Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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A study on the Cutting Force Variation Comparison between Low CBN and Coated Low CBN Tools in Turning of SCM440

Low CBN 코팅공구의 SCM440 선삭시 절삭력변화에 관한 연구

  • Bang, Hong-In (Production Automatic Operation Department of Iksan Campus Korea Polytechnic) ;
  • Kim, Tea-Young (Mechanical System Engineering Department of Chonbuk National University) ;
  • Oh, Sung-Hoon (Mechanical System Engineering Department of Chonbuk National University)
  • Published : 2013.02.28
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Abstract

In recent years, high hardness steel is used for most of the material in many areas including aircraft, nuclear power, space exploration and automotive parts. Low CBN tools are widely used in industrial field which can effectively process high hardness steel of HRC 45 or harder. The results of this study demonstrated, when high hardness steel, SCM440 is turned with Low CBN tools coated with TiN and TiAlN coatings respectively, that both the thrust force and cutting force tends to increase with more increase in cutting force than thrust force, as the feed rate increases at constant cutting speed. In addition, the size of the cutting force and thrust force does not change with the increased cutting speed at the same feed rate, but the tool life is reduced if the cutting speed is increased to shorten the machining time. Therefore, it is recommended to limit the cutting speed at 250 m/min maximum or less. Furthermore, comparing the cutting force of the three tools at the same cutting condition, Tin coating tool showed the smallest cutting force and Low CBN was the next, and the TiAlN coating tools showed the largest cutting force.

Keywords

References

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