Surface-exposure-based multi-degree-of-freedom 3D printing method, device and system

Abstract

The invention discloses a surface-exposure-based multi-degree-of-freedom 3D printing method, and relates to the technical field of 3D printing. The method solves the technical problem that a support needs to be additionally arranged during workpiece manufacturing and then consumables are increased. The method comprises the following steps that firstly, a triangular patch on the surface of a printing model is partitioned, the triangular patch in the area is normalized to obtain an outer normal vector of the area face, and the area face and the corresponding outer normal vector are put into an area set; and then, the candidate substrate intersection surface and parameters of the printing model are searched, and based on the candidate substrate intersection surface and the area set, the cutting surface is found so that the printing model can carry out unsupported printing by taking the candidate substrate intersection surface and the cutting surface as the bottom. The invention further discloses a surface-exposure-based multi-degree-of-freedom 3D printing device and system. According to the printing method, device and system, support is not needed to be additionally arranged, so thatthe product quality is improved while consumables are reduced. The manufacturing direction variability improves the flexibility of the slicing direction, the number of slicing layers is increased, andthe fine degree of the model is also improved.

Description

technical field [0001] The present invention relates to the technical field of 3D printing, more specifically, it relates to a multi-degree-of-freedom 3D printing method, device and system based on surface exposure. Background technique [0002] 3D printing technology is also called rapid prototyping technology. Different from the traditional casting process, 3D printing technology processes the workpiece through computer software. By adding support to the workpiece, layering the workpiece to generate a path plan, the forming system achieves the purpose of making the workpiece according to the path planning. As a new rapid prototyping method, 3D printing technology has now derived a variety of fairly mature printing methods such as FDM, SLA, DLP, SLM and other technologies, all of which have their own advantages. But no matter which method is used, it is inevitable to face the problem of setting and removing the printing model support. The traditional printing method at le...

AI Technical Summary

Problems solved by technology

The setting of printing support has a great influence on the printing model, and it is also very important for the post-processing of the model support after printing. The removal of printing support especially affects the surface fineness of the model; at the same time, no matter what kind of support structure is added, printing materials will be wasted

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