The Research of the Rolling Speed Influence on the Mechanism of Strip Breaks in the Steel Rolling Process

Rusňák, J.; Malega, Peter; Svetlík, Jozef; Rudy, Vladimír; Šmajda, Norbert

doi:10.3390/ma13163509

Cited by 14 publications

(4 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…They can be caused by improper handling or defects during the transport of material [17]. Other errors include the effects of ambient temperature, energy supply effects, line downtime, humidity, aggressive environment, or human factors [18]. In the case of rolled foreign material, it is difficult to determine which category it clearly belongs to.…”

Section: Methodsmentioning

confidence: 99%

Improving Quality in the Process of Hot Rolling of Steel Sheets

2021

View full text Add to dashboard Cite

The hot rolling of steel sheets is a highly energy-intensive process. There are technical and operational issues associated with this process, and the causes of these issues can be various. This study involved analysis of one issue that has a great influence on the resulting surface quality of rolled sheet metal: rolled foreign material. After the sheet cools, rolled foreign material tends to fall off and a hole then remain on the surface of the sheet. This paper focuses on the search for the root causes of the occurrence of foreign material rolling. The basic categorization of the causes of this issue was performed by experienced long-term operators. The 4M method (man, machine, method, and material) was used to categorize the causes. Pairwise comparison was used to verify the result. Using energy dispersive spectroscopy analysis, the origin of the foreign material was identified. The analysis confirmed that the foreign material was not derived from the primary material. Further research showed that the cause of the issue was the guide rulers, which are a structural part of the rolling mill. Measures were taken to significantly reduce the incidence of the problem, which also had the effect of reducing financial losses, which fell by a third in 18 weeks. In the future, it will be necessary to make design changes (modernization of the rolling mill), which will, however, require more financial investment.

show abstract

Section: Methodsmentioning

confidence: 99%

Improving Quality in the Process of Hot Rolling of Steel Sheets

2021

View full text Add to dashboard Cite

show abstract

“…Yang et al [ 4 ] established a dynamic model of a rotor-bearing-casing system with a nonlinear rolling element bearing and studied the performance of rolling element bearing faults. Rusnak et al [ 5 ] studied the nonlinear dynamics models of roll from various angles and achieved outstanding results. Liu et al [ 6 ] deduced the friction between the roller and the strip, the torsional vibration of the gear pair and the horizontal vibration of the roller, and the dynamical equation of a horizontal–torsional coupled main drive system of a rolling mill.…”

Section: Introductionmentioning

confidence: 99%

Research on Dynamic Characteristics of the RBBH System Based on Dynamics Model and Vibration Data Fusion

Lin

Sun

Chen

et al. 2022

Sensors

View full text Add to dashboard Cite

The roll-bearing-bearing housing (RBBH) system is one of the most common kernel structures used to determine strip mill stability and product surface quality in modern metallurgical machinery. To better understand dynamic characteristics of the RBBH system, this paper provides a nonlinear dynamic model and designs an engineering test platform on the RBBH system in the whole rolling process. First, a nonlinear dynamic model of the RBBH system supported by four-row rolling bearings under high speed and heavy load is established. Then, the method of combining Riccati transfer matrix and Newmark-β numerical integration is employed to solve nonlinear dynamic equations. After that, the engineering test platform is designed and assembled to capture and analyze the vibration signals of weathering steel (SPA-H) with finished thicknesses of 1.6 and 3.2 mm. Finally, the dynamic characteristics of the RBBH system are studied with the method of the dynamic model and vibration data fusion. The results show that the SPA-H with a finished thickness of 1.6 mm is rolled, the RBBH system fluctuates violently in both horizontal and vertical directions, and numerical results are highly consistent with experimental results in acceleration response, velocity response, and displacement response. In addition, the dynamic performance parameters of the four-row rolling bearing will also fluctuate greatly. Finally, there is significant interest to gain the benefits for the RBBH system design and mill stable rolling purposes.

show abstract

“…• Stopping an industrial process: this involves a lot of material wastage and revenue loss [9,10]. Moreover, the actual boundary conditions at a certain time or location of microstructure are not exactly known.…”

Section: Introductionmentioning

confidence: 99%