PURPOSE: To facilitate grinding of a rolling roll formed of a high hardness high toughness by using cubic baron nitride having high hardness or metal- covered cubic baron nitride.
CONSTITUTION: A resilient layer 3 formed of a resilient material and a grinding grain layer 4 containing a grinding grain formed of cubic baron nitride or metal-covered baron nitride are formed, in order named, on the outer periphery of a base metal 1 formed of a metallic material. In this case, grinding is effected by using a grinding wheel formed such that the grinding grain layer of two end parts 4a in the axial direction of the grinding grain layer 4 is formed of a material having a grain size of 170-400, hardness of P-T, and concentration of 30-100 and the grinding grain layer of an intermediate part 4b in the axial direction is formed of a material having a grain size of 16-140, hardness of P-T, and concentration of 50-150. This method performs a high-efficient work to grind a rolling roll, formed of a high rigidity high toughness material without generating a grinding mark, such as a feed mark and chatter, on a surface to be ground.
HAYAKAWA HAJIME
FUKUJU YOSHIRO
NORITAKE CO LTD