Publication detail

Hodnocení jakosti povrchu kroužků valivých ložisek

PERNIKÁŘ, J. MUSIL, M.

Original Title

Hodnocení jakosti povrchu kroužků valivých ložisek

English Title

Quality Surface Evaluation of Circle Rolling Bearings

Type

journal article - other

Language

Czech

Original Abstract

Kvantifikování parametru drsnosti povrchu funkčních ploch z opakovaných měření na dané poše. Jedná se o vypočtení tzv reprezentativní hodnoty, která s dostatečnou pravděpodobnstí odpovídá horní statistické mezi, nad kterou se nachází 16 % všech hodnot.

English abstract

The quality of a functional areas defined by parameters of functional areas by its transferring has a rules which are defined in the standard ČSN EN ISO 4288:1999. The rules which are defined in this standard are used only for parameters calculated from the roughness profile. The article deals with procedures for the rule "16%", which is in The Standard defined for theoretical case of infite number of result measuring realized on defined surface by repeating conditions. According to this rule is possible to internalise controlled area as a satosfactoried in the event that more than 16% of all measured values are bigger than the prescribed value (in case of the biggest available value). A practical application of this rule is not possible. Authors of this article deal with methods of determination of the „representative value" controlled surface roughness parameter by statistical evaluation of a limited number of values with sufficient credibility. Based on big number of measurements of roughness parameters, especially average arithmetic deviation of under review profile of Ra, estimate of representative values was evaluated basically by two methods. Result of statistic analysis showed that reliable representative values are carried of minimal number of fifty readings. By this numbers of data are results both of methods identical. This number is too big and before this is unreal for typical control. Aplication is useful for example for reliable evaluation of possibillity single technologies. For practical acceptance of surface quality is important a convention between distributor and purchaser on control conditions.

Key words in English

surface structure, rule of maximum, rule 16%, middle value, standard deviation, statistic tolerant margin

Authors

PERNIKÁŘ, J.; MUSIL, M.

RIV year

2011

Released

25. 10. 2011

Publisher

Univerzita J.E. Purkyně FVTM Hoření 13 400 96 Ústí nad Labem

Location

Ústí nad Labem

ISBN

1211-4162

Periodical

Strojírenská technologie

Year of study

XVI

Number

5

State

Czech Republic

Pages from

29

Pages to

32

Pages count

4

BibTex

@article{BUT88816,
  author="Jiří {Pernikář} and Martin {Musil}",
  title="Hodnocení jakosti povrchu kroužků valivých ložisek",
  journal="Strojírenská technologie",
  year="2011",
  volume="XVI",
  number="5",
  pages="29--32",
  issn="1211-4162"
}