JPS62142024A - Correcting apparatus for rolling reduction of band plate leveler - Google Patents

Abstract

PURPOSE:To improve accuracy of rolling reduction by providing a detector for the extend of movement to detect a relief value of leveling rolls, calculating a correcting value for a set value of rolling reduction, then controlling the rolling reduction based on this correcting value. CONSTITUTION:On the band plate leveler provided with the upper roll 4 and the lower roll 3, a plate thickness detector 6 is set on the inlet side, and an inductosyn 7 for detecting the displacement to detect the relief value of the upper rolls 4 is arranged. When the rolling material 1 is reached just before a prepositioned leveler, the late thickness is detected by the plate thickness detector 6, then the plate thickness value is fed to a control device 9 and the rolling reduction value is set by a driving apparatus 8 for the rolling reduction. Next, the relief value of upper leveler rolls 4 are detected by the inductosyn, the compensating value of rolling reduction is calculated by the control device 9 to perform the correction of rolling material 1 through a cylinder 5 of the rolling reduction. In this way, the accuracy of rolling reduction is improved through the increased re-correcting rate.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is a strip leveler that corrects the shape of a strip by removing residual distortion, etc., and is capable of controlling a preset rolling amount of a leveling roll with high precision. The present invention relates to a reduction amount correction device for compensation.

<Prior art> A strip repeller is a device that repeatedly bends a rolled strip using a plurality of leveling rolls to remove residual distortion in the strip and correct curls. The reduction amount of plate levelers is set based on the thickness of the plate exiting from the borate mill. The leveler is a combination structure of a main leveler made up of large rolls and a front leveler made up of small diameter rolls arranged in a small pinch.It has a mechanism that can straighten a wide range of materials from thick to thin. Level while reversing.

<Problems to be solved by the invention> The conventional strip leveler + sets the reduction amount based on the thickness value of the strip at the exit side of the T-plate mill, but in reality, the strip thickness value is read. Since the amount of rolling down of the leveling rolls is then controlled in the driver's cab, the rolling down accuracy is poor. Further, when the leveling roll is rolled down, the leveling roll escapes due to elastic deformation, etc., and a number of passes are required until the leveling roll is corrected to the appropriate rolling amount.

SUMMARY OF THE INVENTION In view of the above-mentioned problems with conventional strip levelers, it is an object of the present invention to provide a reduction amount correction device for a strip leveler that can compensate for run-off of the leveling rolls and achieve highly accurate reduction. shall be.

<Means for Solving the Problems> The reduction amount correction device for a strip leveler of the present invention comprises a plurality of leveling rolls that face each other with a strip sandwiched therebetween and straighten the strip, and these leveling rolls for the strip. In the strip leveler, the strip leveler is equipped with a leveler reduction drive device that adjusts the amount of straightening of the strip by setting a reduction amount of A movement amount detector to detect, and control to calculate a correction amount for the set reduction amount of the leveling roll based on the detected value by the movement amount detector, and to operate the leveler reduction fixing device in accordance with this correction amount. It is equipped with a device.

Action> The leveling roll drive device operates according to the thickness of the strip, and the amount of reduction of the leveling roll is set. Then, the strip is straightened by pushing the strip against the leveling roll. At this time, when the leveling roll escapes, the movement amount detector detects the amount of escape of the leveling roll, and the control device responds to this amount of escape. The corrected amount is calculated and output to the leveler lowering drive device.

As a result, the leveler reduction drive device further reduces the leveling roll to correct the desired amount of reduction, thereby applying the desired correction to the strip.

<Embodiment> As shown in FIG. 1, which shows the concept of an embodiment of the rolling reduction amount correction device for a strip leveler according to the present invention, a rolled material 1 is fed between the roller 2 and the upstream leveler upper roll 4. This is corrected by the operation of the lowering sill 5 of the front leveler lowering drive device 8. That is, in straightening, first, when the rolled material 1 reaches just before the front leveler, its thickness is detected by the plate thickness detector 6, the plate thickness value is sent to the control device 9, and the plate thickness value is sent to the front leveler reduction drive device 8.
The reduction amount is set with . Next, the rolled material 1 enters the front leveler whose rolling reduction amount is set, and is corrected in a predetermined manner. 7, this detected value is sent to the control device, and the control device 9 calculates the reduction compensation for the escape amount of the front leveler upper roll 4, and feeds the signal back to the leveler reduction drive device 8 to drive the reduction cylinder ' 5, the rolled material 1 is straightened after being further reduced by a certain amount.

<Effects of the Invention> According to the device of the present invention, in contrast to a strip leveler that detects the plate thickness on the entry side of the leveler and sets the roll gap of the leveler to a value corresponding to the plate thickness, the roll escape when inserting the strip By feeding back the amount and performing reduction compensation, the re-straightening rate is improved, the reduction degree is improved, and the number of passes of the straightening operation can be reduced, resulting in energy savings.

[Brief explanation of drawings]

FIG. 1 is a conceptual diagram showing an embodiment of the strip leveler rolling reduction i correction device according to the present invention.
4 is a lower roll, 4 is an upper roll, 6 is a plate thickness detector, 7 is an inductor sink, 8 is a leveler lowering drive device, and 9 is a control device.

Claims (1)

[Claims] A plurality of leveling rolls that face each other to sandwich a strip and straighten the strip, and a leveler reduction drive device that sets the amount of reduction of these leveling rolls with respect to the strip and adjusts the amount of correction of the strip. The leveler includes a movement amount detector that detects the escape amount of the leveling roll with respect to a set reduction amount of the leveling roll by the leveler reduction drive device, and a movement amount detector that detects the escape amount of the leveling roll with respect to the set reduction amount of the leveling roll by the leveler reduction drive device; A reduction amount correction device for a strip leveler, comprising a control device that calculates a correction amount for a set reduction amount and operates the leveler reduction drive device in accordance with the correction amount.