An efficient parallel layer cutting method for STL model based on co-spot welding scheduling
A layer-cutting and model-based technology, applied in the field of additive manufacturing, can solve problems such as reduced layer-cutting efficiency and complex model-cutting accuracy, and achieve the effects of reducing construction time, improving layer-cutting efficiency, and improving layer-cutting efficiency
Active Publication Date: 2019-02-12
NANJING UNIV OF SCI & TECH
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The invention discloses an efficient parallel layer cutting method for an STL model based on co-spot welding scheduling. The method comprises the steps of firstly reading the index information of vertices and edges of a triangular patch constructed by reading an STL model to obtain vertex coordinates, vertex indexes and edge indexes of all triangular patches, and storage containers containing triangular patch information; then calculating all tangent segments, and assigning a mark number to each end point of the tangent segment, and obtaining the total number of tangent segments according to the minimum and maximum values of the tangent segments thickness and the model in the axial direction; using the set of tangent planes intersecting the triangular patches, calculating the tangent segments intersecting the triangular patches and the tangent planes, and assigning each end point of the tangent segments with a unique mark number; then calling the cutting layers layer by layer, and calling all the tangent segments in the layer for vertex welding, and obtaining a completely closed cutting layer outline by merging the repetitive points to construct an association map, and deleting redundant points and storing in the outline set of the current layer; at the end of the slice calculation, outputting the slice contour. The method of the invention can reduce the layer cutting time of the STL model.
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