Key Engineering Materials Vol. 404

Abstract: Micro drilling experiments of glass by Micro Abrasive Suspension Jets (MASJ) were carried out. The influence of the nozzle and compositions of slurry including the selection of abrasives, suspending agents and their concentrations on material removal, the depth and the diameter of the machined holes were investigated for glass drilling. Four processing stages are provided to describe the erosion profile characteristics. The suspension properties of slurry play an important role in MASJ machining. Five million molecular weight non-ionic polyacrylamide with concentration of 0.6% , white corundum abrasive and the longest length of the nozzle cylindercal zone can achieve lager material removal and better quality of hole in MASJ machining.

Abstract: The background temperatures in the sawing of granite with a diamond wire were measured by foil thermocouple. The influences of the measuring position in the cutting zone, cutting speed, feed rate and coolant on the temperature were investigated. The results indicated that the background temperature would be stable after a short-term rise. It was shown that the background temperature increased with cutting speed, but there was no obvious relationship between the background temperature and feed rate. The maximum background temperature appeared at the front part of the cutting zone at a lower feed rate. With an increase of feed rate, the background temperature at the middle of the cutting zone was the highest. The coolant had an obvious influence on the maximum background temperature.