OBRABOTKAMETALLOV Vol. 23 No. 4 2021 77 EQUIPMENT. INSTRUMENTS References 1. Ke Y., Fan S., ZhuW., Li A., Liu F., Shi X. Feature-based reverse modeling strategies. Computer-Aided Design , 2006, vol. 38, iss. 5, pp. 485–506. DOI: 10.1016/j.cad.2005.12.002. 2. Jeyapoovan T., Murugan M. Surface roughness classification using image processing. Measurement , 2013, vol. 46 (7), pp. 2065–2072. DOI: 10.1016/j.measurement.2013.03.014. 3. Lushnikov N., Lushnikov P. Methods of assessment of accuracy of road surface roughness measurement with profilometer. Transportation Research Procedia , 2017, vol. 20, pp. 425–429. DOI: 10.1016/j.trpro.2017.01.069. Investigation of complex surfaces of propellers of vehicles by a mechatronic profilograph Sergey Vasiliev a, * , Viktor Alekseev b , Alyona Fedorova c , Dmitry Lobanov d I. N. Ulianov Chuvash State University, 15 Moskovsky Prospect, Cheboksary, 428015, Russian Federation a https://orcid.org/0000-0003-3346-7347, vsa_21@mail.ru, b https://orcid.org/0000-0002-2780-1727, av77@list.ru, c https://orcid.org/0000-0002-0257-9197, e_a_a@mail.ru, d https://orcid.org/0000-0002-4273-5107, lobanovdv@list.ru Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science. 2021 vol. 23 no. 4 pp. 65–78 ISSN: 1994-6309 (print) / 2541-819X (online) DOI: 10.17212/1994-6309-2021-23.4-65-78 Obrabotka metallov - Metal Working and Material Science Journal homepage: http://journals.nstu.ru/obrabotka_metallov ARTICLE INFO Article history : Received: 09 September 2021 Revised: 02 October 2021 Accepted: 16 October 2021 Available online: 15 December 2021 Keywords : Mechatronic profilograph Complex surfaces Reverse engineering Propellers Vehicles Funding The results were obtained under the grant of the President of the Russian Federation for state support of young Russian scientists MD-1198.2020.8, agreement No. 075-15-2020-228 Acknowledgements Research were conducted at core facility “Structure, mechanical and physical properties of materials”. ABSTRACT Introduction. The technology of investigation of screw propellers complex surfaces, which include the marine and aircraft propellers of vehicles, mechatronic profilers for the implementation of reverse engineering, is considered. A review of the scientific literature shows that at present the problem of monitoring complex surfaces of products at various stages of its life cycle requires further research, since the use of available devices and methods does not always provide the necessary accuracy, technological effectiveness and sufficient information on measurements. The purpose of the workis to develop a new technology for studying complex surfaces of propellers, which include marine and aircraft propellers of vehicles by means of a mechatronic profilograph to implement reverse engineering. Methods. The paper considers the implementation of the innovative technology for studying complex surfaces of propellers using the developed mechatronic profilograph. This ingenious mechatronic profilograph is designed to measure the profile and study the shape of complex surfaces of various products, as well as to determine the geometric and morphological parameters of these surfaces. On the basis of theoretical studies the main design and technological parameters are found and the hyperbolic dependence of the angular rate of the laser sensor movement on the scanning radius is determined for the developed mechatronic profilograph. For example, if a constant pitch of the trajectory along the Archimedes spiral is 2 mm, the value of the sensor angular rate should gradually decrease from the maximum value of 2 rad/s to the minimum value of 0.574 rad/s, i.e. by 3.484 times. Results and discussion. It is revealed that the use of cylindrical coordinates for processing the obtained data by a profilograph is logical and has a number of advantages. An express analysis of the propeller surfaces with rotary symmetry is carried out and differences in the shapes of the surfaces of the propeller blades by deviation values in the longitudinal and transverse directions for different radii are established. On the basis of the experimental data, a two-factor power model describing deviations with a determination coefficient of 0.967 is obtained, according to its analysis, it is clear that on average the angle of deviation in the perpendicular direction to the radius δ – increases from 0 to 0.3 , and the angle of deviation along the radius γ increases from 0 to 5.4 . For citation: Vasiliev S.A., Alekseev V.V., Fedorova A.A., Lobanov D.V. Investigation of complex surfaces of propellers of vehicles by a mechatronic profilograph. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) = Metal Working and Material Science , 2021, vol. 23, no. 4, pp. 65–78. DOI: 10.17212/1994-6309-2021-23.4-65-78. (In Russian). ______ * Corresponding author Vasiliev Sergey A. , D.Sc. (Engineering), Associate Professor, I. N. Ulianov Chuvash State University, 15 Moskovsky Prospect, 428015, Cheboksary, Russia Tel.: +7-927-843-22-90, e-mail: vsa_21@mail.ru
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