JP4777826B2 - Sheet processing machine - Google Patents

Description

  The present invention relates to a sheet processing machine that performs drilling on a sheet attached to a honeycomb structure.

  There is an increasing need to remove particulates and harmful substances in exhaust gas from internal combustion engines, boilers and the like from the exhaust gas in consideration of environmental impact. In particular, regulations regarding the removal of particulates (hereinafter sometimes referred to as PM) emitted from diesel engines are in a direction to be strengthened both in the US and Europe, and a collection filter for removing PM (hereinafter referred to as DPF). A honeycomb structure is used.

  Various manufacturing methods are known for obtaining a ceramic body having a structure in which cells are alternately sealed at both end faces of the ceramic honeycomb structure. For example, a mask corresponding to each honeycomb structure is created by making a hole at a position corresponding to a predetermined cell of the sheet attached to the end face of the ceramic honeycomb structure, and the surface on which the mask is attached is used as a slurry for sealing. There is a method of dipping and filling a sealing slurry into a cell from a hole formed in a mask (Patent Document 1).

Japanese Patent No. 3715174

  When manufacturing by a method of drilling holes at a position corresponding to a predetermined cell of the sheet, it is necessary to drill 14,000 holes in the Φ270 mm class, but until now, inspection has been performed by visual inspection of the operator. In other words, drilling was automated, but automated inspection after drilling was not realized. After drilling, if the product is removed from the drilling machine and inspected, the presence or absence of holes and the size of the processed holes can be detected by image processing. ) Was difficult to detect. Furthermore, it is difficult to construct a coaxial incident optical system in the drilling machine, and it is difficult to ensure illumination and inspect on the drilling machine. In recent years, the requirements for the quality of plugging have become stricter, and accordingly, the accuracy required for drilling has become stricter.

  An object of the present invention is to provide a sheet processing machine capable of improving the accuracy of position detection in laser processing and performing drilling and inspection.

In order to solve the above problems, according to the present invention,
Positioning means for positioning the honeycomb structure at a photographing position and a processing position with one end face of the honeycomb structure formed in a columnar shape in a predetermined direction;
Laser oscillation means for drilling a sheet by irradiating a laser beam to the sheet attached to the end face of the honeycomb structure; and
Diffuse illumination for irradiating the end face of the honeycomb structure positioned at the photographing position with oblique light;
A light branching portion movable on the longitudinal axis of the honeycomb structure positioned at the photographing position;
Epi-illumination that is installed outside the axis and illuminates the end face coaxially with the axis with the reflected light reflected by the light branching portion arranged on the axis,
A photographing means for photographing the end face,
The honeycomb structure is positioned at the photographing position, the light branching portion is arranged at the first position outside the axis, and the first image of the end surface is photographed by photographing means by irradiating oblique light to the end surface by diffuse illumination,
By recognizing the cell position of the honeycomb structure by performing image processing on the first image, the honeycomb structure is positioned at the processing position, and drilling of the sheet affixed to the end face is performed by the laser oscillation means based on the cell position. ,afterwards,
The light splitting part arranged at the second position on the axis reflects the light emitted from the epi-illumination and irradiates the end face, and the second image of the end face is photographed by the photographing means by the reflected light from the end face that has passed through the light splitting part. And the sheet processing machine which performs a punching inspection by image-processing a 2nd image is provided.

In the sheet processing machine of the present invention, more specifically,
The shooting position and the processing position are determined as different positions.
The photographing means is disposed on the axis of the honeycomb structure positioned at the photographing position,
The laser oscillation means is disposed on the axis of the honeycomb structure positioned at the processing position so that the optical axis of the laser beam is along the axis,
The positioning means captures the first image of the honeycomb structure at the photographing position, positions the honeycomb structure at the processing position, performs drilling by the laser oscillation means, and returns to the photographing position to photograph the second image. It is possible to adopt a configuration that does.

  In this case, the moving direction from the photographing position of the honeycomb structure to the processing position by the positioning means can be configured to be determined in a direction orthogonal to the axis.

Furthermore, in the sheet processing machine of the present invention,
The shooting position and the processing position are determined as the same position,
With a movable mirror on the axis of the honeycomb structure positioned at the shooting position,
The photographing means is disposed outside the axis of the honeycomb structure positioned at the photographing position,
The end face taken by the photographing means by reflecting the reflected light from the end face of the diffuse illumination with the mirror in the state where the light branching portion is arranged at the first position on the axis of the honeycomb structure in which the mirror is positioned at the photographing position. The first image of
After recognizing the cell position of the honeycomb structure, drilling is performed by the laser oscillation means in a state where the mirror is arranged off the axis, and then
The light splitting part arranged at the second position on the axis reflects the light emitted from the epi-illumination and irradiates the end face, and the reflected light from the end face that has passed through the light splitting part is further reflected by the mirror arranged on the axis. Then, it is possible to adopt a configuration in which a second image of the end face is photographed by photographing means, and the second image is subjected to image processing to perform a drilling inspection.

  In the above configuration, the dark color image portion of the first image can be recognized as the cell position. Further, the dark image of the second image can be recognized as a hole formed by drilling with a laser beam. Furthermore, the light branching unit can be configured by a triangular prism or a half mirror.

  In the sheet processing machine of the present invention, the honeycomb structure is positioned at the photographing position by the positioning means, the light branching portion is disposed at the first position outside the axis, and the oblique light is irradiated to the end surface by the diffused illumination. A first image of the end face can be taken. By irradiating the end surface with oblique light by diffuse illumination, it is possible to photograph the inside of the cell of the honeycomb structure as a dark color image portion and the partition of the cell as a light color image portion.

  Then, by processing the first image, after recognizing the cell position of the honeycomb structure from the dark color image portion and the light color image portion, the honeycomb structure is positioned at the processing position, and the recognized cell position is Based on this, it is possible to perform drilling of the sheet affixed to the end face by the laser oscillation means.

  Further, the light branching portion arranged at the second position on the axis reflects the light emitted from the epi-illumination to irradiate the end face, and the second image of the end face is captured by the reflected light from the end face that has passed through the light branching portion. Can be taken. Since the coaxial epi-illumination is used, the contrast of the holes other than the holes becomes clear, and it is possible to photograph accurately. Then, image processing is performed on the second image, the dark color image portion is recognized as a hole formed by drilling, and it is determined whether or not the hole is formed at a predetermined position with respect to the cell position. It is possible to determine whether or not the processing by drilling has been performed normally.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to the following embodiments, and changes, modifications, and improvements can be added without departing from the scope of the invention. The “honeycomb structure” referred to in the present specification includes not only a fired body but also an unfired dried body (one obtained by drying only the extruded body of the clay and not yet fired).

  FIG. 1 shows a sheet processing machine 1 according to an embodiment of the present invention. The sheet processing machine 1 includes a placement portion 2 for placing the honeycomb structure 21, a motor 3 for moving the placement portion 2 along the guide shaft 4, and an epi-illumination for irradiating the end face 22 of the honeycomb structure 21. Camera 11 for photographing the end surface 22 of the honeycomb structure 21 on the photographing position, and a beam splitter (light branching portion) 15 for reflecting the light emitted from the illumination light 11, the diffuse illumination 12, and the epi-illumination light 11. 6. A laser (laser oscillation means) 7 for performing laser processing on the processing position is provided.

  The placement section 2 is configured to place a honeycomb structure 21 that is not plugged, and to move between a photographing position and a processing position by the motor 3 along the guide shaft 4. The moving direction of the honeycomb structure 21 from the photographing position to the processing position by the positioning means is determined in a direction orthogonal to the axis. Thereby, the honeycomb structure 21 can be positioned at each position. That is, the mounting portion 2, the guide shaft 4, and the motor 3 are arranged so that the one end face 22 of the honeycomb structure 21 formed in a columnar shape is directed in a predetermined direction so that the honeycomb structure 21 is set to the photographing position and the processing position. A positioning means for positioning is configured.

  The laser 7 which is a laser oscillation means is disposed on the axis of the honeycomb structure 21 positioned at the processing position so that the optical axis of the laser light is along the axis, and is affixed to the end face 22 of the honeycomb structure 21. The sheet 24 is punched by irradiating the sheet 24 with laser light.

As the laser 7 used in the sheet processing machine 1 of the present embodiment, for example, a YAG laser, a CO ₂ laser, or a UV laser can be suitably used. By using such a laser 7, for example, a hole can be formed in the sheet 24 attached to the end face of the honeycomb structure 21. Moreover, since this laser 7 can use suitably the commercially available laser marker, for example, the laser marker of a galvanometer mirror scanning system, etc., the cost reduction of the sheet processing machine 1 is realizable. In order to make the laser processed surface constant, it is preferable to provide a mechanism for detecting and adjusting the height direction of the upper end surface 22 of the honeycomb structure 21 in the mounting portion 2 of the positioning means.

  The diffuse illumination 12 irradiates the end surface of the honeycomb structure 21 positioned at the photographing position with oblique light. The diffuse illumination includes, for example, an LED serving as a light source and a light diffuser that diffuses light from the LDE. Alternatively, a lamp light source such as halogen or mercury, or an inexpensive fluorescent lamp with stable brightness can be used as the diffuse illumination.

  The beam splitter 15 which is an optical branching portion is configured to be movable on the longitudinal axis of the honeycomb structure 21 positioned at the photographing position. That is, the first position outside the axis and the second position on the axis can be moved. The beam splitter 15 separates incident light into transmitted light and reflected light, and can be constituted by a triangular prism, a half mirror, or the like. Specifically, a plurality of triangular prisms can be bonded to form a cube-type beam splitter, and the bonded surface can be used as a split surface to divide the light beam into reflected light and transmitted light. Alternatively, when a plate-like half mirror is used, it can be configured at a lower cost than when a triangular prism is used.

  The incident illumination 11 includes, for example, an LED serving as a light source. The epi-illumination illumination 11 can irradiate the end face 22 of the honeycomb structure 21 with the beam splitter 15 when the beam splitter 15 is disposed at the second position. Further, as the camera 6 constituting the photographing means, a CCD camera can be suitably used.

  In order to punch the sheet 24 by irradiating the sheet 24 affixed to the end face 22 of the honeycomb structure 21 with laser light by the sheet processing machine 1, first, a ceramic honeycomb structure 21 ( A ceramic honeycomb structure before firing) is prepared. As the ceramic honeycomb structure 21, a conventionally known ceramic honeycomb structure made of cordierite can be preferably used. The ceramic honeycomb structure 21 can be produced in the same manner as before by extruding the raw material from the die after mixing.

  As shown in FIG. 2A, a sheet 24 having substantially the same shape as the end face 22 of the ceramic honeycomb structure 21 is prepared, and as shown in FIG. A sheet 24 is affixed to the end face 22. A commercially available adhesive sheet can be used as the sheet 24. Then, as shown in FIG. 1, the honeycomb structure 21 is placed on the placement portion 2 of the sheet processing machine 1 and drilling is performed by the laser 7.

  Next, a laser processing process is demonstrated using the flowchart of FIGS. FIG. 3 shows an overall process of the laser processing process. The sheet processing machine 1 performs a cell position confirmation step of the unplugged honeycomb structure 21 placed on the placement portion 2 (S1), and based on the result, performs a punching step, A hole is formed in (S2). Subsequently, a hole inspection process is performed, and it is determined whether or not the hole is formed at a predetermined position with respect to the cell position, and it is determined whether or not the processing by the hole drilling is normally performed (S3). ). Next, details of each of these steps will be described with reference to FIGS.

  First, details of the cell position confirmation step of S1 will be described with reference to FIG. The sheet processing machine 1 moves the honeycomb structure 21 placed on the placement unit 2 to the photographing position by the motor 3 (S11: see FIG. 1). Next, the beam splitter 15 is set to the first position (S12), and the diffuse illumination 12 is turned on (S13). And the 1st image of the end surface 22 of the honeycomb structure 21 irradiated with the diffuse illumination 12 is image | photographed (S14).

  FIG. 7 schematically shows an example of the first image of the end face 22 taken by diffuse illumination. The diffused illumination 12 allows the end face 22 to be photographed through the sheet 24. The end face 22 is photographed with the partition wall portion 22a as a bright color image portion and the inside of the cell 22b as a dark color image portion. That is, in S15 of FIG. 4, the sheet processing machine 1 can recognize the dark color image portion as in the cell 22b. Then, a hole is formed in a position corresponding to the predetermined cell 22b of the sheet 24 in the drilling process (S2).

  The detail of the drilling process of S2 is demonstrated using FIG. The sheet processing machine 1 moves the honeycomb structure 21 mounted on the mounting unit 2 to the processing position by the motor 3 (S21: see FIG. 1). Based on the recognition result of recognizing the cell position of the honeycomb structure 21 by performing image processing on the first image, the sheet 24 affixed to the end face 22 is punched (S22). Then, the sheet processing machine 1 again moves the honeycomb structure 21 placed on the placement unit 2 to the photographing position by the motor 3 (S23).

  Next, details of the drilling inspection process in S3 will be described with reference to FIG. The sheet processing machine 1 arranges the beam splitter 15 at the second position on the longitudinal axis of the honeycomb structure 21 positioned at the photographing position (S31), turns on the incident illumination 11 (S32), and the camera 6 A second image is taken at (S33).

  FIG. 8 schematically shows an example of the second image of the end face 22 taken by epi-illumination. The epi-illumination 11 can pass through the sheet 24 and photograph the end face 22. That is, the beam splitter 15 emits light coaxially with the axis, so that the outer edge of the hole 25 can be clearly photographed. The sheet 24 is photographed as a light color image portion, and the end face 22 is photographed as a light color image portion whose partition wall portion 22 a is slightly darker than the sheet 24. Further, since the hole 25 formed in the sheet 24 is photographed through the cell 22b on the rear side, the hole 25 is photographed as a dark color image portion. That is, in S <b> 34, the sheet processing machine 1 can recognize the dark color image portion as the hole 25.

  Returning to FIG. 6, after performing image analysis in S <b> 34, the sheet processing machine 1 determines whether or not a predetermined cell is drilled, the size of the hole, and the positional deviation are equal to or less than a predetermined reference ( S35). If it is less than the predetermined standard (S35: YES), the honeycomb structure 21 is discharged as a defective product (S36). On the other hand, when it is determined that the predetermined standard is satisfied (S35: NO), the honeycomb structure 21 is recovered as a non-defective product (S36), and the process proceeds to the next step.

  Next, the plugging process of the honeycomb structure 21 will be described with reference to FIG. 9A, FIG. 9B, and FIG. As shown in FIG. 9A, the non-defective product that has been determined to have been normally punched in the previous step has holes 25 formed in the sheet 24. FIG. 9B is a cross-sectional view taken along the line AA in FIG.

  And about this good product, as shown to Fig.10 (a), the end surface 22 which stuck the sheet | seat 24 which opened the hole 25 is immersed in the slurry 26 in the container 27. FIG. The slurry 26 is a raw material for forming a plugged portion, for example, cordierite, cordierite forming raw material, silicon carbide, silicon nitride, alumina, mullite, aluminum titanate, lithium aluminum silicate, and the like, a binder, a dispersion medium, and the like are added. It is a sealant. Then, as shown in FIG. 10 (b), the slurry 26 is press-fitted into the cells 22 b through the holes 25 of the sheet 24 by pressing the ceramic honeycomb structure 21 using the pressing means 28. Then, as shown in FIG.10 (c), the plugging with respect to the end surface 22 is complete | finished by peeling the sheet | seat 24 from an end surface.

  Thereafter, the same plugging is performed on the other end faces to obtain a ceramic honeycomb structure 21 in which predetermined cells 22b on both end faces are filled with the slurry 26. Finally, by firing the ceramic honeycomb structure 21 in which predetermined cells 22b are filled with the slurry 26 at both end faces, the cells 22b are alternately sealed at both end faces of the target ceramic honeycomb structure 21. A ceramic body can be obtained. Such a ceramic body is mainly used as a DPF (diesel particulate filter) used for removing graphite and the like of a diesel engine.

  As described above, by photographing the first image using the diffuse illumination 12, the cell position can be clearly photographed. Moreover, the hole 25 can be clearly image | photographed by image | photographing as coaxial epi-illumination using the illumination 11 for epi-illumination. Therefore, the sheet processing machine 1 can perform the drilling with high accuracy and can perform the drilling inspection automatically by image processing.

  Next, a sheet processing machine 50 according to another embodiment is shown in FIG. The sheet processing machine 50 includes a placement unit 2 for placing the honeycomb structure 21, a motor 3 for moving the placement unit 2 along the guide shaft 4, and an epi-illumination for irradiating the end face 22 of the honeycomb structure 21. A beam splitter (light branching portion) 15 for reflecting the light emitted from the illumination 11 for the illumination 11, the diffuse illumination 12 and the epi-illumination 11, and the photographing position and the processing position are determined as the same position. A laser (laser oscillation means) 7 for performing laser processing on the processing position), and a camera (imaging means) 6 for photographing the end face 22 of the honeycomb structure 21 outside the axis of the honeycomb structure 21 positioned at the photographing position. . A movable mirror 16 is provided on the axis of the honeycomb structure 21 positioned at the photographing position.

  The placement unit 2 can place the honeycomb structure 21 and move by the motor 3 along the guide shaft 4 to position the honeycomb structure 21 at the photographing position (processing position).

  The laser 7 which is a laser oscillation means is disposed on the axis of the honeycomb structure 21 positioned at the processing position so that the optical axis of the laser light is along the axis, and is affixed to the end face 22 of the honeycomb structure 21. The sheet 24 is punched by irradiating the sheet 24 with laser light.

  The diffuse illumination 12 irradiates the end surface 22 of the honeycomb structure 21 positioned at the photographing position with oblique light. The beam splitter 15 which is an optical branching portion is configured to be movable on the longitudinal axis of the honeycomb structure 21 positioned at the photographing position. That is, the first position outside the axis and the second position on the axis can be moved. The epi-illumination illumination 11 can irradiate the end face 22 of the honeycomb structure 21 with the beam splitter 15 when the beam splitter 15 is disposed at the second position.

  The mirror 16 is configured to be movable on the longitudinal axis of the honeycomb structure 21 positioned at the photographing position. That is, the first position outside the axis and the second position on the axis can be moved. By moving the mirror 16 to the second position, an image of the end face 22 can be taken by the camera 6 due to the reflection of the mirror 16.

  Since the sheet processing machine 50 pierces the sheet 24 by irradiating the sheet 24 affixed to the end surface 22 of the honeycomb structure 21 with laser light, the end surface 22 of the honeycomb structure 21 is the same as in the above-described embodiment. The sheet 24 is affixed to the sheet processing machine 50 (see FIG. 2) and placed on the placement unit 2 of the sheet processing machine 50.

  Next, the laser processing process of this embodiment is demonstrated using the flowchart of FIGS. FIG. 12 shows the entire process of the laser processing process. The sheet processing machine 50 divides the end surface 22 of the honeycomb structure 21 placed on the placement unit 2 into a plurality of blocks, performs a cell position confirmation process on the first block (T1), and based on the result Then, a hole forming process is performed to form holes in the sheet (T2). Subsequently, a hole inspection process is performed, and it is determined whether or not the hole is formed at a predetermined position with respect to the cell position, and it is determined whether or not the processing by the hole drilling is normally performed (T3). ). The sheet processing machine 50 determines whether or not the laser processing has been completed for all the blocks. If not (T4: NO), the sheet processing machine 50 moves to the adjacent block (T5) and returns to T1. If all blocks have been completed (T4: YES), the laser processing step is terminated. Next, details of each of these steps will be described with reference to FIGS.

  First, details of the T1 cell position confirmation step will be described with reference to FIG. The sheet processing machine 50 moves the honeycomb structure 21 placed on the placement unit 2 to the photographing position (also the processing position in this embodiment) by the motor 3 (T11: see FIG. 11). Next, the mirror 16 is set to the second position, the beam splitter 15 is set to the first position (T12), and the diffuse illumination 12 is turned on (T13). And the 1st image of the end surface 22 of the honeycomb structure 21 irradiated with the diffuse illumination 12 is image | photographed with the camera 6 through the mirror 16 (T14).

  Also in this embodiment, the first image by the diffuse illumination similar to that of FIG. 7 of the above-described embodiment is obtained. That is, the end face 22 is photographed with the partition wall portion 22a as a light color image portion and the inside of the cell 22b as a dark color image portion. That is, at T15 in FIG. 13, the sheet processing machine 50 can recognize the dark color image portion as the inside of the cell 22b. At this time, a drilling pattern is determined based on the reference point of the end face 22. And a hole is formed in the position corresponded in the predetermined cell 22b of the sheet | seat 24 in a drilling process (T2).

  The detail of the drilling process of T2 is demonstrated using FIG. The sheet processing machine 50 moves the mirror 16 to the first position outside the axis and the beam splitter 15 to the first position outside the axis (T21: see FIG. 11). Based on the recognition result of recognizing the cell position of the honeycomb structure 21 by performing image processing on the first image, punching of the sheet 24 attached to the end face 22 is performed (T22).

  Next, details of the drilling inspection process of T3 will be described with reference to FIG. The sheet processing machine 50 arranges the mirror 16 at a second position on the longitudinal axis of the honeycomb structure 21 positioned at the photographing position. Similarly, the beam splitter 15 is arranged at the second position on the axis (T31). The epi-illumination 11 is turned on (T32), and the camera 6 takes a second image (T33).

  Also in this embodiment, a second image by epi-illumination similar to that in FIG. 8 of the above-described embodiment is obtained. That is, since the light is emitted coaxially with the axis by the beam splitter 15, the outer edge of the hole 25 can be clearly photographed. The sheet 24 is photographed as a light color image portion, and the end face 22 is photographed as a light color image portion whose partition wall portion 22 a is slightly darker than the sheet 24. Further, since the hole 25 formed in the sheet 24 is photographed through the cell 22b on the rear side, the hole 25 is photographed as a dark color image portion. That is, at T34, the sheet processing machine 50 can recognize the dark color image portion as the hole 25.

  Returning to FIG. 15, after performing image analysis at T <b> 34, the sheet processing machine 50 compares the cell position information with the hole information based on the second image, and determines whether or not a predetermined cell is drilled, the size and position of the hole. It is determined whether or not the deviation is equal to or less than a predetermined reference (T35). When it is below the predetermined standard (T35: YES), the honeycomb structure 21 is discharged as a defective product (T36). On the other hand, when it is determined that the predetermined standard is satisfied (T35: NO), the honeycomb structure 21 is recovered as a non-defective product (T36), and the process proceeds to the next step.

  If it is determined at T4 in FIG. 12 that all blocks have not been completed, the block moves to the adjacent block as shown in FIG. 16 (T5), and the same process is performed. At this time, the sheet processing machine 50 keeps the mirror 16 and the beam splitter 15 on the same axis as the laser 7, and the processed hole 25 that can be seen by the epi-illumination for a camera area slightly larger than the processing area. Is detected and the hole-processed cell is specified. Then, the low-angle illumination (diffuse illumination 12) is turned on to detect the cell position, and the drilling pattern is determined based on the processed cell. And the above-mentioned drilling process is performed similarly.

  When all the blocks are finished (T4: YES), the honeycomb structure 21 is plugged similarly to the above-described embodiment, and the ceramic honeycomb structure 21 in which the slurry 6 is filled in the predetermined cells 3 on both end faces is obtained. obtain. Finally, by firing the ceramic honeycomb structure 21 in which predetermined cells 22b are filled with the slurry 6 at both end faces, the cells 22b are alternately sealed at both end faces of the target ceramic honeycomb structure 21. A ceramic body can be obtained.

  As described above, by photographing the first image using the diffuse illumination 12, the cell position can be clearly photographed. Moreover, the hole 25 can be clearly image | photographed by image | photographing as coaxial epi-illumination using the illumination 11 for epi-illumination. Therefore, the sheet processing machine 50 can perform the drilling with high accuracy and can perform the drilling inspection by image processing. In this embodiment, since the photographing position and the processing position are configured to be the same, the time required for photographing and processing can be shortened. Furthermore, since the honeycomb structure 21 is not moved in the photographing process and the processing process, it is possible to prevent an error due to positioning and perform a drilling process and a drilling inspection with high accuracy.

  INDUSTRIAL APPLICABILITY The present invention can be used as a sheet processing machine that performs laser processing at a predetermined position using a laser, and in particular, when manufacturing a honeycomb structure used as a DPF used for removing graphite or the like of a diesel engine. In addition, it can be used as a sheet processing machine for drilling a sheet attached to a honeycomb structure.

It is a figure which shows the sheet processing machine as one Embodiment of this invention. It is a figure which shows sticking of the sheet | seat to a honeycomb structure. It is a figure which shows the honeycomb structure to which the sheet | seat was affixed. It is a flowchart which shows a laser processing process. It is a flowchart which shows the detail of a cell position confirmation process. It is a flowchart which shows the detail of a drilling process. It is a flowchart which shows the detail of a drilling test process. It is a schematic diagram of the 1st image by diffuse illumination. It is a schematic diagram of the 2nd image by epi-illumination. It is a figure which shows the honeycomb structure which the drilling process was complete | finished. It is AA sectional drawing of Fig.9 (a). Fig. 10 (a) is a diagram showing a plugging process of the honeycomb structure, Fig. 10 (b) is a diagram showing a process following Fig. 10 (a), and Fig. 10 (c) is plugged. It is a figure which shows a honeycomb structure. It is a figure which shows the sheet processing machine of other embodiment of this invention. It is a flowchart which shows the laser processing process of other embodiment. It is a flowchart which shows the detail of the cell position confirmation process of other embodiment. It is a flowchart which shows the detail of the drilling process of other embodiment. It is a flowchart which shows the detail of the drilling test process of other embodiment. It is a figure explaining a block.

Explanation of symbols

1: sheet processing machine, 2: placement unit, 3: motor, 4: guide shaft, 6: camera, 7: laser, 11: illumination for illumination, 12: diffuse illumination, 15: beam splitter, 16: mirror, 21 : Honeycomb structure, 22: end face, 22a: partition wall, 22b: cell, 24: sheet, 25: hole, 26: slurry, 50: sheet processing machine.

Claims (7)

Positioning means for positioning the honeycomb structure at a photographing position and a processing position with one end face of the honeycomb structure formed in a columnar shape in a predetermined direction;
Laser oscillation means for drilling the sheet by irradiating a laser beam on the sheet affixed to the end face of the honeycomb structure;
Diffuse illumination for irradiating the end face of the honeycomb structure positioned at the photographing position with oblique light;
A light branching portion movable on the longitudinal axis of the honeycomb structure positioned at the photographing position;
Epi-illumination that is installed outside the axis and illuminates the end face coaxially with the axis with reflected light reflected by the light branching portion disposed on the axis;
Photographing means for photographing the end face;
The honeycomb structure is positioned at the photographing position, the light branching portion is disposed at a first position outside the axis, and oblique light is irradiated onto the end face by the diffuse illumination, and the first end of the end face is irradiated by the photographing means. Take a picture,
After recognizing the cell position of the honeycomb structure by performing image processing on the first image, the honeycomb structure is positioned at the processing position, and the sheet attached to the end surface is punched based on the cell position. Processing is performed by the laser oscillation means, and then
The light splitting portion disposed at the second position on the axis reflects the light emitted from the epi-illumination to irradiate the end face, and the end face is reflected by the reflected light from the end face that has passed through the light splitting section. A sheet processing machine for taking a hole inspection by taking two images by the photographing means and processing the second image. The shooting position and the processing position are determined as different positions,
The photographing means is disposed on the axis of the honeycomb structure positioned at the photographing position,
The laser oscillation means is disposed on the axis of the honeycomb structure positioned at the processing position so that the optical axis of the laser beam is along the axis,
The positioning means, after taking the first image of the honeycomb structure at the photographing position, positioning the honeycomb structure at the processing position, performing the drilling by the laser oscillation means, and then taking the photographing The sheet processing machine according to claim 1, wherein the sheet processing machine is returned to a position to capture the second image.   The sheet processing machine according to claim 2, wherein a movement direction of the honeycomb structure from the photographing position to the processing position by the positioning unit is determined in a direction orthogonal to the axis. The shooting position and the processing position are determined as the same position,
A movable mirror on the axis of the honeycomb structure positioned at the photographing position;
The photographing means is disposed outside the axis of the honeycomb structure positioned at the photographing position,
The reflected light from the end face of the diffuse illumination is reflected by the mirror in a state where the light branching portion is disposed at the first position on the axis of the honeycomb structure in which the mirror is positioned at the photographing position. Image processing the first image of the end face reflected and photographed by the photographing means;
After recognizing the cell position of the honeycomb structure, the drilling is performed by the laser oscillation means in a state where the mirror is disposed outside the axis, and then,
The light branching portion arranged at the second position on the axis reflects the light emitted from the incident illumination and irradiates the end face, and further reflects the reflected light from the end face that has passed through the light branching portion. 2. The sheet processing machine according to claim 1, wherein the sheet processing machine performs reflection of the second image of the end surface by the imaging unit, and performs the drilling inspection by performing image processing on the second image. .   The sheet processing machine according to any one of claims 1 to 4, wherein a dark color image portion of the first image is recognized as the cell position.   The sheet processing machine according to any one of claims 1 to 5, wherein a dark color image of the second image is recognized as a hole formed by the drilling process using the laser beam.   The sheet processing machine according to claim 1, wherein the light branching unit is configured by a triangular prism or a half mirror.

Images