功能边界在几何公差设计中的应用  

Functional boundary and its application in geometric tolerance design

作　　者：徐旭松 吴德辉 XU Xu-song;WU De-hui(College of Mechanical Engineering,Jiangsu University of Technology,Changzhou 213001;BOSCH Power Tools（China）Co.,Ltd.,Hangzhou 310052)

机构地区：[1]江苏理工学院机械工程学院,江苏常州213001 [2]博世电动工具(中国)有限公司,浙江杭州310052

出　　处：《机械设计》2018年第8期93-98,共6页Journal of Machine Design

基　　金：国家自然科学基金资助项目(51475219)

摘　　要：为了更好地运用现行公差标准中的边界理论进行机械精度和检具设计,介绍了ASME Y14.5和ISO/GPS公差标准中的边界概念及各自定义出发点和特点,深入分析两个标准中边界概念的不同之处,以及使用最大实体要求后边界的变化情况,探讨了在两个不同标准下使用最大实体要求时隐藏在背后的设计意图,并以电圆锯输出轴系统的几何公差设计为例,分析了边界理论的应用。正确应用功能边界进行几何公差设计,对合理保证零件的功能和可装配性、提高经济性有重要意义。In order to make better use of boundary theory for the design of mechanical precision and function gauge in accordance with the current tolerance standard, the concepts, starting points and characteristics of boundary theory in ASME Y14.5 and ISO/GPS are introduced. An in-depth analysis is conducted on the difference of boundary concepts based on the two different standards and the boundary change by means of the maximum material requirement. The design intention beyond the maximum material requirement based on the two different standards is illustrated. The geometric-tolerance design of the electric saw output-shaft system is taken as an example to illustrate the application of boundary theory. It is of great significance to make proper use of functional boundary for the design of geometric tolerance, which is cost-effective. This will ensure the normal function of the parts and provide ease to the assembly.

关 键 词：公差边界 最大实体要求 产品几何技术规范 几何尺寸与公差 

分 类 号：TG801[金属学及工艺—公差测量技术]