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Estimate of Cutting Tool Lifespan through Cox Proportional Hazards Model

机译:通过Cox比例危害模型估算刀具寿命

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Abstract: An important proportion of the cost of machined mechanical elements emanates from the cost of cutting tools inserts. A large part of these costs is due to improper maintenance decisions. In this paper, we demonstrate the use of a gamma process tool wear simulation for providing tool lifetimes at several cutting speeds. We show the use of a survival model (Cox Proportional Hazards model) on turning cutting inserts, using the cutting speed as covariate. Contrary to other approaches, the Proportional Hazards model is not used to produce the parameters of a reliability model, but the Mean Up Time is rather computed through the integration of the raw survival model reliability baseline. Additional simulated data is used to validate the model. The importance of a proper distribution of the PH model fitting data is highlighted by the experimental results.
机译:摘要:切削机械元件成本的很大一部分来自切削刀具刀片的成本。这些费用的很大一部分是由于维护决策不当所致。在本文中,我们演示了使用伽马工艺刀具磨损仿真来提供几种切削速度下的刀具寿命。我们展示了在切削刀片时以切削速度为协变量的生存模型(Cox比例危害模型)的使用。与其他方法相反,比例危害模型不用于生成可靠性模型的参数,而是通过原始生存模型可靠性基线的积分来计算平均运行时间。其他模拟数据用于验证模型。实验结果突出了正确分配PH模型拟合数据的重要性。

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