Abstract
Freeform surface grinding is one of the commonly used dental medical manufacturing processes. In dentistry machining, zirconia is one of main workpieces used for artificial teeth. Machining process for grinding of the ceramic usually takes a long time. In order to reduce this production time, it is critical to apply proper grinding parameters while maintaining high quality of machined artificial teeth. Required material removal rate (MRR) for workpiece can be used to determine the grinding parameters. However, it has been hard to find grinding parameters achieving a proper MRR of complex 3D models like as human teeth. In this study, MRR is predicted by using geometric data in the engagement region between machining bur and its workpiece while the MRR varies all along the tool path. Simulations of the machining time shows that the machining time can be reduced by adjusting the bur’s feed rate to maintain the predicted MRR.
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This work is supported by DDS, Inc., in Seoul, Korea. In part, this work is also supported by Priority Research Program (NRF-2018R1A6A1A03025526) through National Research Foundation of Korea (NRF) under Ministry of Education, Science, and Technology.
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Sangbeom Nam received his M.S. from School of Mechatronics Engineering, Korea University of Technology and Education in 2019, where he is also in seeking of his Ph.D. His research interests include machining of materials, dental crown machining and application.
Byungki Kim received the B.S. degree from Yonsei University, the M.S. degree from KAIST, South Korea, and the Ph.D. degree from the Georgia Institute of Technology, Atlanta, GA, USA, all in mechanical engineering. He was an Assistant Professor of Mechanical Engineering with the University of Massachusetts, Lowell, MA, USA. He is currently an Associate Professor of Mechatronics Engineering with the Korea University of Technology and Education. His research interest includes nanocomposites, smart materials, and micro systems.
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Nam, S., Kim, B. Design of material removal rate to reduce machining time of dental crown. J Mech Sci Technol 33, 3423–3434 (2019). https://doi.org/10.1007/s12206-019-0637-y
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DOI: https://doi.org/10.1007/s12206-019-0637-y