Abstract and keywords
Abstract (English):
A procedure is considered for technological support of reliability parameters required in sub-assemblies taking into account the analysis of parameter accuracy changes in operation dimensions at operation stages. There are presented recommendations on updating tolerances and size limit deviations in contact surfaces of parts in assembly units taking into account their formation at machining stages.

Keywords:
dimension analysis, surface quality, technological support of operation properties, assembly units
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References

1. Parts Surfaces Engineering / Authors’ group; under the editorship of A.G. Suslov. – M.: Mechanical Engineering. 2008. – pp. 320.

2. Polsky, E.A., Filkin, D.M. Quality technological support in assembly units based on dimension ties analysis taking into account operation / Science Intensive Technologies in Mechan-ical Engineering. – 2014. – No.11 (41). – pp. 36-44.

3. Suslov, A.G., Fedonin, O.N., Polsky, E.A. High tech-nology for quality increase in assembly units of machinery at life stages // Science Intensive Technologies in Mechanical Engineering. – 2016. – No.5 (59). – pp. 34-42.

4. Polsky, E.A. Technological support of accuracy and quality of machinery at designing routing-operation technolo-gical process by method of synthesis based on dimension ties analysis // Science Intensive Technologies in Mechanical En-gineering. – 2016. – No.10 (64). - pp. 39-48.