CN115156292A - Method for manufacturing high-efficiency cold-rolled product - Google Patents
Method for manufacturing high-efficiency cold-rolled product Download PDFInfo
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- CN115156292A CN115156292A CN202210642541.9A CN202210642541A CN115156292A CN 115156292 A CN115156292 A CN 115156292A CN 202210642541 A CN202210642541 A CN 202210642541A CN 115156292 A CN115156292 A CN 115156292A
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 37
- 238000005096 rolling process Methods 0.000 claims abstract description 71
- 238000000137 annealing Methods 0.000 claims abstract description 28
- 239000002253 acid Substances 0.000 claims abstract description 10
- 238000005554 pickling Methods 0.000 claims abstract description 10
- 238000005520 cutting process Methods 0.000 claims abstract description 7
- 238000001125 extrusion Methods 0.000 claims description 11
- 230000008569 process Effects 0.000 description 19
- 229910000831 Steel Inorganic materials 0.000 description 13
- 239000010959 steel Substances 0.000 description 13
- 239000000758 substrate Substances 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 4
- 239000010960 cold rolled steel Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005482 strain hardening Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
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- 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
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- 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
- B21B37/16—Control of thickness, width, diameter or other transverse dimensions
- B21B37/22—Lateral spread control; Width control, e.g. by edge rolling
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/52—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for wires; for strips ; for rods of unlimited length
- C21D9/54—Furnaces for treating strips or wire
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- 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
- B21B2001/221—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 by cold-rolling
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Abstract
The application discloses a method for manufacturing a high-efficiency cold-rolled product. The method comprises the following steps: roughly rolling the provided plate blank according to the first head-tail short stroke value, and controlling the roughly rolling vertical roll to extrude the head and the tail of the plate blank to be larger than the middle section of the plate blank according to the first head-tail short stroke value of the roughly rolling vertical roll in the roughly rolling process so as to obtain an intermediate blank meeting the preset dimension specification; the preset dimension specification is that the widths of the head part and the tail part of the intermediate blank are both smaller than the width of the middle section; and (3) carrying out finish rolling on the intermediate blank to obtain a hot rolled coil, and carrying out acid pickling cold continuous rolling, bell-type furnace annealing, leveling by a leveling machine, finishing split coil or plate cutting on the hot rolled coil in sequence to obtain a cold rolled product. According to the embodiment of the application, the problems of low yield and low production efficiency of the existing cold-rolled product caused by edge wrapping can be solved.
Description
Technical Field
The application belongs to the technical field of rolling processes, and particularly relates to a high-efficiency cold-rolled product manufacturing method.
Background
In the process of steel smelting, raw materials for steel smelting are smelted into a plate blank material, and then the plate blank material is subjected to rough rolling and finish rolling to obtain a hot rolled coil with the thickness, width, surface quality, plate shape and the like meeting product standards. The hot rolled coil is conveyed into a cold continuous rolling unit, the oxidized iron sheet on the surface of the intermediate blank is removed in an acid pickling cold continuous rolling mode, so that the thicker hot rolled coil is rolled into a thinner cold hard coil, the cold hard coil also needs annealing, and the work hardening of the cold hard coil generated by the cold continuous rolling is eliminated through the annealing.
The bell-type furnace annealing is a common annealing mode in domestic cold-rolled sheet mills at present. The conventional bell-type furnace annealing mainly comprises the steps of turning a vertical chilled coil into a horizontal state through a tilting machine, putting the horizontal chilled coil into the bell-type furnace through a vertical clamp, and annealing the chilled coil in the bell-type furnace by separating the chilled coil by a convection plate in the furnace.
However, in the above-mentioned bell-type annealing process, the inner ring and the outer ring of the chilled coil are often stuck together by the extrusion of the convection plate of the bell-type furnace, thereby producing a hem at the edge of the chilled coil. The edge covering affects the quality of the final finished steel coil, so that the edge covering part needs to be manually cut off before the next processing of annealing, and thus, the yield and the production efficiency of the cold-rolled product are affected.
Disclosure of Invention
The embodiment of the application provides a method for manufacturing a high-efficiency cold-rolled product, which can solve the problems of low yield and low production efficiency of the cold-rolled product produced by the conventional bell-type furnace.
Specifically, the embodiment of the application provides a method for manufacturing a high-efficiency cold-rolled product, which comprises the following steps:
roughly rolling the provided plate blank according to the first head and tail short stroke value, and controlling the extrusion degree of the roughly rolling vertical roll to the head and the tail of the plate blank to be larger than the extrusion degree to the middle section of the plate blank according to the first head and tail short stroke value of the roughly rolling vertical roll in the rough rolling process so as to obtain an intermediate blank meeting the preset dimension specification; the preset size specification is that the widths of the head part and the tail part of the intermediate blank are smaller than the width of the middle section;
and (3) finely rolling the intermediate blank to obtain a hot rolled coil, and sequentially carrying out acid pickling cold continuous rolling, bell-type furnace annealing, leveling by a leveling machine, finishing split coil or plate cutting on the hot rolled coil to obtain a cold rolled product.
In some embodiments, the first head and tail short stroke value ranges from-11 to 8 millimeters.
In some embodiments, before the rough rolling of the provided slab according to the first short end-to-end stroke value, the method further comprises:
and setting a first head and tail short stroke value of the rough rolling vertical roll aiming at a plurality of target positions of the head and the tail of the plate blank under the condition that the target positions are in different thickness sections.
In some embodiments, the first head-to-tail short stroke value comprises a first head short stroke value ranging from-5 to 3 millimeters with the target position on a first edge, the first edge being an edge of the head of the slab away from the tail;
and under the condition that the distance between the target position and the first side is a preset distance, the range of the first head short stroke value is 2-8 mm.
In some embodiments, the first head-to-tail short stroke value comprises a first tail short stroke value, the tail short stroke value ranging from-11 to-5 millimeters with the target position on a second edge, the second edge being an edge of the tail of the slab away from the head;
and under the condition that the distance between the target position and the first edge is a preset distance, the range of the first tail short stroke value is-4-0 mm.
In an embodiment, before the rough rolling of the provided slab according to the first head-to-tail short stroke value, the method further comprises:
adjusting the original plate blank mark of the plate blank into a plate blank mark;
and determining whether to carry out rough rolling on the provided slab according to the first head and tail short stroke value according to the slab grade.
In the application, the width of the head and the tail of the intermediate blank is controlled to be smaller than that of the middle section in the rough rolling process only by optimizing the head-tail short stroke value, so that the width of the head and the tail of the intermediate blank is also smaller than that of the middle section on a chilled coil inheriting the width of the intermediate blank, and the extrusion of a convection plate in a furnace on the chilled coil does not lead the chilled coil to generate edge covering in the annealing process of a bell-type furnace, so that the process of manually cutting off the edge covering is avoided at low cost, and the yield and the production efficiency of a cold-rolled product are improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required to be used in the embodiments of the present application will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic flow chart of a method for manufacturing a cold rolled product according to an embodiment of the present application;
FIG. 2 is a schematic flow chart of a method of manufacturing a cold rolled product according to another embodiment of the present application;
fig. 3 is a schematic flow chart of a method for manufacturing a cold-rolled product according to another embodiment of the present application.
Detailed Description
Features of various aspects and exemplary embodiments of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are intended to be illustrative only and are not intended to be limiting. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising 8230; \8230;" comprise 8230; "do not exclude the presence of additional identical elements in any process, method, article, or apparatus that comprises the element.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The embodiments will be described in detail below with reference to the accompanying drawings.
In the process of steel smelting, raw materials for steel smelting are smelted into a plate blank material, and then the plate blank material is subjected to rough rolling and finish rolling to obtain a hot rolled coil with the thickness, width, surface quality, plate shape and the like meeting product standards. The hot-rolled coil is conveyed into a cold continuous rolling unit, the scale on the surface of the hot-rolled coil is removed in an acid pickling cold continuous rolling mode, so that the thicker hot-rolled coil is rolled into a thinner cold hard coil, the cold hard coil also needs annealing, and the work hardening of the cold hard coil generated by the cold continuous rolling is eliminated through the annealing.
The bell-type furnace annealing is a common annealing mode in domestic cold-rolled sheet mills at present. The conventional bell-type furnace annealing mainly comprises the steps of turning a vertical chilled coil into a horizontal state through a tilting machine, putting the horizontal chilled coil into the bell-type furnace through a vertical clamp, and annealing the chilled coil in the bell-type furnace by separating the chilled coil by a convection plate in the furnace.
However, during the above-mentioned bell-type annealing process, the inner ring and the outer ring of the chilled coil are often stuck together by the extrusion of the convection plate of the bell-type furnace, thereby producing a binding at the edges of the chilled coil, especially the edges of the head and tail of the chilled coil. The edge covering affects the quality of the final steel coil, so that the edge covering part needs to be manually cut off before the next processing of annealing. And the manual removal of the covered edge not only increases the labor cost of production, influences the production efficiency of steel coil production, but also reduces the utilization rate of the steel coil raw material.
After discovering that the cold-hard coil generates the edge coverage in the process of the bell-type furnace annealing, the inventor of the present application further discovers that the reason of the edge coverage is that the head and the tail of the cold-hard coil are too wide. Therefore, in order to solve the above technical problems, the present application creatively proposes that, in the rough rolling process in the steel coil manufacturing process, the width of the intermediate blank is adjusted by adjusting the rough rolling parameters, the widths of the head and the tail of the intermediate blank are controlled to be appropriately narrowed, and the widths of the head and the tail of the chilled coil are also narrowed because the chilled coil inherits the width of the intermediate blank, so that the problem of edge covering caused by extrusion of the flow plate in the bell type furnace when the chilled coil is subjected to bell type furnace annealing can be solved.
Specifically, in order to solve the problems of the prior art, the embodiments of the present application provide a method for manufacturing a high-efficiency cold-rolled product. The following describes a method for manufacturing a cold rolled product provided in an embodiment of the present application.
Fig. 1 shows a schematic flow chart of a method for manufacturing a cold-rolled product according to an embodiment of the present application. The method comprises the following steps:
s110, roughly rolling the provided plate blank according to the first head and tail short stroke value, and controlling the roughly rolling vertical roll to extrude the head and the tail of the plate blank to be larger than the middle section of the plate blank according to the first head and tail short stroke value of the roughly rolling vertical roll in the roughly rolling process so as to obtain an intermediate blank meeting the preset size specification; the preset size specification is that the widths of the head and the tail of the intermediate blank are smaller than the width of the middle section.
In this embodiment, the slab is rough-rolled by a rough rolling machine, the rough rolling machine at least comprises two rough-rolling vertical rolls, the two rough-rolling vertical rolls are respectively installed on two sides of the strip, and when the slab passes through a roll gap between the two rough-rolling vertical rolls, the rough-rolling vertical rolls can extrude the slab, so as to control the width of the slab. Therefore, the width of the slab is determined by the position of the roughing stand rolls and the width of the roll gap.
The position of the rough rolling vertical roll and the width of the roll gap are determined by a preset reference value and a head-tail short stroke value, the preset reference value is the position of the rough rolling vertical roll and the width of the roll gap defined by a secondary control (L2) system of a rough rolling machine in a default mode, the head-tail short stroke value is set by a user for adjusting the width of the roll gap and compensating the widths of the head part and the tail part of the blank, namely the width of the roll gap is narrowed or widened on the basis of the reference value, and the first head-tail short stroke value is one embodiment of the head-tail short stroke value in the application.
In this embodiment, when different positions of the slab are pressed through the roughing stand rolls during the roughing of the slab, the roll gap of the roughing stand rolls changes with the change in the position of the slab. Due to the existence of the first head and tail short stroke value, when the head and the tail of the plate blank are extruded, the roll gap of the two rough rolling vertical rolls is narrower than the roll gap when the middle section of the plate blank is extruded, so that the extrusion degree of the rough rolling vertical rolls to the head and the tail of the plate blank is greater than the extrusion degree of the middle section of the plate blank, the middle blank made of the plate blank meets the preset dimension specification, and the middle blank with the head and the tail of which the widths are smaller than the width of the middle section is obtained.
S120, finish rolling the intermediate blank to obtain a hot rolled coil, and sequentially carrying out acid pickling cold continuous rolling, bell-type furnace annealing, leveling by a leveling machine, finishing split coil or plate cutting on the hot rolled coil to obtain a cold rolled product.
In this embodiment, after the slab is rough-rolled to obtain the intermediate slab meeting the predetermined dimension specification, the intermediate slab may be finish-rolled to obtain a hot-rolled coil, and the hot-rolled coil is subjected to acid pickling cold continuous rolling, bell-type furnace annealing, temper rolling, finishing splitting or plate cutting to obtain a cold-rolled product, where the cold-rolled product may be a cold-rolled steel sheet or a cold-rolled steel coil.
Taking a cold-rolled product as an example of a cold-rolled steel coil, finish rolling can further roll a relatively thick intermediate blank into a relatively thin hot-rolled coil, and each position of the hot-rolled coil inherits the width of the corresponding position of the intermediate blank. And then, carrying out acid pickling cold continuous rolling on the hot-rolled coil, wherein the acid pickling cold continuous rolling can remove iron scales on the surface of the hot-rolled coil and change the hot-rolled coil into a thinner chilled coil, the acid pickling cold continuous rolling can inherit the width of each position of the hot-rolled coil, and then the chilled coil is placed into a bell-type furnace for annealing to obtain a cover uncoiling.
And further eliminating a yield platform of the cover uncoiling through a flattening process, and splitting the flattened coil again in a finishing splitting process to obtain the cold-rolled steel coil meeting the requirements.
The width of the head and the tail of the intermediate blank is controlled to be smaller than the width of the middle section in the rough rolling process only by optimizing the head and tail short stroke values, so that the width of the head and the tail of the intermediate blank is smaller than the width of the middle section in succession, and the width of the head and the tail of the intermediate blank is also smaller than the width of the middle section, so that the chilled coil is in the annealing process of a cover type furnace, the chilled coil is not wrapped by the convection plate in the furnace due to extrusion of the chilled coil, the manual cutting of the wrapped edge process is avoided at a low cost, and the yield and the production efficiency of a cold-rolled product are improved.
As an alternative embodiment, the first head-to-tail short stroke value ranges from-11 to 8 millimeters.
In this embodiment, the first head-to-tail short stroke value refers to a value in which the roll gap is controlled to be increased on the basis of a reference value defined by default in the system by adjusting the roughing stand rolls, and is also a value in which the width of the intermediate slab is increased on the basis of a set value defined by default.
That is, if the first head-to-tail short stroke value is 8 mm, it means that the width of the intermediate billet is 8 mm wide on the basis of the set value; if the first head-to-tail short stroke value is-11 mm, it means that the width of the intermediate billet is 11 mm narrower on the basis of the set value.
As an alternative embodiment, referring to fig. 3, in order to avoid the generation of the covered edge for each steel coil, before the step S110, the method may further include:
and S310, setting a first head and tail short stroke value of the rough rolling vertical roll aiming at a plurality of target positions of the head and the tail of the plate blank under the condition that the target positions are in different thickness sections.
In this embodiment, for a plurality of target positions of the head and the tail of the slab, a first head-tail short stroke value of a group of rough rolling vertical rolls is set at each target position, and each group of head-tail short stroke values can represent first head-tail short stroke values corresponding to a thickness interval when one target position is in different thickness intervals.
Due to different thicknesses of the plate blanks, the thicknesses of the cold hard rolls manufactured by the plate blanks are different, and the probability of edge covering of the cold hard rolls with different thicknesses is different in the process of annealing in the bell-type furnace. Therefore, even if the same target position on the slab is used, the thickness sections of the slab are different, which causes the set first head and tail short stroke value to be different.
Different first head and tail short stroke values are respectively arranged in different thickness intervals on a plurality of target positions, so that the steel coil with each thickness can be just prevented from being covered, the production efficiency of the steel coil is improved, and the production quality of the steel coil cannot be influenced.
As an alternative embodiment, the first head-tail short stroke value includes a first head-short stroke value, in a case where the target position is on a first edge, the first head-short stroke value ranges from-5 mm to 3 mm, and the first edge is an edge of the head of the slab, which is far away from the tail;
and under the condition that the distance between the target position and the first side is a preset distance, the range of the first head short stroke value is 2-8 mm.
In this embodiment, the first head-tail short stroke value comprises a first head short stroke value that may be used to adjust the position of the roughing stand rolls and the width of the roll gap based on the reference value as the head of the slab passes through the roll gap. That is, the first head short stroke value is a value at which the roll gap is controlled to be increased based on a reference value defined by default in the system when the head of the slab passes through the roll gap.
The head of the plate blank comprises a plurality of target positions, and the short stroke values of the first head corresponding to different target positions are different; even at the same target position, the first head short stroke value differs when the target position is in different thickness sections. In an embodiment, the thicker the same target position, the larger the first head short stroke value.
For example, in the case where the target position is on the first side, the first head short stroke value ranges from-5 to 3 mm, further, when the thickness of the target position on the first side is less than 70 mm, the first head short stroke value is-5 mm, when the thickness of the target position on the first side is greater than 70 mm and less than or equal to 110 mm, the first head short stroke value is-3 mm, when the thickness of the target position on the first side is greater than 110 mm and less than or equal to 210 mm, the first head short stroke value is 0, when the thickness of the target position on the first side is greater than 210 mm, the first head short stroke value is 3 mm, in the case where the distance of the target position from the first side is a preset distance, the first head short stroke value ranges from 2 to 8 mm, the preset distance may be 0.3 m, and specific first head short stroke values are shown in table 1 below.
TABLE 1
As an alternative embodiment, the first head-tail short stroke value includes a first tail short stroke value, and in the case that the target position is on a second side, the tail short stroke value ranges from-11 mm to-5 mm, and the second side is the side of the tail of the slab away from the head;
and under the condition that the distance between the target position and the first edge is a preset distance, the range of the first tail short stroke value is-4-0 mm.
In this embodiment, the first head-tail short stroke value comprises a first tail short stroke value, which may be used to adjust the position of the roughing stand rolls and the width of the roll gap based on the reference value when the tail of the slab passes through the roll gap. Namely, the first tail short stroke value is a value which controls the roll gap to increase on the basis of a reference value defined by default by a system when the tail of the plate blank passes through the roll gap.
The tail part of the plate blank comprises a plurality of target positions, and the first tail part short stroke values corresponding to different target positions are different; even at the same target position, the first tail short stroke value is different when the target position is in different thickness sections. In one embodiment, the thicker the same target location, the larger the first tail short stroke value.
For example, in the case that the target position is on the second side, the first tail short stroke value ranges from-11 mm to-5 mm, further, when the thickness of the target position on the second side is less than 70 mm, the first tail short stroke value ranges from-11 mm, when the thickness of the target position on the second side is greater than 70 mm and less than or equal to 110 mm, the first tail short stroke value ranges from-6 mm, when the thickness of the target position on the second side is greater than 110 mm and less than or equal to 210 mm, when the thickness of the target position on the second side is greater than 210 mm, the first tail short stroke value ranges from-5 mm, in the case that the target position is a preset distance from the second side, the first tail short stroke value ranges from-4 mm to 0 mm, the preset distance may be 0.3 m, and the specific first tail short stroke value is shown in table 2 below.
TABLE 2
As an alternative embodiment, referring to fig. 3, in order to determine the production process and the production parameters of the slab, before S110, the method may further include:
adjusting the original plate blank mark of the plate blank into a plate blank mark;
and determining whether to perform rough rolling on the provided slab according to the first head and tail short stroke value according to the slab mark.
In the embodiment, each slab has a corresponding brand, and the brand can be used for representing identity information of the slab and a process production flow required to be performed next. The original plate blank mark is the mark of the plate blank preset by a machine, and a user can adjust the original plate blank mark to the plate blank mark according to the specific components of the plate blank, the requirements of the user and other reasons, so that the production process flow and the process parameters of the plate blank are changed. For example, the rough rolling vertical rolls can read whether the slab is roughly rolled according to the first head-tail short stroke value according to the adjustment condition of the slab mark.
In one embodiment, the slab may be produced as a hot rolled commodity coil, a hood de-superheated rolled substrate, and a galvanized hot rolled substrate; because only the cover annealed substrate needs to be annealed by the cover annealing furnace, the risk of forming edge covering is high, and therefore in the rough rolling process, the cover annealed substrate corresponds to a first head-tail short stroke value, and the hot rolled commodity coil and the galvanized hot rolled substrate correspond to a second head-tail short stroke value. And under the condition that the target positions are the same and the thickness intervals of the target positions are the same, the second head-tail short stroke value is larger than or equal to the first head-tail short stroke value.
For example, the original slab mark indicates that the slab is produced as a hot rolled commodity coil, and the user finds that the components of the slab are more suitable for making a cover-annealed substrate, the user adjusts the original slab mark to the slab mark, and the adjusted slab mark represents that the production direction of the slab is the cover-annealed substrate. The rough rolling machine reads the first head and tail short stroke value based on the adjusted slab designation and performs rough rolling on the slab based on the first head and tail short stroke value.
Therefore, through the adjustment of the marks, the most suitable production process and production parameters can be conveniently and quickly distributed to each plate blank, and the production risks such as edge covering are avoided.
As is clear to those skilled in the art, for convenience and simplicity of description, the specific working process described above may refer to the corresponding process in the foregoing method embodiment, and details are not repeated herein. It should be understood that the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the present application, and these modifications or substitutions should be covered within the scope of the present application.
Claims (6)
1. A method of manufacturing a high efficiency cold rolled product, the method comprising:
roughly rolling the provided plate blank according to the first head-tail short stroke value, and controlling the extrusion degree of the roughly rolling vertical roll to the head and the tail of the plate blank to be larger than the extrusion degree to the middle section of the plate blank according to the first head-tail short stroke value of the roughly rolling vertical roll in the rough rolling process so as to obtain an intermediate blank meeting the preset dimension specification; the preset size specification is that the widths of the head part and the tail part of the intermediate blank are smaller than the width of the middle section;
and (3) carrying out finish rolling on the intermediate blank to obtain a hot rolled coil, and carrying out acid pickling cold continuous rolling, bell-type furnace annealing, leveling by a leveling machine, finishing split coil or plate cutting on the hot rolled coil in sequence to obtain a cold rolled product.
2. The manufacturing method of a cold rolled product according to claim 1, wherein the first head and tail short stroke value is in a range of-11 to 8 mm.
3. The manufacturing method of a cold rolled product according to claim 1, wherein before the rough rolling of the provided slab according to the first head-tail short stroke value, the method further comprises:
and setting a first head and tail short stroke value of the rough rolling vertical roll aiming at a plurality of target positions of the head and the tail of the plate blank under the condition that the target positions are in different thickness sections.
4. The cold rolled product manufacturing method according to claim 3, wherein the first head-to-tail short stroke value includes a first head short stroke value ranging from-5 to 3 mm in a case where the target position is on a first side which is a side of the head of the slab away from the tail;
and under the condition that the distance between the target position and the first side is a preset distance, the range of the first head short stroke value is 2-8 mm.
5. A cold rolled product manufacturing method according to claim 3, wherein said first head and tail short stroke value includes a first tail short stroke value ranging from-11 to-5 mm in a case where said target position is on a second side which is an edge of the tail of said slab away from said head;
and under the condition that the distance between the target position and the first edge is a preset distance, the range of the first tail short stroke value is-4-0 mm.
6. The cold rolled product manufacturing method according to claim 1, wherein before the rough rolling of the supplied slab according to the first head and tail short stroke value, the method further comprises:
adjusting the original plate blank mark of the plate blank into a plate blank mark;
and determining whether to perform rough rolling on the provided slab according to the first head and tail short stroke value according to the slab mark.
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