基于复耦合模型的面齿轮飞秒激光加工参数影响研究
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国家自然科学基金项目(No.51975192);湖南省自然科学基金项目(No.2021JJ30214;No.2021JJ50042);“机电汽车”湖北省优势特色学科群项目(No.XKQ2021044;No.XKQ2021050)资助。


Research on influence of femtosecond laser processingparameters of face gear based on complex coupling model
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    摘要:

    分析了飞秒激光精微加工面齿轮材料18Cr2Ni4WA的机理,在光子与电子,电子与晶格之间温度传递的双温模型的基础上建立了耦合动态热力学参数的复耦合模型,通过模型仿真分析,得出了电子与晶格的温度变化过程,预测了去除高于蒸发温度的材料烧蚀形貌。对面齿轮材料进行飞秒激光扫描加工实验,得出随着能量密度的增大,凹坑半径和深度都会有一定程度的增大,当能量密度为198J/cm2时,烧蚀形貌较好,当能量密度继续增大达到218J/cm2时,凹坑内部开始产生少量的熔融物堆积;随着脉宽的增大,形貌变化不大,但产生的熔融物逐渐减少,凹坑趋于平整;随着扫描速度的增大,沟槽的深度逐渐减小,宽度逐渐增大。采用三维超景深仪观测烧蚀形貌,实验结果与仿真结果基本一致,为飞秒激光精微加工面齿轮提供了依据。

    Abstract:

    In this paper,the mechanism of femtosecond laser micro-machining surface gear material 18Cr2Ni4WA is analyzed.Based on the dual-temperature model of temperature transfer between photons and electrons,electrons and lattices,the coupling dynamic thermodynamic parameters of photons and electrons,electrons and lattices are established.Through the model simulation analysis,the temperature change process of the electron and the crystal lattice is obtained,and the ablation morphology of materials removed above evaporation temperature is predicted.The femtosecond laser scanning processing experiment on the face gear material shows that as the energy density increases,the pit radius and depth will increase to a certain extent.When the energy density is 1.98 J/cm2,the ablation morphology is better;when the energy density continues to increase to 2.18 J/cm2,a small amount of melt accumulation begins to occur inside the pit,resulting in a certain decrease in the depth of the pit;with the increase of the pulse width,the morphology changes little,but the melt gradually decreases,and the pits tend to be flat;as the scanning speed increases,the depth of the groove gradually decreases and the width gradually increases.The ablation morphology is observed by a three-dimensional ultra-depth-of-field instrument,and the experimental results are basically consistent with the simulation results,which provides a basis for improving the quality of femtosecond laser micro-machined gears.

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明兴祖,赖名涛,明瑞,周贤,樊滨瑞,贾松权.基于复耦合模型的面齿轮飞秒激光加工参数影响研究[J].激光与红外,2022,52(6):838~848
MING Xing-zu, LAI Ming-tao, MING Rui, ZHOU Xian, FAN Bin-rui, JIA Song-quan. Research on influence of femtosecond laser processingparameters of face gear based on complex coupling model[J]. LASER & INFRARED,2022,52(6):838~848

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  • 在线发布日期: 2022-06-24