A VARIABLE HEAT-FLUX MODEL OF HEAT-TRANSFER IN GRINDING - MODEL DEVELOPMENT

In any grinding process, thermal damage is one of the main limitations to accelerating the completion of the product while maintaining high quality. Therefore, the objective of the present study is to understan d the thermal behavior in the grinding process and possibly achieve th e ultimate goal of avoiding thermal damage in the grinding process. A model previously developed is improved to analyze the heat transfer me chanisms in the grinding process. Heat generated at the interface betw een the abrasive grains and workpiece (i.e., the wear flat area) is co nsidered. A conjugate heat transfer problem is then solved to predict the temperature in the grinding zone. In the previous model, all the h eat fluxes were assumed to be uniformly distributed along the grinding zone. This led to a contradiction in the temperature matching conditi on. This reveals that the heat fluxes into each of the various materia ls are not uniform along the grinding zone. An improved model, account ing for the variation of the heat fluxes along the grinding zone, is p resented. The temperature and heat flux distributions along the grindi ng zone are presented, along with comparisons to previous theoretical results.