Thermal effects of ultrasonically excited grinding fluid
72 In this study, to reveal reason of improvements by ultrasonic excited fluid , the amount of grinding fluid is measured. The amount is increased by the ultrasonic vibrations in case of fluid supply is small and the grinding wheel speed is higher. Moreover, the temperature at the grinding point is measured by constructing a thermocouple, it was confirmed that the grinding heat is reduced by using the ultrasonic excited fluid. And the effect of removing a grinding heat is due to the effect of the grinding fluid volume increased to grinding point. And, longer chip obtained with ultrasonic excited fluid compared with ordinary fluid. It shows suppression of wear of the abrasive grains with ultrasonic excited fluid Normal 0 0 2 false false false EN-US JA TA 72 In this study, to reveal reason of improvements by ultrasonic excited fluid , the amount of grinding fluid is measured. The amount is increased by the ultrasonic vibrations in case of fluid supply is small and the grinding wheel speed is higher. Moreover, the temperature at the grinding point is measured by constructing a thermocouple, it was confirmed that the grinding heat is reduced by using the ultrasonic excited fluid. And the effect of removing a grinding heat is due to the effect of the grinding fluid volume increased to grinding point. And, longer chip obtained with ultrasonic excited fluid compared with ordinary fluid. It shows suppression of wear of the abrasive grains with ultrasonic excited fluid Normal 0 0 2 false false false EN-US JA TA
Experimental Verification of Effect of Grinding Fluid Excited by Ultrasonic Vibration
The grinding performance is strongly affected by grain condition. Especially loading directly raises the grinding force, reduces tool life and deteriorates accuracy of machining. In this study, ultrasonic exciter which applies vibration energy on grinding fluid was developed. The resonant frequency of 28kHz. The exciter is set between the fluid supplying nozzle and grinding wheel. The discharging grinding fluid from the nozzle is supplied to grinding wheel between the teeth of comb-shape horn. The performance is verified on surface grinding machine with vitrified WA grinding wheel. It was experimentally demonstrated that the excited grinding fluid prevented the loading and improved the surface roughness even for grinding of aluminum. And also improvement of surface roughness was recognized on alloy tool steel.
Effects of Cutting Edge Truncation on Ultrasonically Assisted Grinding
Dies for injection molded parts require high-quality surface finishes in terms of both appearance and integrity. Manual finishing by skilled workers is required to produce such surfaces, but this takes several days. To minimize the amount of polishing required, a new finishing technique that employs ultrasonically assisted diamond grinding was proposed in a previous report. Cutting edge truncation prior to grinding is required to produce a mirror surface. In this study, the effect of cutting edge truncation was investigated and the relationships between the ground surface roughness and the cutting torque and the thrust force were considered to optimize the grinding conditions for mirror surface finishing.