超声振动辅助磨削完全烧结氧化锆陶瓷牙冠的实验研究  

Tests for ultrasonic vibration assisted grinding of sintered zirconia ceramics crowns

作　　者：郑侃[1] 肖行志[1] 廖文和[1] 

机构地区：[1]南京理工大学机械工程学院,南京210094

出　　处：《振动与冲击》2014年第4期32-36,47,共6页Journal of Vibration and Shock

基　　金：国家自然科学基金项目(51305206);江苏省自然科学基金项目(BK2012402);中央高校基本科研业务费专项资金资助(2012XQTR001)

摘　　要：针对现有全锆牙在制作过程中存在二次烧结、收缩精度难以控制等问题,提出了采用超声振动辅助磨削完全烧结氧化锆陶瓷牙冠的方法。从理论分析的角度对其运动学特性进行了研究,并通过超声振动辅助磨削和普通金刚石磨削实验,对该方法的可行性进行了分析。结合牙冠的加工特点,重点研究了主轴转速对材料去除率、表面粗糙度以及最大边缘碎裂的影响规律。实验结果表明,超声振动辅助磨削不仅能提升材料的去除率,有效抑制出口边缘碎裂,同时降低了工件表面的粗糙度,是实现完全烧结氧化锆陶瓷牙冠高效低损伤加工的新方法。Aiming at machining problems of zirconia ceramics dental prosthesis,such as,complexly processing, difficult to control shrinkage and so on,a new method using ultrasonic vibration assisted grinding presintered zirconia ceramics crowns was proposed.Firstly,its macro kinematic characteristics were investigated with theoretical analysis. Then,tests for machining presintered zirconia ceramics with ultrasonic vibration assisted grinding and diamond grinding were conducted to analyze the feasibility of the new method.Effects of spindle speed on material removal rate,surface roughness and edge chipping size were studied,combined with the machining characteristics of dental prosthesis.The test results demonstrated that the ultrasonic vibration assisted grinding not only raises the material removal rate,but also reduces the surface roughness and restrains the edge chipping effectively,therefore,the ultrasonic vibration assisted grinding is a new method with higher efficiency and lower damage for machining presintered zirconia ceramics crowns.

关 键 词：完全烧结氧化锆陶瓷 牙冠 超声振动辅助磨削 金刚石磨削 材料去除率 表面粗糙度 边缘碎裂 

分 类 号：TG506.9[金属学及工艺—金属切削加工及机床]