A method for judging the numerical control manufacturability of a 3D model and a thin wall prediction method

CN121722108BActive Publication Date: 2026-06-09P&R MEASUREMENT INC
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
P&R MEASUREMENT INC
Filing Date
2026-02-25
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In existing technologies, the manufacturability assessment of 3D models before CNC machining is inefficient and inaccurate, the simulation calculation is too large, and it is difficult to identify unmachinable areas and thin-walled structures.

Method used

The 3D model is converted into a height map, and the height is represented by grayscale values. The shape after machining is predicted by simulating the tool diameter, and the reachable and unreachable areas of the tool are determined. The manufacturability is judged by the difference in grayscale values.

Benefits of technology

It enables rapid and accurate manufacturability assessment, reduces computational load, and can automatically identify unprocessable areas and thin-walled structures, improving the efficiency and accuracy of pre-processing analysis.

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Abstract

The application discloses a 3D model numerical control manufacturability judgment method and a thin-wall prediction method, and belongs to the technical field of numerical control machining auxiliary manufacturing. The technical problem to be solved is low artificial detection efficiency or large simulation calculation in the prior art. The technical solution points are as follows: S1, converting a to-be-machined surface of a 3D model into a height map, and recording the height map as an initial height map; S2, converting a cross section of a tool into a planar graph in the form of a height map; S3, traversing the center of the planar graph converted by the tool through each pixel point in the initial height map, determining a replacement gray value in a region covered by the planar graph corresponding to each pixel point, and predicting a surface shape of the 3D model after final machining according to the replacement gray value, and recording the surface shape as a tool-reachable height map; S4, determining a tool-unreachable region based on the initial height map and the tool-reachable height map; and S5, judging the manufacturability of the 3D model based on the tool-unreachable region.
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Citation Information

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