SU1444010A1 - Arrangement for braking rolled stock in cooling rack - Google Patents

Abstract

The invention relates to equipment. Wanig rolling mill in the steel industry. The purpose of the invention. is the simplification of design, reduction of ketal and energy intensity. The device contains lifting valves 1, located between the rollers 2 of the roller table of the refrigerator. Stationary straightening troughs 4 are installed parallel to the valves. Brake electromagnets are built in under the first stream of flattening gutters. The straightening troughs at the bottom of the first stream have a longitudinal slot dividing it into two elements a and 5, and the brake electromagnets with opposite poles are rigidly connected with these elements. 2 Il. c (o

Description

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The invention relates to equipment for ferrous metal rolling mills — Lurp — w and can be most effectively used on uninterrupted small-section mills with single valve dumpers specialized in the production of thermally hardened (ferromagnetic) steel.

The aim of the invention is to simplify the design, reduce metal and energy consumption.

Fig. 1 shows a device for braking a rolled stock, a general view; FIG. 2 is a section L-A in FIG.

The device for braking, rolling contains lifting valves 1 located between the rollers 2 of the receiving roller cooler of the refrigerator (not shown), and the lever drive 3 of the valve lifting stationary straightening troughs 4, installed parallel to the valves and brake electromagnets 5, embedded under the first train of straightening troughs from prefabricated magnet 6 and excitation coil 7. Straightening troughs made of ferromagnetic material Parts of cast iron and trough of the first stream are composed of elements a and 7b with a longitudinal spruce on the bottom of the trough between the m-1Mi, wherein the water magnitopro- brake electromagnets} shot: --- vopolozhnymi poles are rigidly coupled. screws 8 with elements.

The device works on the next page (- image.

The ferromagnetic rolled strips from the mill are piece by piece with the rollers 2 of the receiving roller conveyor transported to the refrigerator. As soon as the predetermined position is reached relative to the refrigerator, the command is issued to I reset-brake, In this case, the lifting adapany 1 by lever actuator 3. by valves, its natural braking is carried out. When a strip hits the auto-leveling trough of the chute, the excitation catches 7 of the brake electromagnets 5 are turned on.

Lane, moving along the bottom. the first stream of the straightening chute, in contact with the supporting surfaces of the elements a and b% are

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S

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opposite poles of N and S brake electromagnet. The ferromagnetic strip is attracted to the bottom of the groove, as a result of which an intensification of braking forces is achieved, a normal con-, tact force and a slip friction coefficient increase. The force of forced electromagnetic braking is controlled remotely and is regulated by changing the amperages of the excitation coil of the brake electromagnets.

At the next discharge, the decelerated strips are removed from the first strand of the straightening trough from the brake electromagnet line by the rails of the cooler, and the next strip is fed by the lifting valves to its place and the process is repeated.

Such an embodiment of the device produces a high-velocity magnetic field, the magnetic flux of which closes through the rolling perpendicular to its axis. In order to saturate the rolled metal in the proposed device, significantly lower ampere turns of excitation are required. The dimensions of the magnetic sys- tem and the katupka of the excitation have no constructive, other limitations and do not determine its electromechanical characteristics (the magnitude of the brake reduction), hence this device has wide technological capabilities. The design of the device is simple and reliable in operation. The device is characterized by a rather high efficiency.

The implementation of the invention will allow to intensify the braking process of ferromagnetic rolled products on valve ejectors and thereby increase the productivity of the mill. Its introduction, for example, on a typical continuous small section mill 250 with one-valve diverters will increase the rolling speeds in the production of thermally hardened steel to 16.0-17.0 m / s.

Claims (1)

Invention Formula A device for braking the car on the refrigerator, containing lifting valves located between the rollers of the receiving roller of the refrigerator, the vertical straightening trenches and brake electromagnets mounted parallel to the valves. built in under the first stream of straightening gutters, which is different from the fact that, in order to simplify the design, to reduce metal and energy intensity, the flattening grooves  - 444010 The first stream is made of two elements with a longitudinal slit at the bottom of the gutter, while the brake electromagnets with opposite poles are rigidly connected with these elements. 40 / 1-A at L Schi 2