Control system and control method for double-high-speed-wire single-double wire rolling tension adjusting system

Abstract

The invention provides a control system and a control method for a double-high-speed wire single-double wire rolling tension adjusting system. The control system comprises a tension detector and an intermediate rolling control adjusting platform connected with the tension detector. The control method comprises the steps that steel passing tension data collected in real time when a double-high-speed wire is switched between a single wire and a double wire are compared with double wire steel passing tension data of the double-high-speed wire in the normal rhythm, the difference value of the twotension data is calculated, and the tension between every two adjacent rolling mills in the double-high-speed wire is adjusted according to the difference value. According to the method, the production bottleneck problem caused by instability and abnormal conditions of the double-high-speed wire single-double wire rolling tension adjusting system can be rapidly, accurately and simply controlled inreal time, and the production bottleneck problems in two aspects is prevented; and the production bottleneck problems include that on one hand, steel stacking is caused due to the fact that a loop cannot be well adjusted, and on the other hand, in the high-frequency large-slope adjusting process of the loop, the speed of a finishing mill drastically fluctuates, spinning is disordered, and the quality of finished products and disc shapes is affected.

Description

Technical field[0001]The invention belongs to the technical field of steel preparation, and in particular relates to a control system and a control method for a double-high-line single- and double-line rolling tension adjustment system.Background technique[0002]In the normal and unavoidable single- and double-line rolling process of the double-high line in the rolling mill, the following conclusions can be drawn from the huge difference in the waveforms of the finishing mills and 1# loopers of line I and line II under the same rolling conditions: Assuming that the roll gap of the 13th stand is set to the tension data of 4.2, during the rolling process of one steel, the tension data of line I is always 4.2, and the tension data of line II is 4.1 changed to 4.0 and then changed to 4.3. The material type from the 13th mill of Line I is almost stable during the rolling process of a piece of steel, and it is exceptionally stable. Even when the 13th mill of Line II is throwing steel, it h...

AI Technical Summary

Problems solved by technology

The material type coming out of the 13th rolling mill of the II line has three particularly obvious characteristics: a. If the 13th rolling mill of the I line is passing steel, and at this time the 13th rolling mill of the II line is receiving steel, then the 13th rolling mill of the II line The material shape coming out is smaller than the set material shape. Using the data as an example, if the roll gap of the 13th rolling mill is set to a tension data of 4.2, it is possible that the material shape coming out at this time only has a tension data of 4.1, resulting in II Line 1# cannot be set up, and it takes a long time to reach the set height, which leads to the fact that the finishing mill of line II has been decelerating during this process, and the laying machine of line II follows the deceleration of the finishing mill; b. If II The 13th rolling mill of the line is passing steel, and at this time, the 13th rolling mill of the I line is receiving steel. At this time, the material shape coming out of the 13th rolling mill of the II line will immediately become larger than the set material shape. Use the data as an example. If the roll gap of the 13th rolling mill is set to the tension data of 4.2, the material type at this time may reach the tension data of 4.3, which will cause the 1# of the II line to be set too high, and it will take a long time to reduce to the set value. In this process, the finishing mill of line II has been increasing in speed, and the laying head of line II follows the speed of finishing mill; c. During the rolling process of a steel in line 2, when the 13th rolling mill When throwing steel, the pass that was originally supported by two steel columns became a single support, which in turn caused the steel at the 13# exit of Line II to be compressed. In a short period of time, the second flow from the 13# frame of the II line has decreased, but the second flow of the II line 14# frame has not changed, so it will digest some looper sets, that is to say, the height of the looper is reduced, To accommodate this, the finishing mill was slowed down, which is unchanged from before

During the normal and unavoidable single- and double-wire rolling process of the double-high line, the actual height of the double-line looper is abnormal, and the frequency and slope of the change are large, which leads to the looper correction amount reaching the maximum limit of 50 scales. On the one hand It will lead to stacking of steel because the looper cannot be adjusted. On the other hand, during the high-frequency and large-slope adjustment process of the looper, the speed of the finishing mill will fluctuate violently, resulting in disordered silk spinning, which will affect the quality of the finished product and the shape of the disc.

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