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Dynamics of Interaction of a Single Fiber with a Headset of a Sampling Drum

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engineering（科研） 2020年第6期12卷 347-355页

作者： Yuldashev Jamshid Umarov Akbarjon Sarimsakov Olimjon namangan institute of engineering and technology Namangan Uzbekistan

The article presents an analysis of the dynamics of interaction of a single fiber with the sampling drum of a headset during pneumomechanical spinning. The regularity is investigated and the equation of the movement of fibers on the surface of the tooth of the sampling drum headset is obtained. It was found that the dependences of the movement of fibers along the tooth at different angles of inclination, the distribution of fiber tension along the arc, and the distribution of fiber speeds in the region of the sampling arc have an increase property. As a result of the analysis of the tension and speed of the fibers, it was found that with the increase in the sampling zone, the tension force and speed of the fiber increase.

关键词： Fibers Sampling Angle Friction Force Friction Speed Radius Fiber Complex

Influence of the Ginning Process on the Quality of Raw Cotton

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engineering（科研） 2021年第12期13卷 739-748页

作者： Mamadaliev Nodirbek Komilov Shukhratjon Akhmedxodjaev Khamit namangan institute of engineering and technology Namangan Uzbekistan

Technological progress consists of the development of improving techniques and technology. It occurs through the creation and implementation of new, more productive, economic and design-perfect machines, mechanisms, apparatus, devices, structures and the development of new technological processes. The direct process of technical progress lies in improving the instrument of labor, which is expressed mainly in increasing the power of the machine, the speed of its operation, improving and simplifying its design, in the transition to more advanced technical connections, as well as automating the control system of the main elements of automatic control systems, is a sensor giving information about the operating mode of technological machines.

关键词： Cotton Saw Gin Feed Rollers Roll Box Seed Roll Productivity Pressure Density Cotton Movement Speed

Determination of the Friction Coefficient in the Flat Strip Drawing Test

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engineering（科研） 2021年第11期13卷 595-604页

作者： Anvar Makhkamov namangan institute of engineering and technology Namangan Uzbekistan

Current work is focused on the influence of friction in deep drawing process. Friction measurements were also conducted using a modified tribotester based on strip sliding between tools. Four different tool surfaces were tested under similar contact conditions regarding contact area, normal pressure, sliding speed, lubricant and surface characteristics to calculate the friction coefficient between the tool surface and a high strength low alloy steel sheet HSLA 380. The results showed that friction coefficient varies over a wide range with different lubricating conditions and different sliding velocities. For some sliding velocities, the coefficient of friction is stable and low, while for others it is unstable and higher. Results of the experiments reveal that this novel tribotester is a very useful tool to evaluate and compare the friction between steel sheet and tool surfaces in alloyed steel for cold working applications. The outcomes have only small dispersion within the different test series, which indicates a stable process with good repeatability. The test method enables comparison of different surface finishes and treatments, lubricants and coatings in terms of friction and galling under conditions similar to those found in sheet metal forming processes. The four different types of surfaces considered for this study were grinded, polished, nitrided and quenched/tempered. The main difference among the tested tools in this work was the surface roughness, which was found to have a strong influence on friction.

关键词： Tribology Friction Roughness Sheet Metal Forming Lubricant Steel Sheet Tool Surface Coefficient of Friction Normal Force Sliding Speed Contact Pressure Strip Drawing Test

Improving Fiber Quality Output by Improving the Roll Box of the Gin Saw

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engineering（科研） 2023年第4期15卷 261-268页

作者： Sarimsakov Akramjon Isroilov Sardorbek Komilov Shukhratjon namangan institute of engineering and technology Namangan Uzbekistan

It has been proven that the increase in the productivity of the gin machine necessarily occurs along with the increase in the density of the raw material. However, with increasing density, productivity increases up to a certain limit, and then productivity begins to decrease. In this article, the authors analyzed the scientific work on improving the quality of fiber.

关键词： Cotton Fiber Saw Gin Density Saw Drum Seed Husk Seed Fluff

Exploring the Efficiency of Experimental Construction of Sorting Ginned Cotton Seed Machine

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engineering（科研） 2021年第1期13卷 18-29页

作者： Avazbek Оbidov Muhiddin Vokhidov Jahongir Abdurahmonov namangan institute of engineering and technology Namangan Uzbekistan

In this paper, research has been conducted to increase the quantity of fiber produced in the enterprise by creating a sorting device for spun seeds, dividing them into fractions by geometric dimensions, and by re-ginning, separating those with long fibers. A new model was developed for geometric sorting of cotton seeds in the harvest, and experiments determined its effectiveness and the optimal values of the factors affecting the efficiency using mathematical modeling. Based on the results of the study, graphs of the influence of factors on device performance and on device efficiency were constructed.

关键词： Cotton Seeds Cotton Fiber Fractions Sorting Machine Short Fiber Air Flow Vibration Machine Vibration Frequency

The Theoretical Studies of the Cultivation of Three Cotton Seeds along the Plain

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engineering（科研） 2018年第8期10卷 514-520页

作者： Obidov Avazbek Sultonov Mirzaolim Muhksinov Ibrohim Abdullaev Shokir namangan institute of engineering and technology Namangan Uzbekistan

As it is known, the main purpose of production of cotton fiber in the technological processes is to produce high quality cotton fiber. Lots of processes in the enterprise have a loss of cotton fiber, which is a valuab... 详细信息

关键词： Cotton Cotton Fiber Lower Seeds Surface Frequency Thickness Corner Separated Coordinate System Vibro-Catcher

Study of Cotton Seeds as a Processing Material

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engineering（科研） 2023年第11期15卷 782-791页

作者： Akhmedxodjayev Khamit Tursunovich Tadjibayev Muhammad Ahmadjanovich Sharipov Khayrullo No’monjanovich Juramirza Abdiramatovich Kayumov Abduraximov Komiljon Karimovich namangan institute of engineering and technology Namangan Uzbekistan

The purpose of this research is to improve the qualitative and quantitative indicators of fiber, lint and seeds by improving the technology of preparing cotton seeds for processing. The state of the seeds after the gin was studied and their division into fractions according to the degree of pubescence was recommended, the probabilities of the seeds emerging from the gin with varying degrees of pubescence were investigated, the geometric sizes and shapes of cotton seeds were studied. It has been established that when seeds come out of gin, they have different pubescence. The conditional movement of seeds without separation from the surface has been determined;found a formula describing the movement of seeds without detaching from the surface;the movement of seeds in a micro-flight is determined;the sizes of the cells of the mesh surface were determined as a function of d_c, α and on the speed of seed movement. The aim of the research work is to increase the yield of cotton fiber by improving the processing technology of germinated seeds, to improve the quality indicators of seeds and lint. In order to achieve this goal, a mesh surface device was created to sort the seeds into fractions. Sorting technology was developed on this device and operating modes were determined. In addition, the law of surface distribution of the fractions separated from the cotton stream moving along the surface of the net was determined, and based on the results of practical and theoretical research, a mode of sorting of cotton seeds was developed.

关键词： Fiber Lint Raw Cotton Ginning Saw Gin Working Chamber Raw Grate Linting Cotton Seeds

Studying the Law of the Movement of Cotton Particle on a Saw Cylinder and the Interaction with Saw Teeth

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engineering（科研） 2019年第10期11卷 717-725页

作者： Jamoliddin Ergashev Khamid Akhmedhodjaev Abdusamat Karimov Juramirza Kayumov Rashida Ergasheva Shohruxmirzo Mahsudov namangan institute of engineering and technology Namangan Uzbekistan

This article investigates the movement trajectory of the cotton particle from Point D of belt transporter of the saw gin camera to Point B of the saw cylinder. In other words, the forces acting on the cotton particle and the equations of their interactions are developed, where, the differential equation of the law of movement of the cotton particle “belt + saw” is made according to the d’Alembert principle. Arc-BD of cotton particle gives the length of the arc of their fall on the saw teeth. The maximum separation of fibers and the quality of separation of fiber from seeds, as well as the time (t) of rapid separation of fiber from seeds, depend on the length of the arc-BD, because the critical length of the arc-BD makes it possible to reduce the multi-layering of the falling cotton particle on the saw teeth. In this scientific research work, patented by the new working camera of the saw gin, the trajectories of the movement of the cotton particles along the arc-DB, as well as the trajectory of the move in the direction of the grate are studied. The results of the study show that the number of fibers increases along the height of the teeth of the saw with one touch. This leads to a decrease in the average stay of seeds in the working chamber of the gin. As a result, the efficiency of the saw gin is increased.

关键词： Cotton Particle Belt Conveyor Saw Cylinder Grate Cotton Seeds Cotton Fiber Net Surface

Influence of the Mode of Discrete Drum Speed and the Number of Inputs on the Technological Parameters of the Yarn Produced

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engineering（科研） 2022年第12期14卷 536-543页

作者： Yuldashev Jamshid namangan institute of engineering and technology Namangan Uzbekistan

This article is devoted to the research work aimed at improving the quality of yarns obtained by pneumomechanical spinning. The yarn quality indicators obtained at different speed modes of the pneumomechanical spinning machine discrete drum were studied and analyzed. The effect of the number of incisions of the sawtooth coatings on the discrete drum on the quality indicators of the yarn produced was also studied. The results of the experiments were analyzed by graphical and histogram methods, and alternative options were suggested.

关键词： Fiber Yarn Discrete Drum Quality Text Toughness Speed