CN115608794A - Thickness measuring method, roller press control method and device and roller press control system - Google Patents

Thickness measuring method, roller press control method and device and roller press control system Download PDF

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CN115608794A
CN115608794A CN202211183360.0A CN202211183360A CN115608794A CN 115608794 A CN115608794 A CN 115608794A CN 202211183360 A CN202211183360 A CN 202211183360A CN 115608794 A CN115608794 A CN 115608794A
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roller
distance
rolling
thickness
force
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请求不公布姓名
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Shanghai Pioneer Huineng Technology Co ltd
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Shanghai Pioneer Huineng Technology Co ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/04—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring thickness, width, diameter or other transverse dimensions of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/165—Control of thickness, width, diameter or other transverse dimensions responsive mainly to the measured thickness of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B38/08—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product for measuring roll-force
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B38/00—Methods or devices for measuring, detecting or monitoring specially adapted for metal-rolling mills, e.g. position detection, inspection of the product
    • B21B2038/004—Measuring scale thickness

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Metal Rolling (AREA)

Abstract

The application relates to a thickness measuring method, a roller press control device and a roller press control system. The thickness measuring method includes: acquiring average radial circular runout of the upper roller and the lower roller, a roller size parameter, a roller material characteristic parameter and a total distance between the first distance meter and the second distance meter; collecting rolling force and roll bending force in the process of rolling materials, first distances between a first distance meter and an upper roller at a plurality of positions in the axial direction of a roller shaft, and second distances between a second distance meter and a lower roller at a plurality of positions in the axial direction of the roller shaft; calculating the average thickness of the upper roller and the lower roller according to the rolling force, the roll bending force, the average radial circular run-out, the size parameter of the roller and the characteristic parameter of the roller material; and calculating the real-time thickness of the rolled material according to the total distance, the first distance, the second distance and the respective average thickness of the upper roller and the lower roller. By the aid of the method and the device, timely detection of the thickness of the rolled material can be achieved, and the precision of thickness adjustment is improved.

Description

Thickness measuring method, roller press control method and device and roller press control system
Technical Field
The application relates to the technical field of mechanical automation, in particular to a thickness measuring method, a roller press control device and a roller press control system.
Background
The rolling procedure is a production process section for performing rolling treatment on materials by adopting a rolling machine, and is a common procedure in automatic production; for example, the pole piece may be subjected to a roll process after being coated and dried. The current roll squeezer on the market generally comprises an upper press roll, a lower press roll and a bending cylinder designed at the tail ends of the upper press roll and the lower press roll; the materials pass between the upper press roll and the lower press roll to realize rolling, and the rolling force acted by the upper press roll and the lower press roll and the roller bending force acted by the bending cylinder are controlled by the control device.
In order to ensure the rolling effect, the thickness of the rolled material needs to be controlled. The traditional control mode is that a thickness gauge is arranged at the rear section of the rolling procedure, the thickness of the rolled material is measured by the thickness gauge, the thickness of the rolled material is fed back to a control device, and the rolling force and the roll bending force are adjusted by the control device, so that the thickness of the later section to be rolled is adjusted. The control mode can not measure the thickness of the material in the rolling process, and the adjustment of the thickness of the section to be rolled by using the rolled thickness has a long time lag, so that the adjustment precision of the thickness is reduced.
Disclosure of Invention
In view of the above, it is necessary to provide a thickness measuring method, a roll squeezer control device, and a roll squeezer control system, which can measure the thickness in real time and improve the thickness adjustment accuracy.
A thickness measurement method, comprising:
acquiring average radial circular runout of an upper roller and a lower roller of a roller press, acquiring roller size parameters and roller material characteristic parameters of the upper roller and the lower roller, and acquiring the total distance between a first distance meter and a second distance meter in a rolling thickness direction; the first distance meter is arranged on one side, away from the lower roller, of the upper roller, and the second distance meter is arranged on one side, away from the upper roller, of the lower roller;
collecting rolling force and bending force of the rolling machine in the process of rolling materials, and first distances between the first distance measuring instrument and the upper roller at a plurality of positions in the axial direction of the roller, and second distances between the second distance measuring instrument and the lower roller at a plurality of positions in the axial direction of the roller;
calculating the average thickness of the upper roller and the lower roller in the rolling thickness direction according to the rolling force, the roll bending force, the average radial circular runout of the upper roller and the lower roller, the roller size parameters of the upper roller and the lower roller and the roller material characteristic parameters;
and calculating the real-time thickness of the rolled material according to the total distance, the first distance, the second distance, the average thickness of the upper roller and the average thickness of the lower roller in the rolling thickness direction.
A method of controlling a roller press, comprising:
calculating the difference between the real-time thickness obtained by the thickness measuring method and a preset target thickness;
and adjusting the rolling force and the roll bending force of the rolling machine based on the difference value.
A thickness measurement device, comprising:
the data acquisition module is used for acquiring the average radial circular runout of an upper roller and a lower roller of the roller press, and acquiring roller size parameters and roller material characteristic parameters of the upper roller and the lower roller as well as the total distance between the first distance meter and the second distance meter in the rolling thickness direction; the first distance meter is arranged on one side, away from the lower roller, of the upper roller, and the second distance meter is arranged on one side, away from the upper roller, of the lower roller;
the data acquisition module is used for acquiring rolling force and bending force in the process that the roller press rolls materials, as well as first distances between the first distance measuring instruments and the upper roller at a plurality of positions in the axial direction of the roller wheel and second distances between the second distance measuring instruments and the lower roller at a plurality of positions in the axial direction of the roller wheel;
a roller thickness calculating module, configured to calculate, according to the rolling force, the roll bending force, average radial run-out of the upper roller and the lower roller, roller size parameters of the upper roller and the lower roller, and roller material characteristic parameters, average thicknesses of the upper roller and the lower roller in the rolling thickness direction;
and the real-time thickness calculating module is used for calculating the real-time thickness of the rolled material according to the total distance, the first distance, the second distance, the average thickness of the upper roller wheel and the average thickness of the lower roller wheel in the rolling thickness direction.
A roller press control device comprising:
the difference value calculating module is used for calculating the difference value between the real-time thickness obtained by the thickness measuring device and a preset target thickness;
and the force adjusting module is used for adjusting the rolling force and the roll bending force of the rolling machine based on the difference value.
A roller press control system comprising:
the first distance measuring instrument is arranged on one side, away from the lower roller, of the upper roller of the roller press;
the second distance meter is arranged on one side, away from the upper roller, of the lower roller;
the force measuring device is arranged on the roller press and used for measuring the rolling force and the roll bending force in the process that the roller press rolls materials;
the controller is connected with the first distance measuring instrument, the second distance measuring instrument, the force measuring device and the roller press; the controller comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the steps of the roller press control method when executing the computer program.
According to the thickness measuring method, the roller press control method, the device and the roller press control system, the average thickness of each of the upper roller and the lower roller in the rolling thickness direction is calculated according to the obtained average radial circular runout of the upper roller and the lower roller, the roller size parameters and the roller material characteristic parameters of the upper roller and the lower roller, and the rolling force and the roller bending force collected in the rolling process, and then the real-time thickness of the rolled material is calculated through the total distance between the first distance meter and the second distance meter, the first distance between the first distance meter and the upper roller, the second distance between the second distance meter and the lower roller, and the average thickness of each of the upper roller and the lower roller, so that the timely detection of the thickness of the rolled material in the rolling process can be realized. Therefore, the rolling force and the roll bending force are adjusted based on the real-time thickness, so that the rolled thickness is adjusted in real time, errors caused by hysteresis can be avoided, the thickness adjusting precision is improved, and the consistency of the rolled material thickness is ensured.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the conventional technologies of the present application, the drawings used in the descriptions of the embodiments or the conventional technologies will be briefly introduced below, it is obvious that the drawings in the following descriptions are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow chart diagram of a thickness measurement method in one embodiment;
FIG. 2 is a schematic thickness diagram of the material in one embodiment;
FIG. 3 is a schematic flow chart of a method for controlling a roller press according to one embodiment;
FIG. 4 is a schematic diagram of the operation of adjusting the rolling and bending forces in one embodiment;
FIG. 5 is a block diagram of a thickness measuring device according to an embodiment;
FIG. 6 is a block diagram showing the structure of a roller press control device in one embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
It will be understood that, as used herein, the terms "first," "second," and the like may be used herein to describe various elements, but these elements should not be limited by these terms. These terms are only used to distinguish one element from another.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or be connected to the other element through intervening elements. Further, "connection" in the following embodiments is understood to mean "electrical connection", "communication connection", or the like, if there is a transfer of electrical signals or data between the connected objects.
As used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises/comprising," "includes" or "including," etc., specify the presence of stated features, integers, steps, operations, components, parts, or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.
In one embodiment, a thickness measurement method is provided that can be used to measure the thickness of a rolled material in a roller press. As shown in fig. 1, the method comprises the steps of:
s110: the average radial circular runout of an upper roller and a lower roller of the roller press is obtained, the roller size parameters and the roller material characteristic parameters of the upper roller and the lower roller are obtained, and the total distance between the first distance meter and the second distance meter in the rolling thickness direction is obtained.
The upper press roll of the roller press comprises an upper roll wheel and an upper roll shaft (refer to 60 in figure 2), the lower press roll of the roller press comprises a lower roll wheel and a lower roll shaft (refer to 61 in figure 2), and the upper roll wheel and the lower roll wheel are respectively arranged on the upper roll shaft and the lower roll shaft and are connected with the roll gap adjusting system; the middle of the upper roller and the lower roller is provided with a rolled material, for example, the material can be a battery pole piece.
The size parameter of the roller is a parameter for representing the size of the roller, and can be the diameter of the roller or the radius of the roller. The roll size parameter and the roll material characteristic parameter may be obtained by data input by a user. Specifically, the average radial circular run-out of the upper roller, the roller size parameter of the upper roller, and the roller material characteristic parameter of the upper roller are obtained, and the average radial circular run-out of the lower roller, the roller size parameter of the lower roller, and the roller material characteristic parameter of the lower roller are obtained.
Wherein, the rolling thickness direction is the direction corresponding to the thickness of the materials rolled by the rolling machine. The total distance between the first distance meter and the second distance meter in the rolling thickness direction refers to the distance between the measuring point of the first distance meter and the measuring point of the second distance meter in the rolling thickness direction. Wherein, first distancer sets up in the one side that the top roll deviates from the bottom roll wheel, and second distancer sets up in the one side that the bottom roll wheel deviates from the top roll wheel.
S130: the method comprises the steps of collecting rolling force and roller bending force of a roller press in the process of rolling materials, and first distances between a first distance meter and an upper roller at a plurality of positions in the axial direction of a roller shaft and second distances between a second distance meter and a lower roller at a plurality of positions in the axial direction of the roller shaft.
The rolling force and the roll bending force can be measured by a force measuring device; for example, the force measuring device may employ a pressure sensor, which is provided on a hydraulic line of the roll press to measure the rolling force, and a pressure sensor provided at a corresponding position of a bending cylinder part of the roll press to measure the bending force.
Wherein, the axial direction of the roller is the axial direction of the roller. In the process that the roller press rolls materials, the first distance meter and the second distance meter move in the axial direction of the roller wheel, the first distance meter measures the distance between the first distance meter and the surface of the upper roller wheel to obtain a first distance, and the second distance meter measures the distance between the second distance meter and the surface of the lower roller wheel to obtain a second distance. For example, with the roller axial direction as the x-axis direction, before the upper roller and the lower roller roll the pole piece, the first distance meter and the second distance meter are moved to be close to x = 0; then, start to start running roller and lower running roller roll-in pole piece, first distancer and second distancer are along the at the uniform velocity horizontal migration of x axle direction, and simultaneously, the distance between the first distancer of upper roll upper surface of a plurality of positions department is gathered to first distancer, and the distance between the second distancer of lower running roller lower surface of a plurality of positions department is gathered to the second distancer. Wherein, go up the running roller upper surface and refer to the side surface that the running roller faced first distancer down, the running roller lower surface refers to the side surface that the running roller faced the second distancer down.
S150: and calculating the average thickness of each of the upper roller and the lower roller in the rolling thickness direction according to the rolling force, the bending force, the average radial circular runout of the upper roller and the lower roller, the roller size parameters of the upper roller and the lower roller and the roller material characteristic parameters.
Specifically, the average thickness of the upper roller in the rolling thickness direction is calculated according to the rolling force, the roll bending force, the average radial circular runout of the upper roller, the roller size parameter of the upper roller and the roller material characteristic parameter. And calculating the average thickness of the lower roller in the rolling thickness direction according to the rolling force, the roll bending force, the average radial circular run-out of the lower roller, the roller size parameter of the lower roller and the roller material characteristic parameter.
S170: and calculating the real-time thickness of the rolled material according to the total distance, the first distance, the second distance, the average thickness of the upper roller and the average thickness of the lower roller in the rolling thickness direction.
The traditional roll squeezer detects the thickness of a rolled pole piece, cannot obtain the thickness of the pole piece in real time during rolling, and adjusts the thickness of a section to be rolled for a long time based on the rolled thickness. According to the thickness measuring method, the average radial circular runout of the upper roller wheel and the lower roller wheel, the roller size parameters of the upper roller wheel and the lower roller wheel, the roller material characteristic parameters and the rolling force and the bending force acquired in the rolling process are used for calculating the average thickness of the upper roller wheel and the lower roller wheel in the rolling thickness direction respectively, then the real-time thickness of the rolled material is calculated through the total distance between the first distance meter and the second distance meter, the first distance between the first distance meter and the upper roller wheel, the second distance between the second distance meter and the lower roller wheel and the average thickness of the upper roller wheel and the average thickness of the lower roller wheel respectively, and the timely detection of the thickness of the rolled material in the rolling process can be realized. Therefore, the real-time thickness is applied to the adjustment of the roll force and the roll bending force so as to adjust the rolled thickness in real time, the error caused by hysteresis can be avoided, the thickness adjustment precision is improved, and the consistency of the rolled material thickness is ensured.
In one embodiment, in step S110, the average radial run-out of the upper roller and the lower roller of the roller press is obtained, and the method includes the following steps (a 1) to (a 3).
Step (a 1): when the first distance meter is located at the upward preset position of the roller shaft in the state that the roller press does not apply force, the maximum value and the minimum value of the first distance between the upper roller and the first distance meter in the process of rotating the upper roller for one circle around the roller shaft are collected, and when the second distance meter is located at the upward preset position of the roller shaft, the maximum value and the minimum value of the second distance between the lower roller and the second distance meter in the process of rotating the lower roller for one circle around the roller shaft are collected.
The state of the roller press without applying force refers to the state that no material is arranged between the upper roller and the lower roller and the roller press does not apply rolling force and bending force. Wherein, the preset position is provided with a plurality of. Measuring the maximum value and the minimum value of the distance between the first distance meter and the surface of the upper roller at a plurality of different preset positions in the axial direction of the roller by the first distance meter to respectively obtain the maximum value and the minimum value of the first distance corresponding to each preset position; specifically, when the upper roller rotates for a circle around the roller shaft at a preset position, the first distance meter measures the distance from the surface of the upper roller to the first distance meter in the rotating process, extracts the maximum value and the minimum value, and obtains the maximum value and the minimum value of the first distance corresponding to the preset position. Similarly, the second distance meter measures the maximum value and the minimum value of the distance between the second distance meter and the surface of the lower roller at a plurality of preset positions in the axial direction of the roller to respectively obtain the maximum value and the minimum value of the second distance corresponding to each preset position.
Step (a 2): and respectively calculating the difference value between the first distance maximum value and the first distance minimum value corresponding to each preset position to obtain the radial circular runout of the upper roller at each preset position, and respectively calculating the difference value between the second distance maximum value and the second distance minimum value corresponding to each preset position to obtain the radial circular runout of the lower roller at each preset position.
Step (a 3): and calculating an average value based on the radial circular runout of the upper roller at each preset position to obtain the average radial circular runout of the upper roller, and calculating an average value based on the radial circular runout of the lower roller at each preset position to obtain the average radial circular runout of the lower roller.
By acquiring data under the condition that the roller press does not apply force, the average radial circular run-out of the roller relative to the shaft when the roller is not loaded can be accurately measured.
For example, L 0，i (x) The distance between the upper surface of the upper roller and the first distance meter/the distance between the lower surface of the lower roller and the second distance meter at the position x are shown, wherein i represents the number of the distance meters corresponding to the upper roller and the lower roller, and i =1,2; x represents the position in the roller axial direction, and the position of any side surface of the roller shaft is taken as the origin of an x coordinate, and the direction towards the other side is taken as the positive direction of the x axis. Extracting a maximum L of first and second rangefinder readings at different locations x 0max，i (x) And a minimum value L 0min，i (x) So that the radial circular runout S 'of the upper roller and the lower roller at different preset positions along the axial direction of the rollers can be calculated' 0i (x)＝L 0max，i (x)-L 0min，i (x) In that respect Further, the average radial circular runout of the upper roller and the lower roller can be calculated, and if the average radial circular runout is discrete sampling, the average radial circular runout is calculated
Figure BDA0003866201820000091
j represents the number of the acquisition points of the first distance meter/the second distance meter along the axial direction of the roller, and N represents the number of the acquisition points (the value number of x); if the sampling is continuous sampling, the average radial circular runout is calculated by adopting an integral form
Figure BDA0003866201820000092
In one embodiment, the rolling force comprises an upper rolling force and a lower rolling force, and the bending force comprises an upper bending force and a lower bending force. Wherein, referring to fig. 2, the upper rolling force refers to the rolling force F acted by the upper roller 50 of the rolling machine 1 The upper bending force refers to the bending force F acted by a bending cylinder on the side of an upper roller of the roller press b1 (ii) a The rolling force of the lower roll is lower than that of a rolling machineRolling force F of roller 51 2 The lower bending force refers to the bending force F acted by a bending cylinder at the side of the lower roller of the roller press b2 。
Specifically, step S150 includes: calculating to obtain the average thickness of the upper roller in the rolling thickness direction according to the upper roller rolling force, the upper bending force, the average radial circular runout of the upper roller, the roller size parameter of the upper roller and the roller material characteristic parameter by adopting a stored average thickness model; and calculating the average thickness of the lower roller in the rolling thickness direction by using the stored average thickness model according to the rolling force of the lower roller, the lower bending force, the average radial circular runout of the lower roller, the roller size parameter of the lower roller and the roller material characteristic parameter.
The average thickness model is a pre-input calculation model and represents the relation between the average thickness and rolling force, bending force, average radial circular run-out, roller size parameters and roller material characteristic parameters. By using the inputted average thickness calculation model, the average thickness of the upper roller and the lower roller in the rolling thickness direction during rolling can be calculated quickly.
For example, the roll size parameter is the nominal diameter of the roll; before step S150, specifically before step S110, the different rolling forces F can be calculated by finite element method 1i Bending force F 2i Nominal diameter of roller i Average radial run out
Figure BDA0003866201820000101
The thickness D of the upper roller and the lower roller in the rolling thickness direction at different axial positions of the roller under the characteristic parameters of the roller material v，i (x, t). To simplify the calculation, it is assumed that the nominal diameters of the upper and lower rollers are the same. Subsequently, D is established v，i (x, t) and the above parameters (rolling force F) 1i Bending force F 2i Nominal diameter of the roll D i Average radial run out
Figure BDA0003866201820000102
Roller material property parameters), i.e. mathematical models
Figure BDA0003866201820000103
Therefore, the average thickness of the roller in the rolling thickness direction
Figure BDA0003866201820000104
Or alternatively
Figure BDA0003866201820000105
In particular, the thickness D can be established by machine learning methods (e.g., neural network algorithms, support vector machines) v，i (x, t) and the rolling force F 1i Bending force F 2i Nominal diameter of roller i Average radial run out
Figure BDA0003866201820000106
And (3) establishing a mathematical model by the quantitative relation of the characteristic parameters of the roller material, or establishing the mathematical model by factor analysis, dimension analysis and regression analysis.
In one embodiment, step S170 includes steps (b 1) to (b 3).
Step (b 1): and calculating the surface distance between the upper roller and the lower roller at each position according to the total distance and the first distance and the second distance corresponding to each position.
Step (b 2): and calculating an average value based on the surface distance between the upper roller and the lower roller at each position to obtain an average surface distance.
Step (b 3): and calculating the value obtained by subtracting the average thickness of the upper roller in the rolling thickness direction and the average thickness of the lower roller in the rolling thickness direction from the average surface distance to obtain the real-time thickness of the rolled material.
E.g. H i (x, t) represents the distance between the upper roller and the first distance meter/the lower roller and the second distance meter at different positions (different positions correspond to different moments); referring to fig. 2, the first distance meter 10 collects a distance H 1 (x, t) and the distance collected by the second distance meter 11 is H 2 (x, t), distance between upper surface of upper roller 50 and lower surface of lower roller 51
Figure BDA0003866201820000111
Wherein H 0 Is the total distance. Further, an average surface distance between the upper surface of the upper roller and the lower surface of the lower roller is calculated
Figure BDA0003866201820000112
Or
Figure BDA0003866201820000113
At the average surface distance
Figure BDA0003866201820000114
Average thickness D of upper and lower rollers v，i After the data of (x, t), the real-time thickness h (t) of the material can be calculated by the following formula:
Figure BDA0003866201820000115
therefore, the material thickness can be timely detected in the rolling process.
In one embodiment, there is provided a roll press control method, as shown in fig. 3, including:
s110: the average radial circular runout of an upper roller and a lower roller of the roller press is obtained, the roller size parameters and the roller material characteristic parameters of the upper roller and the lower roller are obtained, and the total distance between the first distance meter and the second distance meter in the rolling thickness direction is obtained.
S130: the method comprises the steps of collecting rolling force and roller bending force of a roller press in the process of rolling materials, and first distances between a first distance meter and an upper roller at a plurality of positions in the axial direction of a roller shaft and second distances between a second distance meter and a lower roller at a plurality of positions in the axial direction of the roller shaft.
S150: and calculating the average thickness of each of the upper roller and the lower roller in the rolling thickness direction according to the rolling force, the bending force, the average radial circular runout of the upper roller and the lower roller, the roller size parameters of the upper roller and the lower roller and the roller material characteristic parameters.
S170: and calculating the real-time thickness of the rolled material according to the total distance, the first distance, the second distance, the average thickness of the upper roller and the average thickness of the lower roller in the rolling thickness direction.
S310: and calculating a difference value between the real-time thickness and a preset target thickness, and adjusting the rolling force and the roll bending force of the rolling machine based on the difference value.
Specifically, the rolling force and the roll bending force of the rolling machine are adjusted by taking the real-time thickness close to the target thickness as a target. For example, taking a material as a pole piece, the real-time thickness h (t) of the pole piece and the designed target thickness h are compared 0 Difference of (Δ h = h (t) -h) 0 ) The roll force and the roll bending force are adjusted as feedback, and the thickness of the real-time rolled pole piece is continuously adjusted, so that the real-time thickness of the rolled pole piece is ensured to be close to the designed target thickness h 0 。
The roll squeezer control method is based on the real-time thickness obtained by the thickness measurement method in the previous embodiments. In a detailed embodiment, the working principle diagram for adjusting the rolling force and the bending force is shown in fig. 4, a pole piece 4 is arranged between an upper roller 50 and a lower roller 51, a first distance meter 10 is installed on a first guide rail 30, a second distance meter 11 is installed on a second guide rail 31, and the distance from the surface of the roller to the distance meters at different positions is measured by moving on the guide rails; the first pressure sensor 20 measures the upper roll rolling force or the upper roll bending force, and the second pressure sensor 21 measures the lower roll rolling force or the lower roll bending force; the measuring of the highest point position of the roller at different moments is that the first distance meter 10/the second distance meter 11 measure the distance to the surface of the roller.
The traditional roll squeezer detects the thickness of a rolled pole piece, cannot obtain the thickness of the pole piece in real time during rolling, and adjusts the thickness of a section to be rolled for a long time based on the rolled thickness. According to the roll squeezer control method, the roll force and the roll bending force are adjusted according to the real-time thickness obtained through calculation, so that the rolled thickness is adjusted in real time, errors caused by hysteresis can be avoided, the thickness adjusting precision is improved, and the consistency of the thickness of the rolled material is ensured.
It should be understood that, although the steps in the flowcharts of fig. 1 and 3 are shown in sequence as indicated by the arrows, the steps are not necessarily performed in sequence as indicated by the arrows. The steps are not performed in the exact order shown and described, and may be performed in other orders, unless explicitly stated otherwise. Moreover, at least a part of the steps in fig. 1 and 3 may include multiple steps or multiple stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of performing the steps or stages is not necessarily sequential, but may be performed alternately or alternately with other steps or at least a part of the steps or stages in other steps.
It will be understood by those skilled in the art that all or part of the processes of the methods of the embodiments described above may be implemented by hardware instructions of a computer program, which may be stored in a non-volatile computer-readable storage medium, and when executed, may include the processes of the embodiments of the methods described above. Any reference to memory, storage, database or other medium used in the embodiments provided herein can include at least one of non-volatile and volatile memory. Non-volatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical storage, or the like. Volatile Memory can include Random Access Memory (RAM) or external cache Memory. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM), for example.
In one embodiment, as shown in fig. 5, there is provided a thickness measuring apparatus including: data acquisition module 510, data acquisition module 530, roll thickness calculation module 550 and real-time thickness calculation module 570, wherein:
the data acquisition module 510 is configured to acquire average radial circular runout of an upper roller and a lower roller of the roller press, and acquire roller size parameters and roller material characteristic parameters of the upper roller and the lower roller, and a total distance between the first distance meter and the second distance meter in the rolling thickness direction; wherein, first distancer sets up in the one side that the top roll deviates from the bottom roll, and second distancer sets up in the one side that the bottom roll deviates from the top roll.
The data acquisition module 530 is used for acquiring rolling force and bending force of the roller press in the process of rolling the material, as well as a first distance between the first distance meter and the upper roller at a plurality of positions in the axial direction of the roller, and a second distance between the second distance meter and the lower roller at a plurality of positions in the axial direction of the roller.
The roll thickness calculating module 550 is configured to calculate an average thickness of each of the upper roll and the lower roll in the rolling thickness direction according to the rolling force, the bending force, the average radial run-out of the upper roll and the lower roll, the roll size parameters of the upper roll and the lower roll, and the roll material characteristic parameters.
The real-time thickness calculating module 570 is configured to calculate a real-time thickness of the rolled material according to the total distance, the first distance, the second distance, and an average thickness of each of the upper roller and the lower roller in the rolling thickness direction.
The thickness measuring device calculates the average thickness of the upper roller and the lower roller in the rolling thickness direction according to the obtained average radial circular runout of the upper roller and the lower roller, the roller size parameters and the roller material characteristic parameters of the upper roller and the lower roller and the roller force and the roller bending force acquired in the rolling process, then, the real-time thickness of the rolled material is calculated through the total distance between the first distance meter and the second distance meter, the first distance between the first distance meter and the upper roller, the second distance between the second distance meter and the lower roller and the respective average thickness of the upper roller and the lower roller, and the timely detection of the thickness of the rolled material in the rolling process can be realized. Therefore, the real-time thickness is applied to the adjustment of the roll force and the roll bending force so as to adjust the rolled thickness in real time, the error caused by hysteresis can be avoided, the thickness adjustment precision is improved, and the consistency of the rolled material thickness is ensured.
In one embodiment, as shown in fig. 6, there is provided a roll press control apparatus including: data acquisition module 510, data acquisition module 530, roll thickness calculation module 550, real-time thickness calculation module 570, difference calculation module 610 and force adjustment module 630, wherein:
the data acquisition module 510 is configured to acquire average radial circular runout of an upper roller and a lower roller of the roller press, and acquire roller size parameters and roller material characteristic parameters of the upper roller and the lower roller, and a total distance between the first distance meter and the second distance meter in the rolling thickness direction; wherein, first distancer sets up in the one side that the top roll deviates from the bottom roll wheel, and second distancer sets up in the one side that the bottom roll wheel deviates from the top roll wheel.
The data acquisition module 530 is used for acquiring rolling force and bending force of the roller press in the process of rolling the material, as well as a first distance between the first distance meter and the upper roller at a plurality of positions in the axial direction of the roller, and a second distance between the second distance meter and the lower roller at a plurality of positions in the axial direction of the roller.
The roll thickness calculating module 550 is configured to calculate an average thickness of each of the upper roll and the lower roll in the rolling thickness direction according to the rolling force, the bending force, the average radial run-out of the upper roll and the lower roll, the roll size parameters of the upper roll and the lower roll, and the roll material characteristic parameters.
The real-time thickness calculating module 570 is configured to calculate a real-time thickness of the rolled material according to the total distance, the first distance, the second distance, and an average thickness of each of the upper roller and the lower roller in the rolling thickness direction.
The difference calculation module 610 is used for calculating a difference between the real-time thickness and a preset target thickness.
The force adjustment module 630 is used to adjust the roll force and the roll bending force of the roll press based on the difference.
The roller press control device adjusts the rolling force and the roll bending force in real time by adopting the calculated real-time thickness, so that the rolled thickness is adjusted in real time, errors caused by hysteresis can be avoided, the thickness adjusting precision is improved, and the consistency of the rolled material thickness is ensured.
For the specific definition of the thickness measuring device, reference may be made to the definition of the thickness measuring method above, and for the specific definition of the roller press control device, reference may be made to the definition of the roller press control method above, which is not described herein again. The various modules in the thickness measuring device/roll press control device described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
In one embodiment, there is provided a roller press control system comprising a first range finder, a second range finder, a force measuring device and a controller, wherein:
the first distance measuring instrument is arranged on one side, away from the lower roller, of the upper roller of the roller press; the second distancer sets up in the one side that the running roller deviates from the top roll wheel down.
The force measuring device is arranged on the roller press and used for measuring the rolling force and the roll bending force of the roller press in the process of rolling the material.
The controller is connected with the first distance meter, the second distance meter, the force measuring device and the roller press; the controller comprises a memory and a processor, the memory stores computer programs, and the processor realizes the steps of the roller press control method in each embodiment when executing the computer programs.
The rolling machine control system adopts the controller capable of realizing the rolling machine control method, and similarly, the rolling thickness of the rolling machine can be adjusted in real time, errors caused by hysteresis are avoided, and the thickness adjusting precision is high.
In one embodiment, the roller press control system further comprises a first moving mechanism and a second moving mechanism, the first moving mechanism is disposed on a side of the upper roller away from the lower roller, the second moving mechanism is disposed on a side of the lower roller away from the upper roller, the first distance meter is mounted on the first moving mechanism, and the second distance meter is mounted on the second moving mechanism.
The first moving mechanism drives the first distance measuring instrument to move in the axial direction of the roller wheel, so that the first distance measuring instrument can measure the distance between the first distance measuring instrument and the surface of the upper roller wheel at a plurality of positions in the axial direction of the roller wheel. The second moving mechanism drives the second distance measuring instrument to move in the axial direction of the roller wheel, so that the second distance measuring instrument can measure the distance between the second distance measuring instrument and the surface of the lower roller wheel at a plurality of positions in the axial direction of the roller wheel. Thus, multi-position mobile ranging can be achieved. For example, as shown in fig. 4, the first moving mechanism and the second moving mechanism may be guide rails.
In one embodiment, the rolling force comprises an upper rolling force and a lower rolling force, and the bending force comprises an upper bending force and a lower bending force; the force measuring device comprises a first rolling force measuring instrument, a first roll bending force measuring instrument, a second rolling force measuring instrument and a second roll bending force measuring instrument. The first roll force measuring instrument is used for measuring the upper roll force, the first bending force measuring instrument is used for measuring the upper bending force, the second roll force measuring instrument is used for measuring the lower roll force, and the second bending force measuring instrument is used for measuring the lower bending force.
Specifically, the first rolling force measuring instrument, the first bending force measuring instrument, the second rolling force measuring instrument and the second bending force measuring instrument may be pressure sensors, and the pressure sensors are connected with the rolling machine assembly and used for measuring the rolling force and the bending force. For example, a first rolling force gauge and a second rolling force gauge may be provided on a hydraulic line of the rolling machine to measure the upper rolling force and the lower rolling force, respectively.
In the description herein, references to "some embodiments," "other embodiments," "desired embodiments," or the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, a schematic description of the above terminology may not necessarily refer to the same embodiment or example.
The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is specific and detailed, but not to be understood as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, and these are all within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. A method of measuring thickness, comprising:
acquiring average radial circular runout of an upper roller and a lower roller of a roller press, acquiring roller size parameters and roller material characteristic parameters of the upper roller and the lower roller, and a total distance between a first distance meter and a second distance meter in a rolling thickness direction; the first distance meter is arranged on one side, away from the lower roller, of the upper roller, and the second distance meter is arranged on one side, away from the upper roller, of the lower roller;
collecting rolling force and bending force of the rolling machine in the process of rolling materials, as well as first distances between the first distance measuring instrument and the upper roller at a plurality of positions in the axial direction of the roller wheel and second distances between the second distance measuring instrument and the lower roller at a plurality of positions in the axial direction of the roller wheel;
calculating the average thickness of the upper roller and the lower roller in the rolling thickness direction according to the rolling force, the roll bending force, the average radial circular runout of the upper roller and the lower roller, the roller size parameters of the upper roller and the lower roller and the roller material characteristic parameters;
and calculating the real-time thickness of the rolled material according to the total distance, the first distance, the second distance, the average thickness of the upper roller and the average thickness of the lower roller in the rolling thickness direction.
2. The method of claim 1, wherein obtaining the average radial run out of the upper and lower rollers of the roller press comprises:
when the roller press is not in a force application state, when the first distance meter is located at a preset position in the axial direction of the roller shaft, acquiring a maximum value and a minimum value of a first distance between the upper roller and the first distance meter in the process that the upper roller rotates around the roller shaft for one circle, and when the second distance meter is located at the preset position in the axial direction of the roller shaft, acquiring a maximum value and a minimum value of a second distance between the lower roller and the second distance meter in the process that the lower roller rotates around the roller shaft for one circle; wherein, the preset positions are multiple;
respectively calculating the difference value between the first distance maximum value and the first distance minimum value corresponding to each preset position to obtain the radial circular runout of the upper roller wheel at each preset position, and respectively calculating the difference value between the second distance maximum value and the second distance minimum value corresponding to each preset position to obtain the radial circular runout of the lower roller wheel at each preset position;
and calculating an average value based on the radial circular runout of the upper roller at each preset position to obtain the average radial circular runout of the upper roller, and calculating an average value based on the radial circular runout of the lower roller at each preset position to obtain the average radial circular runout of the lower roller.
3. The method of claim 1, wherein the rolling force comprises an upper rolling force and a lower rolling force, and the bending force comprises an upper bending force and a lower bending force; calculating the average thickness of the upper roller and the lower roller in the rolling thickness direction according to the rolling force, the bending force, the average radial circular runout of the upper roller and the lower roller, the roller size parameters of the upper roller and the lower roller and the roller material characteristic parameters, and the method comprises the following steps:
calculating to obtain the average thickness of the upper roller in the rolling thickness direction according to the upper roller rolling force, the upper bending force, the average radial circular runout of the upper roller, the roller size parameter of the upper roller and the roller material characteristic parameter by adopting a stored average thickness model;
and calculating to obtain the average thickness of the lower roller in the rolling thickness direction by adopting a stored average thickness model according to the lower roller rolling force, the lower bending force, the average radial circular runout of the lower roller, the roller size parameter of the lower roller and the roller material characteristic parameter.
4. The method of claim 1, wherein said calculating a real-time thickness of the rolled material from the total distance, the first distance, the second distance, the average thickness of each of the upper roller and the lower roller in the rolling thickness direction comprises:
calculating the surface distance between the upper roller and the lower roller at each position according to the total distance and the first distance and the second distance corresponding to each position;
calculating an average value based on the surface distances between the upper roller and the lower roller at each position to obtain an average surface distance;
and calculating the value obtained by subtracting the average thickness of the upper roller in the rolling thickness direction and the average thickness of the lower roller in the rolling thickness direction from the average surface distance to obtain the real-time thickness of the rolled material.
5. A method of controlling a roller press, comprising:
calculating the difference between the real-time thickness obtained by the method according to any one of claims 1 to 4 and a preset target thickness;
and adjusting the rolling force and the roll bending force of the rolling machine based on the difference value.
6. A thickness measuring device, comprising:
the data acquisition module is used for acquiring the average radial circular runout of an upper roller and a lower roller of the roller press, and acquiring the roller size parameters and the roller material characteristic parameters of the upper roller and the lower roller as well as the total distance between the first distance meter and the second distance meter in the rolling thickness direction; the first distance meter is arranged on one side, away from the lower roller, of the upper roller, and the second distance meter is arranged on one side, away from the upper roller, of the lower roller;
the data acquisition module is used for acquiring rolling force and bending force of the rolling machine in the process of rolling materials, first distances between the first distance meter and the upper roller at a plurality of positions in the axial direction of the roller, and second distances between the second distance meter and the lower roller at a plurality of positions in the axial direction of the roller;
a roller thickness calculating module, configured to calculate, according to the rolling force, the roll bending force, average radial run-out of the upper roller and the lower roller, roller size parameters of the upper roller and the lower roller, and roller material characteristic parameters, average thicknesses of the upper roller and the lower roller in the rolling thickness direction;
and the real-time thickness calculating module is used for calculating the real-time thickness of the rolled material according to the total distance, the first distance, the second distance, the average thickness of the upper roller wheel and the average thickness of the lower roller wheel in the rolling thickness direction.
7. A roller press control device, comprising:
a difference calculation module for calculating the difference between the real-time thickness obtained by the apparatus according to claim 6 and a preset target thickness;
and the force adjusting module is used for adjusting the rolling force and the roll bending force of the rolling machine based on the difference value.
8. A roller press control system, comprising:
the first distance measuring instrument is arranged on one side, away from the lower roller, of the upper roller of the roller press;
the second distance measuring instrument is arranged on one side, away from the upper roller, of the lower roller;
the force measuring device is arranged on the roller press and used for measuring the rolling force and the roll bending force in the process that the roller press rolls materials;
the controller is connected with the first distance measuring instrument, the second distance measuring instrument, the force measuring device and the roller press; the controller comprises a memory storing a computer program and a processor implementing the steps of the method of claim 5 when the processor executes the computer program.
9. The roller press control system according to claim 8, further comprising a first moving mechanism and a second moving mechanism, wherein the first moving mechanism is disposed on a side of the upper roller facing away from the lower roller, the second moving mechanism is disposed on a side of the lower roller facing away from the upper roller, the first distance meter is mounted on the first moving mechanism, and the second distance meter is mounted on the second moving mechanism.
10. The roller press control system of claim 8, wherein the force measuring device comprises a first roller force gauge, a first bending force gauge, a second roller force gauge, and a second bending force gauge; the rolling force comprises an upper rolling force and a lower rolling force, and the bending force comprises an upper bending force and a lower bending force;
the first roll force measuring instrument is used for measuring the upper roll force, the second roll force measuring instrument is used for measuring the lower roll force, and the second roll force measuring instrument is used for measuring the lower roll force.
CN202211183360.0A 2022-09-27 2022-09-27 Thickness measuring method, roller press control method and device and roller press control system Pending CN115608794A (en)

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CN202211183360.0A CN115608794A (en) 2022-09-27 2022-09-27 Thickness measuring method, roller press control method and device and roller press control system

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Application Number Priority Date Filing Date Title
CN202211183360.0A CN115608794A (en) 2022-09-27 2022-09-27 Thickness measuring method, roller press control method and device and roller press control system

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CN115608794A true CN115608794A (en) 2023-01-17

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