摘要
针对柔性生产线加工钛合金零件存在的如何进行刀具寿命评价和安全换刀的问题,通过生产现场分布式数控系统实时采集刀具使用时间,形成分组定时截尾数据,基于不完全Beta分布的多层贝叶斯方法进行失效概率估计,并采用两参数威布尔分布作为刀具寿命分布模型,形成刀具可靠度曲线,计算获得柔性生产线加工钛合金零件使用的不同刀具的寿命期望,并以刀具可靠寿命期望为判断指标,开发与零件编程操作、后置处理和机床子程序调用集成使用的安全换刀方法,更换使用新刀具并恢复换刀前的刀具状态继续加工。
For the problem of how to evaluate the tool life and change the tool safely for titanium parts machining in the flexible manufacturing line,the tool usage time is collected by the distributed numerical control system at the production site,and the type-i censoring data are calculated.The estimation of the failure probability is carried out based on the hierarchical Bayesian method of quasi-Beta distribution.Taking the Weibull distribution as the tool life distribution model,the tool life expectancy is calculated for the different end mills of titanium machining in the flexible manufacturing line.Also taking the reliable tool life expectancy as a judgment indicator,the safe tool change method integrated with the part programming,post processing and machine subroutines,is proposed to replace the used tool with a new one to restore the tool status.
作者
姜振喜
孙超
赵中刚
尚江
王伟
沈昕
Jiang Zhenxi;Sun Chao;Zhao Zhonggang;Shang Jiang;Wang Wei;Shen Xin
出处
《工具技术》
北大核心
2021年第1期68-72,共5页
Tool Engineering
关键词
刀具寿命
可靠性
安全换刀
tool life
reliability
safe tool change
