Title:
METHOD FOR PREDICTING BULGING DEFORMATION OF CONTINUOUS CASTING BILLET BY MEANS OF HILBERT-HUANG TRANSFORM
Document Type and Number:
WIPO Patent Application WO/2021/139051
Kind Code:
A1
Abstract:
Disclosed is a method for predicting bulging deformation of a continuous casting billet by means of Hilbert-Huang transform, which belongs to the technical field of ferrous metallurgy continuous casting detection. The method comprises: firstly, directly reading, via the Ethernet, a liquid level signal detected by a crystallizer liquid level control system, and synchronously collecting process parameters such as withdrawal speed and casting of a casting machine; secondly, performing empirical mode decomposition and Hilbert marginal spectrum analysis on the liquid level signal by means of Hilbert-Huang transform to obtain intrinsic mode functions C1(t)-CNN(t) of each layer of a crystallizer liquid level signal and a bulging frequency capable of locating the bulging; and finally, determining the fluctuation amplitude of a bulging liquid level component, and obtaining bulging deformation according to the fluctuation amplitude. In this method, by means of existing signal detection conditions of a continuous casting site, additional installation of a sensor and a measuring element on an adverse continuous casting site is prevented, the detection principle is clear, maintenance is easy, online prediction of the bulging deformation of a continuous casting billet is achieved, and a reliable means is provided for improving the quality of the casting billet and promoting smooth production and online monitoring of process abnormity.
Inventors:
WANG XUDONG (CN)
DUAN HAIYANG (CN)
YAO MAN (CN)
DUAN HAIYANG (CN)
YAO MAN (CN)
Application Number:
PCT/CN2020/087522
Publication Date:
July 15, 2021
Filing Date:
April 28, 2020
Export Citation:
Assignee:
UNIV DALIAN TECH (CN)
International Classes:
G06F17/10; B22D11/18
Foreign References:
| CN110405173A | 2019-11-05 | |||
| JP2006068747A | 2006-03-16 | |||
| CN107414048A | 2017-12-01 | |||
| CN104275448A | 2015-01-14 | |||
| KR20140025893A | 2014-03-05 |
Other References:
U-SOK YOON, IN-WAN BANG, J. H. RHEE, SEONG-YEON KIM, JOO-DONG LEE, KYU HWAN OH: "Analysis of Mold Level Hunching by Unsteady Bulging during Thin Slab Casting", ISIJ INTERNATIONAL, vol. 42, no. 10, 15 October 2002 (2002-10-15), pages 1103 - 1111, XP055827989, ISSN: 0915-1559, DOI: 10.2355/isijinternational.42.1103
CHENHUI WU, CHENG JI , MIAOYONG ZHU: "Numerical Simulation of Bulging Deformation for Wide-Thick Slab Under Uneven Cooling Conditions", METALLURGICAL AND MATERIALS TRANSACTIONS B, vol. 49, no. 3, 22 February 2018 (2018-02-22), pages 1346 - 1359, XP036493588, ISSN: 1073-5615, DOI: 10.1007/s11663-018-1173-3
CHENHUI WU, CHENG JI , MIAOYONG ZHU: "Numerical Simulation of Bulging Deformation for Wide-Thick Slab Under Uneven Cooling Conditions", METALLURGICAL AND MATERIALS TRANSACTIONS B, vol. 49, no. 3, 22 February 2018 (2018-02-22), pages 1346 - 1359, XP036493588, ISSN: 1073-5615, DOI: 10.1007/s11663-018-1173-3
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