激光与光电子学进展, 2020, 57 (5): 051402, 网络出版: 2020-03-05   

VITA MARK II牙科玻璃陶瓷超快激光铣削工艺 下载: 1261次

Ultra-Fast Laser Milling Technology for VITA MARK II Dental Glass Ceramics
作者单位
1 深圳大学应用技术学院, 广东 深圳 518000
2 深圳技术大学中德智能制造学院数字化口腔激光智能制造重点实验室, 广东 深圳 518118
3 大族激光科技产业集团股份有限公司光源事业部, 广东 深圳 518000
摘要
使用5 W红外飞秒激光器对牙科全瓷修复中常用的玻璃陶瓷材料VITA MARK II进行铣削加工实验,系统研究超快激光加工工艺参数对铣削效率以及铣削效果的影响,并利用5 W红外飞秒激光器实验结果对20 W红外飞秒激光器铣削效率进行模拟预估。实验结果表明,在激光重复频率为100 kHz,扫描速度为200 mm/s,扫描间距为0.01 mm的条件下,5 W红外飞秒激光器对VITA MARK II陶瓷的铣削效率最高,为0.0409 mm 3/s。加工后的VITA MARK II陶瓷粗糙度为3~5 μm,崩边量在50 μm以内,斜坡量在100 μm以内。该牙科玻璃陶瓷的激光切割阈值约为0.72 J/cm 2。推算出20 W红外飞秒激光器对VITA MARK II陶瓷的铣削效率为0.1558 mm 3/s。上述实验论证了5 W激光切割牙科玻璃陶瓷的可行性及有效性,可为20 W红外飞秒激光铣削实验样机的搭建提供参考。
Abstract
VITA MARK II, a commonly used dental glass ceramic material, is typically milled using a 5-W infrared femtosecond laser. The effects of ultra-fast laser process parameters on milling efficiency and milling effects are systematically studied, and the 20-W infrared femtosecond laser prepared for future test prototype is estimated using the experimental results of 5-W infrared femtosecond laser. The experimental results show that the milling efficiency of the 5-W infrared femtosecond laser on VITA MARK II ceramics is 0.0409 mm 3/s when the laser repetition frequency is 100 kHz, the scanning speed is 200 mm/s, and the scanning interval is 0.01 mm. The roughness of VITA MARK II ceramics treated by femtosecond laser is ranged within 3--5 μm, the margin gap is approximately 50 μm, and the slope quantity is within 100 μm. The laser cutting threshold of VITA MARK II dental glass ceramics is 0.72 J/cm 2. It is estimated that the milling efficiency of 20-W infrared femtosecond laser on VITA MARK II ceramics would be 0.1558 mm 3/s. Therefore, this experiment demonstrates the feasibility and effectiveness of laser cutting dental glass ceramics, providing a reference for the construction of the test prototype.

胡培鑫, 姚路, 吕启涛, 吉恩才, 聂子林, 何正娣. VITA MARK II牙科玻璃陶瓷超快激光铣削工艺[J]. 激光与光电子学进展, 2020, 57(5): 051402. Peixin Hu, Lu Yao, Qitao Lü, Encai Ji, Zilin Nie, Zhengdi He. Ultra-Fast Laser Milling Technology for VITA MARK II Dental Glass Ceramics[J]. Laser & Optoelectronics Progress, 2020, 57(5): 051402.

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