RU34542U1 - Electroslag die casting process control device - Google Patents

Description

A process control device for electroslag chill casting.

The invention relates to the field of electrometallurgy and can be used for electroslag chill casting.

It is known that a device for controlling the rate of deposition of a sacrificial electrode during electroslag remelting contains a programmer, a gain system, a mechanism for vertical movement of the electrode, and it is equipped with a rheostat, tachogenerator, thyristor converter, and electrode rotation mechanism, and the tachogenerator is mounted on the vertical electrode movement mechanism and is connected to the movable contact of the rheostat and the first input of the program setter, the rheostat is connected by its fixed contacts to the floor the voltage source, one of the poles of the voltage source is connected to the second input of the software master, the output of which through the amplification system is connected to the control input of the thyristor converter, the outputs of which are connected to the electrode rotation mechanism. RF patent No. 2090636, IPC; C 22 V 9/18; publ. 09/20/97, bull. Number 26

The well-known "Method and device for magnetically adjustable electroslag remelting of titanium or titanium alloy, in which the hydrodynamic structure of the ingot along its entire length is affected by a radial magnetic field, while creating an interlayer and

g 003123932

IPC: with 22V 9/18,

C 21C 5/52

meridial toroidal rotation of the melt and improves metal refining and its uniformity.

US Patent No. 6113666A, IPC: C 22B 9/18, publ. ISM No. 9 - 2001 48 The closest to the claimed technical solution is “Electroslag remelting process control device, comprising a control unit, the first output of which is connected to the current regulator and the electrode motor in series, the third output is connected to the voltage stage switch and the power transformer in series, and an active power sensor the first input of which is connected to the measuring transformer, the second input is connected to the winding of the power transformer connected to an electrode and a crystallizer, and the output is connected to the fourth input of the control unit, the current sensor, the input of which is connected to the measuring current transformer, the first output is connected to the current regulator, and the second output to the fifth input of the control unit, the electrode rotation control unit of the electrode, the input of which is connected with a sensor for moving the electrode, and the first and second outputs are connected to pulse counters of the forward and backward strokes of the electrode, moreover, it additionally contains an electrode position analyzer, a threshold current switch a, a voltage sensor, while the inputs of the electrode position analyzer are connected to the counters of the forward and reverse pulses, and the first and second outputs are connected to the first and second inputs of the control unit, the input of the threshold switch is connected to the second output of the control unit, and the output to the third input current regulator, the input of the voltage sensor is connected to the winding of the power transformer.

5; -2 connected to the electrode and the mold, and the output - with the third input of the control unit.

RF patent No. 2052509, IPC: 6 C 22 V 9/18; With 21C 5/52 publ. 01/20/96 bull. Number 2

The technical result includes an increase in the quality of the obtained ingot, namely, its refinement and uniformity due to the improvement of the electrode control circuit, as well as an increase in the safety level due to the introduction of alarm equipment into the control device, as well as the introduction of voltage stabilizers and microchips in the comparison circuit.

This result is achieved due to the fact that the process control device for electroslag chill casting contains an electrode displacement motor, a current sensor, power and measuring transformers, and a control unit for the elements of the device. The device element control unit includes a voltage level comparison and conversion circuit and an electric motor control circuit. In addition, the electroslag chill casting process control device is equipped with switching and alarm equipment. The electric motor control circuit is equipped with a thyristor converter and a filter, and the comparison circuit is equipped with a current regulator signal pickup unit when the arc breaks, a node for limiting the maximum signal level to trigger the electrode, a node for limiting the electrode lowering-raising, and also voltage regulator circuits. The control unit is connected by direct and feedback to the current regulator and the controller of the dead zone of the electrode.

The process control device for electroslag chill casting is illustrated in the drawing of Fig. 1 and contains a crucible 1, an electrode 2, an electrode displacement motor 3, a current sensor 4, a power transformer 5, a measuring transformer 6, a current regulator 7, a zone controller for the non-sensitive electrode 8, block h the elements of the device for controlling the process of electroslag chill casting, containing a circuit for comparing and converting the voltage level I with the node for removing the current signal when the arc is broken 9, the node for limiting the maximum ovnya signal on the trigger electrode 10, the shutter unit limitations - lifting of the electrode 11 and voltage regulators circuit 12, and the motor driving circuit P, comprising a thyristor converter 13 and filter 14, and a control device is provided with switching apparatus 15 and the alarm 16.

The process control device for electroslag chill casting works as follows: from the control panel of the switching equipment 15, a signal is transmitted to the electrode 3 moving motor, at the same time, a signal is transmitted to the current sensor 4 and power 5 and measuring 6 transformers. The control signal 15 receives an inverse signal proportional to the arc current and voltage at the electrode 3, described by the following equation:

Hades - b () d + 1 back) AU where

a, b - proportionality coefficients

id - voltage at the electrode 1d - arc current 1set - set arc current (set by the current regulator)

To ensure automatic ignition of the arc at Td 5% J d nom1 back O

zi - if the error signal is greater than the USH signal set by the sensitivity controller 8, then a control signal appears at the output of the control unit

yiwu di out

which enters the motor control circuit 3 to the input of the thyristor converter 13 and the filter 14 as a signal of a given rotation speed of the electrode 3 motor, the thyristor converter is provided with negative voltage feedback with the armature of the electric motor 3, while the signal from the zone controller is insensitive / hectare of the electrode 8 signal also enters the circuit for comparing and converting the voltage level I of the control unit, namely, to the node 9 for removing the current signal when the arc is broken, to the node 10 for limiting the maximum match signal at the electrode slope, in the shutter unit 11 limits - lifting of the electrode and the chip stabiilzatorov voltage 12, the signals generated are analyzed and appropriate commands.

Claims (1)

A process control device for electroslag chill casting comprising an electrode displacement motor, a current sensor, power and measuring transformers and a device control unit comprising a circuit for comparing and converting voltage levels and an electric motor control circuit, characterized in that the process control device for electroslag chill casting is equipped with switching equipment and alarm, while the motor control circuit is equipped with a thyristor converter the circuit and the filter, and the comparison circuit is equipped with a node for removing the signal of the current regulator when the arc breaks, a node for limiting the maximum signal level for lowering the electrode, a node for limiting the lowering and raising the electrode, as well as voltage regulator circuits, in addition, the control unit is connected by direct and feedback to the controller current and the controller dead zone electrode.