A computer-aided tolerance specification method based on multiple attributes decision-making

Zhao, Qijian; Li, Tukun; Cao, Yanan; Yang, Jiangxin; Jiang, Xiangqian

doi:10.1007/s00170-020-06137-5

Cited by 16 publications

(8 citation statements)

References 34 publications

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“…Computer-aided tolerance design is the key content of the digitalisation of the intelligent manufacturing of products [1,2], in which the realisation of tolerance specification automatic generation (TSAG) is one of the key links. With the efforts of many scholars, the research on achieving the computer-aided design of tolerance specification has also made important progress: Zhang et al [3] constructed a TSAG algorithm based on a multi-colour set method; Zhang et al [4] and Qie et al [5] developed a TSAG method based on a hierarchical tolerance information representation model; and Luo et al [6] and Johannesson et al [7] proposed the adjacency matrix method to represent constraint relations of assemblies.…”

Section: Introductionmentioning

confidence: 99%

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A Tolerance Specification Automatic Design Method for Screening Geometric Tolerance Types

Liu,

Huang,

2024

Applied Sciences

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At present, the automatic generation of tolerance types based on rule-based reasoning has an obvious characteristic: for the same assembly feature, tolerance items are recommended that satisfy all feature characteristics, with a large number of recommendations. For this reason, automatically selecting tolerance types and reducing designer autonomy remains a challenging task, especially for complex mechanical products designed using heterogeneous CAD systems. This article proposes a tolerance specification design method for the automatic selection of assembly tolerance types. Based on the construction of a hierarchical representation model of assembly tolerance information with tolerance-zone degrees of freedom (DOFs), a semantic model of geometric tolerance information with tolerance-zone DOFs and a meta-ontology model of assembly tolerance information representation are constructed. Descriptive logic is used to express the attribute relationships between different classes in the assembly tolerance information meta-ontology model, and screening inference rules are constructed based on the mechanism for selecting assembly tolerance types based on tolerance-zone DOFs. On this basis, a process for selecting assembly geometric tolerance types based on the ontology of tolerance-zone DOFs is formed. Finally, the effectiveness and feasibility of this method were verified through examples.

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Section: Introductionmentioning

confidence: 99%

“…One is to select appropriate tolerance type screening methods. The second is to choose an appropriate product data representation language to meet the requirements of the tolerance information representation in computers and exchange between heterogeneous CAD systems [2,11,12].…”

Section: Introductionmentioning

confidence: 99%

A Tolerance Specification Automatic Design Method for Screening Geometric Tolerance Types

Liu,

Huang,

2024

Applied Sciences

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“…The most characteristic aspect is that it can generate the power code. It is based on the above functional integration that makes the numerical control programming function of CAXA suitable for the operation of complex spatial geometry structure [4][5] . Over the years, many experts and scholars have carried out in-depth studies on CAD and manufacturing, and the state and education management departments have also vigorously promoted it.…”

Section: Introductionmentioning

confidence: 99%

Virtual Simulation Resource Control Platform for Electric Power Training

Hao

Feng

2022

J. Phys.: Conf. Ser.

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Since virtual simulation needs multiple kinds of data as support, the construction of smooth simulation environment requires higher efficiency in data resource management and control. Based on this, a virtual simulation resource management and control platform for electric power training is proposed. On the basis of analyzing the architecture characteristics of virtual simulation engine, the platform structure of operation process simulation and optimization is designed based on three-layer BS mode. The virtual simulation platform is used as the exchange center to establish the data interface. It builds virtual simulation scenarios through mapping, and implements virtual protection tests through GOOSE messages for data management and protection. The control purpose is realized according to the operation process of the equipment and the inherent protection logic. In this paper, a communication module is designed to ensure smooth data transmission between modules. The test results show that the corresponding time of data resource request is mainly concentrated within 20ms, with good efficiency.

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“…The number of recommended assembly tolerance types generated can be further reduced on the basis of this; Start from the basic spatial relationship between geometric elements, the description logic of geometric tolerance, the judgment algorithm and the automatic generation algorithm of the tolerance type were proposed by Qin et al [9]; To realize the automatic generation of the geometric tolerance area in the CAD system, a method based on description logic was proposed by the research group in paper 10 and paper 11; Zhong et al [12,13] used description logic to construct a meta-model of assembly tolerance items, and automatically generated tolerance items based on the ontology. This method reduces the uncertainty of geometric tolerance items through the rules of description logic; Zhao et al [14] proposed a novel method for computer-aided tolerance specification to evaluate static factors and dynamic factors. Those factors are assessed by the rule-based algorithm and axiomatic design algorithm.…”

Section: Introductionmentioning

confidence: 99%

Transfer method of geometric tolerance items based on assembly joints

Yang

et al. 2021

Int J Adv Manuf Technol

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In order to reduce the uncertainty in the selection of geometric tolerance items, a qualitative method for top-down transfer of geometric tolerance items based on assembly joints is proposed. According to the structural characteristics, the assembly joints are divided into meta-assembly joints and composite assembly joints, and the priority rules for assembly joints are proposed. The transfer path of part-level geometric tolerance items is established according to the functional requirements and structural constraints among parts. On this basis, by adding information about the composition and constraint types of assembly joints between parts and the positioning constraint relationship of the general structure surface in the part, the transfer path of part-level geometric tolerance items is extended to the surface-level transfer path. The structural transformation rules for functional requirements based on structural constraints, the tolerance item generation specifications and datum transfer specifications are established. And based on the above specifications, the mapping relationship between functional requirements, structural constraints and geometric tolerance items is defined. The synchronous transmission of geometric tolerance items along with the product design process are realized which provides an effective analysis tool for the top-down design of geometric tolerance items. Finally, the effectiveness of the method is verified by taking the transmission parts and connection parts in the crankshaft-piston mechanism as an example.

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A computer-aided tolerance specification method based on multiple attributes decision-making

Cited by 16 publications

References 34 publications

A Tolerance Specification Automatic Design Method for Screening Geometric Tolerance Types

A Tolerance Specification Automatic Design Method for Screening Geometric Tolerance Types

Virtual Simulation Resource Control Platform for Electric Power Training

Transfer method of geometric tolerance items based on assembly joints

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