Broken, chipped and worn tool detector

Details Broken, chipped and worn tool detector Broken, chipped and worn tool detector

1977-11-17

1980-06-10

Swann, III, Glen R.

Communications: electrical

Condition responsive indicating system

Specific condition

73104, 408 16, G08B 2100

Patent

active

042075670

ABSTRACT:
A method and apparatus for monitoring tool wear and breakage as a function of the electrical power dissipated by a machine tool which is carrying out subsequent cuts for removing stock. Optimal tool life is achieved by monitoring tool wear and breakage as a function of the power dissipated by a machine tool by monitoring said power, storing pertinent selected values thereof associated with successive cuts of the tool and periodically comparing the stored values with one another to determine if the difference therebetween exceeds a predetermined limit value, in which case the operator is warned and/or the machine tool is de-energized. The analysis phase can be carried out by a general-purpose microprocessor or discrete digital or analog components.

REFERENCES:
patent: 3545310 (1970-12-01), Porath et al.
patent: 3809870 (1974-05-01), Auble et al.
patent: 3930248 (1975-12-01), Keller
patent: 3962694 (1976-06-01), Calia et al.
patent: 4023044 (1977-05-01), Miller et al.
patent: 4076442 (1978-02-01), Cox, Jr. et al.
patent: 4087801 (1978-05-01), Noh
patent: 4090403 (1978-05-01), Tsukada et al.

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