Procedure for selecting a rational technological mode for the processing of cast iron melt on the basis of graph-analytical processing of the data of serial smeltings

Nikolaiev, Denys

doi:10.21303/2313-8416.2022.002774

Cited by 2 publications

(2 citation statements)

References 9 publications

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“…By selecting the optimal combinations of alloying elements, it becomes possible to improve the mechanical characteristics of cast iron [15,16]. This forms rational technological modes of processing the cast iron melt outside the furnace [17], which have the potential for optimization. For such optimization, mathematical models of the «composition-properties» type are built [18], choosing as an optimization criterion the one that is the most important from the point of view of operational requirements -for parts of internal combustion engines [19], mixer blades and other mechanical engineering parts [20][21][22].…”

Section: Engineeringmentioning

confidence: 99%

Experimental and industrial method of synthesis of optimal control of the temperature region of cupola melting

Demin¹

2023

Eureka: PE

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The object of research is the temperature regime of melting in a cupola. The synthesis of optimal control of such an object is associated with the presence of a problem consisting in the complexity of its mathematical description and the absence of procedures that allow one to obtain optimal control laws. These problems are due to the presence of links with a pure delay, non-additive random drift, and difficulties in controlling the process parameters, in particular, accurately determining the temperature profile along the horizons and the periphery of the working space of the cupola. The proposed conceptual solution for the synthesis of optimal temperature control allows the use of two levels of control: the level controller solves the problem of maintaining the constant height of the idle charge, and the problem of increasing the temperature of cast iron is solved by controlling the air supply to the tuyere box. It is shown that the problem of regulating the upper level of an idle charge can be solved by reducing the model of the regulation process to a typical form, followed by the use of the Pontryagin maximum principle. A procedure for the synthesis of optimal air flow control is proposed, which makes it possible to obtain the temperature regime control law on the basis of experimental industrial studies preceding the synthesis process. This takes into account the time delay between the impact on the object and its reaction, which makes it possible to predict the temperature value one step acharge, equal to the time interval during which the lower surface of the fuel charge reaches the upper surface of the level of the idle charge. A procedure for temperature profile control based on the use of D-optimal plans for selecting sensor installation points is proposed. Due to this, it becomes possible to determine the temperature profile of the cupola according to its horizons and the periphery of the working space of the cupola with maximum accuracy. The proposed synthesis method can be used in iron foundries equipped with cupolas, as it is a tool for studying a real production process, taking into account its specific conditions. This will allow developing or improving control systems for cupola melting, implementing different control modes: manual, automated or automatic

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Section: Engineeringmentioning

confidence: 99%

Experimental and industrial method of synthesis of optimal control of the temperature region of cupola melting

Demin¹

2023

Eureka: PE

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“…It is possible to use technological methods of combining modification with alloying [17][18][19], which results in an increase in the mechanical properties of cast iron [20,21]. Such operations can be carried out at the stage of out-of-furnace processing of the alloy [22], and the choice of specific modes is carried out on the basis of mathematical models of the "composition -properties" type [23]. Such optimal or rational solutions in the technology of melt and after-furnace processing form the metallurgical component of the quality of castings.…”

Section: Introduction the Object Of Researchmentioning

confidence: 99%

Improving technology for manufacturing casting case of truck clutch release cylinder

Demin

2023

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The object of research: Manufacturing technology of body castings for trucks using the example of a clutch release cylinder body made of gray cast iron with flake graphite EN-GJL-200. Investigated problem: Finding ways to reduce the weight and size characteristics of cast parts. The main scientific results: A mathematical model has been developed that has made it possible to determine the optimal compositions of alloying Cr/Ni – Cu/Ti complexes that ensure an increase in the grade of cast iron by increasing the tensile strength at elevated carbon contents. This makes it possible in the future to reduce the thickness of the walls of the castings, achieving a reduction in their weight and size characteristics The area of practical use of the results of the study: Automotive industry in terms of technology for manufacturing cast parts for trucks Innovative technological product: Improved technology for manufacturing the clutch release cylinder body due to optimization of melt technology and out-of-furnace processing allows for targeted selection of melt processing modes, ensuring an increase in the strength characteristics of cast iron for cast body parts, thereby moving from the EN-GJL-200 cast iron grade to the EN grade -GJL-250 and EN-GJL-300. The scope of the innovative technological product: Foundries of engineering enterprises, in particular those producing trucks, in which iron castings are produced

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Procedure for selecting a rational technological mode for the processing of cast iron melt on the basis of graph-analytical processing of the data of serial smeltings

Cited by 2 publications

References 9 publications

Experimental and industrial method of synthesis of optimal control of the temperature region of cupola melting

Experimental and industrial method of synthesis of optimal control of the temperature region of cupola melting

Improving technology for manufacturing casting case of truck clutch release cylinder

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