JP4332947B2 - Manufacturing method of dies for forming honeycomb structure and groove processing apparatus - Google Patents

Description

[0001]
【Technical field】
The present invention relates to a mold manufacturing method and a groove processing method for extruding a ceramic honeycomb structure used, for example, in a catalyst carrier of an automobile exhaust gas purification device.
[0002]
[Prior art]
Conventionally, for example, Japanese Patent Laid-Open No. 11-073504 has proposed a method for manufacturing a honeycomb structure forming mold. This is a method of manufacturing a die for forming a honeycomb structure by using a wire electric discharge machining technique and a joining technique for divided plate-like metal block bodies.
[0003]
[Problems to be solved]
However, in order to form an ultrafine groove by wire electric discharge machining, it is necessary to use an ultrafine wire, which significantly reduces the machining speed.
In addition, in order to obtain a highly accurate forming groove, it is necessary to finish after roughing, and it is necessary to apply a plurality of times to the same forming groove, so the productivity becomes very poor.
On the other hand, as a highly productive processing method, there is a method of irradiating a metal material with a high-density energy beam. However, in this groove processing with a high-density energy beam, there is a problem that the accuracy of the forming groove deteriorates due to the influence of a melt or the like by the high-density energy beam.
[0004]
The present invention has been made in view of the above-described conventional problems, and has a honeycomb structure molding die, a manufacturing method thereof, and a groove processing apparatus capable of performing high-precision groove processing with high productivity. It is something to be offered.
[0005]
[Means for solving problems]
The invention according to claim 1 is arranged between the supply holes for supplying the material, the lattice-shaped forming grooves for forming the material into a honeycomb shape, and the supply holes along the shape of the forming grooves. In a method of manufacturing a honeycomb structure forming mold having a formed lower groove,
The supply hole is formed from one surface of the base plate, the lower groove having a groove width wider than the forming groove is formed from the other surface, and the lower groove communicates with the supply hole in the thickness direction of the base plate. Let
Next, the upper plate is joined to the lower groove forming surface in which the lower groove is opened in the base plate,
Next, when processing the molding groove by irradiating a high-density energy beam so as to penetrate the lower groove from the surface of the upper plate ,
Manufacturing of a die for forming a honeycomb structure, wherein the assist gas is supplied also from the irradiation side while ensuring the flow of the assist gas supplied from the lower groove side to the irradiation portion to the irradiation side Is in the way.
The invention of claim 2 is arranged between the supply holes for supplying the material, the lattice-shaped forming grooves for forming the material into a honeycomb shape, and the supply holes along the shape of the forming grooves. In a method of manufacturing a honeycomb structure forming mold having a formed lower groove,
The supply hole is formed from one surface of the base plate, the lower groove having a groove width wider than the forming groove is formed from the other surface, and the lower groove communicates with the supply hole in the thickness direction of the base plate. Let
Next, the upper plate is joined to the lower groove forming surface in which the lower groove is opened in the base plate,
Next, when processing the molding groove by irradiating a high-density energy beam so as to penetrate the lower groove from the surface of the upper plate,
A shielding plate having an opening around the high-density energy beam irradiated portion is disposed on the surface of the upper plate, and the forming groove is processed while the shielding plate is moved along with the movement of the high-density energy beam. The present invention is directed to a method for manufacturing a mold for forming a honeycomb structure.
The invention of claim 3 is arranged between the supply holes for supplying the material, the lattice-shaped forming grooves for forming the material into a honeycomb shape, and the supply holes along the shape of the forming grooves. In a method of manufacturing a honeycomb structure forming mold having a formed lower groove,
The supply hole is formed from one surface of the base plate, the lower groove having a groove width wider than the forming groove is formed from the other surface, and the lower groove communicates with the supply hole in the thickness direction of the base plate. After the formation of the lower groove, an anti-adhesive agent for preventing adhesion of the melt is applied to the inner wall of the lower groove,
Next, the upper plate is joined to the lower groove forming surface in which the lower groove is opened in the base plate,
Next, there is a manufacturing method of a die for forming a honeycomb structure, wherein the forming groove is processed by irradiating a high density energy beam so as to pass through the surface of the upper plate to the lower groove.
[0006]
The most notable aspect of the present invention is that the base plate is provided with the lower groove having a groove width wider than the forming groove, and the high density energy is transmitted from the surface of the upper plate joined to the lower groove forming surface to the lower groove. It is processing the said shaping | molding groove | channel by irradiating a beam.
[0007]
As the high-density energy beam, various beams such as a laser beam and an electron beam can be used.
As the upper plate, a steel plate such as carbon steel, ceramics such as alumina, or the like can be used.
[0008]
Next, the operation of the present invention will be described.
In the present invention, as described above, a lower groove having a groove width wider than the forming groove is provided in advance, and a material in a state where the upper plate is covered thereon is used. Then, the high-density energy beam is irradiated from the front side of the upper plate. Therefore, the high-density energy beam can be irradiated so as to penetrate into the lower groove having a wide groove width. Therefore, it is possible to easily obtain the beam diameter and output conditions suitable for the forming accuracy of the forming groove, and to eliminate the melt well, and to obtain a very accurate groove width. .
[0009]
In addition, high-density energy beams are much more productive than conventional wire electrical discharge machining.
Further, since the beam diameter, output, etc. of the high-density energy beam can be easily controlled, the width of the forming groove to be obtained can be easily changed. Therefore, it is possible to easily cope with the manufacturing of a plurality of molds for forming a honeycomb structure having different groove widths.
[0010]
Therefore, according to the present invention, it is possible to provide a method for manufacturing a honeycomb structure forming die that is highly productive and can perform highly accurate groove processing.
[0011]
According to a fourth aspect of the present invention, it is preferable that the cross-sectional area of the groove of the lower groove is at least 2.5 times the cross-sectional area of the groove of the forming groove. If the cross-sectional area of the groove in the lower groove is less than 2.5 times the cross-sectional area of the groove in the forming groove, the melt may remain in the lower groove or the forming groove during processing by high-density energy beam irradiation. There is a problem.
[0012]
Further, as in the invention of claim 5 , the forming groove can be processed while supplying the assist gas from at least the lower groove side opposite to the irradiation side to the irradiated portion of the high-density energy beam. preferable.
For example, air, oxygen, argon, or the like can be used as the assist gas.
[0013]
In this case, the supply of the assist gas exhibits an effect of discharging and removing the molten material melted by the irradiation of the high-density energy beam to the irradiation side of the high-density energy beam, that is, the surface side of the upper plate. Therefore, the groove processing by the high-density energy beam can be performed without being adversely affected by the remaining of the melt, and a more accurate groove width can be obtained.
[0014]
In the first aspect of the invention , the assist gas is also supplied from the irradiation side while ensuring the flow of the assist gas supplied from the lower groove side to the irradiation portion to the irradiation side . In this case, the melt discharged to the surface side of the upper plate can be efficiently scattered, and the groove processing accuracy can be improved.
[0015]
According to a sixth aspect of the invention, the assist gas is supplied from the lower groove side using a movable nozzle, and the assist gas is moved while the nozzle is moved along with the movement of the high-density energy beam. It is preferable to supply gas. In this case, the supply of the assist gas can be concentrated in a limited part by always arranging the nozzle in the irradiation part of the high-density energy beam, and the supply pressure of the assist gas can be easily improved. .
[0016]
In the invention of claim 2 , a shielding plate having an opening around the high-density energy beam irradiated portion is disposed on the surface of the upper plate, and the shielding plate is moved along with the movement of the high-density energy beam. The forming groove is processed while being moved . In this case, it is possible to concentrate the flow of the assist gas on the portion irradiated with the high-density energy beam by suppressing the flow of the assist gas from the forming groove that has already been processed. Thereby, the discharge and removal effect of the melt by the assist gas can be further enhanced.
[0017]
According to a third aspect of the present invention , after the formation of the lower groove, an adhesion preventing agent for preventing adhesion of a melt is applied to the inner wall of the lower groove . In this case, even if the melt that has come to the inner wall of the lower groove may adhere, the inner wall of the lower groove can be easily restored to a healthy state by removing the adhesion preventing agent after processing.
Examples of the anti-adhesive agent include a brazing material that can be melted and removed at a relatively low temperature, or a welding spatter preventing liquid.
[0018]
Next, the invention of claim 7 is provided between the supply holes for supplying the material, the lattice-shaped forming grooves for forming the material into a honeycomb shape, and the supply holes along the shape of the forming grooves. An apparatus for processing the forming groove of the honeycomb structure forming die having a lower groove disposed in
The supply hole and the lower groove are formed in advance, and the mold material having the upper plate for forming the groove on the surface side of the lower groove is transmitted from the surface of the upper plate to the lower groove. A beam irradiation means for irradiating a high-density energy beam,
Moving means for moving the beam irradiation means along the lower groove;
The have a gas supply means for supplying at least the irradiation side and the opposite side of the assist gas from the lower groove side against the irradiated portion of the high density energy beam, the gas supply means, from the lower groove side against the irradiated portion A groove processing apparatus for a honeycomb structure molding die, wherein the assist gas is supplied from the irradiation side while ensuring the flow of the assist gas to be supplied to the irradiation side. .
The invention according to claim 8 is provided between the supply holes for supplying the material, the lattice-shaped forming grooves for forming the material into a honeycomb shape, and the supply holes along the shape of the forming grooves. An apparatus for processing the forming groove of a honeycomb structure forming die having a formed lower groove,
The supply hole and the lower groove are formed in advance, and the mold material having the upper plate for forming the groove on the surface side of the lower groove is transmitted from the surface of the upper plate to the lower groove. A beam irradiation means for irradiating a high-density energy beam,
Moving means for moving the beam irradiation means along the lower groove;
Gas supply means for supplying an assist gas from at least the lower groove side opposite to the irradiation side with respect to the irradiation portion of the high-density energy beam;
A shielding plate having an opening around the high-density energy beam irradiated portion is disposed on the surface of the upper plate, and the forming groove is processed while the shielding plate is moved along with the movement of the high-density energy beam. The present invention provides a groove processing apparatus for a honeycomb structure forming mold.
[0019]
The most notable aspect of the groove processing apparatus of the present invention is that it has a beam irradiation means for irradiating the high-density energy beam and a moving means for moving the same, and a gas supply means for supplying an assist gas from the lower groove side. It is to have.
If the groove processing apparatus of this invention is used, said outstanding manufacturing method can be implemented easily.
[0020]
Next, as in the ninth aspect of the invention, it is preferable that the beam diameter and output of the high-density energy beam emitted from the beam irradiating means can be changed. In this case, according to the depth and width of the forming groove to be obtained, a high-density energy beam having an optimum beam diameter can be launched at an optimum output. Even if the manufacturing conditions change, excellent accuracy can always be obtained.
[0021]
In the invention of claim 7, the gas supply means supplies the assist gas also from the irradiation side while ensuring the flow of the assist gas supplied from the lower groove side to the irradiation portion to the irradiation side. It is configured . Specifically, this can be realized by disposing a gas supply means in the beam irradiation means. In this case, similarly to the above, the melt discharged to the surface side of the upper plate can be efficiently scattered, and the groove machining accuracy can be improved.
[0022]
According to a tenth aspect of the present invention, the gas supply means has a movable nozzle for supplying an assist gas from the lower groove side, and the nozzle is used for moving the high-density energy beam. It is preferable that it is provided so as to be movable. In this case, the supply of the assist gas can be concentrated in a limited part by always arranging the nozzle in the irradiation part of the high-density energy beam, and the supply pressure of the assist gas can be easily improved. .
[0023]
As in the invention of claim 11 , the nozzle is preferably provided coaxially with the beam irradiation means. In this case, the nozzle can reliably follow the movement of the high-density energy beam.
[0024]
In the invention of claim 8 , a shielding plate having an opening around the irradiated portion of the high density energy beam is disposed on the surface of the upper plate, and the shielding plate is moved along with the movement of the high density energy beam. However, the forming groove is processed . In this case, as described above, the flow of the assist gas from the forming groove that has already been processed can be suppressed and the flow of the assist gas can be concentrated on the portion irradiated with the high-density energy beam.
[0025]
Next, as the honeycomb structure molding die obtained by the above excellent manufacturing method, there is the following invention.
That is , a supply hole for supplying the material, a lattice-shaped forming groove for forming the material into a honeycomb shape, and a lower groove disposed between the supply hole along the shape of the forming groove. In the honeycomb structure forming mold having
The lower groove has a groove cross-sectional area 2.5 times wider than the cross-sectional area of the groove of the molding groove,
There is a die for forming a honeycomb structure, wherein the forming groove is processed by irradiation with a high-density energy beam, and a vertical streak as a processing streak is formed on an inner wall.
Since this honeycomb structure molding die can be manufactured by the above-described excellent manufacturing method, it can be excellent in dimensional accuracy and low in cost.
[0026]
The cross-sectional shape of the molding groove can be incident side of the high density energy beam is a narrow tapered.
[0027]
Further , the forming groove forming portion may be made of carbon steel, and the inner wall of the forming groove may be formed with a hardened layer that is rapidly cooled and solidified after melting. In this case, the presence of the hardened layer can improve the wear resistance of the forming groove, and can extend the life of the honeycomb structure forming die.
[0028]
DETAILED DESCRIPTION OF THE INVENTION
Embodiment Example A honeycomb structure forming mold, a manufacturing method thereof, and a groove processing apparatus according to an embodiment example of the present invention will be described with reference to FIGS.
As shown in FIG. 2, a honeycomb structure forming mold 1 manufactured in this example includes a supply hole 2 for supplying a material, a lattice-shaped forming groove 4 for forming the material into a honeycomb shape, A lower groove 3 is provided between the supply hole 2 along the shape of the molding groove 4.
[0029]
The lower groove 3 has a groove cross-sectional area that is 2.5 times larger than the cross-sectional area of the formed groove 4. The formed groove 4 is processed by irradiation with a high-density energy beam and the inner wall is processed. Longitudinal streaks are formed (not shown). Moreover, although the cross-sectional shape of the shaping | molding groove | channel 4 is a little, the incident side of the said high-density energy beam is a taper shape narrow.
[0030]
In manufacturing the honeycomb structure forming mold 1, as shown in FIG. 1A, first, a base plate 5 made of carbon steel (SKD-61) was prepared. As this size, a square having a side of 150 to 300 mm and a thickness of 10 to 30 mm is used. Then, a supply hole 2 having a diameter of 0.3 to 1.5 mm is formed from one surface (back surface 52) of the base plate 5. The supply hole 2 is formed by a drill. Further, the supply hole 2 is formed halfway in the thickness direction so as not to penetrate the surface side.
[0031]
Next, as shown in FIG. 1B, the lower groove 3 having a groove width wider than the molding groove 4 to be obtained is formed from the other surface (surface: lower groove forming surface) 51 of the base plate 5. The supply hole 2 is communicated with the base plate 5 in the thickness direction. In this example, the lower groove 3 was formed by milling. This processing can also be performed by other methods such as electric discharge machining using a thin plate electrode or wire electric discharge machining.
[0032]
Next, as shown in FIG. 1C, an upper plate 6 made of carbon steel is prepared. A size smaller than the base plate 5 is used. For example, a square having a side of 50 to 200 mm or a circle having a diameter of 50 to 200 mm and a thickness of 1.0 to 5.0 mm can be used. Then, the upper plate 6 is joined to the lower groove forming surface 51 in which the lower groove 3 is opened in the base plate 5. This joining was performed by a copper brazing method. This bonding can also be performed by other bonding methods such as a thermal diffusion bonding method.
[0033]
Next, as shown in FIG. 1D, a forming groove 4 is provided along the shape of the lower groove 3. A groove processing device 7 for the forming groove 4 is shown in FIG.
As shown in the figure, the groove processing device 7 includes a beam irradiation means 71 for irradiating a high-density energy beam 9 so as to pass through the surface of the upper plate 6 to the lower groove 3, and the beam irradiation means 74 along the lower groove 3. Moving means (not shown). Further, a gas supply means 72 is provided for supplying the lower assist gas 81 from the lower groove 3 side opposite to the irradiation side to the irradiated portion of the high-density energy beam 4 and supplying the upper assist gas 82 from the irradiation side. .
[0034]
The beam irradiation means emits a high-density energy beam 9 made of a laser beam (YAG laser) having a variable output from a launch source (not shown), and can be adjusted to a desired beam diameter by a beam condensing lens 710. Has been.
An upper nozzle 722 is provided around the condenser lens 710 so that the upper assist gas 82 can be supplied around the high-density energy beam 9. Further, the lower assist gas 81 is configured to be supplied from the lower nozzle 721.
[0035]
Further, the lower nozzle 721 is biased toward the base plate 5 by a coil spring 725. Further, the opening of the lower nozzle 721 is larger than the formation pitch of the supply holes 2 and is configured to face at least one supply hole 2 regardless of the position.
[0036]
The gas supply means 72 having the lower nozzle 721 and the upper nozzle 722 is provided so as to be movable along with the movement of the high-density energy beam 9 emitted from the beam irradiation means 71. Specifically, the lower nozzle 721 and the upper nozzle 722 are provided coaxially with the beam irradiation means, and are provided to move in the left-right direction in synchronization.
The groove processing device 7 is provided with a table 79 for fixing the base plate 5. The base plate 5 can be fixed by screwing bolts 78 passed through the through holes 59 of the base plate 5 to the table 79.
[0037]
And when processing the said shaping | molding groove | channel using this groove | channel processing apparatus 7, as shown in FIG. 3, while irradiating the high-density energy beam 9 according to the output permeate | transmitted to the lower groove | channel 3 from the surface of the upper board 6, While the upper assist gas 82 and the lower assist gas 81 are supplied from above and below to the irradiated portion of the high-density energy beam 9, the beam irradiation means 71 and the gas supply means 72 are moved relative to the upper plate 6. While processing.
Here, the output of the YAG laser as the high-density energy beam 9 is, for example, 45 W when the thickness of the upper plate 6 is 1.5 mm, so that a through groove is easily formed in the upper plate 6. be able to.
[0038]
Further, the upper assist gas 82 is supplied from the upper nozzle 722 while ensuring the flow of the upper assist gas 81 supplied from the lower nozzle 721 to the irradiation portion to the irradiation side. Specifically, in the case of this example, the lower assist gas 81 can be blown upward by supplying the upper and lower pressures at a pressure of 7 kgf / cm ² . This is because, as shown in FIG. 3, the lower nozzle 721 is arranged in a state of being in close contact with the base plate 5 by the urging force of the coil spring 725, so The lower assist gas 81 can be supplied, while the upper nozzle 722 is arranged at a certain distance from the upper plate 6 so that the lower assist gas 81 is not blown so strongly as to prevent the lower assist gas 81 from being blown upward. .
[0039]
By supplying the assist gases 81 and 82, the melt 65 melted by the irradiation of the high-density energy beam 9 can be discharged and removed to the irradiation side of the high-density energy beam 9, that is, the surface side of the upper plate 6. . Therefore, the groove processing by the high-density energy beam 9 can be performed without being adversely affected by the remaining of the melt 65, and a highly accurate groove width can be obtained.
Further, by taking advantage of the high productivity and controllability of the high-density energy beam 6, the productivity can be improved and the manufacturing cost can be reduced.
[Brief description of the drawings]
BRIEF DESCRIPTION OF DRAWINGS FIG. 1 is an explanatory diagram showing a method for manufacturing a honeycomb structure forming mold in an embodiment.
FIG. 2 is a partially cutaway cross-sectional view of a honeycomb structure forming mold in an embodiment.
FIG. 3 is an explanatory view showing a groove processing apparatus for forming grooves in the embodiment.
[Explanation of symbols]
1. . . Mold for forming honeycomb structure,
2. . . Supply holes,
3. . . Lower groove,
4). . . Forming groove,
5. . . Base plate,
51. . . Bottom groove forming surface,
6). . . Top plate,
65. . . Melt,
7). . . Grooving equipment,
71. . . Beam irradiation means,
710. . . Condenser lens,
72. . . Gas supply means,
721. . . Lower nozzle,
722. . . Upper nozzle,
81. . . Lower assist gas,
82. . . Upper assist gas,
9. . . High density energy beam,

Claims (11)

Honeycomb having supply holes for supplying material, lattice-shaped forming grooves for forming the material into a honeycomb shape, and lower grooves arranged between the supply holes along the shape of the forming grooves In a method of manufacturing a mold for forming a structure,
The supply hole is formed from one surface of the base plate, the lower groove having a groove width wider than the forming groove is formed from the other surface, and the lower groove communicates with the supply hole in the thickness direction of the base plate. Let
Next, the upper plate is joined to the lower groove forming surface in which the lower groove is opened in the base plate,
Next, when processing the molding groove by irradiating a high-density energy beam so as to penetrate the lower groove from the surface of the upper plate ,
Manufacturing of a die for forming a honeycomb structure, wherein the assist gas is supplied also from the irradiation side while ensuring the flow of the assist gas supplied from the lower groove side to the irradiation portion to the irradiation side Method. Honeycomb having supply holes for supplying material, lattice-shaped forming grooves for forming the material into a honeycomb shape, and lower grooves arranged between the supply holes along the shape of the forming grooves In a method of manufacturing a mold for forming a structure,
  The supply hole is formed from one surface of the base plate, the lower groove having a groove width wider than the forming groove is formed from the other surface, and the lower groove communicates with the supply hole in the thickness direction of the base plate. Let
  Next, the upper plate is joined to the lower groove forming surface in which the lower groove is opened in the base plate,
  Next, when processing the molding groove by irradiating a high-density energy beam so as to penetrate the lower groove from the surface of the upper plate,
  A shielding plate having an opening around the high-density energy beam irradiated portion is disposed on the surface of the upper plate, and the forming groove is processed while the shielding plate is moved along with the movement of the high-density energy beam. A method for manufacturing a mold for forming a honeycomb structure. Honeycomb having supply holes for supplying material, lattice-shaped forming grooves for forming the material into a honeycomb shape, and lower grooves arranged between the supply holes along the shape of the forming grooves In a method of manufacturing a mold for forming a structure,
  The supply hole is formed from one surface of the base plate, the lower groove having a groove width wider than the forming groove is formed from the other surface, and the lower groove communicates with the supply hole in the thickness direction of the base plate. After the formation of the lower groove, an anti-adhesive agent for preventing adhesion of the melt is applied to the inner wall of the lower groove,
  Next, the upper plate is joined to the lower groove forming surface in which the lower groove is opened in the base plate,
  Next, a method for manufacturing a mold for forming a honeycomb structure, wherein the forming groove is processed by irradiating a high-density energy beam so as to pass through the surface of the upper plate into the lower groove. The honeycomb structure molding die according to any one of claims 1 to 3, wherein a cross-sectional area of the groove of the lower groove is 2.5 times or more of a cross-sectional area of the groove of the forming groove. Production method. 5. The processing of the forming groove according to claim 1, while supplying an assist gas from at least the lower groove side opposite to the irradiation side to the irradiated portion of the high-density energy beam. A method for manufacturing a die for forming a honeycomb structure. 6. The assist gas supply from any one of claims 1 to 5, wherein the assist gas is supplied from the lower groove side using a movable nozzle, and the nozzle is moved while moving the high-density energy beam. A method for manufacturing a die for forming a honeycomb structure, wherein an assist gas is supplied. Honeycomb having supply holes for supplying material, lattice-shaped forming grooves for forming the material into a honeycomb shape, and lower grooves arranged between the supply holes along the shape of the forming grooves An apparatus for processing the molding groove of the structure molding die,
  The supply hole and the lower groove are formed in advance, and the mold material having the upper plate for forming the groove on the surface side of the lower groove is transmitted from the surface of the upper plate to the lower groove. A beam irradiation means for irradiating a high-density energy beam,
  Moving means for moving the beam irradiation means along the lower groove;
  Gas supply means for supplying an assist gas from at least the lower groove side opposite to the irradiation side with respect to the irradiation portion of the high-density energy beam, the gas supply means from the lower groove side with respect to the irradiation portion A groove processing apparatus for a honeycomb structure molding die, wherein the assist gas is supplied from the irradiation side while ensuring the flow of the assist gas to be supplied to the irradiation side. Honeycomb having supply holes for supplying material, lattice-shaped forming grooves for forming the material into a honeycomb shape, and lower grooves arranged between the supply holes along the shape of the forming grooves An apparatus for processing the molding groove of the structure molding die,
  The supply hole and the lower groove are formed in advance, and the mold material having the upper plate for forming the groove on the surface side of the lower groove is transmitted from the surface of the upper plate to the lower groove. A beam irradiation means for irradiating a high-density energy beam,
  Moving means for moving the beam irradiation means along the lower groove;
  Gas supply means for supplying assist gas from at least the lower groove side opposite to the irradiation side with respect to the irradiation portion of the high-density energy beam;
  A shielding plate having an opening around the high-density energy beam irradiated portion is disposed on the surface of the upper plate, and the forming groove is processed while the shielding plate is moved along with the movement of the high-density energy beam. A grooving device for a honeycomb structure molding die, characterized in that it is configured as described above. 9. The groove processing apparatus for a honeycomb structure forming die according to claim 7, wherein the beam diameter and output of the high-density energy beam emitted from the beam irradiation means are changeable. 10. The gas supply means according to claim 7, wherein the gas supply means has a movable nozzle for supplying an assist gas from the lower groove side, and the nozzle is moved to move the high-density energy beam. A grooving device for a honeycomb structure forming mold, which is provided so as to be movable along with the dies. 11. The groove processing apparatus for a honeycomb structure forming mold according to claim 10, wherein the nozzle is provided coaxially with the beam irradiation means.

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