Tool wear and tool failure monitor system

Details Tool wear and tool failure monitor system Tool wear and tool failure monitor system

1981-11-18

1984-04-10

Chin, Gary

Boots, shoes, and leggings

364474, 340680, 73104, G06F 1546, G01N 1902

Patent

active

044424949

ABSTRACT:
In a computerized numerical control (CNC) or a direct numerical control (DNC) machine tool, the second derivative as a function of time of the net power applied to the cutting tool is used to detect approaching tool failure, and a statistical representation of such occurrences with a series of tools is used to derive instantaneously the percentage of wear experienced by a new tool in terms of the statistically expected critical level of net power.

REFERENCES:
patent: 3809870 (1974-05-01), Auble et al.
patent: 4176396 (1979-11-01), Howatt
patent: 4207567 (1980-06-01), Juengel et al.
patent: 4228514 (1980-10-01), Weiss
patent: 4260986 (1981-04-01), Kobayashi et al.
patent: 4351029 (1982-09-01), Maxey et al.
"Investigation of Adaptive Exponential Smoothing Algorithms in Monitoring Tool Wear", by DeVries et al; published in a paper presented at North American Metalworking Research Conf. IX, on pp. 523-527.
"Does Adaptive Control Still Promise Improved Productivity", by Larsen, published in Iron Age, Jul. 27, 1981, pp. 57-68.

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