论文部分内容阅读
采用光栅光谱仪对脉冲光纤激光修锐青铜金刚石砂轮过程中产生的等离子体空间分辨发射光谱进行了测量.研究了500—600nm波段范围内的等离子体空间发射光谱强度随激光平均功率和脉冲重复频率的变化情况.结果表明:等离子体辐射光谱强度在其径向膨胀方向上距离砂轮表面约2.4mm处达到最大值.在局部热力学平衡假设条件下,根据等离子体中六条铜原子谱线的相对强度,利用Boltzmann图法,计算得到在不同激光功率和重复频率条件下的等离子体电子温度沿砂轮径向方向的分布规律.实验结果表明:在激光修锐青铜金刚石砂轮过程中,距离砂轮表面约3mm处等离子体电子温度出现峰值,其温度最高可达4380K,且等离子体电子温度随着激光参数和空间位置的改变呈现出不同的演变规律.
Grating spectrometer was used to measure the spatial-resolved plasma emission spectra of pulsed fiber laser-sharpened bronze diamond grinding wheel.The spatial distribution of the plasma emission spectrum with the average laser power and pulse repetition frequency The results show that the intensity of the plasma reaches its maximum at about 2.4 mm from the surface of the wheel in the radial expansion direction.Under the assumption of local thermodynamic equilibrium, according to the relative intensity of the six copper atoms in the plasma, The Boltzmann diagram was used to calculate the distribution of plasma electron temperature along the radial direction of the wheel under different laser power and repetition frequency.The experimental results show that in the process of laser sharpening the bronze diamond wheel, The plasma electron temperature peak, the temperature up to 4380K, and the plasma electron temperature with the laser parameters and spatial location of the changes showed different evolution.