Cutting by use of rotating axially moving tool – With stopping upon completion of prescribed operation
Patent
1990-12-11
1992-11-10
Howell, Daniel W.
Cutting by use of rotating axially moving tool
With stopping upon completion of prescribed operation
32420716, 324226, 408 16, B23B 4900
Patent
active
051619229
ABSTRACT:
Electronic measuring and control of countersinking depth and/or failure of a drilling tool. Eddy current proximity detecting means is utilized for stopping and retracting the countersink drilling process after a pre-selected depth is achieved wherein a visual indication of the countersink depth is provided by way of sequentially lit LED segments through structure for detecting a surface up and away from the working end of the tool thereby avoiding contamination problems. Further, detection of vibration or chatter in the workpiece is shown as a means for detecting tool defects.
REFERENCES:
patent: 2985823 (1961-05-01), Wright, Jr.
patent: 3747085 (1973-07-01), Bala et al.
patent: 4338823 (1982-07-01), Iwasaki
patent: 4385297 (1983-05-01), Schmitt et al.
patent: 4535624 (1985-08-01), Ginns et al.
patent: 4703262 (1987-10-01), Fujioka et al.
Donahue B. A.
Gardner Conrad O.
Howell Daniel W.
The Boeing Company
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