Tolerance polyhedron modeling and analysis considering surface shape deviation

被引：0
|
作者：
Xu X. [1 ]
Wang H. [1 ]
Sun Z. [1 ]
Lu H. [2 ]
机构：
[1] College of Mechanical Engineering, Jiangsu University of Technology, Changzhou
[2] Wuxi Metrology Institute, Wuxi
来源：
Jisuanji Jicheng Zhizao Xitong/Computer Integrated Manufacturing Systems, CIMS | 2023年 / 29卷 / 11期
关键词：
convex hull; milling cutter seat; polyhedron; shape deviation; tolerance analysis; tolerance modeling;
D O I：
10.13196/j.cims.2022.0345
中图分类号：
学科分类号：
摘要：
Tolerance modeling and analysis using ideal surface model or without considering shape deviation often leads to interference risk in part assembly or assembly accuracy cannot be guaranteed. To solve the problem, the geometric deviations of part features were expressed in vectors based on the definitions of half space and polyhedron. The tolerance polyhedron inequalities of part layer were constructed according to the dimensional tolerance constraints. The tolerance polyhedron inequalities of assembly layer were constructed based on ideal surface model. The tolerance polyhedron inequalities based on non-ideal surface model were constructed by adjusting the parameters of assembly contact surfaces using assembly optimization functions, and the surface shape deviations were incorporated into the tolerance mode. The milling cutter seat assembly was taken as an example to establish the tolerance polyhedron convex hulls of each deviation transfer path of the assembly, which solved by Minkowski sum. The deviation value of the target ring was obtained by intersection operation. The tolerance values were adjusted manually and recalculated until the target ring deviation met the initial precision design requirement. © 2023 CIMS. All rights reserved.
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页码：3681 / 3691
页数：10
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