SU655449A1 - Apparatus for controlling the mechanism ejecting bars onto section mill cooler - Google Patents

Description

(54) DEVICE FOR CONTROLLING THE MECHANISM OF RESET OF BARS TO THE REFRIGERANT REFRIGERATOR

a - slowdown when braking the rod;

 the time of working out the reset command.

However, the limited functionality of this device does not allow a reset based on the bar speed.

The aim of the invention is an extension. rhenium device functionality, i.e. the creation of a device for controlling the mechanism of the discharge of bars onto the refrigerator of the section mill, which, with varying lengths of discharge bars and of different speeds, obtains a high accuracy of the bars on the refrigerator.

The goal is achieved in that the device is equipped with a frequency pulse generator, two splitters with adjustable division factors, a frequency divider factor of the first divider, a second divider factor determination unit, a key, an input register and a reversible counter which subtracts the input which is connected via the second frequency divider with the output of the input register, to the input of the pulse generator through the key in parallel. The inputs of the first frequency divider and the coefficient determining unit are connected The split input, the setup input of the first frequency splitter is connected to the output of the split ratio setting device, the setup input of the second frequency splitter is connected to the output of the division ratio determining unit 6, the control INPUTS key and input register are connected to the bar presence sensors via the control unit, the output of the first controllable divider medium: dinene with a summing input of a reversible counter, the output of which is connected to one of the inputs of the comparison unit.

The drawing shows a block diagram of an apparatus for controlling a bar reset mechanism on a refrigerator of the first camp. .

The device contains sensors 1 and 2 of the presence of rods 3 on the 4th line of transportation of rods 6 T OZHNITS 5 to XDilood 6 Sensors 1 and 2 of the presence of rods are connected to the input of the control unit 7, providing signals when crossing bars 3, controlled by sensors 1 and 2 , sections of the transport line 4, the outputs of the control unit 7 are connected to the control inputs of the accumulator 8, the key 9 and the input register 10. The output of the accumulator 8 and the output of the reversible counter 11 are connected to the inputs of the comparison unit 12, the output of which is connected to the input of the drive unit 13 - the bar reset mechanism. The output of the pulse generator 14 is connected to the key of the key 9, the output of which, through the first controlled frequency divider 15, is connected to the divider of the 16 division factor, which includes serially connected unit 17 for inputting the division factor, decoder 18 and block 19 of keys. The output of the input register 10 through a controlled divider 20 is connected to a subtracting input - reversible counter 11. To the installation input of the second controlled divider 20, a division factor determination unit 21 is connected, which contains serially connected counter 22, a decoder 23 and a key unit 24. A key output 9 is connected to the input of the counter 22. The sensors 1 and 2 of the presence of bars are spaced from each other at a distance b.

The device works as follows.

Before starting rolling, block number 17 is entered in block 17 for inputting the coefficient of setting of adjuster 16 of coefficient of division; it is proportional to the coordinate of the position of the front end of the bar on the refrigerator:

t - 4, t.

where Ld is the coordinate of the position of the front end of the bar on the refrigerator; LC - distance between sensors 1. and 2

The code of the number m through the decoder 18 and the key block 19 sets, by the installation input of the first controlled divider 15, the division factor equal to I1. Before starting the rolling of a new profile size, the input number 10 is also entered in the input register 10, which is proportional to the braking intensity of the given profile size;

 2s |

where 01 - deceleration when braking rods of this profile-size;

f is the frequency of the pulse generator.

In the reversible counter 11, in the initial state, the number K is written, which is equal to the time t of the drive for a reset command (i.e., the time from the reset command to start the braking). This number is constant for this drive.

Claims (1)

When the rear end of the cross-section bar, controlled by the bar 1 sensor, the control unit 7, crosses the signal, which enters the input of the key 9, opens it, and the generator pulses 14 arrive at the input of the counter 22 of the second controlled divider 21. The generator pulses, the passage to the summing input + reversible counter 11 is divided in block 15 by the coefficient t. In the counter-. ke 22 pulses accumulate. When the rear end of the cross-section bar reaches the transport line 4, which is monitored by the sensor 2, in the presence of bars, the signal at the control input of the switch 9 disappears. Thus, the passage of the pulses of the generator 14 to the inputs of the blocks 15 and 21 is prohibited. During the passage of the bar, the distances between the sensors 1 and 2 to the summing input + reversing counter 11 receive i-pulses, where P-ch pulses received at the input of the first divider This number is equal to Eg - the transport time at the speed of the front end of the bar from the cross section monitored by sensor 2 to the point that determines the coordinate of the position of the front end on the cooling circuit after braking. The number I recorded in the counter 22 is through the decoder 23 and the key block 24 sets the division factor of the second controlled divider 20, equal to C. Immediately after passing the back end of the cross-section bar, monitored by sensor 2, a signal is received at the control input of the input register 10 from the control unit, which triggers the input register 10. From the output of input register 10, a sequence of pulses is output, the number of which is N. After passing the pulses through the second controlled divider 20, the division factor of which is equal to and, on the subtracting input, the reversible counter 11 receives the number of pulses equal to the deceleration time t QpnpyTKa when it is reset: 1. JL-bLi tor-P-201I As a result, a reversible counter will contain a number equal to the calculated value of the setting to turn on the bar reset mechanism after crossing the front end of the bar of the cross section monitored by sensor 2 before the commands to turn on the drive of the reset mechanism. After the front end of the bar enters the sensor 2, the control unit 7 is output from the outputs one by one to the accumulator 8. The accumulator summarizes the pulse f of the generator 14. When the codes of the accumulator 8 are equal and the reversible counter 11, the comparison unit issues a command to the unit 13 of the drive mechanism for resetting the bars. The same signal also performs a reset of the circuit to the initial state, t sets counter 21 to zero and writes the number K to the reversible counter 11. The device operates similarly when resetting the next bar. However, if the bar speed before resetting 96 is ± iiV, then the number of pulses arrives at the inputs of blocks 15 and 21 when the bar LJ passes between the sensors 1 and 2 (E-dp. Thus, when the bar is reset to the fridge, the bar speed in front of Since the start of the countdown to the discharge starts at the end of the transport line, the factors affecting the transport time (bar length /., its acceleration time, the condition of the transport roller table) will not affect the stopping accuracy. control mechanism m dump bars on the refrigerator of the bar mill, including a control unit, to the input of which bar sensors on the bar transport line are connected to the refrigerator, storage device, comparator unit connected in series with the bar reset mechanism drive unit, in order to expand the functional capabilities of the device, it is additionally equipped with a frequency pulse generator, two frequency dividers with adjustable dividing coefficients, a unit for dividing the frequency of the first divider, unit for determining the division factor of the second divider, key, input register and reversible counter, the subtractive input of which is connected through the second frequency divider to the output of the input register, the inputs of the first frequency divider and the division factor determining unit are connected to the input of the pulse generator through the key the input of the primary frequency divider is connected to the output of the setting of the division factor adjuster, the installation input of the second frequency divider is connected; to the output of the ratio determining unit The control inputs of the key and the input register are connected via a control unit to bar presence sensors, the output of the first controlled divider is connected to the summing input of a reversible counter, the output of which is connected to one of the inputs of the comparison unit. Sources of information taken into account in the examination 1, USSR Copyright Certificate 395139, cl. At 21 at 37/00, 03/28/72, 1973.