Aplikace optických metod při měření tvarově složitých součástí

Abstract

ZELINKA, Jan. The application of optical methods in the measurement of complex-shaped components. Ostrava, 2024, Dissertation’s Thesis. Department of Machining, Assembly and Engineering Metrology, Faculty of Mechanical Engineering, VSB – Technical university of Ostrava. 107 pages, 62 figures, 10 tables, 2 supplements. Tutor: prof. Ing. Robert Čep, Ph.D.

The submitted dissertation thesis deals with the application of optical methods for evaluating gears for practical use at Škoda Auto a.s. For measurement, a spur gear (satellite) in the differential was selected, which is found in almost every combustion engine car. The differential can be located on either the driven axle or the driving axle, depending on the specific vehicle layout. The main objective of the dissertation thesis was to develop a methodology for measuring complex-shaped components, such as gear flanks, using various optical measurement systems. Throughout the research, specific sub-goals were achieved, providing a comprehensive and advanced introduction to the measurement of gears, including an analysis of the current state. Furthermore, a methodology for evaluating gears was described, based on contact measurement methods, and during the research, it was applied to evaluate gear parameters using optical methods. The methodology required the adjustment of the coordinate system of the measured gear. Another sub-goal focused on adjusting measurement parameters to the resulting quality of the captured points or images. The selected parameters during capture can significantly affect the measurement quality and evaluation accuracy. Suitable combinations of selected key factors (Fp, fp, fu, Frsn, Fr) that influence the measurement results of gears were chosen for experimental testing using several professional devices. The initial device chosen was the Zeiss Prismo 7 Coordinate Measuring Machine (CMM). The research also utilized the Comet optical device based on stripe projection, and the Shapetracer II line laser scanner. Lastly, the Alicona G5 optical microscope, based on the Focus Variation principle, was used. Another sub-goal was to experimentally verify the proposed procedure for measuring the component using optical methods. The research results were statistically processed and graphically represented. Finally, the obtained results and benefits were interpreted. The results will be applicable in practice and further developed and published.