Model area change rate-based adaptive hierarchical processing method

Abstract

The invention discloses a model area change rate-based adaptive hierarchical processing method. The method comprises the following steps of importing an STL model and establishing a model topological structure; performing uniform hierarchical slicing on the model with the highest precision, obtaining a two-dimensional polygon contour layer and calculating an area of each layer of a polygon after slicing; performing derivation on the area of each layer of the polygon to obtain an area change rate of the model; comparing the calculated area change rate with a threshold according to a relationship between the area change rate of the model and the printing precision, and obtaining a printing precision distribution situation of the model in a printing direction; calculating hierarchical layer thickness data required for model printing, and performing processing by using a rounding-off method to generate adaptive hierarchical layer thickness data; and reading the hierarchical layer thickness data by a slicing engine, and performing adaptive layer thickness slicing on the model to obtain a gcode file required for printing. According to the method, while the detail characteristics of the model are ensured, the forming speed of the model is increased, and the printing time is effectively shortened.

Description

technical field [0001] The invention relates to an adaptive hierarchical processing method based on the rate of change of model area, and belongs to the technical field of computer integrated manufacturing. Background technique [0002] 3D printing technology is a rapid prototyping manufacturing technology, also known as additive manufacturing technology (Additive Manufacturing), which mainly uses plastic wire, metal powder, photosensitive resin, cells, etc. as raw materials to obtain three-dimensional data through a computer or scanner, and convert the data It is transmitted to the 3D printer through a serial port or wireless, and the 3D printer processes the raw materials layer by layer through high-temperature melting, laser irradiation, and chemical solidification to produce a solid model. 3D printers are also known as universal manufacturing machines. The Economist magazine called 3D printing technology "an important symbol of the third industrial revolution" in 2012. ...

AI Technical Summary

Problems solved by technology

At present, these slicing softwares slice the model evenly with the same layer thickness, which causes a contradiction between the molding speed and the molding accuracy in the printing process. When the details of the model are high and high-precision printing is required, the model needs to be reduced. The setting of layer thickness increases the number of layers to be printed, resulting in an increase in the time spent on model forming; when it is necessary to quickly obtain a solid model, the modeling time of the model has to be reduced. To reduce the forming time, it is necessary to increase the setting of layer thickness to make the model shape The rear surface is rough and the accuracy cannot be guaranteed

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