Cutting by use of rotating axially moving tool – With control means energized in response to activator... – To control tool rotation
Patent
1991-01-23
1992-02-11
Bishop, Steven C.
Cutting by use of rotating axially moving tool
With control means energized in response to activator...
To control tool rotation
318 39, 408 10, 408 17, 408 76, B23Q 15013
Patent
active
050871579
ABSTRACT:
The states of contact switches are switched when a mode switch is turned on. If the drilling operation is effected by means of a drill motor in this state, an oscillation signal which is repeatedly set to "H" and "L" in a preset period corresponding to an output of an oscillator is supplied to the control terminal of a firing pulse generator. The firing pulse generator interrupts supply of the control signal to the control terminal of a triac in the above preset period based on the oscillation signal supplied to the control terminal thereof to interrupt supply of an AC power source from a commercial AC power source to a bridge-type rectifier so as to intermittently drive a feed motor which is energized by an output of the rectifier in the above preset period. As a result, the drill motor can be intermittently fed towards a to-be-worked object by means of the feed motor, and, when the feeding operation is interrupted, a cutting operation can be instantaneously stopped and swarf can be cut apart.
REFERENCES:
patent: 4559577 (1985-12-01), Shoji et al.
patent: 4780654 (1988-10-01), Shoji et al.
Asano Osamu
Shoji Michihiro
Bishop Steven C.
Nitto Kohki Co. Ltd.
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