The thesis deals with a process of 3D metrology-assisted assembly (C-Track + artifacts). 3D metrology-assisted assembly is gaining popularity in the manufacturing industry, especially in the aerospace and automotive industries. Indeed, this technology offers a higher measurement accuracy than traditional methods and allows real-time monitoring of assembly operations. Contactless measurement systems, such as photogrammetry and laser scanning, allow components to be measured quickly and accurately. The measurement data can then be used to guide operators in real-time assembly, verify part compliance, and identify assembly defects. 3D metrology-assisted assembly systems also have improved quality and reduced costs associated with assembly errors.
The work begins with a review of state of the art in various measurement and prediction techniques for part assembly, positioning and inspection, active tooling, and closed-loop assembly. The study also examines contact and non-contact measurement systems, such as CMM, photogrammetry, and iGPS, as well as data fusion and augmented reality. Chapter 2 also discusses measurement uncertainties, uncertainty propagation, and the extended uncertainty of the measurement system. Chapter 3 focuses on the project's objective: to analyze the measurement uncertainties specific to the C-Track 780 measurement equipment and design artifacts to measure Euclidean distance between two points, squareness, the parallelism between two planes, perpendicularity, and tolerance. The proposed methodology uses statistical distributions to parameterize measurement functions and compares the results with tolerance constraints. The results show that computer-assisted 3D metrology is a powerful tool for reducing assembly errors in the industry. Chapter 4 deals with the validation and analysis of results. It compares confidence intervals to assess measurement accuracy, using the Absolute Arm Hexagon/Romer as the reference system. Comparing confidence intervals and analyzing the repeatability and reproducibility of the measuring instruments allows us to conclude that the measurement system is accurate. The results are then compared to the tolerances required by the wooden building manufacturer, and the accuracy of the measurements is confirmed for all the calculated functions examined.
| Date | 13 Jun 2023 |
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| Original language | French |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | Antoine Tahan (Supervisor) |
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Bou Gebrayel, J. (Author),
Tahan (Supervisor),
13 Jun 2023Student thesis: Master's thesis › Master in Engineering: Mechanical Engineering