小模数齿轮断续滚齿热力耦合建模与试验研究  

Modelling and Experimental Study on Thermal-mechanical Coupling of Fine-pitch Gear Intermittent Hobbing

作　　者：夏宁伟 刘辉华 杨国祥[3] 王俊[3] 周长江[1] XIA Ningwei;LIU Huihua;YANG Guoxiang;WANG Jun;ZHOU Changjiang(State Key Laboratory of Advanced Design and Manufacturing Technology for Vehicle,Hunan University,Changsha 410082,China;Hunan Desheng Intelligent Technology Co.,Ltd.,Loudi 417126,China;Changde Tobacco Machinery Co.,Ltd.,Changde 415000,China)

机构地区：[1]湖南大学整车先进设计制造技术全国重点实验室,湖南长沙410082 [2]湖南德晟智能科技有限公司,湖南娄底417126 [3]常德烟草机械有限责任公司,湖南常德415000

出　　处：《湖南大学学报(自然科学版)》2025年第2期88-97,共10页Journal of Hunan University:Natural Sciences

基　　金：2022年“芙蓉计划”湖南省企业科技创新创业团队项目(湖南德晟智能驱动与传动创新团队);国家自然科学基金资助项目(52075153)。

摘　　要：小模数齿轮加工过程中,滚齿切削时易于产生显著的热变形,进而影响其尺寸精度和服役性能.基于展成法加工原理和齿坯材料切除机制,提出小模数齿轮断续滚齿切削热力耦合计算模型.设计多级滚切速度下的钢制小模数齿轮试件试验,测算试件表面缺陷、粗糙度与公法线偏差.对比公法线偏差测量值和塑性应变仿真值,验证上述计算模型的正确性.研究齿轮模数、切削速度和传热条件对切削应力、表面温度及热变形的影响规律.结果表明:切削应力水平与模数负相关,与切削速度正相关;齿面缺陷密集度、表面温度和热变形均与切削速度正相关.适当降低滚刀转速、减小滚刀直径及强化切削区对流换热,可减小滚齿热变形,提高齿形精度和表面质量.In the fine-pitch gear manufacturing process,significant thermal deformation is prone to occur during the gear hobbing,which in turn affects its dimensional accuracy and operational performance.Based on the principle of spreading processing and the mechanism of metal destruction,a thermal-mechanical coupling model is proposed for the intermittent hobbing of fine-pitch gears.Steel fine-pitch gear specimens are prepared using various hobbing speeds.By comparing the measured profile deviations with the simulated plastic strain values,the accuracy of the proposed model is verified.The influence of modulus,cutting speed,and heat transfer condition on cutting stress,temperature,and thermal deformation is studied.The results show that the cutting stress is negatively The 2022“Furong Plan”Hunan Enterprise Sci-Tech Innovation and Entrepreneurship Team Project Hunan Desheng Intelligent Drive and ational Natural Science Foundation of China(52075153)correlated with the gear modulus and positively correlated with the cutting speed.The tooth surface defect density,temperature,and thermal deformation are positively correlated with the cutting speed.To reduce heat deformation and improve tooth accuracy and surface quality,the rotational speed of the hob and its diameter should be decreased.Additionally,convective heat transfer in the cutting zone should be enhanced.

关 键 词：小模数齿轮 齿轮加工 热力耦合 传热 热变形 

分 类 号：TG501[金属学及工艺—金属切削加工及机床]