Accurate calibration method for roll gap of mechanical pressing-down straightener

Abstract

The invention relates to an accurate calibration method for a roll gap of a mechanical pressing-down straightener. The method comprises the following steps of placing two calibration blocks between an upper straightening roll and a lower straightening roll, then carrying out oil drainage and oil filling on hydraulic cushions and pressure sensors once, recording numerical values F0 on the pressure sensors of the respective hydraulic cushions, and simultaneously, turning transmission shafts on two sides of a pressing-down clutch, so that a pressing-down screw rod drives an upper rack, an upper roller box and the upper straightening roll to move downwards, when the upper straightening roll makes contact with the calibration blocks, increasing the pressure value F of the hydraulic cushions, when the increment between F and F0 reaches 0.5 MPa, stopping pressing down of a hand disc, and at the moment, enabling the values of the calibration blocks to be roller gap calibration values; recording the thickness of the calibration blocks as a roll gap value, namely a roll gap calibration value; and closing the clutch, starting a pressing motor to drive an upper straightening roll system to move upwards, withdrawing the calibration blocks, and finishing the calibration process. The method has the advantages that the calibration accuracy of the straightening roll gap is improved, and the straightness of a steel plate during straightening is guaranteed.

Description

technical field [0001] The invention relates to the technical field of leveler roll gap calibration, in particular to an accurate calibration method for mechanically pressing the leveler roll gap. Background technique [0002] Straightening machine is one of the important equipment on the plate production line, mainly to level the steel plate. There are mainly two modes of pressing down for the straightening machine: mechanical pressing and hydraulic pressing. The hydraulic pressing has a high degree of automation, and the roll gap calibration is simple and accurate; the mechanical pressing structure is complex and has many influencing factors, and it is difficult to accurately calibrate the roll gap. [0003] The roll gap value between the upper and lower straightening rollers is called the roll gap, and the roll gap value is displayed by a displacement sensor installed on the screw rod. Replacement of straightening rollers or re-measurement and correction of the upper an...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the problem of low measurement accuracy of the roll gap of the existing leveler, provide an accurate calibration method for the roll gap of the mechanically pressed leveler, improve the calibration accuracy of the straightening roll gap, and ensure that the steel plate is straightened straightness

Images