Method for controlling middle waves in strip penetrating process of finishing mill frames
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A technology of intermediate wave and finishing mill, applied in the field of steel rolling, can solve the problems of intermediate wave and proportional crown mismatch, and achieve the effect of reducing production cost, optimizing use method and increasing profit
Active Publication Date: 2014-05-28
首钢股份公司迁安钢铁公司
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[0003] The technical problem to be solved by the present invention is to provide a method for controlling the middle wave of the strip threading of the finishing rolling stand, which solves the problem of the middle wave during the strip threading between the strip steel stands caused by the mismatch of the proportional convexity of each stand in the prior art. technical problem
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Embodiment 1
[0024] Step 201: In the embodiment of the present invention, the actual roll wear amounts of the F1-F7 stands are respectively measured by a roll grinder, and the actual wear amounts of the F1-F7 stands are respectively obtained;
[0025] Wherein, in the embodiment of the present invention, the measuring method of grinding machine is:
[0026] The wear data of the roll is the diameter of the upper machine of the roll minus the diameter of the lower machine of the roll before grinding, and the result obtained is the wear amount of the midpoint diameter of the roll in the rolling mill. The grinding machine measurement system adopts external card type grating ruler to measure the diameter data, and the measurement accuracy is +-0.002mm. The calibration of the measurement system is performed using the reference diameter disk that comes with the grinding machine, and the calibration of the measurement system is performed once a day.
[0027] For example, the actual wear of each fr...
experiment example 1
[0053] Experimental Example 1: Roll Wear Accuracy Calibration
[0054] In the first half of 2013, combined with the actual situation of a certain factory, after counting the four planned orders, the actual wear amount of the F1, F2, F3 and F4 frames was obtained through the roll grinder, and then calculated by the second-level shape calculation method to obtain the theoretical Wear amount, compare, and adjust the wear coefficient of the frame, see Table 4, Table 5 and Table 6 for details:
[0055] Table 4: Wear coefficient adjustment table for F1 frames
[0061] In addition, for some high-grade non-oriented silicon steel such as S18 and S12 with a silicon content above 2.5, etc. (1.55mm*1175mm specification), it is easy to have the problem of intermediate waves on the F4 frame and the F6 frame, but through the above verific...
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Abstract
The invention discloses a method for controlling middle waves in the strip penetrating process of finishing mill frames, and belongs to the technical field of steel rolling. The method for controlling middle waves in the strip penetrating process of the finishing mill frames comprises the steps that the actual roll abrasion loss of the machine frames from F1 to F7 is respectively measured through a roll grinder, and the actual abrasion loss of any machine frame in the machine frames from F1 to F7 is obtained; according to the roll abrasion rate, the rolling force in unit width, the number of revolution times of a roll, the surface hardness factor of the roll and the actual abrasion loss, the theoretical abrasion loss of any machine frame in the machine frames from F1 to F7 is respectively obtained through a secondary flatness calculation method; when the theoretical abrasion loss of any machine frame in the machine frames from F1 to F7 is larger than the actual abrasion loss, the abrasion coefficient of the corresponding machine frame is adjusted. The method for controlling middle waves in the strip penetrating process of the finishing mill frames relieves the phenomenon that middle waves are generated when thin strip steel penetrates through the finishing mill frames, improves the strip penetrating stability of products, and finally achieves the purposes of improving productivity and yield, lowering production cost and increasing returns.
Description
technical field [0001] The invention belongs to the technical field of steel rolling, and in particular relates to a method for controlling the middle waves of the strip threading of the finish rolling stand. Background technique [0002] The 1580mm rolling line of Qianyang Iron and Steel Co., Ltd. mainly produces thin-gauge strip steel and silicon steel. However, in the calculation of the above-mentioned products, the general general model always has problems caused by the mismatch of the proportional convexity of each stand. The problem of the middle wave when the belt is threaded between the racks, the second-level model of Qiangang also has a similar problem. The middle wave is a problem that is absolutely forbidden for thin-gauge products, otherwise, the strip steel will easily appear in an unstable swimming state due to the middle wave, and then scratch the side guide plate, fold the strip steel, and scrap steel in the middle of the strip steel, etc. , and even if the...
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