B - Operations – Transporting – 24 – B
Patent
B - Operations, Transporting
24
B
51/84
B24B 19/00 (2006.01) B24B 3/24 (2006.01)
Patent
CA 1049789
DRILL GRINDING DEVICE Abstract of the Disclosure A device for positioning, holding and feeding twist drills and the like to a grind stone to grind the bevels of the faces of the drill accurately and symmetrically is dis- closed. A drill locking means has a bed for holding the drill and a fence to restrain it in one direction. A finger which has means forming an inclined plane on one side and which comes to a point near the fence is carried by the bed. The flute trailing edge of the drill engages the inclined plane at various points depending on the drill size. The force of the grind stone rotates the flute trailing edge against the inclined plane. There is also an adjustable drill stop to provide longitudinal drill positioning. The combination of bed, fence, finger and drill stop locks the drill in place against the grind stone during the grinding operation. To grind the opposite face, the drill is rotated approximately 180° and replaced. The moving grind stone will urge the drill into exact 180° opposition in the drill lock- ing means, automatically. The drill is fed in a straight line into the stone by means of nesting troughs. The drill locking means in trough form with the drill in place can be removed for inspection or quenching of the drill and returned to the same position. means for controlling the forward excursion of the drill is provided by a threaded screw carried by one of the troughs which bears against the other trough. A tension bar tightens by rotation against the carrying trough to hold the screw in place.
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