Roll Gap Calibration Device and Method for Billet Tension Leveler

Abstract

The invention discloses a roll gap calibration device and method for square billet tension levelers. The calibration device comprises at least one calibration chain with two or more unequal standard thicknesses, and the calibration chains are connected in a hinged mode end to end. The calibration method comprises the following steps that an upper roller and a lower roller of each tension leveler are pressed on the position that the standard thickness of the calibration chain is Hi; the reading on each displacement sensor is back to zero; the upper roller and the lower roller of each tension leveler are pressed on the position that the standard thickness of the calibration chain is Hk; the reading of each displacement sensor at the moment is judged whether is within the range of (Hk-Hi) + / - 0.1 mm or not; if the reading is in the range, the zero point calibration of each displacement sensor is accurate; if not, the reading of each displacement sensor is back to zero, the zero point is proofread by using standard thickness, calibration and proofreading are performed repeatedly, and the accurate zero point of each displacement sensor is determined; the roll gap of each tension leveler is adjusted to be at a standard roll gap value; the reading of each displacement sensor is back to zero. According to the calibration method, a calibration device can be used to complete the calibration and proofreading of the tension levelers, and the calibration device is not prone to deforming and can be machined easily.

Description

technical field [0001] The invention relates to the field of continuous casting, and more specifically, to a roll gap calibration device and method for a billet drawing and straightening machine. Background technique [0002] In the field of continuous casting, the commonly used calibration method is the roll gap calibration method of the light-pressure pull-down leveler using the dummy bar, such as figure 1 As shown, the continuous casting machine 100 is provided with several tension leveling machines 200, each tension leveling machine 200 mainly includes a pair of tension leveling rolls 210 and a hydraulic cylinder 220, the lower roll 211 of the tension leveling rolls 210 is a fixed support roll, The rotation of the upper roller 212 of the pulling and straightening roller 210 is driven by a motor, and the lifting is controlled by a hydraulic cylinder 220 fixedly connected thereto. A displacement sensor 230 is installed on the hydraulic cylinder 220 to detect the displacem...

AI Technical Summary

Problems solved by technology

However, when calibrating the tension leveling machine, since the rigid dummy bar has no hinge, deformation is not allowed and there is a deviation from the arc of the continuous casting machine. When the tension leveler oil cylinder controls the upper roller to move downward toward the dummy bar, if the hydraulic pressure is low , the dummy rod cannot be in contact with the lower roller of the tension leveler, and the calibration of the tension leveler is not accurate. If the hydraulic pressure is too high, the calibration of the tension leveler is accurate, but the dummy rod undergoes permanent plastic deformation, and the head of the dummy rod cannot be accurate. into the crystallizer

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