SU778841A1 - Apparatus for detecting welded seams on unit for producing cold rolled stock - Google Patents

Description

pulses, the output of which is connected to the first input of the logic unit, the second input of which is connected to the output of the memory unit, the output of the logic unit is connected to the second input of the second pulse counter and the input of the first driver, the output of which is connected to the first input of the trigger, the second input of which is connected to the output , the first element OR, the first and second outputs of the trigger are connected respectively to the first input of the first element AND and the second input of the second element AND, the first input of the second element AND, the second input rtepBotb of the AND element and the input of the element is NOT connected to the OUTPUT of the second shaper, the input of which is connected to the sensor output of the Precise Indication, the output of the first element AND is connected to the first input of the second element OR, the output of the element is NOT connected to the first input 6 of the fourth element AND, the second and third inputs of which are connected respectively, with the first output of the trigger and the output of the second element OR, the second input is connected to the output of the third Element, the first input of which is connected to the first output of the trigger, the output of the second element OR, the output of the fourth ele The input And the output of the second element I and I are connected respectively to the inputs of the third, fourth and fifth drivers, the output of the third driver is connected to the first input of the first OR element and to the first output of the device, the outputs of the fourth and fifth drivers are connected to the second and third outputs respectively. devices 2,

The device allows to increase the accuracy and reliability of registration of welds in comparison with other izvv devices. - -

However, when using a known device, the registration accuracy of the seam depends on the speed of movement of the band in the upper section of the unit, because after the signal on the seam enters the tracking zone, the seam exit signal from the tracking zone is formed in time, rather than by reading the tolerance on the strip length. In addition, the speed of the strip in the same area of the unit may vary significantly, which may lead to a decrease in the registration accuracy of the welds and, consequently, a decrease in the productivity of the unit:

 The purpose of the invention is to increase the accuracy of weld registration and increase the productivity of the aggregate. The goal is achieved by the fact that a known device for registering welds on an assembly of production of a hub; Iodinekadaeya block rough indication of the weld, in which it consists of the first and

impulse sensors, first and second impulse counters, memory unit logic block, five shapers trigger, two OR elements, four AND elements, NOT element, seam accurate indication sensor, additionally equipped with a fifth AND element, setting the permissible deviation of the LENGTH of the strip, key the third pulse counter, the first and second inputs of the fifth element I are connected respectively to the output of the second pulse sensor and the first output of the trigger, the output of the fifth element I is connected to the first input of the third pulse counter, Torah input is output from the union of a key, the first and second inputs connected respectively to the output setpoint allowable deviation length of the strip and the output of the first AND gate, vyhodtretego .soedinen pulse counter with the second input element TpieTbero I.

The drawing shows a block diagram of the proposed device.

The device contains a coarse indication unit 1 (a weld seam comprising the first sensor 2 pulses, the output of which is through the first counter 3 pulses of the storing unit 4, the logic unit 5, the second counter of 6 pulses, the second pulse sensor 7 potentially associated with the first input of the second counter 6 pulses, the output of which is connected with the first input of logical logic 5, the second input of which is connected to the output of memory block 4, the output of logic block 5 is connected to the second input of the second counter 6 pulses, potential trigger 8, the first cat input connected to the output of the driver 9, the input of which is connected to the output of logic unit 5, the first element 10 OR is connected to the second input of the trigger 8, the first output of which is connected to the first input of the first element 11 And, the second output of the trigger 8 is connected to the second input of the second element 12 I, the first input of the second element 12 I, the second input of the first element 11 I and the input of the element 13 NOT, is connected to the output of the second generator 14, the input of which is connected to the output of the sensor 15 of the precise seam indication, the output of the first element 11 I connected to the first inputthe second element 16 OR, the output of element 13 is NOT connected to the first input of the fourth element 17 AND, the second and third inputs of which are connected respectively to the first output of the trigger 8 and the output of the second element 16 OR, the second input of which is connected to the output of the third element .18 AND the input of which is connected to the first output of the trigger 8, the output of the second element 16 OR, the output of the fourth element 17 I, the output of the second element 12 I are connected respectively to the inputs of the third, fourth and fifth formers 19, 20, 21, the output of the third driver 19 . connected to the first input, the first element 10 OR, and the first output of the device, the outputs of the fourth and fifth drivers 20, 21- are connected respectively to the second and third outputs of the device, the first and second inputs of that element 22 And are connected respectively, with the output of the second sensor 7 pulses and the first output of the trigger 8, the output of the fifth element 22 And is connected to the first input of the third pulse counter 23, the second input of which is connected to the output of the key 24, the first and second inputs of which are connected respectively to the output of the setting unit 25 timogo deflection strip length and the output of the first AND element 11, the pulse output of the third counter 23 is connected to the input of the third element vtorlm 18 I.

The device works as follows dim objpaaoM

Before starting the device, the setpoint 25 sets a predetermined number of permissible deviation of the strip length.

The device is started by applying a signal to the second input of the first element 10 OR, and the output of the OR element 10 is a signal that arrives at the second input of the key 24 and the permissible deviation of the strip length from the setting device 25 enters the counter 23, In addition, the signal arrives at the second input of the trigger 8 /, which causes the appearance of a signal on. the second exit of the trigger and the disappearance at the first exit of the trigger, and respectively at the second input of the fifth element 22 I.

When the band is moving, the pulses from the second sensor 7 arrive at the first input of the fifth element 22 I, however, there will be no signal at the output of this element, since there is no signal at its second input.

When the weld enters the tracking zone, a signal appears at the output of block 1, which through shaper 9 enters the first input of trigger 8. At the same time, the signal disappears at the second trigger output and appears at the first output. This will cause the appearance of a signal on the second input of element 22 I, and, therefore, in the third counter 23, the counting of pulses begins with a decreasing result.

When zeroing the third counter 23, which corresponds to the exit of the weld from the tracking zone, the output of the counter is a signal that arrives at the second input of the third element 18 I. Since the first input of element 18 And also has a signal from the first output of the trigger 8 , then at the output of element 18, a signal appears which, through the second

element 16 OR and shaper 19 is supplied to the first output of the device and to the first input of element 10 OR. In this case, a signal appears at the output of element 10 OR, and the further operation of the device is carried out automatically, similarly to the described process.

The signal from the sensor 15 accurate indication of the seam through the second shaper 20 is fed to the second input of the first element 11 And the input element 13

0 NOT and at the first input of the second element 12 and.

If before the signal from the seam accurate indication sensor 15 arrives at the first input of the trigger 8, the signal about the entrance of the seam to the tracking zone comes through the shaper 9, then the first output of the trigger 8 and the first input of the element 11 appears. . Since the second input of element 11 I receives a signal from sensor 15, a signal appears at the output of this element, which through the first input of element 16 OR and shaper 19 enters the first output of the device, which records the appearance

5 weld seam. The signal from the output of the imaging device 19 is fed to the first input of element 10 OR, and the device is prepared to monitor the next seam as described by the trigger.

0 Devices on a signal arriving at the second input of element 10. At the first input element 17 And the signal is not received, therefore, at the second output of the device there is no signal about

5 that the sensor 15 accurate indication of the seam does not work. If, during the time of the seam in the tracking zone, the signal from the output of sensor 15 does not arrive, then by the time the seam emerges from the zone of closure, all three inputs of element 17 appear and signals appear that cause a signal to appear at the second output of the device that detects a failure sensor 15. At the third output of the device, which registers a false memory of the sensor 15, the signal does not appear, since at the second output of trigger 8 and at the second input of element 12, there are no signals.

If the signal from the sensor output 15

0 appears before the appearance of the signal from the output of block 5, then the signals arrive at both inputs of the element 12 I and the third. the output of the device, registering the false alarm sensor 15

5 a signal appears.

The device can be performed on any series of logical elements.

The use of the device allows to increase the accuracy of registration of welds, which leads to an increase in

On the performance of units for the production of cold rolled steel.

The increase in the accuracy of the registration of the d-strip between the welds leads to the fact that the command for 5

The slowing down of the mill during the passage of the weld is more accurate and, consequently, the rolling time of the ShyatShtgvskblzka shortcut strip, by which the length recording accuracy is increased, is rolled at the operating speed and not at the speed of the weld seam.

The economic effect from the introduction of the proposed device on one mill is about 50 thousand b / y.

Claims (1)

1.Berzin V.A., Semichev V.N., System for automatic tracking of the position of welds in cold rolling mills, - Mechanization and automation of production, M., 1970, No. 1, p. 3-4. 2, USSR Author's Certificate 611696, cl. B 21 B 37/00, 1978.