Engineering Ceramic Grinding Force Signal

The grinding is one of the primary methods in machining ceramics, so the investigations of grinding force signal have become a crucial subject in machining fields. Based on a series of grinding experiments about Si4 and Al2O3, some rules of grinding force signal are investigated by utilizing the multidisciplinary knowledge in cutting machining, materials, computer, digital signal processing, time series analysis and statistics. These investigations are in the paper as follows:The software about digital signal processing is programmed to analysis grinding force signal efficiently and accurately in view of a large amount of experimental data in grinding ceramics.The characteristics of grinding force signal about SisN4 and Al2O3 verified by means of the theories and methods of DSP and Statistics are calm, periodic and vibrated.The rules of grinding force, stock removal rate studied by changing grinding parameters in grinding SisN4 and Al2O3 are that the influences of grinding depth are more than those of wheel grinding speed and oscillation speed on grinding process, and that the chip removal is finished through the plastic deformation under smaller depth of grinding, but the cracking plays a great role under larger depth of grinding.The results of this study about the influence of machine stiffness and grinding pass on grinding process in grinding SisN4 and AlAl2O3 demonstrate that a machine of lower stiffness results in smaller grinding force, a lower stock removal, and wheel ADOC in contrast to a higher stiffness machine. On the other hand, the results on multi-pass grinding indicate that the influences of machine stiffness diminish as the number of grinding passes increases.The influences of wheel specifications on grinding force signal are investigated primarily through selecting different wheels, and the correlation is found between wheel vibrated signal and grinding force signal in grinding Si3N4...