Five-coordinate NC tool track fast generation method for scattered point cloud data

Abstract

The invention provides a rapid generation method of a five-axis NC tool path of scattered point cloud data. The method is characterized in that a spatial clustered index structure of the scattered point cloud is established firstly, then a data point set of a section of the tool path is rapidly obtained based on the structure, and a normal vector of the data points of the section is determined according to the local differential geometrical properties of, the data points of the section, and tool position points corresponding to the data points of the section are calculated by the space projection method, the tool position point set is sorted by the minimal spanning tree algorithm to generate the tool path, the generated tool path is cut and modeled based on a triangular mesh surface model, the generation precision of the tool path is detected, and the tool path generation parameters are corrected based on the detection result, and finally the five-axis NC tool path meeting the precision requirements is obtained. Examples prove that the method can quickly and efficiently obtain the five-axis NC tool path of the scattered point cloud data, accurately detect the precision of the obtained tool path, and realize rapid profiling manufacture of complex curved surface products.

Description

Technical field [0001] The invention provides a method for quickly generating a five-coordinate NC tool path of scattered point cloud data, which belongs to the technical field of computer-aided manufacturing. Background technique [0002] Directly generating tool paths based on scattered point cloud data can not only reduce the tedious process of surface reconstruction or mesh generation, but also avoid the problem of error accumulation caused by surface fitting, which is beneficial to simplify the process of obtaining tool paths and shorten the development cycle of new products. , Reduce product development costs, but due to the large amount of scattered point cloud data and the lack of a fast and effective detection mechanism for generating tool paths, the direct generation of five-axis NC tool paths is a key issue that restricts the current reverse engineering simulation manufacturing. [0003] A search of the prior art literature found that Xie Lai et al. published an academ...

AI Technical Summary

Problems solved by technology

[0004] To sum up, the defects of the existing technology are: the lack of an effective and reasonable index structure for scattered point cloud data, which restricts the generation efficiency of tool paths; The tool track accuracy detection mechanism cannot quickly detect the tool track accuracy

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