摘要
针对磨削过程中,磨粒间距和工件材料特性对工件表面温度的影响规律进行了有限元仿真研究,结果表明,随着磨削过程的进行,工件表面温度逐渐升高;磨削过程中,相比多磨粒磨削,单颗磨粒磨削的工件表面温度更低,且随时间增加上升速度更小;磨粒间距越大,工件表面温度越低且随磨削过程的进行变化速度越小;工件材料导热率越大,工件表面温度越低,当导热率大于1 W/(m·K)时,温度随导热率增大而下降的趋势不再明显;工件的比热容和密度对磨削温度的影响规律相似,随着比热容、密度增大,工件表面温度降低,且当比热容大于200 J/(kg·℃)、密度大于4000 kg/m3时,工件表面温度随比热容、密度持续增大而降低的趋势不再明显,且温度随时间推移而上升的速度下降。
In this paper,the finite element simulation of the influence of abrasive grain spacing and workpiece material properties on workpiece surface temperature in grinding process is carried out.The results show that the surface temperature of workpiece increases gradually during grinding process;in the grinding process,the workpiece surface temperature in single abrasive grinding is lower than that in multi-abrasive grinding and the increase with time is smaller;the larger the distance between the abrasive grains,the lower the surface temperature and the smaller the change rate with the grinding process;when the thermal conductivity is greater than 1 W/(m·K),the temperature decreases with the increase of thermal conductivity no longer obvious;the effect of specific heat capacity and density of workpiece on grinding temperature is similar.The surface temperature of workpiece decreases with increasing specific heat and density.When the specific heat capacity is greater than 200 J/(kg·℃)and the density is larger than 4000 kg/m3,the decreasing trend of the surface temperature of the workpiece with the increase of specific heat capacity and density is no longer obvious,and the increasing speed of the temperature with time is reduced.
作者
王梦柯
宋飞虎
尹静
吕长飞
WANG Mengke;SONG Feihu;YIN Jing;LÜChangfei(Guizhou Normal University,Guiyang 550014,China)
出处
《航空制造技术》
CSCD
北大核心
2024年第8期99-104,共6页
Aeronautical Manufacturing Technology
关键词
磨粒间距
点热源
材料特性
磨削温度
有限元仿真
Abrasive spacing
Point heat source
Material properties
Grinding temperature
Finite element simulation
