CN112241585A - Method and device for estimating local wear of high-speed steel working roller and electronic equipment - Google Patents

Method and device for estimating local wear of high-speed steel working roller and electronic equipment Download PDF

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CN112241585A
CN112241585A CN202010893641.XA CN202010893641A CN112241585A CN 112241585 A CN112241585 A CN 112241585A CN 202010893641 A CN202010893641 A CN 202010893641A CN 112241585 A CN112241585 A CN 112241585A
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strip steel
wear
roll
service
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CN112241585B (en
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王文广
徐芳
李恺
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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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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
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Abstract

The invention discloses a method and a device for estimating local wear of a high-speed steel working roller and electronic equipment, wherein the method comprises the following steps: aiming at target strip steel rolled in a target service period by target position points axially distributed by a working roller, acquiring the length of the target strip steel; acquiring the wear coefficient of the target strip steel to a target position point; acquiring a wear distribution characteristic coefficient of the target strip steel to a target position point; based on the length, the wear coefficient and the wear distribution characteristic coefficient, obtaining the wear amount of the target strip steel rolled by the target position point in the target service period; and obtaining the abrasion loss of the working roll in the axial direction based on the abrasion loss of each strip steel rolled in each service period at each position point on the working roll. The invention solves the problems that in the prior art, due to numerous influence factors of local abrasion of the high-speed steel working roller, the estimation error usually occurs to cause the product plate profile defect to cause quality loss or the roller is abraded in advance to cause the roller consumption cost to be increased.

Description

Method and device for estimating local wear of high-speed steel working roller and electronic equipment
Technical Field
The invention relates to the technical field of steel rolling, in particular to a method and a device for estimating local wear of a high-speed steel working roller and electronic equipment.
Background
Compared with rolls made of common materials, high-speed steel rolls have higher wear resistance and better roll surface quality, so that the high-speed steel rolls are more and more widely applied to working rolls of finish rolling upstream stands (particularly F1-F4 stands) of a hot continuous rolling production line. At present, under normal conditions, a high-speed steel working roll can continuously serve for 3-6 hot rolling periods after being ground once, and in the service process of the hot rolling periods, the roll state of the high-speed steel working roll is evaluated after the high-speed steel working roll finishes one hot rolling period, and the high-speed steel working roll is continuously used after being qualified.
In the actual production process, the abrasion loss of the high-speed steel working roll in the service roll period does not have the condition of long-term grinding machine measurement in consideration of the working efficiency and the production cost, and can be estimated only according to experience. Due to the fact that the local abrasion of the high-speed steel working roll has a plurality of influencing factors, the problems that the quality loss is caused by the product plate profile defect caused by estimation errors or the roll consumption cost is increased due to the fact that the roll is abraded in advance usually occur.
Disclosure of Invention
The embodiment of the application provides a method and a device for estimating local wear of a high-speed steel working roller and electronic equipment, and solves the problem that in the prior art, due to numerous influence factors of the local wear of the high-speed steel working roller, the quality loss caused by the product plate profile defect due to estimation errors or the roller consumption cost increased due to the early wear of the roller can be caused.
In a first aspect, the present application provides the following technical solutions through an embodiment of the present application:
a method for predicting local wear of a high-speed steel working roll is characterized by comprising the following steps: the method comprises the steps of obtaining the length of a target strip steel rolled in a target service period by aiming at target position points axially distributed by a working roller, wherein the target position points are any one of the position points axially distributed by the working roller, the target service period is any one of the service periods of the working roller, and the target strip steel is any one of the strip steels rolled in the target service period by the target position points; acquiring the wear coefficient of the target strip steel to the target position point; acquiring a wear distribution characteristic coefficient of the target strip steel to the target position point; based on the length, the wear coefficient and the wear distribution characteristic coefficient, obtaining the wear amount of the target strip steel rolled by the target position point in the target service period; and obtaining the abrasion loss of the working roll in the axial direction based on the abrasion loss of each strip steel rolled in each service period at each position point on the working roll.
In one embodiment, the obtaining the wear coefficient of the target strip steel to the target position point includes: obtaining the rolling reduction, the unit rolling force along the width direction, the rolling reduction and the outlet thickness of the working roll when the working roll rolls the target strip steel in the target service period, wherein the outlet thickness is the target thickness which needs to be reached after the target strip steel is rolled at the working roll; obtaining the thickness of a finished product of the target strip steel, wherein the thickness of the finished product is the target thickness which needs to be reached after the finish rolling of the target strip steel is completed by a finishing mill; acquiring the roll diameter of the working roll; and obtaining the wear coefficient based on the reduction rate, the unit rolling force, the reduction, the outlet thickness, the finished product thickness and the roll diameter.
In one embodiment, the obtaining the wear coefficient of the target strip steel to the target position point based on the reduction ratio, the unit rolling force, the reduction, the exit thickness, the finished product thickness, and the roll diameter includes: based on the following equation:
Figure BDA0002657744440000021
obtaining the wear coefficient of the target strip steel to the target position point, wherein wi,jWhen the working roll is in service in the ith frame, the jth strip steel has the wear coefficient to the target position point, the ith frame is the frame in which the working roll is in service in the target service roll period, the jth strip steel is the target strip steel rolled by the working roll in the target service roll period, and Ei,jRolling the jth strip steel for the ith stand at a reduction ratio Fi,jA unit rolling force in the width direction, Δ h, for the ith frame when rolling the jth strip steeli,jRolling the jth strip steel for the ith stand by the rolling reduction hi,jRolling said for said ith standOutlet thickness, h, of the jth stripfIs the finished thickness, R, of the target stripiAnd i and j are positive integers, wherein the i and the j are the roll diameter of the working roll.
In one embodiment, the obtaining of the wear distribution characteristic coefficient of the target strip steel to the target position point includes: taking a first end part of the working roller as a zero point and an axial direction of the working roller as a coordinate axis, and acquiring a distribution coordinate x of the target position point on the working roller, wherein the first end part is an operation end or a transmission end of the working roller; when x is equal to 0, Z), deltai,j(x) 0; when x is equal to [ Z, Z + D ∈]When the temperature of the water is higher than the set temperature,
Figure BDA0002657744440000022
when x is formed into (Z + D, Z + B)jwhen-D), δi,j(x) 1 is ═ 1; when x is equal to [ Z + B ]j-D,Z+Bj]When the temperature of the water is higher than the set temperature,
Figure BDA0002657744440000023
when x is equal to [ Z + B ]j,L]When is deltai,j(x) 0, wherein,
Figure BDA0002657744440000024
δi,j(x) The jth strip steel is a frame with a working roll in service in the target service roll period, the jth strip steel is a target strip steel rolled in the target service roll period, D is the length of an edge wear compensation area of the target strip steel, a and B are strip steel edge wear area compensation coefficients, L is the axial length of the working roll, B is the wear distribution characteristic coefficient of the target roll, andjis the width, S, of the jth strip steeli,jAnd the roll shifting value of the ith rack in the process of rolling the jth strip steel is shown, wherein i and j are positive integers.
In one embodiment, the obtaining the wear amount of the target strip steel rolled by the target position point in the target service period based on the length, the wear coefficient and the wear distribution characteristic coefficient includes: based on the following equation: wi,j(x)＝δi,j(x)*wi,j*LENjObtaining the abrasion loss of the target strip steel rolled by the target position point in the target service period, wherein W isi,j(x) When the working roll is in service in the ith frame, the jth strip steel is the wear extent of the target position point, the ith frame is the frame in which the working roll is in service in the target service roll period, and the jth strip steel is the target strip steel rolled by the working roll in the target service roll period, deltai,j(x) The wear distribution characteristic coefficient, LEN, of the jth strip steel to the target position pointjIs the length, w, of the jth strip steeli,jAnd i and j are positive integers, wherein the abrasion coefficient of the jth strip steel to the target position point is shown.
In one embodiment, the obtaining the wear amount of the working rolls in the axial direction based on the wear amount of each strip steel rolled in each service cycle at each position point on the working rolls comprises: based on the following equation:
Figure BDA0002657744440000031
obtaining the abrasion loss of the target position point after serving for each service period, wherein WERA (x) is the abrasion loss of the target position point after serving for M service periods, NkThe total number of the strip steel rolled by the working roll in the kth service cycle,
Figure BDA0002657744440000032
and when the working roll is in service in the ith frame in the kth service cycle, the jth strip steel has the abrasion loss to the target position point.
In a second aspect, the present application provides the following technical solutions according to an embodiment of the present application:
an apparatus for predicting localized wear of a high speed steel work roll, comprising: the first acquisition module is used for acquiring the length of a target strip steel rolled in a target service cycle by aiming at target position points axially distributed on a working roller, wherein the target position points are any one of the position points axially distributed on the working roller, the target service cycle is any one of the service cycles of the working roller, and the target strip steel is any one of the strip steels rolled in the target service cycle by the target position points; the second acquisition module is used for acquiring the wear coefficient of the target strip steel to the target position point; the third acquisition module is used for acquiring the wear distribution characteristic coefficient of the target strip steel to the target position point; the first obtaining module is used for obtaining the abrasion loss of the target strip steel rolled by the target position point in the target service period according to the length, the abrasion coefficient and the abrasion distribution characteristic coefficient; and the second obtaining module is used for obtaining the abrasion loss of the working roll in the axial direction according to the abrasion loss of each strip steel rolled in each service period at each position point on the working roll.
In a third aspect, the present application provides the following technical solutions through an embodiment of the present application:
an electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the processor when executing the program may perform the method steps as described in any of the embodiments above.
In a fourth aspect, the present application provides the following technical solutions according to an embodiment of the present application:
a computer-readable storage medium having stored thereon a computer program comprising: which when executed by a processor may carry out the method steps as described in any of the embodiments above.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:
the method for estimating the local wear of the high-speed steel working roll integrates the length of the target strip steel rolled by the target position point in the target service period, the wear coefficient of the target strip steel to the target position point, and the influence of the wear distribution characteristic coefficient of the target strip steel to the target position point on the wear loss to obtain the wear loss of the target strip steel rolled by the target position point in the target service period, further based on the abrasion loss of each strip steel rolled in each service period at each position point, the abrasion loss of the working roll in the axial direction is obtained, thereby being capable of accurately forecasting the abrasion condition of the working roll after each service period without mounting a grinding machine, the problem that in the prior art, when the local abrasion loss of the working roller of the lower machine is estimated manually, the estimation error usually causes the product plate profile defect to cause quality loss or the roller is abraded in advance to cause the roller consumption cost to be increased is solved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, 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 flowchart of a method for estimating local wear of a high-speed steel work roll according to an embodiment of the present disclosure;
fig. 2 is a comparison diagram of a schematic diagram of a wear distribution curve obtained by estimation and actual measurement of a working roll after the 3 rd operation according to an embodiment of the present application;
fig. 3 is a comparison diagram of a schematic diagram of a wear distribution curve obtained through estimation and actual measurement of the working roll after the working roll is operated for the 6 th time according to the embodiment of the present application;
FIG. 4 is a schematic diagram of an estimation device of local wear of a high-speed steel work roll according to a second embodiment of the present application;
fig. 5 is an architecture diagram of an electronic device according to a third embodiment of the present application;
fig. 6 is an architecture diagram of a computer-readable storage medium according to a fourth embodiment of the present application.
Detailed Description
The embodiment of the application provides a method and a device for estimating local wear of a high-speed steel working roller and electronic equipment, and solves the problem that in the prior art, due to numerous influence factors of the local wear of the high-speed steel working roller, the quality loss caused by the product plate profile defect due to estimation errors or the roller consumption cost increased due to the early wear of the roller can be caused.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
the method for estimating the local wear of the high-speed steel working roll integrates the length of the target strip steel rolled by the target position point in the target service period, the wear coefficient of the target strip steel to the target position point, and the influence of the wear distribution characteristic coefficient of the target strip steel to the target position point on the wear loss to obtain the wear loss of the target strip steel rolled by the target position point in the target service period, further based on the abrasion loss of each strip steel rolled in each service period at each position point, the abrasion loss of the working roll in the axial direction is obtained, thereby being capable of accurately forecasting the abrasion condition of the working roll after each service period without mounting a grinding machine, the problem that in the prior art, when the local abrasion loss of the working roller of the lower machine is estimated manually, the estimation error usually causes the product plate profile defect to cause quality loss or the roller is abraded in advance to cause the roller consumption cost to be increased is solved.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Example one
As shown in fig. 1, the embodiment provides a method for estimating local wear of a high-speed steel work roll, which includes:
step S101: the method comprises the steps of obtaining the length of a target strip steel rolled in a target service period by aiming at target position points axially distributed by a working roll, wherein the target position points are any one of the position points axially distributed by the working roll, the target service period is any one of the service periods of the working roll, and the target strip steel is any one of the strip steels rolled in the target service period by the target position points.
After the high-speed steel working roll is ground for one time, the high-speed steel working roll continuously serves for 3-6 hot rolling periods, the roll state of the high-speed steel working roll is evaluated when the high-speed steel working roll is in service for one hot rolling period, the high-speed steel working roll is continuously used on a machine after the high-speed steel working roll is qualified in evaluation, and the service period in the embodiment refers to the hot rolling period. The working rolls can be used in different frames in different service periods, and a plurality of strip steels can be rolled in the same service period.
The abrasion degree of the working rolls is different when the strip steels with different lengths are rolled, and the embodiment takes the length of the target strip steel as one of factors for estimating the abrasion of the working rolls, so that a more accurate prediction result can be obtained.
Step S102: and acquiring the wear coefficient of the target strip steel to the target position point.
By wear coefficient, it is understood: when the target strip steel is rolled, the volume loss of the working roll to the target position point under different rolling working conditions is caused.
As an alternative embodiment, step S102 includes:
obtaining the rolling reduction, the unit rolling force along the width direction, the rolling reduction and the outlet thickness of a working roll when the working roll rolls a target strip steel in a target service period, wherein the outlet thickness is the target thickness which needs to be achieved after the target strip steel is rolled at the working roll;
after the target strip steel is finish-rolled by all the stands of the finishing mill, the required finished product thickness is achieved, in order to achieve the target of the finished product thickness, the target needs to be subdivided among different stands, so that the target thickness which needs to be achieved at the outlet of each stand is obtained, and the target thickness is the outlet thickness.
And obtaining the thickness of a finished product of the target strip steel, wherein the thickness of the finished product is the target thickness which needs to be reached after the finish rolling of the target strip steel is completed by the finish rolling mill.
And acquiring the roll diameter of the working roll.
And obtaining the wear coefficient based on the reduction rate, the unit rolling force, the reduction, the outlet thickness, the finished product thickness and the roll diameter.
In the embodiment, when the abrasion coefficient is considered, not only the specification of the strip steel but also the rolling condition required for achieving the required specification of the strip steel and the roll diameter of the working roll are considered, and because different rolling conditions and roll diameters of the working roll bear different loads when the same strip steel is rolled, the embodiment takes the specification of the strip steel, the rolling condition required for achieving the required specification of the strip steel and the roll diameter of the working roll as factors for estimating the abrasion of the working roll, and can obtain a more accurate prediction result.
As an alternative embodiment, the obtaining of the wear coefficient of the target strip steel to the target position point based on the reduction rate, the unit rolling force, the reduction, the exit thickness, the finished product thickness and the roll diameter includes:
based on the following equation:
Figure BDA0002657744440000051
obtaining the abrasion coefficient of the target strip steel to the target position point,
wherein, wi,jThe abrasion coefficient of the jth strip steel to a target position point is the wearing coefficient of a working roll in service of an ith frame, the ith frame is a frame in service of the working roll in the target service roll period, the jth strip steel is a target strip steel rolled by the working roll in the target service roll period, Ei,jReduction ratio, F, for the ith stand rolling the jth stripi,jThe unit rolling force in the width direction, delta h, of the ith frame when rolling the jth strip steeli,jRolling reduction h of the ith framei,jOutlet thickness, h, for the ith stand when rolling the jth stripfTarget finished thickness of strip steel, RiThe roll diameter of the working roll is shown, and i and j are positive integers.
Step S103: and acquiring the wear distribution characteristic coefficient of the target strip steel to the target position point.
The wear profile characteristic coefficient can be understood as: when the working roll rolls the target strip steel, the target strip steel is worn at different position points in the axial direction of the working roll.
As an alternative embodiment, step S103 includes:
taking a first end part of the working roller as a zero point and an axial direction of the working roller as a coordinate axis, and acquiring a distribution coordinate x of a target position point on the working roller, wherein the first end part is an operation end or a transmission end of the working roller;
when x is equal to 0, Z), deltai,j(x)＝0；
When x is equal to [ Z, Z + D ∈]When the temperature of the water is higher than the set temperature,
Figure BDA0002657744440000061
when x is formed into (Z + D, Z + B)jwhen-D), δi,j(x)＝1；
When x is equal to [ Z + B ]j-D,Z+Bj]When the temperature of the water is higher than the set temperature,
Figure BDA0002657744440000062
when x is equal to [ Z + B ]j,L]When is deltai,j(x) 0, wherein,
Figure BDA0002657744440000063
δi,j(x) The wear distribution characteristic coefficient of the jth strip steel to the target position point is shown, the ith rack is a rack with a working roll in service in a target service roll period, the jth strip steel is a target strip steel rolled by the working roll in the target service roll period, D is the length of an edge wear compensation area of the target strip steel, a and B are edge wear area compensation coefficients of the strip steel, L is the axial length of the working roll, B is the axial length of the working roll, andjwidth of jth strip, Si,jThe roll shifting value of the ith frame when the jth strip steel is rolled is shown, wherein i and j are positive integers.
In the present embodiment, the first and second electrodes are,
Figure BDA0002657744440000064
when x belongs to [0, Z ], the section is not contacted with the target strip steel, therefore, the target strip steel can not cause abrasion to the section, therefore, the abrasion distribution characteristic coefficient is zero, correspondingly, the other end of the working roll, namely x belongs to [ Z + B ]j,L]The same is true, and the description is omitted here.
And in x ∈ [ Z, Z + D]In the actual production process, the abrasion of the working roll is the most serious, the abrasion is compensated, a compensation formula is obtained by fitting according to actual production data, a is 0.6, b is 0.9, and the abrasion distribution characteristic coefficient obtained after compensation can be used for predicting the abrasion of the working roll more accurately, correspondingly, the abrasion of the working roll can be predicted more accurately when the abrasion of the working roll is predictedThe other end of the work roll, i.e. x ∈ [ Z + B ]j-D,Z+Bj]The same is true, and the description is omitted here.
And in x ∈ [ Z + D, Z + Bj-D]In the process, namely the middle area of the wear compensation area of the two side edge parts of the strip steel is removed, and the wear of the working roll is in a normal level and is not compensated in the actual production process.
Step S104: and obtaining the abrasion loss of the rolling target strip steel of the target position point in the target service period based on the length, the abrasion coefficient and the abrasion distribution characteristic coefficient.
As an alternative embodiment, step S104 includes:
based on the following equation: wi,j(x)＝δi,j(x)*wi,j*LENjAnd the abrasion loss of the rolling target strip steel of the target position point in the target service period is obtained, wherein,
Wi,j(x) The abrasion amount of the jth strip steel to a target position point is the wearing capacity of the work roll when the ith rack is in service, the ith rack is a rack in which the work roll is in service during the target service roll, the jth strip steel is a target strip steel rolled by the work roll during the target service roll, and deltai,j(x) The wear distribution characteristic coefficient, LEN, of the jth strip steel to the target position pointjIs the length, w, of the jth stripi,jAnd the abrasion coefficient of the jth strip steel to the target position point is shown, and i and j are positive integers.
Step S105: and obtaining the abrasion loss of the working roll in the axial direction based on the abrasion loss of each strip steel rolled in each service period at each position point on the working roll.
The core idea of this embodiment is that the local wear of the work roll is quantitatively estimated according to the rolling condition of the work roll after grinding in each service cycle, so as to guide the operator whether the work roll can be operated again.
For the working roll needing to be estimated, any one of the position points of the working roll along the axial direction is selected as a target position point, any one of the service cycles of the working roll is selected as a target service cycle, any one of the strip steels rolled by the target position point in the target service cycle is selected as a target strip steel, and further the abrasion loss of the target strip steel rolled by the target position point in the target service cycle can be obtained through the embodiment.
Then, sequentially taking each position point distributed along the axial direction of the working roll as a target position point, taking each service period of the working roll in service as a target service period, taking each strip steel rolled in the target service period by the target position point as a target strip steel, obtaining the abrasion loss of each strip steel rolled in each service period by each position point distributed along the axial direction of the working roll, and obtaining the current abrasion loss of the position point on the working roll by accumulating the abrasion loss of each strip steel rolled in each service period by a single position point.
As an alternative embodiment, step S105 includes:
based on the following equation:
Figure BDA0002657744440000071
and obtaining the abrasion loss of the target position point after each service period, wherein,
WERA (x) is the wear of the target location point after M service periods, NkTotal number of blocks, W, of strip steel rolled in the kth service cycle for the working rollsik,j(x) And the abrasion amount of the jth strip steel to the target position point is measured when the working roll is in service with the ith frame in the kth service cycle.
The above embodiments are explained below by a specific example.
The invention is applied to a 7-frame finishing mill group of a certain hot strip steel mill, and the high-speed steel working roll is mainly applied to working rolls of F1-F4 frames (corresponding to the frame numbers of 1-4). And (3) selecting a set of high-speed steel working rolls, and calculating and tracking the abrasion loss after the high-speed steel working rolls are used on the machine for multiple times. The basic use of this high speed steel work roll is shown in table 1:
TABLE 1
Figure BDA0002657744440000072
The working roll is used on a machine for 6 times after being ground once, and relevant process parameters of the roll feeding period of each time are shown in attached tables 2-7.
TABLE 2 Key Process parameters for No. 1 on-machine use
Figure BDA0002657744440000073
Figure BDA0002657744440000081
Figure BDA0002657744440000091
TABLE 3 Key Process parameters for 2 nd run-in
Figure BDA0002657744440000101
Figure BDA0002657744440000111
Figure BDA0002657744440000121
Figure BDA0002657744440000131
TABLE 4 Key Process parameters for 3 rd run
Figure BDA0002657744440000132
Figure BDA0002657744440000141
Figure BDA0002657744440000151
Figure BDA0002657744440000161
TABLE 5 Key Process parameters for 4 th run-on
Figure BDA0002657744440000162
Figure BDA0002657744440000171
Figure BDA0002657744440000181
TABLE 6 Key Process parameters for No. 5 run-on
Figure BDA0002657744440000191
Figure BDA0002657744440000201
Figure BDA0002657744440000211
TABLE 7 Key Process parameters for the 6 th run
Figure BDA0002657744440000212
Figure BDA0002657744440000221
Figure BDA0002657744440000231
The wear of the high-speed steel working roll after being used on the machine for the 3 rd time and the 6 th time is tracked and measured, the wear distribution curve obtained by actual measurement is obtained and is compared with the wear distribution curve predicted by the estimation method established by the invention, as shown in the figures 2 and 3, the estimation method for the local wear of the high-speed steel working roll of the hot rolling finishing mill, which is established by the invention, can accurately calculate the position and the wear degree of the local wear caused by the wear characteristic of the edge of the strip steel in the use process of the high-speed steel working roll.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
the method for estimating the local wear of the high-speed steel working roll integrates the length of the target strip steel rolled by the target position point in the target service period, the wear coefficient of the target strip steel to the target position point, and the influence of the wear distribution characteristic coefficient of the target strip steel to the target position point on the wear loss to obtain the wear loss of the target strip steel rolled by the target position point in the target service period, further based on the abrasion loss of each strip steel rolled in each service period at each position point, the abrasion loss of the working roll in the axial direction is obtained, thereby being capable of accurately forecasting the abrasion condition of the working roll after each service period without mounting a grinding machine, the problem that in the prior art, when the local abrasion loss of the working roller of the lower machine is estimated manually, the estimation error usually causes the product plate profile defect to cause quality loss or the roller is abraded in advance to cause the roller consumption cost to be increased is solved.
Example two
As shown in fig. 4, the embodiment provides an estimation device for local wear of a high-speed steel work roll, which includes:
the first obtaining module 201 is configured to obtain the length of a target strip steel, for the target strip steel rolled in a target service cycle by target position points of the working roll, which are axially distributed, where the target position point is any one of the position points of the working roll, the target service cycle is any one of the service cycles of the working roll, and the target strip steel is any one of the strip steels rolled in the target service cycle by the target position points;
the second obtaining module 202 is configured to obtain a wear coefficient of the target strip steel to the target position point;
the third obtaining module 203 is configured to obtain a wear distribution characteristic coefficient of the target strip steel with respect to the target position point;
the first obtaining module 204 is configured to obtain a wear amount of a target strip steel rolled by a target position point in a target service period according to the length, the wear coefficient and the wear distribution characteristic coefficient;
and the second obtaining module 205 is used for obtaining the abrasion loss of the working roll in the axial direction according to the abrasion loss of each strip steel rolled in each service period at each position point on the working roll.
As an optional embodiment, the second obtaining module 202 is specifically configured to:
obtaining the rolling reduction, the unit rolling force along the width direction, the rolling reduction and the outlet thickness of a working roll when the working roll rolls a target strip steel in a target service period, wherein the outlet thickness is the target thickness which needs to be achieved after the target strip steel is rolled at the working roll;
obtaining the thickness of a finished product of the target strip steel, wherein the thickness of the finished product is the target thickness which needs to be reached after the finish rolling of the target strip steel is completed by a finishing mill;
acquiring the roll diameter of a working roll;
and obtaining the wear coefficient based on the reduction rate, the unit rolling force, the reduction, the outlet thickness, the finished product thickness and the roll diameter.
As an alternative embodiment, the second obtaining module 202 is further configured to:
based on the following equation:
Figure BDA0002657744440000241
obtaining the abrasion coefficient of the target strip steel to the target position point,
wherein, wi,jThe abrasion coefficient of the jth strip steel to a target position point is the wearing coefficient of a working roll in service of an ith frame, the ith frame is a frame in service of the working roll in the target service roll period, the jth strip steel is a target strip steel rolled by the working roll in the target service roll period, Ei,jReduction ratio, F, for the ith stand rolling the jth stripi,jThe unit rolling force in the width direction, delta h, of the ith frame when rolling the jth strip steeli,jRolling reduction h of the ith framei,jOutlet thickness, h, for the ith stand when rolling the jth stripfTarget finished thickness of strip steel, RiThe roll diameter of the working roll is shown, and i and j are positive integers.
As an optional embodiment, the third obtaining module 203 is specifically configured to:
taking a first end part of the working roller as a zero point and an axial direction of the working roller as a coordinate axis, and acquiring a distribution coordinate x of a target position point on the working roller, wherein the first end part is an operation end or a transmission end of the working roller;
when x is equal to 0, Z), deltai,j(x)＝0；
When x is equal to [ Z, Z + D ∈]When the temperature of the water is higher than the set temperature,
Figure BDA0002657744440000242
when x is formed into (Z + D, Z + B)jwhen-D), δi,j(x)＝1；
When x is equal to [ Z + B ]j-D,Z+Bj]When the temperature of the water is higher than the set temperature,
Figure BDA0002657744440000243
when x is equal to [ Z + B ]j,L]When is deltai,j(x) 0, wherein,
Figure BDA0002657744440000244
δi,j(x) The wear distribution characteristic coefficient of the jth strip steel to the target position point, the ith frame is a frame with a working roll in service in the target service roll period, the jth strip steel is a target strip steel rolled by the working roll in the target service roll period, and D is the length of an edge wear compensation area of the target strip steelDegree, a and B are compensation coefficients of edge wear area of strip steel, L is axial length of working roll, BjWidth of jth strip, Si,jThe roll shifting value of the ith frame when the jth strip steel is rolled is shown, wherein i and j are positive integers.
As an alternative embodiment, the first obtaining module 204 is specifically configured to:
based on the following equation: wi,j(x)＝δi,j(x)*wi,j*LENjAnd the abrasion loss of the rolling target strip steel of the target position point in the target service period is obtained, wherein,
Wi,j(x) The abrasion amount of the jth strip steel to a target position point is the wearing capacity of the work roll when the ith rack is in service, the ith rack is a rack in which the work roll is in service during the target service roll, the jth strip steel is a target strip steel rolled by the work roll during the target service roll, and deltai,j(x) The wear distribution characteristic coefficient, LEN, of the jth strip steel to the target position pointjIs the length, w, of the jth stripi,jAnd the abrasion coefficient of the jth strip steel to the target position point is shown, and i and j are positive integers.
As an alternative embodiment, the second obtaining module 205 is specifically configured to:
based on the following equation:
Figure BDA0002657744440000251
and obtaining the abrasion loss of the target position point after each service period, wherein,
WERA (x) is the wear of the target location point after M service periods, NkThe total number of the strip steel rolled by the working roll in the kth service period,
Figure BDA0002657744440000252
and the abrasion amount of the jth strip steel to the target position point is measured when the working roll is in service with the ith frame in the kth service cycle.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
the device for estimating the local wear of the high-speed steel working roll integrates the length of the target strip steel rolled by the target position point in the target service cycle, the wear coefficient of the target strip steel to the target position point, and the influence of the wear distribution characteristic coefficient of the target strip steel to the target position point on the wear loss to obtain the wear loss of the target strip steel rolled by the target position point in the target service cycle, further based on the abrasion loss of each strip steel rolled in each service period at each position point, the abrasion loss of the working roll in the axial direction is obtained, thereby being capable of accurately forecasting the abrasion condition of the working roll after each service period without mounting a grinding machine, the problem that in the prior art, when the local abrasion loss of the working roller of the lower machine is estimated manually, the estimation error usually causes the product plate profile defect to cause quality loss or the roller is abraded in advance to cause the roller consumption cost to be increased is solved.
EXAMPLE III
As shown in fig. 5, the present embodiment provides an electronic device 300 including: a memory 310, a processor 320 and a computer program 311 stored on the memory 310 and executable on the processor 320, wherein the following method steps are realized when the processor 320 executes the program 311:
the method comprises the steps of obtaining the length of a target strip steel rolled in a target service period by aiming at target position points axially distributed by a working roller, wherein the target position points are any one of the position points axially distributed by the working roller, the target service period is any one of the service periods of the working roller, and the target strip steel is any one of the strip steels rolled in the target service period by the target position points; acquiring the wear coefficient of the target strip steel to a target position point; acquiring a wear distribution characteristic coefficient of the target strip steel to a target position point; based on the length, the wear coefficient and the wear distribution characteristic coefficient, the wear amount of the target strip steel rolled by the target position point in the target service period is obtained; and obtaining the abrasion loss of the working roll in the axial direction based on the abrasion loss of each strip steel rolled in each service period at each position point on the working roll.
In a specific implementation, when the processor 320 executes the program 311, any method steps in the first embodiment may also be implemented.
Example four
As shown in fig. 6, a computer-readable storage medium 400, on which a computer program 411 is stored, which computer program 411, when being executed by a processor, carries out the steps of:
the method comprises the steps of obtaining the length of a target strip steel rolled in a target service period by aiming at target position points axially distributed by a working roller, wherein the target position points are any one of the position points axially distributed by the working roller, the target service period is any one of the service periods of the working roller, and the target strip steel is any one of the strip steels rolled in the target service period by the target position points; acquiring the wear coefficient of the target strip steel to a target position point; acquiring a wear distribution characteristic coefficient of the target strip steel to a target position point; based on the length, the wear coefficient and the wear distribution characteristic coefficient, the wear amount of the target strip steel rolled by the target position point in the target service period is obtained; and obtaining the abrasion loss of the working roll in the axial direction based on the abrasion loss of each strip steel rolled in each service period at each position point on the working roll.
In a specific implementation, the computer program 411 may implement any of the method steps of the first embodiment when executed by a processor.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (9)

1. A method for predicting local wear of a high-speed steel working roll is characterized by comprising the following steps:
the method comprises the steps of obtaining the length of a target strip steel rolled in a target service period by aiming at target position points axially distributed by a working roller, wherein the target position points are any one of the position points axially distributed by the working roller, the target service period is any one of the service periods of the working roller, and the target strip steel is any one of the strip steels rolled in the target service period by the target position points;
acquiring the wear coefficient of the target strip steel to the target position point;
acquiring a wear distribution characteristic coefficient of the target strip steel to the target position point;
based on the length, the wear coefficient and the wear distribution characteristic coefficient, obtaining the wear amount of the target strip steel rolled by the target position point in the target service period;
and obtaining the abrasion loss of the working roll in the axial direction based on the abrasion loss of each strip steel rolled in each service period at each position point on the working roll.
2. The estimation method of claim 1, wherein the obtaining of the wear coefficient of the target strip steel to the target position point comprises:
obtaining the rolling reduction, the unit rolling force along the width direction, the rolling reduction and the outlet thickness of the working roll when the working roll rolls the target strip steel in the target service period, wherein the outlet thickness is the target thickness which needs to be reached after the target strip steel is rolled at the working roll;
obtaining the thickness of a finished product of the target strip steel, wherein the thickness of the finished product is the target thickness which needs to be reached after the finish rolling of the target strip steel is completed by a finishing mill;
acquiring the roll diameter of the working roll;
and obtaining the wear coefficient based on the reduction rate, the unit rolling force, the reduction, the outlet thickness, the finished product thickness and the roll diameter.
3. The prediction method of claim 2, wherein the obtaining the wear coefficient of the target strip steel to the target position point based on the reduction ratio, the unit rolling force, the reduction, the exit thickness, the finish thickness, and the roll diameter comprises:
based on the following equation:
Figure FDA0002657744430000021
obtaining the wear coefficient of the target strip steel to the target position point,
wherein, wi,jWhen the working roll is in service in the ith frame, the jth strip steel has the wear coefficient to the target position point, the ith frame is the frame in which the working roll is in service in the target service roll period, the jth strip steel is the target strip steel rolled by the working roll in the target service roll period, and Ei,jRolling the jth strip steel for the ith stand at a reduction ratio Fi,jA unit rolling force in the width direction, Δ h, for the ith frame when rolling the jth strip steeli,jRolling the jth strip steel for the ith stand by the rolling reduction hi,jThe outlet thickness h of the ith frame when the jth strip steel is rolledfIs the finished thickness, R, of the target stripiAnd i and j are positive integers, wherein the i and the j are the roll diameter of the working roll.
4. The estimation method of claim 1, wherein the obtaining of the wear distribution characteristic coefficient of the target strip steel to the target position point comprises:
taking a first end part of the working roller as a zero point and an axial direction of the working roller as a coordinate axis, and acquiring a distribution coordinate x of the target position point on the working roller, wherein the first end part is an operation end or a transmission end of the working roller;
when x is equal to 0, Z), deltai,j(x)＝0；
When x is equal to [ Z, Z + D ∈]When the temperature of the water is higher than the set temperature,
Figure FDA0002657744430000022
when x ∈(Z+D,Z+Bjwhen-D), δi,j(x)＝1；
When x is equal to [ Z + B ]j-D,Z+Bj]When the temperature of the water is higher than the set temperature,
Figure FDA0002657744430000023
when x is equal to [ Z + B ]j,L]When is deltai,j(x) 0, wherein,
Figure FDA0002657744430000024
δi,j(x) The jth strip steel is a frame with a working roll in service in the target service roll period, the jth strip steel is a target strip steel rolled in the target service roll period, D is the length of an edge wear compensation area of the target strip steel, a and B are strip steel edge wear area compensation coefficients, L is the axial length of the working roll, B is the wear distribution characteristic coefficient of the target roll, andjis the width, S, of the jth strip steeli,jAnd the roll shifting value of the ith rack in the process of rolling the jth strip steel is shown, wherein i and j are positive integers.
5. The estimation method of claim 1, wherein the obtaining of the wear amount of the target strip steel rolled by the target position point in the target service period based on the length, the wear coefficient and the wear distribution characteristic coefficient comprises:
based on the following equation: wi,j(x)＝δi,j(x)*wi,j*LENjAnd obtaining the abrasion loss of the target strip steel rolled by the target position point in the target service period, wherein,
Wi,j(x) When the working roll is in service in the ith frame, the jth strip steel is the wear extent of the target position point, the ith frame is the frame in which the working roll is in service in the target service roll period, and the jth strip steel is the target strip steel rolled by the working roll in the target service roll period, deltai,j(x) For the jth beltWear distribution characteristic coefficient, LEN, of steel to the target location pointjIs the length, w, of the jth strip steeli,jAnd i and j are positive integers, wherein the abrasion coefficient of the jth strip steel to the target position point is shown.
6. The prediction method of claim 5, wherein the obtaining the wear amount of the working rolls in the axial direction based on the wear amount of each strip steel rolled in each service period at each position point on the working rolls comprises:
based on the following equation:
Figure FDA0002657744430000031
obtaining the abrasion loss of the target position point after each service period, wherein,
WERA (x) is the wear of the target location point after M service periods, NkThe total number of the strip steel rolled by the working roll in the kth service cycle, Wik,j(x) And when the working roll is in service in the ith frame in the kth service cycle, the jth strip steel has the abrasion loss to the target position point.
7. A device for predicting local wear of a high-speed steel working roll is characterized by comprising:
the first acquisition module is used for acquiring the length of a target strip steel rolled in a target service cycle by aiming at target position points axially distributed on a working roller, wherein the target position points are any one of the position points axially distributed on the working roller, the target service cycle is any one of the service cycles of the working roller, and the target strip steel is any one of the strip steels rolled in the target service cycle by the target position points;
the second acquisition module is used for acquiring the wear coefficient of the target strip steel to the target position point;
the third acquisition module is used for acquiring the wear distribution characteristic coefficient of the target strip steel to the target position point;
the first obtaining module is used for obtaining the abrasion loss of the target strip steel rolled by the target position point in the target service period according to the length, the abrasion coefficient and the abrasion distribution characteristic coefficient;
and the second obtaining module is used for obtaining the abrasion loss of the working roll in the axial direction according to the abrasion loss of each strip steel rolled in each service period at each position point on the working roll.
8. An electronic device, comprising: memory, processor and computer program stored on the memory and executable on the processor, the processor when executing the program implementing the method steps according to any of claims 1-6.
9. A computer-readable storage medium having stored thereon a computer program comprising: the program may, when executed by a processor, implement the method steps of any of claims 1-6.
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