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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 3 000 W fiber laser was used to cut the 5 mm copper plate. The influences of laser power, cutting speed, auxiliary gas pressure and defocus amount on the cutting quality (including kerf width, heat affected zone width, cross-sectional roughness, The amount of dross, etc.). The orthogonal experiment was used to determine the primary and secondary factors that affect the width of cut and the roughness of section, and the optimal cutting parameters were optimized. The experimental results show that cutting a 5 mm copper plate with a power of 2 600 W, a speed of 1.4 m / min, an oxygen pressure of 16 bar, and a negative defocus of 4 mm can result in a good cutting quality with narrow kerf, smooth section and no dross.