Boots – shoes – and leggings
Patent
1982-09-03
1985-04-30
Smith, Jerry
Boots, shoes, and leggings
364157, 364475, 364507, 364508, 364551, 73104, 73660, 340680, 340683, G06F 1546
Patent
active
045147973
ABSTRACT:
A worn tool detector system for analyzing input signals from a sensor were the signal is in the form of an analog waveform exhibiting periodic impulses exceeding the average amplitude thereof as the tool wears. A microprocessor controlled variable gain amplification network is utilized to normalize the average waveform amplitude to a fixed level. During machine operation, impulses are detected by comparing the sensor waveform to a programmable selected ratio of the normalized level. When a given number of successive impulses are received the microprocessor generates a warning signal which may be used to retract the tool. An adaptive mode is disclosed wherein the sensor waveform throughout the course of the machining operation is repetitively normalized to adjust for different sensor waveform amplitudes.
REFERENCES:
patent: Re30298 (1980-06-01), Keller
patent: 3694637 (1972-09-01), Edwin et al.
patent: 4023044 (1977-05-01), Miller et al.
patent: 4207567 (1980-06-01), Juengel et al.
patent: 4228514 (1980-10-01), Wiess
patent: 4399513 (1983-08-01), Sullivan et al.
patent: 4471444 (1984-09-01), Yee et al.
Technical Paper entitled, "An On-Line Method of Determining Tool Wear by Time-Domain Analysis", Society of Manufacturing Engineers, MR82-901.
GTE Valeron Corporation
MacDonald Allen
Smith Jerry
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