Title: Estimation of the convection heat transfer coefficient of coolant and prediction of the maximum temperature within the grinding zone

Authors: Bin Lin, Xuewen Chen, Michael N. Morgan, Hui Wu

Addresses: Key Laboratory for Advanced Ceramics, and Machining Technology of Ministry of Education, Tianjin University, Tianjin, 300072, P.R. China. ' Key Laboratory for Advanced Ceramics, and Machining Technology of Ministry of Education, Tianjin University, Tianjin, 300072, P.R. China. ' Advanced Manufacturing Technology Research Laboratory (AMTReL), General Engineering Research Institute, Liverpool John Moores University, Byrom Street, L3 3AF, Liverpool, UK. ' Advanced Manufacturing Technology Research Laboratory (AMTReL), General Engineering Research Institute, Liverpool John Moores University, Byrom Street, L3 3AF, Liverpool, UK

Abstract: Grinding fluid is used to minimise grinding wheel wear, reduce forces and surface grinding temperatures and to improve process efficiency. The overall effectiveness of the fluid is therefore strongly determined by the ability of the fluid to remove heat from the contact region. This paper presents results of an investigation concerned with methods to determine the value of the convection heat transfer coefficient. The work is based on the theory of fluid dynamics and on analytical models that are used to describe the heat transfers within the grinding zone under different grinding conditions. The simulation research is made by means of FEM for the wet-grinding temperature distribution and a three dimensional topology map of the temperature distribution was obtained. Temperature is measured with the clamped thermocouple in different grinding condition. It was found that results obtained from the simulations correlated well with those from the experiment. The simplicity and accuracy of the methodology allows application to a wide range of grinding regimes from shallow cut through to high efficiency deep grinding.

Keywords: grinding fluids; coolant; convection heat transfer; heat transfer coefficient; temperature prediction; wet grinding; temperature distribution; FEM; finite element method; simulation.

DOI: 10.1504/IJAT.2009.022584

International Journal of Abrasive Technology, 2009 Vol.2 No.2, pp.130 - 153

Received: 22 Nov 2007
Accepted: 23 Jan 2008
Published online: 16 Jan 2009 *

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