The influence of speed on material removal mechanism in high speed grinding with single grit |
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| Affiliation: | 1. College of Materials Science and Engineering, Nanjing Forestry University, Nanjing 210037, China;2. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China;3. Nanjing Engineering Institute of Aircraft Systems, Jincheng,(AVIC), Aviation Key Laboratory of Science and Technology on Aero Electromechanical System Integration, Nanjing 211106, China;1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, PR China;2. Laboratory for Precision and Nano Processing Technologies, School of Mechanical and Manufacturing Engineering, The University of New South Wales, NSW 2052, Australia;1. College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, 210016, PR China;2. Institute of Advanced Manufacturing Technology, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Changzhou, 213164, PR China;1. The Grinding Doc, San Antonio, TX, USA;2. Centre for Research onAdaptive Nanostructures and Nanodevices (CRANN) & Advanced Materials Bio-Engineering Research Centre (AMBER), Ireland;3. Trinity College Dublin, Dublin 2, Ireland |
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| Abstract: | In this paper, the effect of speed on material removal was investigated by single grit grinding of the GH4169 super alloy which is difficult to machine, with a new test method. During the tests the whole material removal process, was observed and then the critical thickness of chip formation was quantitatively analyzed. In order to provide insight into the speed effect, the grinding forces, chip formation and pile-up ratio were investigated. It was found that the stages of material removal process changed with the grinding speed, and the graphical relationships between grinding speed and the critical thickness of chip formation, grinding forces and the pile-up ratio were found to have a common characteristic, namely a common turnover point which was about 100 m/s. This trend in the results is attributed to alternating predominance between the strain hardening and thermal softening effects. The results of this study demonstrated that the grinding speed has a significant impact on material removal mechanism, and also provide a basis for sound understanding of the high speed grinding process of difficult to cut materials. |
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| Keywords: | High speed grinding Single-grit Material removal process Critical thickness of chip formation Chip GH4169 |
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