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Method of controlling temper mill and electro-hydraulic servo system for controlling temper mill

An electro-hydraulic servo system and levelling machine technology, applied in the field of electro-hydraulic servo system, can solve problems such as damage to the surface of work rolls, and achieve the effects of avoiding damage to the surface of the roll, improving surface quality, and ensuring production rhythm

Active Publication Date: 2019-07-23
SHOUGANG JINGTANG IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The present invention provides a method for controlling a temper machine and an electro-hydraulic servo system for controlling the temper machine, so as to solve or partially solve the problem of damage to the work roll surface of the temper machine in the process of closing the frame in the prior art problem technical problem

Method used

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  • Method of controlling temper mill and electro-hydraulic servo system for controlling temper mill
  • Method of controlling temper mill and electro-hydraulic servo system for controlling temper mill
  • Method of controlling temper mill and electro-hydraulic servo system for controlling temper mill

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Embodiment 1

[0029] In the embodiment of the present invention, the leveling machine is first introduced. Specifically, the leveling machine includes a frame composed of an upper roller system and a lower roller system, and an electro-hydraulic servo system that controls the opening and closing of the frame; The hydraulic servo system includes a proportional-integral-derivative PID controller that adjusts the opening of the servo threshold of the electro-hydraulic servo system.

[0030] The continuous flattening machine of this embodiment is a single stand six-high rolling mill structure, and the stand structure is as figure 1 As shown, where:

[0031] Upper roller system: 1. Upper support roller, 2. Upper middle roller, 3. Upper working roller;

[0032] Lower roller system: 5. Lower work roller, 6. Lower middle roller, 7. Lower support roller;

[0033] Middle part: 4. Strip steel.

[0034] The leveling machine adopts the single-rotation transmission of the lower supporting roller and the hydraulic...

Embodiment 2

[0064] Based on the same inventive concept, this embodiment provides an electro-hydraulic servo system for controlling the leveling machine. First of all, for the leveling machine, the leveling machine includes a frame composed of an upper roller system and a lower roller system; the electro-hydraulic servo system is used to control the opening and closing of the frame. For the specific working principle, please refer to the description in the foregoing embodiment, which will not be repeated in this embodiment.

[0065] image 3 It is a schematic diagram of the electro-hydraulic servo system that controls the leveling machine. The electro-hydraulic servo system includes a PID controller that adjusts the opening of the servo threshold of the electro-hydraulic servo system, and the PID controller includes: an output limiting control module 301. Used to adjust the output limiting value coefficient Umax in the rolling force control stage in the process of the electro-hydraulic servo ...

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Abstract

In order to solve the technical problem that after a working roller of a temper mill is replaced, the roller surface of the working roller is damaged in the machine frame closing process, the invention provides a method of controlling the temper mill. The temper mill comprises a machine frame and an electro-hydraulic servo system. The machine frame comprises an upper roller system and a lower roller system, and the electro-hydraulic servo system controls the machine frame to be opened and closed. The electro-hydraulic servo system comprises a PID controller which adjusts the servo threshold opening degree of the electro-hydraulic servo system. In the rolling force control stage of the process that the electro-hydraulic servo system controls the lower roller system to upwards move to closethe machine frame, the PID controller adjusts the output amplitude limiting value coefficient Umax, the amplitude limiting is conducted on the servo threshold opening degree, the inertia impact forcewhich is generated when rollers make contact with strip steel in the closing process of the temper mill is reduced, the phenomenon that the damage to the roller surface of the new working roller exists in the closing process is avoided, and therefore the defect of transverse roller marks which appear on the surface of the strip steel in the vehicle starting production process is overcome, and thesurface quality of the strip steel is improved.

Description

Technical field [0001] This application relates to the field of iron and steel metallurgy technology, in particular to a method for controlling a leveler and an electro-hydraulic servo system for controlling the leveler. Background technique [0002] A 2230 continuous return production line uses a six-roller CVC leveler. It is necessary to replace the work rolls when producing wide strips of more than 1800mm or high surface grade products, or replace the work rolls during daily maintenance, and close the frame after the replacement. However, the roll surface damage of the new work roll occurred after the machine frame was closed, which resulted in "transverse roll mark" defects on the surface of the strip steel during the start of production, which seriously affected the surface quality of the strip steel. A large amount of transition material was needed to eliminate it. Affected the production line scheduling and production rhythm. Therefore, how to avoid the roll surface damag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B37/62
CPCB21B37/62
Inventor 张益滔常生财李文波王艳强刘永超张进王晨刚李国辉王硕王立朋
Owner SHOUGANG JINGTANG IRON & STEEL CO LTD
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