Modeling the contact curves of leather squeezing machines

Хуррамов, Ш.Р.; Khalturaev, F. S.; Kurbanova, Feruza

doi:10.1088/1742-6596/2373/7/072002

Cited by 15 publications

(19 citation statements)

References 9 publications

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“…In the compression zone, the contact of the strip of processed material with the elastic coatings of the rollers occurs in a short period. Therefore, 1 k can be considered a constant.…”

Section: Resultsmentioning

confidence: 99%

“…The deformation properties of the processed material in the roll module are characterized by the compression curve during interaction with the roller coating and the line determining the recovery of its deformation (shape) [1]. When the material is compressed, the dependence of deformation on load is nonlinear.…”

Section: Resultsmentioning

confidence: 99%

“…In [10][11][12][13]17,[32][33][34][35][36][37], the analytical description of the contact shape of the roll module is associated with a power-law empirical relationship between the stress and strain of the materials of contacting bodies, obtained experimentally.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Shape of contact between deformable material and elastic rollers

Khurramov,

Sattorova,

Turdibekova

et al. 2024

E3S Web of Conf.

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The study is devoted to the analysis of the contact shape in a symmetrical roll module for the case when changes in the thickness of the material and the roller coating at each point of the contact zone occur in the vertical direction of the strip of material. A mathematical model of the shape of contact between a deformable material and elastic rollers is developed. Particular types of mathematical models of the contact shape are obtained in cases where the material being processed is absolutely elastic, elasticviscous, and plastic. It was revealed that the shape of the contact depends primarily on the geometric and deformation properties of the strip of material being processed and the roller coating, and the deformation rate.

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“…In the compression zone, the contact of the strip of processed material with the elastic coatings of the rollers occurs in a short period. Therefore, 1 k can be considered a constant.…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Shape of contact between deformable material and elastic rollers

Khurramov,

Sattorova,

Turdibekova

et al. 2024

E3S Web of Conf.

View full text Add to dashboard Cite

show abstract

“…Therefore, the contact curve of each roll consists of compression and recovery zones, separated by a point that determines the maximum compression of the interacting bodies. Under static interaction, the point of maximum compression lies on the line of centers [14]. Under roller rotation, this point is shifted from the line of centers towards the supply of the processed material into the contact zone [21].…”

Section: Methodsmentioning

confidence: 99%

“…The main task when considering the contact interaction of rolls with the processed material is to determine the stressstrain state in the technological zone and, first, the laws of stress distribution (normal and shear) in the contact zone, which is decisive for finding indices that characterize the roll module and technological process. Despite the extensive material on the study of the contact interaction in roll modules [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20], its theoretical foundations have not yet been sufficiently developed, and the main and most in-depth studies were conducted only for the case of metal rolling [1][2][3][4][5][6][7][8][9][10][11][12]. The most complex issue of stress distribution in the contact zone of the roll module, with the rollers covered with elastic coatings, has not been developed.…”

Section: Introductionmentioning

confidence: 99%

Study on modeling of contact interaction in roll modules

Khurramov,

Toshkhujaev,

Saidakhmedov

2024

E3S Web Conf.

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The main problem of the mechanics of contact interaction in roll modules is to determine the stress-strain state in the technological zone. The article presents mathematical models of the laws of distribution of contact stresses and analytical dependencies of their main indices, which make it possible to calculate the power parameters of roll modules of technological machines. When developing mathematical models, empirical formulas for the laws of distribution of normal stresses along roll contact curves and a friction stress model were used, considering the effect of external forces, roll drive, and compliance of the roll coating on the distribution of shear stresses. It is shown that normal stresses in the compression zone increase from zero to the maximum value by the harmonic law, and in the recovery zone, they decrease from the maximum value to zero by the parabolic law. It was revealed that in the driven roll, the neutral point is located on the left side of the point of maximum normal stress, and the points that determine the maximum normal stress and compression of the interacting bodies coincide and are shifted from the line of centers towards the supply of the processed material into the contact zone.

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Study on the conditions of material capture by pairs of rolls of squeezing machines

Turgunov,

Abdullaev

2023

E3S Web Conf.

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This paper is devoted to the analysis of the condition for material capture with pairs of rolls of squeezing machines. Calculation formulas for the parameters of roll pairs of squeezing machines are given, such as: contact angles, minimum distance between the rolls, the thickness of the processed material after squeezing. It has been established that the capture of material in the roll pairs of squeezing machines is determined by the center distance between the rolls, the thickness of the processed material and the coefficients of friction of the rolls on the processed material. It was determined that the displacement of the upper roll relative to the lower roll does not affect the values the nip angles.

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Modeling the contact curves of leather squeezing machines

Cited by 15 publications

References 9 publications

Shape of contact between deformable material and elastic rollers

Shape of contact between deformable material and elastic rollers

Study on modeling of contact interaction in roll modules

Study on the conditions of material capture by pairs of rolls of squeezing machines

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