Calibration method for clearance between rolls of hot-rolling vertical rolls

Abstract

The invention relates to a precision calibration method for clearance between rolls of hot-rolling vertical rolls, which mainly solves the technical problem that strip steel is deficient in quality because verticality and alignment to calibration of vertical rolls are not considered in current methods. The technical scheme is that the calibration method for clearance between rolls of hot-rolling vertical rolls comprises the steps of: 1, finding a rolling center line and marking; 2, the distance from the marker line to the rolling center line = the distance from the rolling center line to the roller center line (as |ZB|) + the distance from the roller center line to the marker line; 3, hitting apertures on both sides of the vertical rolls to marked positions, wherein a roll block is inside a marking line and aligned with the marking line; 4, measuring the distance from the lower ends on both sides of the vertical rolls to the rolling center line, and marking the measuring point as a point A, the radius of the rolls as R / 2 and the distances from A to a vertical roll operating side and from A to a transmission side as |OA| and |DA|; 5, comparing the measured value |OA|+R / 2 on the operating side with |ZB|, wherein if the difference is in a precision range, the verticality is good, and if the difference is not in the precision range, the clearance between rolls on the operating side is adjusted so that the difference is in the precision control range; 6, adjusting the clearance between rolls on the transmission side by the adjusting method in the step 5; and 7, measuring the total aperture of the vertical rolls, inputting the measured values and calibrating the clearance between rolls of vertical rolls after adjusting the verticality and alignment.

Description

technical field [0001] The invention relates to a calibration method for roll gaps, in particular to an accurate calibration method for hot rolling vertical roll gaps. Background technique [0002] The width accuracy of hot-rolled strip has always been an important indicator of the quality of hot-rolled strip products. The gap accuracy of the vertical roll is the most important factor that directly affects the width accuracy of the hot-rolled finished strip. The accuracy of the vertical roll gap is mainly determined by the calibration method. However, the previous calibration method of the vertical roll cannot guarantee the high accuracy of the roll gap. The calibration method and steps are as follows: 1. 2. Measure the opening value of the lower end of the vertical roller; 3. Input the measured opening value on the screen, and the calibration is over. The gap precision of the vertical roll has long-term influence on the first pass rate and quality cost loss of the hot...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an accurate calibration method for hot-rolled vertical roll gaps, which mainly solves the technical problem that the existing calibration methods do not consider the influence of verticality and alignment on the calibration of vertical rolls, resulting in strip steel quality defects

Images