CN113751504B - Tail-running preventing mechanism of pickling line - Google Patents
Tail-running preventing mechanism of pickling line Download PDFInfo
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- CN113751504B CN113751504B CN202111068884.0A CN202111068884A CN113751504B CN 113751504 B CN113751504 B CN 113751504B CN 202111068884 A CN202111068884 A CN 202111068884A CN 113751504 B CN113751504 B CN 113751504B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B15/00—Arrangements for performing additional metal-working operations specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B15/0085—Joining ends of material to continuous strip, bar or sheet
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B45/00—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B45/02—Devices for surface or other treatment of work, specially combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills for lubricating, cooling, or cleaning
- B21B45/0269—Cleaning
- B21B45/0275—Cleaning devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/20—Bonding
- B23K26/21—Bonding by welding
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23G—CLEANING OR DE-GREASING OF METALLIC MATERIAL BY CHEMICAL METHODS OTHER THAN ELECTROLYSIS
- C23G3/00—Apparatus for cleaning or pickling metallic material
- C23G3/02—Apparatus for cleaning or pickling metallic material for cleaning wires, strips, filaments continuously
- C23G3/027—Associated apparatus, e.g. for pretreating or after-treating
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
The invention provides a tail-running preventing mechanism of an acid washing machine set, which comprises: the device comprises a welding part, a first conveying part, an acid washing process section, a second conveying part and a rolling mill, wherein one side, connected with the welding part, of the first conveying part is provided with a detection clamping device, the first conveying part is used for conveying the last coiled steel to the acid washing process section for acid washing, the second conveying part is used for conveying the last coiled steel subjected to acid washing to the rolling mill for cold rolling, the welding part is used for welding the coiled head of the next coiled steel with the coiled tail of the last coiled steel, and the detection clamping device is used for detecting whether the tail of the last coiled steel is separated or not and clamping the tail of the strip steel when the tail is separated. The invention can prevent the tail of the strip steel from separating from the No. 1 driving roller and entering the inlet loop.
Description
Technical Field
The invention relates to the technical field of cold-rolled strip steel pickling, in particular to a tail-running preventing mechanism of a pickling line.
Background
In order to ensure continuous operation of the strip steel in the process section, a special laser welder is used for rapidly welding front and rear strip steel, but during welding, when the tail part of the strip steel is operated to move, the tail part of the last strip steel is separated from a No. 1 driving roller and enters an inlet loop section. This accident is called a run-out, and the operator needs to pull the tail of the strip back to the welder to re-weld and re-coil the hoisting rope, which takes more than 4 hours. Therefore, it is necessary to design an acid washing unit tail-out preventing mechanism for preventing the tail of the strip steel from being separated from the No. 1 driving roller and entering the inlet loop.
Disclosure of Invention
According to the proposed technical problem that the processing time is more than 4 hours when the tail part of the strip steel is operated to move, the tail part of the last strip steel is separated from the No. 1 driving roller and enters the inlet loop section, an operator needs to pull the tail part of the strip steel back to the welding machine to weld again and coil the winding steel rope again, and the pickling unit tail-preventing mechanism is provided. The invention reduces the tension of the inlet loop mainly during welding, thereby reducing the speed and probability of separating the tail of the strip steel and providing time assurance for clamping the tail of the strip steel by the clamping plate; the photoelectric sensor is arranged behind the welding machine for detection, and a method for cutting off loop tension and clamping double protection by the clamping plate is adopted, so that reliable assurance is provided for preventing the tail of the strip steel from separating, and the tail of the strip steel is prevented from separating from the No. 1 driving roller to enter the inlet loop.
The invention adopts the following technical means:
an acid wash unit prevents running tail mechanism, includes: the device comprises a welding part, a first conveying part, a pickling process section, a second conveying part and a rolling mill, wherein a detection clamping device is arranged on one side, connected with the welding part, of the first conveying part, the first conveying part is used for conveying the last coiled steel to the pickling process section for pickling, the second conveying part is used for conveying the pickled last coiled steel to the rolling mill for cold rolling, the welding part is used for welding the coiling head of the next coiled steel with the coiling tail of the last coiled steel, and the detection clamping device is used for detecting whether the tail of the last coiled steel is separated or not and clamping the tail of the coiled steel when the tail is separated.
Further, the first conveying part consists of an inlet section, a No. 1 driving roller, an inlet loop and a No. 2 driving roller which are sequentially connected with each other from left to right, one side of the inlet section is close to the welding part and is used for fixing the tail part of the last coil of strip steel, a loop car and a loop hoisting mechanism are arranged in the inlet loop, the loop hoisting mechanism stores the strip steel for the inlet loop, the loop hoisting mechanism releases ropes in the time of rapid welding of the strip steel before and after the welding part, and the inlet loop releases strip steel storage in the inlet loop for the pickling process section through the No. 2 driving roller and runs in the emptying direction; after the welding part is welded, the inlet section fills strip steel into the inlet loop at a high speed which is more than 2 times that of the pickling process section, the loop vehicle runs in the full-filling direction, and the loop hoisting mechanism is used for storing the strip steel allowance for the next welding;
the pickling process section comprises a pickling part, a rinsing part dryer and the like, wherein the pickling part consists of a plurality of pickling tanks and is used for pickling the strip steel in sequence; the rinsing part consists of a plurality of rinsing tanks and sequentially rinses the strip steel after pickling; the dryer dries the rinsed strip steel;
the second conveying part comprises a 3# driving roller, an outlet loop and a loop trolley which are connected with each other, wherein the 3# driving roller conveys the dried strip steel to a rolling mill for cold rolling through the loop trolley and the outlet loop;
the welding part is a special laser welding machine, and one side of the welding part, which is far away from the inlet section, is provided with an uncoiler for providing the next coil of strip steel.
Further, the detection clamping device consists of a computer, and a photoelectric sensor and a clamping device which are electrically connected with the computer, wherein the photoelectric sensor is arranged at a position, close to a welding part, on an inlet section and is marked as a point A and used for detecting whether tail separation occurs in the last coiled strip steel; the clamping device is arranged at the position, close to the No. 1 driving roller, on the inlet section and is used for clamping the tail part of the strip steel when the tail part of the last strip steel breaks away, so that the tail part of the last strip steel is prevented from breaking away from the No. 1 driving roller and entering an inlet loop section; the loop winding mechanism is electrically connected with the motor.
Further, the distance between the photoelectric sensor and the No. 1 driving roller is 5m.
Further, the clamping device is a pneumatic clamping device and consists of an upper clamping plate, a lower clamping plate, an air cylinder and an electromagnetic valve, wherein the upper clamping plate and the lower clamping plate are respectively connected with the air cylinder and are respectively arranged above and below the strip steel, the air cylinder is connected with the electromagnetic valve, and the electromagnetic valve is electrically connected with the computer;
the computer controls the inlet loopers to reduce tension during welding according to strip steel data, when the photoelectric sensor detects that the tail of the strip steel breaks away from the point A, the computer gives out a power-off instruction of the looper winding mechanism and a clamping instruction of the two clamping plates, the looper winding mechanism stops tensioning the strip steel, the electromagnetic valves corresponding to the two clamping plates are powered on, the air cylinders extend out, the clamping devices clamp the tail of the strip steel, the upper clamping plates are in compression connection with the upper surface of the strip steel, and the lower clamping plates are in compression connection with the lower surface of the strip steel; the further the two clamping plates are from point a, the more time is won for the clamping action of the clamping plates.
Further, the inner surfaces of the upper clamping plate and the lower clamping plate, which are in contact with the strip steel, are respectively provided with a lining rubber layer, so that the friction force between the upper clamping plate and the strip steel is increased; when the clamping device is in an initial state, namely the strip steel is not clamped, the distance between the surfaces of the upper rubber layer and the lower rubber layer and the strip steel is 5mm.
Further, the clamping process after the tail part of the strip steel is separated: after the tail part of the strip steel leaves the uncoiler, welding operation is performed, meanwhile, the 1# driving roller is in inching, then the 1# driving roller is in inching stop, when the band-type brake is not tight, the tail part of the strip steel leaves the point A, the photoelectric sensor detects that the tail part of the strip steel is separated, at the moment, the motor of the loop winding mechanism is controlled to be powered off through a computer, and the loop winding mechanism is tensioned and cut off; then, controlling the two clamping plates to act, and clamping the tail part of the strip steel to stop at a position 1.5m away from the 1# driving roller;
the processing procedure after clamping: the two clamping plates continue to clamp the tail part of the strip steel, then, the motor band-type brake of the No. 1 driving roller is inspected and processed, the two clamping plates are loosened by the operating button, meanwhile, the power supply of the loop winding mechanism is restored, the tension of the inlet loop is restored, the No. 1 driving roller is clicked, the tail part of the strip steel is enabled to advance to a welding position, the strip steel before and after the strip steel can be welded, and the normal production running state is restored.
Further, the strip steel tension is established by the rotation speed difference of the 1# driving roller and the loop winding mechanism when the strip steel at the inlet section runs, the front and rear strip steels are connected during the period, and the problem of strip steel tail separation does not exist; controlling the tension of the strip steel according to normal parameters;
during welding, the tension of the inlet loop is established by the loop winding mechanism and the motor band-type brake of the No. 1 driving roller, the running speed of the loop vehicle is relatively low, the tension of the strip steel of the inlet loop is reduced during the period, and the strip steel is controlled according to 76% of normal parameters, so that the speed and probability of the tail part of the strip steel separating from the No. 1 driving roller are reduced.
Further, the unit tension of the inlet looper when the strip steel at the inlet section runs is 0.59KG/mm 2 The method comprises the steps of carrying out a first treatment on the surface of the The unit tension of the inlet looper during the welding of the strip steel at the inlet section is 0.45KG/mm 2 The method comprises the steps of carrying out a first treatment on the surface of the The thickness of the steel strip in the inlet looper is 3.0mm, and the width is 1525mm.
Further, the strip tension of the inlet loop when the inlet section strip operates=0.59 KG/mm 2 X 1525mm x 3.0mm = 2.7 tons;
strip tension=0.45 KG/mm of inlet loop during welding of inlet section strip 2 X 1525mm x 3.0mm = 2.06 tons;
i.e. the tension of the inlet loop is converted into:
when the band steel at the inlet section runs, the tension of the band steel at the inlet loop is 2.7 tons;
when the tail part of the strip steel leaves the uncoiler, the tension of the inlet loop is reduced to 2.06 tons;
when the front and rear strip steel are welded, the inlet section starts to operate, and the tension of the inlet loop is restored to 2.7 tons.
Compared with the prior art, the invention has the following advantages:
1. the tail-running preventing mechanism of the pickling line reduces the tension of the inlet loop during welding, thereby reducing the speed and probability of separating the tail of the strip steel and providing time assurance for clamping the tail of the strip steel by the clamping plate.
2. The tail-running preventing mechanism of the pickling line provided by the invention is characterized in that the photoelectric sensor is arranged behind the welding machine for detection, and a double protection method of cutting off loop tension and clamping by the clamping plate is adopted, so that reliable assurance is provided for preventing the tail of the strip steel from separating.
In summary, the technical scheme of the invention can solve the problems that in the prior art, when the tail part of the strip steel is operated to click, the tail part of the last strip steel is separated from the No. 1 driving roller and enters an entrance loop section, an operator needs to pull the tail part of the strip steel back to a welding machine to be welded again and coil a winding steel rope again, and the processing time is more than 4 hours.
Based on the reasons, the method can be widely popularized in the fields of preventing the tail of the strip steel from separating in the pickling line and the like.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
Fig. 1 is a schematic structural view of the present invention.
Fig. 2 is a schematic structural view of the upper clamping plate according to the present invention, wherein (a) is a side view and (b) is a front view.
Fig. 3 is a schematic view of the structure of the lower clamping plate according to the present invention, wherein (a) is a side view and (b) is a front view.
In the figure: 01. the rolling head of the next strip steel roll; 02. the tail of the upper strip steel roll; 1. an uncoiler; 2. a laser welder; 3. a computer; 4. a photoelectric sensor; 5. a clamping device; 6. an electromagnetic valve; 7. a 1# driving roller; 8. an inlet loop; 9. a loop vehicle; 10. a loop hoisting mechanism; 11. a 2# driving roller; 12. A pickling tank; 13. a rinse tank; 14. a dryer; 15. 3# driving roller; 16. an outlet loop; 17. A loop trolley; 18. and (5) rolling mill.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
As shown in fig. 1 to 3, the present invention provides a tail-out preventing mechanism for an acid washing machine, comprising: the device comprises a welding part, a first conveying part, a pickling process section, a second conveying part and a rolling mill 18, wherein a detection clamping device is arranged on one side, connected with the welding part, of the first conveying part, the first conveying part is used for conveying the last coiled steel to the pickling process section for pickling, the second conveying part is used for conveying the pickled last coiled steel to the rolling mill 18 for cold rolling, the welding part is used for welding a coil head 01 of the next coiled steel with a coil tail 02 of the last coiled steel, and the detection clamping device is used for detecting whether tail separation occurs on the last coiled steel and clamping the tail of the coiled steel when the tail is separated.
As a preferred embodiment, the first conveying part consists of an inlet section, a 1# driving roller 7, an inlet loop 8 and a 2# driving roller 11 which are sequentially connected from left to right, one side of the inlet section is close to a welding part and is used for fixing the tail part of the last coil of strip steel, a loop car 9 and a loop hoisting mechanism 10 are arranged in the inlet loop 8, the loop hoisting mechanism 10 stores the strip steel for the inlet loop 8, the loop hoisting mechanism 10 releases ropes in the time of rapid welding of the strip steel before and after the welding part, the inlet loop 8 releases the strip steel reserve in the inlet loop for the pickling process section through the 2# driving roller 11, and the loop car 9 runs towards the emptying direction; after the welding part is welded, the inlet section fills the strip steel into the inlet loop 8 at a high speed which is more than 2 times that of the pickling process section, the loop carriage 9 runs in the full-filling direction, and the loop hoisting mechanism 10 is used for storing the strip steel allowance for the next welding;
the pickling process section comprises a pickling part, a rinsing part dryer 14 and the like, wherein the pickling part consists of a plurality of pickling tanks 12 and is used for pickling strip steel in sequence; the rinsing part consists of a plurality of rinsing tanks 13 and sequentially rinses the strip steel after pickling; the dryer 14 dries the rinsed strip steel;
the second conveying part comprises a 3# driving roller 15, an outlet loop 16 and a loop trolley 17 which are connected with each other, wherein the 3# driving roller 15 conveys the dried strip steel to a rolling mill 18 for cold rolling through the loop trolley 17 and the outlet loop 16;
the welding part is a special laser welding machine 2, and one side of the welding part, which is far away from the inlet section, is provided with an uncoiler 1 for providing the next coil of strip steel.
As a preferred embodiment, the detecting and clamping device is composed of a computer 3, a photoelectric sensor 4 and a clamping device 5, wherein the photoelectric sensor 4 and the clamping device 5 are electrically connected with the computer 3, and the photoelectric sensor 4 is arranged at a position, close to a welding part, on an inlet section and is marked as a point A and used for detecting whether tail separation occurs in the last coiled steel; the clamping device 5 is arranged at the position, close to the No. 1 driving roller 7, on the inlet section and is used for clamping the tail part of the strip steel when the tail part of the last strip steel is separated, so that the tail part of the last strip steel is prevented from separating from the No. 1 driving roller 7 and entering the section of the inlet loop 8; the loop winding mechanism 10 is electrically connected with the computer 3.
As a preferred embodiment, the distance between the photosensor 4 and the 1# driving roller 7 is 5m.
As a preferred embodiment, the clamping device 5 is a pneumatic clamping device 5, and is composed of an upper clamping plate, a lower clamping plate, an air cylinder and an electromagnetic valve 6, wherein the upper clamping plate and the lower clamping plate are respectively connected with the air cylinder and are respectively arranged above and below the strip steel, the air cylinder is connected with the electromagnetic valve 6, and the electromagnetic valve 6 is electrically connected with the computer 3;
the computer 3 controls the inlet loop 8 to reduce tension during welding according to strip steel data, when the photoelectric sensor 4 detects that the tail part of the strip steel breaks away from the point A, the computer 3 gives a loop hoisting mechanism 10 power-off and two clamping plates clamp instructions, the loop hoisting mechanism 10 stops tensioning the strip steel, the electromagnetic valves 6 corresponding to the two clamping plates are powered on, the air cylinders extend out, the clamping devices 5 clamp the tail part of the strip steel, the upper clamping plates are in compression connection with the upper surface of the strip steel, and the lower clamping plates are in compression connection with the lower surface of the strip steel; the further the two clamping plates are from point a, the more time is won for the clamping action of the clamping plates. The width W of both clamping plates was 150mm, the length L was 200mm, and the thickness D of each clamping plate excluding the rubber layer was 30mm.
As a preferable implementation mode, the inner surfaces of the upper clamping plate and the lower clamping plate, which are in contact with the strip steel, are respectively provided with a lining rubber layer, so that the friction force between the upper clamping plate and the strip steel is increased; when the clamping device 5 is in an initial state, namely the strip steel is not clamped, the distance between the surfaces of the upper rubber layer and the lower rubber layer and the strip steel is 5mm.
As a preferred embodiment, the clamping process after the tail of the strip is separated: after the tail part of the strip steel leaves the uncoiler 1, welding operation is carried out, meanwhile, the 1# driving roller 7 is in point movement, then the 1# driving roller 7 is in point movement and stops, when the band-type brake is not tight, the tail part of the strip steel leaves the point A, the photoelectric sensor 4 (photoelectric detection switch) detects that the tail part of the strip steel is separated, at the moment, the motor of the loop winding mechanism 10 is controlled to be powered off through the computer 3, and the loop winding mechanism 10 is tensioned and cut off; then, controlling the two clamping plates to act, and clamping the tail part of the strip steel to stop at a position 71.5m away from the No. 1 driving roller;
the processing procedure after clamping: the two clamping plates continue to clamp the tail part of the strip steel, then, the motor band-type brake of the No. 1 driving roller 7 is checked and processed, the two clamping plates are loosened by the operation button, meanwhile, the power supply of the loop winding mechanism 10 is restored, the tension of the inlet loop 8 is restored, the No. 1 driving roller 7 is clicked, the tail part of the strip steel is enabled to advance to a welding position, the strip steel before and after the strip steel can be welded, and the normal production running state is restored.
As a preferable implementation mode, the strip steel tension when the strip steel at the inlet section runs is established by the rotation speed difference of the No. 1 driving roller 7 and the loop winding mechanism 10, and the strip steel is connected before and after the period, so that the problem of strip steel tail separation does not exist; controlling the tension of the strip steel according to normal parameters;
during welding, tension of the inlet loop 8 is established by the loop winding mechanism 10 and the motor band-type brake of the No. 1 driving roller 7, the running speed of the loop carriage 9 is relatively low, and during the period, the tension of the strip steel of the inlet loop 8 is reduced, and the strip steel is controlled according to 76% of normal parameters, so that the speed and probability of the tail part of the strip steel separating from the No. 1 driving roller 7 are reduced.
As a preferred embodiment, the unit tension of the inlet loopers 8 during the operation of the strip steel at the inlet section is 0.59KG/mm 2 The method comprises the steps of carrying out a first treatment on the surface of the The tension of the inlet looper 8 units during the welding of the strip steel at the inlet section is 0.45KG/mm 2 The method comprises the steps of carrying out a first treatment on the surface of the The thickness of the steel strip in the inlet looper 8 is 3.0mm and the width is 1525mm.
As a preferred embodiment, the strip tension of the inlet loop 8 during operation of the inlet section strip=0.59 KG/mm 2 X 1525mm x 3.0mm = 2.7 tons;
strip tension=0.45 KG/mm of the inlet looper 8 during welding of the strip at the inlet section 2 X 1525mm x 3.0mm = 2.06 tons;
i.e. the tension of the inlet loop 8 is transformed into:
when the band steel at the inlet section runs, the tension of the band steel at the inlet loop 8 is 2.7 tons;
when the tail part of the strip steel leaves the uncoiler 1, the tension of the inlet loop 8 is reduced to 2.06 tons;
when the front and rear strip steel are welded, the inlet section starts to operate, and the tension of the inlet loop 8 is restored to 2.7 tons.
Example 1
Existing problem cause analysis:
1. due to tail cutting, welding and other reasons, the 1# driving roller band-type brake is frequent in action, and the braking force is gradually reduced.
2. During production, no matter whether the strip steel at the inlet section stops or the loop carriage runs, the loop winding motor is in an electrified state, and the strip steel is tensioned through the steel rope and the loop carriage. When the braking force of the band-type brake is insufficient, the No. 1 driving roller is pulled into the loop, and the tail of the band steel is stopped until the winding steel rope is in loose contact with the tension loss protection switch, and the winding motor is powered off.
In order to solve the existing problems, the embodiment provides a tail-running preventing mechanism of an acid washing machine set.
1. Inlet loop tension control
1. The tension of the strip steel in the inlet section is established by the rotation speed difference of the 1# driving roller and the loop winding mechanism, and the strip steel is connected before and after the period, so that the problem of separation of the tail part of the strip steel is avoided. The tension of the strip steel is controlled according to normal parameters.
2. During welding, the tension of the inlet loop is established by the loop winding mechanism and the motor band-type brake of the No. 1 driving roller, the running speed of the loop vehicle is relatively low, the tension of the strip steel of the inlet loop is reduced during the period, and the strip steel is controlled according to 76% of normal parameters, so that the speed and probability of the tail part of the strip steel separating from the No. 1 driving roller are reduced.
2. Photoelectric sensor detection
The bits of the photosensor are set at point a. Normally, the tail part of the strip steel moves towards the No. 1 driving roller and does not exceed the position of the point A. The photoelectric sensor is used for detecting whether strip steel runs out (figure 1).
3. Pneumatic clamping plate
A pneumatic clamping plate is arranged. The function is to clamp the strip steel after the photoelectric sensor detects that the tail of the strip steel is separated. The upper and lower sides of the strip steel are respectively provided with a clamping plate, and each clamping plate is driven by a cylinder through a rubber layer attached to one side of the strip steel to increase friction force.
4. Control relation
The computer controls the inlet loop to reduce tension during welding according to the strip steel data. When the photoelectric sensor detects that the strip steel is separated from the point A, the computer gives out a power-off instruction of the loop hoisting mechanism and a clamping instruction of the clamping plate, and the loop hoisting mechanism stops tensioning the strip steel; the electromagnetic valve of the clamping plate is powered on, the air cylinder stretches out, and the tail part of the strip steel is clamped. The farther the clamping plate is from point a, the more time is won for the clamping plate to actuate. The surface of the rubber layer of the clamping plate is 5mm away from the strip steel (figures 1-3).
Parameters of interest
1. The unit tension of the inlet looper when the strip steel at the inlet section runs is 0.59KG/mm 2 。
2. Inlet looper unit tension of 0.45KG/mm during welding of inlet section strip steel 2 。
3. The photosensor is 5m from the 1# driving roller.
4. The thickness of the steel strip in the inlet loop is 3.0mm; the width is 1525mm.
(II) tension control
1. Strip tension=0.59 KG/mm of the inlet loop when the inlet section strip is running 2 X 1525mm x 3.0mm = 2.7 tons.
2. Strip tension=0.45 KG/mm of inlet loop during welding of inlet section strip 2 X 1525mm x 3.0mm = 2.06 tons.
3. Tension of the inlet loop is changed.
When the strip steel at the inlet section runs; the tension of the inlet loop strip steel is 2.7 tons;
the tail part of the strip steel leaves the uncoiler, and the tension of the inlet loop is reduced to 2.06 tons;
after the front and rear strip steel are welded, the inlet section starts to operate, and the tension of the inlet loop is restored to 2.7 tons.
(III) clamping after the tail part of the strip steel is separated
1. And (5) a clamping process. The tail part of the strip steel leaves the uncoiler, welding operation, 1# driving roller inching stopping, band-type brake non-tightening, the tail part of the strip steel leaves the point A, a photoelectric detection switch detects the strip steel to be separated, a motor of a loop winding mechanism is powered off, and winding tensioning and cutting are performed; the clamping plate acts, clamps the tail part of the strip steel, and the tail part of the strip steel stops at a position 1.5m away from the 1# driving roller.
2. And (5) processing after clamping. The clamping plate continues to clamp, the band-type brake of the No. 1 driving roller motor is inspected and processed, the operating button releases the clamping plate, the power supply of the loop winding mechanism is recovered, the tension of the inlet loop is recovered, the No. 1 driving roller is clicked, the tail part of the strip steel advances to a reverse welding position, the strip steel is welded before and after the strip steel is welded, and the normal production operation state is recovered.
Comparative example
In the prior art, the tail of the strip steel breaks away from the No. 1 driving roller and enters the inlet loop 7 times.
After the invention is applied, the accident that the tail part of the strip steel breaks away from the No. 1 driving roller and enters the inlet looper does not occur.
The invention reduces the tension of the inlet loop during welding, thereby reducing the speed and probability of separating the tail of the strip steel and providing time assurance for the clamping plate to clamp the tail of the strip steel. The photoelectric sensor is arranged behind the welding machine for detection, and a method for cutting off loop tension and clamping double protection by the clamping plate is adopted, so that reliable assurance is provided for preventing the tail of the strip steel from separating.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.
Claims (8)
1. An acid pickling line prevents running tail mechanism, which is characterized by comprising: the device comprises a welding part, a first conveying part, a pickling process section, a second conveying part and a rolling mill (18), wherein a detection clamping device is arranged on one side, connected with the welding part, of the first conveying part, the first conveying part is used for conveying the last coiled steel to the pickling process section for pickling, the second conveying part is used for conveying the pickled last coiled steel to the rolling mill (18) for cold rolling, the welding part is used for welding a coiling head (01) of the next coiled steel with a coiling tail (02) of the last coiled steel, and the detection clamping device is used for detecting whether tail separation occurs on the last coiled steel and clamping the tail of the strip steel when the tail is separated;
the clamping device (5) is a pneumatic clamping device (5) and consists of an upper clamping plate, a lower clamping plate, an air cylinder and an electromagnetic valve (6), wherein the upper clamping plate and the lower clamping plate are respectively connected with the air cylinder and are respectively arranged above and below the strip steel, the air cylinder is connected with the electromagnetic valve (6), and the electromagnetic valve (6) is electrically connected with the computer (3);
the computer (3) controls the inlet loop (8) to reduce tension according to strip steel data during welding, when the photoelectric sensor (4) detects that the tail of the strip steel breaks away from the point A, the computer (3) gives a power-off instruction of the loop winding mechanism (10) and a clamping instruction of the two clamping plates, the loop winding mechanism (10) stops tensioning the strip steel, the electromagnetic valves (6) corresponding to the two clamping plates are powered on, the air cylinder stretches out, the clamping device (5) clamps the tail of the strip steel, the upper clamping plate is in compression connection with the upper surface of the strip steel, and the lower clamping plate is in compression connection with the lower surface of the strip steel; the farther the two clamping plates are from the point A, the more sufficient time is gained for the clamping action of the clamping plates;
and the clamping process after the tail part of the strip steel is separated: after the tail part of the strip steel leaves the uncoiler (1), welding operation is carried out, meanwhile, a 1# driving roller (7) is in inching, then the 1# driving roller (7) is in inching stop, when the band-type brake is not tight, the tail part of the strip steel leaves the point A, the photoelectric sensor (4) detects the tail part of the strip steel to be separated, at the moment, a motor of a loop winding mechanism (10) is controlled to be powered off through a computer (3), and the loop winding mechanism (10) is tensioned and cut off; then, controlling the two clamping plates to act, and clamping the tail part of the strip steel to stop at a position 1.5m away from a No. 1 driving roller (7);
the processing procedure after clamping: the two clamping plates continue to clamp the tail part of the strip steel, then, the motor band-type brake of the No. 1 driving roller (7) is checked and processed, the operating button loosens the two clamping plates, meanwhile, the power supply of the loop winding mechanism (10) is recovered, the tension of the inlet loop (8) is recovered, the No. 1 driving roller (7) is clicked, the tail part of the strip steel is enabled to advance to a welding position, the strip steel before and after the strip steel can be welded, and the normal production running state is recovered.
2. The pickling line tail-preventing mechanism according to claim 1, wherein the first conveying part consists of an inlet section, a 1# driving roller (7), an inlet loop (8) and a 2# driving roller (11) which are sequentially connected from left to right, one side of the inlet section is close to a welding part and is used for fixing the tail part of the last coil of strip steel, a loop wagon (9) and a loop hoisting mechanism (10) are arranged in the inlet loop (8), the loop hoisting mechanism (10) stores the strip steel for the inlet loop (8), the loop hoisting mechanism (10) releases ropes in the time when the welding part rapidly welds the strip steel before and after, the inlet loop (8) releases the strip steel reserve in the inlet loop for the pickling process section through the 2# driving roller (11), and the loop wagon (9) runs in the emptying direction; after the welding part is welded, the inlet section fills the strip steel into the inlet loop (8) at a high speed which is more than 2 times that of the pickling process section, the loop vehicle (9) runs in the full-filling direction, and the loop hoisting mechanism (10) is used for storing the strip steel allowance for the next welding;
the pickling process section comprises a pickling part and a rinsing part dryer (14), wherein the pickling part consists of a plurality of pickling tanks (12) and is used for pickling strip steel in sequence; the rinsing part consists of a plurality of rinsing tanks (13) and is used for sequentially rinsing the strip steel after pickling; the dryer (14) dries the rinsed strip steel;
the second conveying part comprises a 3# driving roller (15), an outlet loop (16) and a loop trolley (17) which are connected with each other, wherein the 3# driving roller (15) conveys the dried strip steel to a rolling mill (18) for cold rolling through the loop trolley (17) and the outlet loop (16);
the welding part is a special laser welding machine (2), and one side of the welding part, which is far away from the inlet section, is provided with an uncoiler (1) for providing the next coil of strip steel.
3. The pickling line tail-out prevention mechanism according to claim 2, wherein the detection clamping device consists of a computer (3), a photoelectric sensor (4) and a clamping device (5), wherein the photoelectric sensor (4) is electrically connected with the computer (3), and the photoelectric sensor (4) is arranged on the inlet section at a position close to a welding part and is marked as a point A and is used for detecting whether tail-out occurs in the last coiled strip steel; the clamping device (5) is arranged at the position, close to the No. 1 driving roller (7), on the inlet section and is used for clamping the tail part of the strip steel when the tail part of the last strip steel breaks away, so that the tail part of the last strip steel is prevented from breaking away from the No. 1 driving roller (7) and entering the section of the inlet loop (8); the loop winding mechanism (10) is electrically connected with the computer (3).
4. A pickling line tailing prevention mechanism according to claim 3, characterized in that the distance of the photosensor (4) from the # 1 driving roller (7) is 5m.
5. The pickling line tailing preventing mechanism according to claim 1, wherein inner surfaces of the upper clamping plate and the lower clamping plate, which are in contact with the strip steel, are respectively lined with a rubber layer, so that friction force between the upper clamping plate and the strip steel is increased; when the clamping device (5) is in an initial state, namely the strip steel is not clamped, the distance between the surfaces of the upper rubber layer and the lower rubber layer and the strip steel is 5mm.
6. The pickling line tail-out prevention mechanism according to any one of claims 2 to 4, wherein the strip tension of the inlet section strip steel during operation is established by the rotation speed difference of a No. 1 driving roller (7) and a loop winding mechanism (10), during which the front strip steel and the rear strip steel are connected, and the problem of strip steel tail separation does not exist; controlling the tension of the strip steel according to normal parameters;
during welding, tension of the inlet loop (8) is established by a loop winding mechanism (10) and a motor band-type brake of the No. 1 driving roller (7), the running speed of the loop vehicle (9) is relatively low, and strip steel tension of the inlet loop (8) is reduced during the period and is controlled according to 76% of normal parameters, so that the speed and probability of the tail of the strip steel separating from the No. 1 driving roller (7) are reduced.
7. The pickling line tailing prevention mechanism as claimed in claim 6, wherein the inlet looper (8) unit tension is 0.59KG/mm when the inlet section strip is in operation 2 The method comprises the steps of carrying out a first treatment on the surface of the The unit tension of the inlet looper (8) during the welding of the strip steel at the inlet section is 0.45KG/mm 2 The method comprises the steps of carrying out a first treatment on the surface of the The thickness of the band steel in the inlet looper (8) is 3.0mm, and the width is 1525mm.
8. The pickling line tailing prevention mechanism as claimed in claim 7, wherein the strip tension of the inlet loop (8) during operation of the inlet section strip = 0.59KG/mm 2 X 1525mm x 3.0mm = 2.7 tons;
strip tension=0.45 KG/mm of the inlet loop (8) during strip welding of the inlet section 2 X 1525mm x 3.0mm = 2.06 tons;
namely the tension of the inlet looper (8) is converted into:
when the band steel at the inlet section runs, the tension of the band steel at the inlet loop (8) is 2.7 tons;
when the tail part of the strip steel leaves the uncoiler (1), the tension of the inlet loop (8) is reduced to 2.06 tons;
when the front and rear strip steel is welded, the inlet section starts to operate, and the tension of the inlet loopers (8) is restored to 2.7 tons.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202111068884.0A CN113751504B (en) | 2021-09-13 | 2021-09-13 | Tail-running preventing mechanism of pickling line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111068884.0A CN113751504B (en) | 2021-09-13 | 2021-09-13 | Tail-running preventing mechanism of pickling line |
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| CN113751504A CN113751504A (en) | 2021-12-07 |
| CN113751504B true CN113751504B (en) | 2023-05-26 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH0649212B2 (en) * | 1990-08-31 | 1994-06-29 | 住友金属工業株式会社 | Rewinding method of strip and its equipment |
| JP3911264B2 (en) * | 2003-10-21 | 2007-05-09 | 新日本製鐵株式会社 | Pickling device row of hot-rolled sheet and pickling method |
| CN106807760A (en) * | 2015-11-27 | 2017-06-09 | 宝山钢铁股份有限公司 | Tension force optimization method during cold-strip steel welding whipping |
| CN210614658U (en) * | 2019-09-16 | 2020-05-26 | 新余钢铁股份有限公司 | Device for preventing entrance of acid rolling unit from escaping from strip |
| CN211726951U (en) * | 2019-12-31 | 2020-10-23 | 马钢(合肥)板材有限责任公司 | Strip steel tail-flick positioning control device |
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