| Summary: | 碩士 === 國立高雄應用科技大學 === 模具工程系 === 105 === In this study, ultrasonic non-destructive testing was used to scan the clutch disc of the gear locomotive to measure the change of contact area of the clutch disc before and after use, which was later discussed and analyzed. In the process, the LabVIEW software was used to control the servomotor mobile ultrasonic sensor and extract the data. The data obtained was transformed into the gradient image of the contact area through MATLAB software, and then the contact area was calculated according to different load and contrast ratio through the PIA.
Calculate the area of clutch disc by PIA, learn that the load force has increased from 20kgw to 80kgw, take the contrast ratio of 100%, and the contact area of new clutch disc is between 1166.76 mm2 to 2313.89 mm2 while the contact area of the used clutch disc is between 547.83 mm2 to 2211.49 mm2. The results indicate that the greater the load, the larger the contact area, and that the contact area of the used clutch disc is smaller than that of the unused clutch disc. Where the contact area of the clutch disc is smaller, the relative degree of wear is greater, and the time of use is longer, thus proving that the contact area is inversely proportional to the degree of use of the clutch disc.
Finally, the 3D graphics entities transformed through the ultrasonic scanning data were printed by the 3D printing machine, and the surface roughness of the clutch disc was measured through the surface roughness tester. By printing the single entity of clutch disc, it is shown that the higher the accuracy of the ultrasonic instrument is, the more accurate the observation of the clutch disc wear. Besides, the contact area data and roughness were made into diagrams using EXCEL to facilitate the comparison between the roughness of the used clutch disc and the unused clutch disc. The experimental results show that the new clutch disc with greater roughness; however, the used clutch disc relatively smaller.
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