冠状动脉支架激光精密切割

材料导报, 2008, 22(4): 112-115.

冠状动脉支架激光精密切割

陈卓 ^1, , 王佳玲 ^2, , 李雨田 ^3, , 卜宪章 ^4,

1.中国科学院长春光学精密机械与物理研究所,长春,130033;中国科学院研究生院,北京,100039

2.中国科学院长春光学精密机械与物理研究所,长春,130033;中国科学院研究生院,北京,100039

3.中国科学院长春光学精密机械与物理研究所,长春,130033

4.中国科学院长春光学精密机械与物理研究所,长春,130033

基金项目: 吉林省科技厅资助的产业化研发项目(200629806GJ08)

关键词：冠状动脉支架 , 激光切割 , 不锈钢

Coronary Stent Precise Laser Cutting

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12～15μs,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.

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