NURBS (Non-Uniform Rational B-Splines)-curved surface description-based five-axis linkage 3D printing method

Abstract

The invention discloses an NURBS (Non-Uniform Rational B-Splines)-curved surface description-based five-axis linkage 3D printing method which comprises the following calculating steps: 1, obtaining a basic surface curved surface equation of the bottom of a workpiece; 2, planning a printing route; 3, determining coordinates of all points on a curved surface; 4, determining coordinates of the top end of a printing head; and 5, determining rotational coordinates. According to the NURBS-curved surface description-based five-axis linkage 3D printing method provided by the invention, a curved surface function can be directly generated based on the curved surface of an object, and curved surface printing data are generated with a five-axis linkage 3D printer based on the curved surface function; one curved surface is printed for each layer; and the NURBS-curved surface description-based five-axis linkage 3D printing method is applicable to printing of complicated curved surfaces and objects of which printed parts having non-planar bottoms.

Description

technical field [0001] The invention relates to a 3D printer printing method, in particular to a five-axis linkage 3D printing method based on NURBS curved surface description, and belongs to the technical field of computer 3D printing-aided manufacturing. Background technique [0002] 3D printing technology is a manufacturing method based on layered stacking. The current printing method basically accumulates printing materials layer by layer in the horizontal direction to form the final product. When printing in this method, it is stacked according to each layer. Each layer is either horizontal or flat (in some cases, the printing direction may not be vertical). This method has a simple structure and has been widely used. However, in some cases, this structure cannot fully meet the requirements. First, this structure has a ladder effect during printing, and the printing accuracy is not high. Second, the bottom plate of the 3D printer is usually in a horizontal form. In som...

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Problems solved by technology

However, in some cases, this structure cannot fully meet the requirements. First, this structure has a ladder effect during printing, and the printing accuracy is not high. Second, the bottom plate of the 3D printer is usually in a horizontal form. In some cases, the bottom of the printed part It may be a spherical cavity or other shapes. In this case, it is more appropriate to use a non-horizontal, special-shaped bottom plate support; third, in some cases, it is necessary to grow, wrap or cover the printing material on a device (or core) above the

In the above cases, a printer directly based on a horizontal base plate cannot meet the requirements

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