Tolerance elements: an alternative approach for cost optimum tolerance transfer
Tolerance elements: an alternative approach for cost optimum tolerance transfer
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DOI：
10.1080/09544820701874039
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发表时间：
2008-04
影响因子：
2.7
通讯作者：
S. Dimitrellou;S. Diplaris;M. Sfantsikopoulos
中科院分区：
文献类型：
--
作者：
S. Dimitrellou;S. Diplaris;M. Sfantsikopoulos
摘要提出了一种将功能公差转换为加工公差的成本优化方法，并将加工公差转换为一个或多个基准参照系。引入公差元的概念，将其作为与加工过程相关的几何实体，具有与精度成本相关的属性。通过适当设计的数据库反馈表，记录特定机加工车间的精度获取能力和每个公差元件的成本。公差元素方法一旦适用于这个机械车间，通过处理数据库反馈表的信息，自动创建以应用程序为中心的成本公差函数。结合公差传递原理和加工轴精度，给出了成本最优公差问题的目标函数。系统数据库只有在机械车间设施和/或专业知识发生变化时才需要专家更新。通过一个应用实例对所提出的方法进行了论证和讨论。
Abstract This paper presents a method for cost optimum conversion of functional tolerances into machining tolerances transferred to one or more datum reference frames. A new concept—that of the Tolerance Element—is introduced as a machining process-related geometric entity with attributes associated with the accuracy cost. The accuracy-getting capabilities and cost per Tolerance Element are recorded for a particular machine shop through an appropriately designed database feedback form. The Tolerance Elements methodology, once adapted for this machine shop through processing information of the database feedback form, automatically creates application-focused cost-tolerance functions. The latter, in conjunction with the tolerance transfer principle and the machining axes accuracies, are used for the formulation of the problem objective function for cost optimum tolerancing. The system database needs expert updating only when changes occur in the machine shop facilities and/or expertise. The proposed method is demonstrated and discussed by means of an application example.