Procedure and algorithms for the energy-force calculation of cold rolling allowing for the number of neutral sections in the deformation zone

Garber, E. A.; Shalaevskii, D. L.; Кожевникова, И. А.; Traino, A. I.

doi:10.1134/s0036029508040083

Cited by 4 publications

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 3 presents the results of the heat calculation of the rolling regime that was performed using the technique [2] developed specially for a reversing mill. Here, t swi and t ri are the strip temperatures in the swift and the reel in the ith pass, respectively; t s(i -1) and t si are the strip temperatures at the entrance in the defor mation zone in the ith pass and at the exit from it, respectively; t w and t b are the temperatures (averaged, quasi stationary) of the work and backup rolls in the ith pass, respectively; and t rol1 and t rol2 are the temper atures (quasi stationary) of the backup rolls located between the swift and the stand and between the reel and the stand.…”

Section: Optimization Of the Technological And Thermal Conditions In mentioning

confidence: 99%

“…This condition is the main cause of joining technological, energy-force, and heat calculations into one mathematical model. The main principle of minimizing the energy in cold rolling that was earlier used in continuous mills is as follows [1][2][3]:…”

mentioning

confidence: 99%

“…Therefore, the methods of energy saving developed for continuous mills can only be partly applied to reversing mills [1][2][3].…”

mentioning

confidence: 99%

See 2 more Smart Citations

Optimization of the technological and thermal conditions in a reversing cold rolling mill

et al. 2015

Self Cite

View full text Add to dashboard Cite

Most available results of investigations and devel opment that deal with improving the process of cold rolling of thin strips belong to continuous multistand mills. However, some metallurgical enterprises in Rus sia have recently put into operation new reversing mills to produce cold rolled strips of a narrow grade range, such as electric steel strips (in particular, high mag netic permeability steel strips). The strips made of such steels are characterized by specific magnetic properties and high plastic deformation resistance, which is threefold that of conventional carbon steels.Metallurgists in some metallurgical enterprises, where only plate multistand mills are operative, think about putting into operation reversing mills, since the use of a reversing mill is economically efficient at an annual output of 500-550 ths t of a certain grade range specified by the market requirements. The use of a reversing mill substantially decreases the capital expenditure and operating costs related to mainte nance and depreciation of equipment.As for the economy of energy, this problem needs a special consideration, since the technological schemes, the equipment arrangement, and the operat ing conditions of reversing and continuous mills are substantially different. Therefore, the methods of energy saving developed for continuous mills can only be partly applied to reversing mills [1][2][3].The purpose of this work is to develop a technique for calculating energy effective conditions for cold rolling of thin steel strips in a reversing mill. This tech nique is based on the mathematical model of interre lated technological, energy-force, and thermal parameters of a reversing mill [4,5]. To illustrate this technique, we chose the conditions of rolling of strips made of a high magnetic permeability transformer steel. The following condition must be met to ensure the given magnetic properties: the strip temperature at the exit from the deformation zone in the two-three last passes should be 180-220°C. This condition is the main cause of joining technological, energy-force, and heat calculations into one mathematical model. The main principle of minimizing the energy in cold rolling that was earlier used in continuous mills is as follows [1-3]:(i) At a given total reduction (which is determined by the difference between the thicknesses of hot rolled semiproducts and a ready cold rolled sheet), the par tial reductions are varied and redistributed between mill stands so that the maximum possible reductions are in the first stands, where the metal has the mini mum yield strength, and the minimum reductions are in the last stands, where the yield strength is maximal because of work hardening.(ii) The forward pull of a strip is increased in each stand to the values that exclude its break in rolling. As a result, the main drive of a working stand is unloaded, and the effect is higher than the additional energy con sumption in the drive that appears in the next stand or a reel.The algorithm of optimizing the cold rolling condi tions us...

show abstract

Section: Optimization Of the Technological And Thermal Conditions In mentioning

confidence: 99%

mentioning

confidence: 99%

See 1 more Smart Citation

Optimization of the technological and thermal conditions in a reversing cold rolling mill

et al. 2015

Self Cite

View full text Add to dashboard Cite

show abstract

“…A number of articles connected with identification of neutral section dimensions and position can be distinguished [23][24][25][26][27][28] among studies dedicated to strip rolling processes,. Neutral line dimensions and position detection is, definitely, important objective because neutral angle is one of the key parameters while estimation of deformation zone parameters at rolling [29].…”

Section: Introductionmentioning

confidence: 99%

Comparative evaluation of the kinematic parameters at symmetric and asymmetric cold rolling of strip using computer simulation

Кожевников¹,

Skripalenko²,

Кожевникова³

et al. 2023

cisisr

View full text Add to dashboard Cite

Computer simulation of symmetric and asymmetriс cold rolling of AISI-1008 steel strip in three passes was carried out. DEFORM finite element method (FEM) software was used for computer simulation. Technique allowing neutral line location determination was designed and this technique is based on the processing of FEM computer simulation results. Neutral line location during each of three passes at different working roll diameters combinations (symmetric rolling, rolling with 0.83 %, 1.67 % and 5 % working rolls diameters asymmetry) was detected using designed technique. It was established that working rolls diameters asymmetry increase till 5 % moves the middle of the neutral line towards rolling direction in 0.250 mm for the first pass, 0.199 mm -for the second pass, 0.133 mm -for the third pass. That is, influence of working rolls diameters asymmetry increase becomes weaker with the decrease of absolute value of height reduction. Three-dimensional graphs were made: one is illustrating dependence of position of the neutral line's midpoint from rolling speed and working rolls diameters asymmetry and the other one is illustrating dependence of the neutral line inclination angle from rolling speed and working rolls diameters asymmetry. Weak direct correlation between working rolls diameters asymmetry and position of neutral line's middle point and strong direct correlation between rolling speed and position of neutral line's middle point were detected. Velocity diagrams along vertical lines in lag zone and lead zone of the deformation zone at asymmetric rolling show that velocity at point of contact of upper roll and strip is less than velocity at point of contact of lower roll and strip.

show abstract

Simulation of cold rolling and skin rolling of strips in the deformation zone consisting only of a forward slip zone

2012

View full text Add to dashboard Cite

Procedure and algorithms for the energy-force calculation of cold rolling allowing for the number of neutral sections in the deformation zone

Cited by 4 publications

References 2 publications

Optimization of the technological and thermal conditions in a reversing cold rolling mill

Optimization of the technological and thermal conditions in a reversing cold rolling mill

Comparative evaluation of the kinematic parameters at symmetric and asymmetric cold rolling of strip using computer simulation

Simulation of cold rolling and skin rolling of strips in the deformation zone consisting only of a forward slip zone

Contact Info

Product

Resources

About