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Abstract
Current freeform surface (FFS) characterization systems mainly cover aspects related to computer-aided design/manufacture (CAD/CAM). This paper describes a new approach that extends into computer-aided inspection (CAI).The following novel features are addressed:■ Feature recognition and extraction from surface data■ Characterisation of properties of the surface's M and N vectors at individual vertex■ Development of a measuring plan using a toolmakers microscope for the inspection of the FFS■ Inspection of the actual FFS produced by CNC milling■ Verification of the measurement results and comparison with the CAD design dataTests have shown that the deviations between the CAI and CAD data were within the estimated uncertainty limits.
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