CN116571567A - Technological method for controlling core wave shape of thin-specification strip steel coil - Google Patents
Technological method for controlling core wave shape of thin-specification strip steel coil Download PDFInfo
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- CN116571567A CN116571567A CN202310631860.4A CN202310631860A CN116571567A CN 116571567 A CN116571567 A CN 116571567A CN 202310631860 A CN202310631860 A CN 202310631860A CN 116571567 A CN116571567 A CN 116571567A
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- coiling
- controlling
- wave shape
- tension
- core wave
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- 238000000034 method Methods 0.000 title claims abstract description 67
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 30
- 239000010959 steel Substances 0.000 title claims abstract description 30
- 230000008569 process Effects 0.000 claims abstract description 40
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 238000005096 rolling process Methods 0.000 claims abstract description 17
- 238000005554 pickling Methods 0.000 claims abstract description 16
- 239000000463 material Substances 0.000 claims abstract description 5
- 238000003466 welding Methods 0.000 claims abstract description 4
- 238000004804 winding Methods 0.000 claims description 17
- 229920003225 polyurethane elastomer Polymers 0.000 claims description 3
- 230000006872 improvement Effects 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000005406 washing Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 239000004677 Nylon Substances 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005098 hot rolling Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 230000003578 releasing effect Effects 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B1/00—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations
- B21B1/22—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length
- B21B1/24—Metal-rolling methods or mills for making semi-finished products of solid or profiled cross-section; Sequence of operations in milling trains; Layout of rolling-mill plant, e.g. grouping of stands; Succession of passes or of sectional pass alternations for rolling plates, strips, bands or sheets of indefinite length in a continuous or semi-continuous process
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/28—Control of flatness or profile during rolling of strip, sheets or plates
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/56—Elongation control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21B—ROLLING OF METAL
- B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
- B21B37/58—Roll-force control; Roll-gap control
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D1/00—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling
- B21D1/02—Straightening, restoring form or removing local distortions of sheet metal or specific articles made therefrom; Stretching sheet metal combined with rolling by rollers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D45/00—Ejecting or stripping-off devices arranged in machines or tools dealt with in this subclass
- B21D45/06—Stripping-off devices
-
- 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
-
- 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
- B21B2015/0057—Coiling the rolled product
-
- 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
- B21B2015/0092—Welding in the rolling direction
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Winding, Rewinding, Material Storage Devices (AREA)
Abstract
The invention provides a process method for controlling the core wave shape of a thin-specification strip steel coil, which comprises the following steps: the method comprises the following steps of uncoiling, welding, descaling, pickling, flattening, withdrawal straightening, oiling, coiling and the like, wherein the pickling flattening coil is manufactured by the raw material strip steel based on endless rolling, and the processes of the working procedures are correspondingly adjusted; wherein, the convexity of the raw materials is pre-controlled; controlling the elongation and rolling force in the procedures of descaling, flattening and straightening; the material used by the coiling machine reel is adjusted in the coiling process, and the coiling tension in the coiling process is adjusted. The process method for controlling the core wave shape of the thin-specification strip steel coil realizes the improvement of the hot-rolled thin-specification soft steel coil core wave shape after pickling, improves the quality of a product object, and improves the market competitiveness of the product.
Description
Technical Field
The invention relates to the technical field of production of thin strip steel of a continuous pickling and leveling unit, in particular to a process method for controlling the core wave shape of a thin strip steel coil.
Background
With the continuous progress of steel rolling process technology, the performance of a hot rolled sheet is approaching to that of a cold rolled sheet, so that the hot rolling is technically realized instead of cold, the development of a headless rolling production process is realized, the production of domestic hot rolled extremely thin strip steel products is realized, but from the characteristics of softer and thinner hot rolled production process and products, the thin hot rolled strip steel which is not subjected to an annealing process has serious coil core wave shape after being subjected to cold rolling, pickling and coiling, particularly the product with the thickness less than 1.2mm, and the quality complaint is more, so that the acceptance of users on the products is influenced; in the internal slitting scheme, the amount of improvement is continuously increased because of the roll core wave-shaped backspacing.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides the process method for controlling the core wave shape of the thin-specification strip steel coil, which realizes the improvement of the core wave shape of the hot-rolled thin-specification mild steel coil after pickling, improves the quality of a product object, and improves the market competitiveness of the product.
In order to achieve the above purpose, the invention provides a process method for controlling the core wave shape of a thin-gauge strip coil, which comprises the following steps: the method comprises the following steps of uncoiling, welding, descaling, pickling, flattening, withdrawal straightening, oiling, coiling and the like, wherein the pickling flattening coil is manufactured by the raw material strip steel based on endless rolling, and the processes of the working procedures are correspondingly adjusted;
wherein, the convexity of the raw materials is pre-controlled; controlling the elongation and rolling force in the procedures of descaling, flattening and straightening; the material used by the coiling machine reel is adjusted in the coiling process, and the coiling tension in the coiling process is adjusted.
Wherein, the convexity of the raw materials is controlled within 20 micrometers in the process of pre-controlling the convexity of the raw materials.
Wherein, in the processes of scale breaking, flattening and tension straightening, a scale breaker uses an elongation mode, the elongation is given by 0.5%, a flattening machine uses a rolling force mode, the rolling force is given by 2000-2500KN, the tension straightening machine uses an elongation mode, and the elongation is given by 0.2%.
Wherein the coiling machine winding drum is a polyurethane rubber sleeve in the coiling process, and the hardness is controlled to be HK60-70.
Wherein, the winding tension mode is designed in a sectional way in the winding process, the thickness is no more than 1.2mm, and the winding tension is set to be L2:18-24KN.
The method comprises the steps of adjusting and designing a variable-tension winding mode in the winding process, using 1/2L2 winding tension for the belt head 0-100 m, using 2/3L2 winding tension for the belt head 100-200 m interval, and recovering the residual length to be set to the tension L2.
Compared with the prior art, the invention has the advantages and positive effects that:
the invention is based on that the endless rolling thickness is 0.8-1.5mm, the yield strength is 220-280MPa, the convexity of the raw material is 25-30 microns, the pickling and leveling unit is controlled by using the original design process, the coiling tension is 20-28KN, the elongation of a scale breaker is 0.8%, the leveling elongation is 1.5%, the elongation of a withdrawal and leveling machine is 0.4%, and the coiled inner ring is coiled to be about 45 meters through the pickling and leveling unit, and the wave shape in an uncertain form appears;
the process method for controlling the core wave shape of the thin-specification strip steel coil provided by the invention effectively improves the core wave shape of the thin-specification strip steel coil by optimizing coiling tension and elongation distribution, the length of the core wave shape is no more than 5 meters, and the requirements of customers on products are met, namely, the hot-rolled thin-specification raw materials and the pickling leveling process are optimally adjusted, the core wave shape of the hot-rolled thin-specification strip steel coil is effectively improved, and the market competitiveness is effectively improved.
Detailed Description
The present invention will be specifically described below by way of exemplary embodiments. It is to be understood that structures and features in one embodiment may be beneficially incorporated in other embodiments without further recitation.
The invention provides a process method for controlling the core wave shape of a thin-specification strip steel coil, which comprises the following steps: the raw material strip steel based on endless rolling is manufactured into an acid-washing leveling coil through main working procedures of uncoiling, welding, descaling, acid-washing, leveling, withdrawal straightening, oiling, coiling and the like, and meanwhile, the corresponding adjustment is adopted for the working procedures, so that the quality of the acid-washing finished coiled strip steel is improved.
Wherein, the convexity of the raw materials is pre-controlled; controlling the elongation and rolling force in the procedures of descaling, flattening and straightening; the material used by the coiling machine reel is adjusted in the coiling process, and the coiling tension in the coiling process is adjusted.
It should be noted that in the aspect of the inlet raw material, the convexity of the raw material is not changed after each working procedure of the pickling and leveling line, and for this purpose, the convexity of the raw material is pre-controlled and controlled within 20 micrometers in this embodiment. Therefore, during the coiling process, the convexity of the strip steel is accumulated, and the stress of the inner ring is reduced, so that the stress can be effectively released.
The mechanical properties of the pickling coil finished product can be subjected to work hardening during the procedures of descaling, flattening and straightening, the tensile deformation change is not obvious, and the pressure deformation change is obvious; therefore, when the thickness of the finished product and the yield strength required by customers are ensured, the scale breaker in the embodiment uses an elongation mode, the elongation is given by 0.5%, the temper mill uses a rolling force mode, the rolling force is given by 2000-2500KN, the withdrawal and straightening machine uses an elongation mode, and the elongation is given by 0.2%.
It should be noted that the first influencing factor is the stiffness of the reel: the lower the hardness of the material of the winding drum is, the better the stress releasing effect on the inner ring is. Therefore, in the embodiment, the nylon diameter-increasing plate used by the coiling machine coiling block is modified into the polyurethane rubber sleeve with the hardness HK of 95-105 and the hardness of 60-70; the stable coiled shape of the coiled coil is ensured, and the stress release of the inner ring of the finished coil can be effectively improved.
It should be noted that, at the time of winding, still another influencing factor is the winding tension magnitude: the smaller the winding tension is, the smaller the stress deformation accumulated and concentrated on the inner ring is; in the embodiment, the winding tension mode is designed in a segmented mode, the thickness is no more than 1.2mm, the winding tension is set to be L2:18-24KN, the operation requirement of a winding machine is met, and the influence of the winding tension is reduced; meanwhile, a variable tension coiling mode is designed in the embodiment, the coiling tension of 1/2L2 is used for the belt head 0-100 m, the coiling tension of 2/3L2 is used for the belt head 100-200 m interval, and the residual length is recovered to be set to the tension L2.
In conclusion, the process method for controlling the core wave shape of the thin-specification strip steel coil provided by the invention effectively improves the core wave shape of the thin-specification strip steel coil by optimizing coiling tension and elongation distribution, the length of the core wave shape is no more than 5 meters, and the requirements of customers on products are met, namely, the hot-rolled thin-specification raw materials and the pickling leveling process are optimally adjusted, the core wave shape of the hot-rolled thin-specification strip steel coil is effectively improved, and the market competitiveness is effectively improved.
Of course, the present invention is capable of other various embodiments and its several details are capable of modification and variation in light of the present invention, as will be apparent to those skilled in the art, without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A process method for controlling the core wave shape of a thin-specification strip steel coil is characterized by comprising the following steps: the process method comprises the following steps: the method comprises the following steps of uncoiling, welding, descaling, pickling, flattening, withdrawal straightening, oiling, coiling and the like, wherein the pickling flattening coil is manufactured by the raw material strip steel based on endless rolling, and the processes of the working procedures are correspondingly adjusted;
wherein, the convexity of the raw materials is pre-controlled; controlling the elongation and rolling force in the procedures of descaling, flattening and straightening; the material used by the coiling machine reel is adjusted in the coiling process, and the coiling tension in the coiling process is adjusted.
2. The process for controlling the core wave shape of a thin gauge strip coil of steel as set forth in claim 1, wherein: and controlling the convexity of the raw materials to be within 20 microns in the process of pre-controlling the convexity of the raw materials.
3. The process for controlling the core wave shape of a thin gauge strip coil of steel as set forth in claim 1, wherein: in the processes of scale breaking, flattening and tension straightening, a scale breaker uses an elongation mode, the elongation is given by 0.5%, a flattening machine uses a rolling force mode, the rolling force is given by 2000-2500KN, the tension straightening machine uses an elongation mode, and the elongation is given by 0.2%.
4. The process for controlling the core wave shape of a thin gauge strip coil of steel as set forth in claim 1, wherein: the coiling machine winding drum is a polyurethane rubber sleeve in the coiling process, and the hardness is controlled to be HK60-70.
5. The process for controlling the core wave shape of a thin gauge strip coil of steel as set forth in claim 1, wherein: in the coiling process, the coiling tension mode is designed in a segmented mode, the thickness is no more than 1.2mm, and the coiling tension is set to be L2:18-24KN.
6. The process for controlling the core wave shape of a thin gauge strip coil of steel as set forth in claim 1, wherein: in the coiling process, the variable tension coiling mode is adjusted and designed, the coiling tension of the belt head is 1/2L2 in 0-100 m, the coiling tension of the belt head is 2/3L2 in the interval of 100-200 m, and the residual length is recovered to be set to be the tension L2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310631860.4A CN116571567A (en) | 2023-05-31 | 2023-05-31 | Technological method for controlling core wave shape of thin-specification strip steel coil |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310631860.4A CN116571567A (en) | 2023-05-31 | 2023-05-31 | Technological method for controlling core wave shape of thin-specification strip steel coil |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116571567A true CN116571567A (en) | 2023-08-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310631860.4A Pending CN116571567A (en) | 2023-05-31 | 2023-05-31 | Technological method for controlling core wave shape of thin-specification strip steel coil |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116571567A (en) |
-
2023
- 2023-05-31 CN CN202310631860.4A patent/CN116571567A/en active Pending
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