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Non-support three-dimensional printing method based on inclined layering

A 3D printing, support-free technology, applied in the direction of additive processing, etc., can solve the problems of poor surface quality between supports and entities, waste of printing materials, long post-processing time, etc., to save printing raw materials, improve printing efficiency, save Effect of the process of support removal

Active Publication Date: 2016-08-31
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This process will lead to poor surface quality between the support and the solid, waste of printing materials, reduced printing efficiency, long post-processing time, etc.

Method used

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  • Non-support three-dimensional printing method based on inclined layering
  • Non-support three-dimensional printing method based on inclined layering
  • Non-support three-dimensional printing method based on inclined layering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Here, a shell part generated by 3D design software is taken as an example to illustrate the trajectory code processing process and the final algorithm execution effect of the present invention.

[0083] Such as Figure 8 As shown, the model has common design elements such as plane features, hole features, and shell features. Its size is 80mm*80mm*80mm. In order to demonstrate the actual oblique slicing principle and visualization effect of the present invention, Figure 8 The layer height in is set to 5 times (0.5mm ~ 1.5mm) in the actual algorithm. It can be clearly seen from the figure that the printed model is discretized into slices layer by layer, and the model is divided into three parts in total, using horizontal codes and inclined motion codes respectively, and the two parts are oblique layered structure slice inclination angle and layer height There are also differences. By calculation, the inclination angles of slices are 55 degrees and 74 degrees respectiv...

Embodiment 2

[0085] Here, a common complex kettle model is taken as an example to illustrate the effect of the oblique slice trajectory of the present invention when dealing with complex surfaces.

[0086] Such as Figure 9 As shown in the model display, the method of magnifying the layer height to 5 times is also used to obtain a better visualization effect. The model can be roughly divided into four regions after surface identification. Among them, areas 1, 3, and 4 whose inclination angles are less than 60 degrees are all marked as non-overhanging structures, and can directly use horizontal slices to obtain processing tracks, while area 2 has a relatively large overhanging surface, so the inclination in the present invention is adopted slice method. Area 1, Area 3, and Area 4 all use a layer height of 0.2mm, and the printing speed and filling rate are the same as in Example 1. Area 2 is used as the processing section of inclined layering, with a layer height of 0.1 mm and a slice ang...

Embodiment 3

[0088] Here, a typical cantilever beam model is taken as an example to illustrate the processing effect of the inclined slice trajectory of the present invention on the limit overhang structure.

[0089] Such as Figure 10 As shown, the cantilever beam model includes three parts: the base for bonding the upper structure with the printer platform, the vertical beam and the suspension beam. The triangular base is designed with a larger area, mainly to improve the adhesion between the model and the printer platform, and to counteract the overturning moment during the printing process. The main structure of the cantilever beam shown in area 3 is in a horizontal state and is in the limit printing position with an inclination angle of 90 degrees. When there is no support structure, due to the effect of gravity, the accumulation of materials cannot be achieved by horizontal layering. The slicing result shown in the figure is similar to that of Example 1, consisting of multiple obliq...

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PUM

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Abstract

The invention discloses a non-support three-dimensional printing method based on inclined layering. The method comprises five steps of model surface overhanging area identification, model reestablishment, horizontal slicing, motion code coordinate transformation, and path coupling; a path includes two parts: a horizontal layered path and an inclined layered path. A path track inclined relative to a horizontal plane is formed at an overhanging part; when the region is printed, a new layer of material can be guaranteed to be not only suffered from gravity but also is suffered from an adhesive force in a deposition process due to the presence of a formed printing layer on an upper layer. An additional supporting material is omitted, a printing raw material is saved, the printing efficiency is improved, and a process of subsequent support removal is omitted. The inclined layered three-dimensional printing path provided by the invention has a common code format, can be directly applied in commercial and open-source desktop type three-dimensional printers, has extensive application prospects, and can be extended to the three-dimensional printing technology in biology, chemical engineering, macromolecule and food industries.

Description

technical field [0001] The invention relates to the fields of three-dimensional printing (3D printing) and computer-aided path planning (CAM), in particular to an unsupported three-dimensional printing method based on oblique layering. Background technique [0002] In the past 20 years, three-dimensional (3D) printing (3DP) technology has become a key technology and industry hotspot widely used in product development. 3D printing can obtain geometric model entities of arbitrary shapes by superimposing printing materials layer by layer on the formed surface. 3D printing is low cost when used in small batch manufacturing, and can obtain entities that cannot be obtained by traditional subtractive processing methods. Driven by the demand for personalized customization and complex shape parts processing, 3D printing has been widely used in prototype manufacturing, medical and health care, electronic circuits, structural industry, aerospace, mold manufacturing and other fields in...

Claims

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Application Information

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IPC IPC(8): B29C67/00B33Y30/00
CPCB29C67/00B33Y30/00
Inventor 傅建中赵海明贺永
Owner ZHEJIANG UNIV
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