自动化车床刀具检测优化模型研究∗

摘要

从自动化车床连续加工某种零件的故障检测问题出发，探究了检测方法与刀具更新对于生产附加成本的关系。建立了有更新点的检查维护和预防性刀具更新的检测优化模型；给出了自动化车床刀具检测优化模型研究检查成本、不合格零件损失期望和包含故障维护费用与刀具定期更换费用的总维护费用的期望的计算方法；得到了以一定检测间隔、预防性刀具更换周期为自变量的平均生产附加成本函数，取得了较优定期检测间隔和定期刀具更换间隔；运用蒙特卡洛随机仿真的方法，进行了仿真模拟，检验了模型结果的优越性。%Based on the practical problem in malfunction detection in automatic lathe, we discuss the influ-ence of detection method and update period on the additional cost. We build up the optimized model based on the checkpoint detection and preventive update. Then we give out the method to calculate the expectation of malfunction loss, update cost and total maintenance cost. Through this method we get the additional cost function with variable update period and detection period. At last we get the optimized solution of the func-tion. Finally we use Monte Carlo simulation to test the model. The result shows that our model works well in this problem.