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Product assembly representation method based on engineering connection relationship

A product and relationship technology, applied in the field of computer representation of product assembly relationship, can solve the problem of not expressing the geometric information of engineering connection relationship at the same time, and achieve the effect of avoiding combination explosion and complete assembly information.

Inactive Publication Date: 2011-07-20
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0048] In order to overcome the deficiency that the existing product assembly computer representation method does not simultaneously express the higher-level engineering connection relationship and the lower-level geometric information, the present invention proposes a new product assembly representation method

Method used

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  • Product assembly representation method based on engineering connection relationship
  • Product assembly representation method based on engineering connection relationship
  • Product assembly representation method based on engineering connection relationship

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Embodiment Construction

[0070] by figure 2 The shown flashlight assembly design is used as the object of description, and the flow chart and implementation plan of the computer representation method based on the engineering connection relationship disclosed by the present invention are as follows, that is, repeat the following two steps for each separable element until all The elements of are decomposed into inseparable elements:

[0071] Step 1: Decompose the assembly operation of the selected components according to the engineering connection relationship. For the sake of simplicity, here only the disassembly process of selecting the whole flashlight, that is, the assembly, for the assembly operation is explained, and the disassembly of other components is similar. From figure 2 It can be seen that the flashlight is composed of four parts: the head (1) component, the barrel (2) component, the battery (3) component, and the bottom (4) component. They are all component components and cannot be fu...

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Abstract

The invention discloses a product assembly representation method based on engineering connection relationship, i.e. a product assembly modeling method which is applied to the development of a computer aided assembly design system, especially applied to the development of to a CAD (Computer Aided Design) system. In the method, the engineering connection relationship serves as a principal line represented by assembly knowledge and assembly models; a product and parts are represented by a generalized ring method according to the engineering connection relationship to form an engineering connection drawing, namely a product assembly model, thus, the connection composition relationship of the product is represented on an engineering connection level; and meanwhile, geometry information or other non-geometry information can be represented on a lower level because information is added on a related knot, thereby expressing production assembly information more integrally. The method can be suitable for the requirements of assembly design, such as product assembly structure design, assembly sequence planning, assembly system design and the like, so that the assembly design can be solved more effectively, and especially, the phenomenon of combinatorial explosion can be effectively avoided during assembly sequence planning.

Description

technical field [0001] The present invention relates to a computer representation method of product assembly relationship, in particular, it can convert the engineering connection relationship of products into a graph, which is used to record the composition structure, connection relationship and other information of products, so as to facilitate the use of computer systems for product design. It is different from the commonly used methods of expressing product assembly relations based on part connection relations and connection knowledge. Background technique [0002] With the accelerated development of economic globalization and global informatization, the production mode of products is undergoing tremendous changes, gradually changing from a few varieties and large batches to a multi-variety and small batch production mode, and the product development time cannot adapt to the product life cycle. Keep shortening the asking questions. In the product development process, pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 尹文生
Owner HUAZHONG UNIV OF SCI & TECH
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