US Patent: 5,179,809
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| Drill Grinding Machine
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Patentee:
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| Richard L. Schroeder (exact or similar names) - North Fond du Lac, Fond du Lac County, WI |
| Manufacturer: |
| Not known to have been produced |
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Patent Dates:
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| Applied: |
Apr. 08, 1992 |
| Granted: |
Jan. 19, 1993 |
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Joel Havens
"Vintage Machinery" entry for Giddings & Lewis Manufacturing Co.
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Description: |
| This is a divisional of co-pending application filed on 23 Apr., 1990 now U.S. Pat. No. 5,125,186.
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. |
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