ERICHSEN CUPPING TEST PDF

The main aim of which is to protect the health of our employees, customers and partners. Therefore, in accordance with the established safety guidelines, we will remain operational even in these particularly sensitive moments and continue to work with you. Keep healthy and safe! For almost years a test method to determine the level of quality of sheet metal exists. Abraham M. Erickson is considered the inventor of the cupping test and he patented this test method in the early 20th Century.

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This article provides answers to the following questions, among others: What is the cupping test according to Erichsen? What is cold formability? Sheets for deep-drawing applications must have very good cold formability, i. Corresponding deformation characteristics from the tensile test such as elongation at break and reduction in area have only limited significance at this point, since the tensile test permits only low degrees of deformation due to the relatively massive specimen.

Sheets, on the other hand, are formed many times more strongly and are subject to a multi-axial stress during loading. For this reason, sheets are subjected to a special technological test, the so-called cupping test according to Erichsen , to characterize their deep-drawing capability.

A steel ball with a diameter of 20 mm is pressed into a plate, which is held in position by a blank holder. As the force increases, the ball is pressed in more and more and the sheet metal bulges out — in contrast to the Brinell hardness test — on the opposite side.

The cupping test can be used to test sheets up to 3 mm thick. Figure: Cupping test But not only the deepening is used to characterize the deep-drawing ability but also the appearance of the deep-drawn sample. Thus, the sheet surface may become very roughened during the test, which can be undesirable in some cases despite good deepening.

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This article provides answers to the following questions, among others: What is the cupping test according to Erichsen? What is cold formability? Sheets for deep-drawing applications must have very good cold formability, i. Corresponding deformation characteristics from the tensile test such as elongation at break and reduction in area have only limited significance at this point, since the tensile test permits only low degrees of deformation due to the relatively massive specimen.

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Blog What is the Significance Cupping Test? Cupping test is a significant test to assess the ductile properties of the metal. In this test, a punching force is applied to the metal sheet of thickness from 0. A visual inspection is done to see if the test material has developed any cracks or deformity.

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