Design of fully automatic calibration machine for reference block based on machine vision

In order to solve the problems of the existing standard Brinell hardness machine such as low automation, the time-consuming indentation measurement and the human influence in indentation measurement, a calibration machine for reference block was designed. It shows that this machine can reduce the influence of the temperature difference between the hardness block and the measurement platform; it eliminates the time for the indentation measuring system to find the indentation and juxtapose it with the centre of the field of view and implements fully Brinell hardness automatic calibration.

The Influence of Cu Content on the Mechanical Properties of Copper-Borate Glasses

We report on the mechanical properties of xCuO-(50-x)PbO-50B2O3 (x from 0 to 30 mol%) copper-lead-borate glasses. Their mechanical properties were investigated by the mechanical resonance technique and by the indentation measurement. The replacement of lead by copper improves the packing efficiency, and enhances the elastic moduli, hardness and the fracture toughness of glasses.