Arrangement for detecting the state of a tool

Details Arrangement for detecting the state of a tool Arrangement for detecting the state of a tool

1975-04-28

1976-11-30

Simpson, Othell M.

Cutting by use of rotating axially moving tool

Processes

Bit detachable

B23B 3500

Patent

active

039946126

ABSTRACT:
A system is disclosed for detecting the state of a rotating machining tool, such as a drill bit, in a machining head. The system employs an electromagnetic detector having a coil connected in series with an oscillating circuit. As the tool rotates, its lands and flutes cause detectable variations in reluctance which are used to modulate the output of the oscillator circuit. The modulated oscillator output is monitored as an indication of the state of the tool.

REFERENCES:
patent: 3001421 (1961-09-01), Martens
patent: 3310796 (1967-03-01), Sanders
patent: 3621395 (1971-11-01), Brown et al.
patent: 3747085 (1973-07-01), Bala et al.

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