冠状动脉支架激光精密切割  

Coronary Stent Precise Laser Cutting

作　　者：陈卓[1,2] 王佳玲[1,2] 李雨田[1] 卜宪章[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,长春130033 [2]中国科学院研究生院,北京100039

出　　处：《材料导报》2008年第4期112-115,共4页Materials Reports

基　　金：吉林省科技厅资助的产业化研发项目(No.200629806GJ08)

摘　　要：系统地研究了影响冠脉支架激光精细雕刻切口质量的因素,包括激光器切割工艺参数:波长1064nm,光斑直径2～3mm,脉宽12～15!s,脉冲频率1000～1200Hz,平均功率15W,脉冲能量10～15mJ;切割速度:30cm/min;辅助气体O2压力0.2～0.4MPa;喷嘴与工件表面距离L=4.09mm。建立了激光切割过程温度场的数学模型。结果表明冠脉支架筋宽理论值与实际切割值存在±0.01mm误差,由阿贝-赫梅特判据判定激光切割系统存在周期性系统误差。确定了316L不锈钢冠脉支架Nd-YAG激光器精细加工工艺参数,实现了冠状动脉支架精度为0.01mm的激光精密切割。The factors affecting laser cutting notch are analyzed systematically including laser cutting processing parameters wavelength 1064nm, spot diameter 2 -3mm, pulse width 12 - 15 μs, pulse frequency 1000- 1200Hz, average power 10-15mJ ;supplementary gas O2 pressure 0.2 -0.4MPa ;range between muzzle and workpiece L=1-2mm. A mathematic model of laser cutting temperature field is established. There exist an error of ±0.01mm between the muscular theoretical value and the actual value. The periodic systematic error is predicted based on Abbe-Halmiton criterion. The 316L stainless steel precise Nd-YAG laser cutting technological parameters are determined. The coronary stent laser cutting wiht 0.01mm ratio of precision is implemented.

关 键 词：冠状动脉支架 激光切割 不锈钢 

分 类 号：TH122[机械工程—机械设计及理论]