SU99127A1 - Device for automatic control of rolling mill press mechanism - Google Patents

Description

The subject of the invention is a device for automatic control of a rolling mill press mechanism, comprising a tacho regenerator controlling the speed of rotation of the rolls and switched on on the day of controlling the reversing motor moving the upper roll of the mill.

The proposed device is more sophisticated than the known devices of the X type, since it maintains the constant thickness of the rolled strip when the rolling speed changes by automatically changing the distance between the rolls of the rolling mill. This is achieved by drawing up a control circuit of a reversible motor that moves the upper roll of the mill from two nodes that work together through an abundant amplifier on a relay that controls switching the direction of rotation of the motor. One of these nodes consists of a tracking system in the form of an electronic bridge, the two arms of which are formed by a rheostat position sensor of the upper roll, and the other two arms

a rheostat practicing the position specified by the indicated sensor during periods of high rolling rates. Another ccjCTOirr node from the tachogenerator, potentiometer, creating a voltage in the circuit of this node, directed to meet the voltage of the tachogenerator, single-wave rectifier, 15klc) of a chain sequence, which is excited by a different circuit, and aroused by the isother pattern. and controlling the switching of a bridge organ of the bridge and connecting it together with the output of the second node and the input of the common ycH.iIntel.

The drawing shows a schematic electrical diagram of the proposed device.

The following system of the device, which controls the position of the upper roll (the first node of the circuit), is made in the form of an electronic bridge, the shoulders of which are composed of two resistance sensors CP and SP, and the electronic amplifier E1 is connected to the diagonal through the relay P contact.

The CP sensor is connected by means of a gearbox with a gear mechanism

rolling mill. A reversible motor RD is connected to the output of the electronic amplifier EU1, which moves along the slider of the resistance sensor ZR. As the upper roll moves alternately, the slider of the CP sensor changes its position, which in turn causes a voltage of debalais in the diagonal of the bridge; at the same time, the taxiway driver, which interleaves the slider of the RR sensor to reach 1 a1 and 1 all the shoulders of the bridge, is throttling. Thus, on the pp-apnaya pavement, s.heme lri. High (.) Th CKOjJocTH, rolling the sensor ZR will work for the sensor CPp.to.zhenie and s.chidit for alternating the licpxneio roll and on .zhiIgo stroys | gva.

The system, c. 1 and; and after the change in the rolling speed (the second node of the scheme), consists of a TG-mounted tachoheperator, the voltage of which is compared with the correct voltage taken from the potentiometer P.

A half-wave rectifier m and C and a relay P, which is excited by the difference of voltages AU and G of the generator and potentiometer I, are successively included in the circuit of this circuit.

The difference between the substs has also been applied to a notnotometric resistance of the UE, connected in series with the diagonal of the bridge circuit, consisting of CP VI VI ZR sensors, to the input of the common electrostatic amplifier EU2. In this case, the relay P controls the switching of the zero organ of the bridge, made up of sensors CP and SP, and connecting it together with the output of the TG generator system to the input of the EU2 amplifier.

Mount the output at the output, l ЭУ2 included a polarized relay РДв, management, Я1ОИ1, its work is reversible, moving the pressure mechanism of the rolling mill.

The voltage taken from the potentiometer I sets the speed of the camp, which the proposed control device is idle. This is due to the fact that the deformation of the stand with a change in the rolling speed occurs only at relatively low speeds. Contact K, installed in the circuit of the katunp {and the relay P, provides the possibility of turning on and off by the mill of the proposed automatic device.

Subject invention

The D.1I device is automatically controlled by the rolling mill press mechanism, 1, its tachogenerator controlling the speed of rotation of the rolls and including in the control circuit of the reversing motor moving the upper mill roll, in order to maintain the thickness of the rolled strip when the rolling speed changes , the guide and the control circuit are made up of two nodes, working together through a common amplifier) ia relay, controlling the transfer of the direction of the engine1, en11 engine, n consisting of: The din node is from the following system in the form of an electron bridge, the two arms of which are formed by a rheostat sensor, the floor of the upper roll, and two other arms, a rheostat, working on the position specified by the indicated sensor during periods of high rolling speed, and the other node from the tacho generator, a potentiometer that generates a voltage in the circuit of this node, directed towards the voltage of the tachogenerator, a half-wave rectifier connected in series to the circuit of this circuit, and a relay excited by the difference of the tachogenerator voltages ora and potentiometer and control switching bridge zero body and connecting it together with the second output node to the input common amplifier.