刀库故障重要度分析与可靠性改进设计  

The importance analysis of tool magazine fault and its reliability improved design

作　　者：申桂香[1] 李怀洋[1,2] 张英芝[1] 李全普[3] 王晓峰[1] 丁烨[1] 

机构地区：[1]吉林大学机械科学与工程学院,长春130022 [2]徐工集团徐州重型机械有限公司,江苏徐州221004 [3]大连机床集团有限责任公司,辽宁大连116620

出　　处：《重庆大学学报（自然科学版）》2013年第6期70-75,共6页Journal of Chongqing University

基　　金：“高档数控机床与基础制造装备”科技重大项目资助(2010ZX04014-011);吉林大学科学前沿与交叉学科创新项目资助(200903165)

摘　　要：刀库系统的可靠性水平是衡量卧式加工中心先进性的重要指标。为有效提升刀库系统的可靠性水平,引进重要度和结构优化相结合的新方法。以某型号卧式加工中心刀库系统为研究对象,根据现场试验采集的35条故障数据信息,建立了刀库系统的故障树,通过故障树分析计算出了基本事件的重要度,并根据重要度值进行重要度排序。针对故障重要度大的基本事件,结合具体的换刀过程和故障原理,提出了结构优化可靠性设计,该设优化计方案经刀库系统设计人员验证具有可行性。The reliability level of tool magazine is an important indicator to show how advanced a horizontal machining center is.To more effectively promote the reliability level of tool magazine,a new method combining importance and structure optimization is introduced.Taking tool magazine of a horizontal machinging as object,the fault tree of a tool magazine is established based on 35 failure data obtained from a horizontal machining center.Important levels of elementary events are calculated by fault tree analysis,and the order of importance is determined based on importance values.An improved design of structural reliability for elementary events with great importance is made according to failure principles and tool changing process.The feasibility of the improved design is verified by the designer of the tool magazine.

关 键 词：刀库 故障树分析 重要度分析 自动换刀 链式刀库 

分 类 号：TG659[金属学及工艺—金属切削加工及机床]