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dc.contributor.authorAdler, W. Alexander IIIen_US
dc.date.accessioned2014-03-14T20:51:31Z
dc.date.available2014-03-14T20:51:31Z
dc.date.issued1998-05-18en_US
dc.identifier.otheretd-42698-205111en_US
dc.identifier.urihttp://hdl.handle.net/10919/36701
dc.description.abstractThis thesis is focused on gaining a better knowledge of how to design and test Phillips screwdriver bits. Wear is the primary concern in applications where the bit is used in a power driver. Such applications include drywalling, decking and other construction and home projects. To pursue an optimal design, designers must have an understanding how the bit geometry changes with wear. To make use of the geometrical data, the designer must also have an understanding of the fundamentals of the bit/screw surface contact and its effect on force distribution. This thesis focuses on three areas. First, understanding how the tool and bit are used, and what factors contribute to bit wear. With this understanding, a test rig has been designed to emulate typical users and, in doing so, produce the factors that cause wear. Second, there must be a means to analyze geometric changes in the bit as it wears. A method for doing this was developed and demonstrated for a Phillips bit, but the process can be applied to other bits. Finally, the fundamentals of surface contact must be understood in order to apply the geometrical information obtained to improved bit design.en_US
dc.publisherVirginia Techen_US
dc.relation.hasparttitle.pdfen_US
dc.relation.haspartintro.pdfen_US
dc.relation.haspartchapter_1.pdfen_US
dc.relation.haspartchapter_2.pdfen_US
dc.relation.haspartchapter_3.pdfen_US
dc.relation.haspartchapter_4.pdfen_US
dc.relation.haspartchapter_5.pdfen_US
dc.relation.haspartchapter_6.pdfen_US
dc.relation.haspartchapter_7.pdfen_US
dc.relation.haspartrefrences.pdfen_US
dc.relation.haspartappendix.pdfen_US
dc.rightsI hereby grant to Virginia Tech or its agents the right to archive and to make available my thesis or dissertation in whole or in part in the University Libraries in all forms of media, now or hereafter known. I retain all proprietary rights, such as patent rights. I also retain the right to use in future works (such as articles or books) all or part of this thesis or dissertation.en_US
dc.subjectPhillipsen_US
dc.subjectScrewdriver Biten_US
dc.subjectCam-Outen_US
dc.subjectSurface Contacten_US
dc.subjectTool Wearen_US
dc.subjectUser Emulationen_US
dc.titleTesting and Understanding Screwdriver Bit Wearen_US
dc.typeThesisen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.description.degreeMaster of Scienceen_US
thesis.degree.nameMaster of Scienceen_US
thesis.degree.levelmastersen_US
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen_US
thesis.degree.disciplineMechanical Engineeringen_US
dc.contributor.committeechairReinholtz, Charles F.en_US
dc.contributor.committeememberMitchell, Larry D.en_US
dc.contributor.committeememberSaunders, William R.en_US
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-42698-205111/en_US
dc.date.sdate1998-05-18en_US
dc.date.rdate1999-05-28
dc.date.adate1998-05-28en_US


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