A method for improving the coil quality of hot-rolled strip steel
A hot-rolled strip and coil shape technology, which is applied in the direction of metal rolling, metal rolling, rolling mill control devices, etc., can solve the problems of increasing the secondary expansion stroke, equipment structure restrictions, etc., to improve coil shape and increase production Efficiency and the effect of reducing accident time
Active Publication Date: 2021-04-02
ANGANG STEEL CO LTD
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Problems solved by technology
In order to ensure that the reel is tight enough when coiling steel, it is necessary that the secondary expansion position of the reel with load is obviously smaller than the position without load, but due to the limitation of the equipment structure, it is impossible to increase the secondary expansion stroke directly. accomplish
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[0032] The present invention will be described in detail below, but it should be noted that the implementation of the present invention is not limited to the following embodiments.
[0033] A method for improving the shape quality of hot-rolled steel strip, comprising:
[0034] 1) Calculation of the tail point position calculation of the parking position at the tail of the strip
[0035] After the head of the coiler bites the steel, delay 21-36 seconds to start setting the tail stop state. After the tail throws steel, when it is detected that the tail of the strip leaves the pinch roller, the tail automatic stop control starts, and the reel stops according to the deceleration curve. ;
[0036] a) After the pinch roller of 1# coiler bites the steel, it delays 21-36 seconds to start calculating the position of the tail point. The calculation is completed after the steel is thrown from the F7 frame. After the coil stays in the coiler for 26-53 seconds, start the rotation contro...
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The invention relates to a method for improving the coil shape quality of hot rolled strip steel. The method comprises the steps of after the head part of a coiling machine bites steel, delaying 21-36seconds, and starting to set a stopped state of the tail part; after the tail part throws steel, when the tail part of the strip steel leaving a pinch roll is detected, enabling the tail part to automatically stop and start to control, and enabling a coiling block to stop according to a retardation curve; when the tail part of the strip steel enters a definite range from a starting stop position,determining a tail part stop position according to a pair tail conversion timing sequence; and after normal coiling is completed, adopting the appropriate uncoiling delaying time in the coiling machine. The method has the advantages that after the coiling machine bites steel at the heat part of the strip steel, the pair tail position pre-judgment of the tail part and the calculation and judgmentof automatic rotation angle after aligning delaying are introduced, the final uncoiling position can be selectively determined according to operational requirements, and therefore the coil shape quality of the hot rolled strip steel is improved, and the chance of flat coiling due to wear of the coiling block, insufficient tension, insufficient cooling water capacity and large roll-gap deviation ofa wrapper roll is reduced.
Description
technical field [0001] The invention relates to a method for improving the coil shape quality of hot-rolled strip steel. Background technique [0002] Advanced high-strength steel plates produced by hot rolling, as well as hot-rolled steel plates for special purposes, require high impact performance, crush strength, fatigue performance, cold bending performance, etc.; in addition to the above-mentioned good mechanical properties and formability, It should also have good welding performance, spot weldability, corrosion resistance, aging resistance stability, performance uniformity and stability, and good damping performance. However, there is a common problem in the production process of these steels: flat coils. Typical varieties include: automotive steel, weathering steel, military steel, knife steel, and dual-phase steel. In the production process, due to the unloading procedure of the coiler, the steel plate reel with a thickness of less than 6 mm has a reverse function ...
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IPC IPC(8): B21B37/00B21B15/00B21C47/02
CPCB21B15/00B21B37/00B21B2015/0057B21B2201/06B21C47/02
Inventor曲晓东张华郭宝安王洪海史乃安范垂林崔丕林孟凡志李向科王鑫
OwnerANGANG STEEL CO LTD