摘要
以国内某MGKF1800型高精高效立式复合磨床为分析对象,借助故障树分析法、模拟工况仿真分析及数值模型估计方法,寻找磨床最易发生故障的薄弱零部件。结果表明:故障产生的根本原因主要是丝杠导轨的散热效率低。针对此问题,可通过优化结构设计、增大空气散热及合理配置外部冷却装置的方法降低磨床关键部件热变形。通过有限元分析及可靠性评价等方法,细化磨床易产生热变形的具体位置及变形量,为产品实际量产阶段的关键部件热设计及结构优化设计提供参考。
Taking a domestic MGKF1800-type high-precision and high-efficiency vertical composite grinding machine as the analysis object,the fault tree analysis method,simulation analysis of simulated operating conditions and numerical model simulation method were introduced to find the weak parts which were most prone to cause faults with the grinding machine.The results show that the root cause of the fault is the low heat dissipation efficiency of the wire guide rail.To address this issue,the thermal deformation of key components of the grinder can be reduced by optimizing structural design,increasing air heat dissipation and rationally allocating external cooling device.By using finite element analysis and reliability evaluation,the specific position and amount of thermal deformation of the grinding machine can be refined,which provides reference for the thermal design and structural optimization design of key components in the actual mass production stage.
作者
陈泽众
林志伟
傅建中
CHEN Zezhong;LIN Zhiwei;FU Jianzhong(College of Mechanical Engineering,Zhejiang University,Hangzhou Zhejiang 310000,China)
出处
《机床与液压》
北大核心
2022年第20期141-147,共7页
Machine Tool & Hydraulics
基金
浙江省科技计划项目(2021C01096)
浙江省基础公益研究计划项目(LGG19E050027)
浙江省高校实验室工作研究项目(ZD202001)。
关键词
数控磨床
故障树分析法
有限元分析
可靠性评价
CNC grinder
Fault tree analysis method
Finite element analysis
Reliability evaluation
