KR100910507B1 - Apparatus for measuring build-up on coated steel sheet - Google Patents

Abstract

The present invention relates to a plated steel coil build-up measuring device for automatically measuring the build-up by measuring the distance profile of the entire width in the width direction of the steel sheet, and accurately grasp the position and size of the build-up generated on the surface of the plated steel sheet. ,

An apparatus for measuring the build-up of a coiled steel sheet 8 coil of the present invention, comprising: a fixed plate PF1; First moving means moving in a direction perpendicular to the fixing plate PF1; A moving plate PF2 moved by the first moving means; Second moving means for moving in the longitudinal direction of the moving frame (PF2); A measuring assembly 30 moved by the second moving means; Distance measuring means (40) mounted to the measuring assembly for measuring a distance to the steel sheet; Edge detecting means (50) mounted to the measuring assembly to detect a widthwise edge of the steel sheet; A steel plate surface shape measuring means (60) mounted to the measuring assembly to measure a surface shape of the steel plate; The first moving means is controlled with reference to the distance by the distance measuring means, and the second moving means is controlled according to whether the edge is detected by the edge detecting means, and then the surface of the steel sheet is controlled while controlling the second moving means. The measurement is carried out in a plurality of steps, in which each step receives the surface shape of the steel plate by the steel plate surface shape measuring means, and signalizes the surface shape to calculate the distance value to calculate the distance profile, and the distance at each step. A main controller 70 for obtaining a steel sheet width direction total distance profile from the profile; And a screen display unit 80 which outputs the steel sheet width direction overall distance profile obtained by the main controller 70 to the screen. The gist is provided.

Plated steel sheet, build up, measure, inspect, width direction, distance profile

Description

Build-up measuring device for plated steel coils {APPARATUS FOR MEASURING BUILD-UP ON COATED STEEL SHEET}

1 is a schematic view showing a general zinc plating process.

2 is an exemplary view of buildup of a plated steel coil.

3 is a perspective view showing a conventional build-up measurement method.

4 is a block diagram of a build-up measuring apparatus according to the present invention.

5 is a conceptual diagram of distance profile measured in accordance with the present invention.

6 is an operation flowchart of the build-up measuring apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

8: plated steel sheet 10: build up

W: width of buildup H: height of buildup

11: first motor controller (Y axis) 12: first motor

13: 1st moving shaft 21: 2nd motor controller (X axis)

22: second motor 23: second moving shaft

30 measurement assembly 40 line laser device

41: line type laser light source 50: proximity sensor                 

60: CCD camera 70: main controller

71: Image grabber 80: Screen display

PF1: Fixed Plate PF2: Moving Plate

P1: first distance profile P2: second distance profile

P3: third distance profile PN: Nth distance profile

PALL: full distance profile

The present invention relates to a coiled-up coil build-up measuring device, in particular by measuring the distance profile of the entire width in the width direction of the steel sheet to automatically measure the build-up, it is possible to minimize the error due to vibration more accurate build-up measurement In addition, by accurately identifying the location and size of the build-up generated on the surface of the plated steel sheet, it is possible to reduce build-up defects by providing basic data for analyzing the cause of the build-up. The present invention relates to a plated steel coil build-up measuring apparatus capable of eliminating the risk of manual labor.

Usually, during the process of winding the plated steel sheet in the form of a coil after the galvanizing process, which is the last step of the cold rolling process, a so-called build up occurs in which a certain portion is bulged without maintaining a uniform profile in the width direction of the steel sheet. .

FIG. 1 is a schematic view showing a general galvanizing process. Referring to FIG. 1, a general galvanizing process is performed by passing a strip through a heating furnace 6 facility through a galvanizing bath 3, and a galvanizing bath ( 3) After cooling the strip by the cooling device (5) installed in the upper part of the process proceeds to the next step, as the final step required after winding the coiled steel sheet (8) by the winder (1) equipment As much as it is cut by the cutter (2).

In addition, in addition to the required weight of the coiled steel sheet (8), the steel sheet (8) having various defects occurring in the galvanizing bath (3) equipment and defects occurring in all processes are cut by the cutter (2). Although the surface inspection of the coil-shaped steel sheet 8 wound in the winder 1 facility is performed inside an inspection table (not shown), the inspection for the build-up 10 is impossible. When the coil-shaped steel sheet 8 in which the build-up 10 is generated is released, the build-up 10 is generated in a wave shape, thereby losing its value as a product.

FIG. 2 is an exemplary view of a buildup of a plated steel coil, which is a steel plate 2 which has undergone a steelmaking plating process and is wound in a coil form in a tension reel 1 in a coil form. It is an illustration. Here, W is the width of the buildup 10 and H is the height of the buildup 10.

Referring to FIG. 2, the buildup is a phenomenon in which a portion of the steel sheet thicker than the periphery of the steel sheet 5 in the length direction of the steel sheet is wound at a predetermined length (4) or more while being stacked in a coil shape. The cause of buildup can be divided into nonuniformity of plating thickness and nonuniform thickness of raw material steel plate. The buildup that occurs mainly is the widthwise edge of the steel plate and the middle area of the steel plate, but since the generation area is gradually spread evenly, the entire width direction of the steel plate must be inspected to measure the buildup.

Figure 3 is a perspective view showing a conventional build-up measurement method, referring to Figure 3, after the operator (7) to go directly to the site to thoroughly inspect the product to check the state of the coiled steel sheet 8 is wound When it is determined that the buildup 10 is minutely generated, the degree of occurrence of the buildup 10 is confirmed by contacting the buildup 10 generating portion of the surface of the coil-shaped steel sheet 8 using the ruler 9. If it is determined that the buildup 10 is severe and cannot be a product, it is cut using the cutter 2 and rewound.

However, in confirming the build-up 10 occurrence state by the conventional build-up measuring method as described above, since the winding machine 1 equipment is in a state of being driven continuously, the worker 7 builds up the ruler 9. (10) There is a problem that the operator (7) avoids the build-up (10) measurement work because there is always a risk of a safety accident in contact with the occurrence site, thereby reducing the reliability of the product.

In addition, in another conventional build-up measuring apparatus, an operator applies a straight line to the surface of the steel sheet wound in the form of a coil in parallel in the width direction, and visually checks the gap between the straight line and the surface of the steel sheet, or the width of the steel sheet. The build-up was measured through a distance profile measured at points at regular intervals while scanning the distance sensor in the direction.

However, this conventional technique has a problem that it is inaccurate in measuring the buildup of 0.1mm level because it includes a lot of errors due to the vibration of the steel sheet and the vibration of the distance measuring sensor, and also, in the case of an experienced worker, builds into the eye masses. Although it is possible to find the location where the up occurs and measure its size very precisely using a thickness gauge, it is a safety accident because the steel plate is stopped in a coil-shaped actuator for a while and a person enters directly around the actuator to make a measurement. There was a problem that was very dangerous.

Accordingly, in order to solve the inaccuracy of the build-up measurement through the distance profile measured for a certain distance point using the scanning distance measuring sensor, the point-type distance measuring method causes a large measurement error due to mechanical vibration. The present invention is proposed to solve the advantages.

The present invention has been made to solve the above problems, an object of the present invention by measuring the distance profile for the entire width in the width direction of the steel sheet to automatically measure the build-up, it is possible to minimize the error due to vibration It is to provide a coiled steel coil build-up measuring device capable of accurate build-up measurement.

In addition, another object of the present invention is to accurately determine the location and size of the build-up generated on the surface of the plated steel sheet, it is possible to reduce the build-up defects by providing basic data for analyzing the cause of the build-up, such automatic measurement It is to provide a coiled steel coil build-up measuring device that can eliminate the risk of manual labor through the operator.

As a technical means for achieving the object of the present invention described above, the present invention is an apparatus for measuring the build-up of a coiled steel sheet coil wound, the fixing plate; First moving means moving in a direction perpendicular to the fixing plate; A moving plate moved by the first moving means; Second moving means for moving in the longitudinal direction of the moving frame; A measuring assembly moved by the second moving means; Distance measuring means mounted on the measuring assembly to measure a distance to the steel sheet; Edge detecting means mounted to the measuring assembly to detect a widthwise edge of the steel sheet; Steel sheet surface shape measuring means mounted on the measuring assembly to measure the surface shape of the steel sheet; The first moving means is controlled with reference to the distance by the distance measuring means, and the second moving means is controlled according to whether the edge is detected by the edge detecting means, and then the surface of the steel sheet is controlled while controlling the second moving means. The measurement is carried out in a plurality of steps, in which each step receives the surface shape of the steel plate by the steel plate surface shape measuring means, and signalizes the surface shape to calculate the distance value to calculate the distance profile, and the distance at each step. A main controller for obtaining a steel sheet width direction total distance profile from the profile; And a screen display unit for outputting a steel sheet width direction total distance profile obtained by the main controller to a screen. Characterized in having a.

Hereinafter, with reference to the accompanying drawings for the build-up measuring device of a plated steel coil according to the present invention will be described in detail the configuration and operation. In the drawings referred to in the present invention, components having substantially the same configuration and function will use the same reference numerals.

4 is a configuration diagram of the build-up measuring apparatus according to the present invention, referring to FIG. 4, the build-up measuring apparatus of the plated steel coil according to the present invention is fixed to the fixed plate PF1 and the fixed plate PF1. To the first moving means moving in the direction of rotation, the moving plate PF2 moved by the first moving means, the second moving means moving in the longitudinal direction of the moving frame PF2, and the second moving means. A measuring assembly 30 moved by the measuring assembly, a distance measuring means 40 mounted on the measuring assembly to measure a distance to the steel sheet, and an edge mounted on the measuring assembly to detect a widthwise edge of the steel sheet. The first moving number with reference to the detection means 50, the steel plate surface shape measuring means 60 mounted on the measuring assembly for measuring the surface shape of the steel plate, and the distance by the distance measuring means. And controlling the second moving means according to edge detection by the edge detecting means, and then measuring the steel plate surface in a plurality of steps while controlling the second moving means, in each step of the steel plate surface. The main controller 70 calculates the distance profile by receiving the surface shape of the steel sheet by the shape measuring means and signal processing the surface shape to calculate the distance value. And a screen display unit 80 for outputting the steel sheet width direction overall distance profile obtained by the main controller 70 to the screen.

The first moving means includes a first motor controller 11 for providing a driving signal under control of the main controller, a first motor 12 fixed to the fixed plate, and driven by the first motor controller; One end may be connected to the rotating shaft of the first motor, and may be installed in a vertical direction to the fixing plate, and the other end thereof may include a first moving shaft 13 connected to the moving plate.

The first moving shaft 13 includes, for example, a thread on the surface thereof, and a connection of the moving plate connected to the first moving shaft 13 includes a bolt structure, so that the first moving shaft 13 As the) rotates, the moving plate moves forward and backward in the Y-axis direction. In addition, in order to ensure stable support and movement of the moving plate, it may include an idle moving shaft 13c separate from the first moving shaft 13, which may be a belt or a belt from the first moving shaft 13. The driving force can be transmitted by the chain 13b.

The second moving means is a second motor controller 21 for providing a driving signal under the control of the main controller, and a second fixed to one side in the longitudinal direction of the moving plate, and driven by the second motor controller. One end may be connected to the motor 22 and the rotation shaft of the second motor, and the other end thereof may include a second moving shaft 23 connected to the other side in the longitudinal direction of the moving plate. In this case, the measuring assembly 30 is installed on the second moving shaft of the second moving means. Here, the second moving shaft 23 may be supported by the support means (23a, 23b) installed on both ends of the moving plate.

The second moving shaft 23 includes, for example, a thread on its surface, and a connection of the measuring assembly connected with the second moving shaft 23 includes a bolt structure, so that the second moving shaft 23 As the) rotates, the measurement assembly reciprocates in the X-axis direction.

The distance measuring means 40 may use a line type laser device for laser-launching and receiving a laser returning by the steel sheet, and the edge detecting means 50 is provided on both sides of the steel sheet surface shape measuring means 30. Each of the two proximity sensors may be installed, and the steel plate surface shape measuring means 60 may use a CCD camera for photographing a line laser shape formed on the steel plate surface. The main controller 70 is configured to derive the distance profile Q for the full width of the steel sheet from the distance profile Pij for each step obtained by the steel sheet surface shape measuring means 60.

In addition, the main controller 70 determines whether or not a buildup has occurred and the location and size of the generated buildup based on the distance profile Q, and stores the buildup information and the distance profile and simultaneously controls the screen display. do.

5 is a conceptual diagram of distance profile measured according to the present invention, Figure 6 is a flow chart of the operation of the build-up measuring apparatus according to the present invention.

Operation of the preferred embodiment of the present invention configured as described above will be described in detail below based on the accompanying drawings.

Referring to Figures 4 to 6, first, the build-up measuring device of the plated steel sheet coil of the present invention is equipped with the measuring device of the present invention, in order to measure the build-up of the plated steel sheet 8 is wound The measuring assembly is moved to the measuring position.

Referring to Figure 4, the distance measuring means 40 of the present invention is mounted to the measuring assembly to measure the distance to the steel sheet and transmits to the main controller 70 of the present invention, the main controller 70 is the The first moving means is controlled with reference to the distance by the distance measuring means.

Specifically, for example, in the case of using a line type laser device as the distance measuring means 40, the line type laser device is reflected by the surface of the steel sheet after the laser is emitted back To calculate the distance by calculating the firing time of the laser, the laser receiving time, and transmits the distance information to the main controller 70. Here, the distance calculation may be performed in the main controller using the firing time of the laser and the laser light receiving time, which may be performed differently according to the characteristics and functions of the apparatus or component to be applied.

At this time, the main controller 70 compares the calculated distance information with a preset measurement distance, and based on the difference between the measurement distance and the set distance according to the comparison, the first motor controller of the first moving means ( When the motor drive is controlled by 11), the first motor controller 11 provides a drive signal to the first motor 12 under the control of the main controller. At this time, according to the operation of the first motor 12, the first moving shaft 13 connected to the rotating shaft rotates, and the moving plate PF2 is plated steel plate 8 by the rotation of the first moving shaft 13. The moving plate PF2 moves to the measurement position on the Y axis while moving away from or near () (S61 in FIG. 6).

Then, when the edge detecting means 50 of the present invention is mounted to the measuring assembly to detect the widthwise edge of the steel sheet to provide to the main controller 70, the main controller 70 is the edge detecting means 50 The second moving means is controlled until the edge detection is performed.

In detail, the main controller 70 controls the driving of the motor by the second motor controller 21 of the second moving means based on the edge detection signal from the edge detecting means 50. The motor controller 21 provides a driving signal to the second motor 22 according to the control of the main controller, and at this time, the second moving shaft 23 connected to the rotating shaft according to the operation of the second motor 22. Is rotated, and the measurement assembly of the present invention is moved in the width direction of the plated steel sheet 8 by the rotation of the second moving shaft 23. Due to this operation, the assembly is moved to the measurement start position on the X axis. (S62 of FIG. 6).                     

For example, when the edge detecting means 50 includes proximity sensors provided at both sides of the steel sheet surface shape measuring means 60, the main controller 70 moves off the left proximity sensor when the main controller 70 moves to the left edge. The movement is controlled until it is detected, and when moving to the right edge of the steel sheet, the edge is detected by controlling the movement until the right proximity sensor is turned off. As such, when an edge, which is a measurement initial position, is detected, a widthwise scan of the surface of the plated steel sheet in the opposite edge direction is performed at that point.

Next, the widthwise scan operation for measuring the surface build-up of the plated steel sheet will be described. A plurality of steps are sequentially performed one step from one edge of the steel sheet as a starting point to the other edge of the steel sheet as a final point. The distance profile at each of these steps is as shown in FIG. Obtained by scanning.

Herein, the surface scan operation in each step will be described. First, the steel plate surface shape measuring means 60 measures the surface shape of the steel plate and provides the surface shape to the main controller 70. The steel sheet surface measurement is performed in a plurality of steps while controlling the second moving means, and in each step, the surface shape of the steel sheet is input by the steel sheet surface shape measuring means, and the surface shape is signal-processed to calculate the distance value. Calculate The calculation of the distance value will be described later.

In detail, first, the linear laser device which is the distance measuring means 40 emits a line laser on the surface of the steel sheet, and the CCD camera which is the steel plate surface shape measuring means 60 is formed on the surface of the steel sheet. Taking a line-shaped laser shape is transmitted to the main controller 70, that is, when the laser beam device shoots a line-type laser light source on the surface of the steel sheet, the laser line is formed in the width direction on the surface of the steel sheet as shown in FIG. The CCD camera 60 photographs the line laser 41 formed on the steel sheet and transmits an image signal to the main controller (S63, S64 and S65 in FIG. 6).

The main controller 70 receives the surface shape of the steel sheet by the CCD camera and signal-processes the surface shape to calculate a distance value to calculate a distance profile. This process is performed by performing a plurality of predetermined steps step by step. Steps are carried out (S66 and 67 in Fig. 6).

The image grabber of the main controller 70 can obtain 30 still images per second from the CCD camera, and calculates a distance profile for each step obtained by a constant interval scan, and calculates one full width of the steel sheet. Find the distance profile.

Normally, the image grabber 71 can take 30 shots per second. From the image obtained through the image grabber 71, the distance values for all points on the laser line 41 formed on the surface of the steel sheet are known. Calculate by triangulation. After one predetermined measurement time, the measuring assembly equipped with the laser device and the CCD camera is moved by a third moving means in the width direction of the steel sheet. When the step movement is completed, the above process is repeated again. The distance profile for the full width of the steel sheet is obtained (S68 of FIG. 6).

The steel sheet width direction total distance profile is obtained from the distance profile in each of these steps. The main controller 70 has the distance profiles P1 and P2 made by the i-th step and consists of M points. If the j-th point is Pij and the coordinate value is (Xij, Yij), the measurement result to be derived from the build-up measuring device has a profile shape on a straight line so that the location and height information of the build-up can be seen at a glance. Will be displayed as. In other words, the distance profile from one edge of the steel sheet to the opposite edge is displayed according to a predetermined specification. If the points of the distance profile PALL to be finally derived are Q and the coordinate values of Q are (Xk, Yk), the number of points Q is N * M and the coordinate values of each point are shown in Equation 1.

Where k = i * N + j, i = 0 to N-1, j = 0 to M-1

On the basis of the steel plate width direction total distance profile obtained by the main controller 70, it is determined whether the buildup has occurred and the position and size of the generated buildup. The buildup information and the distance profile are stored, and the screen display is controlled. In response to the control of the main controller 70, the screen display unit 80 outputs a distance profile, whether a buildup occurs, and when the buildup occurs, the position and size information of the buildup on the screen (S69 of FIG. 6). .

Referring to FIG. 5, when the width direction scan of the steel sheet is completed according to the movement of the steel plate surface shape measuring means 60, a width direction distance profile as shown in FIG. The linear distance profile can eliminate the distance measurement error caused by the vibration of the conventional point-type distance profile.

As described above, the present invention compensates for the disadvantage that the point-type distance profile is different from the distance value depending on whether or not vibration occurs, even though the points of the same distance are different from the conventional method in which the measurement of the points spaced apart from each other at the same time is performed. For this purpose, since the points on the laser line made in the line type laser device are information obtained at the same time, there is a great advantage of creating a distance profile regardless of whether or not vibration occurs.

According to the present invention as described above, by measuring the distance profile of the entire width in the width direction of the steel sheet to automatically measure the build-up, it is possible to minimize the error due to vibration, there is an effect that more accurate build-up measurement is possible .

In addition, by accurately understanding the location and size of the build-up generated on the surface of the plated steel sheet, it is possible to reduce build-up defects by providing basic data for analyzing the cause of the build-up. There is an effect that can eliminate the risk caused by.

The above description is only a description of specific embodiments of the present invention, and the present invention is not limited to these specific embodiments, and various changes and modifications of the configuration are possible from the above-described specific embodiments of the present invention. It will be apparent to those skilled in the art to which the present invention pertains.

Claims (9)

In the apparatus for measuring the build-up of the coiled steel sheet 8 coil wound, Fixing plate PF1; First moving means moving in a direction perpendicular to the fixing plate PF1; A moving plate PF2 moved by the first moving means; Second moving means for moving in the longitudinal direction of the moving frame (PF2); A measuring assembly 30 moved by the second moving means; Distance measuring means (40) mounted to the measuring assembly for measuring a distance to the steel sheet; Edge detecting means (50) mounted to the measuring assembly to detect a widthwise edge of the steel sheet; A steel plate surface shape measuring means (60) mounted to the measuring assembly to measure a surface shape of the steel plate; The first moving means is controlled with reference to the distance by the distance measuring means, and the second moving means is controlled according to whether the edge is detected by the edge detecting means, and then the surface of the steel sheet is controlled while controlling the second moving means. The measurement is carried out in a plurality of steps, in which each step receives the surface shape of the steel plate by the steel plate surface shape measuring means, and signalizes the surface shape to calculate the distance value to calculate the distance profile, and the distance at each step. A main controller 70 for obtaining a steel sheet width direction total distance profile from the profile; And A screen display unit 80 for outputting a steel sheet width direction total distance profile obtained by the main controller 70 to a screen; Build-up measurement device for a plated steel coil, characterized in that provided with. The method of claim 1, wherein the first moving means A first motor controller 11 for providing a driving signal according to the control of the main controller; A first motor 12 fixed to the fixed plate and driven by the first motor controller; One end is connected to the rotating shaft of the first motor, is installed in the vertical direction to the fixed plate, the other end of the first moving shaft 13 is connected to the moving plate; build of the plated steel coil Up measuring device. The method of claim 1, wherein the second moving means A second motor controller 21 for providing a driving signal according to the control of the main controller; A second motor 22 fixed to one side of the moving plate in a longitudinal direction and driven by the second motor controller; One end is connected to the rotary shaft of the second motor, the other end of the second moving shaft 23 is connected to the other side in the longitudinal direction of the moving plate; Build-up measuring apparatus of the coated steel sheet coil comprising a. The method of claim 3, wherein the measurement assembly 30 The build-up measuring device of the plated steel coil, characterized in that installed on the second moving shaft of the second moving means. The method of claim 1, wherein the distance measuring means 40 A build-up measuring device for a coated steel sheet coil, which is a line type laser device which emits a laser beam and receives a laser beam returned by the steel sheet. The method of claim 1, wherein the edge detecting means 50 Build-up measurement device of the plated steel coil, characterized in that it comprises two proximity sensors respectively provided on both sides of the steel sheet surface shape measuring means (30). The method of claim 1, wherein the steel sheet surface shape measuring means 60 Build-up measuring device for a plated steel coil, characterized in that the CCD camera for photographing the line laser shape formed on the surface of the steel sheet. The method of claim 1, wherein the main controller 70 is From the distance profile Pij for each step obtained by the steel sheet surface shape measuring means 60, the distance profile Q for the full width of the steel sheet is given by the following equation, that is, Xk = Xij, Yk = Yij (where , k = i * N + j, i = 0 ~ N-1, j = 0 ~ M-1) build-up measuring device of the plated steel coil, characterized in that derived by.       Where M is the number of points in the distance profile created by the ith step           N: number of steps in the width direction with respect to the surface of the plated steel sheet          X: direction in which the measurement assembly reciprocates as the second moving shaft connected to the measurement assembly rotates          Y: direction in which the moving plate moves forward and backward as the first moving shaft connected to the moving plate rotates    (Xij, Yij): Coordinate of Pij           (Xk, Yk): Coordinate value of Q The method of claim 1, wherein the main controller 70 is Based on the distance profile (Q), it is determined whether the build-up has occurred and the location and size of the generated build-up, thereby storing the build-up information and the distance profile and controlling the screen display. Buildup measurement device.

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