Unusual vibration transducer apparatus in machine tools

Details Unusual vibration transducer apparatus in machine tools Unusual vibration transducer apparatus in machine tools

1981-05-26

1984-04-03

Trafton, David L.

Communications: electrical

Condition responsive indicating system

Specific condition

51 2C, 51 2AA, 5116576, 340683, G08B 2100

Patent

active

044411030

ABSTRACT:
By mounting unusual vibration transducer apparatus consisting of a piezo-electric vibration detecting member, a pre-amplifier including a gain adjust knob, a comparator including level adjust knob, a monostable multivibrator including a pulse width adjust knob, a preset counter including preset value setting switch, a flip flop memorizing signals, an amplifier amplifying signals, and an output circuit at a machine tool like a grinding machine, a lathe, a milling machine, a planer, and/or a drilling machine, or by mounting only a piezo-electric vibration detecting member and installing the other components at a separate position outside a specified machine tool, vibrations produced during machining work are taken out by a comparator as high or low signal and alarm is then issued when such a vibration reaches the preset value of the counter, causing rotation or travel of a tool to stop or feed of workpiece to stop, and/or causing the rapid infeed rate of wheelhead to be changed to an adequate roughing feedrate.

REFERENCES:
patent: 2932134 (1960-04-01), Torn et al.
patent: 3455149 (1969-07-01), Foster et al.
patent: 3842545 (1974-10-01), Possati
patent: 4023044 (1977-05-01), Miller et al.
patent: 4209779 (1980-06-01), Beck et al.
patent: 4220995 (1980-09-01), Shoda

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