Method for solving problem of loop charging and drifting of production line of pickling-rolling coupled machine

Abstract

The invention relates to a sector segment actuating mechanism taking pressure as a control target, belonging to the technical field of continuous casting equipment in a metallurgy industry. The sector segment actuating mechanism comprises a displacement sensor, a hydraulic cylinder, a pressure sensor, an electric control system, a hydraulic system and a sector segment, wherein the hydraulic cylinder of the sector segment is provided with the displacement sensor and the pressure sensor which are matched with the hydraulic cylinder; the signal output ends of the displacement sensor and the pressure sensor are connected with the electric control system; the output of the electric control system is connected with the hydraulic system; and the hydraulic system is connected with the hydraulic cylinder of the sector segment. The sector segment can reflect the stress of a casting blank in real time by taking the pressure as the control target, solve the problems of errors caused by sensor drifting and initial roll gap setting, prevent the casting blank from internally cracking and the sector segment from being damaged due to overload because of superabundant shrinkage mass and also ensure good casting blank quality through the force analysis of the casting blank. Besides, the method can also be used for judging the position of a liquid core of the casting blank and providing accurate feedback data for the application of a dynamic soft reduction technology.

Description

Technical Field: [0001] The invention relates to a method for solving the tail flick of a looper sleeve of a pickling-rolling online production line, and belongs to the technical field of metallurgical steel rolling production line control. Background technique: [0002] With the development of cold-rolled sheet technology, the continuous rolling production line of the pickling line and the continuous cold rolling line has become the most typical production line at present, referred to as the pickling line for short. In order to ensure that the tandem cold rolling mill is still running at high speed during welding, a large-capacity looper is arranged in the pickling section to ensure that sufficient strip steel enters the rolling mill. Production line loopers are mostly horizontal, usually [0003] Install two to three loopers, generally the looper filling volume is greater than 200 meters. Each looper control device is equipped with an absolute value encoder, which is used to de...

AI Technical Summary

Problems solved by technology

Under the control of the existing control program, the above-mentioned control process can run normally during most of the production line operation; however, sometimes the tail of the steel strip will leave the uncoiler at a very fast speed during the production process and rush into the inlet looper , causing damage to the equipment at the entrance and seriously affecting production

The root cause of this kind of problem is generally caused by the inaccurate start time of entering the fifth step of the tail drift stage

In order to solve this problem, the method adopted by people is: when there are special circumstances such as the second start-up and the sudden speed increase of the pickling section in the production, the entrance speed is limited to protect it. Although this method can eliminate the tail of the steel strip during the production process It will leave the uncoiler at a very fast speed and rush into the inlet looper, but it reduces the filling efficiency to a certain extent

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