Method for preventing pre-straightening steel plate from colliding with subsequent equipment and steel plate warping detection device

Abstract

The present invention discloses a method for preventing collision of a pre-straightening steel plate and subsequent equipment, and a steel plate head warping detection apparatus. The method comprises: detecting the head warping height of the steel plate when outputting a pre-straightening machine on the head portion of the steel plate, and if the head warping height is larger than the alarm threshold, starting the roller seam rapid-opening protection of the pre-straightening machine. According to the present invention, the method uses the multiple protection mechanisms to carry out abnormal protection on the pre-straightening process; and with the apparatus, the steel plate head warping condition output by the equipment and meeting the alarming condition can be alarmed, such that the collision of the pre-straightening steel plate and the subsequent equipment can be effectively prevented so as to ensure safe production.

Description

Technical field [0001] The invention designs the field of automatic control in the steel rolling process, and particularly relates to a method for preventing a pre-straightened steel plate from colliding with subsequent equipment and a steel plate tilt detection device. Background technique [0002] In the steel plate rolling process, in order to improve the cooling quality of the accelerated cooling (ACC) system and reduce the pressure of the subsequent straightening process, a pre-straightening machine is added before the ACC system equipment of the production line to pre-straighten the hot-rolled steel plate. To improve the safety and reliability of rapid cooling. [0003] In the existing technology, such as figure 1 As shown, the automatic control process of the pre-straightening machine is as follows: the pre-straightening machine receives the steel plate information and setting values ​​sent by the upper computer, and stores them in the data buffer of the pre-straightening ma...

AI Technical Summary

Problems solved by technology

[0005] Since the area for judging that the tracking position meets the conditions is relatively short, for example, the length of the range area [C+1m, C+3m] is only 2 meters, and the steel plate passes through this area quickly when the straightening speed is executed, that is, the tracking position is within this area The time is very short, and it is easy to miss the judgment. In addition, the detection signal reliability of the detection components at the outlet is poor. In actual use, it is often encountered that the tail output pre-leveler is not judged.

In this case, the pre-leveler will not trigger the clearing of data, resulting in mismatched steel plate information remaining in the data buffer when the next steel plate is to be pre-straightened

If the roll gap set according to the remaining steel plate information is smaller than the actual thickness of the steel plate, the light one will cause the main drive of the pre-leveling machine to take over the safety handle, and the severe one will cause the pre-leveled steel plate to be seriously warped and hit the follow-up equipment , resulting in major equipment failure

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