Abrasive tool making process – material – or composition – With carbohydrate or reaction product thereof
Patent
1990-04-23
1992-06-30
Rachuba, M.
Abrasive tool making process, material, or composition
With carbohydrate or reaction product thereof
51 94CS, 51 95LH, 51219R, B24B 300
Patent
active
051251868
ABSTRACT:
A drill grinding machine employs independent servo motors for drill rotation, drill lift, and drill feed. The three motors are connected through respective suitable drive mechanisms to a tubular spindle that is rotatably mounted within a work head. The work head contains a hydraulic clamp for selectively chucking and releasing a drill holder. A drill is gripped in the drill holder such that the drill point is proximate a grinding wheel. The drill, lift, and feed motors are actuated to rotate the drill about its longitudinal axis and to move the drill point along a predetermined cyclical path of contact with the grinding wheel to grind a selected point. Combinations of points may be ground on a single drill by suitably controlling the lift and feed motors. A timing pad adjustably mounted to the machine housing cooperates with the lift and feed motors and the work head clamp to enable the drill to be manually timed prior to a grinding cycle. Drill rock is selectively available through spring loaded contact between the work head and a hardened strip that is rotatably mounted in the machine housing.
REFERENCES:
patent: 3040480 (1962-06-01), Winslow et al.
patent: 3266194 (1966-08-01), Winslow et al.
Cayen Donald
Giddings & Lewis, Inc.
Rachuba M.
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