Eleven-roller straightener roller system zero calibration method

Abstract

The invention discloses an eleven-roller straightener roller system zero calibration method. The eleven-roller straightener roller system zero calibration method comprises the steps that (1) after an upper roller system and a lower roller system are opened by screw-down motors, worn old rollers in the upper roller system and the lower roller system are pulled out and replaced with new rollers; (2) at least one horizontal pressing block is placed at each of the two ends of the roller face in the axial direction of rollers of the lower roller system; (3) the upper roller system is opened to be 3-5 m above the horizontal pressing block through the screw-down motors; (4) a main balance system is subjected to decompression independently, and after a hydraulic cushion is kept in a pressurizing state, four couplings are disengaged; (5) four screw-down screw rods are subjected to manual turning separately until manual turning conducted on the four screw-down screw rods cannot be continued, at the moment, the thickness value of the horizontal pressing block is the height value to which the roller gap between the upper roller system and the lower roller system needs to be adjusted; (6) manual turning conducted on the four screw-down screw rods is stopped, and after the main balance system is pressurized, the four couplings are connected; and (7) the horizontal pressing block is taken away, and the whole zero calibration work is finished. According to the eleven-roller straightener roller system zero calibration method, zero calibration can be conducted on the roller gap of a straightener fast and accurately.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to a zero-calibration method for a roll system of an eleven-roll leveler. Background technique [0002] During the rolling and cooling process of steel, due to the influence of various factors, shape defects often occur. In order to eliminate these defects, the steel needs to be straightened on a straightening machine. Straightening is to make the curved part of the steel withstand considerable reverse bending or stretching, so that the part produces a certain elastic-plastic deformation. When the external force is removed, the steel undergoes elastic-plastic recovery and then reaches straightness. Therefore, the role of the straightening machine is to correct the steel that is bent or twisted due to external force and temperature changes during the rolling and cooling process. [0003] According to the straightening method and structural characteristics, the straig...

AI Technical Summary

Problems solved by technology

However, this zero-calibration process requires multiple times of pressing and taking lead blocks, which will inevitably result in repeated operations and multiple calculations, which not only results in the measurement cost of replacing new lead blocks with multiple uses, but also due to manual measurement and reading of lead block indentations. Data, there is a large human error, which will eventually affect the inaccurate calibration

[0008] Due to the fast production pace of the plate factory, the above two zero-calibration processes make the zero-calibration time of the entire roll system of the straightener 90-140 minutes (greater than 60 minutes for daily repairs), and there is a disadvantage of poor zero-calibration accuracy, so it cannot Meet production requirements

In addition, in the above two zero-calibration processes, the reason why the zero-calibration time of the roller system of the straightener is too long is that the main balance system of the balance cylinder and the hydraulic cushion system for pressing down the screw rod are a common set of hydraulic systems. , When the roller system is zero-calibrated, the pressure of the main balance system of the balance cylinder is relieved, and the hydraulic cushion system that presses down the screw rod is also relieved at the same time, but the hydraulic cushion system that presses down the screw rod when the roller system is zero-calibrated must be in a pressurized state. That is, if the hydraulic cushion system that presses down the screw rod is depressurized and then cranked, the zero position will be inaccurate after the roller system is charged.

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