AC corner optimization method for five-axis 3D printing line cutting path planning

Abstract

The invention provides an AC corner optimization method for five-axis 3D printing line cutting path planning. The AC corner optimization method comprises the following steps that 1, the forming direction is selected according to the characteristics of a printing model; 2, all curved surface layers where the printing paths are located are recognized, the printing path on one curved surface layer is located on one curved surface, and each curved surface layer refers to an optimization unit of the AC corner; and 3, an AC corner optimization objective function and constraint conditions are constructed, all path lines of all optimization units are sequentially optimized according to the printing sequence, and the optimal AC corner distribution on 3D printing line cutting paths of all the curved surface layers is obtained. According to the method, the normal vector of the nozzle axis and the machining surface is within the maximum deviation tolerance range delta; the AC corner of the adjacent point is within the deviation tolerance range phi; the nozzle does not need to be lifted in the printing process, continuous printing can be conducted till workpiece printing is finished, and the printing efficiency is improved; and overcutting of the workpiece is avoided, the workpiece can be protected against damage, and the printing quality of finished workpiece products is improved.

Description

technical field [0001] The invention relates to the technical field of five-axis 3D printing, in particular to an AC corner optimization method for line-cut path planning of five-axis 3D printing. Background technique [0002] In recent years, 3D printing technology has been widely used in various fields such as medical treatment and aerospace. Different from traditional subtractive manufacturing technologies such as milling and turning, 3D printing technology converts the 3D information of the workpiece into Gcode files that can be recognized and executed by the 3D printer through slicing, layering and path planning of the 3D model to be processed. Adding materials layer by layer during the process can result in complex structures that are difficult to manufacture with traditional manufacturing techniques. [0003] The model slicing algorithm widely used in 3D printing is an algorithm based on the STL model format. The two core technologies of 3D printing are layered slic...

AI Technical Summary

Problems solved by technology

The existing multi-axis path planning research found that when the printing nozzle axis coincides with the normal direction of the layer-by-layer accumulation surface of the workpiece, the printing quality of the workpiece is optimal, but if the difference in the rotation angle of adjacent points on the processing path is too large, the workpiece may be damaged. Overcut

In the case of limited rotation angle optimization, the damage to the workpiece can only be avoided by lifting the printing nozzle and rotating the workpiece, but this treatment method cannot avoid the damage of the extruder caused by the nozzle not extruding the wire for a long time in the heated state, and the lifting nozzle Reduced printing efficiency

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