Obrabotka Metallov 2015 No. 4

ОБРАБОТКА МЕТАЛЛОВ № 4 (69) 2015 41 ОБОРУДОВАНИЕ. ИНСТРУМЕНТЫ Abstract The results of research factual accuracy of the shell stabilizing section of the geokhod prototype are presented. The paper contains an overview of a number of approaches to modeling the mechanisms of formation errors of the ring segmented items and determine its factual accuracy. The problem of experimental verification of the assumptions adopted in the simulation is posed. The study is performed on the basis of experimental data obtained by the coordinate measurement of the geokhod prototype. For the analysis of experimental data, the creation of mathematical models, its research, visualization data and reporting special software is developed. Data is analyzed by the method of mathematical simulation of the shell surface of the stabilizing section in whole and each sector. It is shown that, a significant portion of shell section geometric shape deviations (from 30,3 to 52,3 %) is due to errors in the location of sectors and errors of their radii. On the basis of the simulation absolute values of the respective errors and the actual values of dimensions and deviations are determined. The possibility of providing a given accuracy in the implementation of the shell surface assembly technology used in pilot production is confirmed. At the same time, the proximity of the actual values of the deviations to the limit values can lead to problems in ensuring the consistent quality of geokhod bodies in serial production. The correlation analysis of the data and statistical analysis of series of residuals of the developed models are made. Correlation analysis confirms the dependence of the deviations of the experimental points from their cylindrical coordinates, which confirms the importance of the location of the error sectors in deviations from the geometric precision shell. The results of the statistical analysis of series of models of residues shows that the error location and error sectors of their radii are not the only ones, are significant factors in shaping inaccuracies shell stabilizing section. Keywords : large segmented-ring items, assembly, accuracy, geokhod, shell. DOI: 10.17212/1994-6309-2015-4-31-42 References 1. Efremenkov A.B. Forming the subterranean space by means of a new tool (geohod). Proceedings of the 6th International Forum on Strategic Technology IFOST–2011 , Harbin, 22–24 August 2011, pp. 348–350. doi: http:// dx.doi.org/10.1109/IFOST.2011.6021037 2. Aksenov V.V., Beglyakov V.Yu., Kapustin A.N. Analiz nesushchikh konstruktsii (korpusov) izvestnykh tekhnicheskikh sistem primenimykh v kachestve korpusa (nositelya) geokhoda [Analysis of load-bearing structures (buildings) of the prior art systems useful as the body (carrier) of geokhod]. Vestnik Kuzbasskogo gosudarstvennogo tekhnicheskogo universiteta – Bulletin of Kuzbass State Technical University , 2014, iss. 6 (106), pp. 34–36. 3. Kapustin A.N. [Background of design hull shape geohod]. Trudy XVII Mezhdunarodnogo simpoziuma “Problemy geologii i osvoeniya nedr” imeni akademika M.A. Usova studentov i molodykh uchenykh, posvyashchennogo 150-letiyu so dnya rozhdeniya akademika V.A. Obrucheva i 130-letiyu akademika M.A. Usova, osnovatelei Sibirskoi gorno-geologicheskoi shkoly : v 2 t . [Proceedings of the 17th International Scientific Symposium of students, Postgraduates and young Scientists devoted to the 150th Anniversary of Academician V.A. Obruchev and 130th Anniversary of Academician M.A. Usov, Founders of Siberian Mining School: in 2 vol.]. Tomsk, 1–6 April 2013, vol. 2, pp. 320–321. 4. Walter A.V., Aksenov V.V. Varianty obespecheniya tochnosti obolochek i sobiraemosti korpusov geokhoda [Options for the accuracy of shells and housings collection geohod]. Mekhaniki XXI veku – Mechanics of the XXI century , 2015, no. 14, pp. 89–92. 5. Aksenov V.V., Walter A.V., Beglyakov V.Yu. Obespechenie geometricheskoi tochnosti obolochki pri sborke sektsii geokhoda [Ensuring the geometric accuracy of shell during assembly of Geohod sections]. Obrabotka metallov (tekhnologiya, oborudovanie, instrumenty) – Metal Working and Material Science , 2014, no. 4 (65), pp. 19–28. 6. Hussain T., Yang Z., Popov A.A., McWilliam S. Straight-build assembly optimization: a method to minimize stage-by-stage eccentricity error in the assembly of axisymmetric rigid components (two-dimensional case study). Journal of Manufacturing Science and Engineering , 2011, vol. 133, iss. 3, pp. 031014/1–031014/9. doi:10.1115/1.4004202 7. Memon M., Hussain T., Memon Z.A. Minimizing assembly errors by selecting optimum assembly sequence in the assembly of a rigid circular structure. Mehran University Research Journal of Engineering & Technology , 2012, vol. 31, iss. 4, pp. 743–754.