飞秒激光烧蚀齿面表层构态分析及其控制研究  

Research on femtosecond laser ablation of tooth surfaceconfiguration analysis and its control study

作　　者：徐海军 明兴祖[1] 李湾 颜敏 吴陶 李楚莹 XU Hai-jun;MING Xing-zu;LI Wan;YAN Min;WU Tao;LI Chu-ying(School of Mechanical Engineering,Hunan University of Technology,Zhuzhou 412007,China;Department of Mechanical and Electrical Engineering,Hunan Automotive Engineering Vocational College,Zhuzhou 412000,China)

机构地区：[1]湖南工业大学机械工程学院,湖南株洲412007 [2]湖南汽车工程职业学院机电工程学院,湖南株洲412000

出　　处：《激光与红外》2024年第1期63-71,共9页Laser & Infrared

基　　金：国家自然科学基金项目(No.51975192);湖南省教育厅科学研究优秀青年项目(No.22B0994);湖南省自然科学基金(No.2023JJ50207,No.2021JJ30214,No.2021JJ50042)资助。

摘　　要：为了分析飞秒激光烧蚀面齿轮齿面表层构成及其形态影响,本文针对面齿轮材料18Cr2Ni4WA,通过建立双温传热模型,模型采用向后有限差分法进行飞秒激光烧蚀数值模拟,研究飞秒激光烧蚀齿面的加工过程,分析能量密度对重铸层和热影响层的影响规律。结果显示:能量密度由1.73 J/cm^(2)增加至4.33 J/cm^(2),重铸层厚度从0.68μm增加到1.02μm,热影响层厚度从0.96μm增加到1.35μm。针对重铸层的控制,本文实施了对面齿轮齿面的二次加工,实验结果表明:采用能量密度1.73 J/cm^(2)对齿面进行二次加工,加工后的齿面几乎没有重铸物残留,齿面平均粗糙度由0.365μm降到了0.185μm,有效地改善了面齿轮的加工质量,为提高飞秒激光精微烧蚀面齿轮精度提供了有益参考。In this paper,a double-temperature heat transfer model for the gear material 18Cr2Ni4WA is established in order to analyze the composition and morphological influence of femtosecond laser ablation surface of gear tooth surface.The numerical simulation of femtosecond laser ablation surface is carried out using backward finite difference method to study the machining process of femtosecond laser ablation surface,and the influence law of energy density on recast layer and heat-affected layer is analyzed.The results show that the energy density increases from 1.73 J/cm^(2) to 4.33 J/cm^(2),the thickness of recasting layer increases from 0.68μm to 1.02μm,and the thickness of heat affected layer increases from 0.96μm to 1.35μm.Aiming at the control of recast layer,a secondary machining of opposite gear tooth surface is implemented,and the experimental results show that when the energy density of 1.73J/cm^(2) is used for secondary machining of the tooth surface,there is almost no recast residue;and the average roughness of the tooth surface decreases from 0.365μm to 0.185μm,which effectively improves the machining quality of the tooth surface gear,and provides a useful reference for improving the precision of femtosecond laser ablation surface gear.

关 键 词：飞秒激光烧蚀 表层构态 二次加工 能量密度 面齿轮 

分 类 号：TN249[电子电信—物理电子学] TG665[金属学及工艺—金属切削加工及机床]