基于优度评价法的数控磨床可靠性分析研究

Study on Reliability Analysis of CNC Grinding Machine Based on Priority Degree Evaluation Method

数控磨床作为高精密加工零件不可或缺的制造装备之一,其可靠性将直接影响产品的质量.现对某生产厂家的MKS系列数控磨床的故障数据进行分析.通过使用可拓工程理论中的优度评价法对数控磨床的可靠性进行分析,将数控磨床划分为11个子系统,然后分别对其各子系统确定相应的衡量指标,进而确定权系数建立关联函数,计算出子系统对整机可靠性的影响度及影响因子,并得到了头架系统中故障模式对子系统以及对整机的影响因子.通过对影响因子的计算,得到出现故障的原因并提出整改意见,提出的整改措施已被厂家应用于实际生产当中.

As one of the indispensable manufacturing equipment for high precision machining parts,the reliability of the CNC grinding machine will directly affect the quality of the product.Analysis the fault data of MKS series CNC grinding machine of a manufacturer.Through the use of priority degree evaluation method of extension engineering to analysis the reliability of CNC grinding machine,the CNC grinding machine is divided into 11 subsystems,and determine the measure index of each subsystem,and then ensure weight coefficient to establish correlative function,calculate the influence degree and influence factors of the subsystem on the reliability of the whole machine.and obtain the influence factors of the fault mode on the headstock system and the whole machine.Through the calculation of the influence factors,obtain the reasons of fault and put forward correction proposal,The proposed rectification measures have been applied to the actual production by the manufacturer.