【摘要】 利用飞秒激光器具有超短脉冲和超高峰值功率的特性,对非金属可降解血管支架的切割加工进行了研究,实验证明利用飞秒激光切割非金属支架可以达到无热损伤的精密加工的目的。通过正交实验得到加工非金属血管支架各参数之间的关系,求出最佳加工参数:激光脉冲频率10kHz,脉冲宽度412fs,激光功率1.6 W,辅助Ar气压0.8MPa,切割速度1.2mm/s,达到对非金属材料聚乳酸切线精细平直、切边光滑,表面无碳化、无残渣残留的加工效果,加工出了相应的非金属支架样品。更多还原

【Abstract】 With the characteristics of femtosecond laser ultrashort pulse and high peak power,cutting processing of nonmetal vascular shent is studied.Experiments show that using femtosecond laser can achieve precision machining without thermal damage.The relationship between parameters of machining non metallic stent is obtained through orthogonal experiment,and the optimum processing parameters are obtained:laser pulse frequency is 10 kHz,pulse width is 412 fs,laser power is 1.6 W,the auxiliary Ar pressure is 0.8 MPa,cutting speed is 1.2 mm/s.The processing of nonmetal material polylactic acid has the effect of tangent fine flat,cutting edge smooth,no surface carbonization residue.High quality non-metallic stent sample is obtained.更多还原