1. brief introductions of erichsen cupping test machine
The WTB-60 computerized erichsen cupping test machine and earing tester is designed to do cupping test and earing test for sheet and strip metal materials according to test methods ISO 20482 metallic materials — sheet and strip— Erichsen cupping test and ISO 11531 metallic materials — sheet and strip— earing test.
erichsen cupping test machine
cupping testing
2. specifications of erichsen cupping test machine
No.
Item
Spec
1
Test specimen thickness
0.095-3mm
2
Stroke of punch
40mm
3
Max. punching force
60kN
4
Max. clamp force
10kN
5
Resolution of cupping index
0.0025mm
6
Test attachment for cupping test(for test piece with width or diameter more than 60mm)
See table 1
7
Test attachment for earing test
See table 2
8
Test speed
5-20mm/min
9
Auto stop functions
Yes
10
Hydraulic oil
N46 hydraulic oil (prepared by client)
11
Dimension
780x760x1450mm
12
Voltage
AC380V,50Hz
13
Weight
420kg
Table 1: specimen thickness and tools for cupping test,specimen width or diameter more than 90mm
Item
Spec
Thickness of test piece
0.095-2mm
2-3mm
Bore diameter of the die
27±0.05mm
40±0.05mm
Punch diameter
20±0.05mm
Bore diameter of the blank holder
33±0.1mm
Table 2: die dimensions for earing test with punch diameter 33mm
Thickness of test piece
Inside diameter of die
Inside radius of die
Surface roughness
0.095-0.2mm
33.44mm
2.0mm(0,-0.2)
0.1um
0.2-0.4mm
33.88mm
2.5mm(+0.2,0)
0.1um
0.4-0.8mm
34.76mm
3.5mm(+0.2,0)
0.8um
0.8-1.6mm
36.52mm
5.0mm(+0.2,0)
0.8um
1.6-3mm
39.60mm
7.0mm(+0.2,0)
1.6um
Key Features of erichsen cupping tester
High-precision mechanical or digital measurement of the cupping depth
Adjustable clamping pressure and punch speed for different materials and coatings
Robust construction with corrosion-resistant frame and long service life
Easy-to-read digital display (in digital models) for accurate and repeatable readings
Compliance with multiple standards for paint, varnish, and metal sheet testing
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