Measuring and testing – With fluid pressure – Dimension – shape – or size
Patent
1998-08-03
1999-11-23
Noori, Max
Measuring and testing
With fluid pressure
Dimension, shape, or size
7386268, G01B 1308
Patent
active
059879670
ABSTRACT:
A main-shaft malfunction-state detector in an air bearing type machine tool, in which an abnormal contact of a main shaft with a housing is reliably and automatically detected. The contacting state of the main shaft 11 and the housing 13 is detected through the presence of electric conductivity by a contact detection means 31. A contact decision means 32 determines the contact of the main shaft 11 with the housing 13 based on the detected conductivity, thus automatic and certain preventative measures, such as the main shaft of the machine tool stops and so on, are based on the above decision.
REFERENCES:
patent: 4423635 (1984-01-01), Senicourt et al.
patent: 4433571 (1984-02-01), Snow, Jr.
patent: 4977777 (1990-12-01), Bieg
patent: 5174039 (1992-12-01), Murai
patent: 5311763 (1994-05-01), Gibbs, Jr. et al.
Fujie Hideo
Momochi Takeshi
Nagashima Kazuo
Shiozaki Masahito
Noori Max
Toshiba Kikai Kabushiki Kaisha
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