CN110871221B - Method and device for preventing coiler from steel scrap - Google Patents
Method and device for preventing coiler from steel scrap Download PDFInfo
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- CN110871221B CN110871221B CN201811005100.8A CN201811005100A CN110871221B CN 110871221 B CN110871221 B CN 110871221B CN 201811005100 A CN201811005100 A CN 201811005100A CN 110871221 B CN110871221 B CN 110871221B
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- pinch roll
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- side guide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/02—Winding-up or coiling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C47/00—Winding-up, coiling or winding-off metal wire, metal band or other flexible metal material characterised by features relevant to metal processing only
- B21C47/26—Special arrangements with regard to simultaneous or subsequent treatment of the material
- B21C47/267—Scrap treatment
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Abstract
The invention discloses a method and a device for preventing coiler steel scrap, which at least comprise No. 1 and No. 2 coilers, wherein in the process of coiling a steel strip, when the No. 1 coiler is preselected, the steel strip sequentially enters a coiling position through a No. 1 side guide plate and a No. 1 pinch roll; when the No. 2 recoiling machine is preselected, the steel strip enters a coiling position through the No. 1 side guide plate, the No. 1 pinch roll, the No. 2 side guide plate and the No. 2 pinch roll in sequence; the method comprises the following operation steps: 1. f1 stand of finishing mill group bites steel; 2. f1 steel biting signals are uploaded to an upper computer; 3. the upper computer sends the target thickness and the target width of the strip steel to a coiling basic automation computer; 4. the coiling basic automation computer sets the initial opening of each side guide plate and the initial roll gap of each pinch roll according to the target thickness and the target width of the strip steel; and then, the opening change of each side guide plate, the roll gap of the steel biting pinch roll, the pinch roll pressure control and the like are further controlled by detecting the turning-up and sleeve-up conditions of the head of the strip steel, selectively controlling and pre-selecting the coiling machine according to the detection conditions.
Description
Technical Field
The invention relates to a hot rolling process, in particular to a method and a device for reducing steel scrap coiling accidents caused by turning over of a strip steel head or collision of the strip steel head with a guide plate sleeve.
Background
The coiler is an important apparatus of a hot rolling line for coiling a hot rolled strip into a steel coil. The coiler is located behind the finishing mill group and is the last process of the hot continuous rolling production line. Referring to the main equipment structure of the coiling machine shown in fig. 1, a strip steel 1 is conveyed from a finishing mill group to a coiling machine group through a roller way, and enters a pinch roll 3 No. 1 after being centered by a side guide plate 2 No. 1. The pinch roll mainly has the functions of applying a certain clamping force to the strip steel at the head steel biting stage and simultaneously performing first bending deformation on the strip steel; and applying stable tension to the strip steel in the tail coiling stage to ensure good coil quality. The three wrapper rollers help to bend the strip steel and tightly wind the strip steel on the winding drum. After the strip steel is wound on the winding drum, tension is applied to the strip steel to ensure that the winding quality is qualified. To ensure continuous and uninterrupted production, a hot rolling line is usually equipped with two recoiling machines, wherein, the No. 2 recoiling machine is equipped with a No. 2 side guide plate 4 and a No. 2 pinch roll 5.
In general, two kinds of abnormal threading situations often occur when the head of the strip steel 1 is conveyed from the finishing mill group to the coiler group by the roller way:
1. the head of the strip steel is turned up.
Referring also to fig. 1, when the thin strip runs on the roller table at a high speed, the strip head 11 may be turned up due to the influence of the difference in the shape of the strip or the air resistance.
2. The head of the strip steel impacts the guide plate to be sleeved.
Referring to fig. 2, the head of the strip steel with the sickle bend is easy to hit the No. 2 side guide plate 4, so that the head 11 of the strip steel is sleeved.
The two kinds of strip steel with abnormal threading conditions have the direct condition that the strip steel can not bite into the roll gap of the pinch roll due to no bite angle blockage when entering the pinch roll, so that the scrap steel is generated.
In the prior art, corresponding detection technology is not provided for the abnormal threading condition of turning up the head of the strip steel and impacting the guide plate to sleeve the strip steel head, and waste recovery technology for automatically taking measures after detecting the abnormal threading condition is not provided.
In fact, in the prior art, an operator observes the threading condition of the strip head through a monitor to identify the corresponding condition, that is, when the abnormal threading condition that the strip head turns up and the strip head impacts the guide sleeve is found, the method of manually opening the side guide plate and the like is adopted to reduce the probability of scrap occurrence, but the operation mode has the following defects:
1. due to the abnormal conditions of the turning-up of the strip steel head and the striking of the strip steel head on the guide plate pulling sleeve, an operator needs to observe the abnormal conditions through a monitor. On one hand, due to human negligence, the occurrence of threading abnormity sometimes cannot be judged; on the other hand, due to the limitation of observation conditions, the abnormal threading condition can be found out sometimes very late, so that the waste-saving measures cannot be taken in time;
2. because the waste-saving measures need to be taken manually, when the reaction and the disposal method of operators are different after the abnormality occurs, the situation that the waste steel cannot be saved due to improper disposal occurs.
Due to the defects, the scrap steel caused by the turning-up of the head of the strip steel and the collision of the head of the strip steel with the guide plate lifting sleeve belongs to multiple production scrap steel accidents.
In addition, although the turning-up of the strip steel head and the striking of the strip steel head on the guide plate are common phenomena in a hot rolling production line, other hot continuous rolling production lines do not have a special detection technology and a waste recovery technology at present.
Disclosure of Invention
The invention aims to solve the technical problem of providing a method for preventing the steel scrap of a recoiling machine aiming at the steel scrap recoiling caused by the turning-up of a head and the collision of the head with a guide plate lifting sleeve.
The technical problem to be solved can be implemented by the following technical scheme.
A method for preventing coiler scrap steel at least comprises a No. 1 coiler and a No. 2 coiler, wherein in the coiling process of a steel strip, when the No. 1 coiler is preselected, the steel strip sequentially enters a coiling position through a No. 1 side guide plate and a No. 1 pinch roll; when the No. 2 recoiling machine is preselected, the steel strip enters a coiling position through the No. 1 side guide plate, the No. 1 pinch roll, the No. 2 side guide plate and the No. 2 pinch roll in sequence; the method comprises the following operation steps:
1) f1 frame of the finishing mill group bites steel;
2) the finish rolling basic automation computer uploads an F1 steel biting signal to an upper computer;
3) the upper computer sends the target thickness and the target width of the strip steel to a coiling basic automation computer;
4) setting the initial opening of each side guide plate and the initial roll gap of each pinch roll by a coiling basic automation computer according to the target thickness and the target width of the strip steel;
5) detecting the turning-up condition of the head of the strip steel in the conveying area of the internal cooling roller table;
6) and 5) preselecting a No. 1 coiling machine when the head of the strip steel is turned over according to the detection result of the step 5), and the following steps are carried out:
a1) opening the opening of the No. 1 side guide plate to 50-200 mm;
a2) opening the roll gap of the No. 1 pinch roll to 1-2 times of the target thickness of the strip steel;
a3) no. 1 pinch roll bites steel;
a4) resetting the opening degree of the No. 1 side guide plate;
a5) and No. 1 pinch roll pressure control;
a6) and ending;
or, when the detection result of the step 5) is that the head of the strip steel is turned over, pre-selecting a No. 2 coiling machine, and performing the following steps:
b1) opening the opening of the No. 1 side guide plate to 50-200 mm;
b2) opening the opening of the No. 2 side guide plate to 50-200 mm;
b3) opening the roll gap of the No. 2 pinch roll to 1-2 times of the target thickness of the strip steel;
b4) no. 2 pinch roll bites steel;
b5) resetting the opening degree of the No. 1 side guide plate;
b6) resetting the opening degree of the No. 2 side guide plate;
b7) and No. 2 pinch roll pressure control;
b8) and ending;
7) detecting the sleeve lifting condition of the head of the strip steel when the head of the strip steel is not turned over as a detection result of the step 5);
8) and 7), when the detection result of the step 7) is that the head of the strip steel is sleeved, pre-selecting a No. 2 coiling machine, and performing the following steps:
c1) opening the opening of the No. 2 side guide plate to 50-200 mm;
c2) opening the roll gap of the No. 2 pinch roll to 1-2 times of the target thickness of the strip steel;
c3) no. 2 pinch roll bites steel;
c4) resetting the opening degree of the No. 2 side guide plate;
c5) and No. 2 pinch roll pressure control;
c6) and ending;
or, when the detection result of the step 7) is that the head of the strip steel cannot be jacked, preselecting a No. 2 coiling machine, and performing the following steps:
d1) no. 2 pinch roll bites steel;
d2) and No. 2 pinch roll pressure control;
d3) and ending.
As a further improvement of the technical scheme, the corresponding guide plate hydraulic cylinders are controlled by a first side guide plate hydraulic servo system and a second side guide plate hydraulic servo system respectively so as to adjust the opening degrees of the No. 1 side guide plate and the No. 2 side guide plate arranged at different stations to corresponding set values; and the first pinch roll hydraulic servo system and the second pinch roll hydraulic servo system respectively control corresponding hydraulic cylinders to adjust the roll gaps of the No. 1 pinch roll and the No. 2 pinch roll to corresponding set values.
As a further improvement of the technical scheme, in the step 5), the turning-up condition of the head of the strip steel is detected by a laser detection device.
As a further improvement of the technical scheme, the laser detection device is arranged on two sides of the roller way of the inner cold roller, and the laser transmission path is parallel to the roller way during detection and is higher than the roller surface by 250-400 mm.
As a further improvement of the technical scheme, the distance between the laser detection device and the No. 1 pinch roll is 10-50 m.
As a further improvement of the technical scheme, a threading abnormity detection device is adopted to detect the sleeve lifting condition of the head of the strip steel; the threading abnormity detection device is provided with a swinging piece which is suspended on the roller way between the pinch roll No. 1 and the side guide strip No. 2 and can swing back and forth along the running direction and the reverse direction of the strip steel after being touched by the strip steel, the swinging piece is provided with a probe head, a telescopic spring which can enable the probe head to elastically extend forwards or contract along the direction of a needle rod of the probe head, and a position sensing device which can identify the swinging amplitude of the swinging piece or the telescopic change of the probe head and transmit the identified information to a related control system.
As one of the preferred embodiments of the present invention, the swinging member is mounted on a frame body, and the swinging shaft of the swinging member is parallel to the roller way.
Also as a preferred embodiment of the present invention, the position sensing device is a proximity switch.
The invention aims to solve another technical problem of providing a device for preventing the steel scrap of a coiling machine.
The technical scheme is as follows.
A device for preventing coiler scrap steel at least comprises a No. 1 coiler and a No. 2 coiler, wherein in the coiling process of a steel strip, when the No. 1 coiler is preselected, the steel strip sequentially enters a coiling position through a No. 1 side guide plate and a No. 1 pinch roll; when the No. 2 recoiling machine is preselected, the steel strip enters a coiling position through the No. 1 side guide plate, the No. 1 pinch roll, the No. 2 side guide plate and the No. 2 pinch roll in sequence; the device is characterized in that a first detection device for detecting the turning-up of the head of the strip steel is arranged in a conveying area of an inner cold roll table, and a second detection device for detecting the turning-up of the head of the strip steel is arranged between the No. 1 pinch roll and the No. 2 side guide plate.
As a further improvement of the technical scheme, the first detection device is a laser detection device which is arranged at two sides of the roller way of the inner cold roller, and a laser transmission path is parallel to the roller way during detection and is higher than the roller surface by 250-400 mm; the distance between the laser detection device and the No. 1 pinch roll is 10-50 m.
As a further improvement of the technical solution, the second detecting device at least includes a swinging member, the swinging member is suspended above the roller way between the pinch roll 1 and the side guide roll 2, and can swing back and forth along the strip steel advancing direction and the reverse direction after being touched by the strip steel, the swinging member has a probe head, a telescopic spring which can enable the probe head to elastically extend or contract along the needle rod direction of the probe head, and a position sensing device which can identify the swinging amplitude of the swinging member and/or the telescopic change of the probe head and transmit the identified information to the relevant control system.
As a further improvement of the technical scheme, the swinging piece is arranged on a frame body, and a swinging shaft of the swinging piece is parallel to the roller way; the position sensing device is a proximity switch.
The method and the device for preventing the coiler steel scrap provided by the invention mainly have the following advantages:
1. the automatic detection and the automatic waste recovery of the turning-up of the strip steel head and the collision of the strip steel head with the guide plate are realized, and the steel scrap accidents of the coiling machine caused by the turning-up of the strip steel head and the collision of the strip steel head with the guide plate are effectively reduced.
2. The condition of scrap steel caused by improper disposal due to the skill difference of personnel is reduced.
Drawings
FIG. 1 is a schematic diagram of the main equipment structure of a coiler; wherein FIG. 1a is a front view; FIG. 1b is a partial schematic top view of FIG. 1 a;
FIG. 2 is a schematic drawing of a strip head striking guide sleeve, wherein FIG. 2a is a front view; FIG. 2b is a partial schematic top view of FIG. 2 a;
FIG. 3 is a schematic view showing the positions of the laser detection device and the threading anomaly detection device;
FIG. 4 is a schematic diagram of a threading anomaly detection device in position and in top view;
FIG. 5 is a side view of the threading anomaly detection device;
FIG. 6 is a schematic view of the swing position of the probe of the threading anomaly detection device in FIG. 5;
FIG. 7 is a schematic structural view of a probe tube of the threading anomaly detection device in FIG. 5;
FIG. 8 is a schematic view of a variation of the spring of FIG. 7;
FIG. 9 is a block diagram of the apparatus of the present invention;
FIG. 10 is a logic control diagram of the present invention;
Detailed Description
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
The method and the device for preventing the coiler steel scrap are mainly divided into two parts, wherein the first part is a threading abnormity detection device which is used for detecting the threading abnormity conditions of the turning-up of the head of the strip steel and the collision of the head of the strip steel with a guide plate sleeve. The second part is an automatic waste-removing technology, and measures of automatically opening the side guide plates and lifting the pinch roll gaps are adopted to remove waste when abnormal threading is detected.
By adding the head abnormity detection device, when the abnormal conditions of strip steel head turning or sleeve stacking and the like are detected, the roll gap of the pinch roll and the side guide plate are automatically opened, so that the probability of the strip steel head biting into the pinch roll is increased, and the steel scrap accidents are reduced.
The method comprises the following specific steps:
1. threading abnormality detection device
When the strip steel is normally threaded, the strip steel generally runs in a manner of being tightly attached to a roller way, and once the strip steel head turns up and collides with a guide plate to be sleeved to be threaded, the turning-up and sleeving parts of the strip steel are obviously higher than the surface of the roller way, and the abnormal threading condition can be judged by only adding a device for detecting the height of the strip steel head.
The threading abnormality detecting device shown in fig. 2 to 3 is composed of a laser detecting device 6 and a threading abnormality detecting device 7. Because the partial roller way in front of the No. 1 side guide plate 2 adopts an internal cooling roller, the environment is good, and a laser detection device can be adopted, so that the laser detection device 6 is arranged at the corresponding position. Referring to fig. 3, the laser detection device 6 is installed at both sides of the roller table, and is mainly used for detecting the turning-up of the head of the strip steel. When the laser is interrupted, the head of the strip steel can be judged to be turned up. The height from the roller surface depends on the height of the turned-up strip steel, and the value range is 250mm-400 mm. The distance from the pinch roll depends on the lifting speed of the pinch roll gap and the opening speed of the side guide plate, and the value range is 10-50 m.
At the entrance of the side guide 4 No. 2, there is cooling water and severe mist, which may interfere with the parts of the apparatus like the laser detector, and therefore, there is provided an undisturbed threading abnormality detector 7. Referring to fig. 3, the strip threading abnormality detecting device 7 is installed behind the pinch roll 3 No. 1 and spans over the roller way. The device is mainly used for finding the abnormal threading condition of the strip steel head part impacting the guide plate sleeve.
Referring to fig. 4 to 8, the threading anomaly detection device 7 is composed of a beam 71, a bracket 72, a base 73, a probe 74, a probe bracket 75, a spring 76, a probe 77, a proximity switch 78, a proximity switch bracket 79, and the like. The beam 71 is supported and fixed across the roller way through a base 73 and a bracket 72, and is specifically positioned between the No. 1 pinch roll 3 and the No. 2 side guide plate 4. An avoiding groove 711 is arranged in the middle of the cross beam 71, a probe 74 fixed through a probe bracket 75 and a shaft 751 is suspended above the roller way and can rotate along the shaft 751 to swing back and forth in a space defined by the avoiding groove 711, and as shown in fig. 6, the positions of a plurality of limit swing positions are illustrated. The shaft 751 is parallel to the rollers of the roller table. A probe 77 is arranged in the probe tube 74, and the probe 77 can move up and down in the vertical direction and the like through the compression change of a spring 75 wrapped outside the probe 77; as shown in fig. 7 and 8, different variation positions are illustrated.
Wherein the probe tube 74 can rotate (swing) back and forth along the shaft 751 on the probe tube bracket to prevent the strip steel from being damaged during the advancing process or the steel pouring process. When the probe tube is rotated back and forth to a certain angle, the end of the probe 77 will move away from the proximity switch 78. In addition, the probe 77 can also move up and down in the probe under the action of the spring 75, which is also designed to prevent the strip steel from damaging the probe 77. The end of the probe 77 will also exit the proximity switch 78 as the probe is jacked up by the strip steel in front and back. As soon as the tip of the needle 77 leaves the proximity switch 78, it is possible to judge the threading abnormality. The proximity switch 78 is fixed via a proximity switch bracket 79 and can sense the change of the up-down displacement or the back-and-forth swing of the probe. The change information of the position induction is transmitted to a related control system, and then subsequent control operation is carried out according to the acquisition of the information.
2. Automatic waste recovery technology
According to a plurality of experiments, when the head of the strip steel turns over or impacts the guide plate lifting sleeve, the probability of scrap steel can be greatly reduced by opening the side guide plate and lifting the pinch roll gap. Therefore, when the strip steel head turning-up or the strip steel head striking the guide plate to turn up the sleeve is detected by the strip threading abnormity detection device 7, the rolling basic automation computer automatically opens the side guide plate and lifts up the pinch roll gap to achieve the purpose of waste recovery.
3. Control flow
Referring to fig. 9 and 10, the method and apparatus for preventing scrap in a coiler according to the present invention have the following control flow:
(1) and starting;
(2) the head of the strip steel is bitten into an F1 frame 91 of a finishing mill group;
(3) the finish rolling basic automation computer 92 uploads an F1 steel biting signal to an upper computer 93;
(4) the upper computer 93 issues the target thickness and the target width of the strip steel to the coiling basic automation computer 8 (such as PLC);
(5) the coiling basic automation computer 8 controls the No. 1 and No. 2 guide plate hydraulic cylinders 21 and 41 through the No. 1 and No. 2 guide plate hydraulic servo systems 22 and 42 according to the target width of the strip steel to set the opening degrees of the No. 1 and No. 2 guide plates to correct positions; and the No. 1 and No. 2 pinch roll hydraulic cylinders 31 and 51 are controlled by the No. 1 and No. 2 pinch roll hydraulic servo systems 32 and 52 to set the No. 1 and No. 2 pinch roll gaps to correct positions according to the target thickness of the strip steel.
(6) And when the laser detection device 6 finds that the head of the strip steel is turned over, judging whether the head of the strip steel is preselected by the No. 1 recoiling machine. If the number 1 is pre-selected by the coiling machine, the coiling basic automation computer 8 controls the number 1 guide plate hydraulic cylinder 21 to open the opening B of the number 1 guide plate through the number 1 guide plate hydraulic servo system 22; and the No. 1 pinch roll hydraulic servo system 32 controls the No. 1 pinch roll hydraulic cylinder 31 to open the roll gap G of the No. 1 pinch roll.
(7) When the pinch roll No. 1 bites steel, the reeling base automation computer 8 controls the guide plate hydraulic cylinder 21 No. 1 through the guide plate hydraulic servo system 22 No. 1 to close the opening of the guide plate No. 1 (namely, the opening of the guide plate is reset, and the following steps are similar); and the No. 1 pinch roll hydraulic servo system 32 controls the No. 1 pinch roll hydraulic cylinder 31 to control the input pressure of the No. 1 pinch roll.
(8) And when the laser detection device finds that the head of the strip steel is turned over, judging whether the head of the strip steel is preselected by the No. 2 recoiling machine. If the number 2 is pre-selected by the coiling machine, the coiling basic automation computer 8 controls the number 1 guide plate hydraulic cylinder 21 to open the opening B of the number 1 guide plate through the number 1 guide plate hydraulic servo system 22; the No. 2 guide plate hydraulic servo system 42 controls the No. 2 guide plate hydraulic cylinder 41 to open the opening degree B of the No. 2 guide plate; and the No. 2 pinch roll hydraulic servo system 52 controls the No. 2 pinch roll hydraulic cylinder 51 to open the roll gap G of the No. 2 pinch roll.
(9) When the No. 2 pinch roll bites steel, the reeling basic automation computer 8 controls the No. 1 guide plate hydraulic cylinder 21 through the No. 1 side guide plate hydraulic servo system 22 to close the opening degree B of the No. 1 side guide plate; the No. 2 guide plate hydraulic servo system 42 controls the No. 2 guide plate hydraulic cylinder 41 to close the opening degree B of the No. 2 guide plate; and the No. 2 pinch roll hydraulic servo system 52 controls the No. 2 pinch roll hydraulic cylinder 51 to control the input pressure of the No. 2 pinch roll.
(10) If the laser detection device 6 does not find that the head of the strip steel is turned up, but the strip threading abnormality detection device 7 detects that the head of the strip steel is turned up, the coiling base automation computer 8 controls the No. 2 guide plate hydraulic cylinder 41 to open the opening degree B of the No. 2 guide plate through the No. 2 guide plate hydraulic servo system 42; and the No. 2 pinch roll hydraulic servo system 52 controls the No. 2 pinch roll hydraulic cylinder 51 to open the roll gap G of the No. 2 pinch roll.
(11) When the No. 2 pinch roll bites steel, the coiling basic automation computer 8 controls the No. 2 guide plate hydraulic cylinder 41 through the No. 2 side guide plate hydraulic servo system 42 to close the opening degree B of the No. 2 side guide plate; and the No. 2 pinch roll hydraulic servo system 52 controls the No. 2 pinch roll hydraulic cylinder 51 to control the input pressure of the No. 2 pinch roll.
(12) The laser detection device 6 does not find that the head of the strip steel is turned over, the strip threading abnormality detection device 7 does not detect that the head of the strip steel is turned over, and when the pinch roll No. 2 bites steel, the coiling basic automation computer 8 controls the pinch roll No. 2 hydraulic cylinder 51 to control the pressure of the pinch roll No. 2 through the pinch roll No. 2 hydraulic servo system 52.
(13) And (6) ending.
Wherein, the value range of B in the above expression is 50-200 mm; the value range of G is 1h-2h, and h is the target thickness of the strip steel.
In addition, the method and the device for preventing the steel scrap of the coiler, which are provided by the invention, are experimentally implemented on the coiler of a production line of a certain hot rolling mill 2050. The specific laser detection device selects a laser head transmitter (signal processing unit) HOKUYO photoelectric sensor FHM-311-2 and a laser head receiver (signal processing unit) HOKUYO photoelectric sensor FHM-201-14K. After 5 months of the test, the accidents of head lamination and head scrap steel do not occur. The related technical data are as follows:
the height L1 from the roller surface is 300 mm;
the distance L2 from the pinch roll is 25 m;
the opening amount B of the side guide plate is 100 mm;
and h represents the roll gap lifting amount G of the pinch roll.
Claims (6)
1. A method for preventing coiler scrap steel at least comprises a No. 1 coiler and a No. 2 coiler, wherein in the coiling process of a steel strip, when the No. 1 coiler is preselected, the steel strip sequentially enters a coiling position through a No. 1 side guide plate and a No. 1 pinch roll; when the No. 2 recoiling machine is preselected, the steel strip enters a coiling position through the No. 1 side guide plate, the No. 1 pinch roll, the No. 2 side guide plate and the No. 2 pinch roll in sequence; the method is characterized by comprising the following operation steps:
1) f1 frame of the finishing mill group bites steel;
2) the finish rolling basic automation computer uploads an F1 steel biting signal to an upper computer;
3) the upper computer sends the target thickness and the target width of the strip steel to a coiling basic automation computer;
4) setting the initial opening of each side guide plate and the initial roll gap of each pinch roll by a coiling basic automation computer according to the target thickness and the target width of the strip steel;
5) detecting the turning-up condition of the head of the strip steel in the conveying area of the roller way of the inner cold roller by a laser detection device; the laser detection device is arranged at two sides of the roller way of the inner cold roller, and a laser transmission path is parallel to the roller way during detection and is 400mm higher than the roller surface by 250-; the distance between the laser detection device and the No. 1 pinch roll is 10-50 m;
6) and 5) preselecting a No. 1 coiling machine when the head of the strip steel is turned over according to the detection result of the step 5), and the following steps are carried out:
a1) opening the opening of the No. 1 side guide plate to 50-200 mm;
a2) opening the roll gap of the No. 1 pinch roll to 1-2 times of the target thickness of the strip steel;
a3) no. 1 pinch roll bites steel;
a4) resetting the opening degree of the No. 1 side guide plate;
a5) and No. 1 pinch roll pressure control;
a6) and ending;
or, when the detection result of the step 5) is that the head of the strip steel is turned over, pre-selecting a No. 2 coiling machine, and performing the following steps:
b1) opening the opening of the No. 1 side guide plate to 50-200 mm;
b2) opening the opening of the No. 2 side guide plate to 50-200 mm;
b3) opening the roll gap of the No. 2 pinch roll to 1-2 times of the target thickness of the strip steel;
b4) no. 2 pinch roll bites steel;
b5) resetting the opening degree of the No. 1 side guide plate;
b6) resetting the opening degree of the No. 2 side guide plate;
b7) and No. 2 pinch roll pressure control;
b8) and ending;
7) detecting the sleeve lifting condition of the head of the strip steel when the head of the strip steel is not turned over as a detection result of the step 5);
wherein, a threading abnormity detection device is adopted to detect the sleeve opening condition of the head of the strip steel; the threading abnormity detection device is provided with a swinging piece which is suspended on a roller way between the pinch roll No. 1 and the side guide strip No. 2 and can swing back and forth along the running direction and the reverse direction of the strip steel after being touched by the strip steel, the swinging piece is provided with a probe head, a telescopic spring which can enable the probe head to elastically extend forwards or contract along the direction of a needle rod of the probe head, and a position sensing device which can identify the swinging amplitude of the swinging piece or the telescopic change of the probe head and transmit the identified information to a related control system;
8) and 7), when the detection result of the step 7) is that the head of the strip steel is sleeved, pre-selecting a No. 2 coiling machine, and performing the following steps:
c1) opening the opening of the No. 2 side guide plate to 50-200 mm;
c2) opening the roll gap of the No. 2 pinch roll to 1-2 times of the target thickness of the strip steel;
c3) no. 2 pinch roll bites steel;
c4) resetting the opening degree of the No. 2 side guide plate;
c5) and No. 2 pinch roll pressure control;
c6) and ending;
or, when the detection result of the step 7) is that the head of the strip steel cannot be jacked, preselecting a No. 2 coiling machine, and performing the following steps:
d1) no. 2 pinch roll bites steel;
d2) and No. 2 pinch roll pressure control;
d3) and ending.
2. The method for preventing coiler scrap according to claim 1, characterized in that the corresponding guide hydraulic cylinders are controlled by the first side guide hydraulic servo system and the second side guide hydraulic servo system, respectively, to adjust the opening degrees of the No. 1 side guide and the No. 2 side guide disposed at different stations to the corresponding set values; and the first pinch roll hydraulic servo system and the second pinch roll hydraulic servo system respectively control corresponding hydraulic cylinders to adjust the roll gaps of the No. 1 pinch roll and the No. 2 pinch roll to corresponding set values.
3. Method for preventing coiler scraps according to claim 1, characterised in that said oscillating elements are placed on a frame, the axis of oscillation of said oscillating elements being parallel to said roller table.
4. The method of preventing coiler scrap according to claim 1 wherein said position sensing device is a proximity switch.
5. A device for preventing coiler scrap steel at least comprises a No. 1 coiler and a No. 2 coiler, wherein in the coiling process of a steel strip, when the No. 1 coiler is preselected, the steel strip sequentially enters a coiling position through a No. 1 side guide plate and a No. 1 pinch roll; when the No. 2 recoiling machine is preselected, the steel strip enters a coiling position through the No. 1 side guide plate, the No. 1 pinch roll, the No. 2 side guide plate and the No. 2 pinch roll in sequence; the device is characterized in that a first detection device for detecting the turning-up of the head of the strip steel is arranged in the conveying area of the roller table of the inner cold roll, and a second detection device for detecting the turning-up of the head of the strip steel is arranged between the pinch roll No. 1 and the side guide plate No. 2;
the first detection device is a laser detection device which is arranged at two sides of the roller way of the inner cold roller, and a laser transmission path is parallel to the roller way during detection and is higher than the roller surface by 250-400 mm; the distance between the laser detection device and the No. 1 pinch roll is 10-50 m;
the second detection device at least comprises a swinging piece, the swinging piece is suspended on a roller way between the pinch roll No. 1 and the side guide strip No. 2, and can swing back and forth along the running direction and the reverse direction of the strip steel after being touched by the strip steel, the swinging piece is provided with a probe head, a telescopic spring which can enable the probe head to elastically extend forwards or contract along the direction of a needle rod of the probe head, and a position sensing device which can identify the swinging amplitude of the swinging piece or the telescopic change of the probe head and transmit the identified information to a related control system.
6. The apparatus for preventing coiler scrap according to claim 5, characterized in that said oscillating member is placed on a frame, the oscillating axis of said oscillating member being parallel to said roller table; the position sensing device is a proximity switch.
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| CN111389935A (en) * | 2020-03-12 | 2020-07-10 | 南京钢铁股份有限公司 | Control method for roller table swinging between medium plate mills |
| CN111330974B (en) * | 2020-03-13 | 2021-11-30 | 江苏沙钢集团有限公司 | Hot continuous rolling production method for thick X70 pipeline steel coil |
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