Optimizing method for preventing and controlling scrab in cold band-steel continuous milling machine

Abstract

The invention discloses an optimizing method of using nick prevention and control as target in cold steel strip continuous-rolling machine, collecting equipment, steel strip characteristics, rolling process and other parameters of a cold continuous-rolling machine, and giving set values of initial tension and reduction of each machine frame, then separately finding skid factor and nick integrated judgment index value of each machine frame, and finding target function set for rolling rule optimization; then judging whether the target function meets Bauer' conditions, and finding the optimum tension and reduction set values. And it intrudes nick judgment concept, considers all machine frames of the cold continuous-rolling machine as a whole, and uses nick prevention and control as target to make on-line optimization settings on rolling rules, and can largely increase rolling speed and improve steel strip surface quality, and largely reduce huge economic losses of enterprises on the premise of assuring quality of products.

Description

technical field [0001] The invention relates to forming processing of cold strip steel, in particular to an optimization method aiming at scratch prevention in a cold strip continuous rolling mill. Background technique [0002] Cold strip continuous rolling process such as figure 1 As shown, the strip 1 is uncoiled from the uncoiler 2 and sent to the stands 31-3i. After being rolled by multiple stands, the strip 1 reaches a specified thickness and is sent to the coiler for rewinding. The rolls of each stand include backup rolls 4 and work rolls 5, wherein the work rolls 5 are in direct contact with the strip surface. [0003] The rolling process generally includes the setting of parameters such as front and rear tension of each stand, pass deformation (characterized by pass reduction or reduction rate). Since these parameters are the key factors of quality control in the cold strip continuous rolling process, a lot of research work has been done in this area. For details o...

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Problems solved by technology

[0004] The optimization and setting of the rolling schedule involved in the above-mentioned public documents generally only consider factors such as the relative load uniformity of the motors of each stand, thickness control, and plate shape, and never consider the prevention and prevention of scratches. scratches on the surface of the strip and the surface of the roll during the manufacturing process, see figure 2 , in the figure, there are scratches 6 in the strip 1 and the work roll 5. The scratches not only affect the improvement of the rolling speed, limit the output of the rolling mill, but also affect the surface quality of the strip, resulting in product quality grades Decline or even abolished, causing huge economic losses to the enterprise

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