KR101276491B1 - A method for measuring a plate shape of a web - Google Patents

Abstract

The present invention relates to a plate-shaped measuring apparatus of a web product, and more particularly, to a method and apparatus for measuring a shape change of a plate due to the shape of a plate of a web product, that is, the thickness uniformity. have.
As a result, according to the present invention, the plate-like quality inspection of web products such as aluminum foil (Al-Foil), copper foil (Cu-Foil), and a separator (porous film) used in the manufacture of secondary batteries is performed by conventional visual inspection. In addition, quality inspection can be performed by standardized data through a dedicated measuring device. Also, in the existing visual inspection, a difference in judgment may occur for each inspector, and a difference in judgment may occur even if the same person makes a judgment. However, the dedicated measuring device enables quality control based on the same standard at all times, and also enables users to set various conditions such as tension, measurement interval adjustment, etc. applied to web products. Through this, the quality standards of the applied products can be directly established, and the standards can be clearly established, and also clear and quantified between users and suppliers of Web products. By sharing the quality standards, the possibility of product quality disputes can be eliminated, and the defective rate of secondary batteries can be remarkably reduced by proactively blocking the defects that occur in the secondary battery manufacturing process using web products. It is possible to prevent expensive raw material loss. In other words, the proportion of web products in the secondary battery manufacturing process is only about 4% of the total material costs, but the positive and negative active materials coated in slurry form are 50% of the total material costs. Because of the flaw of the web products, this leads to poor coating, which leads to expensive raw material loss.
In addition, the failure of the secondary battery may cause an explosion accident, the present invention in the process of increasing the capacity through the miniaturization and weight reduction of the unit cell (Cell) makes a significant contribution to securing the secondary battery stability.

Description

Plate measurement method of web product {A METHOD FOR MEASURING A PLATE SHAPE OF A WEB}

The present invention relates to a plate-shaped measuring apparatus of a web product, and more particularly to a method and apparatus for measuring the shape change of the plate due to the shape of the plate of the web product, that is, the thickness uniformity.

In the conventional secondary battery manufacturing process, when determining the quality of web-type materials (aluminum foil, copper foil, and films) to be injected, only the reference thickness of a certain portion of the product was measured to determine whether it was within the standard range, and the plate shape of the whole product was also measured. Since there is no inspection device that can accurately measure the shape of the plate, it was performed based on visual inspection of the operator.

In Rolling Mill, which manufactures Al-Foil or Cu-Foil, it manufactures products and uses real-time X-ray thickness measuring equipment worth hundreds of millions of dollars installed in each facility. As a result, the thickness of the product is measured and automatic control is performed. Also, a foil product is produced by an automatic plate control system called AFC (Automatic Flatness Control).

However, in general, the thickness of the foil product passing through the rolling process is extremely thin (10 μm to 30 μm), while the full width of the product reaches 1,200 mm to 2,000 mm. ) In the unstable control state, there is a slight thickness variation between the parts in the full width direction, which causes a change in shape, resulting in an uneven plate shape.

This non-uniform plate-like web product also causes uneven operation in the coating process of uniformly applying and coating the positive or negative electrode material of the secondary battery manufacturing process to foil. Subsequently, there will be an imbalance in quality (capacity, etc.) between secondary battery products, which are finished products.

In the secondary battery manufacturing process, a slurry is prepared by dissolving and mixing a negative electrode material or a positive electrode material with a binder that enhances bonding strength thereof in a solvent, and preparing a slurry, which is a current collector, such as Al-Foil (anode) or Cu-Foil (cathode). After coating to a certain thickness (coater), the separator is inserted between the anode plate and the cathode plate prepared in this way, and to increase the density of the coalescing through the press process (Press) in order to densify the space in which the solvent flows inside the plate The slitting process is performed to cut the electrode plate into a size for inserting it into the cell, and finally, a vacuum drying process is performed to evaporate the moisture remaining in the electrode plate and the residual solvent added during the slurry production. 1)

That is, since the manufacturing process of the secondary battery is also mostly made of a web (Web) state, the defective plate of the product, such as wave affects the production of the product.

The mainstream of the existing secondary battery is a battery for digital home appliances such as mobile phones, camcorders, PDAs, MP3 players, digital cameras, electronic dictionaries, laptops, etc. This is a small capacity secondary battery composed of a small number of cells have.

Currently, development has been made to increase the overall battery capacity by miniaturizing the unit cell, and since such a small secondary battery is composed of a small number of unit cells, the uniformity of the thickness is not a problem. .

However, the future secondary batteries, which are used and developed in part, are aimed at the development of large-capacity batteries ranging from electric bicycles, electric scooters, to electric vehicle batteries, and large-capacity storage batteries for solar energy systems. have.

In this situation, in order to commercialize and develop a product, it is inevitably required to increase the capacity of the battery itself and to reduce the volume and weight to be applicable to the above systems.

Basically, since the battery system determines the final battery capacity by connecting a large number of unit cells in series and parallel, miniaturization and weight reduction of the basic unit cells are essential to achieve this.

As a result, the unit cell must be miniaturized and lightened while maintaining the same performance, and thus, miniaturization and weight reduction of each material such as an electrode, an electrolyte, a separator, and a current collector constituting the cell are required.

For these reasons, battery system development manufacturers require thinner Web products such as Al-Foil, Cu-Foil, and porous films. Therefore, the plate state of Web products affecting performance as the thickness becomes thinner. That is, the uniformity of the thickness and the shape of the plate is an important factor.

In addition, since the battery system is composed of many unit cells, uniform performance between each cell has a great influence on the performance of the entire system, and a stable constant voltage circuit and constant current circuit can be achieved. The thickness uniformity of is also important.

In order to establish standards and measure quality control of web products (Al-Foil, Cu-Foil, porous film, etc.) It became necessary.

However, until now, a method for stably measuring the state of a plate (a change in shape of a plate due to uniformity of thickness) over a full width of a product having a fine thickness of about 10 μm to 30 μm has not been disclosed.

In order to solve the above problems, the present invention is to provide a method and apparatus for measuring the shape change of the plate due to the uniformity of the plate shape, that is, the thickness of the Web (Web) products.

As a means for solving the above-mentioned technical problem, the invention of Claim 1 is the measuring part 10 which measures the uniformity of plate shape of a Web product; A winding-up unit 20 for releasing the wound web product by rotation and transferring it to the measurement unit; A winding unit 30 winding the web product transferred from the measuring unit; A control unit 40 for receiving a result of the measurement from the measuring unit and controlling the tensioning force of the web product by controlling operations of the unwinding unit and the winding unit; An input unit 50 for inputting a test condition and a control command to the control unit; And an output unit 60 receiving and outputting the result measured by the controller. It provides a plate-shaped measuring apparatus comprising a.

In addition, according to the invention of claim 2, the plate-shaped measuring device according to claim 1, the zero reference bar 100 for setting the zero point which is the reference of the plate uniformity deviation before the measurement unit 10 starts the measurement ; In addition, the zero reference bar 100 provides a plate-shaped measuring device, characterized in that made of a micro gauge that can be adjusted in units of micrometers.

In addition, the invention according to claim 3, The measuring unit 10, The laser displacement sensor (11) for detecting the uniformity of the plate by measuring the distance to the web (Web) product; Proximity sensor 12 for detecting the presence of the Web (Web) product; And a zero point proximity sensor 13 for detecting whether the laser displacement sensor 11 is positioned at a zero point that is a starting reference of the plate uniformity measurement. Including, but, if the proximity sensor for determining the zero position 13 is in the zero position with respect to the position of the laser displacement sensor 11 and if not in the zero position to move the laser displacement sensor 11 to the zero position Provided is a plate measuring apparatus, characterized in that.

In the invention according to claim 4, the laser displacement sensor 11 has an interval of 0.5 mm to 1.5 mm for measuring the uniformity of the plate with respect to the width direction of the web product. The distance measurement measurable based on the zero point set by the zero reference bar 100 with respect to the distance change between the laser displacement sensor and the web product generated in accordance with the shape change of the plate measurement device, characterized in that at least 2㎛ To provide.

In addition, the invention described in claim 5, (a) adjusting the unwinding unit 20 and the winding unit 30 through the control unit 40 to apply a tensile tension set in the Web (Web) products; (b) the control unit maintaining the set tensile tension and adjusting the unwinding unit 20 and the winding-up unit 30 to move the web product in a longitudinal direction to a measurement test point; (c) measuring the uniformity of the plate while the measuring unit 10 moves in the width direction of the web product; And (d) returning to the zero position after the measurement unit 10 ends the measurement. It includes, but the step (c), the laser displacement sensor 11 measuring the distance to the zero reference bar 100 to set the zero point which is a reference of the plate uniformity deviation reference; A second zero point setting step in which the laser displacement sensor 11 determines and sets a zero point, which is a starting point of measurement when measuring plate uniformity, by a proximity sensor for zero position check; When the laser displacement sensor 11 moves in the width direction of the plate and the proximity sensor 12 detects the presence of the product, the laser displacement sensor 11 measures the uniformity of the plate from the beginning of the presence of the product. Measuring; And when the proximity sensor 12 checks the position of the end portion of the width direction of the product while the laser displacement sensor 11 moves and measures the width, the laser displacement sensor 11 is the width of the web product. Measuring to the end of the direction and ending the measurement; It provides a plate measurement method comprising a.

According to the present invention, plate quality inspection of web products, such as aluminum foil (Al-Foil), copper foil (Cu-Foil), and separator (porous film) used in the manufacture of secondary batteries, Quality inspection can be performed by standardized data through dedicated measuring devices.

In addition, in the existing visual inspection, a difference in judgment may occur for each person to be inspected, and a difference in judgment may occur even if the same person makes a judgment, but quality control can always be performed by the same standard by a dedicated measuring device.

In addition, it is possible to set various conditions such as tension and measurement interval applied to web products, and users can directly establish the quality standards of the applied products through various tests, and also establish the standards clearly. You can do it.

In addition, the sharing of clear and quantitative quality standards between Web product users and suppliers eliminates disputes over product quality.

In addition, it is possible to significantly reduce the defective rate of the secondary battery by blocking in advance the failure factors that occur in the secondary battery manufacturing process using the Web (Web) products it is possible to prevent expensive raw material loss. In other words, the proportion of web products in the secondary battery manufacturing process is only about 4% of the total material costs, but the positive and negative active materials coated in slurry form are 50% of the total material costs. This leads to poor coating on the web product, which leads to expensive raw material loss.

In addition, the failure of the secondary battery may cause an explosion accident, the present invention in the process of increasing the capacity through the miniaturization and weight reduction of the unit cell (Cell) makes a significant contribution to securing the secondary battery stability.

1 is a view showing an example of a secondary battery pole plate step,
Fig. 2 is a diagram showing a defective plate-like sample in which a wave is generated by stretching an intermediate portion.
3 is a side view of a portion of a preferred embodiment of the present invention,
4 is a front view of a portion of a preferred embodiment of the present invention,
5 is a view showing an embodiment of a measuring unit of the present invention,
Figure 6a is a diagram showing the configuration of each part of a preferred embodiment of the present invention,
6B is a view showing an embodiment of an input unit and an output unit of the present invention,
6C is a diagram illustrating an embodiment of a controller of the present invention;
Figure 6d is a view showing an embodiment of the measuring unit and the transfer means for moving it,
Figure 6e is a view showing an embodiment of the measurement unit and the zero reference bar of the present invention,
Figure 6f is a view showing an embodiment of the encoder of the transfer means for moving the measuring unit of the present invention,
Figure 6g is a view showing an embodiment of the tensile tension measurement sensor of the present invention,
Figure 6h is a view showing an embodiment of a drive unit (servo motor) of the transfer means for moving the measuring unit of the present invention,
6I is a view showing an embodiment of a drive unit (servo motor) for driving the winding unit of the present invention,
7 is a view showing an embodiment of the configuration of the present invention,
8 is a flowchart illustrating a general embodiment of the present invention.
9 is a flowchart showing a step of performing a measurement test for an embodiment of the present invention,
10 is a view showing an embodiment of an input unit and an output unit of the present invention,
11A is a diagram illustrating an embodiment in which test measurement result data according to the present invention is listed.
11B is a diagram illustrating an example in which test measurement result data according to the present invention is output as a graph.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly explain the present invention in the drawings, parts not related to the description are omitted, and similar parts are denoted by similar reference numerals throughout the specification.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Fig. 2 is a diagram showing a defective plate-like sample in which a wave is generated by the middle portion stretching.

Web products that go through rolling processes such as aluminum (Al-Foil) or copper foil (Cu-Foil) are processed into products with a thin contact thickness due to the strong pressing force and the high tension to stretch. If a higher tensile tension is applied to a specific part of the product width of the part, the part becomes more stretched and thinner than the surrounding part. In this part where there is a deviation compared to the thickness of the surroundings, a wave phenomenon such as minute stretching or bending occurs even when a constant tension is applied to the plate shape of the product.

This phenomenon occurs in all web products such as foils or films that are wound by tension, and waves caused by poor thickness uniformity are coated in the secondary battery manufacturing process. Secondary battery that affects the accuracy of the coating process by affecting the process, and also tension is applied to the subsequent roll press (R / Press) process and slitting process to unwind and roll in roll form. This will affect the overall manufacturing process.

Until now, detailed thickness measurement on the entire width was not carried out, but only the standard thickness was measured to manage the product.In addition, the uniformity of the plate (the change in the shape of the plate due to the uniformity of the thickness) was also measured by visual inspection, not by quantitative data management. Has been dependent on.

However, in order to measure thickness uniformity of a web product, a thickness measuring device using X-ray used in a rolling process may be used, but this is difficult to apply due to various restrictions. Because thickness measuring equipment using X-Ray is too expensive import equipment, size, weight and auxiliary devices exceed certain level, it is fixed type for measuring the reference thickness of specific part in large equipment such as rolling equipment. Although it can be installed in a simple measuring device for inspecting the full width of a web product, there is a point that cannot be installed in a mobile device. Also, due to the characteristics of X-ray, it is difficult to comply with all laws such as licensing and certification of radiation-related devices. There is also.

Accordingly, the present invention provides an apparatus for measuring the uniformity of a web product plate, which occurs due to the variation in thickness and substantially affects workability, rather than directly measuring the thickness of the web product.

In order to solve the above problems, the web product plate measuring apparatus proposed by the present invention adopts a high-sensitivity laser displacement sensor that measures a separation distance from an object at a close distance as a measuring sensor.

Conventional X-Ray thickness sensor measures thickness by X-ray passing through an object and compensating and measuring transmittance according to the material of the object, whereas laser sensor measures distance by laser light reflected from the object. Since the thickness uniformity of the product is measured based on this measurement, the material of the product to be inspected is not affected.

In addition, by applying this principle, in order to make accurate measurement and measurement result data, design of vertical measuring method, tension control for inspection, zero point of measuring sensor, high precision measuring sensor part conveying device, etc. are implemented. We developed a dedicated program that can collect and store measurement data and output it as graphs and test reports.

Through the above configuration, the present invention does not measure the actual thickness of the web product, but provides a device for measuring a change in the plate shape of the web product caused by the thickness variation of the product, thereby substantially covering the entire product width. Even if there is a slight thickness variation, the wave form or variation caused by the wave is generated in a different type according to the state, and the influence on the web product processing process is also different. The uniformity of the plate shape, such as waves directly affecting the manufacturing process, is measured directly and managed with quantitative numerical values so that stable quality control standards can be established and managed.

Example

The configuration of the web product plate measuring apparatus of the present invention is a winding unit (Unwinder) 20 for releasing the product largely, as shown in Figures 3 and 4, winding the product by pulling the appropriate tension (Tension) The rewinder 30, the measuring unit 10 for measuring the plate shape of the product in the flat portion in the middle, the servo motor driving the rewinder and the unwinder Control the tension tension of the Web product by controlling the Web and the other plate uniformity measurement results are received and connected to the input unit and the output unit 40 and the input unit 50 for receiving the measurement conditions, monitor the measurement results Or it is divided into an output unit 60 for output to the printer.

The operation of the equipment is basically the same as that of the slitter machine or rewinder machine which winds general web products. Winding unit (Rewinder 30) is carried out by pulling the product under the set tension control by the motor drive, unwinder (20) maintains a constant tension by the motor drive and powder brake (Powder Brake) And release the product. In addition, a tension pick-up sensor 90 for measuring and feeding back the set tension is positioned between the unwinder 20 and the first guide roll 70.

The Web product uses a tension pick-up sensor 90 on another guide roll between the unwinder 20 and the unwinder 20 and the first guide roll 70. Through the first guide roll 70 at the upper end of the measuring unit 10 and the second guide roll 80 at the lower end of the measuring unit 10, the coil is wound into a rewinder 30. The product passes through the first guide roll 70 and the second guide roll 80 at the top of the measuring unit 10 and is kept flat to enable precise measurement by the set tension.

The product was designed to be measured in the vertical direction to prevent it from sagging in the middle part due to gravity because the product is wide in the horizontal or diagonal direction.

Basically, the plate measurement can be measured both during the transfer and when the product is stopped. However, it is preferable to measure the plate when it is stopped with a constant tension applied to the product because the purpose is to measure the plate on the same line.

FIG. 5 shows an embodiment of the measuring unit, which is viewed from the front.

The measuring unit 10 is equipped with a laser displacement sensor 11 for measuring plate-like, there is a bracket pedestal that can be fixed and move left and right, proximity sensor for detecting the presence of the Web (Web) products on the left and right sides of the laser displacement sensor (12) is provided, and at one end of the measuring section, there is a zero reference bar (100) with a micro meta to measure and zero the reference position of the plate uniformity deviation before the laser sensor starts measuring. A high-precision LM guide rail for conveying the laser displacement sensor 11 to the right and left is provided, and is composed of a servo motor and an encoder for controlling and operating precise feeding. In addition, a zero position proximity sensor 13 is further provided to detect whether the measuring unit 10 is located at the zero point which is the starting reference of the plate uniformity measurement, and thus the position of the laser displacement sensor 11 starts measurement. If it is not at the start point of time, it can be automatically moved to the start point, and at the same time, it can stop the movement by checking the detection signal that the measuring unit 10 that has finished and returned to the zero position has been reached.

In the present invention, for precise measurement in the unit of μm, the measuring sensor is capable of measuring the unit of μm and configured a laser displacement sensor 11 with a quick response speed. In order to minimize the error, the zero reference bar 100 is configured, and the transfer system of the measuring unit 10 is an ultra-precision grade LM used for precision machine tools such as lathes and milling machines in order to eliminate vibrations and self-deviation during transportation. It is preferable to apply the guide bearing in double, and since the wave change of the product occurs according to the change amount of the tensile tension applied to the product, the drive on the rewinder 30 side is 0.1 unit tension. It is desirable to construct a servo motor that can control precisely in kg / mm2 units, and it is possible to control the precise measuring position and to make a web. In addition, the measurement unit 10 can measure the desired interval at 5 mm intervals, 10 mm intervals, 20 mm intervals, or 50 mm intervals by continuously changing the settings for the full width, and stably acquire measurement data. It is preferable to configure a servo motor and an encoder for the transfer.

In addition, as described above, having a input unit 50 for inputting measurement conditions and other control commands, the storage unit for storing the measurement data through the control unit 40 after the measurement unit 10 completes the measurement of the uniformity of the plate It is desirable to have an output unit capable of outputting the measurement results to a monitor or a printer.

As an embodiment of the present invention to set a zero point that is a standard for accurately measuring the change in the shape of the plate caused by the change in the thickness of the plate set using the zero reference bar 100, based on the zero point By measuring the distance change between the laser displacement sensor and the web product caused by the change in the shape of the plate and by allowing the precise measurement of the difference in deviation between the zero point and the changed distance to a minimum difference of 2㎛, through the continuous measurement according to the present invention It is now possible to establish more definite quality standards for manufacturing processes. As a result, it is possible to perform good work in the secondary battery manufacturing process.

FIG. 10 is a diagram illustrating input items and outputs to a monitor according to the present invention. FIG. 10 also lists inspection test result data according to the present invention as a list and graphically shows test test result data. FIGS. 11A and FIG. Same as 11b. That is, in FIGS. 11A and 11B, the inspector can easily determine whether the web product is good or not at a glance through precise deviation measurement according to the plate change.

7 is a block diagram illustrating a configuration according to an embodiment of the present invention.

The PLC system of FIG. 7 may correspond to the control unit 40, and receives an input from various sensors to control various motors.

The laser sensor may correspond to the laser displacement sensor 10 and measure the separation distance of the web product in real time to report measurement data on the uniformity of the plate to the controller, and the product width detection sensor It can correspond to the proximity sensor 20, by detecting the presence of the product to recognize the width of the product, that is, the measurement section to accurately measure the entire width, the position-sensitive proximity sensor to the proximity sensor for zero position It is possible to detect whether the laser displacement sensor has reached the zero position, and set the transfer limit range of the laser displacement sensor so that it can be controlled to automatically transfer to the zero point before the measurement starts if it is not at the zero position, and return after the measurement is completed. Enable feed stop control.

The line encoder returns the distance signal conveyed in the longitudinal direction of the product and makes it controllable so that the accurate movement distance can be measured, thereby providing the coordinate data in the longitudinal direction to the controller.

The transfer encoder may return and control the position signals of the laser displacement sensor or the measuring unit to provide the controller with accurate coordinate data about the width direction of the product. The operation switch transmits an on / off input signal to the controller and also transmits various input signals such as a dial.

The tension pick-up sensor may correspond to the tensile tension measuring sensor 90 and measures the total tensile tension applied to the web product and transmits it to the control unit. May be immediately visible to the naked eye.

By placing a touch roll, the tension can be controlled by the touch roll pressure, which can be controlled by the pneumatic cylinder.

U / W (Unwinder) drive control is a configuration for controlling the driving of the unwinding unit 20 is one configuration for controlling the tension and the brake can be controlled by the powder brake (Powder Brake) in one embodiment.

R / W (Rewinder) Servo Motor and R / W Servo Drive control the tensile tension of the Web product by controlling the driving of the winding unit 30 and at the same time transfer the product. Make the speed controllable together.

The Servo Motor and Servo Drive control the position measured by the laser displacement sensor and control the feed speed together.

The control screen (industrial PC) and the color printer may correspond to the input unit, the output unit, and the storage unit, and the operator may set input commands and working conditions, and output the measurement results to a monitor or a printer. In addition to this, a dedicated program can be added to enable the operator to input conveniently in the form of a GUI (Graphic User Interface), and output in a variety of formats desired by the operator in a list format, a table format, a graph format, and a report format. You can do that.

In addition to the tension tension control configuration described above, the tension tension control of the other unwinding portion 20 can be DC motor control by the position of the dancer roll (Dancer Roll), it may be possible through the air brake control, etc. by the tension detection device. have. In addition, the tension tension control of the winding unit 30 may be controlled by a powder clutch control by a tension detection device, a powder clutch control by a diameter detection, and a motor speed by a tachometer generator. It may also be possible through control and tension control by frictional release.

8 is a view showing a flowchart according to an embodiment of the present invention, Figure 9 is a view showing a flow chart specifically showing the step of performing a measurement test of the present invention.

The work flow of the plate measuring apparatus of the present invention is largely composed of a test preparation step, an inspection work execution step, a continuous inspection performance step and an inspection report output step.

The inspection work preparation step includes mounting a coil product to be inspected by an operator to the unwinder 20, unscrewing the product and passing the product to the rewinder 30; Close the Touch Roll and input the product specification and inspection conditions (customer, product name, coil number, product width, thickness, inspector, unit tension, inspection frequency, etc.) on the main screen of the operation panel. Step, the step of applying a tension (Tension) so that the product can be inspected (S100) and to move the product to the measurement inspection point by moving the proper distance in the longitudinal direction (Y axis direction) of the product while the tension is maintained Step S200 is made.

The inspection operation is performed by measuring the distance between the zero displacement bar and the zero reference bar 100 through the zero reference bar (micro-gauge) 100, which is a measurement reference line. In the step of setting the zero point, the proximity sensor 13 for determining the zero position of the measuring unit 10 determines whether the zero point becomes a starting reference point when measuring the uniformity of the plate displacement of the laser displacement sensor 11 (S311). In the case of deviation from the zero point, the laser displacement sensor 11 is moved to a zero adjustment position by driving a servo motor for feeding (S312), and the zero position proximity sensor 13 includes the laser displacement sensor ( If it is determined that the position of the 11) is at the zero position, the second zero setting step (S310) and the feed servo motor (Servo Mo) including a step (S313) of setting the current position of the laser displacement sensor 11 to zero. tor) control to transfer the laser displacement sensor 11 in the width direction (X-axis direction) of the product to measure the uniformity of the plate (S320), to check the product position through the proximity sensor 12 mounted on the measurement unit And storing the measured values of the uniformity of the plate in the storage unit and outputting the result data through the data or graphs listed in the monitor or printer (S600). Checking the position of the part, the laser displacement sensor 11 measures to the end position in the width direction of the product and ends the measurement (S330). When the measurement is finished, the zero position is controlled by the servo motor for transportation. During the step of returning to the plate and measuring the plate, deviation between the product width detected by the product width sensor and the initial input product width occurs, or the tensile tension measured by the pick-up sensor and the pick-up sensor In the event of a deviation, a warning message is provided to the inspector.

The continuous inspection step includes the step of performing a series of the above inspection operation steps again after the operator transfers the product in the Y-axis direction in the longitudinal direction when measuring several times (S500).

The inspection report output step includes storing the measured data in a storage unit in real time and outputting an inspection report including contents such as inspection coil, inspection time, inspector, inspection condition, plate graph, and good quality judgment. Is made of.

In addition to this, after the measurement is completed, the tension of the web product may be released, the touch roll may be opened, and the coil may be separated to finish the work.

The inventors of the present invention, the web plate measuring apparatus, require a high degree of precision as a measuring test equipment. It can be judged to be good and it is possible to perform good work in the secondary battery manufacturing process. Through this, it is possible to establish more reliable quality standards of the manufacturing process through the continuous measurement of the plate measurement apparatus.

10: measuring unit 11: laser displacement sensor
12: Proximity sensor 13: Zero position proximity sensor
20: unwinding part 30: winding-up part
40: control unit 50: input unit
60: output unit 70: first guide roll
80: second guide roll 90: tensile tension measuring sensor
100: zero bar
S100: Step of applying tensile tension to a web product
S200: step of moving the web product to the measurement inspection point
S300: measuring unit to measure the plate uniformity of the web (Web) products
S310: step of setting the zero point as a starting reference when measuring the uniformity
S311: step of confirming whether or not the position of the laser displacement sensor is at the zero point at which the proximity sensor is measured
S312: step of moving to the zero point if the position of the laser displacement sensor is not zero
S313: setting the current position of the laser displacement sensor to zero if it is determined that the position of the laser displacement sensor is at the zero position
S320: laser displacement sensor moves to measure the uniformity of the plate
S330: step of closing the measurement by the proximity sensor detects the position of the end of the width direction of the product
S400: measuring unit ends the measurement
S500: step of repeating the measurement the number of times set by the user
S600: measuring the uniformity of the measured plate

Claims (5)

delete delete delete delete (a) adjusting the unwinding unit 20 and the winding-up unit 30 through the control unit 40 to apply a tensile tension set in a web product;
(b) the control unit maintaining the set tensile tension and adjusting the unwinding unit 20 and the winding-up unit 30 to move the web product in a longitudinal direction to a measurement test point;
(c) measuring the flatness of the plate while the measuring unit 10 moves in the width direction of the web product; And
(d) returning to the zero position after the measurement by the measurement unit 10;
Including but not limited to:
The step (c)
A first zero point setting step in which the laser displacement sensor 11 measures a distance from the zero reference bar 100 to set a zero point as a reference for the plate uniformity deviation;
A second zero point setting step in which the laser displacement sensor 11 determines and sets a zero point, which is a starting point of measurement when measuring plate uniformity, by a proximity sensor for zero position check;
When the laser displacement sensor 11 moves in the width direction of the plate and the proximity sensor 12 detects the presence of the product, the laser displacement sensor 11 measures the uniformity of the plate from the beginning of the presence of the product. Measuring; And
When the laser displacement sensor 11 moves and the proximity sensor 12 checks the position of the end portion of the width direction of the product during measurement, the laser displacement sensor 11 is the width direction of the web product. Measuring to the end and ending the measurement;
Plate measurement method comprising a.

Images