CN111804740B - Method for threading whole-line strip steel on acid rolling production line - Google Patents
Method for threading whole-line strip steel on acid rolling production line Download PDFInfo
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- CN111804740B CN111804740B CN202010683843.1A CN202010683843A CN111804740B CN 111804740 B CN111804740 B CN 111804740B CN 202010683843 A CN202010683843 A CN 202010683843A CN 111804740 B CN111804740 B CN 111804740B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B39/00—Arrangements for moving, supporting, or positioning work, or controlling its movement, combined with or arranged in, or specially adapted for use in connection with, metal-rolling mills
- B21B39/14—Guiding, positioning or aligning work
- B21B39/16—Guiding, positioning or aligning work immediately before entering or after leaving the pass
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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
- C23G1/00—Cleaning or pickling metallic material with solutions or molten salts
- C23G1/02—Cleaning or pickling metallic material with solutions or molten salts with acid solutions
- C23G1/08—Iron or steel
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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
- C23G3/025—Details of the apparatus, e.g. linings or sealing means
- C23G3/026—Details of the apparatus, e.g. linings or sealing means for guiding the objects
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- Chemical Kinetics & Catalysis (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Cleaning And De-Greasing Of Metallic Materials By Chemical Methods (AREA)
Abstract
The invention discloses a method for threading a full-line strip steel on an acid rolling production line, and belongs to the technical field of metallurgy. The method for threading the whole strip steel of the rolling production line comprises the following steps: pressing down the leading belt by the compression rollers of the No. 2 tension roller, the No. 3 tension roller and the No. 2 steering roller, building a first low tension at an inlet loop, and penetrating the belt head to the No. 1 tension roller by an inlet operating chamber group point-acting punch sleeve; the inlet loop is threaded in a tension-free mode, the inlet operating chamber group is selected to a No. 1 tension roller in a point-motion mode, a No. 2 steering roller and a No. 2 tension roller pressing roller are lifted by a tension leveler, and the inlet operating chamber is linked with the tension leveler to complete the inlet loop threading work; and (3) after the strip steel passes through the withdrawal and straightening unit, conveying the strip head to the inlet of a pickling tank. The method for threading the whole strip steel of the acid rolling production line can safely thread the strip steel and can effectively reduce the threading time of the whole strip steel of the acid rolling production line.
Description
Technical Field
The invention relates to a method for threading a full-line strip steel on an acid rolling production line.
Background
The acid rolling production line has the condition that strip withdrawing is needed in running production, such as: and overhauling, replacing the tension roller and the like. The situation of difficult threading is caused by large thickness and high hardness of the raw material strip steel of the acid rolling production line.
The problems of leading belt breakage, band steel deviation and the like caused by operation and matching errors are easily caused when the single-body inching equipment is threaded in a tension-free mode, the whole-line threading time exceeds 12 hours due to the difficulties, and the conditions of equipment damage, leading belt breakage and the like caused by improper operation can also occur.
Disclosure of Invention
The invention provides a method for threading a full-line strip steel on an acid rolling production line, which solves or partially solves the technical problems that in the prior art, when a single-body inching device is used for threading in a tension-free mode, the threading is easy to cause the problems of breakage of the threading, deviation of the strip steel and the like caused by misoperation, the threading time of the full line exceeds 12 hours, and the conditions of damage of the device, breakage of the threading and the like caused by improper operation can also occur.
In order to solve the technical problem, the invention provides a method for threading the whole-line strip steel of the acid rolling production line, which comprises the following steps: preparing a tape head, and connecting a leading tape with the tape head; pressing down the leading belt by the compression rollers of the No. 2 tension roller, the No. 3 tension roller and the No. 2 steering roller, building a first low tension at an inlet loop, and penetrating the belt head to the No. 1 tension roller by an inlet operating chamber group point-acting punch sleeve; the inlet loop is threaded in a tension-free mode, the inlet operation chamber group is selected to be a No. 1 tension roller in a inching mode, a No. 2 steering roller and a No. 2 tension roller pressing roller are lifted by a tension leveler, and the inlet operation chamber is linked with the tension leveler to complete the threading work of the inlet loop; after the strip steel passes through a withdrawal and straightening machine, conveying the strip head to an inlet of a pickling tank; when the belt head penetrates to the inlet of the acid tank No. 2 of the acid tank, the belt is guided to penetrate through the tension roller No. 4, the outlet loop No. 2 is in a tension-free mode, the second low tension is established in the outlet loop No. 1, the pickling process section is started in the pickling operation chamber after the tension is established, the tension roller No. 4 is started in the selection group, the pickling section is linked with the tension roller No. 4 to penetrate the belt head to the tension roller No. 4, the pickling operation chamber is stopped, and the belt is guided through the outlet loop No. 2 and the inlet of the rolling mill; after the threading of the leading belt of the No. 2 outlet loop is finished, the press roll of the No. 5 tension roll is pressed down, the third low tension is established for the No. 2 outlet loop, the pickling circle shear group is inching to fill the loop, the No. 5 tension roll group is inching to draw the loop, and the strip steel is smoothly threaded to the inlet of the rolling mill.
Further, the preparing the tape head comprises: cutting a trapezoidal lug at the front end of the strip steel; punching a leading hole on the trapezoidal bump; and folding the trapezoidal bulges towards the rear end direction of the strip steel, and welding.
Further, the inlet loop is constructed with a first low tension not more than 30kn and not more than 10 kn.
Further, the transporting the strip head to the pickling tank inlet comprises: after the strip steel passes through the withdrawal and straightening machine, a strip head is hung to the inlet of the pickling tank by using a crown block; the belt head is manually dragged to enter the acid tank inlet No. 2 of the acid tank.
Further, the number 1 outlet loop is set with a second low tension less than or equal to 30kn and less than or equal to 10 kn.
Further, when the No. 4 tension roller selection group is inching, the No. 4 steering roller rotates.
Further, after the tape threading of the No. 2 outlet loop tape guide is finished, the tape guide is wound on the tape guide winding drum.
Further, a third low tension is established at an outlet number 2 which is less than or equal to 10kn and less than or equal to 30 kn.
Further, when the No. 5 tension roller group inching takes out the sleeve, the No. 5 tension roller group inching needs to stop for 1-2 seconds every 8-12 seconds.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the belt head is prepared, the belt head is connected with the belt head, the compression roller of the tension roller No. 2, the tension roller No. 3 and the steering roller No. 2 presses down the belt head, the first low tension is established by the inlet loop, the belt head is threaded to the tension roller No. 1 by the inlet operating chamber set point moving punch sleeve, the belt is threaded by the inlet loop in a tension-free mode, the tension roller No. 1 is selected by the inlet operating chamber set point moving, the tension roller No. 2 and the compression roller No. 2 are lifted by the tension leveler, the inlet operating chamber is linked with the tension leveler to complete the work of threading the inlet loop, the belt head is conveyed to the inlet of the pickling tank after the strip steel passes through the tension leveler, so the belt head can be protected, the tension between the tension roller No. 2 and the tension roller No. 3 is avoided, the breakage of the belt is prevented, the belt passes through the tension roller No. 4 when the belt head passes through the inlet of the pickling tank No. 2, the tension-free mode is established by the outlet loop No. 2, the second low tension is established by the outlet loop No. 1, after the tension is built, the pickling operation chamber group inching pickling process section, the No. 4 tension roller selection group inching, the pickling section and the No. 4 tension roller are linked to enable a belt head to penetrate to the No. 4 tension roller, the pickling operation chamber stops, the No. 2 outlet loop and rolling mill inlet penetrating belt work is conducted, after the No. 2 outlet loop penetrating belt is completed, after a press roller of the No. 5 tension roller is pressed down, the No. 2 outlet loop builds third low tension, the pickling disc shear group inching fills the belt, the No. 5 tension roller group inching extracts the belt, the strip steel is smoothly penetrated to the rolling mill inlet, therefore, the strip steel can be safely penetrated, and the strip penetrating time of the whole line strip steel of the pickling production line can be effectively reduced.
Drawings
Fig. 1 is a schematic flow chart of a method for threading a full-line strip steel of an acid rolling production line according to an embodiment of the present invention.
Detailed Description
Referring to fig. 1, the method for threading the full-line strip steel on the acid rolling production line provided by the embodiment of the invention comprises the following steps:
step 1, preparing a tape head, and connecting a leading tape with the tape head.
And 2, pressing down the leading belt by the compression rollers of the tension roller No. 2, the tension roller No. 3 and the steering roller No. 2, building a first low tension at an inlet loop, and penetrating a belt head to the tension roller No. 1 by a point-moving punching sleeve of an inlet operation chamber group.
And 3, threading the inlet loop in a tension-free mode, selecting a No. 1 tension roller by the inlet operating chamber group in a inching mode, lifting a No. 2 steering roller and a No. 2 tension roller pressing roller by a tension leveler, and linking the inlet operating chamber with the tension leveler to complete the threading work of the inlet loop.
And 4, conveying the strip head to the inlet of the pickling tank after the strip steel passes through the withdrawal and straightening machine.
And 5, when the belt head penetrates to the inlet of the acid tank No. 2 of the acid tank, the belt is guided to penetrate through the tension roller No. 4, the outlet loop No. 2 is in a tension-free mode, the outlet loop No. 1 establishes second low tension, the pickling process section is inching by the pickling operation chamber group after the tension is established, the tension roller No. 4 is inching by the tension roller No. 4, the pickling operation chamber stops after the belt head is penetrated to the tension roller No. 4 by the linkage of the pickling section and the tension roller No. 4, and the belt is guided by the outlet loop No. 2 and the inlet of the rolling mill.
And 6, after the tape threading of the No. 2 outlet loop is finished, pressing down a press roll of the No. 5 tension roll, establishing a third low tension for the No. 2 outlet loop, performing loop filling by the aid of the pickling circle shear group, performing loop drawing by the aid of the No. 5 tension roll group, and smoothly threading the strip steel to an inlet of a rolling mill.
The specific implementation mode of the application is that a belt head is prepared, a leading belt is connected with the belt head, a pressure roller of a tension roller No. 2, a tension roller No. 3 and a steering roller No. 2 presses down the leading belt, a first low tension is established in an inlet loop, an inlet operating chamber set is used for inching a punching sleeve to lead the belt head to a tension roller No. 1, the inlet loop is used for threading the belt in a tension-free mode, the inlet operating chamber set is used for inching to select the tension roller No. 1, a tension leveler lifts the pressure roller of the tension roller No. 2 and the tension roller No. 2, the inlet operating chamber is linked with a tension leveler to complete the threading work of the inlet loop, the belt head is transported to the inlet of a pickling bath after a strip steel passes through the tension leveler, so that the leading belt can be protected, the tension between the tension roller No. 2 and the tension roller No. 3 is avoided, the leading belt is prevented from being broken, when the belt head is threaded to the inlet of an acid bath No. 2 of the pickling bath, the leading belt passes through the tension roller No. 4, the tension roller No. 2 outlet loop is in a tension-free mode, the second low tension is established by the No. 1 outlet loop, the pickling process section is inching in the pickling operation chamber group after the completion of the tension establishment, the No. 4 tension roller selection group is inching, the pickling section is linked with the No. 4 tension roller to penetrate the belt head to the No. 4 tension roller, the pickling operation chamber stops, the No. 2 outlet loop and the rolling mill inlet are penetrated and taken, after the belt penetrating of the No. 2 outlet loop is completed, the third low tension is established by the No. 2 outlet loop after the pressing roller of the No. 5 tension roller is pressed down, the pickling disc shear group is inching to fill the sleeve, the No. 5 tension roller group is inching to draw the sleeve, the strip steel is smoothly penetrated to the rolling mill inlet, therefore, the safe belt penetrating can be realized, and the strip steel penetrating time of the whole production line of the acid production line rolling can be effectively reduced.
Specifically, preparing the tape head includes:
and step 1-1, cutting trapezoidal bumps at the front end of the strip steel to facilitate the preparation of a strip head.
And step 1-2, punching a leading belt hole on the trapezoidal bump, so that the leading belt is conveniently connected with the belt head.
And 1-3, folding the trapezoidal bulges towards the rear end of the strip steel, and welding.
Specifically, a first low tension is established at an inlet loop with the tension being more than or equal to 10kn and less than or equal to 30kn, and the condition that the leading belt does not stay in the vehicle is ensured.
Specifically, transporting the strip head to the pickling tank inlet comprises:
after the strip steel passes through the withdrawal and straightening unit, a crane is used for hoisting a strip head to the inlet of the pickling tank; the belt head is dragged manually and enters the inlet of the No. 2 acid tank of the acid washing tank, so that the operation is convenient.
Specifically, the second low tension of the number 1 outlet loop is not less than 10kn and not more than 30kn, so that the leading belt is ensured not to remain on the vehicle.
Specifically, when the No. 4 tension roller selects the group to jog, the No. 4 steering roller rotates, and the driving performance is ensured.
Specifically, after the tape threading of the No. 2 outlet loop tape is finished, the tape is reeled onto the tape guiding winding drum, so that the interference of the tape guiding on subsequent actions is avoided.
Specifically, a third low tension of No. 2 outlet loop construction with 10kn is no more than 30kn, and the condition that the leading belt does not stay in the vehicle is ensured.
Specifically, when the No. 5 tension roller group inching takes out the sleeve, the No. 5 tension roller group inching needs to stop for 1-2 seconds every 8-12 seconds, and the continuous inching of the No. 5 tension roller group is avoided to cause the continuous increase of the actual tension.
In order to more clearly describe the embodiments of the present invention, the following description is made in terms of the method of using the embodiments of the present invention.
The acid rolling production line is used for threading the strip in the whole line, the thickness of the threaded hot rolled strip steel is 2.5mm 1137mm, and the steel grade is SPHC.
Preparing a tape head, and connecting a leading tape with the tape head.
And pressing the leading belt by the compression rollers of the No. 2 tension roller, the No. 3 tension roller and the No. 2 steering roller, building a first low tension of 20kn at an inlet loop, and penetrating the belt head to the No. 1 tension roller by the point-action punch sleeve of the inlet operation chamber group.
The inlet loop is threaded in a tension-free mode, the inlet operating chamber group is selected to the No. 1 tension roller in a inching mode, the No. 2 steering roller and the No. 2 tension roller pressing roller are lifted up by the tension leveler, and the inlet operating chamber is linked with the tension leveler to complete the inlet loop threading work.
And (4) after the strip steel passes through the withdrawal and straightening machine, conveying a strip head to an inlet of a pickling tank.
When the belt head passes to when the No. 2 acid tank entry of descaling bath, draw the area and pass No. 4 tension rollers, No. 2 export loop is no tension mode, and No. 1 export loop is built the second low tension of 15kn, builds a pickling process section of inching of pickling operation room group after accomplishing, and No. 4 tension rollers select the group inching, and the pickling section is worn the belt head to No. 4 tension rollers with No. 4 tension rollers linkage, and the pickling operation room stops, carries out No. 2 export loop and rolling mill entry and wears to draw the area work.
After the threading of the leading belt of the No. 2 outlet loop is finished, the compression roller of the No. 5 tension roller is pressed down, the No. 2 outlet loop builds a third low tension of 20kn, the pickling circle shear group is moved in a point mode to fill the sleeve, the No. 5 tension roller group is moved in a point mode to draw the sleeve, the strip steel is smoothly threaded to the inlet of the rolling mill, and the threading of the whole strip steel of the pickling and rolling production line is completed within 6.5 hours on the premise of guaranteeing the personal safety and the equipment safety.
Finally, it should be noted that the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting, and although the present invention is described in detail with reference to examples, it should be understood by those skilled in the art that modifications or equivalent substitutions may be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the claims of the present invention.
Claims (6)
1. A method for threading a full-line strip steel of an acid rolling production line is characterized by comprising the following steps:
preparing a tape head, and connecting a leading tape with the tape head;
pressing down the leading belt by compression rollers of a No. 2 tension roller, a No. 3 tension roller and a No. 2 steering roller, building a first low tension at an inlet loop, and penetrating a belt head to the No. 1 tension roller by a point-moving charging sleeve of an inlet operation chamber group;
the inlet loop is threaded in a tension-free mode, the inlet operation chamber group is selected to be a No. 1 tension roller in a inching mode, the No. 2 steering roller and the No. 2 tension roller pressing roller are lifted by the tension leveler, and the inlet operation chamber is linked with the tension leveler to complete the inlet loop threading work;
after the strip steel passes through the withdrawal and straightening machine, conveying the strip head to the inlet of a pickling tank;
when the belt head penetrates to the inlet of the acid tank No. 2 of the acid tank, the belt is guided to penetrate through the tension roller No. 4, the outlet loop No. 2 is in a tension-free mode, the second low tension is established in the outlet loop No. 1, the pickling process section is started in the pickling operation chamber after the tension is established, the tension roller No. 4 is started in the selection group, the pickling section is linked with the tension roller No. 4 to penetrate the belt head to the tension roller No. 4, the pickling operation chamber is stopped, and the belt is guided through the outlet loop No. 2 and the inlet of the rolling mill;
after the threading of the leading belt of the No. 2 outlet loop is finished, pressing down a press roll of the No. 5 tension roll, establishing a third low tension for the No. 2 outlet loop, performing the sleeve filling by the acid cleaning circle shear group, performing the sleeve drawing by the No. 5 tension roll group, and smoothly threading the strip steel to the inlet of the rolling mill;
the inlet loop is set to have a first low tension of less than or equal to 30kn and less than or equal to 10 kn;
a second low tension is less than or equal to 30kn when the number 1 outlet is looped;
the third low tension is less than or equal to 30kn at the outlet number 2 loop with the tension being less than or equal to 10 kn.
2. The method for threading the full-line strip steel of the acid rolling production line according to claim 1, wherein the preparing the strip head comprises the following steps of:
cutting trapezoidal lugs at the front end of the strip steel;
punching a leading hole on the trapezoidal bump;
and folding the trapezoidal lug towards the rear end of the strip steel, and welding.
3. The method for threading the full-line strip steel of the pickling line according to claim 1, wherein the step of conveying the strip head to the inlet of the pickling tank comprises the following steps:
after the strip steel passes through the withdrawal and straightening machine, a strip head is hung to the inlet of the pickling tank by using a crown block;
the belt head is manually dragged to enter the acid tank inlet No. 2 of the acid tank.
4. The method for threading the full-line strip steel of the acid rolling production line according to claim 1, which is characterized by comprising the following steps of:
when the No. 4 tension roller selection group is inching, the No. 4 steering roller rotates.
5. The method for threading the full-line strip steel of the acid rolling production line according to claim 1, which is characterized by comprising the following steps of:
and after the tape threading of the No. 2 outlet loop tape guide is finished, the tape guide is wound on the tape guide winding drum.
6. The method for threading the full-line strip steel of the acid rolling production line according to claim 1, which is characterized by comprising the following steps of:
when the tension roller set No. 5 is inching for sleeve drawing, the inching of the tension roller set No. 5 needs to be stopped for 1-2 seconds every 8-12 seconds.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010683843.1A CN111804740B (en) | 2020-07-16 | 2020-07-16 | Method for threading whole-line strip steel on acid rolling production line |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010683843.1A CN111804740B (en) | 2020-07-16 | 2020-07-16 | Method for threading whole-line strip steel on acid rolling production line |
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| CN111804740A CN111804740A (en) | 2020-10-23 |
| CN111804740B true CN111804740B (en) | 2022-07-15 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0578690A (en) * | 1991-09-24 | 1993-03-30 | Nkk Corp | Cold calendering process for thin stainless steel band |
| CN102773257A (en) * | 2012-07-11 | 2012-11-14 | 中冶南方工程技术有限公司 | Hot-rolled austenitic stainless steel band steel annealing pickling line inlet device and annealing process thereof |
| CN102744277B (en) * | 2012-07-23 | 2015-03-04 | 中冶南方工程技术有限公司 | Method for producing cold-rolled stainless steel annealing and pickling brand steel |
| CN108660467A (en) * | 2017-03-28 | 2018-10-16 | 宝山钢铁股份有限公司 | A kind of threading method of pickling unit |
| CN110918654B (en) * | 2019-12-02 | 2022-03-08 | 北京首钢冷轧薄板有限公司 | Threading control method and device |
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