摘要
为研究窄深槽不同磨削区域的温度分布情况,通过将砂轮与工件的接触区分为顶刃区和侧刃区,对窄深槽底面和侧面分别进行温度研究。在窄深槽磨削中,顶刃区热流服从圆弧形形状函数分布,侧刃区服从浅磨的磨削特点,且窄深槽底面和槽侧面在磨削过程中受到多个磨削热源的耦合作用,据此建立了窄深槽底面和槽侧面的磨削温度理论模型。采用K型热电偶测量了窄深槽底面和侧面的磨削温度,通过试验对磨削温度理论模型的有效性进行验证。研究结果表明:窄深槽底面和侧面受到多个磨削热源耦合作用,直接作用于加工面的磨削热源对加工面的温度影响最显著;窄深槽试验测量温度与理论计算值表现出良好的一致性。理论推导与实验分析结果可为窄深槽加工工艺参数的优化提供依据。
In order to study the temperature distribution of different grinding areas of the narrow-deep-groove,the contact area between the grinding wheel and the workpiece was divided into the top edge section and the side blade section,and the temperature of the bottom and side surfaces of the narrow-deep-groove was studied separately.During narrow-deep-groove grinding,the heat flux in the top edge section was of arc shape function distribution,the side blade section followed the grinding characteristics of shallow grinding,and the bottom and side surfaces of the narrow-deep-groove were coupled by multiple grinding heat sources during the grinding process.A theoretical model of the grinding temperature of the bottom and side of the narrow-deep-groove was established.K-type thermocouples were used to measure the grinding temperature of the bottom and side of the narrow-deep-groove.The theoretical model for grinding temperature calculation were verified by experiments.The results show that both the bottom and side of the narrow-deep-groove are coupled by multiple grinding heat sources,and the grinding heat source that directly acts on the workpiece surface has the most significant effect on the temperature of the workpiece surface.The experimental temperature of the narrow-deep-groove is good agreement with the theoretical results.It is concluded that the theoretical analysis and experimental results can provide a basis for the optimization of processing parameters of narrow-deep-groove.
作者
曹鹏飞
梁国星
吕明
郝新辉
CAO Peng-fei;LIANG Guo-xing;L Ming;HAO Xin-hui(College of Mechanical and Vehicle Engineering,Key Laboratory of Precision Manufacturing,Taiyuan University of Technology,Taiyuan 030024,China)
出处
《科学技术与工程》
北大核心
2020年第29期11909-11914,共6页
Science Technology and Engineering
基金
国家自然科学基金(51575375)。
关键词
窄深槽
耦合作用
热流分布
磨削温度
narrow-deep-groove
coupling effect
heat flux distribution
grinding temperature
