Publication detail

MACHINING OF HARDENED BEARING STEELS

OSIČKA, K. KALIVODA, M. CHLADIL, J. MOURALOVÁ, K. OTOUPALÍK, J.

Original Title

MACHINING OF HARDENED BEARING STEELS

Type

journal article - other

Language

English

Original Abstract

The paper deals with the issues of machining by finishing turning of hardened materials in the production of bearing rings. In this area, grinding is mainly used as standard technology. It is a demanding production process requiring precision machinery and optimally set technology. Under these conditions, the mass-production can offer components with prescribed degrees of accuracy in the tolerance level from IT 4 to IT 5 and with the arithmetical mean deviation of the profile in the range between Ra = 0.4 and Ra = 0.8. For these conditions, there has been a long search for alternative technology that would ensure the same required values with simpler demands on manufacturing process. One of the developmental paths was focused on turning with the use of advanced cutting materials for machine tools. It is primarily the use of cubic boron nitride (CBN). A cheaper and more affordable option is also the application of cemented carbide of group H. This carbide is intended primarily for finishing machining of the materials difficult to machine. Regarding the tool geometry, either the classic variant with radius edge or the Wiper variant can be used. On the world market, reputable companies offer these materials in the form of replaceable inserts; nevertheless their application for machining of e.g. hardened materials also depends on other decisive factors. Basically, this is a system of machine-tool-workpiece where its stability is of particular importance; in other words the rigidity of clamping. As shown in performed and evaluated practical experiments, it is not easy to determine the initial conditions. The experience gained from this area is the subject of this article.

Keywords

hardened material, bearing ring, machining, turning, replaceable insert, cutting speed, feed

Authors

OSIČKA, K.; KALIVODA, M.; CHLADIL, J.; MOURALOVÁ, K.; OTOUPALÍK, J.

RIV year

2013

Released

14. 11. 2013

Publisher

University “Politehnica of Bucharest"

Location

Bucharest

ISBN

2067-9238

Periodical

Journal PROCEEDINGS IN MANUFACTURING SYSTEMS

Year of study

8

Number

3

State

Romania

Pages from

171

Pages to

176

Pages count

6

BibTex

@article{BUT100906,
  author="Karel {Osička} and Milan {Kalivoda} and Josef {Chladil} and Kateřina {Mouralová} and Jan {Otoupalík}",
  title="MACHINING OF HARDENED BEARING STEELS",
  journal="Journal PROCEEDINGS IN MANUFACTURING SYSTEMS",
  year="2013",
  volume="8",
  number="3",
  pages="171--176",
  issn="2067-9238"
}