SU623597A1 - Apparatus for control of roll stand speed of foil-rolling mill as function of preset foil thickness - Google Patents

Description

one

The invention relates to the field of rolling production automation and can be used to control the speed of the foil mill.

A known system for controlling the speed of the rolls of rolling mills 1 includes a drive motor, a speed meter of a drive motor connected to a first input of a speed controller, the second input of which is connected to a reference voltage setting circuit.

The closest to the described invention to the technical essence is the device for setting the speed of the rolls of rolling mills, allowing to set the speed of the rolls depending on the requirements of the technology. The device contains a relay amplifier with an adjustable feedback coupled to an integrate memory device connected to the speed controller of the drive motor.

A disadvantage of the known devices is that they cannot directly be used to automatically adjust the foil thickness.

The aim of the invention is to improve the quality of rolled metal and facilitate the work of the operator.

Claims (1)

The goal is achieved by the fact that the device for controlling the speed of the foil rolling mill stand as a function of a given foil thickness, containing a relay amplifier with adjustable feedback, connected to an integrating memory device connected to the speed controller, is additionally equipped with a foil deviation gauge the mill, the slowdown relay of the mill and the relay for switching on the regulator, the output of the meter measuring the deviation of the foil thickness from the given one is connected to the first input of the integrating memory The second input of the integrating relay through the first closing contact of the mill acceleration relay and the first closing contact of the deceleration relay are connected to the output of the relay amplifier, the second output of the integrative memory is connected to the second input of the relay of the deceleration relay. relay amplifier. 8, the first input of which through the second closing contact of the mill acceleration relay is connected with the output of the speed limiter. The drawing shows a structural diagram of the proposed device, where 1 is the unit of the rolling speed; 2-relay amplifier; 3 - integro memory device; 4 — limiting unit; .5 - drive motor speed controller; 6 tachogenerator; 7 - meter for deviation of foil thickness from the set one; 8 - leprosy rolls; 9 - drive motor; 10 - mill overclocking relay; 11 - deceleration relay mill 12 - switch on the controller. The speed of the rolls is maintained in accordance with a predetermined reference voltage Ugy coming from the integral memory of device 3. The thickness deviation meter 7 measures the thickness deviation from the target finished product. The signal from the meter 7 comes through a closing contact to one of the inputs of the integrative memory 3, which, if there is a constant voltage at its input, ensures the linear law of increase or decrease of the reference voltage, and the rate of change of the reference voltage in the acceleration mode and deceleration of the mill is determined the output voltage of the relay amplifier 2, which is regulated separately for the mode of acceleration and deceleration of the mill by the restriction unit 4, included in the negative feedback amplifiers 2, The azgon of the mill enters the relay amplifier 2, and through it - the integrator 3 from the unit 1 speed through the closing contacts of the relay 10 (which are switched, for example, with a key). The mill slows down when the relay contacts on the input of the integral memory of device 3 and in the negative feedback circuit covering the relay amplifier 2 and the integral memory device, in this case the reference voltage drops to zero. Stated with the speed of the mill at the opening of the contact is provided by a memorized integrative memory 3 voltage, In this case, the contacts PC and ES are open. When the contact of the relay of the VR signal proportional to the deviation of the measured foil thickness from the preset is closed, the meter 7 goes to the integrative device 3, the Reference voltage at the input of the speed regulator 5 will change until the deviation signal from the meter 7 becomes equal zero, and the maximum intensity of the change of the reference voltage will be at the maximum deviation signal. With a mismatch approach between the measured foil thickness and the set to zero, the intensity of the change in the reference voltage will be minimal. Claims An apparatus for controlling the speed of a foil rolling mill stand as a function of a predetermined foil thickness, comprising a relay amplifier with adjustable feedback associated with an integrating memory device, which is connected to a speed controller that is different. so that, in order to obtain a foil of improved quality, it is additionally equipped with a foil thickness deviation gauge from the specified one, a mill acceleration relay, a mill deceleration relay and a regulator activation relay, with the output f the foil thickness deviation measuring device from the predetermined device through closing contact with the controller switching relay contact, and the second input of the integrating device through the first closing contact of the mill acceleration relay and the first closing contact of the deceleration relay with dinene with the output of the relay amplifier, the second output of the integrating device through the second closing relay relay relay is connected to the second input of the relay amplifier, the first input of which through the second relay is connected to the output of the speed limiter, Sources of information taken into account during examination: 1, Garnov V, I, et al., Unified autorun systems for electric drives in metallurgy. Metallurgists, 1971, p. 98, 2, Journal of Electrical Engineering Industry, Vol. 3 (29), 1974, p. 25,  t ( -fch-g - one