A Calculation Method of Thickness Distribution of Intermediate Billet in Hot Continuous Rolling
A technology of thickness distribution and calculation method, applied in the direction of metal rolling, metal rolling, length measuring device, etc., can solve the problem of inability to obtain the thickness distribution of the intermediate billet
Active Publication Date: 2021-10-22
NORTHEASTERN UNIV LIAONING
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Problems solved by technology
The above method can obtain the average thickness of the intermediate billet, which can provide a reference for the thickness control of the subsequent finish rolling, but cannot obtain the accurate thickness distribution of the intermediate billet along the length direction
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[0041] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.
[0042] In this embodiment, the layout of main equipment and instruments in the rough rolling area of hot continuous rolling is as follows: figure 1 As shown, the rough rolling process with a total of 5 passes is taken as an example for illustration: the rolled piece 3 is pushed out from the heating furnace 1, transported by the conveying roller table 2, rolled by the rough rolling unit 7, and rough rolled The zone rolling mill is provided with a speed sensor 5 and a pressure sensor 6 to measure the roll speed and rolling force respectively, and then pass through a rough rolling process with an odd number of passes (5 passes) in total to obtain an intermediate billet 10; wherein, Odd-numbered rolling direction such as figure 2 As shown, the even-numbered rolling direction is as image 3 Shown; the rough rolling entrance ther...
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The invention discloses a calculation method for the thickness distribution of hot rolling intermediate slabs, which belongs to the technical field of steel rolling automatic control. According to the temperature change of the rolled piece in the rough rolling process, the temperature of the rolled piece is measured by a thermometer, and the temperature change of the rolled piece in the rough rolling process is obtained through calculation of the temperature drop model, and the calculation of each pass of rough rolling is obtained. The temperature distribution at different positions in the length direction of the rolled piece, based on the calibration of the on-line rolling force, and the calculation of the influence of the temperature deviation and the thickness deviation on the thickness of each pass in the rolling process, and finally obtained the middle Thickness distribution along the billet length direction. The method of the invention provides accurate source data for the thickness control of the finish rolling area, and provides good conditions for the high-precision control of the product thickness.
Description
technical field [0001] The invention belongs to the technical field of steel rolling automatic control, and in particular relates to a calculation method for the thickness distribution of hot continuous rolling intermediate slabs. Background technique [0002] In the process of continuous hot rolling, the thickness of the intermediate billet is an important process parameter, and the thickness distribution of the intermediate billet is the premise and basis for the rolling force prediction of the finishing mill and the automatic control of product thickness, which directly affects the thickness accuracy of the final product's full length. Since the thickness of the hot-rolled intermediate slab generally exceeds 35mm, it is difficult to measure it with a conventional X-ray thickness gauge. Therefore, no thickness gauge is installed at the exit of the rough rolling on the hot-rolled production line, resulting in the inability to directly measure the thickness of the intermediat...
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IPC IPC(8): B21B38/04
CPCB21B38/006B21B38/04B21B2038/004
Inventor 彭文万子龙孙丽荣武文腾孙杰丁敬国张殿华
Owner NORTHEASTERN UNIV LIAONING