Method for calibrating openness of vertical roll of rolling mill

Abstract

The invention provides a method for calibrating the openness of a vertical roll of a rolling mill. The method comprises the following steps of: winding two vertical roll flat head sleeve rings by a thin line to measure the length L1 of the thin line; then winding a single vertical roll flat head sleeve ring by the thin line to measure the length L2 of the thin line; respectively measuring the distances L3 and L4 from a rolling central line to the edges of bearing boxes of the vertical rolls at both sides so as to respectively obtain the total openness and the openness of the left vertical roll and the openness of the right vertical roll according to formulas of (L1-L2) / 2, (L1-L2+2*L3-2*L4) / 4 and (L1-L2-2*L3+2*L4) / 4. With the adoption of the method, the openness of each vertical roll can be conveniently, fast and accurately calibrated so as to provide accurate basic conditions for controlling the width of a steel plate and centering a strip plate, the measuring and repairing time can be saved, and the work efficiency and the precision of a rolled steel plate can be improved. Meanwhile, potential safety hazards can be eliminated, and personal injury accidents can be avoided.

Description

technical field [0001] The invention belongs to the technical field of equipment calibration, and in particular relates to a calibration method for vertical roll opening degree of a hot-rolled strip mill. Background technique [0002] The vertical roll is the main mechanical equipment for the side rolling of the hot-rolled strip mill, and plays a very important role in width control and strip centering. Therefore, after each overhaul or when the vertical roller fails, it is necessary to re-calibrate the opening of the vertical roller (ie, the roll gap). [0003] At present, the general method adopted to measure the opening value of the vertical roll is: [0004] 1. After the stop of rolling, the surveyor stands on the transition guard plate of the vertical roll, and measures the distance L between the center line of the vertical roll and the vertical roll surface of the working side WS , Distance L from the roller surface of the vertical roller on the transmission side DS...

AI Technical Summary

Problems solved by technology

Since the vertical roll is arranged between the descaling box and the rolling mill, the working space is narrow and there is no safety fence. The measuring personnel can only enter the vertical roll sideways, and they can barely stand with the support of their legs. The measurement is very inconvenient

Second, the measurement efficiency is low and the measurement time is long

Third, during the normal rolling process of the rolling mill, when the vertical roll fails and needs to be calibrated, the temperature in the vertical roll area is very high, and the measuring personnel cannot enter the vertical roll for measurement, resulting in inaccurate calibration of the vertical roll opening and affecting the control of the slab width. precision

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