Soft measurement method for tension between cold continuous rolling racks based on online monitoring

Abstract

The invention provides a soft measurement method for tension between cold continuous rolling racks based on online monitoring, and belongs to the technical field of steel rolling. The method comprises the following steps: firstly, calculating rolling torque based on a mathematical model according to parameters such as actually-measured motor torque and actually-measured rolling force; then calculating a loss moment; calculating the tension moment according to the rolling moment and the loss moment; further calculating tension according to the tension moment; sending the calculated value to the PLC for online monitoring; and finally carrying out model self-learning to ensure the calculation precision of the model. The tension between the cold continuous rolling racks is calculated through a soft measurement method, the tensiometer is monitored in real time, when the deviation between the tensiometer and a calculated value is increased, a fault alarm is given out, and when the tensiometer is damaged, the function of the tensiometer can be achieved by replacing the tensiometer. Through the method, the problem that normal production cannot be carried out when one or more tensiometers in front of and behind the rack break down or are damaged can be solved.

Description

technical field [0001] The invention relates to the technical field of steel rolling, in particular to an on-line monitoring-based soft measurement method for inter-stand tension of cold continuous rolling mills. Background technique [0002] With the continuous advancement of intelligent manufacturing, with the help of the big data collection platform in steel production, it has become the most urgent task to fully tap the internal relationship of data and assist the production line to solve some practical problems. A large number of instruments are used in steel production to act as the "eyes" of the production line. Once some key instruments fail or are damaged, it will inevitably affect product quality and even cause production accidents. In order to solve this problem, the best way is to use soft-sensing technology. Soft-sensing technology is to use the measurable information composed of auxiliary variables to realize the measurement of the leading variable through soft...

AI Technical Summary

Problems solved by technology

Once the tensiometer fails or is damaged, it is impossible to ensure that the strip steel can be controlled according to the set tension, resulting in the failure of normal production. Therefore, a soft measurement technology is needed to monitor the tension online. Soft measurement research” puts forward the method of soft measurement of coiler tension. Document 2 “Study on soft measurement of cold-rolled strip uncoiling tension” proposes a method of soft measurement of coiler tension. There are no related patents and literature descriptions for the soft measurement method of tension between rolling stands

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