The improvement of mechanical parts inherent reliability has an impact on the reputation and performance of the company. To estimate the inherent reliability of products more conveniently and economically, a hidden quality cost‐production cost (HQC‐PC) reliability prediction model is put forward. To estimate the hidden quality cost (HQC) of products more accurately, a quadratic exponential quality loss function model is established, which is different from Taguchi's quadratic quality loss function (QLF) and the modified QLFs. In the new quality loss model, the growth rate of quality loss on both sides of the target value is considered. Under the condition that the quality characteristic value obeys normal distribution, the general estimation formulas of HQC in the tolerance range is obtained considering sampling error and the numerical model of inherent reliability is established. The effect of different parameters on the inherent reliability of products is discussed with practical case, such as design and production parameters. Then, the appropriate process capability index (PCI) is selected according to different production processes. The relationship between the HQC‐PC reliability prediction model and PCI is derived by a numerical model of inherent reliability. A new analysis method of inherent reliability is proposed.

中文翻译：

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通过改进的质量损失模型对考虑隐性成本的机械零件进行可靠性分析

机械零件固有可靠性的提高会影响公司的声誉和业绩。为了更方便，更经济地估算产品的固有可靠性，提出了一种隐性质量成本—生产成本（HQC‐PC）可靠性预测模型。为了更准确地估计产品的隐藏质量成本（HQC），建立了二次指数质量损失函数模型，该模型不同于Taguchi的二次质量损失函数（QLF）和改进的QLF。在新的质量损失模型中，考虑了目标值两侧的质量损失增长率。在质量特征值服从正态分布的情况下，在考虑采样误差的基础上，得到了HQC在公差范围内的通用估计公式，并建立了固有可靠性的数值模型。结合实际情况，如设计和生产参数，讨论了不同参数对产品固有可靠性的影响。然后，根据不同的生产过程选择适当的过程能力指数（PCI）。HQC-PC可靠性预测模型与PCI之间的关系是通过固有可靠性的数值模型得出的。提出了一种固有可靠性分析的新方法。根据不同的生产工艺选择适当的工艺能力指数（PCI）。HQC-PC可靠性预测模型与PCI之间的关系是通过固有可靠性的数值模型得出的。提出了一种固有可靠性分析的新方法。根据不同的生产工艺选择适当的工艺能力指数（PCI）。HQC-PC可靠性预测模型与PCI之间的关系是通过固有可靠性的数值模型得出的。提出了一种固有可靠性分析的新方法。