Determination method of production technology parameter of external cooling water in middle-plate hot leveller
A technology of production process and determination method, which is applied in the field of determination of process parameters of external cooling water of medium-plate hot straightening machine, can solve problems such as inability to accurately determine process parameters, achieve convenient operation, improve service performance and life, and improve quality Effect
Inactive Publication Date: 2010-04-28
NANJING IRON & STEEL CO LTD
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Problems solved by technology
[0003] In order to overcome the inadequacy that the process parameters of the external cooling water of the existing heat straightening machine cannot be accurately determined, the purpose of the present invention is to provide a method for determining the process parameters of the external cooling water of the medium plate heat leveling machine. Uncertainty and unreliability, prolong the service life of straightening rollers, and improve the quality of thermal straightening of steel plates
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[0016] A method for determining the production process parameters of the external cooling water of a medium-plate thermal straightening machine, characterized in that the method determines the production process parameters of the external cooling water according to the heat-fluid-solid coupling dynamics, see figure 1 , including the following steps:
[0017] (1) Establish the heat-air-water mixed exchange model HAWT between the external cooling water and the steel plate, straightening roller and external field space; this model includes the vaporization process of the external cooling water on the straightening roller and the steel plate, the mixing of water liquid and steam Flow process, steel plate heat radiation heating process of water and steam.
[0018] (2) Establish the heat-fluid-solid structure model WSPA of the external cooling water, straightening rollers, steel plates and the external air field; Calculation of solid heat transfer for straightening rollers, calcula...
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The invention discloses a determination method of production technology parameter of external cooling water in a middle-plate hot leveller, comprising the following steps: building a heat-gas-water mixed exchange model; building a heat-flow-solid structural model; pre-inputting the production technology parameter of external cooling water; determining external cooling water behaviour and the heat exchange flow field parameter of external cooling water, steel plates and levelling rolls; calculating steel plate rectified temperature distribution and levelling roll surface temperature distribution; adjusting external cooling water parameter in a recursion mode until the external cooling water parameter satisfies the temperature of levelling roll surface by production technology; and finally determining the production technology parameter of external cooling water. The invention adopts a fluid-solid-heat coupling dynamic method to determine the production technology parameter of external cooling water in a middle-plate hot leveller, thus avoiding irrationality of the artificial experience method; the technological parameter can be designed from the stage of designing the leveller; and according to the change of production working condition, the invention reasonably adjusts nozzle on-and-off amount as well as water spraying pressure and flow so as to effectively control the surface working temperature of the levelling rolls.
Description
technical field [0001] The invention relates to a method for determining a production process of thermal straightening of steel plates, in particular to a method for determining process parameters of cooling water outside a medium plate thermal straightening machine. Background technique [0002] The reasonable determination of the production process parameters of the external cooling water for hot straightening of the medium plate has a significant impact on the service life of the straightening rollers of the straightening machine and the straightening quality of the steel plate. At present, the production process parameters of the heat straightening of the medium plate, including the design of the main process parameters such as the number of water distribution pipes, the arrangement of the water pipes, the pipe diameter, the flow rate of the water, the pressure and speed of the external cooling water, etc., are all based on manual production experience. Definitely, the r...
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IPC IPC(8): B21D1/02
Inventor 廖仕军俞美萍陈凯
Owner NANJING IRON & STEEL CO LTD
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