| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vitrified bond super abrasive grain wheel which includes a super abrasive grain layer formed by joining super abrasive grains with a vitrified bond and has sharp grinding performance with stable low grinding resistance even if grinding is performed continuously, and also provide a method of grinding using the super abrasive grain wheel. <P>SOLUTION: The super abrasive grain layer includes small-diameter spherical pores disposed therein to be dispersed, middle-diameter spherical pores disposed therein to be dispersed, and large-diameter spherical pores disposed therein to be dispersed. The small-diameter pores acts so that the vitrified bond is broken into pieces to maintain sharp grinding performance. The middle-diameter pores acts so that the pore rate of the super abrasive grain layer is increased. The large-diameter pores acts so that chips are discharged smoothly. Desirably, the averaged diameter of the small-diameter pores is 0.1-2 μm, the averaged diameter of the middle-diameter pores is 10-50 μm, and the averaged diameter of the large-diameter pores is 80-200 μm. <P>COPYRIGHT: (C)2013,JPO&INPIT |
