The ERICHSEN Sheet Metal Testing Machine, Model 100, is a bench mounted unit with a cast iron machine body and a cylindrical test head. To conduct the cupping test the sheet metal specimen or foil is entered into an opening through the test head. The screw-in blankholder is set for the sheet thickness using the scale provided. The test head is then tightened manually against a stop on the locating sleeve. This clamps the blank with a force of 10 kN as required by the cupping test standards mentioned above. The clutch pin is pulled outwards from the locating sleeve, the test head is turned clockwise and the cupping process commences. The cupping test value reached is displayed on a digital counter. The forming process and the appearance of the crack can be observed conveniently looking down onto the blank holder.
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