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Vibration determination method and vibration determination device

  • US 9,211,624 B2
  • Filed: 04/27/2012
  • Issued: 12/15/2015
  • Est. Priority Date: 06/16/2011
  • Status: Active Grant
First Claim
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1. A vibration determination method for determining a type of chatter vibration occurring in a rotary shaft in a machine tool that has the rotary shaft rotating a tool or a workpiece comprising:

  • a first step for detecting time-domain vibration of the rotary shaft and rotation speed of the rotary shaft during rotation;

    a second step for calculating frequency-domain vibration based on the time-domain vibration, and obtaining a plurality of peak values and peak frequencies corresponding to each of the plurality of peak values in the calculated frequency-domain vibration;

    a third step for obtaining a synchronizing type vibration range for determining the type of the chatter vibration using the peak frequencies correspond to each of the plurality of peak values; and

    a fourth step for determining whether the type of the chatter vibration is a forced chatter vibration of a synchronizing type vibration based on a relation between the peak frequencies and corresponding peak values and the synchronizing type vibration range obtained using the peak frequencies.

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