CN111349778B - Method and device for controlling charging distance of plate blank - Google Patents

Method and device for controlling charging distance of plate blank Download PDF

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Publication number
CN111349778B
CN111349778B CN202010202877.4A CN202010202877A CN111349778B CN 111349778 B CN111349778 B CN 111349778B CN 202010202877 A CN202010202877 A CN 202010202877A CN 111349778 B CN111349778 B CN 111349778B
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slab
width
tail
distance
modulated
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CN111349778A (en
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黄爽
郑伟
王健健
艾矫健
王晓东
周德光
周政
杨孝鹤
彭振伟
徐海卫
魏志军
王金华
***
王婷
王雪青
王君
张�杰
陈克钦
童燕成
刘靖群
吴秀鹏
王文广
徐芳
夏银锋
胡亮
高月
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Shougang Jingtang United Iron and Steel Co Ltd
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Shougang Jingtang United Iron and Steel Co Ltd
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    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D11/00Process control or regulation for heat treatments
    • CCHEMISTRY; METALLURGY
    • C21METALLURGY OF IRON
    • C21DMODIFYING 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
    • C21D9/00Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/70Furnaces for ingots, i.e. soaking pits

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Abstract

The embodiment of the invention provides a method and a device for controlling a slab charging interval, wherein the method comprises the following steps: aiming at the current block slab, acquiring the preset width of the slab, and adjusting the width of the slab, the head width of the slab and the tail width of the slab; judging whether the slab is a width-modulated slab according to the width-modulated slab identifier, and if the slab is determined to be the width-modulated slab, comparing the head width and the tail width of the slab to obtain the maximum width value between the head width and the tail width; modifying the preset width of the plate blank according to the maximum width value; determining the charging distance of the plate blank based on the modified preset width, the thickness of the plate blank and the steel type of the plate blank; thus, when the slab is a width-adjusted slab, the width of the wider end is taken as a preset width, and the charging interval of the slab is determined according to the modified preset width and thickness and the steel type; therefore, the charging distance is completely determined according to the actual maximum width of the plate blank, so that the phenomenon that two adjacent plate blanks are close together and even overlapped can be avoided, and the steel burning quality is ensured.

Description

Method and device for controlling charging distance of plate blank
Technical Field
The invention belongs to the technical field of hot rolling, and particularly relates to a method and a device for controlling a charging interval of a slab.
Background
In the continuous casting of slabs in steelmaking, when the slab width of one casting pass is changed, a widened slab (or referred to as an intermediate slab) occurs. The width difference between the head width and the tail width of the width-adjusting blank is a certain width difference, and the width difference is generally more than 50 mm. When the width adjustment amount is large, the width difference can even reach more than 100 mm. Since there are two cases of narrowing by narrowing and narrowing by widening, there are two cases where the head width is larger than the tail width and the tail width is larger than the head width.
In the heating furnace process of hot rolling production, a slab needs to be loaded into a heating furnace for heating. Because of the heating furnace can heat polylith slab simultaneously, polylith slab is parallel to be placed, if when being transferred wide base to the slab, appear two adjacent slabs very easily and closely together, can take place the problem that the part stacked even, influence the quality of burning steel, the production accident appears even.
Disclosure of Invention
Aiming at the problems in the prior art, the embodiment of the invention provides a method and a device for controlling the charging interval of slabs, which are used for solving the technical problem that when the slabs are width-adjusted slabs, two adjacent slabs are close together and even partially stacked, so that the quality of steel burning is influenced.
The invention provides a method for controlling a slab charging interval, which comprises the following steps:
aiming at a current block slab, acquiring a preset width of the slab, a width-adjusting slab identifier, a head width of the slab and a tail width of the slab;
judging whether the slab is a width-modulated slab according to the width-modulated slab identifier, and if the slab is determined to be the width-modulated slab, comparing the head width and the tail width of the slab to obtain the maximum width value between the head width and the tail width; modifying the preset width of the plate blank according to the maximum width value;
and determining the charging interval of the slab based on the modified preset width, the thickness of the slab and the steel grade of the slab.
Optionally, the determining, according to the width-modulated slab identifier, whether the slab is a width-modulated slab includes:
judging whether the width-modulated slab identifier is consistent with a preset first identifier or not, and if so, determining that the slab is the width-modulated slab; the first mark is used for marking the slab as a width-adjustable slab.
Optionally, after determining the charging distance of the slab based on the modified predetermined width, the thickness of the slab and the steel grade to which the slab belongs, the method further includes:
acquiring the stroke of a walking beam in the heating furnace, the stepping cycle times of the walking beam and the modified preset width;
determining the distance between the tail of the plate blank and the tail of the fixed beam in the heating furnace according to the stroke of the walking beam, the stepping cycle times of the walking beam and the modified preset width;
and determining the steel loading stroke of the steel loading machine according to the distance between the tail of the plate blank and the tail of the fixed beam in the heating furnace.
Optionally, the determining the distance between the tail of the slab and the tail of the fixed beam in the heating furnace according to the stroke of the walking beam, the number of stepping cycles of the walking beam, and the modified predetermined width includes:
according to formula Xm=A×n+Xm-1-Bm-50 determining the distance between the tail of the slab and the tail of the fixed beam inside the furnace; wherein, X ismThe distance between the tail of the current block slab and the tail of the fixed beam in the heating furnace is shown, A is the stroke of the walking beam, n is the stepping cycle number of the walking beam, and X ism-1The distance between the last slab of the current slab and the tail part of the fixed beam in the heating furnace,b ismThe modified predetermined width of the current slab.
The invention also provides a device for controlling the charging distance of the plate blank, which comprises:
the acquisition unit is used for acquiring the preset width of the slab, the width-adjusting slab identifier, the head width of the slab and the tail width of the slab for the current block slab;
the judging unit is used for judging whether the slab is the width-modulated slab or not according to the width-modulated slab identifier, and if the slab is determined to be the width-modulated slab, comparing the head width and the tail width of the slab to obtain the maximum width value between the head width and the tail width; modifying the preset width of the plate blank according to the maximum width value;
and the determining unit is used for determining the charging interval of the slab based on the modified preset width, the thickness of the slab and the steel grade to which the slab belongs.
Optionally, the determining unit is specifically configured to:
judging whether the width-modulated slab identifier is consistent with a preset first identifier or not, and if so, determining that the slab is the width-modulated slab; the first mark is used for marking the slab as a width-adjustable slab.
Optionally, the determining unit is specifically configured to:
acquiring the stroke of a walking beam in the heating furnace, the stepping cycle times of the walking beam and the modified preset width;
determining the distance between the tail of the plate blank and the tail of the fixed beam in the heating furnace according to the stroke of the walking beam, the stepping cycle times of the walking beam and the modified preset width;
and determining the steel loading stroke of the steel loading machine according to the distance between the tail of the plate blank and the tail of the fixed beam in the heating furnace.
Optionally, the determining unit is further specifically configured to:
according to formula Xm=A×n+Xm-1-Bm-50 determining the distance between the tail of the slab and the tail of the fixed beam inside the furnace; wherein the content of the first and second substances,said XmThe distance between the tail of the current block slab and the tail of the fixed beam in the heating furnace is shown, A is the stroke of the walking beam, n is the stepping cycle number of the walking beam, and X ism-1The distance between the last slab of the current slab and the tail part of the fixed beam in the heating furnace is BmThe modified predetermined width of the current slab.
The embodiment of the invention provides a method and a device for controlling a slab charging interval, wherein the method comprises the following steps: aiming at a current block slab, acquiring a preset width of the slab, a width-adjusting slab identifier, a head width of the slab and a tail width of the slab; judging whether the slab is a width-modulated slab according to the width-modulated slab identifier, and if the slab is determined to be the width-modulated slab, comparing the head width and the tail width of the slab to obtain the maximum width value between the head width and the tail width; modifying the preset width of the plate blank according to the maximum width value; determining the charging distance of the slab based on the modified preset width, the thickness of the slab and the steel grade of the slab; thus, when the slab is a width-adjusted slab, the width of the wider end is taken as a preset width, and then the charging interval of the slab is determined according to the modified preset width and thickness and the steel type; therefore, the charging distance is completely determined according to the actual maximum width of the plate blank, so that the phenomenon that two adjacent plate blanks are close together and even overlapped can be avoided, and the steel burning quality is ensured.
Drawings
FIG. 1 is a schematic flow chart of a method for controlling a charging distance of slabs according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a device for controlling a charging distance of a slab according to an embodiment of the present invention.
Detailed Description
In order to solve the technical problem that when the plate blanks are width-adjusted blanks in the prior art, two adjacent plate blanks are close to each other, even the two adjacent plate blanks are partially stacked, and further the quality of steel burning is influenced, the invention provides a method and a device for controlling the charging distance of the plate blanks, wherein the method comprises the following steps: aiming at a current block slab, acquiring a preset width of the slab, a width-adjusting slab identifier, a head width of the slab and a tail width of the slab; judging whether the slab is a width-modulated slab according to the width-modulated slab identifier, and if the slab is determined to be the width-modulated slab, comparing the head width and the tail width of the slab to obtain the maximum width value between the head width and the tail width; modifying the preset width of the plate blank according to the maximum width value; and determining the charging interval of the slab based on the modified preset width, the thickness of the slab and the steel grade of the slab.
The technical solution of the present invention is further described in detail by the accompanying drawings and the specific embodiments.
Example one
The embodiment provides a method for controlling a charging distance of a slab, which comprises the following steps of:
s110, aiming at the current block slab, obtaining the preset width of the slab, widening the slab identification, the head width of the slab and the tail width of the slab;
in the hot rolling steelmaking process, the third-level system may want the second-level system of the heating furnace to issue relevant steelmaking parameters PDI, which may include: the method comprises the following steps of presetting the width of a slab, widening slab identification, the head width of the slab and the tail width of the slab.
Then, for the current slab, before heating the current slab, the predetermined width of the slab, the head width of the slab, and the tail width of the slab may be obtained.
S111, judging whether the slab is a width-modulated slab or not according to the width-modulated slab identifier, and if the slab is determined to be the width-modulated slab, comparing the head width and the tail width of the slab to obtain the maximum width value between the head width and the tail width; modifying the preset width of the plate blank according to the maximum width value;
after the width-modulated slab identification of the slab is obtained, judging whether the slab is the width-modulated slab according to the width-modulated slab identification, if the slab is determined to be the width-modulated slab, comparing the head width and the tail width of the slab, and obtaining the maximum width value between the head width and the tail width; modifying the predetermined width of the slab according to the maximum width value.
Here, specifically, Max (B) is obtained by using the formula Bh,Bt) Comparing the head width and the tail width of the plate blank to obtain the maximum width value between the head width and the tail width; wherein, BhWidth of head of slab, BtThe width of the tail part of the slab.
As an optional embodiment, the determining whether the slab is a width-modulated slab according to the width-modulated slab identifier includes:
judging whether the width-modulated slab identifier is consistent with a preset first identifier or not, and if so, determining that the slab is the width-modulated slab; the first mark is used for marking the slab as a width-adjustable slab. For example the first identifier may be 1.
And S112, determining the charging interval of the slab based on the modified preset width, the thickness of the slab and the steel grade of the slab.
And after the preset width is modified, determining the charging distance of the slab based on the modified preset width, the thickness of the slab and the steel grade to which the slab belongs.
Specifically, the modified preset width, the thickness of the slab and the steel type to which the slab belongs are substituted into a preset charging interval calculation function, and the charging interval of the slab is determined. Thus, the determined width is the maximum width of the slab, so that the finally calculated charging interval does not cause the situation that the current slab is close to or even overlapped with the adjacent slab.
Further, after the charging distance is determined, the steel charging stroke of the steel charging machine needs to be determined,
after determining the charging distance of the slab based on the modified preset width, the thickness of the slab and the steel grade to which the slab belongs, the method further comprises the following steps:
acquiring the stroke of a walking beam in the heating furnace, the stepping cycle times of the walking beam and the modified preset width;
determining the distance between the tail of the plate blank and the tail of the fixed beam in the heating furnace according to the stroke of the walking beam, the stepping cycle times of the walking beam and the modified preset width; the walking beam is used for conveying the slab from the inlet of the heating furnace to the outlet of the heating furnace;
and determining the steel loading stroke of the steel loading machine according to the distance between the tail of the plate blank and the tail of the fixed beam in the heating furnace. The charging stroke is used for charging the slab into the heating furnace at a predetermined heating position.
Specifically, the determining the distance between the tail of the slab and the tail of the fixed beam in the heating furnace according to the stroke of the walking beam, the number of stepping cycles of the walking beam and the modified preset width includes:
according to formula Xm=A×n+Xm-1-Bm-50 determining the distance between the tail of the slab and the tail of the fixed beam inside the furnace; wherein, X ismThe distance between the tail of the current block slab and the tail of the fixed beam in the heating furnace is shown, A is the stroke of the walking beam, n is the stepping cycle number of the walking beam, and X ism-1The distance between the last slab of the current slab and the tail part of the fixed beam in the heating furnace is BmThe modified predetermined width of the current slab.
After the distance between the tail of the slab and the tail of the fixed beam in the heating furnace is determined, the distance can be substituted into a steel charging stroke calculation function to determine the steel charging stroke.
And after the steel charging stroke and the furnace charging distance are calculated, automatically charging steel according to the steel charging stroke and the furnace charging distance.
Based on the same inventive concept, the invention also provides a device for controlling the charging distance of the plate blank, which is described in the second embodiment.
Example two
The present embodiment provides a device for controlling a charging distance of a slab, as shown in fig. 2, the device includes: an acquisition unit 21, a judgment unit 22, and a determination unit 23; wherein the content of the first and second substances,
in the hot rolling steelmaking process, the third-level system may want the second-level system of the heating furnace to issue relevant steelmaking parameters PDI, which may include: the method comprises the following steps of presetting the width of a slab, widening slab identification, the head width of the slab and the tail width of the slab.
Then, for the current slab, before heating the current slab, the obtaining unit 21 may obtain the predetermined width of the slab, the width-adjusted slab identifier, the head width of the slab, and the tail width of the slab.
After the width-modulated slab identifier of the slab is obtained, the judging unit 22 is configured to judge whether the slab is a width-modulated slab according to the width-modulated slab identifier, and if it is determined that the slab is a width-modulated slab, compare the head width and the tail width of the slab to obtain a maximum width value therebetween; modifying the predetermined width of the slab according to the maximum width value.
Here, the judgment unit 22 specifically uses the formula B ═ Max (B)h,Bt) Comparing the head width and the tail width of the plate blank to obtain the maximum width value between the head width and the tail width; wherein, BhWidth of head of slab, BtThe width of the tail part of the slab.
As an alternative embodiment, the determining unit 22 determines whether the slab is a width-modulated slab according to the width-modulated slab identifier, including:
judging whether the width-modulated slab identifier is consistent with a preset first identifier or not, and if so, determining that the slab is the width-modulated slab; the first mark is used for marking the slab as a width-adjustable slab. For example the first identifier may be 1.
After the predetermined width is modified, the determining unit 23 is used for determining the charging distance of the slab based on the modified predetermined width, the thickness of the slab and the steel grade to which the slab belongs.
Specifically, the determining unit 23 is configured to substitute the modified predetermined width, the thickness of the slab, and the steel type to which the slab belongs into a preset charging interval calculation function to determine the charging interval of the slab. Thus, the determined width is the maximum width of the slab, so that the finally calculated charging interval does not cause the situation that the current slab is close to or even overlapped with the adjacent slab.
Further, after the charging distance is determined, the steel charging stroke of the steel charging machine needs to be determined,
after determining the charging distance of the slab based on the modified predetermined width, the thickness of the slab and the steel grade to which the slab belongs, the determining unit 23 is further configured to:
acquiring the stroke of a walking beam in the heating furnace, the stepping cycle times of the walking beam and the modified preset width;
determining the distance between the tail of the plate blank and the tail of the fixed beam in the heating furnace according to the stroke of the walking beam, the stepping cycle times of the walking beam and the modified preset width; the walking beam is used for conveying the slab from the inlet of the heating furnace to the outlet of the heating furnace;
and determining the steel loading stroke of the steel loading machine according to the distance between the tail of the plate blank and the tail of the fixed beam in the heating furnace. The charging stroke is used for charging the slab into the heating furnace at a predetermined heating position.
Specifically, the determining unit 23 determines the distance between the tail of the slab and the tail of the fixed beam in the heating furnace according to the stroke of the walking beam, the number of stepping cycles of the walking beam, and the modified predetermined width, and includes:
according to formula Xm=A×n+Xm-1-Bm-50 determining the distance between the tail of the slab and the tail of the fixed beam inside the furnace; wherein, X ismThe distance between the tail of the current block slab and the tail of the fixed beam in the heating furnace is shown, A is the stroke of the walking beam, n is the stepping cycle number of the walking beam, and X ism-1The distance between the last slab of the current slab and the tail part of the fixed beam in the heating furnace is BmThe modified predetermined width of the current slab.
After the distance between the tail of the slab and the tail of the fixed beam in the heating furnace is determined, the distance can be substituted into a steel charging stroke calculation function to determine the steel charging stroke.
And after the steel charging stroke and the furnace charging distance are calculated, automatically charging steel according to the steel charging stroke and the furnace charging distance.
EXAMPLE III
In practical application, when the method provided by the first embodiment and the device provided by the second embodiment are used for controlling the charging distance of slabs in a hot rolling line of a certain steel mill 2250, the specific embodiments are as follows:
before heating the current slab, acquiring the preset width of the slab, widening the slab identification, the head width of the slab and the tail width of the slab. Wherein the preset width is 1400mm, the width-adjusting slab mark is 1, the head width is 1400mm, and the tail width of the slab is 1500 mm. Thus modifying 1500mm to the predetermined width of the slab.
And then substituting the modified preset width, the thickness of the slab and the steel type to which the slab belongs into a preset charging interval calculation function to determine the charging interval of the slab.
And calculating the distance between the tail of the plate blank and the tail of the fixed beam in the heating furnace according to the stroke of the walking beam, the stepping cycle times of the walking beam and the modified preset width, and calculating the steel loading stroke of the plate blank according to the distance between the tail of the plate blank and the tail of the fixed beam in the heating furnace.
And automatically charging steel based on the steel charging stroke and the furnace charging distance.
The method and the device for controlling the charging distance of the slab, provided by the embodiment of the invention, have the beneficial effects that at least:
the embodiment of the invention provides a method and a device for controlling a slab charging interval, wherein the method comprises the following steps: aiming at a current block slab, acquiring a preset width of the slab, a width-adjusting slab identifier, a head width of the slab and a tail width of the slab; judging whether the slab is a width-modulated slab according to the width-modulated slab identifier, and if the slab is determined to be the width-modulated slab, comparing the head width and the tail width of the slab to obtain the maximum width value between the head width and the tail width; modifying the preset width of the plate blank according to the maximum width value; determining the charging distance of the slab based on the modified preset width, the thickness of the slab and the steel grade of the slab; thus, when the slab is a width-adjusted slab, the width of the wider end is taken as a preset width, and then the charging interval of the slab is determined according to the modified preset width and thickness and the steel type; therefore, the charging distance is determined according to the actual maximum width of the plate blanks, so that the phenomenon that two adjacent plate blanks are close together or even overlapped can be avoided, the steel burning quality is ensured, and the steel burning accident is avoided.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.

Claims (4)

1. A method for controlling the charging distance of a plate blank is characterized by comprising the following steps:
aiming at a current block slab, acquiring a preset width of the slab, a width-adjusting slab identifier, a head width of the slab and a tail width of the slab;
judging whether the slab is a width-modulated slab according to the width-modulated slab identifier, and if the slab is determined to be the width-modulated slab, comparing the head width and the tail width of the slab to obtain the maximum width value between the head width and the tail width; modifying the preset width of the plate blank according to the maximum width value;
determining the charging distance of the slab based on the modified preset width, the thickness of the slab and the steel grade of the slab; wherein the content of the first and second substances,
after determining the charging distance of the slab based on the modified preset width, the thickness of the slab and the steel grade to which the slab belongs, the method further comprises the following steps:
acquiring the stroke of a walking beam in the heating furnace, the stepping cycle times of the walking beam and the modified preset width;
determining the distance between the tail of the plate blank and the tail of the fixed beam in the heating furnace according to the stroke of the walking beam, the stepping cycle times of the walking beam and the modified preset width;
determining the steel loading stroke of the steel loading machine according to the distance between the tail of the plate blank and the tail of the fixed beam in the heating furnace;
the step of determining the distance between the tail of the plate blank and the tail of the fixed beam in the heating furnace according to the stroke of the walking beam, the stepping cycle times of the walking beam and the modified preset width comprises the following steps:
according to formula Xm=A×n+Xm-1-Bm-50 determining the distance between the tail of the slab and the tail of the fixed beam inside the furnace; wherein, X ismThe distance between the tail of the current block slab and the tail of the fixed beam in the heating furnace is shown, A is the stroke of the walking beam, n is the stepping cycle number of the walking beam, and X ism-1The distance between the last slab of the current slab and the tail part of the fixed beam in the heating furnace is BmThe modified predetermined width of the current slab.
2. The method of claim 1, wherein said determining whether the slab is a width modulated slab based on the width modulated slab identifier comprises:
judging whether the width-modulated slab identifier is consistent with a preset first identifier or not, and if so, determining that the slab is the width-modulated slab; the first mark is used for marking the slab as a width-adjustable slab.
3. A device for controlling the charging distance of a slab, which is characterized by comprising:
the acquisition unit is used for acquiring the preset width of the slab, the width-adjusting slab identifier, the head width of the slab and the tail width of the slab for the current block slab;
the judging unit is used for judging whether the slab is the width-modulated slab or not according to the width-modulated slab identifier, and if the slab is determined to be the width-modulated slab, comparing the head width and the tail width of the slab to obtain the maximum width value between the head width and the tail width; modifying the preset width of the plate blank according to the maximum width value;
the determining unit is used for determining the charging interval of the slab based on the modified preset width, the thickness of the slab and the steel grade to which the slab belongs; wherein the content of the first and second substances,
the determining unit is specifically configured to:
acquiring the stroke of a walking beam in the heating furnace, the stepping cycle times of the walking beam and the modified preset width;
determining the distance between the tail of the plate blank and the tail of the fixed beam in the heating furnace according to the stroke of the walking beam, the stepping cycle times of the walking beam and the modified preset width;
determining the steel loading stroke of the steel loading machine according to the distance between the tail of the plate blank and the tail of the fixed beam in the heating furnace;
the determining unit is further specifically configured to:
according to formula Xm=A×n+Xm-1-Bm-50 determining the distance between the tail of the slab and the tail of the fixed beam inside the furnace; wherein, X ismThe distance between the tail of the current block slab and the tail of the fixed beam in the heating furnace is shown, A is the stroke of the walking beam, n is the stepping cycle number of the walking beam, and X ism-1The distance between the last slab of the current slab and the tail part of the fixed beam in the heating furnace is BmThe modified predetermined width of the current slab.
4. The apparatus according to claim 3, wherein the determining unit is specifically configured to:
judging whether the width-modulated slab identifier is consistent with a preset first identifier or not, and if so, determining that the slab is the width-modulated slab; the first mark is used for marking the slab as a width-adjustable slab.
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