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Hierarchical algorithm of selective laser sintering

A laser sintering and layering algorithm technology, which is applied in computing, special data processing applications, instruments, etc., can solve the problems of slicing accuracy and error compensation, so as to improve accuracy, reduce memory usage, and improve layered processing efficiency Effect

Inactive Publication Date: 2013-10-23
UNIV OF JINAN
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Problems solved by technology

[0008] In order to overcome the shortcomings of the above-mentioned existing technologies, a layered algorithm for selective laser sintering is provided, which solves the problem that the existing algorithm cannot balance the slicing accuracy and error compensation

Method used

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  • Hierarchical algorithm of selective laser sintering

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Embodiment Construction

[0045] Such as figure 1 As shown, a layered algorithm of selective laser sintering of the present invention is used to establish an accurate product model, comprising the following steps:

[0046] Step 1: Read in and display the STL file. Since the STL file has two storage formats, ASCII and binary, the format of the file should be detected first, and the triangle surface information of the model should be calculated, and then the triangle surface information is read and saved. After the data is read, the related Directx11 is called function to display. Wherein, the information of the triangular face includes: the normal vector of the triangular face, three vertices and three edges.

[0047] Step 2: Partial encryption of the STL model. Firstly, the concave-convex feature of the model is judged according to the angle criterion and the gradient criterion, and then the feature is verified according to the positive or negative of the product C of the normal phase vector of the ...

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Abstract

The invention provides a hierarchical algorithm of selective laser sintering, which is used for establishing a precise product model. A method comprises the following steps: (1) reading and displaying an STL file; (2) locally encrypting an STL model; (3) selecting a layered slice plane; (4) sorting the layered slice plane; (5) compensating a positive and negative error; and (6) outputting a model. According to the hierarchical algorithm, through establishing a dynamic facet table for different tangent planes, the usage mount of a memory is lowered, time required by topological information is reduced, and the efficiency of hierarchical processing is improved; and meanwhile, through the method of locally encrypting the model and compensating the positive and negative error, the precision of the model is greatly increased, and a strong technical support is provided for the improvement of the precision of part manufacturing.

Description

technical field [0001] The invention belongs to the field of laser processing rapid prototyping, and in particular relates to a layered algorithm of selective laser sintering. Background technique [0002] With the rapid popularization of computer technology and the wide application of CAD / CAM technology, products have made great progress from design modeling to manufacturing, and the product development cycle, production cycle, and update cycle are getting shorter and shorter. Therefore, in the face of a rapidly changing and unpredictable buyer's market, the traditional mass production model in the past has become more and more slow and passive in responding to the market. Rapid response to market demand has become an important trend in the development of the manufacturing industry. Rapid prototyping technology was developed under the background of rapid response to the market and meeting user needs. And is widely used in machinery, materials, electronics, medicine and oth...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
Inventor 王玉增韩婧茹李广亚
Owner UNIV OF JINAN
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