ASSESSMENT OF CYLINDER LINERS USING COMPUTER VISION AND NUMERICAL THERMAL ANALYSES |
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| Pinar Demircioglu, Ismail Bogrekci, Yunus Cerci, Coskun Deniz, Gokcen Bas, Numan M. Durakbasa |
- Abstract:
- Honing is required when the surface structure parameters of cylinder liners are varied critically. Wear and tear signs occur when cylinder liners of both 4-stroke, and 2-stroke engines are used extensively. Wear and tear is not evenly distributed. Most wears occur between the reversal points of the upper and lower piston rings. Scuffing marks are generally found where the upper piston ring changes its direction. When honing time approaches for most cylinder liners, oval shape of cylinder liners appears. In this study, images of cylinder liners with different surface topography were taken using 3D digital microscope with high resolution and different magnification factors. The sampled images were pre-processed using high pass filters in order to enhance images to catch high frequency components. Edges and patterns of enhanced images then were analyzed using X-Y Sobel algorithm. Then the results obtained from these image analyses studies were compared to have a better understanding about the relationship between temperature distribution contours and patterns on cylinder liners. The solid models of cylinder liners were drawn using Autodesk Inventor and imported to ANSYS Design modeler. The mesh model of the cylinder liner was achieved using CFX-meshing. With approximated boundary conditions, heat fluxes and temperature distribution were computed using numerical thermal analysis in ANSYS. The thermal analyses results indicated that the temperature of the inner surface of the cylinder liners increased about two times when the heat flux rates ranged from 100 to 500 kW/m². Edge and pattern determination results showed that scuffing marks and scratches and their morphological properties from the images of the cylinder liners could be identified using image processing and analyses techniques developed in this study.
- Keywords:
- computer vision, manufacturing techniques, roughness measurement, wavelet transform
- Download:
- IMEKO-TC14-2013-39.pdf
- DOI:
- -
- Event details
- IMEKO TC:
- TC14
- Event name:
- TC14 ISMQC 2013
- Title:
11th International Symposium on Measurement and Quality Control
- Place:
- Cracow and Kielce, POLAND
- Time:
- 11 September 2013 - 13 September 2013