SU474365A1 - Device for stopping the rolling stock - Google Patents

Description

one

The invention relates to the field of ferrous metallurgy, in particular, to the cutting of metal in a mill stream.

A known control digital computer for cutting metal consisting of a memory with a buffer memory unit, a computational node, a control device and an output device in the form of a perforator.

However, the known device does not provide the required stopping power of the metal for its cut.

The purpose of the invention is to increase the accuracy of metal stopping under its cut.

For this purpose, the optional device is equipped with a summing operational amplifier, the inputs of which are connected to the output of the memory unit and the output of the tachogenerator of direct current, and the output to the input of the unit for issuing a command to the braking.

The drawing shows a block diagram of the proposed device.

It contains a length measuring unit 1, a memory unit 2, a rolling profile selection section 3, a summing node 4, a rolling speed photo relay 5, and a braking command issuing unit 6.

The device works as follows.

The output of the roll out of the last finishing stand is triggered by the photo relay 7 (F1 - contacts of the photo relay 7), which takes the amplifier 8 to the integrator mode. Its input receives two input signals of different polarity. The signal from condenser 9 is the base distance, and the signal from source 190 through normally open contacts 10 of photo relay 7 is the value of base distance, taking into account the actual rolling speed.

When the photo relay 11 is turned on (Fa - contacts of the photo relay 11) of the amplifier, output 8 receives a voltage proportional to the difference between the calculated speed and the actual one.

The voltage obtained through the capacitor 12 is fed to the input of the amplifier 13, which carries out the correction, which is the error of the calculated speed with respect to HieHiuo to the actual.

At the inlet of the dispatcher, 14 and after the passage of the roll, a folder is received, proportional to the tail part of the roll.

The received signal enters memory block 2, where capacitors play the role of memory cells, and their switches are annular thyristor counters. A constant voltage equal to the base distance is entered into the intermediate memory block.

At the approach of roll to the photo relay 15 (Fz - contacts of the photo relay 15) signal equal to the length

roll, enters the rolling profile selection unit 3, where it is converted into reduced relative weight. When photo relay 16 is actuated (F4 contacts of photo relay 16), the signal enters summing node 4, where two signals of different polarity are summed, one of which is the reduced rolling weight, and the second is the reference voltage taken from the divider 17.

When photo relay 18 (FB contacts photo relay 18) is triggered, the input of block 6 receives a signal that carries information about the current rolling speed and a signal that takes into account changes in the rental weight relative to the rollers of the roller table.

At the output of the amplifier 19 operating in the integrator mode, a polarized relay 20 is turned on.

When a positive voltage is exceeded with the amplifier 19, the magnitude of the positive voltage from the divider 21 of the relay is turned on and gives a signal for dynamic braking.

The use of this device increases the accuracy of rolling stops, increases productivity and improves the quality of cutting.

Subject invention

A device for stopping the rolling stock containing a metal photorelay, a brake command issuing unit, a length measuring unit, a memory unit, characterized in that, in order to increase accuracy, it is additionally equipped with a summing operational amplifier, whose inputs are connected to the output of the memory and the output of the tachogenerator of direct current, and the output - with the input of the unit issuing the command for braking.