Groove Cross-Section Measurement Using 2D Projection Data
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Solution Overview
Problem
Existing dicing devices require processing loads on control devices for configuring three-dimensional data of machined grooves, leading to increased processing loads and potential inaccuracies in cross-sectional profile calculations.
Innovation Solution
A method and device that acquire three-dimensional coordinate data, generate two-dimensional projection data, and calculate cross-sectional profiles without generating three-dimensional data, utilizing distributed processing across multiple calculation devices to reduce load on control devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If three-dimensional data of the machined groove is configured by stacking XY-plane images or processing three-dimensional coordinate data sets, then the cross-sectional profile can be calculated, but the processing load on the control device increases
Solution Approach 1:
The patent extracts only the necessary two-dimensional projection data from the three-dimensional coordinate data set, rather than processing the complete three-dimensional data. By projecting the 3D data onto a two-dimensional plane perpendicular to the machining feed direction, the system obtains sufficient information for cross-sectional profile calculation while eliminating redundant data processing requirements
Solution Approach 2:
The patent segments the processing task into distinct stages: first acquiring three-dimensional coordinate data, then generating two-dimensional projection data, and finally calculating the cross-sectional profile from the projection data. This segmentation allows the control device to process only the essential projection data rather than handling the entire three-dimensional data set
2Productivity
If cross sections are cut out from three-dimensional data to calculate the cross-sectional profile, then the profile can be obtained, but the accuracy decreases when the groove shape changes in the machining feed direction
Solution Approach 1:
The patent changes the dimensional approach by projecting three-dimensional coordinate data onto a two-dimensional plane perpendicular to the machining feed direction. This dimensional transformation creates projection data that inherently captures the groove shape variations along the feed direction, eliminating the need to select specific cross-section positions and ensuring accurate representation of the groove profile regardless of shape changes
Data Source
AI summary
This groove shape measurement method has a coordinate data acquisition step of acquiring a plurality of pieces of three-dimensional coordinate data (three-dimensional coordinate data set (60)) indicating a shape of a machined groove (9) formed in a machining target object (workpiece (W)) in a machining feed direction (X direction) by a machining device (dicing device (10)) (Step S1), a projection data generation step of generating two-dimensional projection data (62) of the machined groove (9) by projecting the three-dimensional coordinate data onto a two-dimensional plane (two-dimensional plane (61)) perpendicular to the machining feed direction (Step S2), and a cross-sectional profile calculation step of calculating a cross-sectional profile (64) of the machined groove (9) on the basis of the two-dimensional projection data (62) (Step S3).