A real-time variable width 3D printing path construction method

Abstract

The invention belongs to the technical field of three-dimensional (3D) printing, and particularly discloses a construction method for a three-dimensional (3D) printing path with the real-time variablewidth. The method comprises the following steps of constructing a 3D model of a part to be manufactured; layering the 3D model, and obtaining a slice at each layer; obtaining a central axis and a skeleton line of each slice; dividing the skeleton line into two parts by adopting the corresponding central axis as a center, and recording as a first half area and a second half area; sequentially ranking the skeleton lines along the directions of the central axes; calculating the maximum skeleton line length and the minimum skeleton line length in the skeleton lines at the first half area and thesecond half area, and determining the optimal path points of the first half area and the second half area; and determining the position of each path point according to the optimal path points, and then sequentially connecting the path points so as to generate the printing path. According to the construction method for the 3D printing path with the real-time variable width provided by the invention, the occurrence of a step effect and a cavity can be reduced, the idling stroke during the processing process is less, and the method has high processing efficiency.

Description

technical field [0001] The invention belongs to the technical field of 3D printing, and more specifically relates to a real-time variable-width 3D printing path construction method. Background technique [0002] 3D printing (Three-dimensional printing) is a common name for additive manufacturing technology (Additive Manufacturing, AM). It is a technology that uses discrete materials to accumulate layer by layer based on three-dimensional CAD design data. Compared with traditional material processing methods, 3D printing technology turns three-dimensional solid processing into a discrete stacking process from point to line, from line to surface, and from surface to body. According to traditional path planning and process differences, 3D printing can be divided into the following types: Selective Laser Sintering (SLS), Fused Deposition Modeling (FDM), Three-dimensional Printing (3DP), and Digital Light Processing (DLP) , Layered entity manufacturing (LOM). In recent years, s...

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Problems solved by technology

For example, patent CN201720710937.7 proposes an extrusion device suitable for architectural 3D printing, which can change the nozzle diameter in real time during the printing process, so as to achieve the effect of variable width printing, but for the path construction method of variable width 3D printing, it needs to be done. further research

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