摘要
研究了前刀面具有圆形凹坑阵列微织构的YT15硬质合金刀片对45钢工件进行切削试验时,其微织构参数与刀—屑界面平均摩擦系数的关系。通过单因素试验,获得各织构参数分别和刀—屑界面平均摩擦系数的关系:当凹坑直径小于200μm时,直径越大摩擦系数越小;接触区面积占有率在70%-75%时,摩擦系数较大,接触区面积占有率大于75%,时则可保证刀—屑界面摩擦系数较小;织构凹坑深度为4μm时,可以获得最小平均摩擦系数。验证了织构凹坑直径、接触区面积占有率以及凹坑深度等织构参数对刀—屑摩擦系数的关系,得出了在刀具前刀面加工出合适参数的微织构可有效降低刀—屑界面摩擦系数的结论。
In order to study the relationship between the micro-texture parameters and the average friction coefficient at the tool-chips interface,the YT15 carbide tool with a micro-texture on the rake face is used to perform cutting tests on 45 steel.Through the single-factor test,the relationship between the texture parameters and the average friction coefficient at the tool-chips interface is found as follows.First,when the diameter of the pit is less than 200μm,the friction coefficient decreases as the diameter increases.Second,when area density of contact area is 70%-75%,the friction coefficient is relatively large,and when area density of contact area is greater than 75%,the friction coefficient is smaller.Finally,the minimum average coefficient of friction can be obtained when the depth of the texture pit is 4μm.The relationship between the texture parameters and the friction coefficient of the tool-chips interface is verified.It is concluded that the micro-texture with suitable parameters can effectively reduce the friction coefficient of the tool-chips interface.
作者
杨海东
刘宇强
庆振华
Yang Haidong;Liu Yuqiang;Qing Zhenhua(School of Mechanical Engineering,Hefei University of Technology,Hefei 230000,China)
出处
《工具技术》
2019年第2期27-30,共4页
Tool Engineering
关键词
刀具前刀面
表面织构
织构参数
刀—屑摩擦系数
tool rake face
surface texture
texture parameter
friction coefficient of tool-chips interface
