The browser you are using is not supported by this website. All versions of Internet Explorer are no longer supported, either by us or Microsoft (read more here: https://www.microsoft.com/en-us/microsoft-365/windows/end-of-ie-support).

Please use a modern browser to fully experience our website, such as the newest versions of Edge, Chrome, Firefox or Safari etc.

Jan-Eric Ståhl

Jan-Eric Ståhl

Professor

Jan-Eric Ståhl

Tool–chip thermal conductance coefficient and heat flux in machining : Theory, model and experiment

Author

  • V. Kryzhanivskyy
  • R. M’ Saoubi
  • J. E. Ståhl
  • V. Bushlya

Summary, in English

This study proposes a technique for determining a tool–chip thermal conductance coefficient and heat flux in machining. The technique is based on solving an inverse heat transfer problem (IHTP). Because the IHTP is ill-posed, a priori information is required for its effective solution. To derive this information, substantial qualitative and quantitative analysis of a mixed boundary value problem for the heat equation and an illustrative test case for IHTP are provided. It has been established that the averaged interfacial chip temperature is needed for an effective IHTP solution. Thermal imaging combined with a special experimental setup was used to determine chip temperature. It was also found that a function describing the heat flux time dependency belongs to a set of decreasing functions. Tool–chip thermal conductance coefficients were obtained for high-speed steel and cemented carbide tooling. On the microscale, this data was interpreted in terms of a conforming rough surface contact conductance model, where tool wear was found to govern variations in the thermal conductance coefficient.

Department/s

  • Production and Materials Engineering
  • SPI: Sustainable Production Initiative

Publishing year

2019-12-01

Language

English

Publication/Series

International Journal of Machine Tools and Manufacture

Volume

147

Document type

Journal article

Publisher

Elsevier

Topic

  • Materials Engineering

Keywords

  • Heat flux
  • Inverse method
  • Machining
  • Tool–chip thermal conductance coefficient

Status

Published

ISBN/ISSN/Other

  • ISSN: 0890-6955