织物表面激光打标工艺参数的数值模拟及选取方法  

Numerical simulation for selecting laser parameters in marking process with different fabrics

作　　者：连力平 杨鹏程[1,2] 余子健 龙阳昭 肖渊 LIAN Liping;YANG Pengcheng;YU Zijian;LONG Yangzhao;XIAO Yuan(School of Mechanical and Electrical Engineering,Xi′an Polytechnic University,Xi′an,Shaanxi 710048,China;Xi′an Key Laboratory of Modern Intelligent Textile Equipment,Xi′an,Shaanxi 710600,China)

机构地区：[1]西安工程大学机电工程学院,陕西西安710048 [2]西安市现代智能纺织装备重点实验室,陕西西安710600

出　　处：《纺织学报》2023年第6期121-128,共8页Journal of Textile Research

基　　金：陕西省科技厅自然科学基础研究计划-面上项目(2022JM-219);西安市现代智能纺织装备重点实验室建设项目(2019220614SYS021CG043)。

摘　　要：织物打标中,激光器的速度及能量密度等参数直接影响着打标效果。为深入研究激光打标织物表面的烧蚀机制及其工艺优化参数的选取,通过建立激光与不同织物基底之间的相变传热模型,对打标过程中温度场和材料去除量的变化进行了数值模拟,利用热扩散理论分析了打标工艺参数对打标结果的影响规律。结果表明:在瞬态变化过程中,所需的激光能量密度与平均升温速率及打标深度呈线性关系;所需的激光移动速度与平均升温速率正相关,与打标的宽度、深度负相关。基于打标深度,提出了激光参数的选取方法,进行了不同织物基底的激光打标实验,并结合光表面作用理论,分析了相关误差,验证了本文提出的打标宽度随激光能量密度和移动速度变化规律的正确性。Objective Laser marking,which has the advantages of being durable,waterproof and non-contact,is an effective method for recording commodity data and decorating textile products.In the marking process,the laser speed and energy density directly affect the marking effect.The laser energy density and movement speed often show different effects on the fabric substrates owing to the optical and thermal properties.This research aim to optimize the laser marking parameters for the best marking result.Method To solve this issue,three fabric substrates of cotton,polyester and polypropylene are selected in this research,the ablation process of laser marking fabric surface and the selection principles of process parameters were investigated based on both simulation modeling and experimental analysis.First,the phase change heat transfer models between the laser and different fabric substrates were established.Subsequently,changes in temperature field and material removal during marking were numerically simulated.Finally,the effects of marking process parameters on the marking results were analyzed by thermal diffusion theory in simulation experiments and actual experiments.Results The simulation results show that the required laser energy density of the three fabric substrates had a linear relationship with the average heating rate and marking depth,and the required moving speed was positively related to the average heating rate.Moreover,the average heating rate of fabric substrates decreased with the increase in material thermal conductivity.The marking width and depth were negatively related to the laser moving speed,and negatively related to the laser energy density during transient changes.After the simulation,actual experiments were conducted for three fabric substrates.The actual experimental results of the three fabric substrates verified that the marking width was positively related to the energy density,and negatively related to the movement speed,which was in agreement with the simulation results.The calculation re

关 键 词：激光打标 激光参数 非稳态 纺织材料 数值模拟 打标工艺 

分 类 号：TS194.5[轻工技术与工程—纺织化学与染整工程] TN244[轻工技术与工程—纺织科学与工程]