tester automatically shuts down when a test sample has crack, so as to facilitate the observation of crack. With peak value memorizing function, the cupping tester can automatically memorize the maximal stamping force and the maximal deformation depth. A turning type clamp ensures the convenient replacement, assembling and disassembling of a punch and a test sample.

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

1. Pre-loading test force: 10-25 kN, read & calibrate directly from meter.

2. Computer screen display, test load from 600N to 60kN in real time, the test accuracy is ±1% .

3. Resolution of Load cell & signal is more than 1/100000, measuring displacement with encoder with resolution 0.001mm.

4. Test speed from 2 mm/min to 100mm/min can be set freely, variable speed. One test finish, then ready to be for next test automatically. Easy to be operated

5. It’ll display test load of cupping test & cupping value.

Superior Load Frame Design

  • Main frame: including: high precision & low noise lead screw, speed regulating system & servo motor

  • Computer control system with software, high precision encoder with 0.001mm resolution.

  • Hydraulic clamping device and servo control system

  • Standard cupping test mould: 1set (including 1 punch, 1 pad mould and 1 fixing mould)



Features of TE Measuring & Control software for cupping test

TE software refers to the software characteristics of the top manufacturers of testing machine in the world and proposals of various testing requirements from the end users, and combines all the advantages of former versions of software with lots of new features. Optimized software structure makes the testing operation easy, convenient and powerful.



The control modes, test data and curves can be displayed in real time in the main interface and can be shifted at any time.


Other Options:

Fixtures for Deep Drawing Test

Specimen thickness: 0.45-5.0mm

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

Punching ball: dia. 50mm

Female Die Vs. Specimen thickness 


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



Fixtures for hole expansion test KWI



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

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




Please see the separate catalog for camera system & FLD diagram system 

Specification

Thickness of Steel PlateStandard Cupping Test 0.1-2mm (nonstandard cupping test 0.1-3mm)
Max. cupping load (kN)60
Max. clamping load (kN)25
Max. of sheet material (mm)100
Max. stroke of punch (mm)60
Stroke of clamping piston (mm)19-21
Die specification (mm)

Diameter of standard punch:φ20±0.05Aperture of standard cushion die: 

 φ33±0.1 Aperture of standard compression die:φ27±0.05; (non-calibration production)

Digital display resolution (mm)0.01
Digital display modeBy computer and software
Display contentsClamping force, stamping force, displacement, cupping value and velocity
Control modeautomatic judgment and recording of cupping value
Structural characteristicsHydraulic servo system for clamping load and servo motor for cupping load with double controls


This standard applies to deep impact test of non-ferrous metal sheet and deep drawing cup test of tapes with thickness from 0.1mm to 3.00mm and inspects the symmetrical ear-shaped bulges (earring ratio test) formed by anisotropy of rolling sheets and tapes.


Video

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