3D printing supporting area generation method based on supporting point expansion fusion

A technology of 3D printing and expansion fusion, applied in geometric CAD, instrumentation, electrical digital data processing, etc., can solve problems such as difficulties in generating support areas, and achieve the effect of clear algorithm logic and design, good robustness, and wide application range

Active Publication Date: 2021-05-28
ZHEJIANG UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

Since the points in the patch are distributed in disorder, there ar

Method used

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  • 3D printing supporting area generation method based on supporting point expansion fusion
  • 3D printing supporting area generation method based on supporting point expansion fusion
  • 3D printing supporting area generation method based on supporting point expansion fusion

Examples

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Embodiment Construction

[0070] Taking the "F" model as an example, the embodiments of the present invention will be further described in detail in conjunction with the accompanying drawings. The following examples do not limit the present invention.

[0071] A flow chart of a 3D printing support region generation method based on support point expansion and fusion is shown in figure 1 As shown, the specific implementation steps are as follows:

[0072] Step 101: Input the model "F" data and its surface patch data, and set the initial mesh side length L 0 and support critical angle θ 0 , a model such as figure 2 a;

[0073] Step 102: According to the model extreme value and L 0 Generate a uniform projection grid node set Q on the XY plane, the grid nodes such as figure 2 as shown in b.

[0074] Before generating the grid node set Q, first according to the model extreme value and L 0 The optimal adjustment of the grid side length is as follows:

[0075] The extreme values ​​of the model in the...

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Abstract

The invention provides a 3D printing supporting area generation method based on supporting point expansion fusion, and the method comprises the steps: carrying out the slicing of a supporting line segment based on the supporting line segment, and obtaining a supporting point set of a current layer; setting a rectangular influence area with the supporting point as the center, and successfully converting the supporting point into a supporting contour area; and meanwhile, carrying out offset operation carried out on the model contour, and carrying out Boolean operation on the support contour area and the offset model contour, so that the problem that the support invades the model is solved, and the problem that the model is separated from the support after printing is effectively solved. The supporting area generation method can be applied to a complex model to automatically generate a layered supporting contour region, the algorithm logic and design are clear, the robustness is good, and the application range is wide.

Description

technical field [0001] The invention belongs to the technical field of CAM (Computer aided manufacturing), and in particular relates to a 3D printing support region generation method based on support point expansion and fusion. Background technique [0002] With the rapid development of computer technology and material forming technology, 3D printing technology has become an advanced manufacturing technology widely used in the current manufacturing field. Using the principle of layered manufacturing, 3D printing technology accumulates materials layer by layer to achieve design, especially suitable for manufacturing three-dimensional parts with complex shapes and topologies. [0003] Since the printing process is a "building block" accumulation process, when printing the suspended parts, the material extruded by the extrusion head cannot adhere to the object to be printed. It is necessary to identify the suspended parts and add supports during printing planning to realize the...

Claims

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Application Information

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IPC IPC(8): G06F30/10G06F113/10
CPCG06F30/10G06F2113/10
Inventor 林志伟刘博胡玘瑞傅建中
Owner ZHEJIANG UNIV
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