SU1407705A1 - Apparatus for controlling the arrangement of saws for hot cutting of rolled stock - Google Patents

Abstract

The invention relates to the processing of metals, in particular, to abrasive-roll control devices. The goal is to improve the accuracy of the device. by taking into account temperature changes of the length of the roll. The device contains a pulse generator connected in series, a divider, a reversible pulse counter, a comparison node. The input of the unit for calculating the dimensional lengths is connected to the output of the roll length meter. A temperature sensor, an analogue converter — a code, the first and second metal presence sensors, the first and second basic saw position sensors, a subtractor, and a saw control pulse sensor are entered into the device. The multiplier is used to calculate the change in the length of the rolled product as the temperature changes. If there is an imbalance between the code value obtained in the multiplier and the number of pulses in the reversible counter in the comparison node, a signal is generated that enters the saw control node. 1 pe. c (O (L

Description

about

SP

The invention relates to the processing of metals, in particular, to control devices for rolled steel.

The purpose of the invention is to improve the accuracy of the device by taking into account temperature changes in the length of the roll.

The drawing shows the functional diagram of the device.

The device contains a temperature sensor 1, an analog-2 converter — a code, the first 3 and second 4 metal presence sensors, a multiplier 5, a unit for calculating lengths 7, a length meter 7, a comparison node 8, a saw control node 9, a generator 10, a divider 11, reversible counter. 12 pulses, sensor 13 pulses, subtractor 14, switch 15, first 16 and second 17 basic sensors.

The output of the temperature sensor 1 through the converter 2 analogue - the code is connected to the first input of the multiplier 5,

The output of the generator 10 pulses through the divider 11 is connected to the first input of the reversible counter 12, the output of which is connected to the first input

node

comparisons associated with the output from the control unit 9 with the saws.

The outputs of the first 3 and second 4 metal presence sensors are connected to the second inputs of the multiplier 5 and the comparison node 8, respectively.

The outputs of the first 16 and second 17 basic sensors are connected respectively to the first and; second inputs of the switch 15, the output of which is connected to the first input of the subtractor 14

The output of the saw control unit 9 is connected to the input of the pulse sensor 13, the output of which is connected to the second input of the reversing counter 12.

The output of the length meter 7 is connected to the input of the unit 6 for calculating dimensional lengths, the output of which is connected to the third input of the multiplier 5 and the second input of the subtractor 14 connected to the second input of the divider 11. The output of the multiplier 5 is connected to the third input of the comparison node 8.

The device works as follows.

According to information; arriving from the length meter 7 in the unit 6 for calculating the lengths, the measurement of the lengths of rolled products is performed. The roll, from which the measured lengths are cut, is fed to the saws by a roller table (technological

some equipment is not shown). When the roll reaches the first metal presence sensor 3, its temperature measurement is started by the temperature sensor 1. The temperature information is converted into a code by a converter 2 analogue code and fed into a multiplier 5. In multiplier 5, the change in the length of the rolled product l 1 from the change in temperature and T is calculated

0

five

0

five

ul C-ob-T, (T, - TJ,

where LJJ is the specified rolled length in the cold state at the temperature

TO TO, mm;

T, is the temperature of rolling a in the hot state, C; TO is the temperature of rolled products in the cold state, C;

ui is the linear expansion coefficient, 1 / ° C.

Since temperature. T and linear expansion coefficient oi are 5 constant values, to determine the change in length M it is sufficient to know the temperature of the rolled metal T, in the hot state.

From the output of the multiplier 5, information arrives at the node 8 of the comparison. When the front end of the roll reaches the second sensor 4, the presence of metal installed in front of the saws, a signal is sent to compare the code received from multiplier 5 with the code contained in the reversible counter 12 pulses.

The initial number of pulses into the reversible counter 12 pulses is recorded from the pulse generator 10, which delivers calibrated pulses through divider 11. The divider ratio 11 is determined in subtractor 14 and its value depends on the difference D1 of the rolled products in the cold state Lg and at fixed temperatures L ,. or lt.

Information about the length of the rental enters the subtractor 14 from the block 6 for calculating the lengths of the length, and the values of the length 0 for rental at fixed temperatures correspond to the installation site of the basic sensors 16 and 17, the outputs of which through the switch 15 are connected to the subtractor 14.

5 If there is an imbalance between the code value obtained in multiplier 5 and the number of pulses in the reversible counter 12 in the comparison node

a signal is generated which is output to the saw control unit 9 to start the saw moving motor.

With the motor of movement of saws, a sensor of 13 pulses is kinematically connected. When the engine is turned on, the pulses from the latter enter the reversing counter 12, in which they are added or subtracted from the value that was previously in it. When the number of pulses in the reversible counter 12 becomes equal to the multiplier code 5, a command is sent to the saw control unit 9 to stop the displacement motor.

Since over time, an error can accumulate in the reversing counter due to the error of the sensor 13 pulses, each time the saw passes by the base sensors 16 and 17, the contents of the reversible counter are reset and a new value is set, exactly corresponding to

basic sensor,

Claims (1)

Formula isobteni A device for controlling the arrangement of sawing hot-rolled saws, containing a pulse generator, divider, reversible pulse counter, comparison unit,, saw control unit, measuring length calculation unit, multiplier, switch, with pulse generator, divider, reversing pulse counter, comparison node 0 five 0 five the saw control unit is connected in series, and the input of the unit for calculating lengths is connected to the output of the roll length meter, which is often due to the fact that, to take into account the temperature changes of the roll length, a temperature sensor is inserted into it, Analogue converter - code, first and second base sensors. saw position, subtractor, pulse sensor, saw control unit, first and second metal presence sensors, while analogue converter is connected to the temperature sensor output - code whose output is connected to the first input of the multiplier, the output of the first metal presence sensor is connected to the second input the multiplier, and the output of the second metal sensor to the second input of the comparison node, the outputs of the first and second base position sensors of the saws are connected respectively to the first and second inputs of the switch, the first input of the subtractor is connected the switch output, the output of the subtractor is connected to the second input of the divider, the input of the pulse sensor is connected to the output of the saw control unit, and its output is connected to the second input of the reversible pulse counter, the output of the measuring length calculation unit is connected to the second input of the subtractor and the third input of the multiplier, the output of which is connected with the third input of the comparison node.