Electric Motors Power Modes at Synchronization of Roughing Rolling Stands of Hot Strip Mill

Kurpe, Oleksandr; Kukhar, Volodymyr; Puzyr, Ruslan; Burko, Vadym; Balalayeva, Elena; Klimov, Eduard

doi:10.1109/paep49887.2020.9240818

Cited by 27 publications

(11 citation statements)

References 42 publications

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“…To maximize wear resistance under conditions of shock-abrasive wear, it is necessary to minimize the mass wear [17,18], which after minor transformations is reduced to the form:…”

Section: Resultsmentioning

confidence: 99%

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Optimization of the combined explosion hardening processes

et al. 2021

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The proposed method for calculating the loading parameters makes it possible to determine the wear parameters after explosion hardening. The calculation method is simple and less time consuming compared with calculation methods that involve the use of nonlinear programming methods. The main methods of increasing the wear resistance of mining equipment parts using explosion methods are generalized. The reserve for increasing the wear resistance consists in the optimization of deformation parameters during the power and thermal intensification of processes and the development of new methods and technologies of hardening. The factors (parameters) of the studied processes: explosive cladding, alloying, hardening, are formulated. Optimization of the processes under consideration is possible by decomposing the process into simpler ones with subsequent optimization of the parameters of these processes and the synthesis of the obtained solutions. For the first time, a solution to the multicriteria problem of two-stage explosion hardening is presented. It is proposed to split the process into simpler ones. Optimization criteria are proposed for each of the simplified processes. The problem is reduced to a conditional extremum problem, which is solved by composing the Lagrange function. By transforming the wear equation, the optimal ratio of strength and ductility for parts operating under abrasive wear conditions is determined.

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“…To maximize wear resistance under conditions of shock-abrasive wear, it is necessary to minimize the mass wear [17,18], which after minor transformations is reduced to the form:…”

Section: Resultsmentioning

confidence: 99%

“…Optimization of the analyzed processes by theoretical analysis of numerical modeling is possible using the calculation method described in [17,18]. The latter includes a set of models that characterize the properties of the original blanks and the evolution of these properties during processing and operation.…”

Section: Methodsmentioning

confidence: 99%

Optimization of the combined explosion hardening processes

et al. 2021

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“…In this paper [7], considerable attention is paid to increasing the energy efficiency of rolling on tandem mills 1700 (in relation to the conditions of PJSC "Iron and Steel Works of Mariupol"). Through industrial rolling mills, it has been shown that the use of lubricants has an effect on the synchronization of the stands and on the power modes of rolling mills, which reduces the consumption of electricity during mill rolling by 1-6%.…”

Section: Literature Reviewmentioning

confidence: 99%

“…Through industrial rolling mills, it has been shown that the use of lubricants has an effect on the synchronization of the stands and on the power modes of rolling mills, which reduces the consumption of electricity during mill rolling by 1-6%. In tandem rolling mills, the modes of operation of electric motors of the stands must be synchronized [7] taking into account deformation phenomena (different hoods on the stands, heating-cooling during rolling, etc. ), which affects quality indicators and electricity consumption.…”

Section: Literature Reviewmentioning

confidence: 99%

Influence of emulsols type on energy-power consumption and surface contamination at DC01 steel cold rolling on the continuous four-stand mill

Kukhar

Malii

Spichak

2022

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The article presents the results of experimental and industrial tests of physical and chemical parameters of the experimental emulsol "Quakerol". According to the physicochemical parameters the experimental emulsol "Quakerol" differs from the used emulsol "Universal-1TS" by higher lubricating properties. Operating modes of stand and coiler electric motors of tandem mill at rolling of melts from experimental emulsol "Quakerol" lubricated with emulsol "Quakerol" and serial emulsol "Universal-1ТС" lubricated with conservation oil "OK-2" at LPTs were analyzed. The results of analysis of loads at rolling of strips with 0.68×1000 mm cross-section from pre-rolled sheet with thickness of 3.0 mm showed that the values of average total loads on stand motors and coiler of four-stand mill 1680 were higher when using experimental emulsol "Quakerol". The comparative analysis of experimentally obtained data on influence of technological conditions of cold-rolled coils production at four-stand continuous tandem mill 1680 with using emulsols "Quakerol" and "Universal-1TS" on rolling power parameters, power consumption and contamination of DC01 flat carbon steel surface is presented. Multiple regression equations were obtained to describe power consumption during rolling using different emulsions, the values of cross-sectional area were taken as a varying factor. Specific power consumption and average total load on stands and coiler motors during rolling with the use of emulsion prepared from experimental emulsion "Quakerol" and emulsion prepared from standard emulsion "Universal-1TS" were estimated. The reasons of higher specific power consumption during LCL operation with the experimental emulsion were analyzed. A quantitative assessment of contamination of the surface of steel samples using the experimental emulsion "Quakerol", oil "OK-2" and standard emulsion "Universal-1TS" is given. The necessity of further tests to determine the optimal concentration of emulsion from "Quakerol" to ensure the reduction of energy costs per ton of cold rolled steel has been substantiated. The practical significance of the work lies in the development of methods for analysis of lubricants with regard to the prospects of using "Quakerol" emulsion instead of "Universal-1TS" emulsion in order to improve the quality and increase the productivity of the cold-rolling shop

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“…A solution to equation ( 1) is to be found relative to the meridional effort since it is these forces that determine the stability of the deformation process and the necessary load on the press. We differentiate the equilibrium condition (1), exclude the momentum and the circumferential force, by substituting (2) into it, to obtain: Hence, by virtue of the fact that у 1 (х) is the solution to equation (4), we obtain: A particular solution for meridional efforts was obtained earlier by the authors of [52,53] under the assumption the deformation of a workpiece is moment-free. It takes the form:…”

Section: Solving a Differential Equilibrium Equation By Direct Integrationmentioning

confidence: 99%

Improving the technology for manufacturing hollow cylindrical parts for vehicles by refining technological estimation dependences

Puzyr

Shchetynin

Vorobyov

et al. 2021

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This paper shows that the technological preparation of production accounts for 20‒70 % of the total labor intensity of technical preparation. An important role belongs to the applied programs of finite-element modeling. However, such software packages often cannot be purchased by small-scale industrial enterprises for various reasons. Therefore, special empirical and analytical calculation models are used, which have proved to be quite effective in typical metal processing processes. Drawing a cylindrical hollow part was used as an example of the improved analytical dependence to calculate meridional tensile stresses. Existing analytical models of the process accounted for the bending moment through additional stresses. However, this approach only roughly described the deformation process. It was possible to refine the existing analytical dependences by introducing a term into the differential equilibrium equations that takes into consideration the bending moment that acts in the meridional direction when a workpiece passes the rounding on the matrix edge. Analysis of the obtained expression revealed that the bending of a workpiece gives rise to the stretching meridional stresses, which depend on the ratio of the squares of the thickness of the workpiece and the radius of the matrix rounding. The results of the estimation data from the numerical and theoretical models coincided for small values of the radius of the matrix rounding of 1‒2 mm, which confirms the adequacy of the analytical solution. In the numerical model, there is an extreme point where the tensile stresses have a minimum and, after it, begin to increase; this corresponds to the matrix rounding radius of 5 mm

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Electric Motors Power Modes at Synchronization of Roughing Rolling Stands of Hot Strip Mill

Cited by 27 publications

References 42 publications

Optimization of the combined explosion hardening processes

Optimization of the combined explosion hardening processes

Influence of emulsols type on energy-power consumption and surface contamination at DC01 steel cold rolling on the continuous four-stand mill

Improving the technology for manufacturing hollow cylindrical parts for vehicles by refining technological estimation dependences

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