Assembly tolerance specification intelligent design method based on Ontology

A technology of assembly tolerance and design method, applied in computer-aided design, calculation, special data processing applications, etc., can solve problems such as difficulty in intelligence, and achieve the effect of ensuring scalability, ensuring portability, and clear hierarchical relationships

Inactive Publication Date: 2019-10-18
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0004] The technical problem to be solved by the present invention is that the design of existing assembly tolerance specification...

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  • Assembly tolerance specification intelligent design method based on Ontology
  • Assembly tolerance specification intelligent design method based on Ontology
  • Assembly tolerance specification intelligent design method based on Ontology

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Embodiment Construction

[0027] The following is a brief description with a two-stage gear reducer as an example, as attached Figure 7 Shown. In order to reduce the complexity, this article only studies the transmission structure between the two drive shafts of the reducer. Both rolling bearings can be regarded as standard parts, regardless of the tolerance types between their internal parts, and only the tolerance specification for the output shaft the design of. It is known that the diameter parameter of the shaft designed according to the shaft parts is D 1 =D 4 =25mm; D 2 =1.6D 1 ;D 3 =1.2D 1 ; The length parameter is L 1 =1.1D 1 ;L 2 =0.3D 1 ;L 3 = 1.3D 1 ;L 4 =0.1D 1 ;L 5 =0.8D 1 ;L 6 =1.5D 1 . The design process of geometric product assembly tolerance specification is attached image 3 As shown, it specifically includes the following steps.

[0028] Step 1. Consult the relevant knowledge in the field of geometric product assembly tolerance specification design, and obtain the domain knowledge o...

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Abstract

The invention belongs to the technical field of assembly tolerance specification design and computer-aided tolerance design (CAT), and particularly relates to an assembly tolerance specification intelligent design method based on Ontology. The method specifically comprises the following steps: (1) constructing a body of an assembly tolerance specification; (2) establishing an SWRL reasoning rule of an assembly tolerance specification; (3) extracting related tolerance information of the assembly tolerance specification; (4) constructing an assembly tolerance specification instantiation ontologymodel; and (5) combining the Jess inference machine with the SWRL rule, inferring the assembly tolerance specification, and outputting a result inference result. An ontology reasoning knowledge framework for the assembly tolerance specification domain knowledge is constructed by utilizing an ontology, and an assembly tolerance specification knowledge base is expanded according to dominant domainknowledge reasoning implicit knowledge. In combination with a semantic network rule language rule base, reasoning design parameters of assembly tolerance specifications for specific design of geometric products and using environmental conditions. The consistency knowledge description framework of the assembly tolerance specification can be provided, so that a computer can automatically select appropriate tolerance principles, tolerance types, size parameters and the like according to shape and size parameters of geometric products, and a quick and effective method is provided for intelligent design of the assembly tolerance specification.

Description

Technical field [0001] The invention relates to the field of assembly tolerance specifications and the technical field of computer-aided tolerance design (CAT), in particular to an intelligent design method of assembly tolerance specifications based on Ontology. Background technique [0002] Tolerance specification design is an important part of tolerance design, which mainly includes the design of tolerance principles, tolerance standards, tolerance types and tolerance values. In the current design of geometric products, tolerance specifications are usually manually determined by designers in the CAD system based on their own experience. This selection method has problems such as low efficiency, low intelligence, and error-proneness. At the same time, it will increase the uncertainty of product design and the complexity of product function tolerance analysis, and ultimately affect the quality of the product. For the same geometric product, different designers may give differen...

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Application Information

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IPC IPC(8): G06F17/50G06N5/02
CPCG06N5/022G06F30/17
Inventor 刘智勇黄美发栾俊凯
Owner GUILIN UNIV OF ELECTRONIC TECH
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