1.1 尺寸链公差叠加定义（Definition of TSU) 尺寸链公差叠加计算—决定在一个零件上或一个装配上，两个形体之间理论上的最大或最小距离。A tolerance stack-up is a calculation which determines the theoretical maximum or minimum distance between two features on a part or in an assembly. 公差分配—决定在一个零件上或一个装配上允许的制造公差，来获得指定功能。Tolerance allocation—the process of determining the allowable manufacturing tolerance on a piece part of assembly dimension to achieve the given function. 公差分析—一个数学方法，用来评估几个尺寸或零件的公差偏差，来确保实现形状、装配和功能要求。Tolerance analysis—A mathematical technique to assess the tolerance variation across several dimensions or parts. To confirm that form, fit and function have been achieved. 1.2 尺寸叠加解决的典型问题：(Typical issues including）
两个面有干涉吗？（Will two surfaces interfere?)
孔轴能装配吗？（Will the pin fit the hole?)
如果减少孔的间隙，零件依然可以装配吗？（If reduce the size of the clearance holes, will the parts still assemble well?)
如何控制公差。（How to control tolerance) 1.3 尺寸链公差叠加的作用(Function of TSU)
优化零件和装配件的公差（ Optimize the tolerance of parts and assemblies in a new design.)
获得满足功能要求的最好的成本效率设计（To achieve the most cost effective design which will meet all functional requirements)
确定零件公差、满足最终组装件的装配（Determine the part tolerances required to satisfy a final assembly condition.)
知道了装配公差如何推断零件公差（Determine the allowable part tolerance s if assembly tolerance is known.)
解决现有零件和装配件的失效问题（Troubleshoot malfunctioning existing parts of assemblies.)
寻找零件公差调整方案的可行性（Explore design alternatives using different or modified parts) 1.4 尺寸链公差叠加的类型(Categories of TSU)
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发表于 2011-4-22 20:17:32
发表于 2011-5-1 18:41:00
