dc.contributor.author	Adler, W. Alexander III	en
dc.contributor.committeechair	Reinholtz, Charles F.	en
dc.contributor.committeemember	Mitchell, Larry D.	en
dc.contributor.committeemember	Saunders, William R.	en
dc.contributor.department	Mechanical Engineering	en
dc.date.accessioned	2014-03-14T20:51:31Z	en
dc.date.adate	1998-05-28	en
dc.date.available	2014-03-14T20:51:31Z	en
dc.date.issued	1998-05-18	en
dc.date.rdate	1999-05-28	en
dc.date.sdate	1998-05-18	en
dc.description.abstract	This 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
dc.description.degree	Master of Science	en
dc.identifier.other	etd-42698-205111	en
dc.identifier.sourceurl	http://scholar.lib.vt.edu/theses/available/etd-42698-205111/	en
dc.identifier.uri	http://hdl.handle.net/10919/36701	en
dc.language.iso	en	en
dc.publisher	Virginia Tech	en
dc.relation.haspart	title.pdf	en
dc.relation.haspart	intro.pdf	en
dc.relation.haspart	chapter_1.pdf	en
dc.relation.haspart	chapter_2.pdf	en
dc.relation.haspart	chapter_3.pdf	en
dc.relation.haspart	chapter_4.pdf	en
dc.relation.haspart	chapter_5.pdf	en
dc.relation.haspart	chapter_6.pdf	en
dc.relation.haspart	chapter_7.pdf	en
dc.relation.haspart	refrences.pdf	en
dc.relation.haspart	appendix.pdf	en
dc.rights	In Copyright	en
dc.rights.uri	http://rightsstatements.org/vocab/InC/1.0/	en
dc.subject	Phillips	en
dc.subject	Screwdriver Bit	en
dc.subject	Cam-Out	en
dc.subject	Surface Contact	en
dc.subject	Tool Wear	en
dc.subject	User Emulation	en
dc.title	Testing and Understanding Screwdriver Bit Wear	en
dc.type	Thesis	en
thesis.degree.discipline	Mechanical Engineering	en
thesis.degree.grantor	Virginia Polytechnic Institute and State University	en
thesis.degree.level	masters	en
thesis.degree.name	Master of Science	en

Testing and Understanding Screwdriver Bit Wear

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