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 Cupping Test

Cupping Test

To conduct this test, a sheet metal specimen is clamped between a blank holder and a die and then dented (deep-drawn) with a hardened spherical punch. This procedure is continued at a prescribed speed until it results in a fine, continuous crack in the sheet metal. The displacement of the spherical punch till cracking occurs is known as the cupping index >>IE<<, and represents a significant quality attribute of the tested sheet metal. This fast, cost-effective testing method is just as suit-able for use inincoming inspection as for in-process controls – and that without any lengthy specimen preparation.

Cupping Test

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