A control system and control method for a double-high line single-double line rolling tension adjustment system

Abstract

The invention provides a control system and control method for a double-high line single-double line rolling tension adjustment system. The control system includes a tension detector and an intermediate rolling control adjustment platform connected with the tension detector. The control method is to collect real-time Comparing the tension data of crossing the steel when the single and double lines of the high line switch to each other and the tension data of the normal rhythm of the double high line and the double line passing the steel, calculate the difference between the tension data of the two, and adjust the adjacent two of the double high line according to the difference. Tension between rolling mills; this method can quickly, accurately, real-time and simply control the production bottleneck problem caused by the instability and abnormal conditions of the double-high line single-double line rolling tension adjustment system, and prevent two production bottleneck problems. 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.

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-double line rolling tension adjustment system. Background technique [0002] In the normal and inevitable single and double-strand rolling process of the double-high line of the rolling mill, the following conclusions can be drawn from the huge difference in the waveforms of the finishing mills of the I-line and II-line and the 1# looper under the same rolling conditions: Assuming that the roll gap of the 13th rolling mill is set to a tension data of 4.2, then during the rolling process of a steel, the tension data of line I is always 4.2, and the tension data of line II changes from 4.1 to 4.0 and then to 4.3. The shape of the material coming out of the 13th rolling mill of the I line is almost stable during the rolling process of a steel, and it is extremely stable. Even when the steel is ...

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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