Tracing correcting method of hot tandem rolling precision rolling second-level system

Abstract

The invention relates to hot-rolled strip steel rolling technology, in particular to the tracking technology of the secondary system of hot continuous rolling and finishing rolling. The invention discloses a method for tracking and correcting the secondary system of hot continuous rolling and finishing rolling. The technical solution of the present invention is: add a tracking correction triggering process lagging behind the triggering process in the tracking system, and the tracking correction triggering process collects L1 level signals and filters out flickering signals, and judges whether the rough rolling system sends the current steel coil to the finishing rolling system in time If not, search for the corresponding steel coil number; collect and calculate the corresponding intermediate billet data, and judge whether it is within the valid range, if so, track and correct the trigger process to record the calculation result and give the control right to the tracking system, sleep Wait for the next trigger time to be woken up; otherwise, directly sleep and wait for the next trigger time to be woken up. The invention has the beneficial effects of significantly reducing the steel rolling accidents and the quantity of steel scrap caused by the finishing rolling secondary tracking system, and improving the yield and pass rate of rolled products.

Description

technical field [0001] The invention relates to hot-rolled strip steel rolling technology, in particular to the tracking technology of the secondary system of hot continuous rolling and finishing rolling. Background technique [0002] The tracking of the hot continuous rolling and finishing rolling secondary system mainly combines micro tracking and macro tracking. The tracking system is driven by the filter signal of the L1 (equipment and basic automation) level sensor, the process electromechanical text and the remote control command of the database, and completes the strip position tracking. system description and triggering of different timings. Since the scope of tracking after entering the finishing rolling line is; from the entrance of rough rolling R2 (the second flat bar mill) to No. 2 coiler, the tracking principle is based on the detection and detection of sensors on the rolling line The shift of the steel coil number and the rough rolling process machine send th...

AI Technical Summary

Problems solved by technology

[0003] 1. Due to the most complicated rolling conditions in the finishing rolling area, affected by abnormal conditions such as the sensor signal of the rolling line, the speed of the roller table, and the rolling conditions, the tracking system of the finishing rolling secondary system tracks the rolled piece in the finishing rolling The non-displacement phenomenon often occurs in the area, causing the rolling piece to track and break the strip;

[0004] 2. Since the abnormal working conditions of the rolling line are not considered in the tracking program, the tracking system is prone to deadlock;

[0006] 4. Affected by the working environment in the rough rolling area, the working state stability of the sensors, pyrometers, speedometers and other rolling line instruments in the rough rolling area is not stable enough, which greatly affects the actual measurement data collection of the rolled piece in the rough rolling area ;

[0007] 5. The data collection of the rolled piece is sent to the rough rolling secondary system after the L1 level collection is completed. The rough rolling secondary system only filters and screens the collected data, which may easily cause the data collection of the rolled piece to be separated from the application system itself. When the message is sent to the finish rolling system, the time delay is caused by the problem of the processing of the rough rolling process machine itself

[0008] The above problems seriously affect the control of L2 (process control system) level control logic calculation and model accuracy

It often leads to misalignment between the finishing rolling tracking and the real object. There are often no tracking messages and tracking coil numbers, wrong numbers, same numbers, etc. in the finishing rolling tracking rolling line, and the finishing rolling secondary system model sets the most needed intermediate billet data (The temperature, thickness, width and rolling force of the intermediate billet) will also be unable to be sent to the finishing rolling system due to the collapse of the rough rolling communication system and the blockage of the database, resulting in errors in the entry tracking of the finishing rolling secondary system. Under the control of the secondary process of rolling, the logic system of finishing rolling will be confused and the model cannot be carried out

[0009] Normal setting, the operator has to frequently use zero-time setting rolling, and the downlinked procedure benchmark reduces the prediction accuracy of the model for rolling parameters, the self-learning result of the finishing rolling secondary model is wrong, and the rolled product Ultra-thick or ultra-thin, in severe cases, it will cause crushing, so that an accidental roll change will occur, which will have a great impact on the normal production process