Abrasive wheel

Details Abrasive wheel Abrasive wheel

B - Operations, Transporting

24

D

51/147

B24D 5/00 (2006.01) B24B 3/33 (2006.01) B24B 19/26 (2006.01) B24D 5/02 (2006.01) B24D 7/18 (2006.01)

Patent

CA 1322459

ABSTRACT An abrasive wheel for grinding the cutting pins of a button-type drilling bit in a grinding machine of the kind provided with a rotatable holder for fixating the pins of the bit in a grinding position and for rotating thus fixated pins. The machine also includes a spindle on which the abrasive wheel can be mounted in a given position. The spindle/holder is linearly movable in a plane which extends through and is contained by the respective rotational axes of the holder and the spindle and in a direction parallel with the rotational axis of the spindle. The abrasive wheel includes circular flange parts which embrace a profiled groove therebetween. To enable cutting pins to be ground to an obtuse tip-pro- filed shape with the aid of such an abrasive wheel, the profiled groove (12), when seen in cross-section, is formed symmetrically around a line (27) which intersects the rotational axis (21) of the abrasive wheel at an angle whose complementary angle is equal to the angle of inclination of the spindle. The inward part of the profiled groove (12) is widened symmetrically in rela- tion to a pre-determined transverse measurement and presents at least the same widening along the whole of its cross-section, upto the location of an outer limit- ing line (31), where the groove (12) has a width or a breadth which is greater than the diameter of the pin for which the abrasive wheel (2) is intended. (Figure 3)

600199

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