Roll surface cleaning system

Abstract

The invention provides a roller surface cleaning system. A center console is configured to obtain cleaning parameters of a cleaning device and roller parameters of a roller press; the outer surface of the roller press is preliminarily partitioned according to the cleaning parameters and the roller parameters, a plurality of large cleaning areas which are arranged in the axial direction of the roller press at a time are obtained, and the outer surface of the roller press is completely covered with the large cleaning areas; according to the cleaning parameters and the roller parameters, the large cleaning area is divided in a refined mode, and a plurality of small cleaning areas which are sequentially arranged in the circumferential direction of the roller press and completely cover the large cleaning area are obtained; controlling a galvanometer device to drive a laser to perform small-area cleaning on a small cleaning area in the current large cleaning area; and it is determined that cleaning of the small cleaning area in the current large cleaning area is completed, the driver is controlled to drive the galvanometer device to move to the next large cleaning area, and small area cleaning operation is executed. According to the cleaning device, the driver is controlled to drive the cleaning device to move to the next large cleaning area to clean the next large cleaning area, and cleaning can be completed without shutdown of the roller press.

Description

Technical Field

[0001] The invention belongs to the technical field of lithium battery production, and in particular relates to a roller surface cleaning system. Background Art

[0002] In the production of negative electrodes for lithium batteries, the pole pieces are subjected to a large squeezing force from the rollers when passing through them, which crushes the pole pieces to a certain thickness. The pole pieces will also exert the same reaction force on the rollers. Under the action of the large pressure, the coating on some pole pieces will be transferred to the surface of the rollers. Large particles adhering to the surface of the rollers will leave dents on the pole pieces the next time they contact the pole pieces, causing the pole pieces to be scrapped. If regular point-like defective products flow to the next process to make batteries, lithium deposition will occur in the batteries. Roller sticking occurs during high-speed production, and the abnormality can usually only be discovered when the machine is shut down. Roller sticking will produce a large number of scrapped pole pieces during continuous production.

[0003] At present, the roller press surface is usually cleaned manually by high-frequency manual cleaning with a scraper, or by manual cleaning by friction cleaning with non-woven fabric. However, the rotation speed of the roller press is relatively high, and the manual cleaning method of the roller press requires stopping the machine for cleaning, which cannot meet the needs of on-site production and cannot meet the high-speed non-stop production of the roller press. In addition, the manual cleaning method has the defect of high cost and there is a risk that the cleaning agent is easily left on the electrode. Summary of the invention

[0004] The main purpose of the present invention is to provide a roller surface cleaning system, aiming to solve the technical problem that the cleaning of the roller press in the prior art cannot meet the requirements of high-speed non-stop production.

[0005] In order to achieve the above object, the present invention provides a roller surface cleaning system for cleaning a roller press, the roller surface cleaning system comprising:

[0006] A cleaning device, comprising a galvanometer, a driver connected to the galvanometer, and a laser, wherein the driver is used to drive the galvanometer to move along a large cleaning area, the galvanometer is used to drive the laser to move in a small cleaning area, and the laser is used to emit a dust removal laser to the roller press;

[0007] The center console, the galvanometer and the driver are electrically connected to the center console, and the center console is configured as follows:

[0008] Acquiring cleaning parameters of the cleaning device and roller parameters of the roller press;

[0009] Preliminarily partitioning the outer surface of the roller press according to the cleaning parameters and the roller parameters to obtain a plurality of large cleaning areas arranged along the axial direction of the roller press, and the plurality of large cleaning areas completely cover the outer surface of the roller press;

[0010] The large cleaning area is subdivided into zones according to the cleaning parameters and the roller parameters to obtain a plurality of small cleaning areas which are sequentially arranged along the circumference of the roller press and completely cover the large cleaning area;

[0011] Controlling the galvanometer to drive the laser to perform small area cleaning on the small cleaning area within the current large cleaning area;

[0012] It is determined that the cleaning of the small cleaning area within the current large cleaning area is completed, and the driver is controlled to drive the galvanometer to move to the next large cleaning area and perform a small area cleaning operation.

[0013] In an embodiment of the present invention, the central console is configured to control the galvanometer to drive the laser to perform small area cleaning on the small cleaning area within the current large cleaning area, including:

[0014] Acquiring a first driving speed of the galvanometer, a spot area of ​​the laser, and a rotation speed of the roller press;

[0015] The laser scanning width of the galvanometer and the single frame period of the movement of the galvanometer along the single small cleaning area are obtained according to the first driving speed, the spot area and the rotation speed, so that the movement trajectory of the laser completely covers the single small cleaning area within the single frame period.

[0016] In an embodiment of the present invention, the central console is configured to control the galvanometer to drive the laser to perform small area cleaning on the small cleaning area within the current large cleaning area, and further includes:

[0017] Controlling the galvanometer to drive the laser to reciprocate along the axial direction of the roller press;

[0018] Determine that the small cleaning area within the current large cleaning area has not been cleaned, and obtain the residence time;

[0019] The driver is controlled to stop driving during the dwell time.

[0020] In an embodiment of the present invention, the central console is configured such that obtaining the dwell time includes:

[0021] Acquire the number of partitions of the small cleaning area and a single frame cycle of the galvanometer moving along a single small cleaning area;

[0022] The residence time of the driver in a single large cleaning area is calculated according to the number of partitions and the single-width cycle.

[0023] In the embodiment of the present invention, the single frame period of the movement of the galvanometer along a single small cleaning area is calculated according to the following formula:

[0024] t = πD / v1;

[0025] t is a single frame period of the galvanometer moving along a single small cleaning area;

[0026] D is the roller diameter of the roller press;

[0027] v1 is the rotation speed of the roller press.

[0028] In an embodiment of the present invention, the number of partitions of the small cleaning area is calculated according to the following formula:

[0029] N4=d / (N-1);

[0030] N4 is the number of partitions in the small cleaning area;

[0031] d is the preset width of the large cleaning area;

[0032] N is the laser scanning width of the laser 12 .

[0033] In the embodiment of the present invention, the laser scanning width of the galvanometer is calculated according to the following formula:

[0034] N = v2*n / 2v1;

[0035] v2 is the first driving speed of the galvanometer;

[0036] v1 is the rotation speed of the roller press;

[0037] N is the laser scanning width of the laser;

[0038] n*n is the spot area of ​​the laser.

[0039] In an embodiment of the present invention, the central console is further configured as:

[0040] When it is determined that the roller press is started, obtaining a rate of change of the rotation speed of the roller press within a preset time period;

[0041] When it is determined that the change rate exceeds a preset change range, shutting down the cleaning device;

[0042] When it is determined that the change rate does not exceed a preset change range, the cleaning device is started.

[0043] In an embodiment of the present invention, the cleaning device also includes a dust hood, a dust removal pipe and a dust collector which are connected in sequence, the dust hood is connected to the driver, the dust hood is used to completely cover the laser landing point of the laser, and the dust collector is used to collect dust through the dust removal pipe.

[0044] In an embodiment of the present invention, the roller press includes two rollers, the two cleaning devices and the two rollers are arranged in a one-to-one correspondence, and the two cleaning devices are arranged radially opposite to each other relative to the roller press, and the roller surface cleaning system also includes a scraper mechanism for scraping dust from the surface of the roller press, the two scraper mechanisms are located between the two cleaning devices, and the two scraper mechanisms and the two rollers are arranged in a one-to-one correspondence.

[0045] Through the above technical solution, the roller surface cleaning system provided by the embodiment of the present invention has the following beneficial effects:

[0046] When the roller surface cleaning system is used to clean the roller surface of the roller press, the cleaning parameters of the cleaning device and the roller parameters of the roller press can be obtained through the central console; the outer surface of the roller press is preliminarily partitioned according to the cleaning parameters and the roller parameters to obtain a plurality of large cleaning areas arranged once along the axial direction of the roller press, and the plurality of large cleaning areas completely cover the outer surface of the roller press; the large cleaning areas are refined and partitioned according to the cleaning parameters and the roller parameters to obtain a plurality of large cleaning areas arranged in sequence along the circumference of the roller press and completely covering the large cleaning areas Small cleaning areas covered; preliminary zoning and detailed zoning are performed according to the specific parameters of the galvanometer and the roller press. When the roller press rotates, the central console can control the cleaning device to clean the small cleaning areas in multiple large cleaning areas in sequence along the axial direction. The dust removal laser can effectively clean the pollutants on the roller surface. The roller wiping effect is good, and no manual cleaning is required. The roller press can achieve 24-hour high-speed production without stopping the roller wiping, improve the equipment OEE, and avoid the output of batches of defective pole pieces. At the same time, after one-time investment, no other auxiliary materials need to be continuously invested, and the operation and maintenance cost is low, and maintenance is simple. In the present invention, after the roller surface of the roller press is initially divided into zones, the zones are further refined in the large cleaning area, so that the galvanometer moves along the axial direction of the roller press, and cooperates with the rotation of the roller press, so that the cleaning device can effectively clean the small cleaning area. After the cleaning of multiple small cleaning areas in the current large cleaning area is completed, the central console can control the driver to drive the cleaning device to move to the next large cleaning area to clean the next large cleaning area, and the cleaning can be completed without stopping the roller press.

[0047] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The accompanying drawings are used to provide an understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention, but do not constitute a limitation of the present invention. In the accompanying drawings:

[0049] Figure 1 is a structural schematic diagram of a roller surface cleaning system according to an embodiment of the present invention at a viewing angle;

[0050] Figure 2 is a schematic structural diagram of a roller surface cleaning system according to an embodiment of the present invention at another viewing angle;

[0051] Figure 3 is a schematic structural diagram of a roller surface cleaning system according to another embodiment of the present invention;

[0052] Figure 4 is a schematic diagram of roller surface partitioning according to an embodiment of the present invention;

[0053] Figure 5 2 is a schematic diagram of a roller surface according to another embodiment of the present invention.

[0054] Description of Reference Numerals

[0055] Label Name Label Name

[0056] 100 Roller surface cleaning system 2 Scraper mechanism

[0057] 1 Cleaning device 3 Center console

[0058] 11 Drive 200 Roller Press

[0059] 12 Laser 210 Roller

[0060] 13 Dust hood DETAILED DESCRIPTION

[0061] The specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0062] The roller surface cleaning system according to the present invention will be described below with reference to the accompanying drawings.

[0063] like Figures 1 to 3 As shown, in an embodiment of the present invention, a roller surface cleaning system 100 is used to clean a roller press 200, and the roller surface cleaning system 100 includes:

[0064] The cleaning device 1 includes a galvanometer, a driver 11 connected to the galvanometer, and a laser 12, wherein the driver 11 is used to drive the galvanometer to move along the large cleaning area, the galvanometer is used to drive the laser 12 to move in the small cleaning area, and the laser 12 is used to emit a dust removal laser to the roller press 200;

[0065] The central console 3, the galvanometer, and the driver 11 are all electrically connected to the central console 3, and the central console 3 is configured as follows:

[0066] Acquiring cleaning parameters of the cleaning device 1 and roller parameters of the roller press 200;

[0067] Preliminarily partitioning the outer surface of the roller press 200 according to the cleaning parameters and the roller parameters to obtain a plurality of large cleaning zones arranged at one time along the axial direction of the roller press 200, and the plurality of large cleaning zones completely cover the outer surface of the roller press 200;

[0068] The large cleaning area is subdivided into zones according to the cleaning parameters and the roller parameters to obtain a plurality of small cleaning areas which are sequentially arranged along the circumference of the roller press 200 and completely cover the large cleaning area;

[0069] Controlling the galvanometer to drive the laser 12 to clean the small cleaning area within the current large cleaning area;

[0070] It is determined that the cleaning of the small cleaning area within the current large cleaning area is completed, and the driver 11 is controlled to drive the galvanometer to move to the next large cleaning area and perform a small area cleaning operation.

[0071] It can be understood that the roller-sticking materials on the roller surface of the roller press 200 include:

[0072] Solid powder (graphite, SP), non-sticky, component content> 98%;

[0073] Binder (SBR, LA136D, CMC, etc.), content of ingredients <2%;

[0074] The dust removal laser emitted by the laser 12 is absorbed by the carbon layer on the roller surface of the roller press 200, generating light vibrations. The instantaneous absorption of large energy forms a rapidly expanding plasma (highly ionized unstable gas), generating shock waves, which break the pollutants into fragments and remove them. The dust removal laser emitted by the laser 12 has a light pulse width that is short enough to avoid heat accumulation that damages the treated surface. At the same time, the absorption of large energy also manifests itself as an instantaneous temperature increase, forming photodecomposition, causing the binder contained in the carbon layer to vaporize or carbonize and lose adhesion and detach from the roller surface. The roller surface and the carbon layer expand to different degrees due to heat, forming photopeeling, and the polluted layer will be peeled off from the roller surface.

[0075] The roller surface of the roller press 200 is chrome-plated. There are three absorption peaks in the atomic absorption spectrum of chromium (Cr), and its wavelength is between 340 and 360 nm. As the wavelength is longer, the reflection is more and the absorption is less. The graphite material has a certain selectivity in absorbing different wavelengths of light. The absorption value of graphite in the ultraviolet light region (200-400 nm) is relatively low. The graphite material in the visible light region absorbs blue and red light wavelengths more strongly. The absorption value in the region of >1000 nm gradually weakens with the increase of wavelength. The dust removal laser emitted by the laser 12 in this embodiment can use a laser near the red light wavelength, which is more suitable for laser roller wiping. The specific laser wavelength is selected as a 1024 um fiber laser 12, which can ensure that more energy is absorbed by the surface carbon layer.

[0076] Plasma is generated when the energy density is higher than the threshold value, which depends on the material itself. Effective cleaning can be carried out under the premise of ensuring the safety of the substrate material. The laser parameters can be adjusted according to the material itself so that the energy density of the light pulse is strictly between the two thresholds (carbon layer absorption energy density threshold < laser energy density < (roller surface) chrome plating absorption energy density threshold).

[0077] It should be noted that the laser spot of the laser 12 can be of the following two types:

[0078] Gaussian spot: high central energy density, small M2 value, small focused spot, and small single pulse energy;

[0079] Flat-top spot: uniform energy distribution, large M2 value, large focused spot, and large single pulse energy;

[0080] In one embodiment, in order to ensure that the energy density of the laser pulse is strictly between two thresholds, the dust removal laser emitted by the laser 12 is a flat-top spot with uniform energy distribution, a softer and easier to control processing surface, a large spot, high energy, and a high processing efficiency value. Under the same power, the cleaning efficiency is extremely high.

[0081] The roller press 200 in this embodiment is mainly used for producing negative electrodes of lithium batteries, and the roller surface cleaning system 100 is mainly used for cleaning the roller surface of the roller press 200. The structure of the roller press 200 is as follows: Figure 1 and Figure 2 As shown, the roller press 200 includes two rollers 210, the axial direction of the two rollers 210 is the left-right direction, and the two rollers 210 are arranged in sequence along the up-down direction. The central console 3 may include a host computer and a control screen, and one central console 3 may be connected to multiple cleaning devices 1. The driver 11 may use a mechanical slide and a connecting rod, and the axial direction of the connecting rod and the roller 210 is the same.

[0082] When the roller surface cleaning system 100 in this embodiment is used to clean the roller surface of the roller press 200, the cleaning parameters of the cleaning device 1 and the roller parameters of the roller press 200 can be obtained through the central console 3; the outer surface of the roller press 200 is preliminarily partitioned according to the cleaning parameters and the roller parameters, and a plurality of large cleaning areas are obtained that are arranged in sequence along the axial direction of the roller press 200, and the plurality of large cleaning areas completely cover the outer surface of the roller press 200; the large cleaning areas are refined and partitioned according to the cleaning parameters and the roller parameters, and a plurality of large cleaning areas are obtained that are arranged in sequence along the circumference of the roller press 200 and completely cover the large cleaning areas. small cleaning area; preliminary zoning and detailed zoning are performed according to the specific parameters of the galvanometer and the roller press 200. When the roller press 200 rotates, the central control console 3 can control the cleaning device 1 to clean the small cleaning areas in multiple large cleaning areas in sequence along the axial direction. The dust removal laser can effectively clean the pollutants on the roller surface, and the roller wiping effect is good. No manual cleaning is required, and the roller press 200 can achieve 24-hour high-speed production without stopping the roller wiping, thereby improving the equipment OEE and avoiding the production of batches of defective electrodes. At the same time, after one-time investment, no other auxiliary materials need to be continuously invested, and the operation and maintenance cost is low and the maintenance is simple. In this embodiment, after the roller surface of the roller press 200 is initially zoned, the zones are further refined within the large cleaning area, so that the galvanometer moves along the axial direction of the roller press 200 and cooperates with the rotational movement of the roller press 200, so that the cleaning device 1 can effectively clean the small cleaning areas. After cleaning multiple small cleaning areas within the current large cleaning area is completed, the central control console 3 can control the driver 11 to drive the cleaning device 1 to move to the next large cleaning area to clean the next large cleaning area, and the cleaning can be completed without stopping the roller press 200.

[0083] The laser 12 in this embodiment can be a fiber laser 12, which can emit flat-top light for cleaning the roller surface. The central console 3 can control the output power of the laser of the fiber laser 12; the galvanometer can shape the laser beam emitted by the fiber laser 12 and then irradiate it on the cleaning position of the roller press 200, and can control the trajectory of the laser.

[0084] In one embodiment, the central console 3 is configured to control the galvanometer to drive the laser 12 to perform small area cleaning on the small cleaning area within the current large cleaning area, including:

[0085] Obtaining a first driving speed of the galvanometer, a spot area of ​​the laser 12 and a rotation speed of the roller press 200;

[0086] The laser scanning width of the galvanometer and the single frame period of the galvanometer moving along a single small cleaning area are obtained according to the laser scanning width, spot area and rotation speed, so that the movement trajectory of the laser 12 completely covers the single small cleaning area within a single frame period.

[0087] In this embodiment, the cleaning parameters of the cleaning device 1 at least include the laser scanning width of the galvanometer and the spot area of ​​the laser 12, and the roller parameters of the roller press 200 at least include the rotation speed of the roller press 200. In this embodiment, by obtaining the first driving speed of the galvanometer, the spot area of ​​the laser 12 and the rotation speed of the roller press 200, and correspondingly adjusting the first driving speed of the galvanometer and the single cycle of the movement of the galvanometer along a single small cleaning area, the movement trajectory of the laser 12 completely covers the single small cleaning area within the single cycle, so that the roller surface cleaning system 100 can adapt to roller presses 200 with different rotation speeds and improve the cleaning efficiency.

[0088] It should be noted that the central console 3 is configured to control the galvanometer to drive the laser 12 to clean the small cleaning area within the current large cleaning area, and further includes:

[0089] Controlling the galvanometer to drive the laser 12 to reciprocate along the axial direction of the roller press 200;

[0090] Determine that the small cleaning area within the current large cleaning area has not been cleaned, and obtain the residence time;

[0091] The driver 11 is controlled to stop driving during the dwell time.

[0092] In the present embodiment, when the cleaning device 1 is in a small area cleaning state, the central console 3 can control the driver 11 to stop driving during the dwell time, so as to avoid the driver 11 interfering with the cleaning device 1. When it is determined that the cleaning of the small cleaning area in the current large cleaning area is completed, the driver 11 is controlled to drive the galvanometer to move to the next large cleaning area and perform a small area cleaning operation.

[0093] In one embodiment, the central console 3 is configured to obtain the stay time including:

[0094] Obtain the number of partitions of the small cleaning area and a single frame cycle of the galvanometer moving along a single small cleaning area;

[0095] The residence time of the drive 11 in a single large cleaning area is calculated based on the number of partitions and the single-frame cycle.

[0096] In this embodiment, the dwell time is obtained specifically according to the number of partitions of the small cleaning area and the single frame cycle of the galvanometer moving along a single small cleaning area, so that the dwell time of the driver 11 can be accurately controlled.

[0097] Specifically, the single frame period of the galvanometer moving along a single small cleaning area is calculated according to the following formula:

[0098] t = πD / v1;

[0099] t is a single frame period of the galvanometer moving along a single small cleaning area;

[0100] D is the roller diameter of the roller press 200;

[0101] v1 is the rotation speed of the roller press 200 .

[0102] In this embodiment, the formula can be used to quantitatively calculate the single-width cycle, so that the control accuracy of the roller surface cleaning system 100 is higher. In addition, the roller diameter and the rotation speed of the roller press 200 can be integrated, so that the roller surface cleaning system 100 can be adapted to roller presses 200 with different operating parameters, and will not be unable to be used due to changes in the parameters of the roller press 200, thereby greatly improving the compatibility of the roller surface cleaning system 100.

[0103] Furthermore, a margin of >3 mm is reserved on both sides of the pole piece, and the number of partitions of the small cleaning area is calculated according to the following formula:

[0104] N4=d / (N-1);

[0105] N4 is the number of partitions in the small cleaning area;

[0106] d is the preset width of the large cleaning area;

[0107] N is the laser scanning width of the laser 12 .

[0108] In this embodiment, the number of partitions of the small cleaning area can be obtained by obtaining the preset width of the large cleaning area and the laser scanning width of the laser 12. Different numbers of small cleaning area partitions can be used for different large cleaning areas and lasers 12, so that the small area cleaning operation can adapt to different large cleaning areas and laser parameters.

[0109] In one embodiment, the laser scanning width of the galvanometer is calculated according to the following formula:

[0110] N = v2*n / 2v1;

[0111] v2 is the first driving speed of the galvanometer;

[0112] v1 is the rotation speed of the roller press 200;

[0113] N is the laser scanning width of the laser 12;

[0114] n*n is the spot area of ​​the laser 12 .

[0115] In this embodiment, the laser scanning width of the galvanometer can be quantitatively calculated by obtaining the first driving speed of the galvanometer, the rotation speed of the roller press 200, the laser scanning width of the laser 12 and the spot area of ​​the laser 12, so as to accurately obtain the laser scanning width of the galvanometer.

[0116] Specifically, in one embodiment, with a margin of more than 3 mm reserved on both sides of the pole piece, the central console 3 can obtain the preset width of the large cleaning area and the laser scanning width of the laser 12, and calculate the number of partitions of the large cleaning area by the preset width of the large cleaning area and the laser scanning width of the laser 12:

[0117] N3=(M+6) / d;

[0118] M<L;

[0119] N3 is the number of partitions of the large cleaning area;

[0120] M is the width of the pole piece rolled by the roller press (200);

[0121] d is the preset width of the large cleaning area;

[0122] L is the length of the rollers of the roller press (200).

[0123] In this embodiment, the number of partitions of the large cleaning area can be obtained by obtaining the width of the pole piece rolled by the roller press 200, the preset width of the large cleaning area and the roller length (i.e., the axial length) of the roller press 200. Different numbers of large cleaning area partitions can be used for different roller parameters to make the large area cleaning operation adapt to different roller parameters.

[0124] Specifically, a single-width cycle, the number of partitions of the small cleaning area, the number of partitions of the large cleaning area, the width of the pole piece rolled by the roller press 200, the preset width of the large cleaning area, and the second driving speed of the driver 11 can be obtained, and the entire width cycle of the surface cleaning of the roller press 200 by the driver 11 can be calculated by the above parameters:

[0125] T = t*N4*N3+(Md) / v3;

[0126] T is the entire cycle of the surface cleaning of the roller press 200 completed by the driver 11;

[0127] t is a single frame period of the galvanometer moving along a single small cleaning area;

[0128] N4 is the number of partitions in the small cleaning area;

[0129] N3 is the number of partitions in the large cleaning area;

[0130] M is the width of the pole piece rolled by the roller press 200;

[0131] d is the preset width of the large cleaning area;

[0132] v3 is the second driving speed of the driver 11 .

[0133] Where, d = N2 / 2;

[0134] d is the preset width of the large cleaning area;

[0135] N2 is the maximum moving range of the field mirror.

[0136] In this embodiment, the entire cycle of the surface cleaning of the roller press 200 completed by the driver 11 is calculated by combining the cleaning parameters of the cleaning device 1 and the roller parameters of the roller press 200 , so that the roller surface cleaning system 100 can adapt to the rotation speeds of different roller presses 200 .

[0137] In the embodiment of the present invention, the central console 3 is further configured as:

[0138] When it is determined that the roller press 200 is started, obtaining a rate of change of the rotation speed of the roller press 200 within a preset time period;

[0139] When it is determined that the change rate exceeds the preset change range, the cleaning device 1 is shut down;

[0140] When it is determined that the change rate does not exceed the preset change range, the cleaning device 1 is started.

[0141] The central control console 3 in this embodiment is connected to the roller press 200, and can obtain the start signal of the roller press 200. When the roller press 200 is driven to start, the rotation speed of the roller press 200 within a preset time period is obtained, and the change rate of the rotation speed of the roller press 200 within the preset time period is determined. The change rate can be used to accurately determine whether the roller press 200 is in the production parameter change stage. If it is determined that the change rate exceeds the preset change range, it can be determined that the roller press 200 is in the production parameter change stage, and the cleaning device 1 is shut down to avoid the cleaning device 1 from cleaning the electrode by mistake. When it is determined that the change rate does not exceed the preset change range, it can be determined that the roller press 200 is in the stable production stage, and the cleaning device 1 is started to adapt to the current production parameters.

[0142] like Figure 2 and Figure 3 The cleaning device 1 further includes a dust cover 13, a dust removal pipeline and a dust collector which are connected in sequence. The dust cover 13 is connected to the driver 11. The dust cover 13 is used to completely cover the laser landing point of the laser 12. The dust collector is used to collect dust through the dust removal pipeline. The dust collector can be an explosion-proof dust collector. One dust collector can be connected to multiple dust covers 13 through the dust removal pipeline. The galvanometer can be connected to the mechanical slide through the dust cover 13 to ensure that the galvanometer and the dust cover 13 run synchronously.

[0143] Specifically, the roller press 200 includes two rollers 210, two cleaning devices 1 and two rollers 210 are arranged in a one-to-one correspondence, and the two cleaning devices 1 are arranged radially opposite to the roller press 200, and the roller surface cleaning system 100 also includes a scraper mechanism 2 for scraping dust from the surface of the roller press 200, the two scraper mechanisms 2 are located between the two cleaning devices 1, and the two scraper mechanisms 2 and two rollers 210 are arranged in a one-to-one correspondence. The scraper mechanism 2 in this embodiment always contacts the roller surface of the roller press 200, and during the rotation of the roller 210, the scraper mechanism 2 can assist in cleaning large particles remaining. Two cleaning devices 1 can be arranged in the roller surface cleaning system 100, the two rollers 210 are arranged in the up and down direction, and the two cleaning devices 1 can be arranged on the upper and lower sides of the roller press 200. In this embodiment, the resin scraper of the scraper mechanism 2 fits the roller surface, and can clean the particle foreign matter remaining after the laser roller cleaning, and the particle foreign matter is collected by the dust box below the scraper mechanism 2 and processed. The dust cover 13 completely covers the laser landing point of the laser 12, and can perform negative pressure dust removal and adsorption on the laser cleaning point. The negative pressure wind speed of >20m / S will extract all the generated dust through the dust removal pipeline, and the configured explosion-proof dust collector can handle the corresponding dust.

[0144] The entire roller surface is divided into several large cleaning areas. After the point laser cleans a large cleaning area along the belt direction, it moves to the next large cleaning area to continue cleaning, repeating the cycle.

[0145] like Figure 4 and Figure 5 As shown, in one embodiment, the roller parameters of the roller press 200 to be cleaned are:

[0146] The width of the pole piece rolled by the roller press 200 is 558 mm;

[0147] The rotation speed of the roller press 200 is 20 m / min;

[0148] The roller length is 800mm;

[0149] The roller diameter is 800mm;

[0150] Cleaning parameters of cleaning device 1:

[0151] The first driving speed of the galvanometer can be 20000 mm / s;

[0152] The second driving speed of the driver 11 may be 100 mm / s;

[0153] The maximum moving range of the field mirror is 175mm;

[0154] The spot area of ​​the laser 12 may be 1*1 mm.

[0155] Specifically, for a pole piece coating width of 558 mm, a 1 mm margin can be reserved on both sides of the pole piece coating width, so that the entire cleaning width of the large cleaning area is 560 mm, and the entire roller surface area is divided into 5 large cleaning areas. The width of each large cleaning area is 112 mm, and the laser movement range is within the maximum movement range of the field mirror (175 mm). A 0.5 mm wide overlap area can be set between two adjacent large cleaning areas, and the specific overlap width can be adjusted appropriately according to the usage effect.

[0156] For each large cleaning area, it can be divided into 4 areas, and the parameters of each small cleaning area are;

[0157] The laser scanning width can be: (0.5 / 20000*60*20000=30), and a 0.5mm overlap area is set between two adjacent small cleaning areas, and the actual width can be 28.5mm;

[0158] The residence time of each small cleaning area is: (800π / 20000*60=7.536s). To ensure that each small cleaning area is fully covered by cleaning, it can be 7.7s-7.8s. To ensure that each large cleaning area is fully covered by cleaning, the residence time of each large cleaning area can be: 7.8*4=31.2S.

[0159] In the description of the present invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0160] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0161] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0162] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A roller surface cleaning system for cleaning a roller press (200), characterized in that: The roller surface cleaning system (100) comprises: A cleaning device (1), comprising a galvanometer, a driver (11) connected to the galvanometer, and a laser (12), wherein the driver (11) is used to drive the galvanometer to move along a large cleaning area, the galvanometer is used to drive the laser (12) to move within a small cleaning area, and the laser (12) is used to emit a dust removal laser to the roller press (200); The central console (3), the galvanometer and the driver (11) are electrically connected to the central console (3), and the central console (3) is configured as follows: Acquiring cleaning parameters of the cleaning device (1) and roller parameters of the roller press (200); Preliminarily partitioning the outer surface of the roller press (200) according to the cleaning parameters and the roller parameters to obtain a plurality of large cleaning areas arranged at one time along the axial direction of the roller press (200), wherein the plurality of large cleaning areas completely cover the outer surface of the roller press (200); According to the cleaning parameters and the roller parameters, the large cleaning area is divided into subdivisions to obtain a plurality of small cleaning areas which are sequentially arranged along the circumference of the roller press (200) and completely cover the large cleaning area; Controlling the galvanometer to drive the laser (12) to perform small area cleaning on the small cleaning area within the current large cleaning area; It is determined that the cleaning of the small cleaning area within the current large cleaning area is completed, and the driver (11) is controlled to drive the galvanometer to move to the next large cleaning area and perform a small area cleaning operation.

2. The roller surface cleaning system according to claim 1, characterized in that: The central control console (3) is configured to control the galvanometer to drive the laser (12) to perform small area cleaning on the small cleaning area within the current large cleaning area, including: Acquiring a first driving speed of the galvanometer, a spot area of ​​the laser (12), and a rotation speed of the roller press (200); The laser scanning width of the galvanometer and the single frame cycle of the movement of the galvanometer along the single small cleaning area are obtained according to the first driving speed, the spot area and the rotation speed, so that the movement trajectory of the laser (12) completely covers the single small cleaning area within the single frame cycle.

3. The roller surface cleaning system according to claim 2, characterized in that: The central control console (3) is configured to control the galvanometer to drive the laser (12) to perform small area cleaning on the small cleaning area within the current large cleaning area, and further includes: Controlling the galvanometer to drive the laser (12) to reciprocate along the axial direction of the roller press (200); Determine that the small cleaning area within the current large cleaning area has not been cleaned, and obtain the residence time; The driver (11) is controlled to stop driving during the dwell time.

4. The roller surface cleaning system according to claim 3, characterized in that: The central console (3) is configured to obtain the dwell time including: Acquire the number of partitions of the small cleaning area and a single frame cycle of the galvanometer moving along a single small cleaning area; The residence time of the driver (11) in a single large cleaning area is calculated according to the number of partitions and the single-width cycle.

5. The roller surface cleaning system according to claim 4, characterized in that: The single frame period of the movement of the galvanometer along a single small cleaning area is calculated according to the following formula: t = πD / v1; t is a single frame period of the galvanometer moving along a single small cleaning area; D is the roller diameter of the roller press (200); v1 is the rotation speed of the roller press (200).

6. The roller surface cleaning system according to claim 4, characterized in that: The number of partitions in the small cleaning area is calculated according to the following formula: N4=d / (N-1); N4 is the number of partitions in the small cleaning area; d is the preset width of the large cleaning area; N is the laser scanning width of the laser 12 .

7. The roller surface cleaning system according to any one of claims 2 to 6, characterized in that: The laser scanning width of the galvanometer is calculated according to the following formula: N = v2*n / 2v1; v2 is the first driving speed of the galvanometer; v1 is the rotation speed of the roller press (200); N is the laser scanning width of the laser (12); n*n is the spot area of ​​the laser (12).

8. The roller surface cleaning system according to any one of claims 1 to 6, characterized in that: The central console (3) is also configured as: When determining that the roller press (200) is started, obtaining a rate of change of the rotation speed of the roller press (200) within a preset time period; When it is determined that the change rate exceeds a preset change range, shutting down the cleaning device (1); When it is determined that the change rate does not exceed a preset change range, the cleaning device (1) is started.

9. The roller surface cleaning system according to any one of claims 1 to 6, characterized in that: The cleaning device (1) further comprises a dust hood (13), a dust removal pipeline and a dust collector which are connected in sequence, the dust hood (13) is connected to the driver (11), the dust hood (13) is used to completely cover the laser landing point of the laser (12), and the dust collector is used to collect dust through the dust removal pipeline.

10. The roller surface cleaning system according to any one of claims 1 to 6, characterized in that: The roller press (200) comprises two rollers (210), the two cleaning devices (1) and the two rollers (210) are arranged in a one-to-one correspondence, and the two cleaning devices (1) are arranged radially opposite to each other with respect to the roller press (200), and the roller surface cleaning system (100) further comprises a scraper mechanism (2) for scraping dust off the surface of the roller press (200), the two scraper mechanisms (2) are located between the two cleaning devices (1), and the two scraper mechanisms (2) and the two rollers (210) are arranged in a one-to-one correspondence.

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