Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1679335 | CIRP Annals - Manufacturing Technology | 2014 | 4 Pages |
Abstract
Straightness control in gundrilling of deep, thin-walled holes on Inconel-718 is challenging due to insufficiently explored phenomena governed by the tool edge radius effects. Such effects are activated by conservative drilling conditions for Inconel-718, which transforms the chip formation mode to a thrust-dominated mechanism. Critical changes in force generation are thus resulted, which affect the characteristics of drill deflection and thin wall deformation. In consequence, the drill's self-piloting capability deteriorates – leading to uncontrollable deflection and hole misalignment. A mechanistic model uniting the underlying force, drill deflection, wall deformation and process kinematics is proposed and substantiated, as well.
Keywords
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Physical Sciences and Engineering
Engineering
Industrial and Manufacturing Engineering
Authors
K.S. Woon, A. Chaudhari, M. Rahman, S. Wan, A. Senthil Kumar,