3D continuous route generation method for fused deposition manufacturing

Abstract

The invention relates to a 3D continuous route generation method for fused deposition manufacturing. The method comprises the following steps: obtaining a group of slices for processing a triangular surface patch model based on the printing direction and layer thickness, and obtaining a closing boundary of each given communication zone; sequentially accessing each layer from the communication zonewith the maximum area of the slices at the first layer; sequentially selecting the next communication area based on the area of zone, distance and collision detection relation, and building a communication sub-zone array to be treated; sequentially generating continuous 2D filling routes of which entrances are close to exits for each communication sub-zone in the communication sub-zone array to be treated; and connecting the entrances and the exits of filling routes in adjacent communication sub-zones in the communication sub-zone array to be treated so as to generate the 3D continuous filling route. The experiment verifies that the method is applicable to fused deposition printing technologies on the basis of continuous reinforced carbon fiber materials, continuous biological fiber materials and continuous glass fiber materials; an additional front end fiber cutting device is not designed, so that the cost is decreased; and the difficulty in post-treatment is reduced.

Description

technical field [0001] The invention relates to the field of additive manufacturing, in particular to a path generation method based on continuous fiber printing in a fusion deposition process. Background technique [0002] Fused deposition modeling (FDM) is the most widely used system in modern additive manufacturing (AM) due to its relatively low material cost and good ease of use. The FDM process most commonly uses continuous polymer filaments as a raw material to build a 3D model by building them up layer by layer. Therefore, the formed structure shows typical anisotropy, the interlayer strength is poor, and the strength within the layer is also affected by the laying path of the polymer filaments, and the manufactured model is prone to delamination and fracture. [0003] In order to improve the poor mechanical properties of the fabricated models using the fused deposition process, a common approach is to add fiber or particle reinforcement to form composites to improve...

AI Technical Summary

Problems solved by technology

Considering that different types of fibers have different physical properties, it is very difficult to design an effective universal cutting mechanism. At the same time, it needs to cooperate with the empty stroke path for frequent cutting during the printing process, which will easily cause unstable operation and increase maintenance costs.

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