基于自由度变动的定向公差计算方法分析  

Calculation Method of Orientation Tolerance Based on Variable Degree of Freedom

作　　者：方东阳[1] 张琳娜[1] 

机构地区：[1]郑州大学机械工程学院,河南郑州450001

出　　处：《机床与液压》2013年第1期24-27,共4页Machine Tool & Hydraulics

基　　金：国家自然科学基金资助项目(50975262)

摘　　要：在分析物体结构特征的基础上,指出了定向几何公差中平行度和垂直度与几何要素自由度的关系;建立了定向误差相关要素的数学模型;分类给出了定向误差位置链中基准不变三环位置链的计算方法,为数字化加工过程中定向公差的设计和工艺计算提供了一种方法。Based on the analysis of object structural features, the relationship between parallelism and perpendicularity of orien- tation tolerance and degrees of freedom of geometry were presented. The mathematical models of orientation tolerance were established. Different type calculation methods of three-integrant position chain with datum fixed for orientation tolerance were proposed, which can provide a way for orientation tolerance design and process calculation of digital processing.

关 键 词：自由度 平行度 垂直度 基准不变 定向公差位置链 

分 类 号：TH243[机械工程—机械制造及自动化]