The Results of Research to Determine the Parameters of Hardening Working Area of the Gin and Linter Grates

Agzamov, Mirsolikh; Bakhtiyarovich, Rakhmatov Mashkhur; Agzamov, Mirkhosil

doi:10.30564/jmer.v2i2.1574

Cited by 4 publications

(7 citation statements)

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“…As the test results showed, by hardening the surface of the working area, a surface hardness of up to HRC 55 is achieved, which allows increasing the life of the grates by more than two times. Comparative wear of steel after quenching and cast-iron grates was studied on a special bench installation [6,7]. The research results are shown in the table 1.…”

Section: Methodsmentioning

confidence: 99%

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2022

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Section: Methodsmentioning

confidence: 99%

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2022

EME

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“…The same thickness of the tempered layer it is possible will receive at various specific capacities and durations of heating time t. Therefore on the basis of one size it is impossible to carry out still the choice of the mode of heating under hardening [11].…”

Section: Methodsmentioning

confidence: 99%

“…With an increase in the gap, the number of defects in the cotton fiber increases -fragmentation, debris, the content of skin and broken seeds in the fiber. The main reason for the wear of the side surface of the grate is contact with the saw, which occurs due to inaccuracy in the assembly of the saw grate system [11].…”

Section: Solution To the Problemmentioning

confidence: 99%

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Results of studies on extending the time operation of gin and linter grates

et al. 2021

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Results of studies on extending the time operation of gin and linter grates by hardening of the working area by high-frequency current are given in article. Mathematical models for calculation of key parameters of the mode of hardening of the working area of gin and linter grates are made. As a result of the executed researches the following conclusions are drawn: change of a gap between grates in a grate lattice leads to change of parameters of process of ginning and finally to deterioration of products. Mathematical models for calculations of parameters of process of hardening of the working area of grates are received. On the received mathematical models key parameters of hardening process current of high frequency which have the following values are calculated: depth of the tempered layer – 2.0 mm, the optimum frequency of current – 60000, specific power – 500 W/cm2, hardening time – 10, studying hardness tempered and not tempered sites of grates by method of Rockwell showed increase in hardness of the tempered site to HRC 55 against HRC 45 at not tempered by the working area.

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“…Until now, in domestic practice, gin and linter grates are cast from gray or synthetic cast iron, because they have a complex crosssectional shape and a complex configuration. With this method of production, they have a high labor intensity and naturally have a high cost [7][8][9]. Joint research by specialists from the Uzpakhtasanoat Association and the Russian enterprise CJSC Step-Holding has developed a new method for the manufacture of grates from rolled steel.…”

Section: Introductionmentioning

confidence: 99%