摘要
提出了一种面向骨科移植材料的新型二维超声研抛装置,能将超声加工与医用材料加工相结合,不仅可对具有复杂表面形状的骨科移植产品的加工难点进行研究,且加工后形成表面结构,其产生的三维空间结构利于人体细胞组织附着、提高骨质诱导能力。该装置通过解析法与有限元法结合的方法设计,经有限元仿真的模态分析与谐响应分析,确定超声振子的实际尺寸参数和变幅杆上的凹槽尺寸,得到超声振子的共振频率,仿真结果显示:超声振子在第14阶、18 661 Hz时振动可得椭圆运动轨迹,其纵向振幅为3.18μm、横向振幅为0.71μm。最后,通过钛合金研抛方法予以验证,实验结果表明:该装置可使工件表面形成织构,满足设计要求。
A new two-dimensional ultrasonic polishing device for orthopedic implant materials was designed and proposed to combine the ultrasonic processing with biomaterials processing. It can not only study the processing problems of orthopedic implant products with complex surface shapes,but also its three-dimensional space structure is conducive to the attachment of human cells and tissues and improves the ability of bone induction. This device was designed by the combination of analytical method with finite element method. According to the modal analysis and harmonic response analysis of the finite element simulation,the size parameters of the ultrasonic vibrator and the groove size on the transformer were determined and the resonant frequency of the ultrasonic vibrator was obtained. The results of the simulation showed that the elliptical trajectory could be fit by the vibration of the ultrasonic vibrator at the 14 th order 18 661 Hz with a longitudinal amplitude of 3.18 μm and a transverse amplitude of 0.71 μm. Finally,the polishing experiments of titanium alloy were carried out on ultra-precision lathe. The results indicated that the surface with micro-vibration structure could be obtained by the two-dimensional ultrasonic device that meets the requirements of the design.
作者
林洁琼
卢昊
谷岩
辛成磊
袁旭
LIN Jieqiong;LU Hao;GU Yan;XIN Chenglei;YUAN Xu(School of Mechanical Engineering,Changchun University of Technology,Changchun 130012,China)
出处
《电加工与模具》
2019年第5期63-67,共5页
Electromachining & Mould
基金
国家重点研发计划项目(2016YFE0105100)
吉林省省级重点实验室平台建设项目(20140622008JC)
关键词
二维超声研抛
骨科移植材料
变角度
有限元仿真
two-dimension ultrasonic polishing
orthopedic transplant materials
multi-angles
finite element simulation
