スナッギング研削特性に及ぼす砥石種類の影響 (第2報)

ステンレス鋼, 軸受鋼研削の場合

抄録

Conditioning of steel is an indispensable process to obtain high quality steel products. Snagging has recently attracted much attention as the more advantageous conditioning method from stand-points of energy-saving and air pollution compared to other methods, such as oxygen scarfing or mechanical chipping. An important problem in snagging is the selection of proper wheel type, but correct selec-tion is hampered by the lack of exact information. In our previous work, a laboratory snagging test under constant load was made on an S 55 C steel, using different wheel types. In the present study, the same snagging test was carried out on SUS 304, SUS 430 and SUJ 2 steels using seven different wheel types. This experimental work allowed the metal removal rate, the wheel wear rate and G-ratio to be determined. It was found that the 32 A wheel was the best from a stand-point of removal rate, while from stand-points of wheel wear or G-ratio the ZS and ZN wheel types were superior to the alumina wheel types. In special, the ZN wheel showed the higher G-ratio over the ZS wheel for the grinding of SUS 304 steel. Also, it is noted that the geometry of the surface generated depends largely on wheel type, and then, a great difference in the geometry is seen even between the ZS and ZN wheel types.