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Analytical Calculation of the True Equivalent Chip Thickness for Cutting Tools and its Influence on the Calculated Tool Life

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Author

Summary, in English

A majority of the established systems for determination and optimization of cutting data are based on Woxén’s equivalent chip thickness, heW. In metal cutting theory and models, the equivalent chip thickness is of vital importance when the depth-of-cut ap is in the same order or smaller than the nose radius r. Woxén made considerable simplifications in his chip area model, that form the basis for calculations of the equivalent chip thickness. Basic mathematical solutions, e.g. describing the chip area on circular inserts, are lacking. This article describes the geometrical implications when machining with round inserts. The error in Woxén’s equivalent chip thickness is largest when the depth-of-cut is less than ¼ of the nose radius and are up to 40 % wrong for some combinations of cutting data in the finishing range. The presented results explain the difficulties in getting a good validity in the models used to calculate tool life in finishing machining. The error leads to an underrating of the tool load in many machining situations.

Publishing year

2012

Language

English

Pages

80-86

Publication/Series

Advanced Materials Research

Volume

576

Document type

Journal article

Publisher

Trans Tech Publications

Topic

  • Materials Engineering

Keywords

  • Metal cutting
  • Equivalent chip thickness
  • round inserts

Status

Published

ISBN/ISSN/Other

  • ISSN: 1022-6680