SU865451A1 - Device for controlling metal velocity at hot rolling in vertical and horizontal stands - Google Patents

Description

(54) DEVICE FOR REGULATING THE METAL SPEED UNDER HOT ROLLING IN VERTICAL AND HIGH EFFICIENCY OVERSAGES

one

The invention relates to metallurgy and is intended to control the speed of a metal with npiOKaTKe metal simultaneously in the vertical and horizontal cages of a hot rolling mill.

A device is known in which the synchronization of the spinning of the rollers of both stands is carried out by calculating the current value of the extruded billet ingot or the speed of the metal entering the stand, which is measured by contacting metal-connected followers P1

A disadvantage of this device is the use of contact rollers, which introduce a significant error in the process of controlling the speed of the metal.

Most closely related to the invention is a device containing pro-; vertical rolling motor

cage with a unit for automatic adjustment of its rotational speed 2

However, the device has a low quality of the rolled ingot, caused by errors in controlling the speed of the metal and the head of the metal during rolling.

The purpose of the invention is to improve the quality of the rolled material.

The goal is achieved by

10 that in a device for controlling the speed of a metal during hot rolling in vertical and horizontal cages, containing a rolling motor of a vertical cage with

15 with an automatic control unit of its rotational speed, equipped with a metal pressure sensor located on a vertical stand, with a rolling load static meter

Claims (2)

20 of the vertical stand motor, the comparator unit, the integrator, the outputs of the metal pressure sensor and the static pressure gauge meter are connected to the input of the comparator unit, the output of which is connected to the integrator input, and its output is connected to the rolling motor of the vertical stand. The drawing shows the functional scheme of the device. The device contains a punctured ingot 1, which is simultaneously located in a vertical 2 and horizontal 3, cages. The rolls of the vertical stand 2 are rotated from the electric motor 4 of the vertical stand 2, which is connected to the power source 5 of the electric motor 4. Automatic control of the speed of rotation of the electric motor of the vertical stand 2 is carried out from the rotary adjuster 6 Frequency of rotation of the electric motor 4, at the input of which is connected the setting device 7. The metal pressure sensor 8 in the vertical stand 2 and the static current meter 9 of the electric motor 4 are of the power parameters during the rolling process. In addition, the device has a multiplication unit 10, the input of which receives a signal 1 proportional to the flow of the electric motor 4, and the output is connected to the voltage comparison unit 12, to the input of which a signal 13 of the voltage comparison unit 12 is supplied, the contact 14 of the rolling direction and integrator 15. The device works as follows. In the process of rolling ingot 1 in horizontal 3 and vertical 2 cages of a hot rolling mill, the difference in block 12-comparison between the setpoint signal 13, the signal of the metal pressure sensor 8 on the rolls and the signal of the static load gauge 9 consisting of the static meter 9 is determined. motor current, signal 11, proportional to the motor flow and multiplication unit 10 and feed it through contact I4 of the direction of rolling to integrator 15. The signal from the output of the integrator 15 together with the signal of the setpoint 7 is fed to the regulator 6, kOto1 61Y controls, through the power source 5, the rotational speed of the rolling electric motor 4. 4 At different entry speeds of metal into horizontal and vertical alkyias, there is a tendency to suppress the metal and the load magnitude of the electric motor 4 associated with this at almost constant pressure on the rolls. As a result, a voltage difference arises in the comparison unit 12, which is fed to the automatic control unit through the corresponding locks, which results in either increasing or decreasing the rotational speed of the rolling electric motor 4. The invention makes it possible to more accurately adjust the speed of the metal during vertical rolling and horizontal cages, to eliminate the pod of the metal, and as a result - to increase the quality of the rolled material. Apparatus of the Invention A device for controlling the speed of a metal during hot rolling in vertical and horizontal cages, containing a rolling electric motor of a vertical cage with an automatic control unit for its rotational speed, distinguishes tat with the fact that, in order to monitor the quality of the rolled material, it is equipped with a sensor metal pressure located on the vertical stand, static load meter of the rolling motor of the vertical stand, comparison unit, integrator, sensor outputs metal pressure meter and under a static load keys to the input of comparator unit whose output is connected to an input of the integrator and its output connected to an input unit vrascheshm servo motor speed prokatnyugo vertical stand. Sources of information taken into account in the examination 1. The author's certificate of the USSR 232911, cl. B 21 B 37/00, 1968. 2. Authors certificate of the USSR 563203, cl. B 21 B 37/00, 1971 (prototype j.