Analysis method for self-excited vibration

Abstract

This invention provides a technology for identifying the type of chatter vibration occurring when chatter vibration is present. [Solution] The method for analyzing self-excited chatter vibration includes a first step (S10) of acquiring vibration data in two directions different from the tool rotation axis direction, a second step (S12) of acquiring the frequency components of the self-excited chatter vibration in two directions from the vibration data in two directions, and a third step (S14) of determining whether or not mode-coupling type chatter vibration is occurring based on the frequency components of the self-excited chatter vibration in two directions.

Claims

1. A method for analyzing self-excited vibrations, The first step involves acquiring vibration data in two directions different from the tool rotation axis, The second step involves obtaining the frequency components of the two-directional self-excited chatter vibration from the two-directional vibration data, A third step involves determining whether or not mode-coupling type chatter vibration requiring vibration countermeasures is occurring, based on the frequency components of self-excited chatter vibration in two directions. A method for analyzing self-excited chatter vibrations, characterized by having the following features.

2. The first step is to acquire vibration data in two directions perpendicular to the tool rotation axis. The method for analyzing self-excited chatter vibrations according to feature 1.

3. The second step involves removing the frequency components of forced vibration and the harmonic components caused by the cutting process, which are centered on the chatter vibration frequency, from the frequency components of the generated vibration to obtain the frequency component of self-excited chatter vibration. The method for analyzing self-excited chatter vibrations according to feature 1.

4. The third step is to determine whether or not mode-coupling type chatter vibration is occurring based on the shape of the vibration trajectory derived from the frequency components of self-excited chatter vibration in two directions. The method for analyzing self-excited chatter vibrations according to feature 1.

5. The third step is to determine whether or not mode-coupling type chatter vibration is occurring based on the phase difference of the frequency components of the two-directional self-excited chatter vibration. The method for analyzing self-excited chatter vibrations according to feature 1.

6. The first step is to acquire vibration data detected by a sensor component installed in the tool holder. The method for analyzing self-excited chatter vibrations according to feature 1.

7. A method for analyzing self-excited vibrations, The first step involves acquiring vibration data in two directions different from the tool rotation axis, The second step involves obtaining the frequency components of the two-directional self-excited chatter vibration from the two-directional vibration data, The third step involves identifying the type of self-excited chatter vibration based on the frequency components of the self-excited chatter vibration in two directions, The fourth step involves instructing vibration countermeasures according to the type of self-excited vibration identified, A method for analyzing self-excited chatter vibrations, characterized by having the following features.

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