Please use this identifier to cite or link to this item:
https://doi.org/10.1088/1757-899X/370/1/012025
DC Field | Value | |
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dc.title | Improving Coolant Effectiveness through Drill Design Optimization in Gundrilling | |
dc.contributor.author | Woon K.S. | |
dc.contributor.author | Tnay G.L. | |
dc.contributor.author | Rahman M. | |
dc.date.accessioned | 2019-03-21T05:58:00Z | |
dc.date.available | 2019-03-21T05:58:00Z | |
dc.date.issued | 2018 | |
dc.identifier.citation | Woon K.S., Tnay G.L., Rahman M. (2018). Improving Coolant Effectiveness through Drill Design Optimization in Gundrilling. IOP Conference Series: Materials Science and Engineering 370 (1) : 1-9. ScholarBank@NUS Repository. https://doi.org/10.1088/1757-899X/370/1/012025 | |
dc.identifier.issn | 17578981 | |
dc.identifier.uri | http://scholarbank.nus.edu.sg/handle/10635/152503 | |
dc.description.abstract | Effective coolant application is essential to prevent thermo-mechanical failures of gun drills. This paper presents a novel study that enhances coolant effectiveness in evacuating chips from the cutting zone using a computational fluid dynamic (CFD) method. Drag coefficients and transport behaviour over a wide range of Reynold numbers were first established through a series of vertical drop tests. With these, a CFD model was then developed and calibrated with a set of horizontal drilling tests. Using this CFD model, critical drill geometries that lead to poor chip evacuation including the nose grind contour, coolant hole configuration and shoulder dub-off angle in commercial gun drills are identified. From this study, a new design that consists a 20° inner edge, 15° outer edge, 0° shoulder dub-off and kidney-shaped coolant channel is proposed and experimentally proven to be more superior than all other commercial designs. © Published under licence by IOP Publishing Ltd. | |
dc.publisher | Institute of Physics Publishing | |
dc.source | Scopus | |
dc.type | Conference Paper | |
dc.contributor.department | MECHANICAL ENGINEERING | |
dc.description.doi | 10.1088/1757-899X/370/1/012025 | |
dc.description.sourcetitle | IOP Conference Series: Materials Science and Engineering | |
dc.description.volume | 370 | |
dc.description.issue | 1 | |
dc.description.page | 1-9 | |
dc.published.state | published | |
Appears in Collections: | Staff Publications Elements |
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012025.pdf | 1.67 MB | Adobe PDF | OPEN | None | View/Download |
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