Generating method for printing path used for light three-dimensional model printing

Abstract

The invention relates to a generating method for a printing path used for light three-dimensional model printing and belongs to the technical field of forming. The method comprises the following steps that 1, a minimum bounding box of a model is determined according to the size of the model; 2, the bounding box is sliced to form multiple same slice layers; 3, a rectangular coordinate system is set up on the same plane of the slice layers; 4, with a minimal value point of the rectangular coordinate system where the slice layers are located as a starting point, the rectangular coordinate system is filled with multiple cellular path units with the side length being 1 and the gap between the cellular path units being d until the whole slice layers are covered; 5, the slice layers are tailored according to actual filling areas of all the slice layers to obtain the printing path of the slice layers. The filling path for light three-dimensional printing is generated, by filling the slice layers with the complete cellular path units, the problem of multi-end-point piling caused by repeated wiring is avoided, and the problem that the printing structure is irregular is avoided.

Description

technical field [0001] The invention relates to a method for generating a printing path, which belongs to the technical field of forming. Background technique [0002] With the continuous development of 3D printing manufacturing technology, people have higher and higher requirements for energy saving, consumption reduction, and rapid manufacturing. The lightweight structure with the goal of weight reduction and high performance has attracted more and more attention. At present, the generation methods of lightweight structures based on 3D printing technology mainly fall into the following two categories: The first type is to design lightweight structures using geometric solid modeling before slicing the model, such as designing complex holes or trusses inside the model structure. The second type is the scanning path planning after the model is sliced. By filling some regular mesh paths (such as honeycomb scanning paths, rhombus scanning paths, and fractal scanning paths) ins...

AI Technical Summary

Problems solved by technology

Three groups of parallel discontinuous straight-line paths are used to construct the honeycomb scanning path. Since this method uses discontinuous scanning in three directions, there are three repeated scans at the end of the path, which makes the end point over-accumulated. At the same time, discontinuous scanning in three directions is used. It also causes a large number of idle strokes and knife jumps on the cutting layer, which seriously affects the molding quality and efficiency

Ponnusamy.P and GurunathanSaravanaKumar et al. mentioned in Virtual and Physical Prototyping, 2009, 4(3): 165-180, "Personalised bone issue engineering scaffold with controlled architecture using fractal tool path in layered manufacturing [J]" and mentioned in Virtual and Physical Prototyping (2009, 14: 9, 2009) Fractalrastertoolpathsforlayeredmanufacturingofporousobjects[J]"uses different fractal curves to fill the cut layers of medical biological scaffolds, and realizes porous medical model manufacturing by changing the type and filling density of fractal curves. The defect of this method is that when the unit step of the fractal curve When larger, the filaments on adjacent paths will not overlap each other, and the strength of the printed model will be lower

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