Space path generating methodorientedto multi-freedom-degree 3D printing

Abstract

A space path generating methodorientedto multi-freedom-degree 3D printing comprises the steps that a three-dimensional part model is firstly established and an auxiliary model and a supporting model are generated by utilizing computer aided design (CAD) software, and then a part path is generated; then, the part path undergoes reverse ranking to generate a front-inside-to-outside 3D printing path, meanwhile printing action matching parameters required by a motion mechanism moving along the printing path are calculatedby adopting a 3D printing process; then the supporting model is introduced to the 3D printing path to generate software, and a supporting path is generated; normal vector information is added for the supporting path, and a posturecomponent of a printing head in a multi-freedom-degree 3D printing system is calculated through normal vectors; finally the generated supporting path and the part path are introduced to the multi-freedom-degree 3D printing system, and multi-freedom-degree 3D printing is completed. The space path generating method eliminates the step effect existing in an existing 3D printing technology, improves the mechanical properties of parts and increases the isotropy of the parts.

Description

Technical field [0001] The invention relates to the technical field of multi-degree-of-freedom 3D printing, in particular to a method for generating a space path for multi-degree-of-freedom 3D printing. Background technique [0002] 3D printing technology has the characteristics of forming parts of any shape. Traditional 3D printing technology usually adopts a three-degree-of-freedom movement method, which can only be stacked layer by layer on a fixed two-dimensional plane, so it will produce a "step effect" and affect the molding accuracy. . In addition, since the 3D printing molding process is stacked layer by layer along one direction, the mechanical properties in the layering direction are significantly lower than in other directions, showing anisotropy. Forming accuracy and mechanical properties limit the development and application of 3D printing. The use of a multi-degree-of-freedom motion system can break through the limitations of traditional 3D printing, so that print...

AI Technical Summary

Problems solved by technology

[0002] 3D printing technology has the characteristics of being able to form parts of any shape. Traditional 3D printing technology usually uses a three-degree-of-freedom movement method, which can only be formed layer by layer on a fixed two-dimensional plane, so it will produce a "step effect" and affect the forming accuracy.

[0003] 1) At present, there is a lack of systematic research on multi-degree-of-freedom 3D printing methods, and there is no general 3D space path generation method. The traditional 3D printing path generation is based on plane layering and path planning on a two-dimensional plane to obtain printing trajectories. For space There is no method for the layering of curved surfaces and the generation of non-planar paths in space, which cannot achieve flexible, efficient and stable 3D printing with multiple degrees of freedom;

[0004] 2) The existing 3D printing path generation method does not realize the real-time control of the nozzle pose, and cannot print along the normal direction of the surface in real time, and it is difficult to meet the process requirements of the multi-degree-of-freedom 3D printing method

However, at present, the application of computer-aided manufacturing (CAM) technology in the field of 3D printing is very small. The path generation method of process characteristics cannot be directly applied to multi-degree-of-freedom 3D printing

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