Abnormality detection apparatus for tool and numerical control apparatus provided with same
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United States of America Patent
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May 7, 2002
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N/A
app pub date -
Sep 8, 2000
filing date -
Sep 10, 1999
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Abstract
An abnormality detection apparatus for a tool (11) is described for judging abnormalities of a tool by a uniformly set threshold value in relation to a cutting load even in a machining process wherein a feed rate changes every moment. The abnormalities of the tool can be judged by the uniformly set threshold value on the basis of the tool load wherefrom the feed load that fluctuates upon the feed rate has been removed.
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