Study of Quenching Device Design Method and Flow Regulation Theory Based on “Solid Contact-Fluid Heat Transfer” Mode

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This paper uses graph theory and Kirchhoff’s law of pipe network to establish a hydraulic calculation model of pipe network. It uses the principle of flow measurement and the rule of loop pressure balancing to address the problems of the uneven surface cooling speed of processed thin plate parts due to unreasonable flow distribution of cooling pipes in the internal pipe network system of quenching device based on “solid contact-fluid heat transfer” mode, which leads to deformation and cracking of parts. The feasibility of applying the established pipe network hydraulic calculation model to the pipe network system of the “solid contact-fluid heat transfer” quenching device for flow control is validated through flow control and data detection and analysis of the actual running pipe network system. Simultaneously, the traditional quenching method is easy to produce large deformation, tedious leveling process, low product qualification rate, and serious environmental severe when processing thin plate parts. The quenching device designed in this paper is to achieve the non-contact quenching between the processed parts and the quenching medium through the heat transfer of the fluid in the cooling pipe. The structure design of the internal cooling channel will directly affect the cooling effect of the sheet metal during the cold quenching, thus determining the microstructure and final performance of the product. Therefore, based on the basic principles of heat transfer and the theory of flow regulation, combined with the traditional design scheme, this paper proposed a practical quenching device design method, established the theoretical model of the cooling waterway structure parameters in the quenching device, and obtained the corresponding relationship between each structural parameter and the number of cooling channels through solving. It provides a reliable research method for the follow-up research on the relationship between cold quenching process parameters, cooling channel structure parameters, and cooling effect of thin plate parts.