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Process capability requirement under maximum material condition

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dc.contributor.author Diplaris, SC en
dc.contributor.author Sfantsikopoulos, MM en
dc.date.accessioned 2014-03-01T01:24:53Z
dc.date.available 2014-03-01T01:24:53Z
dc.date.issued 2006 en
dc.identifier.issn 0954-4054 en
dc.identifier.uri http://hdl.handle.net/123456789/17493
dc.subject geometrical tolerancing en
dc.subject position tolerance en
dc.subject process capability en
dc.subject machining cost en
dc.subject.classification Engineering, Manufacturing en
dc.subject.classification Engineering, Mechanical en
dc.subject.other INDEXES en
dc.title Process capability requirement under maximum material condition en
heal.type journalArticle en
heal.identifier.primary 10.1243/09544054B08604 en
heal.identifier.secondary http://dx.doi.org/10.1243/09544054B08604 en
heal.language English en
heal.publicationDate 2006 en
heal.abstract A frequently used geometrical tolerance is the position tolerance. When it is assigned at the maximum material condition (MMC), an increase in the position tolerance is allowed, equal to the departure of the particular feature from the maximum material condition size. Neither concept - position tolerance and maximum material condition - analytically related with the exact coordinate dimensions that locate the feature. A feature position is usually allocated on the basis of its theoretically exact co-ordinate dimensions, whereas positional accuracy is pursued through an appropriate planning of the machining process in conjunction with appropriate machine tool(s) and/or jig(s). Exploitation of the MMC tolerance bonus is taken into account mainly during part inspection in order to reduce rejects. Such an approach is not systematic, considering that the MMC benefits are not taken directly into account in the process planning stage in order to control the overall process cost. In this paper, the permitted manufacturing errors of a feature size and position are considered and studied simultaneously in an analytical way. It is shown that a lower process capability (PC) requirement can then be established that leads to a significant process cost reduction. An application example demonstrates the use of the method and the obtained results are discussed. en
heal.publisher PROFESSIONAL ENGINEERING PUBLISHING LTD en
heal.journalName PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART B-JOURNAL OF ENGINEERING MANUFACTURE en
dc.identifier.doi 10.1243/09544054B08604 en
dc.identifier.isi ISI:000242652200007 en
dc.identifier.volume 220 en
dc.identifier.issue 10 en
dc.identifier.spage 1629 en
dc.identifier.epage 1634 en


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