Impact of local technological concentrators of stresses upon operation properties of parts worked

Sergey Nikitin; Vladimir Makarov; Mihail Pesin; Alexander Gorbunov

doi:doi:10.12737/article_591947e238a398.97451989

UDC 62

Impact of local technological concentrators of stresses upon operation properties of parts worked

Published в Science intensive technologies in mechanical engineering · Volume 2017, Issue 5, 2017 · Pages 31–37 · Rubrics: FUNCTION-ORIENTED AND MODULAR TECHNOLOGIES (archived)

DOI 10.12737/article_591947e238a398.97451989

Received: 10.05.2017 Accepted: 15.05.2017 Published: 15.05.2017 Language of publication: RUS

Authors

Sergey Nikitin ¹ · Vladimir Makarov ² iD · Mihail Pesin ³ · Alexander Gorbunov ⁴

1 Perm National Research Polytechnic University (kafedra SPMiTM, docent)

2 Perm National Research Polytechnic University (Department of Innovative Engineering Technologies, Professor, Holder of the chair ad interim)
Perm, Perm, Russian Federation

3 Perm National Research Polytechnic University (Professor, Dean of the Faculty of Mechanics and Technology)
Perm, Perm, Russian Federation

4 Perm National Research Polytechnic University (kafedra ITM, aspirant)
Perm', Perm, Russian Federation

ABSTRACT

It is defined that during the machining of complex surfaces in parts operating under large fluctuating loads, in critical transition areas of profile conjugate surfaces there are formed local technological concentrators of stresses contributing to formation, development of fatigue cracks and to further destruction of parts in the course of operation. Such phenomena are discovered, for instance, at high-loaded gear teeth machining, at turbine blade profile surface machining, at manufacturing large-modular tapered threads and other parts having complex profile surfaces. There are developed and introduced methods for value decrease of such stress concentrators on the basis of the application of different methods for local surface plastic deformation of a surface layer in transition areas of profiles. As a result the probability of fatigue crack formation decreased considerably and fatigue strength in parts machined increased essentially.

KEYWORDS

stress technological concentrators profile surface local transition areas fatigue strength thread; gears turbine blades.

Information Text References

Authors:

1. Perm National Research Polytechnic University (kafedra SPMiTM, docent)

2. Perm National Research Polytechnic University (Department of Innovative Engineering Technologies, Professor, Holder of the chair ad interim)

Perm, Perm, Russian Federation

3. Perm National Research Polytechnic University (Professor, Dean of the Faculty of Mechanics and Technology)

Perm, Perm, Russian Federation

4. Perm National Research Polytechnic University (kafedra ITM, aspirant)

Perm', Perm, Russian Federation

Type:

Article

Pages:

from 31 to 37

Status:

Published

Subject area:

UDC 62

Language:

Russian, English

Keywords:

stress technological concentrators, profile surface, local transition areas, fatigue strength, thread; gears, turbine blades.

Text

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References

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8. Makarov, V.F., Nikitin, S.P. Influence of shaping conditions upon blade surface quality at deep profile grinding // Science Intensive Technologies in Mechanical Engineering. - 2015. - №8 (50). - pp. 38-44.

Impact of local technological concentrators of stresses upon operation properties of parts worked

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