Cupping test according to Erichsen – ISO 20482

Erichsen cupping test

The Erichsen cupping test (DIN 50101, ISO 20482, ...) is used to determine the stretch-forming capacity of sheets and strips. This quick and inexpensive type of test is often used in incoming goods inspection and directly in production without lengthy sample preparation.

One of the world's best-known test methods for sheet metal, patented as early as 1913 by the founder of our company, is the Erichsen cupping test.

The Erichsen cupping test is used to determine the stretch-forming capacity of sheet metals in accordance with DIN EN 10139 and DIN EN 10130, which have a thickness of 0.1 mm to 2 mm and a width of 90 mm or more.

Test method

Deep drawing (stretch forming) is the name given to the deformation process of a sheet metal under biaxial stress. The sheet is deformed with a rigid tool.

The sheet to be tested is clamped between the sheet holder and the die and formed with a hardened ball punch. This process is continued at a specified speed until a fine, continuous crack appears in the sheet. The distance travelled by the ball punch to the crack is referred to as the indentation value "IE" (in mm) and represents an important quality feature of the tested sheet metal.

Test principle of the Erichsen cupping test

ERICHSEN Testing Equipment

ERICHSEN Sheet Metal Testing Machines are suitable for a large number of forming tests (Erichsen cupping tests, Deep drawing tests, Bulge tests, FLC tests, etc.).

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