摘要
通过设计正交试验,研究了IC10高温合金在缓进磨削过程中磨削工艺参数及表面粗糙度对疲劳寿命的影响规律,建立了工艺参数对磨削表面粗糙度及疲劳寿命影响的映射关系模型,并以表面粗糙度、疲劳寿命、材料去除率为优化目标进行了IC10高温合金缓进磨削工艺参数多目标优化。研究表明,IC10高温合金磨削工件疲劳寿命随砂轮线速度的增加而增加,随工件进给速度和磨削深度的增加而减小,且疲劳寿命随砂轮线速度的变化最为敏感,工件进给速度次之,对磨削深度的变化敏感度最低。当表面粗糙度R_(a)由0.44μm增大到0.94μm时,磨削工件疲劳寿命由9.69×10^(6)降低到1.25×10^(6),减小了约87.1%,这表明磨削表面粗糙度对磨削疲劳寿命的影响非常显著。在综合考虑磨削表面粗糙度、疲劳寿命、材料去除率的情况下,通过多目标优化得到IC10高温合金缓进磨削工艺参数为:砂轮线速度v_(w)=20m/s,工件进给速度v_(w)=117mm/min,磨削深度a_(p)=0.48mm。
Orthogonal experiments were designed to research the effects of grinding parameters and surface roughness on the fatigue life of IC10 superalloy during creep feed grinding.Based on experimental results,empirical models of grinding parameters and surface roughness,fatigue life were established.Then multi-objective optimization of grinding parameters was carried out for smaller surface roughness,longer fatigue life and higher machining efficiency.The results show that the fatigue life increases with increasing grinding wheel speed while it decreases with increasing workpiece feed speed or grinding depth.The wheel speed has the highest influence on the fatigue life,followed by workpiece feed speed and grinding depth.As surface roughness R_(a) increased from 0.44μm to 0.94μm,the fatigue life decreased about 87.1%from 9.69×10^(6) to 1.25×10^(6),indicating that the grinding surface roughness has a significant influence on fatigue life.By optimization of grinding parameters,a group of suitable grinding parameters could be given as:wheel speed v_(w)=20m/s,the workpiece feed speed v_(w)=117mm/min,and the grinding depth a_(p)=0.48mm,with taking,full account of the fatigue life,machining efficiency and surface roughness.
作者
杨忠学
张帅奇
王赛
王帅
张长春
熊一峰
蒋睿嵩
张强
YANG Zhongxue;ZHANG Shuaiqi;WANG Sai;WANG Shuai;ZHANG Changchun;XIONG Yifeng;JIANG Ruisong;ZHANG Qiang(National Key Laboratory of Advanced High Temperature Structural Materials,Beijing Institute of Aeronautical Materials,Beijing 100095,China;Key Laboratory of High Performance Manufacturing for Aero Engine,Ministry of Industry and Information Technology,School of Mechanical Engineering,Northwestern Polytechnical University,Xi’an 710072,China;Engineering Research Center of Advanced Manufacturing Technology for Aero Engine,Ministry of Education,School of Mechanical Engineering,Northwestern Polytechnical University,Xi’an 710072,China;Sichuan University,Chengdu 610065,China)
出处
《航空制造技术》
CSCD
北大核心
2022年第8期98-106,共9页
Aeronautical Manufacturing Technology
基金
中国航发自主创新专项基金(CXPT–2020–014)。
