A visual inspection system for KTL coatings

Bračun, Drago (author), Lekše, Igor (author)

Many metal components in automotive industry are surface-protected using the electrophoretic cathode metal coating (KTL). As surface defects can occur in this process, the components need to be 100% inspected, especially if the manufacturers are committed to delivering zero-defect products. Due to complicated 3D curved shapes and black shiny colour of the coating, inspection is typically carried out manually. To avoid labour-intensive manual inspection in serial production, an automated visual inspection system is developed. The paper presents the implementation of a control device for mass inspection of the products, typical KLT coating defects, and the visual inspection method for the detection of coating defects. A difference image acquisition method is implemented in order to reveal the defects on the black shiny colored parts. An image processing algorithm for the recognition of light patterns and a clustering approach for the recognition of defects are presented.

• Language: English
• Keywords: KTL, surface defect, inspection, imaging system, pattern recognition, cluster
• Work type: Article
• Typology: 1.08 - Published Scientific Conference Contribution
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2019
• Number of pages: f. 771-774
• Numbering: Vol. 81
• PID: 20.500.12556/RUL-108466
• UDC: 658.56:620.191(045)
• ISSN on article: 2212-8271
• DOI: 10.1016/j.procir.2019.03.192
• COBISS.SI-ID: 16688411
• Publication date in RUL: 03.07.2019

Record is a part of a proceedings

• Title: 52nd CIRP Conference on Manufacturing Systems (CMS), Ljubljana, Slovenia, June 12-14, 2019
• COBISS.SI-ID: 16674843

Record is a part of a journal

• Title: Procedia CIRP
• Publisher: Elsevier
• ISSN: 2212-8271
• COBISS.SI-ID: 12981019

Secondary language

• Language: Slovenian
• Keywords: površinske napake, nadzor kakovosti, slikovni sistemi, razpoznavanje vzorcev

Projects

• Funder: ARRS - Slovenian Research Agency
• Project number: P2-0270
• Name: Proizvodni sistemi, laserske tehnologije in spajanje materialov