Dynamic Reliability Sensitivity of Cemented Carbide Cutting Tool

作     者：WANG Xingang ZHANG Yimin LI He L Chunmei 

作者机构：School of Control and Engineering Northeastern University School of Mechanical Engineering and Automation Northeastern University 

出 版 物：《Chinese Journal of Mechanical Engineering》 (中国机械工程学报（英文版）)

年 卷 期：2014年第27卷第1期

页      面：79-85页

核心收录：

学科分类：082304[工学-载运工具运用工程] 08[工学] 080204[工学-车辆工程] 0802[工学-机械工程] 080201[工学-机械制造及其自动化] 0823[工学-交通运输工程] 

基　　金：supported by National Natural Science Foundation of China(Grant Nos.51105068,51305071) Fundamental Research Funds for the Central Universities of China(Grant No.N120203001) Specialized Research Fund for the Doctoral Program of Higher Education(Grant No.20110042120017) 

主　　题：cutting tool dynamic reliability sensitivity critical fatigue stress 

摘      要：Influence of geometric and cutting parameters of cemented carbide cutting tool on reliability of cutting tool has become more and more mature, yet influence of its physical and material parameters on reliability is still blank. In view of this, cutting test and fatigue crack growth test of YT05 cemented carbide cutting tool are conducted to measure such data as the original crack size, growth size, times of impact loading, number and time of cutting tool in failure, and stress distribution of cutting tool is also obtained by simulating cutting process of tools. Mathematical models on dynamic reliability and dynamic reliability sensitivity of cutting tool are derived respectively by taking machining time and times of impact loading into account, thus change rules of dynamic reliability sensitivity to physical and material parameters can be obtained. Theoretical and experimental results show that sensitive degree on each parameter of tools increases gradually with the increase of machining time and times of impact loading, especially for parameters such as fracture toughness, shape parameter, and cutting stress. This proposed model solves such problems as how to determine the most sensitive parameter and influence degree of physical parameters and material parameters to reliability, which is sensitivity, and can provide theoretical foundation for improving reliability of cutting tool system.