Applications:

The Cupping testing Machine (Erichsen Tester) is precise technology testing machine which is used for thin sheet metal & strip steel rolled stock etc. It can complete test of plastic deformation for thin sheet metal & strip steel rolled stock.

Test Principle:

A punch with a spherical end is pressed against a specimen clamped in the pad and the film to form a dent until a penetrating crack appears, and the depth of the indentation measured by the displacement of the punch is the test result. That is, a certain specification of steel ball or spherical punch is used to apply pressure to the sample with 10kN clamping force around the sample until the sample produces a penetrating crack, and the punch indentation depth (mm) is the cupping value of the plate, which is used to judge the plastic deformation performance of the material.

Standards:

It conforms to ASTM E 643-78 & GB4156-84 “Testing Machine for Metal Cupping test”

Features:

Pre-clamping load: up to 10kN, read & calibrate directly from the computer.

Computer screen display test load from 1kN to 100kN in real time, the test accuracy is ±1%.

Resolution of Load cell & signal is more than 1/100000, measuring displacement with resolution of 0.01mm.

Test speed from 0.1mm/min to 200mm/min can be set freely, variable speed. One test finish, then ready to be for next test automatically. Easy to be operated.

The machine will show Clamping load, punching load, displacement and cupping value, test speed, test curve, etc.

Advantages:

1. The cupping testing machine adopts a new structural principle, which is a constant speed loading for the servo motor, which can realize constant rate control, and the stamping process is controlled by the PC computer, and the stamping speed can be stepless and predetermined.

2. The clamping force is loaded independently by the motor, the clamping force can be adjusted, the data is displayed synchronously, and the calibration can be done independently.

3. The force measuring device has been changed to a spoke-type sensor in the past, and the cupping value measurement is encoder measurement, combined with the spoke-type sensor (direct force measurement), which greatly improves the accuracy and reliability of the cupping value measured by the testing machine.

4. The cup protrusion fixture is easy to replace, the sample is easy to load and unload, after the sample is put in, the clamping can be completed by pressing the automatic button, the test parameters can be input and changed, the stamping process is fully automatic and completed with one key, no human influence, closed-loop control can be realized, the stamping force value is reduced to judge the automatic parking of the sample crack, and it is easy to observe the test process at the same time, and the cup protrusion value at the moment of crack can be more accurately judged.

5. The test data is displayed by computer, and there is a peak memory function, that is, large punching pressure, cupping value, etc., to realize the report, storage, batch, curve drawing of test results, etc., and the deformation height is automatically remembered, and the end of a test can be automatically restored to the state to be tested

Specifications:

Thickness of sheet metal: 0.01-3mm (High precision load cell, it can complete extreme thin sheet metal)

Width of sheet metal: 90-100mm

Stroke of punch: 40mm

Max. Punching load: 100kN  

Max. clamping load: 10kN

Resolution of cupping value: 0.01mm

Specifications of cupping grips  

l Standard Punch ball: φ20±0.05mm

l Standard Cushion mold hole Dia.: φ33±0.1mm  

l Standard fixed mold hole Dia.: φ27±0.05mm

Special accessories can be special ordered.

Dimension: 650×800×1200 mm

Power: AC 220V 0.75KW

Weight: 450Kg

Standard Accessories:

Load frame: 1 set

Cupping test fixtures: 1 set

Standard Punch ball: φ20±0.05mm

Standard Cushion mold hole Dia.: φ33±0.1mm  

Standard fixed mold hole Dia.: φ27±0.05mm

Load cell: 2 pcs

Photoelectric encoder: 1 set

Clamping system: 1 set

Computer and English version software (For details, please see Annex-1): 1 set

Printer: 1 set