MONITORING METHOD FOR CHATTER VIBRATION DURING MACHINING PROCESS

Title:

MONITORING METHOD FOR CHATTER VIBRATION DURING MACHINING PROCESS

Document Type and Number:

WIPO Patent Application WO/2021/042434

Kind Code:

A1

Abstract:

Provided is a monitoring method for chatter vibration during a machining process, comprising the following steps: S1, collecting original signals related to chatter vibration during a machining process; S2, for the original signals, updating data points in a sliding window with a set step size to obtain a signal segment for calculation and analysis, wherein the step size means the number of data points per update of the sliding window, and the step size is not greater than the size of the sliding window; S3, calculating a fractal dimension of the signal segment in the sliding window by using a fractal algorithm; and S4, comparing the calculated fractal dimension with an identification threshold, so as to determine whether chatter vibration occurs during the machining process. The monitoring method does not require preprocessing of the measured signals, can greatly improve the calculation efficiency, and guarantee the accuracy of chatter vibration identification.

More Like This:

JP5615681	Machine tool vibration suppression device and method
WO/2016/084171	NUMERICAL CONTROL APPARATUS
JP7281264	Machine tool and its operating method

Inventors:

FENG FENG (CN)
XU CHAO (CN)
MEI XUEYU (CN)
FENG PINGFA (CN)
MA YUAN (CN)

Application Number:

PCT/CN2019/108453

Publication Date:

March 11, 2021

Filing Date:

September 27, 2019

Export Citation:

Click for automatic bibliography generation Help

Assignee:

TSINGHUA SHENZHEN INT GRADUATE SCHOOL (CN)

International Classes:

B23Q17/12; G01H1/12

Domestic Patent References:

WO1997043729A1

1997-11-20

Foreign References:

CN103786069A	2014-05-14
CN109991925A	2019-07-09
US10245698B2	2019-04-02
JP2018054587A	2018-04-05

Other References:

WU, SHI, LIU XIANLI, XIAO FEI: "Experimental Study of the Nonlinear Characteristics of Vibration in Milling Chatter", JOURNAL OF VIBRATION, MEASUREMENT & DIAGNOSIS, vol. 32, no. 6, 1 December 2012 (2012-12-01), pages 935 - 1035, XP055788790, DOI: 10.16450/j.cnki.issn.1004-6801.2012.06.005