JP2008200836A5 - - Google Patents

Description

Metal member having hollow hole and processing method thereof

  The present invention relates to a metal member having a hollow hole like a turbine blade of a gas turbine combustor, a moving blade, a stationary blade, and the like, and a processing method thereof, and prevents generation of burrs around the hole of the hollow hole during cutting processing, In addition, the processing steps can be shortened.

  Since an outer cylinder, an inner cylinder or a tail cylinder, or a turbine blade such as a moving blade or a stationary blade constituting a combustor of a gas turbine is exposed to a high temperature atmosphere, heat resistance is required. Therefore, the members constituting them are coated with a heat-resistant layer, and a hollow hole is provided in the inside, and cooling of the compressed air produced by a compressor in the hollow hole or steam supplied from a separately provided steam supply source is performed. It is cooled by flowing the medium. In the method of manufacturing a member having such a hollow hole, a plate-shaped member is formed by brazing two metal plates provided with concave grooves so as to form a hollow hole.

  A conventional method for producing the plate-like member will be described below with reference to FIG. In FIG. 6, first, a metal plate as a material is cut to form two metal plates, and a concave groove to be a hollow hole is formed in the metal plate by electric discharge machining or the like (plate processing step 01). Next, the two metal plates are joined by brazing (brazing step 02). Next, after taping and curing (curing step 03), molding is performed by pressing, mechanical processing such as cutting, welding, etc. is performed to form a predetermined shape (processing molding step 04 and processing step 06). The curing is performed in advance every machining (curing steps 03 and 05).

  In the formed hollow hole, burrs are generated around the hole in the vicinity of the cut part at the time of the cutting process, so that it is removed by sanding or the like (hole maintenance step 07). Next, after the curing (curing step 08), the heat-resistant layer is coated (step 09). Then, after performing normal heat treatment for removing strain, removing stress, etc. (heat treatment step 010), finally, such as removing dust, machine waste, etc. contained in the hollow hole, and taking care (care step 011) The processing process is finished.

  As described above, in the conventional manufacturing method, when cutting is performed across the hollow hole, burrs are generated around the hole of the hollow hole, and it takes time to remove the burr. In addition, chips generated during the cutting process enter the hollow hole, and removal of chips and the like has required a lot of labor and time. In addition, each time machining or heat-resistant layer coating requires pre-curing such as taping, which takes a long time.

  Patent Document 1 (Japanese Patent Laid-Open No. 2000-49454) discloses a method of cutting a circuit board in the case where a circuit board is produced from a molded plate that is resin-molded by providing a through hole. In this method, when the circuit board is cut by a line crossing the through-hole, the through-hole is cut in a state in which the protective material is filled in advance. Thus, when the plated layer coated on the inner periphery of the through hole is cut, the cut end of the plated layer is pulled to prevent the occurrence of cut burrs.

Patent Document 2 (Japanese Patent Application Laid-Open No. 2003-306760) discloses a coating method for high-temperature members such as a moving blade, a stationary blade, a jet engine blade, or a combustor of a gas turbine. This method is a method in which, when a heat-resistant layer is coated on the surface of a substrate having cooling holes opened, the coating is performed with a massing pin inserted in the cooling holes. Thus, the coating can be performed without closing the opening of the cooling hole.

  Patent Document 3 (Japanese Patent Laid-Open No. 2003-343205) discloses a method of coating a high-temperature member having a cooling hole on its surface with a heat-resistant layer. The high temperature member is the same as the high temperature member to which the invention of Patent Document 2 is applied. In this method, the cooling hole is filled with a filling before the coating, so that the coating can be performed without closing the opening of the cooling hole.

JP 2000-49454 A JP 2003-306760 A JP 2003-343205 A

  Patent Document 1 relates to a method of cutting a resin-molded circuit board, and the circuit board itself is formed of a resin. Therefore, when the ashing process is performed by heating in order to remove the protective material filled in the cooling holes after the cutting process, the circuit board itself is melted, so that the ashing process cannot be performed.

  Therefore, the protective substance filled in the cooling holes can be mechanically removed using a pressing material, or if the protective substance is paraffin or wax, the tank is filled with hot water or a heated cleaning agent solution. It is soaked and removed by immersion. Thus, troublesome work was required for removing the protective substance from the cooling hole.

  Next, Patent Document 2 is to insert a massing pin into the cooling hole before coating the heat-resistant layer, but it is not intended for deburring at the time of cutting a metal member having a hollow hole. In addition, since the enormous number of cooling holes are provided in the components, rotor blades, and stationary blades that make up the combustor of the gas turbine, the operation of inserting the massing pins into each cooling hole one by one is laborious It takes a lot of time.

  Also, it takes a lot of man-hours to produce a massing pin of a size that fits the cooling hole. The massing pin is made of graphite, carbon reinforced fiber plastic, polyethylene-coated metal core material, fluorine-coated metal core material, etc., and after the coating treatment, carbon fibers and metal material remain in the cooling holes. It also takes time to remove these residues from the cooling holes.

  Patent Document 3 is a method of inserting a filling into a cooling hole before coating of a heat-resistant layer. Like Patent Document 2, production of the filling, insertion of the filling into the cooling hole, and from the cooling hole after coating are performed. It takes a lot of work time for removal.

  Therefore, the present invention has been made in view of such a background, and prevents burrs from being generated around the hole in the vicinity of the cut portion of the hollow hole when a metal member having a hollow hole is cut. An object of the present invention is to shorten and simplify the manufacturing process of the metal member by eliminating troublesome deburring work and eliminating the need for curing such as taping. It is another object of the present invention to realize a processing method that prevents dust and machine waste from entering the hollow hole and eliminates the need for the removal operation.

In order to solve the above problems, the processing method of the present invention comprises:
In the method of cutting a metal member having a hollow hole,
A first step of simulating a solid state in the hollow hole by pre-filling the hollow hole with a cured resin in a fluid state before cutting and then curing;
A second step of cutting the metal member thereafter;
A third step of ashing the cured resin filled in the hollow holes of the cut metal member to remove the ash of the cured resin from the hollow holes;
It consists of

  In the method of the present invention, the cooling hole of the metal member having a hollow hole is filled with a cured resin in a fluid state instead of a solid massing pin or filling as in Patent Document 2 or 3. By using this fluidized cured resin with a liquid injector or the like, the cooling holes can be easily filled, and filling work does not take time. Moreover, the operation process which manufactures a massing pin and a filling beforehand like patent document 2 or 3 is not required. Further, the ashing treatment is performed after the metal member is cut, so that the cured resin is ashed, which can be easily taken out.

  In the method of the present invention, the solid state is simulated in the hollow hole by filling the hollow hole of the metal member in advance with a cured resin and then curing. Since the metal member is cut in a state simulating the solid state in this way, it is possible to prevent or reduce the occurrence of burrs around the hole near the cutting portion of the cooling hole. In addition, since the cured resin is filled in the hollow holes in advance, the cured resin can cure the hollow holes, and the ashing treatment is performed at the final stage of the manufacturing process to remove the cured resin residue. In the processing step, dust and machine waste do not enter the hollow hole.

  Moreover, since the filling of the cured resin into the hollow holes plays a role of curing, it is not necessary to perform curing by taping in advance at every machining or coating as in the conventional method described above. Therefore, the machining process can be greatly simplified as compared with the conventional method.

  As a cured resin that can be used in the present invention, for example, a urethane resin or an acrylic resin can be used. Preferably, if a cured resin having a strength close to that of the metal member to be processed is used and the cured resin is filled in the hollow hole and then cured, a state close to the solid state of the metal member can be formed in the hollow hole. Since cutting is performed in this state, burrs in the hollow holes can be almost eliminated. As the curable resin, for example, an ultraviolet curable acrylic resin, a room temperature curable polyester resin, a room temperature curable methyl methacrylate resin, or the like can be used.

  In the method of the present invention, the hollow hole is filled with a cured resin in a fluid state and then cured. However, as a means for curing, for example, natural curing may be used. Alternatively, an ultraviolet curable resin may be used and cured by irradiating the resin with ultraviolet rays.

  When a metal member having a hollow hole is used in a high-temperature atmosphere, heat resistance can be imparted by coating the surface of the metal member with a heat-resistant layer after cutting. In this case, the opening of the hollow hole may be blocked by the heat-resistant layer coating, but the cured resin filled in the hollow hole is raised from the opening of the hollow hole, or the material having poor wettability with the heat-resistant layer coating. If this cured resin is used, the opening of the hollow hole can be prevented from being blocked.

  In the method of the present invention, when the heat treatment of the metal member is required, the heat treatment and the ashing treatment of the cured resin can be performed at the same time, and the processing process can be simplified.

The metal member having a hollow hole of the present invention is a metal member manufactured by the method of the present invention. By producing the metal member of the present invention by the method of the present invention, a metal member having no burrs around the hole in the vicinity of the cut portion of the hollow hole and no dust or machine waste entering the hollow hole is obtained. Can do. Therefore, no deburring work or dust removal work is required. Further, since the metal member of the present invention is manufactured by the method of the present invention, the curing process before machining or coating is not required , so that the machining process can be greatly shortened compared to the conventional method, and hence the cost is reduced.

  The metal member of the present invention can be applied to, for example, a combustor cylinder or tail cylinder of a gas turbine combustor, or a moving blade or stationary blade of a turbine, in which case the cooling air or cooling steam flows through a hollow hole. It becomes a hole.

According to the method of the present invention, in the method of cutting a metal member having a hollow hole , the hollow hole is solidified by pre-filling the hollow hole with a cured resin in a fluid state and then curing. A first step of simulating the state, a second step of cutting the metal member thereafter, and an ashing treatment of the cured resin filled in the hollow holes of the cut metal member, Therefore, it is possible to prevent or reduce the generation of burrs around the hole in the vicinity of the cutting process of the hollow hole, and to realize the metal member in which no foreign substance enters the hollow hole. In addition, since no curing is required during machining, the machining process can be greatly shortened compared to the prior art.

  In addition, since the metal member of the present invention is manufactured by the method of the present invention, the above-described effects can be obtained, and the machining process can be greatly shortened compared to the conventional method, so that an inexpensive metal member with a hollow hole can be realized. .

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified.
(Embodiment 1)

1st Embodiment of this invention is described based on FIGS. In this embodiment, the present invention is applied to a combustor of a gas turbine.
<Combustor>
FIG. 1 is a cross-sectional view schematically showing the vicinity of the combustor 11 of the gas turbine 10. As shown in FIG. 1, a casing 10 a that is an outer frame of the combustor 11 is provided around the combustor 11 of the gas turbine 10. The combustor 11 includes an inner cylinder 11a that generates combustion gas by burning compressed air and fuel therein, an outer cylinder 11b that is provided outside the inner cylinder 11a and is fixed to the vehicle interior 10a, and an inner cylinder. A pilot nozzle 11c provided at an axial position of 11a, a plurality of main nozzles 11d arranged on the outer periphery of the pilot nozzle 11c, and a tail cylinder 1 connected to the inner cylinder 11a and sending combustion gas to a turbine 13 described later. . The gas turbine 10 includes a compressor 12 that supplies compressed air into the passenger compartment 10a, and a turbine 13 that generates power when the combustion gas generated in the combustor 11 is supplied.

The compressed air generated by the compressor 12 is discharged into the vehicle interior 10a as indicated by the arrow P1, and then supplied into the inner cylinder 11a from the gap between the outer cylinder 11b and the inner cylinder 11a as indicated by the arrow P2. Is done. Inside the inner cylinder 11a, diffusion combustion and premixed combustion are performed by the pilot nozzle 11c and the main nozzle 11d to which fuel is supplied, thereby generating high-temperature and high-pressure combustion gas. The generated combustion gas is discharged to the turbines 13 passes through the inside of the transition piece 1, the rotor blade 13a provided in the turbine 13 is powered from the gas turbine 10 by rotated by the combustion gas the discharge Is obtained.

<Cooling structure of tail cylinder>
As described above, since the high temperature and high pressure combustion gas passes through the inside of the transition piece 1, it is made of a nickel-based alloy having good heat resistance and corrosion resistance, and further has a cooling structure on the wall portion. Hereinafter, the cooling structure provided in the wall portion of the transition piece will be described with reference to FIG. 2 in addition to FIG. FIG. 2 is a perspective view schematically showing the wall portion of the tail tube, and a part thereof is cut out to show the internal configuration of the wall portion.

  As shown by an arrow C in FIG. 1, the transition piece 1 is provided with a cooling structure that sucks compressed air from the outer wall to cool the wall portion and discharge the compressed air to the inside of the transition piece 1. As shown in FIG. 2, this cooling structure is provided inside the wall portion and connects the cooling holes 2a, 2b to the plurality of cooling holes 2a, 2b provided in the inner wall 1a and the outer wall 1b of the tail tube. It consists of a cooling groove 3. The compressed air enters the inside of the wall portion from the cooling hole 2b provided in the outer wall 1b, passes through the cooling groove 3, and is discharged from the cooling hole 2a provided in the inner wall 1a of the tail tube to the inside of the tail tube. Then, the compressed air passes through the cooling groove 3 inside the wall portion of the transition piece 1 in this way, so that the wall portion of the transition piece 1 is cooled and overheating is prevented.

<Process of tail cylinder>
FIG. 3 shows the processing steps of this embodiment for manufacturing the wall portion of the transition piece 1 shown in FIG. In FIG. 3, first, a metal plate as a material is cut to form two metal plates constituting the inner wall 1a and the outer wall 1b of the tail cylinder 1. Next, cooling holes 2a and 2b are formed on the metal plate by electric discharge machining or the like, and cooling grooves 3 are formed on the metal plate constituting the outer wall 1b (plate processing step 21). Next, the two metal plates are brazed and joined with the cooling groove 3 inside (brazing step 22).

  The subsequent processing steps will be described with reference to FIG. 4 (a) to 4 (e) are schematic cross-sectional views of the tail tube 1, except for FIG. 4 (c), in a direction substantially parallel to the cooling groove 3 provided on the wall of the tail tube. FIG. 4C is a cross-sectional view taken along line AA in FIG. 4B. FIG. 4A shows the transition piece 1 after brazing and before resin filling. Next, the cooling groove 3 formed in the brazed interior is filled with a cured resin (resin filling step 23).

  FIG. 4B shows a state in which the cured resin 4 in a fluid state is injected into the cooling groove 3 provided on the inner wall 1a with an injector. In this case, the cured resin 4 is filled until the cooling groove 3 and the cooling holes 2a and 2b are completely blocked and the cured resin 4 rises from the openings of the cooling holes 2a and 2b. This prevents the openings of the cooling holes 2a and 2b from being blocked by the heat-resistant layer during the heat-resistant layer coating in the subsequent step, and the fine particles used for blasting described later and the material of the heat-resistant layer used for the thermal barrier coating are the cooling holes 2a, 2b is prevented from entering.

Further, the cured resin 4 injected at this time can withstand about 200 ° C., which is the temperature of the tail tube 1 when a thermal barrier coating described later is applied to the tail tube 1, and burns at a temperature of 200 ° C. or more. Or anything that can be decomposed. For example, an acrylic resin or a silicone resin may be used. A cured resin having a strength close to the strength of the metal material constituting the inner wall 1a and the outer wall 1b when cured. As the curable resin, for example, an ultraviolet curable acrylic resin, a room temperature curable polyester resin, a room temperature curable methyl methacrylate resin, or the like can be used.

When the cooling groove 3 is blocked by the cured resin 4 as shown in FIG. 4 (b), the inner wall 1a and the outer wall 1b are then formed into a predetermined shape by performing mechanical processing such as forming, cutting and welding with a press. (Processing molding step 24 and processing step 25). FIG. 4C shows a state cut along the line AA in FIG. Thereafter, a heat-resistant layer is coated on the inner wall 1a (step 26). In step 26, blast processing is first performed as preprocessing. The blasting process is a process in which fine particles such as alumina collide at high speed to roughen the surface. When this is performed on the inner wall 1a of the tail cylinder 1, the surface of the inner wall 1a becomes as shown in FIG. It becomes rough. In addition, in (d)-(f) of FIG. 4, k shows the cut surface by cutting.

  And the thermal barrier coating is given to the inner wall 1a which roughened the surface by thermal spraying, and a heat-resistant layer is formed. Here, the heat-resistant layer is formed in order to improve the adhesion between the top coat 6 formed for heat insulation and the top coat 6 and the inner wall 1a of the tail tube 1 which is the base, or to prevent the base from being oxidized. Two types of coatings with the bond coat 5 are formed.

First, as shown in FIG. 4E, the bond coat 5 is formed on the inner wall 1a. When the tail tube 1 is made of a nickel-based alloy, an alloy such as MCrAlY (M is any of Fe, Ni and Co, or an alloy thereof) can be used as the bond coat 5. This bond coat 5 is formed with a thickness of several tens of μm to several thousand μm, and since the base is a rough surface, it is easy to adhere due to the anchor effect. Further, the cured resin 4 and the bond coat 5 blocking the cooling hole 2 a often have poor wettability, and in such a case, the bond coat 5 may not be formed on the cured resin 4.

Then, a top coat 6 is formed on the inner wall 1a on which the bond coat 5 is formed, as shown in FIG. As the top coat 6, for example, a ceramic material mainly composed of zirconia can be used. The top coat 6 is also formed with a thickness of several tens μm to several thousand μm, but in some cases, a plurality of layers are formed. The top coat 6 also often has poor wettability with the cured resin 4 blocking the cooling hole 2a. In such a case, the top coat 6 is not formed on the cured resin 4.

  In this embodiment, the cured resin 4 is raised from the opening of the cooling hole 2a, and the top coat 6 is applied to the cured resin 4 filled in the opening of the cooling hole 2a due to poor wettability between the cured resin 4 and the top coat 6. Is not allowed to form. This prevents the top coat 6 from blocking the opening of the cooling hole 2a.

  As described above, the thermal barrier coating is applied to the inner wall 1a of the tail tube 1 by thermal spraying, but after the thermal barrier coating is applied to the tail tube 1, it is inserted into the cooling groove 3 and the cooling holes 2a and 2b. In order to remove the cured resin 4, it is necessary to apply an ashing process, which is one of heat treatments, to the tail cylinder 1. Since the transition piece 1 is a product that requires heat treatment, the heat treatment and the ashing treatment of the cured resin 4 are simultaneously performed at the same time (heat treatment (ashing treatment) step 27).

  The heat treatment and ashing method in the first embodiment will be described below with reference to FIG. FIGS. 5A and 5B are schematic cross-sectional views of the transition piece, and correspond to FIG. 4 showing the transition piece to which the thermal barrier coating is applied.

  In the heat treatment method in the present embodiment, the silicone resin 7 as shown in FIG. 5A is applied to the outer wall 1b of the tail cylinder 1 in which the inner wall 1a as shown in FIG. Apply. Silicone resin 7 is a resin in which a side chain such as a methyl group is bonded to each Si of a main chain formed by alternately bonding a plurality of Si and O in a continuous manner. Although there are various shapes, here, the pasty silicone resin 7 is applied directly to the outer wall 1b of the tail tube 1.

As shown in FIG. 5 (a), after applying the silicone resin 7 to the outer wall 1b of the tail tube 1, the tail tube 1 is used to burn or decompose the cured resin 4 that closes the cooling grooves 3 and the cooling holes 2a and 2b. Heat in an atmospheric furnace. At this time, in order to completely burn or decompose the cured resin 4, a temperature of about 400 ° C. (if this temperature is a temperature at which the cured resin 4 closing the cooling hole 2 a of the tail cylinder 1 can be burned or decomposed). Heat at several temperatures) for several hours. Then, the cured resin 4 that closes the cooling groove 3 and the cooling holes 2a and 2b is not burned or decomposed, but the silicone resin 7 applied to the outer wall 1b of the tail tube 1 is partially decomposed or evaporated by heating. However, some silicone resin 7 remains on the outer wall 1b although it is released into the atmosphere in the furnace. This state is shown in FIG. In addition, when the heating test about the paste-like silicone resin 7 was conducted, when the silicone resin 7 was heated at 400 ° C. or higher, it was confirmed that about 40% was released into the atmosphere and about 60% remained.

Then, the remaining silicone resin 7 protects the outer wall 1b of the tail cylinder 1, so that the outer wall 1b is oxidized and color unevenness due to the oxidation is reduced. Therefore, even if the cured resin 4 inserted into the cooling groove 3 and the cooling holes 2a and 2b is removed by ashing the tail tube 1, color unevenness hardly occurs on the outer wall 1b of the tail tube 1, and the outer wall 1b. The time to polish up is unnecessary or a little. Therefore, by applying the heat treatment method according to the present embodiment to the ashing process in the tail cylinder 1, the time required for adjusting the appearance required after the ashing process can be greatly shortened.

  Moreover, even if the silicone resin 7 is applied unevenly or in a large amount, the remaining silicone resin 7 can be easily removed. Therefore, the work time after the ashing treatment can be shortened as compared with the case where the color unevenness is polished and removed with a grinder as in the prior art. Moreover, if the silicone resin 7 to apply | coat is made into a uniform and appropriate quantity, the external appearance of the tail cylinder 1 after an ashing process can be kept favorable, without removing the residual silicone resin 7. FIG.

  Although the paste-like silicone resin 7 is directly applied to the tail tube 1, a liquid silicone resin 7 having a low viscosity may be applied. Further, the coating method is not limited to the direct coating method, and the sprayed silicone resin 7 may be sprayed onto the outer wall 1b of the tail tube 1 for coating. By these methods, it becomes possible to apply the silicone resin 7 easily and quickly, and the working process can be simplified and the working time can be shortened.

  Moreover, it can apply | coat to the outer wall 1b of the tail cylinder 1 uniformly by apply | coating the silicone resin 7 using a spray. Furthermore, it can apply | coat easily by apply | coating using a spray also to the fine clearance gap etc. which are difficult to apply directly.

  After performing the ashing treatment also serving as a heat treatment in this way, finally, care is taken to remove the ashing residue remaining in the cooling groove 3 (step 28). Since the ashed product can be easily removed outside the cooling groove 3, care is not required.

  According to this embodiment, the inner wall 1a and the outer wall 1a and the outer wall 1a and the outer wall 1a and the outer wall 1b by using the cured resin 4 having a strength close to that of the metal material constituting the inner wall 1a and the outer wall 1b. Since the solid state by the metal material constituting 1b is simulated, the generation of burrs around the hole facing the cut surface k of the cooling groove 3 can be prevented or reduced even if the cutting process is performed in this state. it can. Therefore, deburring work such as filing is unnecessary.

Further, since the cutting process is performed in a state where the cooling groove 3 is filled with the cured resin 4, dust and machine waste do not enter the cooling groove 3 during the cutting process. Since the cured resin 4 is ashed by ashing that also serves as heat treatment in the final stage of the processing process, there is no room for foreign matter such as dust to enter the cooling groove 3. Therefore, the taking-out operation becomes unnecessary.
Furthermore, by performing the machining with the cured resin 4 filled in the cooling groove 3, curing by taping performed in advance for each machining becomes unnecessary.

  Thus, according to the manufacturing method of the transition piece partition according to the present embodiment, the processing steps can be greatly simplified as compared with the conventional method, and the time required for manufacturing can be greatly shortened. Further, since the heat-resistant layer is coated while the cured resin 4 is filled in the cooling groove 3, the cured groove 4 can be cured by the cured resin 4.

  According to the present invention, it is possible to simplify the cutting process of a metal member having a hollow hole, and to prevent the occurrence of burrs in the hollow hole and the entry of foreign matter into the hollow hole. For example, a combustor or a turbine of a gas turbine It is useful when applied to wings.

It is sectional drawing which showed typically the vicinity of the combustor of a gas turbine. It is the partially cutaway perspective view which showed typically the wall part of the tail cylinder of the said combustor. It is a flowchart which shows the process step which concerns on 1st Embodiment of this invention. It is typical sectional drawing of the partition which comprises the tail cylinder of the said 1st Embodiment, (a)-(e) shows the procedure of hardening resin filling, a cutting process, and a heat-resistant layer coating. It is typical sectional drawing of the partition which comprises the tail cylinder of the said 1st Embodiment, (a) And (b) shows the procedure of the heat processing which served as the ashing process. It is a flowchart which shows the processing procedure of the metal member which has the conventional hollow hole.

1 Tail tube (metal member)
1a inner wall 1b outer wall 2a, 2b cooling hole 3 cooling groove (hollow hole)
4 Cured resin 6 Top coat (thermal barrier coating)
DESCRIPTION OF SYMBOLS 10 Gas turbine 11 Combustor 13 Turbine part 13a Rotor blade 23 Resin filling step 24 Processing molding step 26 Heat-resistant layer coating step 27 Heat treatment (ashing treatment) step C, P1, P2 Compressed air (cooling air)
k Cut surface

Claims (6)

In the method of cutting a metal member having a hollow hole,
A first step of simulating a solid state in the hollow hole by pre-filling the hollow hole with a cured resin in a fluid state before cutting and then curing;
A second step of cutting the metal member thereafter;
A third step of ashing the cured resin filled in the hollow holes of the cut metal member to remove the ash of the cured resin from the hollow holes;
A method for processing a metal member having a hollow hole, comprising:   The method for processing a metal member having a hollow hole according to claim 1, wherein a cured resin having a strength close to that of the metal member is used as the cured resin.   3. The hollow hole according to claim 1, wherein the metal member is a member used in a high-temperature atmosphere, and a heat-resistant layer is coated on a surface of the metal member after the second step. A method for processing a metal member.   The method for processing a metal member having a hollow hole according to claim 1 or 2, wherein the heat treatment of the metal member and the ashing treatment of the cured resin are simultaneously performed in the third step. A metal member having a hollow hole, which is processed by the processing method according to any one of claims 1 to 4 .   6. The hollow hole according to claim 5, wherein the metal member constitutes a combustor or a turbine blade of a gas turbine, and the hollow hole is a cooling hole through which cooling air or cooling steam flows. Metal member having.