DETERMINATION OF THE DISTRIBUTION OF A TEMPERATURE FIELD IN THE INVOLVEMENT OF A STEEL WIRE IN ORDER TO ENSURE THE WORKING CAPACITY AND IMPROVE THE DURABILITY OF THE ROLLER DIE
DOI:
https://doi.org/10.14529/met190108Keywords:
dragging, roller die, temperature distribution, coolingAbstract
This article discusses the temperature field distribution in the roller unit of the die when drawing low carbon steel to determine the efficiency and increase the durability of the node by the method of axial cooling of the roll. A primary model was compiled to determine the amount of heat removed based on the equation of heat flux density, determining the optimal flow parameters of the cooling liquid and the optimal cross-section of the cooling channel depending on the wire size used. According to the results of calculations of the base model, it is possible to draw conclusions about the inoperability of the system due to high temperature stresses and deformations at the contact of the roller and the outer ring of the bearing. However, in the future it is planned to make a more detailed model taking into account the energy-power parameters, the dispersion of heat in the air, as well as the loss of heat by the wire. A project implementation plan is presented, which consists in a theoretical description of the heat distribution process, computer simulation, and a full-scale experiment. Computer modeling is planned to be carried out on the basis of DEFORM 3D and CFdesign software systems. The given programs are distinguished by high accuracy of the results, the values of which are correlated with experimental data. The same program CFdesign allows you to implement the transfer process between the liquid and the cylindrical wall.
However, to confirm the mathematical and computer model, it is necessary to conduct a full-scale experiment on the basis of laboratories “Metal Forming” of Nosov Magnitogorsk State Technical University and laboratories “Innovative methods of metal forming” of South Ural State University (NRU). The experiment will be carried out on a roller dredge BP-180, which is due to a rather convenient design and economic feasibility of testing.
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