Producibility Models for the Class of Geometric Position Tolerance Controls

该补助金为概率模型的开发提供资金，以将位置公差约束和过程能力数据映射为产量的定量测量。 本研究所解决的位置公差控制类代表了世界范围内工业生产工作中使用的主要规格约束类，包括机械，电子（印刷电路板和相关组件）和其他产品。 一个通用的三维制造误差模型将被用来作为两大类的位置公差控制和它们的变体的products模型的制定输入。 将开发这些模型的精确或近似数值解，并进行灵敏度分析调查，以阐明和量化重要的设计和制造误差变量对位置公差控制类产品的影响。 这些模型的技术实现将通过实验评估其预测能力来证明，如果成功的话，这项研究的结果将导致模型和解决方案的程序，将首次提供位置公差控制方案变量对生产率的影响的定量测量。 该研究项目还将使竞争的位置公差控制方案的生产率的基础上进行合理的比较评估。 设计工程师可以访问基本的制造过程能力数据，将能够在设计阶段评估上游可行位置公差控制方案的生产能力。 制造工程师在实现给定的位置公差控制方案时，将能够评估满足成品率要求所需的最低精度和精度。 这些模型和解决方案在生产环境中的技术实施的示范将提供一个合理的论据，以促进采用生产模型作为一个有价值的补充文件，目前的尺寸和公差标准。

This grant provides funding for the development of probabilistic models to perform the mapping of position tolerance constraints and process capability data into a quantitative measure of yield. The class of position tolerance controls addressed by this research represents the dominant class of specification constraints used worldwide in industrial production work spanning mechanical, electronic (printed circuit boards and related assemblies) and other products. A generic 3-dimensional manufacturing error model will be used as input to the formulation of producibility models for the two broad classes of position tolerance control and their variants. Exact or approximate numerical solutions to these models will be developed and an investigation of sensitivity analysis will be performed that will elucidate and quantify the effect of important design and manufacturing error variables on producibility of the class of position tolerance control. A technological implementation of these models will be demonstrated by way of an experimental evaluation of their predictive power.If successful, the results of this research will lead to models and solution procedures that will provide, for the first time, a quantitative measure of the effect of position tolerance control scheme variables on producibility. The research project will also enable a rational comparative evaluation of competing position tolerance control schemes on the basis of producibility. Design engineers with access to basic manufacturing process capability data will be able to assess the producibility of feasible position tolerance control schemes upstream, at the design stage. Manufacturing engineers confronted with the realization of a given position tolerance control scheme will be able to evaluate the minimum accuracy and precision required to meet yield requirements. Demonstration of the technological implementation of these models and solutions in a production setting will provide a rational argument to promote adoption of producibility models as a valuable complementary document to present dimensioning and tolerancing standards.