Boots – shoes – and leggings
Patent
1981-03-25
1984-06-26
Ruggiero, Jospeh F.
Boots, shoes, and leggings
318565, 364184, 364507, 364511, G06F 1546, G05B 2302
Patent
active
044569602
ABSTRACT:
Method and device for detecting tool abnormality in machine tools in which a threshold value is determined based on the condition of a tool in machining and tool abnormality is detected by comparing data successively obtained from the tool during machining with the threshold value. The threshold value is determined by computing the tool condition data in machining for a period when an externally provided switch is on and stored in a memory of the device when the switch turns off.
The application of this invention to numerical controlled machine tools is also disclosed in which a plurality of threshold values are determined according to machining conditions in each machining process and tool abnormality is detected by comparing tool condition data during machining with one of the threshold values corresponding to the condition of the machining.
REFERENCES:
patent: 4031368 (1977-06-01), Colding et al.
patent: 4078195 (1978-03-01), Mathias et al.
patent: 4176396 (1979-11-01), Howatt
patent: 4220995 (1980-09-01), Shoda
patent: 4279013 (1981-07-01), Cameron et al.
patent: 4326257 (1982-04-01), Sata et al.
patent: 4351029 (1982-09-01), Maxey et al.
Kabushiki Kaisha Komatsu Seisakusho
Ruggiero Jospeh F.
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