Improved 3D printing path filling method based on Hilbert curve

Abstract

An improved 3D printing path filling method based on a Hilbert curve comprises the following specific steps of (1) drawing the Hilbert curve, and storing coordinates of all control points of the Hilbert curve; (2) carrying out cubic B-spline curve fitting on the coordinates of the control points, carrying out interpolation smoothing on the fitted curve, and storing all control point coordinates ofthe smoothed curve; (3) drawing an optimized Hilbert curve by utilizing all the control points in the step (2), calculating the length of the curve, performing 3D simulation printing, and calculatingthe steering condition of the motor in each direction during printing; and (4) writing a method of fitting the Hilbert curve by using cubic B spline interpolation into 3D printing slicing software silicc3r, performing path filling and slicing processing on the model by using the silicc3r, finally exporting the model as a G-code code, and performing printing by using a 3D printer. According to theinvention, the condition of right-angle turning is reduced, and the starting and stopping times of the motor are reduced, so that an efficient 3D printing forming path is obtained.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and relates to an improved 3D printing path filling method based on Hilbert curves. Background technique [0002] Fused deposition modeling has become the most vital and fastest-growing technology in 3D printing today due to its fast printing speed and simple work. As a particularly important part of 3D printing, path planning during filling has an important impact on the accuracy, speed, mechanical properties of molded parts and the consumption of consumables. In the process of model printing, the path planning of 3D printing will directly affect the surface quality and mechanical properties of the molded parts. It is mainly manifested in the following aspects: ①The gradient effect appears on the surface of the molded part, which is not only a problem caused by layering, but also caused by improper path planning. This phenomenon is very likely to occur if the parallel filling method is use...

AI Technical Summary

Problems solved by technology

This phenomenon is very easy to occur if the parallel filling method is used at the outermost contour of the ply

②The mechanical properties of the molded parts are poor. The difference in the filling rate in each layer when the path is filled will cause the mechanical properties of the molded parts to be different, and the different shapes of each layer of slices will lead to filling using the same method. different rates, so different filling path algorithms are required for molded parts of different shapes

[0005] However, there are too many right-angle inflection points in the Hilbert curve during printing, so that the motors in the x and y directions of the printer run alternately and the speed changes drastically. There is a problem of frequent motor start and stop, which greatly reduces the printing efficiency and the service life of the motor. and the precision of molded parts

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