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    Deep Drawing With Blank Holder Force Approximately Proportional to the Punch Force

    Source: Journal of Manufacturing Science and Engineering:;1990:;volume( 112 ):;issue: 003::page 278
    Author:
    S. Thiruvarudchelvan
    ,
    W. G. Lewis
    DOI: 10.1115/1.2899587
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: A new method of applying blank holding force approximately proportional to the punch force in cup drawing is presented. An annular urethane pad compressed between two parts of a punch expands and applies pressure against the tubular part of a blank holder. As the punch moves to draw the blank, friction between the urethane pad and the blank holder applies automatically a blank holding force approximately proportional to the punch force. Experimental investigations were carried out with aluminum blanks to determine the optimum conditions to obtain wrinkle-free cups. Variations of the punch force and the blank holding force with punch stroke for aluminum blanks under different degrees of wrinkling are presented. Strains on the cup wall measured with this method are presented and compared with those obtained under constant blank holding force conditions. Theoretical critical blank holding pressure variation with punch stroke is compared with the pressure variation that obtains with the present method. Using the deep drawing theory an expression to predict the punch force with this method is also presented.
    keyword(s): Force , Blanks , Pressure , Aluminum , Urethane elastomers AND Friction ,
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      Deep Drawing With Blank Holder Force Approximately Proportional to the Punch Force

    URI
    http://yetl.yabesh.ir/yetl1/handle/yetl/107165
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    • Journal of Manufacturing Science and Engineering

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    contributor authorS. Thiruvarudchelvan
    contributor authorW. G. Lewis
    date accessioned2017-05-08T23:33:03Z
    date available2017-05-08T23:33:03Z
    date copyrightAugust, 1990
    date issued1990
    identifier issn1087-1357
    identifier otherJMSEFK-27744#278_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/107165
    description abstractA new method of applying blank holding force approximately proportional to the punch force in cup drawing is presented. An annular urethane pad compressed between two parts of a punch expands and applies pressure against the tubular part of a blank holder. As the punch moves to draw the blank, friction between the urethane pad and the blank holder applies automatically a blank holding force approximately proportional to the punch force. Experimental investigations were carried out with aluminum blanks to determine the optimum conditions to obtain wrinkle-free cups. Variations of the punch force and the blank holding force with punch stroke for aluminum blanks under different degrees of wrinkling are presented. Strains on the cup wall measured with this method are presented and compared with those obtained under constant blank holding force conditions. Theoretical critical blank holding pressure variation with punch stroke is compared with the pressure variation that obtains with the present method. Using the deep drawing theory an expression to predict the punch force with this method is also presented.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleDeep Drawing With Blank Holder Force Approximately Proportional to the Punch Force
    typeJournal Paper
    journal volume112
    journal issue3
    journal titleJournal of Manufacturing Science and Engineering
    identifier doi10.1115/1.2899587
    journal fristpage278
    journal lastpage285
    identifier eissn1528-8935
    keywordsForce
    keywordsBlanks
    keywordsPressure
    keywordsAluminum
    keywordsUrethane elastomers AND Friction
    treeJournal of Manufacturing Science and Engineering:;1990:;volume( 112 ):;issue: 003
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
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