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Influence of a defined pre-load on the stress state in the precision cutting process

Einfluss einer definierten Vorspannung auf den Spannungszustand beim Genauschneiden
: Neugebauer, Reimund; Kräusel, Verena; Barthel, Tom; Jesche, Fred; Schönherr, Julia


CIRP Annals. Manufacturing Technology 62 (2013), No.1, pp.271-274
ISSN: 0007-8506
International Academy for Production Engineering (CIRP General Assembly) <63, 2013, Copenhagen>
Journal Article, Conference Paper
Fraunhofer IWU ()
punching; Streß; quality of cutting surfaces

Precision cutting is a single stroke shear cutting process to achieve a flush-cut amount between 60 and 90% of the sheet thickness by using a single-acting standard press. This paper presents a method to quantify the amount of required compression stresses based on theoretical and experimental precision cutting tests in which the stress state is overlaid by an additional radial pre-load on the strip. It was found that even a minimal pre-load of 30% of the yield stress can move the stress level to a state with lower tensile stress.