JPS5884651A - Cutter for continuous casting installation - Google Patents

Abstract

PURPOSE:To permit cutting of an ingot to sure ingot length in desired positions by providing an arithmetic control means which determines the positions for measuring and cutting the ingot length from the relative position relations between the body of a cutter and the ingot. CONSTITUTION:An ingot 2 is transferred into an arrow direction, and when the preceding end of the ingot 2 arrives at a phototube 8, a detection signal is applied to a setting means 9 for correcting value and a gate circuit 14, which stores a position detecting value l' into a storage circuit 15. On the other hand, measurement is started with a length measuring roll 6 and an encoder 7, and a relative distance S is fetched with a counter 18 and is inputted to comparators 16, 19. A storage circuit 21 stores the cutting length L of the ingot 2 beforehand, and compares the cutting length L and the distance S in a comparator 20. Since the coincidence of the set value L and the measured value S indicates that the distance between a flowpipe 1A and the preceding end of the ingot 2 attains the cutting length L; therefore, the output thereof gives a command to a body 1 of a cutter through an output circuit 22, then the cutter starts cutting by the gas released from the flowpipe 1A and the oxygen supplied therefrom while traveling with the ingot 2.

Description

[Detailed Description of the Invention] The present invention provides a cutting device for continuous casting equipment,! This article relates to the cutting length of slabs and the control device for the cutting device itself.

Continuous casting equipment is equipped with a device that cuts all cast slabs produced continuously into predetermined lengths.

The main body of this cutting device measures a predetermined length with a cutting length measuring device, and once the cutting position is determined, it is clamped to a slab that is continuously produced as a member to be cut by Vc, and the speed of the slab is adjusted. Is the slab moving in sync and at the same speed? Cut the scraps. In this way, the cutting device It measures the cutting length of the slab and moves integrally with the slab, so there is no cutting FIjT operation, and after cutting, it returns to the original standby position 1 and starts the next cutting. Prepare for action.

Here, conventionally, the length of the cut slab is measured using a measuring roll installed on the ground side. In other words, when the measuring roll comes into pressure contact with the slab, the number of revolutions of the measuring roll accompanying the movement of the slab + % is extracted as a pulse number signal by the pulse pink amplifier (2, this pulse control all photoelectric switch 7fVcL restart By counting the length using a counter, the length of the cutting device is clamped to the slab from a predetermined position, and the gas blowpipe is placed at a predetermined cut point to cut the slag. Therefore, the cutting device main body repeatedly returns to its original standby position (origin) after one cutting operation, which lengthens the cutting cycle. Therefore, complicated control means and detection means are required to completely and reliably control the return to origin.

The present invention provides an arithmetic control means for providing a measuring roll in the main body of the cutting device, and calculating from the relative positional relationship between the sub-length of the slab length and the total cutting position (m) of the main body of the cutting device. By providing the main body of the cutting device, the entire origin 4 can be placed at any position and the slab can be cut to a certain length, and the cutting cycle is z; i, 1 m 'c.
To provide a cutting device that can purpose.

Is the drawing below? An embodiment of the invention with reference? Explain in detail.

Cutting device body/is gas soft pipe/A? +7, it is possible to control the running of the kite rail 3 parallel to the running of the slab λ.
Ru. Cast slab 2Fi roll ≠ 1 to ≠ 5 Feed from left to right in the whole figure. An inductive encoder S is connected to the wheels /B of the cutting device main body l, and the position on the kite rail 3 is detected as a pulse number signal of the inductive encoder S. Further, a measuring roll 6 for the slab 2VC is applied from the main body of the cutting device, and the rotational speed of the measuring roll 2, that is, the relative position between the main body and the slab λ is detected by an inductive encoder 7 as a pulse number signal. Since the inductive type encoders S and 7 are of the inductive type, they have excellent durability even in high temperature and humid environments, and can achieve accurate distance detection without using a cooling means or the like.

Assuming that the cutting length of the slab λ is long, a phototube is provided at a distance Q (reference length) behind L as the counting start point for measuring the length of the slab, and the phototube gvc is connected to the skin edge of the slab 2. detected. The distance Q is set to the distance between the photocell and the gas soft tube when the main body returns to its origin with zero error.
, is set manually by the correction value setting means 9. The backward limit position (point 0fjL) of the cutting device main body is detected by its detection limit switch io, and one of the stop commands for the device main body is detected.
be made into For the running of the cutting device body, an analog-to-digital converter takes out a Barne frequency signal proportional to the output of the encoder j.
, is taken out as the count value of the counter by counting manually, and is fL.

For the counter, use the above standard length t or Priscella in advance.
1. b 0 Prior to length measurement, place the cutting device main body/(2-force unloading starting point) at 1 point (in the traveling direction of the slab λ) from the photoelectric/uza than the The reference length is pre-sensed to the counter 12, and when the reference point of the encoder s2 body passes through the photoelectric front position IT, it is automatically or manually moved to the position of the cutting device body/ligature origin (limit switch 10) as an output occurrence state. The machine is moved backward, and the main body of the machine is stopped by operating the switch 10. At this time, as the wheel /B rotates, the contents of the counter /L2 are subtracted from the set value a by the actual measured distance.

By the way, the main body of the cutting device is not precisely stopped at the original position, and there is a slight error of ±α.

For example, if the counter set value a is: 300 m and the encoder's total value is 28 (), then the error α is +
20 becomes 1 This error is the error at the next sub-length and 'y,
6o Therefore, in the present invention, the error α is fully corrected to obtain an accurate 41
1] In order to minimize the length and cut, the error ±α appearing on the counter 12 is used as the correction amount of the correction setting means 9, and the error ±α is subtracted from the set value 2 to detect the position of the main body. Q
'(=U±α). That is, with respect to the reference length C, the blizzard position of the cutting device main body at the time of dust is detected relative to the position of the phototube.

In this stage prepared for length measurement, the slab 2 is fed to perform the first length measurement and cutting. When the continuous casting equipment starts operating and the slab 1 is sent from the roll 4t1 side to the side, when the tip of the slab λ reaches the count start point (photocell 2nd position f), the detection signal is sent to the input circuit/ Correction 11 as a count start command through Ji Setting means 9 and gate circuit/
given to Q. The correction value setting means stores the detected position value α' in the entire storage circuit 15 in response to a count start command. The gate circuit /4' opens the gate v in response to a count start command and supplies the contents e' of the storage circuit 15 to the full comparator 16.

On the other hand, a measuring roll 6 and an encoder 7 engage the slab λ and detect the relative distance sy between the cutting device main body/and the hook piece λ.
The measurement starts from the time when the tip of the slab λ can be detected by the phototube, and the output is expressed as tl - number f [of the counter/g
The relative distance S is taken out as t/C. The content S of the input +7 counter 1g is made the comparison input of the comparators /6 and /9. The comparator 16 compares the detected position value t' and the relative distance S, and when they match, that is, when the tip positions of the soft pipe of the cutting device body and the tip of the slab 2 match, the matching output of the comparator 16 causes the gate circuit to be activated. , 20 Games By-Keep Open/). At the same time gate circuit l
The computer is closed and the contents of the memory circuit 15 are erased.

The memory circuit 21 stores the cutting length of the slab in advance.
gn, the contents of which are compared to the open sound comparator/q of the gate circuit J. Comparator /q compares the cutting length with the relative distance S from a given point in time.

In other words, at the start of this comparison, the tip of the slab λ has reached the position hVc where it has been fed in the right direction by V' from the photocell g position ↑k, and the blowing snow / A position of the cutting device body / has reached the position hVc. It means that one end is matched.

In addition, the comparison of the comparator /q from this state is a comparison of the relative distances S' and L that increase as the feed rate of the slab increases with the initial value of the relative distance between the slab and the main body being 0. become. This relative distance S' is the coincidence output of the comparator // and the counter /S
Is it okay to use a counter that resets -H and is a different counter from the counter /8? It is also possible to provide an output 4 of the encoder 7 and start counting the output 4 of the encoder 7 from the coincidence output of the comparator/l.

In the comparator 19, when the set value and the measured value S' match, this means that the distance between the soft pipe and the tip of the west bank has reached the cutting length, and the matching output is the Nil notation output that resets the counter ig. A cutting operation start command is given to the cutting device body through the output circuit 2'i. The main body of the cutting device during the period
In response to this command, the arm part (not shown in figure 1) grips the slab 2 while it is running, and with the sound of the fishing piece, the running sound begins.
Cutting due to scum release and oxygen supply? Start. After this cutting is completed, the cutting device main body is controlled to move backward toward the origin, and at the same time returns to the next cutting location by the return length sub-length.

Assuming that the cutting is completed in the above-mentioned round or at the waste blowpipe position P2, the cutting device main body/■2 clamp with the slab is released and control starts returning from the P2 position, but the return is It stops at a relative distance from the slab d that is shorter than the cutting length, and waits until the measured length reaches the cutting length. This standby position is not limited to the origin but may be any position. 2
The subsequent length measurements are performed as follows.

When the first cutting command is issued, the counter IS is also reset, and since the main body and the slab move together in the subsequent cutting operations, the counter S is reset when the cutting is completed. There is no counting input until one half λ is separated, and the state is still the same as the reset state. When the main body moves in the opposite direction after cutting is completed, the relative distance to the slab λ is detected and measured by the measuring roll 2, and the main body is controlled to stop when the measured length is less than the cutting length. , When the contents of the 8 counter/g reach the cutting length as the seven-edge slab moves, a cutting command is issued? Then, the sound of clamping and cutting the slab 2 starts. This length measurement control can be achieved by comparison using the comparator 19, or by providing another comparator. Therefore, the second and subsequent cutting starts from the point when the main body is separated from the slab after cutting is completed. This is done based on the measurement of the relative distance S between the two, and includes a counter, a correction value setting means D, and a memory circuit B.
, comparator 76, and other control circuits cannot be used.

It goes without saying that each circuit in the figure could be replaced with program control by a microcomputer or the like to increase its versatility.

As described above, the present invention has the advantage that it is possible to measure and cut from any position without requiring the main body of the cutting device to return to its origin after each cutting operation.
Is there a way to accurately return the entire body to the origin for the first cutting? Without the need for automatic correction teeth for errors, accurate cutting lengths can be achieved, cutting cycles can be shortened, and slab feeding speed can be increased.

BRIEF DESCRIPTION OF THE DRAWINGS The drawing is a block diagram showing an embodiment of the present invention. /...cutting device main body, /A...waste soft pipe, co...
Slab, 4L1 + 4t2 + "' + "5...Roll, 3.7...Infection, shape encoder, Otsu...Measuring roll, Ni...Phototube,?・Correction value setting means, 10...
Limit switch, //, /7...Analog-digital, /2, /Za...Counter, /lI,
20... Gate circuit, /, S, , 2/... Storage circuit, #, /9... Comparator.

Claims (2)

[Claims] (1) In a cutting device that runs integrally with a slab that is being moved at full speed on rolls and cuts the slab into a predetermined cutting length (L) dimension, there is a 1 encoder and a measuring roll that engages with the slab from the cutting device main body? A second encoder for detecting the relative distance between the cutting device main body and the slab, and a reference length between the counting start point set on the ground side and the scum snowfall when the manual cutting device main body is returned to the origin. CQ) is set and the main body of the cutting device is returned from the current position to the origin, a first counter from which the measured distance is subtracted from the first encoder output, and a value of the first counter after the subtraction is completed. a correction value setting means that adds or subtracts the above reference length (Q,) to calculate the entire actual distance between the falling snow of the cutting device main body that has returned to its origin and the above counting start point, and counts the output of the upper 6-pin second encoder. A second counter as an input, a count value of the second counter from when the tip of the slab reaches the counting start point, and the correction 1i [a first detecting that the output of the setting means matches] When the count value of the second counter and the manual cutting length (L) match from the point of time when this comparator matches, V (gives a clamping and cutting start command for the cutting device main body and slab. A cutting device for continuous casting equipment, characterized in that it is completely equipped with a second comparator. (2) % allowance 81! In the first section of the ice range, when the cutting device main body releases the clamp from the slab after the first cutting is completed, the entire return distance from the output of the second encoder to the origin side of the cutting device main body is measured. Then, the cutting device body is stopped at a position where this return distance is less than the cutting length (L) relative to the slab, and from then on, when the slab reaches the cutting length (L) by traveling, the cutting device is cut. The device itself? Cutting device fM for continuous casting equipment that performs repeated control by clamping onto the slab and performing the second and subsequent cuts.