JP2008139151A - Method and apparatus for measuring round blade gap of strip slitter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method and an apparatus capable of automatically performing measurement by inputting the width of a product and the number of strips. <P>SOLUTION: A Y axis rail is mounted to an X axis rail parallel to an upper arbor shaft, and a camera holding member is mounted thereto. A CCD camera is mounted on a lower part of the camera holding member, and a long linear lighting part parallel to the arbor shaft is provided so that a round blade gap part is irradiated with light rays at a position facing the CCD camera while sandwiching the round blade gap part between upper and lower round blades. Further, the apparatus includes an image processing means, a means for counting the number of counts N, a means for calculating X=A+1-N (A is the number of strips and N is the number of counts) and determining whether 1≤X or X<1, and a means for transmitting a signal for forwarding it by one pitch when 1≤X. When image processing is completed, the measured number N is counted, X=A+1-N is calculated, and it is determined whether 1≤X or X<1. When 1≤X, it is forwarded by one pitch. When the X=A+1-N becomes X<1, the measurement ends. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a method and apparatus for measuring a round blade gap of a strip slitter.

As a conventional technique of this type, there has been a method for measuring the relative position of a slitter round blade (Japanese Patent Laid-Open No. 5-312527). That is, light is irradiated from the plate passing direction, and the blade edge is magnified and imaged by a two-dimensional imager from the opposite side to obtain an image of the blade edges of two round blades in one screen. The virtual position in the image of the blade edge portion is obtained by comparison with the original pattern of the blade edge portion obtained in advance. The virtual edge position of the two round blades is obtained from the position information. As a result, the virtual clearance amount and the overlap amount are detected and converted into the actual amount using a correction function with the actual amount obtained at each measurement position.
JP-A-5-312527

  However, this technique does not disclose a specific technique for automatic feeding. In addition, when measuring one point at a time in the width direction, the light source also moves with respect to the movement of the two-dimensional imager, so there is a possibility that the positions of the two shift.

  An object of this invention is to provide the method and apparatus which can be automatically measured if a product width and the number of strips are input.

  The method of the first problem solving means of the present invention includes a step of issuing a command to move to a measurement start position, a step of determining whether or not it has stopped at a set position, a step of turning on a measurement start switch, and image processing A step, a step of determining whether the image processing is completed, a step of counting the number of measurements N if YES in the step, and calculating X = A + 1−N (A: number of lines, N: number of counts), 1 ≦ X or X <1 is judged, 1 ≦ X is fed by one pitch step, pitch feeding is judged to be completed, and if YES, the process returns to the front of the image processing step, and again, In each step, when X = A + 1−N becomes X <1, measurement END is set.

  The apparatus of the second means for solving the problems of the present invention supports a pair of upper and lower arbors having a horizontal axis rotatably on a stand at both ends, and upper and lower round blades are fixed to the upper and lower arbors, respectively. In the strip slitter, an X-axis rail provided parallel to the arbor axis and obliquely above the upper arbor axis; a Y-axis rail mounted on the X-axis rail and capable of moving in the X-axis direction; A camera holding member mounted on the Y-axis rail and movable in the Y-axis direction, an X-axis servo motor for moving the Y-axis rail, a Y-axis servo motor for moving the camera holding member, and the camera holding Arbor shaft provided to irradiate light to the gap between the CCD camera attached to the lower part of the member and the CCD camera at a position facing the CCD camera across the gap between the round blades between the upper and lower round blades Long straight parallel to The shape illumination unit, the image processing means, the means for counting the number of measurements N, and X = A + 1−N (A: number of stripes, N: number of counts) are calculated, and 1 ≦ X or X <1 is determined. And means for sending a signal to be sent by one pitch if 1 ≦ X.

  According to the present invention, if the product width and the number of strips are input, the round blade gap can be automatically measured.

  Embodiments of the present invention will be described below based on an embodiment shown in the drawings. In a strip slitter 1 shown in FIGS. 1 and 2, a stand 1b is erected on the upper surface of a carriage 1a, and a pair of upper and lower arbor shafts 1c and 1d having a horizontal axis are rotatably supported at both ends. In the upper and lower arbor shafts, two sets of an upper round blade 1g and a lower round blade 1h are respectively provided so as to feed the strip in a direction perpendicular to the drawing and slit one strip. The rubber upper spacer 1e and the lower spacer 1f are fixed to each other. Two clearances (clearances) CL1 and CL2 remain between the adjacent upper and lower round blades.

  Then, as shown in FIG. 3, the strip is sent from left to right (Z direction) in the drawing (the upstream side in the strip feed direction is the front and the downstream side is the rear). And the clearance measuring apparatus A of this invention is provided so that the clearance (gap) CL of adjacent upper round blade and lower round blade may be imaged. An X-axis rail 2 is provided parallel to the arbor shafts 1c and 1d and obliquely forward of the upper arbor shaft, and a Y-axis rail 3 is mounted perpendicularly to the X-axis rail and can move in the X-axis direction. It has become.

  A camera holding member 4 is mounted on the Y-axis rail 3 and is movable in the Y-axis direction. An X-axis servo motor 5 that moves the Y-axis rail 3 and a Y-axis servo motor 6 that moves the camera holding member 4 are provided.

  3 and 4, a CCD camera 12 is attached to the lower part of the camera holding member 4, and an illuminating device 11 is provided to irradiate a light beam from the rear to the boundary portion of the upper and lower arbor shafts. The clearance measuring device A includes an illumination device 11, an imaging device (camera) 12, an image processing device 13, a data management device 14, and a control device 15. The central processing unit 16 receives a signal from the image processing device 13 and sends a signal to the display unit 17. The illuminating device 11 irradiates light from the rear to the front of the upper and lower arbor shafts and the upper and lower boundary portions of the upper and lower round blades and images the light with an imaging device (CCD camera) 12. The part is provided parallel to the arbor axis.

  There is a difference in the amount of light in the clearance where light rays pass. The imaging device 12 reads the intensity of the light quantity and identifies the clearance portion from the read light quantity signal. The imaging device 12 has a CCD light receiving element that detects the intensity of reflected light and replaces it with an electrical signal.

  In FIG. 3, the light receiving angle is adjustable so that the light beam enters the camera 12 and is mounted on the camera holding member 4. That is, in the clearance portion, with respect to a virtual horizontal line passing through the clearance, the optical axis of the camera is in a virtual vertical plane including the horizontal line, and the optical axis is at an angle of 0 to 30 degrees above the horizontal line. Inclined. This tilt makes the clearance distinction clearer, but it is not necessarily tilted and may be horizontal.

  The imaging device 12 reflects the pseudo cross-sectional shape of the clearance portion formed by the voltage graph line by the incident light. In FIG. 4, the image processing apparatus 13 is connected to the CCD camera 12 and calculates the clearance width from the voltage graph line.

  The data management device 14 is connected to the image processing device 13 and stores data related to the width measured and calculated by the image processing device 13 so that the width can be always confirmed.

  The control device 15 is connected to the image processing device 13, and a set value of the clearance width is input to the control device 15, and the set value and the measured value are compared and calculated, and an allowable value (tolerance). If it exceeds, an alarm is generated by a signal.

〔Example〕
・ Lighting part: Fluorescent lamp ・ CCD camera Number of pixels: 2 million (1200 × 1600)
Image field of view: 4.8 x 5.4 to 9.6 x 12.8 mm
Resolution: 6.25μm (= 10mm / 1600) when the field width is 10mm

  Next, a method for measuring the round blade gap using this apparatus will be described. First, the slit width, the number of slit strips (A = 1), the clearance width, the clearance width tolerance, and the measurement start position (zero point) are set and input to the central processing unit 16. The illumination device 11, the imaging device 12, the image processing device 13, the data processing device 14, the control device 15, and the central processing unit 16 are operated.

  In the flowchart of FIG. 5, a command is issued to move to the measurement start position (measurement location 1) (CL1 in FIG. 1) (step 1). The X-axis servomotor 5 receiving this command sends the CCD camera 12 to the measurement start position (measurement location 1) together with the Y-axis rail 3. Then, it is determined whether or not the vehicle is stopped at this position (step 2). Check the measurement start position visually. Turn on the measurement start switch (step 3). Then, image processing is performed (step 4).

  That is, in step 4, the irradiation light of the illumination device 11 passes through the clearance and enters the camera. The imaging device 12 reads the intensity of the light quantity and identifies the clearance portion from the read light quantity signal. Due to the intensity of the reflected light, a pseudo sectional shape is projected. Then, this cross-sectional shape is sent to the image processing device 13, and the clearance width is measured in the image processing device.

  It is determined whether the image processing has been completed (step 5). If YES in this step, then the difference from the set value is calculated (step 6). Then, it is compared with the tolerance set value stored in the control device (step 7), and if it is within the allowable tolerance, the measured numerical value is displayed on the screen of the display unit 17 as it is (step 8). When the comparison calculation result exceeds the allowable value, an alarm signal is transmitted from the control device 15 and a red measurement value is displayed on the screen of the display unit 17 (step 9).

Next, “1” is counted as the measurement number count N (step 10). Next, X = A + 1−N (A: number of stripes, N: number of counts) is calculated, and 1 ≦ X or X <1 is determined (step S11), and X = A + 1−N = 1 + 1−1 = 1 Get. Then, the CCD camera 12 is sent by one pitch corresponding to the slit width (step 12), and the camera is moved to the measurement location 2 (CL2 in FIG. 1). Then, it is determined whether the pitch feed is completed (step 13).

If YES, the process returns to the position before the image processing step, and the above steps are performed again. When the image processing step is completed, “2” is counted as the measurement number count N (step 10). Next, X = A + 1−N (A: number of stripes, N: count number) is calculated, and X = A + 1−N = 1 + 1−2 = 0 is obtained. Since X = A + 1−N is X <1, measurement END is obtained.

Further, when the number of slit strips is 2 (A = 2), as shown in FIG. 6, the upper and lower arbor shafts each have two upper strips 1g and lower round so as to slit two strips. Three pairs of blades 1h are fixed with an upper spacer 1e and a lower spacer 1f made of rubber, respectively. Three clearances (clearances) CL1, CL2, CL3 remain between the adjacent upper and lower round blades. In this case, “3” is counted as the measurement number count N (step 10). Next, X = A + 1−N is calculated to obtain X = A + 1−N = 2 + 1−3 = 0. Since X = A + 1−N is X <1, measurement END is obtained.

  The present invention is not limited to the examples and embodiments described above, and includes various modifications without departing from the scope and scope of the claims.

  INDUSTRIAL APPLICABILITY The present invention can be used for a strip plate slitter clearance measuring method and apparatus.

It is a front view of the strip slitter equipped with this invention apparatus. It is the elements on larger scale of FIG. It is a side view which shows schematic structure of this invention apparatus. It is a block diagram which shows schematic structure of this invention apparatus. It is a flowchart. It is a principal part front view of the strip slitter of other Examples.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Strip slitter 1a Carriage 1b Stand 1c Upper arbor shaft 1d Lower arbor shaft 1e Upper spacer 1f Lower spacer 1g Upper round blade 1h Lower round blade CL clearance A Measuring device 2 X axis rail 3 Y axis rail 4 Camera holding member 5 X axis Servo motor 6 Y-axis servo motor 11 Illumination device 12 Imaging device (CCD camera)
13 Image processing device 14 Data management device 15 Control device 16 Central processing unit 17 Display unit

Claims (2)

Issuing a command to move to the measurement start position;
Determining whether or not the vehicle is stopped at the set position;
Turning on the measurement start switch;
Image processing step;
Determining whether the image processing is complete;
If YES in the step, a step of counting the number N of measurements,
Calculating X = A + 1−N (A: number of stripes, N: number of counts) and determining whether 1 ≦ X or X <1;
If 1 ≦ X, feed step by 1 pitch,
Determining whether pitch feed is complete;
If YES, return to the previous step of the image processing step, proceed to each step again,
A measurement method of a round blade gap of a strip slitter, wherein the measurement END is obtained when X = A + 1−N becomes X <1. In a strip slitter that supports a pair of upper and lower arbors having a horizontal axis rotatably on a stand at both ends, and fixed upper and lower round blades to the upper and lower arbors, respectively.
An X-axis rail provided parallel to the arbor axis and obliquely above the upper arbor axis;
A possible Y axis rail mounted on the X axis rail and moving in the X axis direction;
A camera holding member mounted on the Y-axis rail and movable in the Y-axis direction;
An X-axis servomotor that moves the Y-axis rail;
A Y-axis servomotor for moving the camera holding member;
A CCD camera attached to the lower part of the camera holding member;
A linear illuminator that is long in parallel to the arbor axis provided to irradiate the round blade gap with light at a position facing the CCD camera across the round blade gap between the upper and lower round blades;
Image processing means;
Means for counting the number N of measurements;
Means for calculating X = A + 1−N (A: number of stripes, N: number of counts) and determining whether 1 ≦ X or X <1;
A device for measuring a round blade gap of a strip slitter, comprising means for sending a signal to be sent by one pitch if 1 ≦ X.

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