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A Method for Generating the Center Axis of Arbitrary Quadrilateral Surface for 3D Data Processing of Products

A three-dimensional data and quadrilateral technology, applied in the field of CAD/CAE technology, to reduce the factors of accuracy, ensure the accuracy, and reduce the amount of data

Inactive Publication Date: 2016-06-22
DALIAN POLYTECHNIC UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this algorithm is more suitable for two-dimensional models, and it needs to add additional selection conditions before it can be extended to three-dimensional models

Method used

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  • A Method for Generating the Center Axis of Arbitrary Quadrilateral Surface for 3D Data Processing of Products
  • A Method for Generating the Center Axis of Arbitrary Quadrilateral Surface for 3D Data Processing of Products
  • A Method for Generating the Center Axis of Arbitrary Quadrilateral Surface for 3D Data Processing of Products

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Embodiment Construction

[0040] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention:

[0041] Such as Figure 1-Figure 5 Shown: a method for generating the central axis of an arbitrary quadrilateral surface for three-dimensional data processing of products, which mainly includes the following steps:

[0042] In the step of model decomposition, the sides of the quadrilateral are grouped figure 2 shown. Each side of the quadrilateral is divided into two groups according to the principle of "sides are not adjacent to each other", A 1 and A 2 as a set of constrained edges, edge B 1 and B 2 is another group, which are used as the starting edge and the ending edge respectively. The main consideration for selecting the starting side and the constrai...

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Abstract

The invention discloses an axle wire generating method of a random quadrangular curved surface for product three-dimensional data processing. Combination of a locus method and a movable Frenet frame is adopted, and a simple and quick axle wire generating algorithm is provided. A B-rep three-dimensional solid model which is frequently applied to engineering problems has specific border definition, information of top points, sides and faces of the model are specifically stored in a model file, the specific information can be used for simplifying an axle wire generating method in the traditional locus method, and therefore data size needed in generation of an axle wire is reduced. The specific border information in the B-rep model is used as conditions of the axle wire generating method, calculation of branch points is omitted through features of a bisector, and factors influencing the precision of the axle wire are reduced. Density of inserting points can be controlled to guarantee the precision of the axle wire.

Description

technical field [0001] The invention relates to a method for generating a central axis of an arbitrary quadrilateral surface for three-dimensional data processing of products, and is especially suitable for CAD / CAE technologies such as model simplification, model reconstruction, finite element grid generation, and solid modeling. Relates to patent classification G06 Computing; Calculations; Counting G06T General image data processing or generation G06T17 / 00 3D modeling for computer graphics. Background technique [0002] The central axis is also called the model skeleton or the centerline, and is usually described as follows: In a two-dimensional closed area, there is a disc with variable radius inside the area, keep the disc and the area boundary at least two tangent points, and then move For this disk, when the path of the disk covers all areas, the line formed by the track left by the center of the disk is called the central axis, and is called the central axis in the thr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/20
Inventor 彭健钧李吉平苗苗矫叙伦
Owner DALIAN POLYTECHNIC UNIVERSITY