Method for calibrating center line of guide ruler

Abstract

The invention relates to the field of hot rolled strip guide ruler centering, in particular to a method for calibrating the center line of a guide ruler. The method is characterized in that after maintenance is finished every time or strip steel with the thickness of 18 mm is rolled every time, the deviation of a transmission side and an operation side of the guide ruler is corrected in time to ensure the centering of the guide ruler. The method comprises the following specific operation steps: (1) measuring the width L of an extension strip at the middle part of the guide ruler, the distance L2 between the edge of the transmission side to a guiding plate on the transmission side of the extension strip, the distance L1 between the edge of the transmission side of the extension strip and an archway on the transmission side, the distance L3 between the edge of the operation side of the extension strip and the guiding plate on the operation side, and the distance L4 between the edge of the operation side of the extension strip and the archway on the operation side; (2) determining the deviation of the center of the extension strip; and (3) calibrating the center of the guide rule. Compared with the prior art, the method has the benefits that through in time correction of the deviation of the transmission side and the operation side of the guide rule after maintenance is finished every time or strip steel with the thickness of 18 mm is rolled every time, the wear and wax hanging phenomena of one side of the guide ruler, which is resulted from deviation of the guide ruler, are avoided.

Description

technical field [0001] The invention relates to the field of centering a hot-rolled steel strip guide bar, in particular to a method for calibrating the center line of the guide bar. Background technique [0002] At present, when the hot-rolled strip steel production line rolls wide and thick plates, the head of the steel plate often bumps against the finishing guide bar, causing the center line of the guide bar to deviate to one side, resulting in serious wear on one side of the guide bar, and steel plates remaining on the liner of the guide bar Swarf, forming the phenomenon of "hanging wax". When rolling cold-rolled material with softer material, the edge of cold-rolled material will be scratched, which will affect product quality. After the guide ruler liner is waxed, it needs to be polished during the roll change, which often cannot be completed within 10 minutes of roll change, which affects the normal production progress. [0003] The existing guide ruler calibration ...

AI Technical Summary

Problems solved by technology

[0002] At present, when the hot-rolled strip steel production line rolls wide and thick plates, the head of the steel plate often bumps against the finishing guide bar, causing the center line of the guide bar to deviate to one side, resulting in serious wear on one side of the guide bar, and steel plates remaining on the liner of the guide bar When rolling the soft cold-rolled material, the edge of the cold-rolled material will be scratched, which will affect the product quality

After waxing the guide ruler liner, it needs to be polished during the roll change, which often cannot be completed within 10 minutes of roll change, which affects the normal production progress

[0003] The existing guide ruler calibration method is to open the guide ruler to a certain opening, then measure the distance between the liner on both sides of the guide ruler and the extension bar, and then input these two values ​​in the control system calibration screen for calibration. It can ensure that the opening of the guide ruler is accurate, but because of the wear of the extension bar width, it cannot guarantee that the center line of the guide ruler will not deviate, so a new calibration method is required

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