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Modularized three-dimensional modeling method based on STEP-NC standard

A STEP-NC, 3D modeling technology, applied in the field of 3D modeling, can solve problems such as inability to visualize parametric modeling process, poor versatility, and cumbersome feature library expansion

Active Publication Date: 2021-09-14
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This feature recognition method has shortcomings such as recognition error, poor versatility, and time-consuming recognition process; another method is based on the secondary development of CAD software. Although this method avoids the shortcomings of the first method, it is based on Feature modeling or definition for feature library establishment
Therefore, there are the following disadvantages: (1) The expansion of the feature library is cumbersome; (2) The parametric modeling process cannot be visualized, and the designer can only imagine the process modification when modifying the CAD model; (3) The development adopts the dialog mode , once the features of the workpiece are complex and multi-feature coupling occurs, subsequent feature design and modification cannot be performed

Method used

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  • Modularized three-dimensional modeling method based on STEP-NC standard
  • Modularized three-dimensional modeling method based on STEP-NC standard
  • Modularized three-dimensional modeling method based on STEP-NC standard

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Such as Figure 1-5 As shown, a modular 3D modeling method based on the STEP-NC standard, which is implemented based on the C# programming language development and the Grasshopper entity module in Rhino (3D modeling software), in Rhino (3D modeling software) Create the STEP-NC machining feature unit module of the simplest machining feature unit stipulated in the ISO14649-10 standard (STEP-NC standard), so as to realize the modular, parametric, and visualized 3D modeling of complex workpieces, including the following steps:

[0042] Step S100: Perform preprocessing on complex workpieces.

[0043] Specifically include the following steps:

[0044] Step S110: According to the ISO14649-10 standard (STEP-NC standard), the complex workpieces are sorted into processing feature units.

[0045]Processing feature unit sorting refers to discretizing complex workpieces into the simplest combination of processing feature units in the ISO14649-10 standard (STEP-NC standard).

[00...

Embodiment 2

[0081] see Figure 6 , Figure 7 , Figure 8 As shown, the workpiece in Example 2 is more complex than that in Example 1, and there are more STEP-NC machining feature unit modules and unit combination modules dragged and selected in the parameterization module, and the connection is more complicated. Figure 8 More directly shows that in the operation interface of the 3D software, you can adjust the Figure 8 The parameters in the parameterized module on the left can be changed in real time Figure 8 The 3D stereomodel on the right.

[0082] The modeling method of the present invention can realize multi-shape machining feature unit modeling, because the method of the present invention strictly follows the ISO14649-10 standard, that is, the STEP-NC standard for modeling, and solves the problem of traditional database modeling methods. limitation. The modeling method of the present invention can also realize the visualization of the complex workpiece design process, and can...

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Abstract

The invention relates to a modular three-dimensional modeling method based on the STEP-NC standard. The modular three-dimensional modeling method specifically comprises the following steps: pretreating a complex workpiece; according to the complex workpiece pretreatment result obtained in the step S100, selecting a needed STEP-NC machining feature unit module; according to the pre-treatment result of the step S100 and the STEP-NC machining feature unit module selected in the step S200, completing the parametric modeling of the complex workpiece. According to the method, the STEP-NC machining feature unit based on the ISO14649-10 standard can be established, visualization of the parametric modeling process of the workpiece can be achieved, feature modeling of the complex workpiece is achieved in a module pulling mode, and the method has the advantages of being efficient, accurate, low in cost and the like.

Description

technical field [0001] The invention relates to the field of three-dimensional modeling, in particular to a modular three-dimensional modeling method based on the STEP-NC standard. Background technique [0002] With the continuous development of manufacturing technology, the current manufacturing mode gradually cannot meet the processing needs of workpieces. At present, CNC machine tools are still programmed in "G and M code" languages ​​for most workpiece processing, and CNC programs are usually generated by CAD / CAM systems. This manufacturing mode has disadvantages such as poor program portability and incomplete workpiece processing information. Analogous to program programming, this manufacturing mode can be regarded as a process-oriented manufacturing mode. In order to make up for the above shortcomings, the International Organization for Standardization has formulated the STEP standard to replace the "G and M code" language programming, which is a new data transmission...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F30/17G06T17/00
CPCG06F30/17G06T17/00
Inventor 肖文磊张凱尧陈磊
Owner BEIHANG UNIV