An unsupported 3D printing method based on oblique layering

A three-dimensional printing, unsupported technology, applied in the direction of additive processing, etc., can solve the problems of poor surface quality between the support and the entity, lower printing efficiency, long post-processing time, etc., to save printing raw materials and eliminate the process of support removal , the effect of improving printing efficiency

Active Publication Date: 2018-04-06
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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  • An unsupported 3D printing method based on oblique layering
  • An unsupported 3D printing method based on oblique layering
  • An unsupported 3D printing method based on oblique layering

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0082] Here, a case part generated by three-dimensional 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 slice 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 layers of slices. The model is divided into three parts using horizontal codes and inclined motion codes, and the slice inclination angle and layer height of the two parts of the inclined layered structure. There are also differences. Through calculation, the slice inclination angle is 55 degrees and 74 degrees, and the layer height is ...

Embodiment 2

[0085] Here, a common complex kettle model in daily life is taken as an example to illustrate the effect of the oblique slice track of the present invention in processing complex curved surfaces.

[0086] Such as Picture 9 As shown, the model display also uses the method of zooming up to 5 times to obtain a better visualization effect. The model can be roughly divided into four areas after surface identification. Among them, the inclination angles of areas 1, 3, and 4 are less than 60 degrees, and they are all marked as non-overhanging structures, and can be directly processed by horizontal slices to obtain the processing track, while area 2 has a larger overhanging surface, so the tilt in the present invention is adopted Slicing 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 oblique layering, the layer height is 0.1mm, and the slice inclinatio...

Embodiment 3

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

[0089] Such as Picture 10 As shown, the cantilever beam model includes three parts, a base for bonding the upper structure and the printer platform, a vertical beam and a 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 offset the overturning moment in 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 supporting 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. It consists of multiple oblique slices and horizo...

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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 inclined layering. Background technique [0002] In the past 20 years, three-dimensional (3D) printing (3DP) technology has become a key technology and industrial hot spot widely used in product development. 3D printing can obtain geometric model entities of any shape 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 reduction processing methods. Driven by the needs of personalized customization and processing of complex-shaped parts, 3D printing has been widely used in prototyping, medical and health, electronic circuits, structural industry, aerospace, mold manufacturing and other fields in recent years. [0003] Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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