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Method for automatically generating geometrical relationship diagram of assembly based on body

A geometric relationship, automatic generation technology, applied in special data processing applications, computer-aided design, design optimization/simulation, etc., can solve problems such as unfavorable post-maintenance and weak generality

Inactive Publication Date: 2021-10-01
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

The existing methods are weak in versatility and not conducive to later maintenance. In order to solve this problem, an ontology-based automatic generation method of assembly geometric relationship diagram is proposed.

Method used

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  • Method for automatically generating geometrical relationship diagram of assembly based on body
  • Method for automatically generating geometrical relationship diagram of assembly based on body
  • Method for automatically generating geometrical relationship diagram of assembly based on body

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Embodiment Construction

[0057] to attach figure 2 Take the output end of the reducer shown as an example to further explain the technical solution of the present invention; 1: reduction box; 2: positioning ring; 3, 7: rolling bearing 6208; 5, 6: end cover; 8: gear; 9: key; the feature surface code p means a plane, c means a cylindrical surface; pj-k means the jth plane on part k; the specific steps are as follows:

[0058] Step 1: Construct the term set of assembly precision information ontology, which can be reused once and infinitely;

[0059] Step 2: Generate the assertion set of assembly precision information ontology, the generated assertion set can be expressed as attached image 3 ;

[0060] Step 3: According to the definition in the technical scheme, use knowledge reasoning to obtain Figure 4 The geometric relationship diagram of the assembly shown;

[0061] The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the present inventio...

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Abstract

The invention discloses a method for automatically generating a geometrical relationship diagram of an assembly based on a body. In order to realize intelligent tolerance distribution and tolerance analysis, firstly, a geometrical relationship diagram of the assembly body is obtained; wherein different tolerance modeling methods are adopted, and a geometric relation graph of the assembly is obtained. At present, an assembly geometrical relationship diagram automatic generation method which is high in universality and easy to maintain in the later period does not exist. In order to solve the problem, the method has the advantages that semantic sharing and rule description in the true sense can be achieved through the ontology, and the geometric relation graph information of the assembly is described through the network ontology language, comprising the following steps: firstly, an assembly precision representation model is constructed; then, a Jena general rule language is used for constructing a rule; and finally, the automatic generation of the geometric relation graph of the assembly is realized through description logic and rules.

Description

technical field [0001] The invention belongs to the technical field of computer-aided tolerance design (CAT), and in particular relates to an ontology-based automatic generation method of an assembly geometric relationship diagram, which can be used for intelligent tolerance analysis based on knowledge reasoning. Background technique [0002] With the development of artificial intelligence, big data, Internet and manufacturing technology, the manufacturing mode of products has undergone profound changes, and intelligent manufacturing based on computer science is an inevitable development trend. As the key to the integration of modern design and manufacturing, tolerance design is an important factor in determining product performance indicators, manufacturing costs and market competitiveness. Tolerance design mainly includes tolerance specification design, tolerance synthesis and tolerance analysis. The essence of tolerance synthesis and tolerance analysis can be understood ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/20
CPCG06F30/20G06F2119/18
Inventor 黄美发郑楠张晗
Owner GUILIN UNIV OF ELECTRONIC TECH
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