1982 年 48 巻 12 号 p. 1621-1627
This paper describes the experimental analysis on the wear mechanism of CBN (cubic boron nitride) wheel in grinding high-carbon high-vanadium steel. The reciprocating plunge surface grinding tests for 3.2% C-11.4% V steel were carried out by using CBN resinoid wheel, and the parameters which represent the grinding ability of grinding wheel, such as radial grinding wheel wear, specific grinding wheel wear, grinding force, number of cut-ting edges, etc. were measured to know the major factor controlling the wheel wear. Furthermore, the variation of wheel working surface in the grinding process was observed microscopically by using a two stage replica method to grasp the shape of wheel wear. Some results obtained in this paper are summarized as follows : (1) When the coefficient of grain depth of cut ψg= (v/V), √t/D does not exceed a critical value ψgc= 5.6 × 10-5, specific grinding wheel wear rg is proportional to ψg0.32 approximately. However, rg increases rapidly with ψg when ψg exceeds ψg, (2) When ψg does not exceed ψgc, average grinding force per a grain cutting edge fts is solely a function of ψg approximately. From this relation, it was indicated that rg was proportional to fts0.41 approximately.