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CSME 2020/04
Volume 41 No.2
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121-130
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Study on Rotary Ultrasonic Machining and its Predictive Model of Cutting Force on Dental Zirconia Ceramics
Kan Zhenga, Xing-Zhi Xiaoa, Wen-He Liaoa, Song Donga and Shi-Hao Liub
aSchool of Mechanical Engineering, Nanjing University of Science & Technology, Nanjing, China 210094, PRC.
bMechanical and Electrical Engineering College, Hainan University, Haikou, China 570228, PRC.
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Abstract:
Based on the disadvantages existed in the machining of zirconia ceramic crowns, such as complicated process of sintering and difficulties in controlling shrinkage rate, the method of rotary ultrasonic machining (RUM) in sintered zirconia ceramic crowns has been proposed. The experiments of RUM have been conducted in terms of machining requirements and the failure mode of zirconia ceramic crowns. According to the influences of cutting parameters on machining qualities in different machining methods, the effect mechanism of cutting force on the labial margin edge quality and the surface damage of crowns have been revealed. Therefore, in order to control the labial margin edge quality and the surface damage effectively, a cutting force predictive model has been built based on the partial least squares (PLS) during RUM. The average error between experimental results and predictive results is only 8.23%, which indicates that the model can be applied to guide the RUM of dental zirconia ceramics for dentists.
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Keywords: Zirconia ceramics, dental restorations, rotary ultrasonic machining, partial least squares, cutting force predictive model.
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©
2020
CSME , ISSN 0257-9731
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