采用Nd:YAG激光器切割自动流量平衡阀过流曲线,以切缝宽度、切口表面粗糙度和熔渣量作为衡量指标,研究输出电流、扫描速度、焦点位置、辅助气体种类和压力对自动流量平衡阀过流曲线切割质量的影响。获得了较为理想的切割工艺参数:输出电流为175 A,脉冲宽度为0.3 ms,脉冲频率为70 Hz,扫描速度为40 mm/s,氧气压力为1.0 MPa,离焦量为0。采用该工艺参数,切割出了高质量的过流曲线。 Using the Nd: YAG laser to cut the overcurrent curve of the automatic flow balance valve, taking the kerf width, the incision surface roughness and the amount of slag as the measurement indexes, the author studied the output current, scanning speed, focus position, assisting gas type and pressure on automatic flow balance Valve overcurrent curve cutting quality. The optimal cutting parameters were obtained: output current of 175 A, pulse width of 0.3 ms, pulse frequency of 70 Hz, scanning speed of 40 mm / s, oxygen pressure of 1.0 MPa and defocus amount of 0. Using the process parameters, cut out a high-quality over-current curve.