摘要
涡轮叶片榫齿缓进磨削过程热力载荷效应对成型表面质量具有重要影响。基于实验研究磨削参数对DD5单晶高温合金磨削力和温度的影响规律,分析缓进磨削力和温度形成机理,构建DD5缓进磨削力、温度与磨削工艺参数的映射模型并进行验证。结果表明:DD5缓进磨削深度对磨削力和磨削温度的影响最为显著,砂轮线速度次之,工件进给速度对其影响最小;随着砂轮线速度的增大,磨削力降低、磨削温度升高;随着工件进给速度和磨削深度的增大,磨削力和磨削温度均呈升高趋势;满足材料去除速率的前提下提高工件进给速度并降低磨削深度,可以避免DD5磨削表面出现较大的磨削热力耦合影响层。
The effect of thermal load in the creep feed grinding have important effect on the surface quality for machining the tenon teeth of turbine blade.In this paper,the effects of grinding parameters on grinding forces and temperature in grinding DD5 single crystal alloy are investigated by experiments.The influences and formation mechanism of DD5 creep-feed grinding forces and temperatures are analyzed,and a mapping model between thermodynamic effect and grinding parameters is established and verified.The experimental results show that the grinding depth has the greatest influence on the DD5 creep-feed grinding force and temperature,following by the grinding wheel speed,and the feed velocity of work-piece has less influence on the grinding forces and temperature.With the increase of the grinding wheel speed,the grinding force is decreasing,and the grinding temperature has an increasing trend.With the increase of feed velocity and grinding depth,both the grinding force and temperature are of increasing trends.Increasing the feed velocity and reducing the grinding depth on the premise of satisfying the material removal rate can avoid the larger grinding thermodynamic coupling layer on the DD5 grinding surface.
作者
张帅奇
杨忠学
张长春
张强
赵子晗
黄朝晖
ZHANG Shuaiqi;YANG Zhongxue;ZHANG Changchun;ZHANG Qiang;ZHAO Zihan;HUANG Zhaohui(The Key Laboratory of Advanced High Temperature Structural Materials,Beijing Institute of Aeronautical Materials,Beijing 100095,China;Institute of High Temperature Materials,Beijing Institute of Aeronautical Materials,Beijing 100095,China)
出处
《航空工程进展》
CSCD
2021年第4期80-89,共10页
Advances in Aeronautical Science and Engineering
关键词
DD5
单晶高温合金
缓进磨削
磨削力
磨削温度
DD5
single crystal super-alloy
creep-feed grinding
grinding forces
grinding temperatures
