Key research on computer aided tolerancing

Cao, Yan; Mathieu, Luc; Jiang, Xiangqian

doi:10.1631/jzus.a1500093

Cited by 10 publications

(4 citation statements)

References 71 publications

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“…Obviously, it is difficult to understand the semantics of coaxiality with double material requirements without professional training and it has become an urgent problems for CAT to realize its semantics to be interpreted automatically by computer. The contents of CAT relate to the aspects of tolerance specification and standardization, product design, manufacture, inspection and measurement of tolerance, product life cycle management, and functional tolerancing 14 . It is a very important problem for CAT to express tolerance semantic information that can be read and understood automatically by computer through tolerance model and to exchange information between different heterogeneous CAx (CAD, CAE, CAM, etc.)…”

Section: Related Workmentioning

confidence: 99%

“…The contents of CAT relate to the aspects of tolerance specification and standardization, product design, manufacture, inspection and measurement of tolerance, product life cycle management, and functional tolerancing. 13 It is a very important problem for CAT to express tolerance semantic information that can be read and understood automatically by computer through tolerance model and to exchange information between different heterogeneous CAx (CAD, CAE, CAM, etc.). 14 Tolerance models such as tolerance maps (T-Maps)model, 15,16 small displacement torsor (SDT) model, 17,18 Jacobian-Torsor model, 19 offsetting model, 20,21 kinematic model, 22,23 degree of freedom (DOF) model, 24,25 vector equation model, 26,27 belong to the interpretation model, and the computer cannot read and understand their meaning directly.…”

Section: Related Workmentioning

confidence: 99%

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Enhanced semantic representation of coaxiality with double material requirements

Peng

Huang

Zhong

et al. 2020

Concurrency and Computation

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Summary In order to improve the assemblability and reduce the cost of the parts, the material requirements can be applied to the toleranced feature and the datum feature of the coaxiality at the same time in the practical application. How to realize the information exchange between different heterogeneous systems and how to read and explain the semantics of this complex tolerance specification automatically is one of the urgent problems to be solved in intelligent digital manufacturing. Ontology described in OWL2 DL and SWRL language has strict mathematical basis of description logic, and the knowledge represented by it has clear semantics and can be read and understood directly by computer. In addition, because of its consistency checking, knowledge reasoning, and flexible query ability, it becomes the most potential knowledge representation technology in the future. On the other hand, the semantic interpretation of tolerance specification by the new generation GPS theory based on skin model has the advantages of clear semantics, no ambiguity, and consistency at different stages of the product life cycle. In this article, the enhanced semantic representation ontology for this kind of coaxiality tolerance specification is constructed based on the advantages of the new GPS theory and ontology technology and the effectiveness of the method is verified and analyzed through a case.

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Section: Related Workmentioning

confidence: 99%

Section: Related Workmentioning

confidence: 99%

Enhanced semantic representation of coaxiality with double material requirements

Peng

Huang

Zhong

et al. 2020

Concurrency and Computation

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“…According to RST-DT, PDTB, Chinese complex sentence [13] and sentence-group theory [14], We adopt a presentation format of connective dependency tree, in which leaves are EDUs and intermediate nodes are connectives, as annotation scheme for Chinese discourse tree bank (CDTB).For detail you can reference Li et al [6] Example (1) There are three sentences in example (1), "|" indicates first layer,"||" indicates second layer,"|||" third layer and so on. Arabic numerals indicate EDUs.…”

Section: Chinese Discourse Treebankmentioning

confidence: 99%

Chinese Discourse Segmentation Based on Punctuation Marks

Li¹,

Feng²,

Feng³

2015

IJSIP

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“…Hong and Chang 7 had a comprehensive review of tolerance research and Cao et al. 8 reviewed key research on computer aided tolerancing.…”

Section: Introductionmentioning

confidence: 99%

Generalized definition and application of tolerance

Hao

Youli

Wang

2019

Proceedings of the Institution of Mechanical Engineers, Part C:

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Tolerance with upper deviation less than lower deviation is defined as virtual tolerance; the dimension between two extreme values required with tolerance (virtual tolerance) is expressed by a set. The changed characteristics of the set range when the tolerance value is continuously reduced from positive to negative are explored. The nature of virtual tolerance is that the absolute value of virtual tolerance is the error compensation amount, and the dimension between two extreme values is the error compensation range. On the basis of the concept of positive and negative number, the theory of dimensional homogeneity, the existing conditions of the general formula of the dimensional chain, the accuracy of the calculation results of tolerance, and so on, the concept of virtual tolerance and its relationship of unity of opposites with tolerance are proposed. Based on the concept of virtual tolerance, analysis and calculation processes of various assembly dimensional chains are unified, and general formulation of calculating the range of false waste is established, and the method of determining the range of false waste by using probabilistic method in machining process is deduced.

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Key research on computer aided tolerancing

Abstract: International audienceComputer aided tolerancing (CAT) covers a wide range of subjects including specification and standardization, tolerancing in design/manufacturing process/product life management, verification and metrology, and functional tolerancing

Cited by 10 publications

References 71 publications

Enhanced semantic representation of coaxiality with double material requirements

Enhanced semantic representation of coaxiality with double material requirements

Chinese Discourse Segmentation Based on Punctuation Marks

Generalized definition and application of tolerance

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