The method of extracting the dynamic vibration frequency

A vibration frequency, dynamic technology, applied in the measurement of vibration, vibration measurement in solids, instruments, etc., can solve the problem of not revealing the design method of multiple vibration measurement components
CN106855432BActive Publication Date: 2019-07-26METAL INDS RES & DEV CENT
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
METAL INDS RES & DEV CENT
Publication Date
2019-07-26

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Abstract

A method for acquiring a dynamic vibration frequency includes the following steps. At least five pairs of vibration measurement elements are selected. A bandwidth range of the vibration measurement elements is determined. The vibration measurement elements in sequence on a first side and a second side, which are geometrically symmetrical to each other, of a main shaft are used to measure vibration displacements in a symmetrical position arranging manner. The vibration displacements measured by the vibration measurement elements of either of the first side and second side are corrected, so as to differentially eliminate an ambient noise. Positions of nodes located on the first side and the second side are calculated. The vibration displacements in the preceding steps are used to deduce dynamic vibration frequencies of main harmonics. A vibration mode of the main shaft is confirmed.
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Description

technical field

[0001] The present invention relates to a method for capturing dynamic vibration frequency, in particular to a method for capturing dynamic vibration frequency during cutting. Background technique

[0002] The market demand for micro-milling processing has increased rapidly, and the focus of industrial competition has been towards intelligent development. The most important link is real-time cutting vibration monitoring, which can be used to understand the operation status of the spindle and control the yield rate of equipment. However, the unit price of the high-precision cutting vibration sensing device currently available on the market is relatively high, and the feasibility of introducing it is not good.

[0003] The main function of on-line chatter avoidance is to protect cutting machine tools. Through the micro-vibration sensing element installed in the machining area of ​​the cutting tool (such as the sheet metal of the spindle), the analysis software...

Claims

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