光纤激光切割紫铜板的工艺研究

Study on Fiber Laser Cutting of Pure Copper Sheet

采用3 000 W光纤激光器对5 mm紫铜板进行切割,分别研究了激光器功率、切割速度、辅助气体压力、离焦量的变化对切割质量(包括切缝宽度、热影响区域宽度、断面粗糙度,挂渣量等)的影响规律,并利用正交实验确定影响切割缝宽和断面粗糙度的因素主次关系,优化出最佳切割参数。实验结果表明,采用功率2 600 W,速度1.4 m/min,氧气压力16 bar,负离焦4 mm的参数切割5 mm紫铜板可以得到切缝窄、断面光滑、无挂渣的良好切割质量。

A 3000 W fiber laser device is adopted to cutting 5 mm copper sheet in order to improve the efficiency and quality. Laser parameters （laser power, cutting speed, gas pressure, beam size） influencing cutting quality （kerf width, roughness, HAZ, slags） were investigated. The optimal laser cutting parameters were obtained by orthogonal array test. Results show that good cutting quality with narrow kerf, smooth cutting edge and less dross can be achieved by using following laser parameters： laser power 2600 W, cutting speed 1.4 m/min, oxygen pressure 16 bar, defocused length -4 mm.