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Research Papers

Realistic Geometry Based Feature Modeling of Complex Part and Its Application in Assembly Quality Analysis

[+] Author and Article Information
Qiu Chan, Peng Xiang, Duan Guifang, Tan Jianrong

State Key Laboratory of CAD & CG,
Zhejiang University,
Hangzhou 310027, China

Liu Zhenyu

State Key Laboratory of CAD & CG,
Zhejiang University,
Hangzhou 310027, China
e-mail: liuzy@zju.edu.cn

1Corresponding author.

Contributed by the Manufacturing Division of ASME for publication in the JOURNAL OF COMPUTING AND INFORMATION SCIENCE IN ENGINEERING. Manuscript received October 6, 2014; final manuscript received April 15, 2015; published online November 2, 2015. Editor: Joshua D. Summers.

J. Comput. Inf. Sci. Eng 15(4), 041007 (Nov 02, 2015) Paper No: JCISE-14-1319; doi: 10.1115/1.4030462 History: Received October 06, 2014; Revised April 15, 2015

The product assembly quality is influenced by the coupling effect of multiscale geometric errors. Acquiring the influence of dimension, tolerance and microtopography on part surface quality is the key factor of improving prediction accuracy of product assembly quality. Since the current technology of part solid modeling is difficult to represent tolerance information and surface topography information in computer aided design (CAD) model uniformly, and the accuracy of product assembly simulation and analysis is reduced, the realistic geometry based feature modeling of complex part and its application in assembly quality analysis are studied in this paper. First of all, the novel concept of realistic geometry is proposed, which integrates several geometric elements such as ideal geometry, variational geometry, and fractal geometry. Then, the hierarchical representation model of realistic geometric feature information of complex part is established, and the concrete method and steps to generate the realistic geometric solid features of complex part are proposed. Finally, the efficiency and feasibility of the proposed theory in this paper are validated by assembly quality analysis of the guide rail and sliding table of the machine tool.

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References

Figures

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Fig. 1

Three hierarchies of part realistic geometry: (a) structure topology hierarchy—ideal geometry; (b) tolerance element hierarchy—variational geometry; and (c) microtopography hierarchy—fractal geometry

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Fig. 2

Information set of realistic geometric feature elements of complex part

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Fig. 3

Flowchart of generation method of realistic geometric solid features of complex part

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Fig. 4

Ideal digital prototype of machine tool and its guide rail and sliding table

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Fig. 5

Ideal geometric model of guide rail and sliding table: (a) ideal geometric model of guide rail and (b) ideal geometric model of sliding table

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Fig. 6

Variational geometric model of guide rail and sliding table: (a) variational geometric model of guide rail and (b) variational geometric model of sliding table

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Fig. 7

Realistic geometric model of guide rail and sliding table: (a) realistic geometric model of guide rail and (b) realistic geometric model of sliding table

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Fig. 8

Assembly design drawing of guide rail and sliding table of machine tool

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Fig. 9

Assembly result of ideal geometric models of guide rail and sliding table: (a) sectional view and (b) equiaxial lateral view

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Fig. 10

Assembly result of variational geometric models of guide rail and sliding: (a) sectional view and (b) equiaxial lateral view

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Fig. 11

Assembly result of realistic geometric models of guide rail and sliding table: (a) sectional view and (b) equiaxial lateral view

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Fig. 12

Distribution nephogram of effective clearance magnitude

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