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. 2022 Sep 4;15(17):6139.
doi: 10.3390/ma15176139.

Development of a Three-Dimensional Optical Verification Technology without Environmental Pollution for Metal Components with Different Surface Properties

Chil-Chyuan Kuo  1   2 , Zong-Yan He  1 , Chil-Xian Lee  3
Affiliations

Development of a Three-Dimensional Optical Verification Technology without Environmental Pollution for Metal Components with Different Surface Properties

Chil-Chyuan Kuo et al. Materials (Basel). .

Abstract

Nowadays, the optical measuring approach is widely used in the precision machining industry due to high measurement efficiency. In the industry, measuring devices play a crucial role in the field of quality assurance. In practical engineering, the green measurement approach indeed plays an important role in the industry currently. In this study, a state-of-the-art green technique for three-dimensional (3D) optical measurements without environmental pollution is demonstrated, which is an environmentally friendly optical measurement method. This method can perform precise optical measurement without matte coatings. This work dealt with the possibility of measuring four metal components that were not sprayed with anything. The differences in the optical measurement results between with and without matte coatings were investigated and analyzed. It was found that the research result has practical value in the precision machining industry because average size errors of the four measurement objects with different surface properties can be controlled at about 3 µm, 0.1 µm, 0.5 µm, and 9 µm. A technical database with industrial value was established for optical measurements of metal components with different surface properties without matte coatings, which can serve as an alternative to the conventional 3D optical measurement.

Keywords: average size error; environmental pollution; matte coatings; optical measurement; three-dimensional.

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Conflict of interest statement

The authors declare no conflict of interest.

Figures

Figure 1
Figure 1
Research process of this study.
Figure 2
Figure 2
Calibration process before optical measurements.
Figure 3
Figure 3
As-cast part after labeling the points.
Figure 4
Figure 4
Measurement results of the as-cast turbine blade that was sprayed with a mixture of TiO2 powder and ethanol before optical measurements.
Figure 5
Figure 5
Measurement results of the as-cast turbine blade that was not sprayed with a mixture of ethanol and TiO2 powder.
Figure 6
Figure 6
CAV results of the as-cast turbine blade.
Figure 7
Figure 7
Average size error of the eight test groups compared to conventional method for the as-cast part.
Figure 8
Figure 8
Measurement results of the cast part after CNC machining that was sprayed with a mixture of TiO2 powder and ethanol before 3D optical measurement.
Figure 9
Figure 9
Measurement results of the cast part after CNC machining that was not sprayed with a mixture of ethanol and TiO2 powder.
Figure 10
Figure 10
CAV results of the cast part after CNC machining.
Figure 11
Figure 11
Average size error of the eight test groups compared to conventional method for the cast part after CNC machining.
Figure 12
Figure 12
Measurement results of the glossy sheet metal that was sprayed with a mixture of TiO2 powder and ethanol before optical measurements.
Figure 13
Figure 13
Measurement results of the glossy sheet metal that was not sprayed with a mixture of ethanol and TiO2 powder.
Figure 14
Figure 14
CAV results of the glossy sheet metal.
Figure 15
Figure 15
Average size error of the eight test groups compared to conventional method for the glossy sheet metal.
Figure 16
Figure 16
Measurement results of the circuit board that was sprayed with a mixture of TiO2 powder and ethanol before optical measurements.
Figure 17
Figure 17
Measurement results of the circuit board that was not sprayed with a mixture of ethanol and TiO2 powder.
Figure 18
Figure 18
CAV results of the circuit board.
Figure 19
Figure 19
Average size error of the eight test groups compared to conventional method for the circuit board.
See this image and copyright information in PMC

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