Contact detecting apparatus

Details Contact detecting apparatus Contact detecting apparatus

1981-03-10

1983-10-11

Krawczewicz, Stanley T.

Cutting by use of rotating axially moving tool

With control means energized in response to activator...

324 51, 340644, B23B 3904, G01R 3102, G08B 2100

Patent

active

044089333

ABSTRACT:
A contact detecting apparatus for detecting the contact of a workpiece with a tool in a machine tool which includes a magnetic coil mounted on the periphery of a spindle head and connected to an AC power source for generating an induced current in a looped secondary circuit including the workpiece, a work table, a machine body, a spindle head, a tool spindle and the tool, when the workpiece and the tool are moved relatively into contact with each other. A first conductive wire forming a secondary winding of one turn is arranged in a parallel relationship with the looped secondary circuit and a current induced therein by energization of the magnetic coil. A second conductive wire is connected at one end thereof to the looped secondary circuit. A detecting device is connected to the first and second conductive wires for detecting contact between the workpiece and the tool based on the voltage induced across the first and second conductive wires.

REFERENCES:
patent: 4203691 (1980-05-01), Nishimura et al.

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