Contact detector for a machine tool

Details Contact detector for a machine tool Contact detector for a machine tool

1985-09-11

1987-04-14

Weidenfeld, Gil

Gear cutting, milling, or planing

Milling

Including means to infeed rotary cutter toward work

324207, 324226, 408 6, 408 13, B23B 3904

Patent

active

046574514

ABSTRACT:
A contact detecting system for detecting the contact of a tool element, supported by a main shaft of a machine, with a workpiece comprises exciting and detecting coil assemblies, an electric power source for supplying a high frequency electric current to the exciting coil assembly to cause the latter to produce an induction current flowing in a loop circuit constituted by the machine shaft, the tool element and a framework of the machine, and a detector unit for generating a detection signal indicative of the actual contact of the tool element with the workpiece when the detector unit has detected the presence of a current component, which has resulted from the induction current generated by the exciting coil assembly, in the output signal from the detecting coil assembly.

REFERENCES:
patent: 3777255 (1973-12-01), Young et al.
patent: 4000448 (1976-12-01), Shum et al.
patent: 4203691 (1980-05-01), Nishimura et al.
patent: 4329771 (1982-05-01), Eto et al.
patent: 4396322 (1983-08-01), Nomura et al.
patent: 4401945 (1983-08-01), Juengel
patent: 4408933 (1983-10-01), Tomita et al.
patent: 4440530 (1984-04-01), Yamakage

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