Electro-hydraulic weld seam testing machine ERICHSEN
200 kN

Electro-hydraulically driven Weld Seam Testing Machine, Model 138


A testing machine made to the demand of several customers, to determine the properties of weld seams of Tailored Blanks. These are sheets "made-to-measure" enabling the production of components with optimum weight and function used to a great extent in the manufacture of automobiles to reduce weight. The high-strength metal sheets used require a high punch force for the deep-drawing test. The weld seam testing machine is a special version of our Universal Sheet Metal Testing Machine, Model 142-20, and is provided with a drawing force of max. 200 kN. The four-column frame with integrated test tool enables the test of sheets up to 300 mm wide. The infinitely variable blank holder force can be read on a pressure gauge whilst the deep-drawing index and the required drawing force are displayed digitally. The sensitivity of the integrated crack detector can be adjusted to the sheet metal quality by way of a potentiometer. After specimen failure the machine returns automatically to its initial position. To evaluate and store the measured data, it is possible to connect the machine to a PC using the corresponding interfaces. The Windows based software calculates and displays the measured values from the ERICHSEN cupping test, e. g. index E, elongation at rupture E in %, tensile strength E, n-value E. Furthermore the force-displacement diagram is recorded. Several tests can be shown in a chart.

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