Influence of Wheel Type on Snagging Characteristic

The study of snagging is the major research subject in the recent abrasive engineering. In our previous research the laboratory snagging experiment of constant load and traverse grinding type was made on S 55 C and SK 3 steels, using the regular alumina and ZS-zirconia wheels. In the present study the same snagging test was carried out for six different grain wheels, using the same S 55 C work material. Thus, the rating of individual wheels has been determined from the standpoints of metal removal rate, wheel wear rate, G-ratio, surface finish, and grinding force. Also, the effect of wheel width on the performance of wheel was investigated. It is evident from this study that the metal removal rate is not so much dependent upon wheel type, while wheel wear rate, as well as G-ratio, varies very much according to wheel type. The WA wheel showed the most high G-ratio, and on the contrary, the A wheel the lowest value. The 40 SH wheel was found to be superior to the SH or the A wheel in G-ratio. The reason for the high G-ratio in the WA wheel is considered to be due to the strong bonding of grain with bond. Increasing wheel width leads to greater metal removal rate, but there is no change in the G-ratio. The same degree of surface roughness is obtained for a fixed metal removal rate, regardless of wheel type.