激光微切割钴铬管的实验研究

Experimental Research on Fiber Laser Micro-cutting Co-Cr Tube

金属细管的微细切割,目前使用最多的是YAG激光器。但随着光纤激光器的发展,光纤激光器也逐渐使用到金属细管的微细切割上。首先使用光纤激光器对钴铬合金细管进行切割,通过改变气体、气压、脉宽以及切割速度观察影响切割质量的因素。得出应用氩气和氮气作为辅助气体时,效果要好于压缩空气;存在一个最佳的气压;随着脉冲宽度的降低,切割质量随之变好;切割速度与切口宽度保持一种非线性反比关系;然后应用三倍频Nd∶YAG激光器切割钴铬合金细管,比较两种激光器的切割质量和切割效果,分析两者的优劣,得出在进行微细切割时,三倍频Nd∶YAG激光器比光纤激光器有更大的优势。在今后的研究中应充分发挥三倍频Nd∶YAG激光器的优势,同时要发掘光纤激光器的特点。

The fiber laser is used to cut Co-Cr alloy cannula by changing of the aid-air, air pressure, pulse width and cutting speech in order to view the actions of the cut quality. Then the frequency tripled Nd： YAG laser is applied to cut the same material and the two cutting results were compared. It is found that using Ar or N2 as aid-air is better than using compress air, there is a best air pressure exit, the more reduce of the pulse width the better, and there is a nonlinear inverse ratio between the cutting rate and the width of cutting. And it is also found that frequency tripled Nd： YAG laser is better than fiber laser when use for micro-cutting.