An Efficient Parallel Layer Slicing Method for STL Models Based on Co-point Welding Sorting

Abstract

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.

Description

technical field [0001] The invention belongs to the field of additive manufacturing, and in particular relates to a high-efficiency parallel layer-slicing method of an STL model based on common-point welding sorting. Background technique [0002] In recent years, additive manufacturing technology has received widespread attention and rapid development, showing broad application prospects and technical advantages in aviation, aerospace, mold, medical and other fields. As a key link of additive manufacturing technology, slice calculation is used to realize the data transformation from 3D part model to 2D slice profile, and plays an important role in linking the preceding and the following in the process of additive manufacturing process data processing. As the standard file format of additive manufacturing, STL files have been focused on by most layer-slicing methods. Therefore, the efficient and high-precision realization of layer-slicing calculations of STL models is crucial...

AI Technical Summary

Problems solved by technology

However, the above methods all need to consume a lot of time for data preprocessing, and in the subsequent slices, it is still necessary to call the triangular patch multiple times to calculate the tangent segment, and to search and compare multiple times to sort the contours. With the topology optimization, lattice design and reverse engineering With the continuous development of engineering and other technologies, the models that need to be processed are becoming more and more complex, and the requirements for slice accuracy are getting higher and higher, which will lead to a continuous decrease in slice efficiency

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