加工中心数控转台可靠性强化试验方法研究.pdf

22 82011 4 1 1 2 1 张根保 许 智 何文辉 涂 林 1.重庆大学,重庆,400030 2. 中国计量学院, 杭州, 310018 :通过分析加工中心数控转 的故障数据,找出影响其可靠性的主要故障模式, 发现数控转 的主要故障是液压系统的泄漏和罩壳密封不严使切削液渗漏进转 内部而导致的零部件损坏以此为 基础设计出可靠性强化试验方案, 采用多种应力共同组成综合应力试验剖面,使得在较短时间内激发出 数控转 的故障, 同时通过改进措施来提高数控转 的可靠性试验结果表明,综合应力剖面选取正 确,能够达到可靠性强化试验的目的 :; ; ; :T H311 : 1004 132X(2011)08 0948 04 Research on Reliability Enhancement Testing Method of NC Rotary Table 1 1 2 1 Zhang Genbao Xu Zhi He Wenhui Tu Lin 1.Chongqing niversity,Chongqing,400030 2.China Jiliang niversity,Hangzhou,310018 Abstract: The failure data of NC rotary table were analyzed statistically and it is found that the leak of hydraulic system and components damage caused by cutting fluid infiltrated through shield are the main failure models affected reliability of NC rotary table seriously. Reliability enhancement testing plan was proposed based on the analysis of the failure mechanism. Several kinds of environmental stresses were adopted in testing profile in order to stimulate the failure of NC rotary table.The measures to enhance the reliability were suggested. The testing results demonstrate the testing profile is reasonable and the testing plan can achieve the purpose of reliability of enhancement testing. Key words:NC rotary table;enhancement testing;testing profile; reliability [4] 0 引言 , Nelson , z , ,