Title:
CHATTERING DETECTION METHOD FOR COLD ROLLING MILL, CHATTERING DETECTION DEVICE FOR COLD ROLLING MILL, COLD ROLLING METHOD, AND COLD ROLLING MILL
Document Type and Number:
WIPO Patent Application WO/2020/137014
Kind Code:
A1
Abstract:
This chattering detection method for a cold rolling mill involves a measurement step for measuring vibration in the cold rolling mill, a calculation step in which, for a vibration time waveform measured in the measurement step, calculates a time waveform of vibration intensity by performing a frequency analysis with a prescribed period not longer than the time that periodic vibration continues without converging, and a predictive vibration determination step in which, on the basis of the number of points at which the vibration intensity included in the vibration intensity time waveform calculated in the calculation step is greater than a prescribed threshold value, vibration in the cold rolling mill that is predictive of chattering is detected.
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Inventors:
NAGAI YU (JP)
NOHARA KOICHI (JP)
NOHARA KOICHI (JP)
Application Number:
PCT/JP2019/034977
Publication Date:
July 02, 2020
Filing Date:
September 05, 2019
Export Citation:
Assignee:
JFE STEEL CORP (JP)
International Classes:
B21B38/00; B21B33/00; B21C51/00
Domestic Patent References:
| WO2000072989A1 | 2000-12-07 |
Foreign References:
| JP2015009261A | 2015-01-19 | |||
| JPH08108205A | 1996-04-30 | |||
| JPS50159453A | 1975-12-24 | |||
| JP2013099757A | 2013-05-23 | |||
| JP2001137915A | 2001-05-22 | |||
| JP2015009261A | 2015-01-19 |
Other References:
See also references of EP 3903953A4
Attorney, Agent or Firm:
SAKAI INTERNATIONAL PATENT OFFICE (JP)
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