CN112257220B - Method and device for acquiring local wear degree of high-speed steel working roller - Google Patents
Method and device for acquiring local wear degree of high-speed steel working roller Download PDFInfo
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Abstract
The invention discloses a method and a device for acquiring the local wear degree of a high-speed steel working roller, wherein the method comprises the following steps: dividing a target roll gap area in sequence to obtain N roll gap points; acquiring a first abrasion loss of an upper working roll at a target roll gap point in a current roll shifting state; acquiring a second abrasion loss of the working roll at a target roll gap point under the current roll shifting state; obtaining the total local wear amount of a target roll gap area at a target roll gap point under the current roll shifting state based on the sum of the first wear amount and the second wear amount; obtaining a maximum local wear total amount and a minimum local wear total amount located in the edge wear region based on the local wear total amount of the target roll gap region at each roll gap point; the invention obtains the local wear degree of the working roll in the current roll shifting state based on the maximum local wear total amount and the minimum local wear total amount, and solves the problem that the high-speed steel working roll has poor local wear state and is continuously operated to use due to the lack of a quantitative evaluation method and standard for the local wear degree of the high-speed steel working roll, so that the product has the defect of plate profile quality.
Description
Technical Field
The invention relates to the technical field of steel rolling, in particular to a method and a device for acquiring local wear degree of a high-speed steel working roll.
Background
The application of high-speed steel rolls as working rolls on finishing mill F1-F4 frames of a hot rolled steel strip production line is more and more common. Compared with the common high-chromium steel roll, the high-speed steel roll has the advantages that the high-speed steel working roll has high wear resistance, can continuously serve a plurality of hot rolling rolls after being ground once, and has positive effects on reducing the roll consumption cost of a production line and improving the production efficiency.
In a service cycle of the high-speed steel roll, after each hot rolling period is finished, only the local abrasion loss of the high-speed steel working roll which is off the machine is predicted or measured, so that an abrasion distribution curve of the working roll in the axial direction is obtained, but a quantitative evaluation method and a standard for the local abrasion loss of the high-speed steel working roll are lacked, so that the high-speed steel working roll has a local abrasion state which is poor, and is continuously used on the machine, so that a product has local raised plate profile quality defects.
Disclosure of Invention
The embodiment of the application provides a method and a device for acquiring the local wear degree of the high-speed steel working roller, and solves the problem that in the prior art, a quantitative evaluation method and a standard for the local wear degree of the high-speed steel working roller are lacked, so that the high-speed steel working roller has a local wear state which is poor and is continuously operated on a machine for use, and thus the product has a local raised plate profile quality defect.
In a first aspect, the present application provides the following technical solutions through an embodiment of the present application:
a method of obtaining a local wear level of a high speed steel work roll for use in a roll of a hot finishing mill, the roll comprising: the method comprises the following steps of working rolls and supporting rolls, wherein the working rolls comprise upper working rolls and lower working rolls, roll gap areas corresponding to the supporting rolls are target roll gap areas, and the obtaining method comprises the following steps: sequentially dividing the target roll gap area based on a first preset interval along the axial direction to obtain N roll gap points, wherein N is a positive integer; acquiring a first abrasion loss of the upper working roll at a target roll gap point under the current roll shifting state based on the abrasion distribution curve of the upper working roll, wherein the target roll gap point is any one point of the N roll gap points; acquiring a second abrasion loss of the lower working roll at the target roll gap point under the current roll shifting state based on the abrasion distribution curve of the lower working roll; obtaining the total local wear amount of the target roll gap area at the target roll gap point under the current roll shifting state based on the sum of the first wear amount and the second wear amount; obtaining a maximum local wear total amount and a minimum local wear total amount which are positioned in an edge wear area based on the local wear total amount of the target roll gap area at each roll gap point, wherein the edge wear area is an area between the edge of the target roll gap area and a preset position, and the preset position is a position on the target roll gap area, which keeps a second preset distance from the edge of the target roll gap area; and obtaining the wear degree of the working roll under the current roll shifting state based on the maximum local wear total amount and the minimum local wear total amount.
As an alternative embodiment, the obtaining a first wear amount of the upper working roll at a target roll gap point in a current roll shifting state based on the wear profile of the upper working roll includes: sequentially dividing the upper working roll based on the first preset interval along the axial direction to obtain M upper mark points, wherein M is a positive integer; acquiring an upper mark point corresponding to the target roll gap point of the upper working roll in the current roll shifting state as an upper target mark point; and acquiring a first abrasion loss of the upper working roll at the upper target marking point based on the abrasion distribution curve of the upper working roll.
As an optional embodiment, the acquiring an upper mark point corresponding to the target roll gap point of the upper working roll in the current roll shifting state as an upper target mark point includes: taking the jth roll gap point as the target roll gap point, and based on the following equation
Acquiring an ith upper mark point corresponding to the jth roll gap point of the upper working roll in the current roll shifting state, and taking the ith upper mark point as the upper target mark point, wherein L W Is the length of the working roll, L B Taking the length of the supporting roller, S is the roll shifting amount of the working roller, delta d is the first preset interval, i and j are positive integers, i is more than or equal to 1 and is less than or equal to M, j is more than or equal to 1 and is less than or equal to N, and N = L B /Δd，M＝L W /Δd。
As an alternative embodiment, the obtaining a second wear amount of the lower working roll at the target roll gap point in the current roll shifting state based on the wear profile of the upper working roll includes: sequentially dividing the lower working roll based on the first preset interval along the axial direction to obtain M lower mark points, wherein M is a positive integer; acquiring a lower mark point corresponding to the target roll gap point of the lower working roll in the current roll shifting state as a lower target mark point; and acquiring a second abrasion loss of the lower working roll at the lower target marking point based on the abrasion distribution curve of the lower working roll.
As an alternative embodiment, the acquiring, as a lower target mark point, a lower mark point corresponding to the target roll gap point of the lower working roll in the current roll shifting state includes: taking the jth roll gap point as the target roll gap point, and based on the following equation
Acquiring an ith lower mark point corresponding to the jth roll gap point of the lower working roll in the current roll shifting state, and taking the ith lower mark point as the lower target mark point, wherein L W Is the length of the working roll, L B Taking the length of the supporting roller, S is the roll shifting amount of the working roller, delta d is the first preset interval, i and j are positive integers, i is more than or equal to 1 and is less than or equal to M, j is more than or equal to 1 and is less than or equal to N, and N = L B /Δd，M＝L W /Δd。
As an alternative embodiment, the obtaining the maximum local wear total and the minimum local wear total in the edge wear zone based on the local wear total of the target roll gap region at each roll gap point includes: taking the total local wear amount of the first roll gap point as the current maximum total local wear amount, sequentially judging whether the total local wear amount of the j-th roll gap point is larger than the current maximum total local wear amount, if so, updating the current maximum total local wear amount by using the total local wear amount of the j-th roll gap point, sequentially taking the j as a positive integer from 1 to Z, and taking the current maximum total local wear amount as the maximum total local wear amount positioned in the edge wear area until the j is taken as Z; using the maximum local wear total amount as the current minimum local wear total amount, sequentially judging whether the local wear total amount of the j-th roll gap point is smaller than the current minimum local wear total amount, if so, updating the current minimum local wear total amount by using the local wear total amount of the j-th roll gap point, sequentially taking the j as a positive integer from 1 to Z, and using the current minimum local wear total amount as the minimum local wear total amount positioned in the edge wear area until the j takes the Z,
L P width, L, of strip to be rolled by said working rolls B Is the length of the backup roll, L E The second preset pitch.
As an alternative embodiment, the obtaining the wear degree of the work roll in the current roll shifting state based on the maximum partial wear total amount and the minimum partial wear total amount includes: setting a grading gradient delta G; based on the following equation
Obtaining the abrasion degree of the working roll in the current roll shifting state, wherein C is the abrasion degree of the working roll, delta G is the grading gradient, G is max For said maximum total local wear, G min Is the minimum total local wear.
In a second aspect, the present application provides the following technical solutions according to an embodiment of the present application:
an apparatus for obtaining a degree of wear of a high-speed steel work roll for use in a roll of a hot finishing mill, the roll comprising: the working roll comprises an upper working roll and a lower working roll, the roll gap area corresponding to the supporting roll is a target roll gap area, and the acquisition device comprises: the dividing module is used for sequentially dividing the target roll gap area based on a first preset interval along the axial direction to obtain N roll gap points, wherein N is a positive integer; the first acquisition module is used for acquiring a first abrasion loss of the upper working roll at a target roll gap point under the current roll shifting state on the basis of the abrasion distribution curve of the upper working roll, wherein the target roll gap point is any one of the N roll gap points; the second acquisition module is used for acquiring a second abrasion loss of the lower working roll at the target roll gap point under the current roll shifting state based on the abrasion distribution curve of the lower working roll; a first obtaining module, configured to obtain a total local wear amount of the target roll gap region at the target roll gap point in the current roll shifting state based on a sum of the first wear amount and the second wear amount; the obtaining module is used for obtaining the maximum local wear total amount and the minimum local wear total amount which are positioned in an edge wear area based on the local wear total amount of the target roll gap area at each roll gap point, wherein the edge wear area is an area from the edge of the target roll gap area to a preset position, and the preset position is a position on the target roll gap area and keeps a second preset distance from the edge of the target roll gap area; and the second obtaining module is used for obtaining the wear degree of the working roll in the current roll shifting state based on the maximum local wear total amount and the minimum local wear total amount.
In a third aspect, the present application provides the following technical solutions through an embodiment of the present application:
an electronic device, comprising: memory, a processor and a 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 comprises the steps of obtaining a first abrasion amount of an upper working roll at a target roll gap point and a second abrasion amount of a lower working roll at the target roll gap point when the working roll is in a current roll shifting state, obtaining a total local abrasion amount of the target roll gap area at the target roll gap point under the current roll shifting state, obtaining a total local abrasion amount of the target roll gap area at N roll gap points, and obtaining a total local abrasion amount of the target roll gap area at the N roll gap points.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below 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 obtaining a local wear level of a high-speed steel work roll according to an embodiment of the present disclosure;
FIG. 2 is a schematic view of a wear profile of an upper work roll provided in accordance with an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of an apparatus for obtaining a local wear level of a high-speed steel work roll according to the second embodiment of the present application;
fig. 4 is an architecture diagram of an electronic device according to a third embodiment of the present application;
fig. 5 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 acquiring the local wear degree of the high-speed steel working roll, and solves the problem that in the prior art, a quantitative evaluation method and a standard for the local wear degree of the high-speed steel working roll are lacked, so that the high-speed steel working roll has a local wear state which is poor and is continuously operated on a machine for use, and thus the product has a locally-bulged plate profile quality defect.
In order to solve the technical problems, the general idea of the embodiment of the application is as follows:
the method comprises the steps of obtaining a first abrasion quantity of an upper working roll at a target roll gap point and a second abrasion quantity of a lower working roll at the target roll gap point when the working rolls are in a current roll shifting state, obtaining a total local abrasion quantity of the target roll gap area at the target roll gap point under the current roll shifting state, further obtaining a total local abrasion quantity of the target roll gap area at N roll gap points, and solving the problem that the local abrasion quantity of the high-speed steel working rolls in the prior art reflects the defect of the high-speed steel working rolls due to the fact that the maximum total local abrasion quantity and the minimum total local abrasion quantity represent the most extreme condition of abrasion in the edge abrasion area.
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 present embodiment provides a method for obtaining a local wear degree of a high speed steel work roll for use in a roll of a hot finishing mill, the roll including: the working roll comprises an upper working roll and a lower working roll, and a roll gap area corresponding to the supporting roll is a target roll gap area.
Specifically, the roller is from top to bottom in sequence: the strip steel to be rolled passes through a roll gap area between the upper working roll and the lower working roll. When roll shifting is needed, the upper working roll and the lower working roll move in opposite directions along the axial direction, the upper supporting roll and the lower supporting roll cannot move along with the upper working roll and the lower supporting roll, a roll gap area aligned in the vertical direction of the upper supporting roll and the lower supporting roll is a target roll gap area, a strip steel can pass through the area without exceeding the area, and in practical application, plate profile quality defects of subsequent products are usually shown on the edge of the strip steel, namely the wear degree in an edge wear area of the target roll gap area is a key reason for influencing the plate profile quality defects of the subsequent products, such as local bulges, so that the wear degree in the edge wear area of the target roll gap area is considered to have a crucial influence on avoiding the plate profile quality defects of the subsequent products.
Further, the applicant found that the wear of a certain position point in the target roll gap region is determined by the sum of the wear amounts of the upper working roll and the lower working roll at the position point, and when the upper working roll and the lower working roll are in different roll shifting states, the sum of the wear amounts of the upper working roll and the lower working roll at the same position point in the target roll gap region is different.
Based on the discovery, the applicant provides an acquisition method for the local wear degree of a high-speed steel working roll under different roll shifting states, and the acquisition method comprises the following steps:
step S101: and sequentially dividing the target roll gap area based on a first preset interval along the axial direction to obtain N roll gap points, wherein N is a positive integer.
Specifically, based on the position and size of a support roller of the finishing mill, a target roll gap area corresponding to the axial range of the support roller is subjected to discrete processing to divide the target roll gap area to obtain N roll gap points, the number of a mark at the end part of a transmission side is 1, one point is marked at intervals of a first preset distance delta d in the direction of an operation side, the number is sequentially increased until the end part of the operation side, and the number is N = L B A,/Δ d, wherein L B To support the axial length of the roller, Δ d =10mm as an example.
Step S102: based on the wear distribution curve of the upper working roll, as shown in fig. 2, a first wear amount of the upper working roll at a target roll gap point in the current roll shifting state is obtained, and the target roll gap point is any one of the N roll gap points.
It should be noted that the wear profile of the upper work roll refers to: and a curve formed by the abrasion amount of each position on the upper work roll in a coordinate system taking the transmission side end part or the operation side end part as a zero point, the axis of the upper work roll as a horizontal axis and the abrasion amount as a vertical axis.
The wear distribution curve of the upper working roll can be obtained by measuring through an upper grinding machine and can also be obtained by estimating through an estimation model.
As an alternative embodiment, step S102 includes:
and sequentially dividing the upper working roll based on a first preset interval along the axial direction to obtain M upper mark points, wherein M is a positive integer.
Specifically, the upper working roll of the high-speed steel is subjected to discrete processing along the axial direction to divide the upper working roll to obtain M upper marked points, the marked serial number of the end part of the transmission side is 1, one point is marked at intervals of a first preset interval delta d in the direction of the operation side, the serial numbers are sequentially increased to the end part of the operation side, and the serial number is N = L B D, obtaining M upper mark points, wherein D is the length of discrete processing unit-the first preset distance, L W The wear amount at the i-th upper mark point of the upper work roll is represented as W for the axial length of the work roll T (i) In that respect In practical applications, the discrete processing process may also start from the operation-side end.
And acquiring an upper mark point corresponding to the target roll gap point of the upper working roll in the current roll shifting state as an upper target mark point.
And acquiring a first abrasion loss of the upper working roll at the upper target marking point based on the abrasion distribution curve of the upper working roll.
As an optional embodiment, acquiring an upper mark point corresponding to a target roll gap point of an upper working roll in a current roll shifting state as an upper target mark point, including:
the jth roll gap point is taken as a target roll gap point and is based on the following equation
Acquiring an ith upper mark point corresponding to a jth roll gap point of an upper working roll in a current roll shifting state, taking the ith upper mark point as an upper target mark point, wherein,
L W is the length of the work roll, L B For supporting the length of the roller, S is the roller shifting amount of the working roller, delta d is a first preset interval, i and j are positive integers, i is more than or equal to 1 and is less than or equal to M, j is more than or equal to 1 and is less than or equal to N, and N = L B /Δd，M＝L W /Δd。
In the embodiment, the one-to-one correspondence relationship between the jth roll gap point and the ith upper mark point of the upper working roll in the current roll shifting state, namely the roll shifting S state, is provided, so that the abrasion loss of the upper working roll at the target roll gap point is obtained quantitatively.
Step S103: and acquiring a second abrasion loss of the lower working roll at the target roll gap point under the current roll shifting state based on the abrasion distribution curve of the lower working roll.
The wear profile of the lower work roll is: and a curve formed by the abrasion amount of each position on the lower working roll in a coordinate system with the transmission side end or the operation side end as a zero point, the axis of the lower working roll as a horizontal axis and the abrasion amount as a vertical axis.
The wear distribution curve of the lower working roll can be obtained by measuring through an upper grinding machine or estimating through an estimation model, the wear distribution curves of the upper working roll and the lower working roll have axial symmetry properties, and the wear distribution curve of the lower working roll can be obtained by referring to the wear distribution curve of the upper working roll in fig. 2.
As an alternative embodiment, step S103 includes:
and sequentially dividing the lower working rolls based on a first preset interval along the axial direction to obtain M lower mark points, wherein M is a positive integer.
Specifically, discrete processing is carried out on the high-speed steel lower working roll along the axial direction, so that the lower working roll is divided to obtain M lower mark points, the serial number of the end part of the transmission side is 1, one point is marked at intervals of a first preset interval delta d in the direction of the operation side, the serial numbers are sequentially increased until the end part of the operation side, and the serial number is N = L B D, obtaining M lower mark points, wherein D is the length of discrete processing unit-the first preset interval, L W The axial length of the working roll is W, the abrasion loss at the ith lower mark point of the lower working roll is recorded as W B (i) .1. The In factIn application, the discrete processing process can also start from the operation side end.
And acquiring a lower mark point corresponding to the target roll gap point of the lower working roll in the current roll shifting state as a lower target mark point.
And acquiring a second abrasion loss of the lower working roll at the lower target marking point based on the abrasion distribution curve of the lower working roll.
As an optional embodiment, acquiring a lower mark point corresponding to the target roll gap point of the lower working roll in the current roll shifting state as a lower target mark point includes:
regarding the jth roll gap point as a target roll gap point, the following equation is used
Acquiring the ith lower mark point corresponding to the jth roll gap point of the lower working roll in the current roll shifting state, and taking the ith lower mark point as a lower target mark point, wherein,
L W is the length of the work roll, L B For supporting the length of the roller, S is the roller shifting amount of the working roller, delta d is a first preset interval, i and j are positive integers, i is more than or equal to 1 and is less than or equal to M, j is more than or equal to 1 and is less than or equal to N, and N = L B /Δd，M＝L W /Δd。
In the embodiment, the one-to-one correspondence relationship between the jth roll gap point and the ith lower mark point of the lower working roll in the current roll shifting state, namely the roll shifting S state, is provided, so that the abrasion loss of the lower working roll at the target roll gap point is obtained quantitatively.
Step S104: and obtaining the total local wear amount of the target roll gap area at the target roll gap point under the current roll shifting state based on the sum of the first wear amount and the second wear amount.
Namely, the total local wear amount of the jth roll gap point as the target roll gap point is as follows:
step S105: and obtaining the maximum local wear total amount and the minimum local wear total amount which are positioned in an edge wear area based on the local wear total amount of the target roll gap area at each roll gap point, wherein the edge wear area is an area between the edge of the target roll gap area and a preset position, and the preset position is a position on the target roll gap area, which keeps a second preset distance from the edge of the target roll gap area.
As an alternative embodiment, step S105 includes:
taking the total local wear amount of the first roll gap point as the current maximum total local wear amount, sequentially judging whether the total local wear amount of the jth roll gap point is larger than the current maximum total local wear amount, if so, updating the current maximum total local wear amount by using the total local wear amount of the jth roll gap point, sequentially taking positive integers from 1 to Z for j, and taking the current maximum total local wear amount as the maximum total local wear amount positioned in an edge wear area until the j takes Z;
using the maximum local wear total amount as the current minimum local wear total amount, sequentially judging whether the local wear total amount of the j-th roll gap point is smaller than the current minimum local wear total amount, if so, updating the current minimum local wear total amount by using the local wear total amount of the j-th roll gap point, sequentially taking the j as a positive integer from 1 to Z, and using the current minimum local wear total amount as the minimum local wear total amount positioned in an edge wear area until the j takes the Z, wherein,
the equation converts the preset position to the Z-th roll gap point, L, in the target roll gap zone P Width, L, of strip to be rolled for the working rolls B To support the length of the roll, L E A second predetermined pitch.
Since the quality defects of the plate profile of the subsequent product are usually shown on the edge of the strip steel, the embodiment comprehensively considers the factors of the size of the roller and the product specification (the width of the strip steel to be rolled by the working roller), and carries out quantitative calculation on the abrasion of the high-speed steel working roller in the edge abrasion area. According to the embodiment, before the working roll is used on the machine for the next time, the abrasion grade of the working roll in rolling aiming at the product specification can be quantitatively obtained according to the product specification needing to be rolled on the machine for the next time, and the molding degree of the working roll under different working conditions can be more accurately obtained, so that the working roll can be utilized to be in service to the greatest extent.
In this embodiment, the current maximum total local wear amount is set, and the search for the maximum total local wear amount in the edge wear region can be completed most efficiently by sequentially determining whether the total local wear amount at the jth roll gap point is greater than the current maximum total local wear amount. Similarly, the current minimum total local wear amount is set, and whether the total local wear amount of the j-th roll gap point is smaller than the current minimum total local wear amount is sequentially judged, so that the search of the minimum total local wear amount in the edge wear area can be completed most efficiently.
Step S106: and acquiring the wear degree of the working roll in the current roll shifting state based on the maximum local wear total amount and the minimum local wear total amount.
As an alternative embodiment, step S106 includes:
and a grading gradient delta G is set, and each enterprise can set according to different refining grading requirements.
Based on the following equation
Obtaining the abrasion degree of the working roll in the current roll shifting state, wherein C is the abrasion degree of the working roll, delta G is the grading gradient, G max To maximize the total local wear, G min Is the minimum total local wear.
The embodiment can quantitatively and accurately inform an operator of the abrasion degree of the working roll in the current roll shifting state, and has important guiding significance for judging whether the next strip steel can be rolled on the machine.
The above embodiments are explained below by a specific example.
In the production line, the length L of the working roll W =1880mm, backup roll length L B =1580mm, and the width specification of the normally rolled strip steel is L P =1100mm, discrete processing unit length-first preset interval delta in abrasion degree algorithmd =10mm, grading gradient delta G =10um, and grading the abrasion degree of the high-speed steel working roll under the condition of roll shifting of S = -150mm, -100mm, -50mm, 0mm, 50mm, 100mm and 150mm respectively.
The wear profile of the upper work roll of the high speed steel is shown in fig. 2, the wear profile of the lower work roll of the high speed steel is symmetrical, and the rating results by the method of the present invention are shown in table 1.
TABLE 1
It can be seen that the same work roll has different wear levels in the edge wear area under different roll shifting conditions.
The technical scheme in the embodiment of the application at least has the following technical effects or advantages:
the method comprises the steps of obtaining a first abrasion quantity of an upper working roll at a target roll gap point and a second abrasion quantity of a lower working roll at the target roll gap point when the working rolls are in a current roll shifting state, obtaining a total local abrasion quantity of the target roll gap area at the target roll gap point under the current roll shifting state, further obtaining a total local abrasion quantity of the target roll gap area at N roll gap points, and obtaining a wear condition of the target roll gap area at the edge of the roll gap area based on the maximum total local abrasion quantity and the minimum total local abrasion quantity in the edge abrasion area, wherein the maximum total local abrasion quantity and the minimum total local abrasion quantity in the edge abrasion area represent the most extreme condition of abrasion in the edge abrasion area.
Example two
As shown in fig. 3, the present embodiment provides an apparatus for obtaining a wear degree of a high-speed steel work roll for use in a roll of a hot finishing mill, the roll including: the working roll and the backup roll, the working roll includes working roll and lower working roll, and the roll gap region that the backup roll corresponds is the target roll gap region, and the acquisition device includes:
the dividing module 201 is configured to sequentially divide a target roll gap region based on a first preset interval in the axial direction to obtain N roll gap points, where N is a positive integer.
The first obtaining module 202 is used for obtaining a first abrasion loss of the upper working roll at a target roll gap point under the current roll shifting state based on the abrasion distribution curve of the upper working roll, wherein the target roll gap point is any one point of the N roll gap points;
the second acquisition module 203 is used for acquiring a second abrasion loss of the lower working roll at a target roll gap point under the current roll shifting state based on the abrasion distribution curve of the lower working roll;
a first obtaining module 204, configured to obtain a total amount of local wear of a target roll gap region at a target roll gap point in a current roll shifting state based on a sum of the first wear amount and the second wear amount;
the obtaining module 205 is configured to obtain a maximum local wear total amount and a minimum local wear total amount in an edge wear area based on a local wear total amount of the target roll gap area at each roll gap point, where the edge wear area is an area from an edge of the target roll gap area to a preset position, and the preset position is a position on the target roll gap area where a second preset distance is kept from the edge of the target roll gap area;
the second obtaining module 206 obtains the wear degree of the working roll in the current roll shifting state based on the maximum local wear total amount and the minimum local wear total amount.
As an optional embodiment, the first obtaining module 202 is specifically configured to:
sequentially dividing the upper working roll based on a first preset interval along the axial direction to obtain M upper mark points, wherein M is a positive integer;
acquiring an upper mark point corresponding to a target roll gap point of an upper working roll in a current roll shifting state as an upper target mark point;
and acquiring a first abrasion loss of the upper working roll at the upper target marking point based on the abrasion distribution curve of the upper working roll.
As an alternative embodiment, the first obtaining module 202 is further configured to:
the jth roll gap point is taken as a target roll gap point and is based on the following equation
Acquiring an ith upper mark point corresponding to a jth roll gap point of the upper working roll in the current roll shifting state, taking the ith upper mark point as an upper target mark point, wherein,
L W is the length of the work roll, L B For the length of the supporting roll, S is the roll shifting amount of the working roll, delta d is a first preset interval, i and j are positive integers, i is more than or equal to 1 and less than or equal to M, j is more than or equal to 1 and less than or equal to N, and N = L B /Δd，M＝L W /Δd。
As an optional embodiment, the second obtaining module 203 is specifically configured to:
sequentially dividing the lower working rolls based on a first preset interval along the axial direction to obtain M lower mark points, wherein M is a positive integer;
acquiring a lower mark point corresponding to a target roll gap point of the lower working roll in the current roll shifting state as a lower target mark point;
and acquiring a second abrasion loss of the lower working roll at the lower target marking point based on the abrasion distribution curve of the lower working roll.
As an alternative embodiment, the second obtaining module 203 is further configured to:
the jth roll gap point is taken as a target roll gap point and is based on the following equation
Acquiring an ith lower mark point corresponding to a jth roll gap point of the lower working roll in the current roll shifting state, taking the ith lower mark point as a lower target mark point, wherein,
L W is the length of the work roll, L B For the length of the supporting roll, S is the roll shifting amount of the working roll, delta d is a first preset interval, i and j are positive integers, i is more than or equal to 1 and less than or equal to M, j is more than or equal to 1 and less than or equal to N, and N = L B /Δd，M＝L W /Δd。
As an alternative embodiment, the obtaining module 205 is specifically configured to:
taking the total local wear amount of the first roll gap point as the current maximum total local wear amount, sequentially judging whether the total local wear amount of the jth roll gap point is larger than the current maximum total local wear amount, if so, updating the current maximum total local wear amount by using the total local wear amount of the jth roll gap point, sequentially taking positive integers from 1 to Z for j, and taking the current maximum total local wear amount as the maximum total local wear amount positioned in an edge wear area until the j takes Z;
using the maximum local wear total amount as the current minimum local wear total amount, sequentially judging whether the local wear total amount of the jth roll gap point is smaller than the current minimum local wear total amount, if so, updating the current minimum local wear total amount by using the local wear total amount of the jth roll gap point, sequentially taking the j as a positive integer from 1 to Z until the j takes Z, and using the current minimum local wear total amount as the minimum local wear total amount positioned in an edge part wear area, wherein,
L P width, L, of strip to be rolled for the working rolls B To support the length of the roll, L E A second predetermined pitch.
As an alternative embodiment, the second obtaining module 206 is specifically configured to:
setting a grading gradient delta G;
based on the following equation
Obtaining the wear degree of the working roll in the current roll shifting state, wherein C is the wear degree of the working roll, delta G is the grading gradient, G max To maximize the total local wear, G min Is the minimum total local wear.
EXAMPLE III
As shown in fig. 4, the present embodiment provides an electronic device 300, including: a memory 310, a processor 320 and a computer program 311 stored in the memory 310 and executable on the processor 320, wherein the processor 320 when executing the program 311 may implement the following method steps:
sequentially dividing a target roll gap area based on a first preset interval along the axial direction to obtain N roll gap points, wherein N is a positive integer; acquiring a first abrasion loss of the upper working roll at a target roll gap point under the current roll shifting state based on an abrasion distribution curve of the upper working roll, wherein the target roll gap point is any one of N roll gap points; acquiring a second abrasion loss of the lower working roll at a target roll gap point under the current roll shifting state based on the abrasion distribution curve of the lower working roll; obtaining the total local wear amount of a target roll gap area at a target roll gap point under the current roll shifting state based on the sum of the first wear amount and the second wear amount; obtaining the maximum local wear total amount and the minimum local wear total amount which are positioned in an edge wear area based on the local wear total amount of the target roll gap area at each roll gap point, wherein the edge wear area is an area between the edge of the target roll gap area and a preset position, and the preset position is a position on the target roll gap area, which keeps a second preset distance from the edge of the target roll gap area; and acquiring the wear degree of the working roll in the current roll shifting state based on the maximum local wear total amount and the minimum local wear total amount.
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. 5, a computer-readable storage medium 400, on which a computer program 411 is stored, which computer program 411, when executed by a processor, carries out the steps of:
sequentially dividing a target roll gap area based on a first preset interval along the axial direction to obtain N roll gap points, wherein N is a positive integer; acquiring a first abrasion loss of the upper working roll at a target roll gap point under the current roll shifting state based on an abrasion distribution curve of the upper working roll, wherein the target roll gap point is any one of N roll gap points; acquiring a second abrasion loss of the lower working roll at a target roll gap point under the current roll shifting state based on the abrasion distribution curve of the lower working roll; obtaining the total local wear amount of a target roll gap area at a target roll gap point under the current roll shifting state based on the sum of the first wear amount and the second wear amount; obtaining the maximum local wear total amount and the minimum local wear total amount which are positioned in an edge wear area based on the local wear total amount of the target roll gap area at each roll gap point, wherein the edge wear area is an area between the edge of the target roll gap area and a preset position, and the preset position is a position on the target roll gap area, which keeps a second preset distance from the edge of the target roll gap area; and acquiring the wear degree of the working roll in the current roll shifting state based on the maximum local wear total amount and the minimum local wear total amount.
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 (10)
1. A method of obtaining the local wear level of a high speed steel work roll for use in a roll of a hot finishing mill, the roll comprising: the method comprises the following steps of working rolls and supporting rolls, wherein the working rolls comprise upper working rolls and lower working rolls, roll gap areas corresponding to the supporting rolls are target roll gap areas, and the obtaining method comprises the following steps:
sequentially dividing the target roll gap area based on a first preset interval along the axial direction to obtain N roll gap points, wherein N is a positive integer;
acquiring a first abrasion loss of the upper working roll at a target roll gap point under the current roll shifting state based on the abrasion distribution curve of the upper working roll, wherein the target roll gap point is any one point in the N roll gap points;
acquiring a second abrasion loss of the lower working roll at the target roll gap point under the current roll shifting state based on the abrasion distribution curve of the lower working roll;
obtaining the total local wear amount of the target roll gap area at the target roll gap point under the current roll shifting state based on the sum of the first wear amount and the second wear amount;
obtaining a maximum local wear total amount and a minimum local wear total amount which are positioned in an edge wear area based on the local wear total amount of the target roll gap area at each roll gap point, wherein the edge wear area is an area between the edge of the target roll gap area and a preset position, and the preset position is a position on the target roll gap area, which keeps a second preset distance from the edge of the target roll gap area;
and obtaining the wear degree of the working roll under the current roll shifting state based on the maximum local wear total amount and the minimum local wear total amount.
2. The method for obtaining as claimed in claim 1, wherein said obtaining a first wear amount of said upper work roll at a target roll gap point in a current roll-shifting state based on a wear profile of said upper work roll comprises:
sequentially dividing the upper working roll based on the first preset interval along the axial direction to obtain M upper mark points, wherein M is a positive integer;
acquiring an upper mark point corresponding to the target roll gap point of the upper working roll in the current roll shifting state as an upper target mark point;
and acquiring a first abrasion loss of the upper working roll at the upper target marking point based on the abrasion distribution curve of the upper working roll.
3. The method for acquiring as an upper target mark point, the acquiring an upper mark point corresponding to the target roll gap point of the upper work roll in the current roll shifting state, comprising:
taking the jth roll gap point as the target roll gap point, and based on the following equation
Acquiring an ith upper mark point corresponding to the jth roll gap point of the upper working roll in the current roll shifting state, and taking the ith upper mark point as the upper target mark point, wherein,
L W is the length of the working roll, L B Taking the length of the supporting roller, S is the roll shifting amount of the working roller, delta d is the first preset interval, i and j are positive integers, i is more than or equal to 1 and is less than or equal to M, j is more than or equal to 1 and is less than or equal to N, and N = L B /Δd，M＝L W /Δd。
4. The method for obtaining the wear profile of the upper working roll as claimed in claim 1, wherein the step of obtaining the second wear amount of the lower working roll at the target roll gap point in the current roll shifting state based on the wear profile of the upper working roll comprises the steps of:
sequentially dividing the lower working rolls based on the first preset interval along the axial direction to obtain M lower mark points, wherein M is a positive integer;
acquiring a lower mark point corresponding to the target roll gap point of the lower working roll in the current roll shifting state as a lower target mark point;
and acquiring a second abrasion loss of the lower working roll at the lower target marking point based on the abrasion distribution curve of the lower working roll.
5. The method for acquiring as the lower target mark point, the lower mark point corresponding to the target roll gap point of the lower work roll in the current roll shifting state according to claim 4, comprising:
taking the jth roll gap point as the target roll gap point, and based on the following equation
Acquiring an ith lower mark point corresponding to the jth roll gap point of the lower working roll in the current roll shifting state, and taking the ith lower mark point as the lower target mark point, wherein,
L W is the length of the working roll, L B Taking the length of the supporting roller, S is the roll shifting amount of the working roller, delta d is the first preset interval, i and j are positive integers, i is more than or equal to 1 and is less than or equal to M, j is more than or equal to 1 and is less than or equal to N, and N = L B /Δd，M＝L W /Δd。
6. The method of claim 1, wherein obtaining a maximum partial wear total and a minimum partial wear total in an edge wear zone based on the local wear total of the target roll gap region at each of the roll gap points comprises:
taking the total local wear amount of the first roll gap point as the current maximum total local wear amount, sequentially judging whether the total local wear amount of the j-th roll gap point is larger than the current maximum total local wear amount, if so, updating the current maximum total local wear amount by using the total local wear amount of the j-th roll gap point, sequentially taking the j as a positive integer from 1 to Z, and taking the current maximum total local wear amount as the maximum total local wear amount positioned in the edge wear area until the j is taken as Z;
using the maximum local wear total amount as the current minimum local wear total amount, sequentially judging whether the local wear total amount of the jth roll gap point is smaller than the current minimum local wear total amount, if so, updating the current minimum local wear total amount by using the local wear total amount of the jth roll gap point, sequentially taking the j as a positive integer from 1 to Z, and using the current minimum local wear total amount as the minimum local wear total amount positioned in the edge wear area until the j is taken as Z,
L P width, L, of strip to be rolled by said working rolls B Is the length of the backup roll, L E And the second preset distance is set.
7. The method of claim 1, wherein the obtaining the degree of wear of the work roll in the current roll-shifting state based on the maximum and minimum total partial wear amounts comprises:
setting a grading gradient delta G;
based on the following equation
Obtaining the abrasion degree of the working roll in the current roll shifting state, wherein C is the abrasion degree of the working roll, delta G is the grading gradient, G is max For said maximum total local wear, G min Is the minimum total local wear.
8. An apparatus for obtaining a degree of wear of a high-speed steel work roll, which is used in a roll of a hot finishing mill, the roll comprising: the working roll comprises an upper working roll and a lower working roll, the roll gap area corresponding to the supporting roll is a target roll gap area, and the acquiring device comprises:
the dividing module is used for sequentially dividing the target roll gap area based on a first preset interval along the axial direction to obtain N roll gap points, wherein N is a positive integer;
the first acquisition module is used for acquiring a first abrasion loss of the upper working roll at a target roll gap point under the current roll shifting state on the basis of the abrasion distribution curve of the upper working roll, wherein the target roll gap point is any one of the N roll gap points;
the second acquisition module is used for acquiring a second abrasion loss of the lower working roll at the target roll gap point under the current roll shifting state based on the abrasion distribution curve of the lower working roll;
a first obtaining module, configured to obtain a total local wear amount of the target roll gap region at the target roll gap point in the current roll shifting state based on a sum of the first wear amount and the second wear amount;
the obtaining module is used for obtaining the maximum local wear total amount and the minimum local wear total amount which are positioned in an edge wear area on the basis of the local wear total amount of the target roll gap area at each roll gap point, wherein the edge wear area is an area between the edge of the target roll gap area and a preset position, and the preset position is a position on the target roll gap area and at a second preset distance from the edge of the target roll gap area;
and the second obtaining module is used for obtaining the wear degree of the working roll in the current roll shifting state based on the maximum local wear total amount and the minimum local wear total amount.
9. 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 1-7.
10. A computer-readable storage medium having stored thereon a computer program comprising: which program, when being executed by a processor, is adapted to carry out the method steps of any of claims 1-7.
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