Conditions for vertical pulling of semi-finished leather products under driving rollers

Nabiev, Ayder; Tsoy, Gerasim; Bahadirov, Gayrat

doi:10.1051/e3sconf/202337601073

Cited by 8 publications

(1 citation statement)

References 17 publications

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“…In [6] the conditions for vertical transportation of the skin to the treatment area were studied. The conditions for capturing the skin by rotating working shafts in the zones of initial contact, the setting process, and the exit from contact are determined.…”

Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determination of rational parameters of a device for leather feeding to the machining area

Bahadirov

Musirov

Nabiev

2023

EEJET

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The quality of mechanical processing of the skin largely depends on the parameters of the skin feeding to the processing zone between the working rolls. The processed material at the entrance to the processing zone must be free of folds and wrinkles, i.e. one layer of material should enter the processing zone of the working rolls. Therefore, the input of the processed material into the zone of the working rolls is ensured with a rational selection of the profile of the guiding device for feeding the skin into the processing zone. A mathematical model was developed that allows the authors to determine the profile of the guiding device for leather feeding into the processing area between the working rollers, considering the modulus of elasticity and the density of the material being processed. The graphical solution to the mathematical model of the guiding device profile was made by a numerical method, and in order to prevent the leather saturated with liquid from sticking to the guiding surface, the friction coefficient was replaced with the rolling friction coefficient, and the rollers of the guiding device were placed at a certain angle to level out the folds of the leather and smoothly feed it to the processing area. A new design of roller technological machines was manufactured in laboratory settings. The roller machine is equipped with a new guiding device using rollers, with the possibility of free rotation around its axis. The rollers can be placed in several rows in a staggered arrangement. The developed design of the guiding device, due to the installation of the rollers at a certain angle relative to the direction of skin feed, makes it possible to smoothly transport the treated skin while eliminating longitudinal and transverse folds. The elimination of wrinkles contributed to an increase in the usable area of the treated leather samples. Experimental and testing work was conducted on a roller squeezing machine for processing leather samples using a new design of guiding device. The working width of the guiding device was 1500 mm, and the rollers of a diameter of 30 mm, allowed the straightening of the folds of the leather and moving it to the gripping zone of the working rollers. In the experimental study, the second-order D-optimal planning method was used with the Kano design matrix.

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Section: Literature Review and Problem Statementmentioning

confidence: 99%

Determination of rational parameters of a device for leather feeding to the machining area

Bahadirov

Musirov

Nabiev

2023

EEJET

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Refined model of leather

Bahadirov,

Nabiev,

Tsoy

2024

BIO Web Conf.

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The structure of finished leather and semi-finished products differ in physical and mechanical parameters. To obtain the properties of elasticity, pliability, and viscosity required in leather production, it is necessary to ensure their values that guarantee the high quality of the resulting product. In this article, a model for finished leather is obtained based on combining the viscoelastic Kelvin model with the deformationinert Khusanov model and the Bingham–Shvedov viscoplastic model. This model makes it possible to improve the elastic-viscous plastic deformation of a fibrous material (leather). The possibility of clarifying the pattern of change in the deformation curve depending on the time the fibrous material is loaded by a certain force was explored. The aim of refining the deformation curve is that in known models, at the initial moment of loading, deformation occurs instantly up to a certain value, which does not fully describe the real physical process of deformation of the material. Consequently, in the proposed refined model, the deformation is fixedat zero value, which provides a real physical pattern of deformation of the fibrous material. The refined model will serve designers of technological machines to develop parameters of deformation during the mechanical processing of elastic-viscous plastic materials.

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Improvement of quality indices of leather fabrics of fur skins

Bahadirov,

Nabiev,

Tsoy

2024

BIO Web Conf.

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The article is devoted to research on improving the quality indices and elastic-plastic properties of leather fabric of fur skins. An improved method and operative parts were developed that help ensure high elastic-plastic properties of leather fabrics of fur skins after mechanical processing. The design and geometric parameters of the operative parts of the improved design were studied and analyzed. It was determined that when using the recommended operative parts, the required quality of leather fabrics of fur skins is achieved by increasing the contact points between the operative parts and the processed material.

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Conditions for vertical pulling of semi-finished leather products under driving rollers

Cited by 8 publications

References 17 publications

Determination of rational parameters of a device for leather feeding to the machining area

Determination of rational parameters of a device for leather feeding to the machining area

Refined model of leather

Improvement of quality indices of leather fabrics of fur skins

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