Product modeling method based on interactive feature pair

A product modeling and product technology, applied in special data processing applications, instruments, electrical and digital data processing, etc., can solve problems such as dependence, difficulty in consistency, and difficulty in generating general methods to ensure consistency and good products. Assembly Modeling Effects

Active Publication Date: 2013-09-04
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But both methods have their inherent deficiencies: the bottom-up way to describe the relationship between parts (assembly constraints or connection features) is difficult to achieve the consistency of the designer's analysis, and the top-down way to describe the relationship between parts (layout interface in the structure) depends heavily on the specific product model to be established, and it is difficult to generate a general method

Method used

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  • Product modeling method based on interactive feature pair
  • Product modeling method based on interactive feature pair
  • Product modeling method based on interactive feature pair

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0073] This implementation example is to build an assembly model platform-top cone 9 of platform 1 and top cone 2 based on the interactive feature pair.

[0074] The specific steps of building part model platform 1 and top cone 2 and embedding interactive feature pairs in them are as follows:

[0075] Step 1.1: Determine the part model set P={platform 1, top cone 2}, the number of parts n=2;

[0076] Step 1.2: Select part model p 1 = Platform 1, use CATIA modeling tool to build part model p of platform 1 1 ;

[0077] Step 1.3: Determine the part model p 1 = platform 1 and part p 2 = the interactive interface of the top cone 2, if there is no interactive interface, then enter step 1.5, otherwise enter step 1.4;

[0078] Step 1.4: Determine the part model p in the interactive interface 1 =interaction feature set F contained in platform 1={platform feature point 3, platform feature surface 4, platform feature line 5}, where the number of interaction features m=3;

[0079] ...

Embodiment 2

[0097] This implementation example is to establish the assembly model plate-cone 24 of the plate 19 and the flat-headed cone 20 based on the interaction feature pair.

[0098] The specific steps for establishing the part model flat plate 19 and flat head cone 20 and embedding interactive feature pairs therein are as follows:

[0099] Step 1.1: Determine the set of part models to be established P={flat plate 19, flat cone 20}, the number of parts n=2;

[0100] Step 1.2: Select part model p 1 = flat plate 19, adopt CATIA modeling tool to establish the part model p of flat plate 19 1 ;

[0101] Step 1.3: Determine the part model p 1 = plate 19 and part p 2 =The interactive interface of the flat cone 20, if there is no interactive interface, then enter step 1.5, otherwise enter step 1.4;

[0102] Step 1.4: Determine the part model p in the interactive interface 1 =interaction feature set F={plate feature surface 21} contained in the plate 19, wherein the number of interactiv...

Embodiment 3

[0116] This implementation example is to establish an assembly model plate-nail 37 of the plate with holes 31 and the nail 32 based on the interaction feature pair.

[0117] The specific steps for building the part model with holes 31 and nails 32 and embedding interactive features therein are as follows:

[0118] Step 1.1: Determine the set of part models to be established P={perforated plate 31, nail 32}, the number of parts n=2;

[0119] Step 1.2: Select part model p 1 =perforated plate 31, adopt CATIA modeling tool to set up the part model p of banded plate 31 1 ;

[0120] Step 1.3: Determine the part model p 1 = perforated plate 31 and part p 2 = nail 32 interactive interface, if there is no interactive interface, then enter step 1.5, otherwise enter step 1.4;

[0121] Step 1.4: Determine the part model p in the interactive interface 1=interaction feature set F={with plate hole feature line 33, with plate hole feature surface 34} contained in the plate with holes 31...

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Abstract

The invention provides a product modeling method based on an interactive feature pair. The method includes the steps of firstly, conducting product part modeling, and enabling the interactive feature pair to be embedded in a part model on the basis of interactive interfaces among product parts, then, achieving assembly modeling through feature elements of the fully specified interactive feature pair on the basis of the part model where the interactive feature pair is embedded. The product modeling method based on the interactive feature pair has the advantages that the interactive feature pair is divided into six types of highly abstracted basic classifications, in the assembly modeling method from top to bottom, ports are set up through the interactive feature pair so that enough abstraction and generality can be ensured, consistency of constraints analysis for designers can be ensured when the interactive feature pair is embedded in the part model in comparison with a traditional assembly modeling method from bottom to top, and the interactive feature pair can be used for geometric reasoning in a downstream technology design process. Through the product modeling method based on the interactive feature pair, the advantages of the assembly modeling technology from top to bottom and the advantages of the assembly modeling technology from bottom to top can be combined, and therefore product assembly modeling can be better conducted.

Description

technical field [0001] The invention belongs to the field of computer-aided design, in particular to a product modeling method based on interactive feature pairs. Background technique [0002] Assembly modeling is a key link in the process of modern product development. The quality of modeling and the level of efficiency directly affect the final quality of products and the length of delivery time. Assembly modeling is generally realized by establishing the constraint relationship between parts on the basis of part modeling. At present, this modeling method is the mainstream method of assembly modeling, but this method is different from the designer's top-down thinking method. It is a bottom-up modeling method. When the number is large, the number of constraint relationships that need to be established in the modeling process is huge. In addition, because the constraints are realized by combining engineering semantics with geometric parameters, the constraints defined by d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 张杰徐志佳李原余剑峰孙元亮
Owner NORTHWESTERN POLYTECHNICAL UNIV
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