STATIC MODELING OF THE DIMENSIONAL CHAINS OF THE HOLE CENTER-FINDERS

Vyacheslav Porokhin; Yuri Karakulev; Ramil Minnigazimov; Sergey Mednikov; Anvar Zakirov

doi:10.5937/jaes15-14232

Vyacheslav Porokhin Saint Petersburg National Research University of Information Technologies, Mechanics and Optics
Yuri Karakulev Saint Petersburg National Research University of Information Technologies, Mechanics and Optics
Ramil Minnigazimov Saint Petersburg National Research University of Information Technologies, Mechanics and Optics
Sergey Mednikov Saint Petersburg National Research University of Information Technologies, Mechanics and Optics
Anvar Zakirov Saint Petersburg National Research University of Information Technologies, Mechanics and Optics

DOI: https://doi.org/10.5937/jaes15-14232

Keywords: tolerant, methodology, estimation, accuracy,

Abstract

The article is devoted to estimate the center-finders accuracy for holes of large-sized case details. Methodology for analyzing center-finders accuracy using dimensional chains and computational mathematics is proposed. It is shown that the quality classes calculated for a direct task can be extended. The methodology is applied to estimate the accuracy of center-finders with typical construction using the example of the specified tolerances for the deviation from alignment in the turbine K-300-240 and the diesel engine 10D100. As a result of calculating the dimensional chain for a direct task, the following values are obtained: 5 quality class for the first case, and 6 for the second case. To check for the inverse task, a computer program that calculates the closing link by the Monte Carlo method with Gaussian distribution is written. Based on the mutual influence of the center-finder supports, tolerances can be extended to 6 and 7 respectively, without accuracy loss.

References

GOST 2.308 – 2011. Ukazaniya dopuskov formy i raspolozheniya poverhnostej [State standart 2.308 – 2011. Indications of the tolerances of the shape and arrangement of surfaces] Moscow: Standartinform Publ., 2012. 25 p.

Tabakov S.V., Postovalova A.A.. Inzhenernaya geodeziya [Engineering geodesy]. Khabarovsk, Publishing house of the FESTU, 2009. 510 p.

RD 50-635-87. Metodicheskie ukazaniya. Cepi razmernye. Osnovnye ponyatiya. Metody rascheta linejnyh i uglovyh cepej [Methodical instructions. Chains are dimensional. Basic concepts. Methods for calculating linear and angular chains]. Moscow, Publishing Standards, 1987. 44 p.

Putyato A.V., Kovalenko A.V. Raschet razmernyh cepej [Calculation of dimensional chains]. Gomel, BelGUT Publ, 2008.-32 p.

Mikhailov G.A.,. Voitishchev A.V. Chislennoe staticheskoe modelirovanie. Metody Monte-Karlo [Numerical static modeling. Monte Carlo methods]. Moscow, Publishing Center "Academy", 2006. 368 p.

Valetov V.A., Murashko V.A. Osnovy tekhnologii priborostroeniya [Fundamentals of Instrument Technology] St. Petersburg, SPbNRU ITMO, 2006 - 180 p.

Gavrilov A.V., Klimenkov S.V., Tsopa E.A. Programmirovanie na Java [Programming in Java]: Lecture notes SPb, SPbNRU ITMO, 2010. 130 p.

Palei M.A., Romanov A.B., Braginsky V.A. and others. Dopuski i posadki [Tolerances and fits] SPb, Politechnica Publ, 2001. 608 p.

Altuhov V. YA. Mekhanizaciya i avtomatizaciya tekhnicheskogo obsluzhivaniya i remonta podvizhnogo sostava [Mechanization and automation of maintenance and repair of rolling stock] Moscow, Transport Publ, 1989. 199 p.

STO 70238424.27.040.009-2009. Turbina parovaya K-300-240-1 LMZ. Tekhnicheskie usloviya na kapital'nyj remont. Normy i trebovaniya [Steam turbine K-300-240-1 LMZ. Technical conditions for overhaul. Norms and requirements]. Moscow, 2009. 268 p.