Istrazivanja i projektovanja za privreduJournal of Applied Engineering Science

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


DOI: 10.5937/jaes15-14232
This is an open access article distributed under the CC BY-NC-ND 4.0 terms and conditions. 
Creative Commons License

Volume 15 article 480 pages: 505 - 508

Vyacheslav Porokhin
Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, Saint Petersburg, Russia

Yuri Karakulev
Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, Saint Petersburg, Russia

Ramil Minnigazimov
Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, Saint Petersburg, Russia

Sergey Mednikov
Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, Saint Petersburg, Russia

Anvar Zakirov
 Saint Petersburg National Research University of Information Technologies, Mechanics and Optics, Saint Petersburg, Russia

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.

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