氟金云母陶瓷车削中脆性材料切削热传导理论模型  

Theoretical Model of Heat Conduction of Brittle Material in the Process of Turning Fluorophlogopite Ceramics

作　　者：马廉洁[1,2] 陈景强 邓航 周云光 蔡重延 孙智超 MA Lian-jie;CHEN Jing-qiang;DENG Hang;ZHOU Yun-guang;CAI Zhong-yan;SUN Zhi-chao(Mechanical Engineering and Automation College,Northeastern University,Shenyang 110819,China;Control Engineering College,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China)

机构地区：[1]东北大学机械工程与自动化学院,沈阳110819 [2]东北大学秦皇岛分校控制工程学院,秦皇岛066004

出　　处：《科学技术与工程》2020年第11期4345-4350,共6页Science Technology and Engineering

基　　金：河北省自然科学基金(E2018501078);教育部中央高校基本科研业务费项目(N172303008)。

摘　　要：通过分析可加工陶瓷切削温度变化规律,提出脆性材料在车削中存在着两个不同的温升阶段,反映了切削系统存在的热传导及热积累效应。根据热传导基本理论,建立以刀具-工件接触点为移动热源的脆性材料切削热传导理论模型,结合微元法量化脆性材料车削中的热量分配,采用能接近实际车削中温度场变化形式的镜像热源原理,求解脆性材料切削温度的二次跃迁值。用PCD(聚晶金刚石)刀具车削氟金云母陶瓷,进行切削验证实验,结果表明,脆性材料切削热传导理论模型能够较准确地求解切削温度的二次跃迁值,并反映陶瓷等脆性切削温度场的变化趋势。By analyzing the variation in temperature of machinable ceramics cutting, two different temperature rising stages during the turning of brittle materials were discovered, reflecting heat conduction and heat accumulation effects of the cutting system. Based on the theory of heat conduction, a theoretical model of brittle material cutting heat conduction with the contact point of tool and workpiece as the moving heat source was established. The heat distribution in brittle material turning was measured by the micro element method. The principle of mirror heat source that was close to the change of the temperature field in actual turning was applied to solve the secondary transition value of the cutting temperature of brittle materials. Using a PCD cutting tool, a cutting verification experiment was carried out by turning fluorophlogopite ceramics. Results show that the theoretical model of heat conduction of brittle material cutting could solve the secondary transition values of the cutting temperature accurately, and reflect the variation trend of the cutting temperature field of brittle materials such as ceramics.

关 键 词：切削温度 车削热 传导 氟金云母 

分 类 号：TH161.4[机械工程—机械制造及自动化]