Multi-axis machining interference detection and processing method based on two-stage voxelization model

Abstract

The invention belongs to the field of computer aided manufacturing, and discloses a multi-axis machining interference detection and processing method based on a two-stage voxelization model, comprising the following steps of: 1) establishing a two-stage voxelization model according to the input workpiece STL model to be processed; 2) removing redundant point and redundant side information in a triangular mesh model, and establishing the topological relationship between triangular meshes; 3) finding the algorithm for passing the voxel through a seed triangle mesh; 4) searching for its topological neighborhood A in a certain voxel according to a seed triangle; 5) performing local interference detection and processing on a generated basic processing path; 6) performing global interference detection on the generated basic processing path; and 7) performing a global interference processing algorithm for the two-stage voxel model. The method adopts a two-stage voxel model, and can quickly locate the spatial coordinate point to the spatial topological position of the model. Therefore, when performing the spatial object intersection test, the method has high superiority in the aspect of efficiency.

Description

technical field [0001] The invention belongs to the field of computer-aided manufacturing, and more specifically relates to a multi-axis machining interference detection and processing method. Background technique [0002] Machining path interference usually refers to the phenomenon that the machining tool collides with the workpiece when it travels along the machining path due to the spatial shape characteristics of the workpiece to be processed during the subtractive forming process. At present, in the process of arc welding additive manufacturing, there is also the problem of interference between the welding gun and the formed part. [0003] The interference phenomenon can be divided into local interference and global interference: local interference refers to the overcut phenomenon between the tool head and the surface of the workpiece to be processed; global interference refers to the spatial collision between the tool and the workpiece. [0004] In order to avoid and ...

AI Technical Summary

Problems solved by technology

Although the number of traversal grids can be reduced by algorithms such as sorting and bounding boxes, it is still impossible to fundamentally solve the problem of high time complexity

[0007] Therefore, when dealing with the interference problem of adding / subtracting material forming processing paths, especially when the STL model is used as the input model, the spatial topology information cannot be provided in the current various algorithms, resulting in the collision detection process of the workpiece and the tool mesh model The time complexity is too high, which affects the efficiency and practicality of the interference detection / processing algorithm

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