レジンボンドCBN砥石の形直し特性の一検討

無気孔形CBN砥石の最適形直し・目直し法に関する研究 (第1報)

抄録

This report deals with the truing characteristics of the resin bond CBN wheel, in which the multipoint diamond truer is fed at a constant depth of cut. The total depth of cut of 30-50 μm is required for the initial truing operation of a new wheel. The truing process is classified into four stages. In the first two stages, CBN grains are mainly trued and both grains and bond are ground in the latter two stages, which causes a serious damages on a wheel surface by truing heat. In order to avoid the thermal damages, several passes of the first two stages of truing are necessary for large amount of truing. The setting depth of cut is remarkably different from the actual one due to the elastic deformation of the bond material. As truing proceeds, the new grains below the outermost wheel surface appear and the flank area of cutting edges increase. As a result, the cutting edge spacing becomes close.