Online vision-based inspection system for thermoplastic hot plate welding in window frame manufacturing

Martinez Rodriguez, Pablo, Al-Hussein, Mohamed and Ahmad, Rafiq (2020) Online vision-based inspection system for thermoplastic hot plate welding in window frame manufacturing. Procedia CIRP, 93. pp. 1316-1321. ISSN 2212-8271

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Current manual quality control processes in continuous production environments are limited in impact and reliability. An online automatic inspection system is proposed to generate quality-oriented information regarding the welding of frames in window manufacturing. Using novel edge detection techniques and the Hough transform, a novel algorithm is presented to accurately estimate in real-time welding angles and the overall squareness of the window frame. The inspection system presented is integrated in an automated four-point welding machine and provides decision support to quality control operators regarding the conformity of welded frames. The system is validated in a real scenario and the proposed algorithm estimates welding angles and overall frame squareness with an accuracy of 98.38%, indicating an average error less than 0.8 degrees.

Item Type: Article
Additional Information: Funding information: The authors gratefully acknowledge the financial support of the Natural Sciences and Engineering Research Council of Canada (File No. IRCPJ 419145-15).
Uncontrolled Keywords: inspection system, machine vision, thermoplastic welding, hot plate welding, window manufacturing
Subjects: H300 Mechanical Engineering
Department: Faculties > Engineering and Environment > Mechanical and Construction Engineering
Depositing User: Rachel Branson
Date Deposited: 14 Feb 2022 15:40
Last Modified: 14 Feb 2022 15:45

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