摘要
根据数控机床功能原理划分机床子系统,针对某机床厂数控机床的具体故障数据提出了如何正确筛选故障数据的方法;筛选出符合计数要求的故障数据后,采用Minitab软件对整机的故障间隔时间进行分布模型优选,并根据数控机床某些子系统存在故障数据样本小的情况,采用极大似然估计法和偏差修正得到整机和子系统的可靠性函数,最后采用D检验法求得整机和各子系统的可靠性函数都符合要求。基于该流程下的数控机床可靠性函数的计算更具实际应用性。
According to working principle of CNC machine tools,the subsystems were divided. And a method of screening failure data was established based on the failure information in the CNC machine tools factory. After screening,the preferred distribution model was got based on failure statistics by Minitab software. And for the failure data of small sample,maximum likelihood estimation method and parameter bias correction method are used to estimate the functions of reliability for the whole system as well as the subsystems,and they were accorded with D test. Based on this process,the reliability functions of CNC machine tools was considerably more practical application.
出处
《组合机床与自动化加工技术》
北大核心
2016年第3期97-100,共4页
Modular Machine Tool & Automatic Manufacturing Technique
关键词
数控机床
故障信息
故障数据筛选
可靠性函数
CNC machine tools
failure information
screening of failure data
reliability function