Effect of Punch Diameter, Grid Dimension, and Lubrication on Forming Limit Diagram

    Volume 34, Issue 1 (January 2006)

    ISSN: 0090-3973

    CODEN: JTEOAD

    Published Online: 5 December 2005

    Page Count: 7


    Casari, F
    Ph.D. Student, University of Trento, Trento,

    Tassan, M
    Manufacturing Group-Trento Branch-Technologies Division, Centro Richerche FIAT, Orbassano, TO

    Messina, A
    Director of Marketing & Manufacturing-Trento Branch-Technologies Division, Centro Ricerche FIAT, Orbassano, TO

    Molinari, A
    Full Professor, University of Trento, Trento,

    (Received 24 June 2004; accepted 3 August 2005)

    Abstract

    A reduced punch Nakazima Formability Testing equipment has been designed in order to get the forming limit diagram (FLD) of metal sheets using presses or testing machines with low load capability. Due to the limiting punch load of 100 kN, a punch diameter of 50 mm was selected; the FLD obtained with this equipment are in agreement with results obtained by means of similar facilities using the same operative conditions (i.e., grid dimension and lubrication) but standard punch diameter (100–110 mm). The influence of grid dimension and lubrication condition on the intercept FLD0 has been evaluated. Particularly, friction coefficients for the lubrication conditions used in the formability test were measured by means of Strip Friction Testing equipment


    Paper ID: JTE12669

    DOI: 10.1520/JTE12669

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    Author
    Title Effect of Punch Diameter, Grid Dimension, and Lubrication on Forming Limit Diagram
    Symposium , 0000-00-00
    Committee E28