Analysis of the application of the minimum quantity lubricant - MQL technique in the grinding process

摘要

An analysis of the experimental data of this study involving the plunge cylindrical grinding of tempered ABNT 4340 steel allowed us to conclude that: The analyses of the various results indicated that the MQL technique can be applied efficiently in the grinding process, providing environmentally friendly and technologically relevant gains. The R_a and diametral wear values were considerably reduced with the use of the MQL technique, displaying excellent properties of lubricity. The MQL technique allowed for a reasonable reduction of the tangential cutting force and the specific energy in comparison to the conventional cooling condition. The tangential cutting force decreased with the use of MQL, possibly due to the presence of lubricant around the grinding wheel, providing better slipping of the grain at the piece-tool interface. No significant clogging of the grinding wheel pores was found with the MQL technique. The application of cutting fluid with MQL allowed the cutting edges of the grinding wheel to remain sharp for longer periods before they were renewed. The results allowed us to demonstrate that the method and quantity of lubricant and cooling are factors that affect the grinding process.