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

Authors

DOI:

https://doi.org/10.15587/1729-4061.2023.277393

Keywords:

roller machine, conveying device, working rolls, leather squeezing, straightening rollers

Abstract

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.

Author Biographies

Gayrat Bahadirov, Institute of Mechanics and Seismic Stability of Structures of the Academy of Sciences of the Republic of Uzbekistan

Doctor of Technical Sciences, Professor

Department of Theory of Mechanisms and Machines

Makhmarajab Musirov, Tashkent State Transport University

PhD

Department of Applied Mechanics

Ayder Nabiev, Institute of Mechanics and Seismic Stability of Structures of the Academy of Sciences of the Republic of Uzbekistan

PhD

Research Laboratory

Department of Theory of Mechanisms and Machines

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

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Published

2023-04-28

How to Cite

Bahadirov, G., Musirov, M., & Nabiev, A. (2023). Determination of rational parameters of a device for leather feeding to the machining area . Eastern-European Journal of Enterprise Technologies, 2(1 (122), 62–72. https://doi.org/10.15587/1729-4061.2023.277393

Issue

Vol. 2 No. 1 (122) (2023): Engineering technological systems

Section

Engineering technological systems

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Copyright (c) 2023 Gayrat Bahadirov, Makhmarajab Musirov, Ayder Nabiev

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