预切槽链刀切削温度场分布特性  

The analysis of the cutting temperature field by pre-cutting machine cutter

作　　者：谭青[1] 易亮[1] 田泽宇 陈力 姚萍屏[3] 夏毅敏[1] 

机构地区：[1]中南大学高性能复杂制造国家重点实验室,湖南长沙410083 [2]中国铁建重工集团有限公司,湖南长沙410100 [3]中南大学粉末冶金研究院,湖南长沙410083

出　　处：《铁道科学与工程学报》2016年第6期1199-1205,共7页Journal of Railway Science and Engineering

基　　金：国家科技支撑计划项目(2013BAF07B06)

摘　　要：为了研究预切槽设备切削过程中链刀的温度场特性,基于传热分析理论,运用了ABAQUS软件建立链刀切削岩土介质的有限元模型,对其温度场进行瞬态仿真,研究不同切削速度以及切削深度下链刀的温度场分布。同时,在链刀切削性能测试试验台开展链刀切削岩土试验,并利用红外线温度测温仪对链刀切削温度进行测量,以验证预切槽链刀的温度分布特性。仿真结果表明:切削岩土时,在刀刃前方和下方温度变化明显,刀尖部分温度最高,整个温度场由刀尖部分向刀内梯度减少;当切深一定时,速度越大,刀尖处的温度越高;当切削速度一定时,切深越大,刀尖处温度越高;切削岩土过程中,对一定速度不同切深下链刀前刀面和后刀面的温度分布进行对比。对于前刀面,温度的增量随着切深的增加而减少;对于后刀面,温度变化基本保持线性增加。To study the cutting tools' thermal characteristics of groove pre-cutting devices in the process of cutting work,a cutting geo material FE model is set up by applying FE method with the basic theory of heat transfer analysis of cutter.A method of transient simulation of the thermal field is presented,and the thermal field distribution of cutting tools is obtained with the different cutting speed and cutting depth.At the same time,chain cutter cutting performance test experiment platform is used to carry out the experiment of chain cutter.Infrared temperature thermometer was used to measure the cutting temperature so as to verify the cutting temperature field.The simulation results show that when cutting rock and soil,in front and bottom of the cutting edge,the temperature goes up apparently,with highest in the front and decreasing from the point to inside in a gradient shape.When the depth of cutting is fixed,the faster the speed,the higher temperature of the point.when the speed is fixed,the deeper the cutting depth,the higher temperature of the point.This paper has compared rake face with flank under the same speed with different cutting depth.It is found that the increment of temperature decreased with the increase of cutting depth for the rake face; while for the flank,temperature increases linearly.

关 键 词：预切槽刀 温度场 有限元 切削 

分 类 号：TP391.9[自动化与计算机技术—计算机应用技术] U25[自动化与计算机技术—计算机科学与技术]