激光修正技术是一种采用高能量密度激光对齿轮表面进行微加工的新型加工方法。基于傅里叶能量吸收现象,考虑能量累积、蒸发等效应,建立纳秒脉冲激光微修正的动能量热模型,通过仿真分析了纳秒激光修正齿轮材料20CrMnTi温度场的演变规律,观察了修正表面烧蚀坑的形貌,测量了烧蚀坑的深度和拉曼光谱。实验不仅证实了动能量热模型的正确性与可行性,也为纳秒脉冲激光微修正齿轮的研究提供了理论指导。

Laser correction technology is a new processing method that uses high energy density lasers for conducting micromachining on gear surfaces. This study establishes a dynamic energy thermal model of nanosecond pulse laser microtrimming, and simulates and analyzes the evolution rule of surface temperature filed during the process of 20CrMnTi gear material microtrimming using a nanosecond laser based on the Fourier energy absorption phenomenon and considering various effects such as energy accumulation and evaporation. In addition, the morphologies of the ablation craters of the trimmed surface are experimentally observed, and the ablation crater depth and Raman spectrum are measured. Furthermore, the experiment results verify the accuracy and feasibility of the dynamic energy thermal model and provide theoretical guidance for gear microtrimming using a nanosecond pulse laser.