Thrust and torque sensitive drill

Details Thrust and torque sensitive drill Thrust and torque sensitive drill

1988-05-26

1989-04-18

Weidenfeld, Gil

Cutting by use of rotating axially moving tool

With control means energized in response to activator...

To control tool rotation

408138, 318433, B23B 4100

Patent

active

048222151

ABSTRACT:
A thrust and torque sensor is provided for an automatic drill so as to result in an efficient drilling operation for laminated materials. Sensors are placed in one instance in conjunctioln with a spindle and in another instance to a shaft in the drive train so as to sense the thrust and torque placed on the spindle. In a preferred manner, a yoke with strain gauges is connected to a bearing race on the spindle to sense thrust and strain gauges are placed on a beam connected to a shaft to sense torque. Signals from the strain gauges are then employed by a computer to control the drill.

REFERENCES:
patent: 3572447 (1971-03-01), Pauley et al.
patent: 4198180 (1980-04-01), Schultz
patent: 4413936 (1983-11-01), Kuhlmann
patent: 4478538 (1984-10-01), Kakino
patent: 4487270 (1984-12-01), Huber
patent: 4648756 (1987-03-01), Alexander et al.
patent: 4688970 (1987-08-01), Eckman
patent: 4745557 (1988-05-01), Pekar et al.

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