Grinding cup and holder device

Details Grinding cup and holder device Grinding cup and holder device

1995-02-03

1997-06-17

Kisliuk, Bruce M.

Abrading

Accessory

Cooling

451270, 451548, 451342, B24B 5502

Patent

active

056392737

ABSTRACT:
The present invention relates to improvements in devices for use as grinding cups for grinding the hard metal pins or working tips of drill bits and more specifically, but not exclusively, for grinding the tungsten carbide cutting teeth or buttons of a drilling head and the means for detachably connecting the grinding cups to the grinding machine. The grinding cups consisting of a bottom grinding section and a top body section having top and bottom surfaces. The grinding section is formed from a material capable of grinding the tungsten carbide button bits such as a metal and diamond matrix. The peripheral edge in the bottom surface may be bevelled to facilitate the removal of steel from the face of the bit around the base of the button during grinding. A centrally disposed convex recess is formed in the bottom surface having the desired profile for the button to be ground. The body section has a centrally disposed cavity formed in the top surface of the grinding cup. This cavity is shaped and sized to permit the grinding cup to be detachably connected to the drive member of a grinding machine and rotated during the grinding operation. One or more passageways connect the floor of the cavity in the top surface of the grinding cup with the convex recess in the grinding section to permit a coolant, preferably water, optionally mixed with cutting oil, to be provided to the surface of the button during grinding, through one or more outlets.

REFERENCES:
patent: 1873472 (1932-08-01), Pfauser
patent: 2704681 (1955-03-01), Fischer
patent: 4523411 (1985-06-01), Freerks
patent: 4616738 (1986-10-01), Shurtliff
patent: 4858388 (1989-08-01), Bice
patent: 5070654 (1991-12-01), Manqvist et al.
patent: 5448930 (1995-09-01), Sjolander et al.

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