Drilling of Glass Filled Resin Bonded Materials


[Master of Philosophy thesis]. Glass Reinforced Plastic (G.R.P.) laminated sheets have been in use for a number of years and can be drilled using H.S.S. drills although drill wear takes place at a high rate giving an inferior hole quality and delamination of the sheet at the exit side of the hole and, under certain conditions, at the entry side of the hole also. The object of this project was to investigate the drilling of G.R.P. laminated sheet and to make recommendations for good drilling practice when using H.S.S. twist drills. Although of a nominally specified amount, the glass content was found to vary considerably between the sheets used. The sheet with the lower glass content (60.78%) was used to determine the effect of variation in drill penetration rate using standard drills while the sheet with the higher glass content (74.32%) presented much more severe drilling problems through early discolouration of the hole and was used therefore to study the effects of variation in drill geometry on cutting performance. The tests carried out have been quantified in terms of drill quality through the measureable parameters of torque, thrust and drill wear with the establishment of empirical torque and material removal factor (M.R.F.) values and hole quality through the measurable parameters of change in size, shape and surface finish.

Divisions: College of Engineering & Physical Sciences
Additional Information: Copyright © John Henry Wylde, 1979. John Henry Wylde asserts his moral right to be identified as the author of this thesis. This copy of the thesis has been supplied on condition that anyone who consults it is understood to recognise that its copyright rests with its author and that no quotation from the thesis and no information derived from it may be published without appropriate permission or acknowledgement. If you have discovered material in Aston Publications Explorer which is unlawful e.g. breaches copyright, (either yours or that of a third party) or any other law, including but not limited to those relating to patent, trademark, confidentiality, data protection, obscenity, defamation, libel, then please read our Takedown Policy and contact the service immediately.
Institution: Aston University
Uncontrolled Keywords: Glass filled polymers,Drilling
Last Modified: 08 Dec 2023 08:48
Date Deposited: 27 Mar 2014 15:00
Completed Date: 1979-09
Authors: Wylde, John Henry

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