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    Modeling Machining Geometric Variation in a N-2-1 Fixturing Scheme

    Source: Journal of Manufacturing Science and Engineering:;2006:;volume( 128 ):;issue: 001::page 213
    Author:
    Weiping Zhong
    ,
    S. Jack Hu
    DOI: 10.1115/1.2114927
    Publisher: The American Society of Mechanical Engineers (ASME)
    Abstract: Fixtures are used to locate and constrain workpieces in machining. Fixture properties, such as accuracy and locator layout schemes, directly affect the resultant geometric variation on the machined workpiece surfaces. N-2-1 fixturing schemes (N>3) are often used for large or compliant workpieces in machining. However, the impact of N-2-1 fixturing on product geometric variation is not well understood because of the uncertainty of contact under the overconstraint condition. This paper presents a modeling methodology to study the machining geometric variation in a 4-2-1 fixturing scheme. The model integrates the fixture-workpiece interactions resulted from the rigid-body variation in fixtures, workpieces, and machine tools, and the static deformation under external forces. The uncertainty of the fixture-workpiece contact condition due to the 4-2-1 constraint condition is modeled using the minimum potential energy theory. A numerical example of face milling is presented to demonstrate the methodology.
    keyword(s): Machining , Fixturing , Modeling , Jigs and fixtures , Deformation AND Force ,
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      Modeling Machining Geometric Variation in a N-2-1 Fixturing Scheme

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    http://yetl.yabesh.ir/yetl1/handle/yetl/134220
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    contributor authorWeiping Zhong
    contributor authorS. Jack Hu
    date accessioned2017-05-09T00:20:49Z
    date available2017-05-09T00:20:49Z
    date copyrightFebruary, 2006
    date issued2006
    identifier issn1087-1357
    identifier otherJMSEFK-27914#213_1.pdf
    identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/134220
    description abstractFixtures are used to locate and constrain workpieces in machining. Fixture properties, such as accuracy and locator layout schemes, directly affect the resultant geometric variation on the machined workpiece surfaces. N-2-1 fixturing schemes (N>3) are often used for large or compliant workpieces in machining. However, the impact of N-2-1 fixturing on product geometric variation is not well understood because of the uncertainty of contact under the overconstraint condition. This paper presents a modeling methodology to study the machining geometric variation in a 4-2-1 fixturing scheme. The model integrates the fixture-workpiece interactions resulted from the rigid-body variation in fixtures, workpieces, and machine tools, and the static deformation under external forces. The uncertainty of the fixture-workpiece contact condition due to the 4-2-1 constraint condition is modeled using the minimum potential energy theory. A numerical example of face milling is presented to demonstrate the methodology.
    publisherThe American Society of Mechanical Engineers (ASME)
    titleModeling Machining Geometric Variation in a N-2-1 Fixturing Scheme
    typeJournal Paper
    journal volume128
    journal issue1
    journal titleJournal of Manufacturing Science and Engineering
    identifier doi10.1115/1.2114927
    journal fristpage213
    journal lastpage219
    identifier eissn1528-8935
    keywordsMachining
    keywordsFixturing
    keywordsModeling
    keywordsJigs and fixtures
    keywordsDeformation AND Force
    treeJournal of Manufacturing Science and Engineering:;2006:;volume( 128 ):;issue: 001
    contenttypeFulltext
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    DSpace software copyright © 2002-2015  DuraSpace
    نرم افزار کتابخانه دیجیتال "دی اسپیس" فارسی شده توسط یابش برای کتابخانه های ایرانی | تماس با یابش
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