Control method for loop height

Abstract

The invention discloses a control method for the loop height. Before a rolled piece enters a rolling mill N-1 and the front end of the rolled piece enters a rolling mill N, the speed of the rolling mill N is decreased to a set linear speed VN. After the rolled piece is bitten into the rolling mill N, a loop rising roll is lifted, a loop is formed by the rolled piece between the rolling mill N and the rolling mill N-1. A parameter RN is obtained by a control system through the rolled piece sectional area FN of the rolling mill N and the rolled piece sectional area FN-1 of the rolling mill N-1. The control system regulates the linear speed VN-1 of the rolling mill N-1 through the RN and the set linear speed VN of the rolling mill N. The control method for the loop height has the beneficial effects of being high in percent of pass and easy to control.

Description

technical field [0001] The invention relates to the field of steel rolling, in particular to a method for controlling the height of a looper. Background technique [0002] With the high-speed development of steel rolling technology, looper control has been widely used in the automatic control of continuous rolling, and has become a mature means of automatic speed control of continuous rolling mills. [0003] The automatic looper automatically adjusts the motor speed of the upstream frame according to the measurement of excess material formed between two adjacent frames, and the excess material of the two adjacent frames is led to the looper to form a looper. On this looper, the current looper height is measured by the corresponding digital looper scanner, and during the rolling process, the measured value is always consistent with the set value through the intelligent control of Siemens S7-400PLC , so as to achieve the purpose of micro-tension rolling between two adjacent s...

AI Technical Summary

Problems solved by technology

On this looper, the current looper height is measured by the corresponding digital looper scanner, and during the rolling process, the measured value is always consistent with the set value through the intelligent control of Siemens S7-400PLC , so as to achieve the purpose of micro-tension rolling between two adjacent stands. In the actual use process, incorrect setting and adjustment of the looper height will cause fluctuations in the size of the rolled piece and excessive length of the head and tail ears, reducing the rolling loss. Pass rate

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