Device for detecting tool abnormality

Details Device for detecting tool abnormality Device for detecting tool abnormality

1982-09-28

1984-10-23

Goldberg, Gerald

Cutting by use of rotating axially moving tool

With randomly-actuated stopping means

Responsive to condition of tool or tool-drive

408 9, 408 11, 73104, 340683, 409134, 409194, G01N 358, G08B 2100, B23B 4900

Patent

active

044785380

ABSTRACT:
When a drill is overloaded, while cutting a hole in a workpiece, a torque limiter disconnects the drill from a main spindle. As the drill is disconnected from the main spindle, the torque limiter generates high-level elastic waves. The elastic waves are converted by a transducer into a voltage signal. The level of the voltage signal is compared with a threshold value.

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