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Modeling the mechanics and dynamics of arbitrary edge drills |
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| Affiliation: | 2. High Productivity Machining Laboratory, Institute of Aeronautics, Mechanical Engineering and Transportation, Irkutsk State Technical University, Irkutsk, Russia;1. Chalmers University of Technology, Department of Materials and Manufacturing Technology, SE412 96 Gothenburg, Sweden;2. AB Sandvik Coromant, R&D Materials and Processes, SE126 80 Stockholm, Sweden;1. School of Mechanical Engineering, North University of China, Taiyuan, 030051, China;2. School of Chemistry, Physics and Mechanical Engineering, Queensland University of Technology (QUT), Brisbane, QLD 4001, Australia;3. School of Computing, Engineering and Mathematics, Western Sydney University, Penrith, NSW 2751, Australia |
| Abstract: | This paper presents a new approach for modelling the cutting forces and chatter stability limits in drills with arbitrary lip geometry. The oblique cutting geometry at each point on the drill lip is modelled using parametric curve equations. The cutting force and process damping coefficients at different parts of the drill lip are identified empirically; the cutting force coefficients are identified from non-symmetric drilling tests, and the process damping coefficients are identified from chatter-free orthogonal turning tests. The presented approach provides a practical method for modelling the cutting forces and vibration stability without needing the detailed geometry of drill lips. The accuracy of presented model in predicting lateral and torsional-axial chatter stability limits is verified by conducting drilling tests using drills with various edge geometries. |
| Keywords: | Regenerative chatter Drilling Machine tool vibrations |
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