Cutting by use of rotating axially moving tool – With control means energized in response to activator... – To control tool rotation
Patent
1985-08-09
1987-08-25
Weidenfeld, Gil
Cutting by use of rotating axially moving tool
With control means energized in response to activator...
To control tool rotation
408 10, 408 12, 408137, 408702, B23B 4100
Patent
active
046889701
ABSTRACT:
A power drill and automatic control system includes a drill spindle for mounting a rotary cutter, a spindle rotation drive including a drive motor and an associated rotation drive mechanism operably connected to the spindle to rotate it; a spindle feed drive includes a feed motor and an associated feed drive mechanism operably connected to the spindle to feed it in a forward direction toward a workpiece and in a reverse direction retracting it away from the workpiece. Control is provided to start and stop the spindle rotation drive motor and the spindle feed motor independently. Control is provided for the spindle rotation drive to vary the rotational speed. Control is provided with the spindle feed drive to vary the rate of feed of the spindle. A sensor with the spindle rotation drive senses operational torque of the spindle. Another sensor with the spindle feed drive senses thrust force on the spindle and the associated cutter. A rotation sensor with the spindle rotation drive senses and monitors the spindle rotation. Another rotation sensor with the spindle feed drive senses and monitors the spindle feed drive rotation. A control circuit is operably connected to control rotational speed of the spindle, the rate of feed motion of the spindle toward and retracting from a workpiece, to control the displacement of the spindle to a predetermined depth and to control removal of the cutter from the workpiece on completion of the drilling operation.
REFERENCES:
patent: 2901927 (1959-09-01), Morgan
patent: 3259023 (1966-07-01), Rieger et al.
patent: 3458881 (1969-08-01), Drechsler et al.
patent: 4157231 (1979-06-01), Phillips
patent: 4198180 (1980-04-01), Schultz
patent: 4346444 (1982-08-01), Schneider et al.
patent: 4540318 (1985-09-01), Hornung et al.
Dresser Industries Inc.
Howell Daniel W.
Weidenfeld Gil
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