Assembly method and assembly device

Abstract

To provide an assembly method and an assembly device capable of identifying, from among a plurality of overlapping regions, an overlapping region that requires adjustment.SOLUTION: An assembly method comprises fitting a bulkhead 30 into an outer liner 11 at a prescribed position to assemble them together, where the outer liner includes a plurality of through-holes 11a formed in a circumferential direction with an axis Xo as a central axis, and the bulkhead includes a plurality of through-holes 32a formed in a circumferential direction with an axis Xb as a central axis. The assembly method causes a computer to execute: a size detection step of detecting sizes of overlapping regions between respective corresponding ones of the through-holes 11a and through-holes 32a with the bulkhead 30 fitted into the outer liner 11; and an overlapping region identification step for identifying, on the basis of the sizes of all the overlapping regions, overlapping regions in which a positional relationship between the through-hole 11a and the through-hole 32a requires adjustment.SELECTED DRAWING: Figure 7

Description

[Technical Field]

[0001] The present disclosure relates to an assembly method and an assembly apparatus. [Background technology]

[0002] For example, a turbofan engine mounted on an aircraft is provided with a combustor that mixes compressed air and fuel and burns the mixture (Patent Document 1).

[0003] The combustor includes, for example, a combustion chamber defined by a cylindrical outer combustor, a cylindrical inner combustor, and an annular bulkhead. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Special Publication No. 2015-532411 Summary of the Invention [Problem to be solved by the invention]

[0005] In assembling the combustor, for example, a task of fitting a bulkhead into the outer combustor occurs.

[0006] The bulkhead and the outer combustor have a plurality of through holes formed along the circumferential direction, into which fastening bolts are inserted, and in order to fasten the bulkhead to the outer combustor with precision, it is preferable that the positions of the through holes uniformly coincide with each other at all locations. That is, it is preferable to adjust the size of the overlapping region between the through holes of the bulkhead and the through holes of the outer combustor so that the overlapping region is uniform at all locations along the circumferential direction. However, a method for identifying the overlapping region that needs to be adjusted has not been established.

[0007] The present disclosure has been made in consideration of the above circumstances, and aims to provide an assembly method and assembly device that can identify overlapping areas that require adjustment from among multiple overlapping areas. [Means for solving the problem]

[0008] In order to solve the above problems, the assembly method and assembly apparatus of the present disclosure employ the following measures. That is, an assembly method according to one embodiment of the present disclosure is an assembly method in which a first cylindrical body having a plurality of first through holes formed along a circumferential direction with a first axis as a central axis is fitted into a predetermined position with a second cylindrical body having a plurality of second through holes formed along a circumferential direction with a second axis as a central axis, and in which, when the second cylindrical body is fitted into the first cylindrical body, a size detection process is executed to detect the size of the overlapping area between each of the corresponding first through holes and second through holes, and an overlapping area identification process is executed to identify the overlapping area in which adjustment of the positional relationship between the first through holes and the second through holes is required based on the sizes of all of the overlapping areas.

[0009] Furthermore, an assembly device according to one embodiment of the present disclosure is an assembly device for assembling a first cylindrical body having a plurality of first through holes formed along a circumferential direction with a first axis as a central axis by fitting a second cylindrical body having a plurality of second through holes formed along a circumferential direction with a second axis as a central axis into a predetermined position, the assembly device comprising: a holding tool for holding an axial member; and a control unit; wherein the control unit controls the holding tool to insert the axial member into an overlapping area between the first through hole and the second through hole, controls the holding tool to move the axial member in a direction perpendicular to the insertion direction, calculates the amount of play of the axial member in the overlapping area based on the amount of movement of the axial member, and identifies the overlapping area in which adjustment of the positional relationship between the first through hole and the second through hole is required based on the calculated amount of play in all of the overlapping areas. [Effects of the Invention]

[0010] According to the present disclosure, it is possible to identify overlapping regions that require adjustment from among multiple overlapping regions. [Brief explanation of the drawings]

[0011] [Figure 1] FIG. 1 is a perspective view of a combustor according to an embodiment of the present disclosure. [Figure 2] FIG. 2 is a cross-sectional view of the combustor taken along line II-II in FIG. 1. [Figure 3] FIG. 2 is a perspective view of an outer combustor. [Figure 4] FIG. 2 is a perspective view of an inner combustor. [Figure 5] FIG. [Figure 6] FIG. 1 is a flow diagram of an assembly method according to an embodiment of the present disclosure. [Figure 7] FIG. 10 is a perspective view showing the bulkhead being transported to the outer combustor. [Figure 8] FIG. 10 is a perspective view showing the positioning of the bulkhead relative to the outer combustor (outer liner). [Figure 9] FIG. 10 is a perspective view showing the state in which an alignment pin is being inserted. [Figure 10] FIG. 10 is a partially enlarged perspective view showing the state in which the alignment pin is being inserted. [Figure 11] FIG. 10 is a diagram showing the relationship between the overlapping area and the alignment pins. [Figure 12] FIG. 10 is a diagram illustrating the concept of the alignment pin mechanism. [Figure 13] 10A and 10B are diagrams illustrating an example of an alignment pin mechanism. [Figure 14] FIG. 10 is a diagram showing the relationship between the overlapping area and the alignment pins. [Figure 15] FIG. 10 is a perspective view showing a state in which the bulkhead is fitted into the outer combustor (outer liner). [Figure 16] FIG. 10 is a perspective view showing a state in which a hole alignment operation is performed with the bulkhead fitted into the outer combustor (outer liner). [Figure 17]FIG. 10 is a perspective view showing a state in which a bolt is being inserted. [Figure 18] FIG. 10 is a partially enlarged perspective view showing the state in which the bolt is being inserted (outer peripheral surface side). [Figure 19] FIG. 10 is a partially enlarged perspective view showing the state in which the bolt is being inserted (inner peripheral surface side). [Figure 20] FIG. 10 is a diagram showing how the size of an overlapping area is detected. [Figure 21] FIG. 10 is a perspective view showing the assembly being transported to the inner combustor. [Figure 22] FIG. 10 is a perspective view showing the assembly being fitted into the inner combustor (inner liner). DETAILED DESCRIPTION OF THE INVENTION

[0012] Hereinafter, an embodiment of an assembly method and an assembly apparatus according to the present disclosure will be described with reference to the drawings.

[0013] [Basic configuration of the combustor] First, the basic structure of a combustor 1, which is an example of an application of the assembly method and assembly device, will be described.

[0014] The combustor 1 is a device that defines a combustion chamber CC in, for example, a turbofan engine installed in an aircraft, in which compressed air and fuel are mixed and burned to generate high-temperature combustion gas that rotates a turbine.

[0015] As shown in FIGS. 1 and 2, the combustor 1 includes an outer combustor 10, an inner combustor 20, a bulkhead 30, and a hood 40.

[0016] As shown in Figures 2 and 3, the outer combustor 10 is an overall cylindrical component that includes an outer liner 11 and a plurality of outer liner panels 12 (hereinafter simply referred to as "panels 12") provided on the inner circumferential surface of the outer liner 11.

[0017] The outer liner 11 is a cylindrical metal part having an axis Xo as its central axis, and is made of, for example, sheet metal. The inner circumferential surface of the outer liner 11 facing the combustion chamber CC is divided and covered over substantially the entire surface by a plurality of panels 12. The panels 12 thermally protect the outer liner 11 from combustion gases.

[0018] As shown in Figures 2 and 3, each panel 12 is an arc-shaped part that corresponds to the shape of each part of the outer peripheral surface of the outer liner 11, and is formed, for example, by applying heat-resistant treatment (e.g., ceramic coating) to the surface of a cast plate material. The outer peripheral surface of each panel 12 is provided with a plurality of studs 12a that protrude outward. Each panel 12 is fixed to the outer liner 11 by inserting a stud 12a into a hole formed in the outer liner 11 and attaching a washer 12b and a nut 12c to the stud 12a protruding from the hole.

[0019] A plurality of through holes 11a are formed at approximately equal angular intervals along the circumferential direction about the axis Xo on the peripheral surface (edge ​​portion) at one end of the outer liner 11. This edge portion is not covered by the panel 12. As will be described later, an outer wall portion 32 of the bulkhead 30 is fitted (e.g., by an interference fit) into this edge portion.

[0020] As shown in Figures 2 and 4, the inner combustor 20 is an overall cylindrical component that includes an inner liner 21 and a plurality of inner liner panels 22 (hereinafter simply referred to as "panels 22") provided on the inner peripheral surface of the inner liner 21. As shown in FIGS. 1 and 2, the inner combustor 20 is disposed inside the outer combustor 10 in the assembled combustor 1.

[0021] As shown in FIGS. 2 and 4, the inner liner 21 is a cylindrical metal part having an axis Xi as its central axis, and is made of, for example, sheet metal. The outer peripheral surface of the inner liner 21 facing the combustion chamber CC is divided and covered over substantially the entire surface by a plurality of panels 22. The panels 22 thermally protect the inner liner 21 from combustion gases.

[0022] As shown in Figures 2 and 4, each panel 22 is an arc-shaped part that corresponds to the shape of each part of the outer surface of the inner liner 21, and is formed, for example, by applying heat-resistant treatment (e.g., ceramic coating) to the surface of a cast plate material. The inner peripheral surface of each panel 22 is provided with a plurality of studs 22a that protrude inward. Each panel 22 is fixed to the inner liner 21 by inserting a stud 22a into a hole formed in the inner liner 21 and attaching a washer 22b and a nut 22c to the stud 22a protruding from the hole.

[0023] A plurality of through holes 21a are formed at approximately equal angular intervals along the circumferential direction about the axis Xi on the peripheral surface (edge ​​portion) of one end of the inner liner 21. This edge portion is not covered by the panel 22. As will be described later, an inner wall portion 33 of the bulkhead 30 is fitted into this edge portion (e.g., by an interference fit).

[0024] As shown in FIGS. 1 and 2 , the bulkhead 30 is an annular component having an axis Xb as its central axis, and is installed so as to close an annular opening formed between one end of the outer combustor 10 and one end of the inner combustor 20. As shown in Figures 2 and 5, the bulkhead 30 has an annular bottom 31, an outer wall 32 standing upright from the outer peripheral edge of the bottom 31, and an inner wall 33 standing upright from the inner peripheral edge of the bottom 31. As will be described later, the outer wall portion 32 is fitted into the outer liner 11. The inner wall portion 33 is fitted into the inner liner 21.

[0025] The outer wall portion 32 is formed with a plurality of through holes 32a at approximately equal angular intervals along the circumferential direction with the axis Xb as the central axis. The angular interval between the through holes 32a is equal to the angular interval between the through holes 11a, so that when the bulkhead 30 is fitted into the outer liner 11, the positions of the through holes 32a can be aligned with the positions of the through holes 11a in the circumferential direction.

[0026] The inner wall portion 33 is formed with a plurality of through holes 33a at substantially equal angular intervals along the circumferential direction with the axis Xb as the central axis. The angular interval between the through holes 33a is equal to the angular interval between the through holes 21a. Therefore, when the bulkhead 30 is fitted into the inner liner 21, the positions of the through holes 32a can be aligned with the positions of the through holes 21a in the circumferential direction.

[0027] As shown in FIG. 2 , in the assembled combustor 1, the outer wall portion 32 of the bulkhead 30 contacts the inner circumferential surface of the outer combustor 10, and the inner wall portion 33 of the bulkhead 30 contacts the inner circumferential surface of the inner combustor 20. The bulkhead 30 is fixed to the outer combustor 10 and the inner combustor 20 by screwing bolts 51 inserted through the outer wall portion 32 and the outer combustor 10 into nut plates 52 (nut portions) provided on the outer wall portion 32, and by screwing bolts 51 inserted through the inner wall portion 33 and the inner combustor 20 into nut plates 52 provided on the inner wall portion 33. Details will be described later.

[0028] The combustion chamber CC is defined by the outer combustor 10 , the inner combustor 20 , and the bulkhead 30 .

[0029] As shown in FIGS. 1 and 2, the hood 40 is an annular part that is installed so as to cover the bulkhead 30.

[0030] The combustor 1 configured as above functions as follows. That is, air and fuel compressed by a compressor are supplied to a combustion chamber CC and mixed therein. The air and fuel mixture is then combusted in the combustion chamber CC to generate hot combustion gases that rotate the turbine.

[0031] [Assembly method and assembly equipment] Next, the assembly method will be described. The assembly of the combustor 1 using this assembly method is performed by a robot system equipped with a transfer tool 61, a hole alignment tool 62, a pushing tool 63, and a nut runner 64 (holding tool). The transport tool 61, hole alignment tool 62, pushing tool 63 and nut runner 64 that make up the robot system are provided, for example, on robot arms, and their operations are controlled as desired depending on the work.

[0032] The control of the operation of the robot system is executed by a control unit 82 (Controller). The control unit 82 includes, for example, a CPU (Central Processing Unit: processor), a main memory, a secondary storage, etc. Furthermore, the control unit 82 may include a communication unit for transmitting and receiving information to and from other devices. The main storage device is composed of writable memory such as cache memory and RAM (Random Access Memory), and is used as a working area for reading the execution program of the CPU and writing the processing data by the execution program. A secondary storage device is a non-transitory computer-readable storage medium, such as a magnetic disk, a magneto-optical disk, a CD-ROM, a DVD-ROM, or a semiconductor memory. For example, a series of processes for realizing various functions is stored in a secondary storage device in the form of a program, and the CPU reads this program into the main storage device and executes information processing and arithmetic operations to realize various functions. Note that the program may be pre-installed in the secondary storage device, provided in a state stored in a computer-readable storage medium, or distributed via wired or wireless communication means. Examples of computer-readable storage media include magnetic disks, magneto-optical disks, CD-ROMs, DVD-ROMs, and semiconductor memories.

[0033] This assembly method involves fitting the bulkhead 30 (more specifically, the outer wall portion 32 (second cylindrical body)) into the outer combustor 10 (more specifically, the outer liner 11 (first cylindrical body)) and securing them with bolts 51, and then fitting the bulkhead 30 in the assembly into the inner combustor 20 (more specifically, the inner liner 21) and securing them with bolts 51. The assembly method will be described in detail below with reference to the flow chart shown in FIG.

[0034] As shown in FIG. 7, the bulkhead 30 is gripped by the transport tool 61, and the attitude and position of the bulkhead 30 are controlled so that the bulkhead 30 approaches the outer combustor 10 fixed on the fixing jig 81. At this time, the attitude and position of the bulkhead 30 are controlled so that the axis Xb of the bulkhead 30 is inclined with respect to the axis Xo of the outer liner 11 .

[0035] Then, as shown in Figure 8, the attitude and position of the bulkhead 30 is controlled so that the outer peripheral surface of the outer wall portion 32 of the bulkhead 30 contacts the inner peripheral surface of the outer liner 11 while tilted relative to the outer liner 11. At this time, because the bulkhead 30 is inclined relative to the outer liner 11, the outer peripheral surface of the outer wall portion 32 of the bulkhead 30 contacts the inner peripheral surface of the outer liner 11 at one point. The bulkhead 30 is then positioned relative to the outer liner 11 by the contact point (S101 in FIG. 6: contact step).

[0036] When positioning the bulkhead 30, the posture and position of the bulkhead 30 are controlled so that one through hole 11a located at a position corresponding to the contact point and one through hole 32a located at a position corresponding to the contact point are approximately aligned. Here, "substantially coincident" does not mean that the through holes 11a and 32a are perfectly coincident, but rather that there is at least an overlapping region formed by the overlap of the through holes 11a and 32a. The "overlapping region" refers to a region that penetrates in the front-to-rear direction and is formed when one through hole 11a and one corresponding through hole 32a overlap, for example, front-to-rear (shown by cross-hatching in FIG. 11).

[0037] Once the positioning of the bulkhead 30 is complete, the attitude and position of the hole alignment tool 62 are controlled so that the alignment pin 62a (deformable shaft member) is inserted into the overlapping area between the through-hole 11a and the through-hole 32a (S102 in FIG. 6), as shown in Figures 9 to 11. This makes it possible to prevent the bulkhead 30 from shifting relative to the outer liner 11 due to work or operations described below. As shown in FIG. 9, the alignment pin 62a is provided on the hole alignment tool 62.

[0038] As shown in FIG. 12, the alignment pin 62a is a shaft member whose outer diameter can be expanded. 12, the two-dot chain line represents the outer diameter (external shape) of alignment pin 62a before deformation, and the solid line represents the outer diameter (external shape) of alignment pin 62a after deformation. The outer diameter before deformation is smaller than the inner diameters of through hole 11a and through hole 32a. Furthermore, the outer diameter after deformation is preferably approximately the same as the inner diameters of through hole 11a and through hole 32a.

[0039] As shown in FIG. 13, the alignment pin 62a may be, for example, a mechanism in which a fan-shaped member divided into four parts is configured to be movable in the radial direction. However, this mechanism is merely an example, and any mechanism may be employed as long as it is a shaft member that can expand the outer diameter or outer shape.

[0040] The alignment pin 62a functions as follows. That is, as shown in FIG. 14, first, the outer diameter of the alignment pin 62a is enlarged while it is inserted into the through-hole 11a and the through-hole 32a that form the overlapping region. Then, during the expansion process, the outer peripheral surface of the alignment pin 62a comes into contact with the inner peripheral edge of the through hole 11a and the inner peripheral edge of the through hole 32a. Furthermore, as the alignment pin 62a continues to expand even after the contact, the through hole 11a (outer liner 11) and the through hole 32a (bulkhead 30) move in a direction that increases the size of the overlapping area. In other words, the outer liner 11 and / or the bulkhead 30 move in a direction that more closely aligns the through hole 11a and the through hole 32a. Hereinafter, this operation will be referred to as the "hole alignment operation."

[0041] The "size of the overlapping region" is a concept that includes the dimensions of the overlapping region (for example, width and height), the area and size of the overlapping region, etc. The size of the overlapping region is a parameter for determining the degree of alignment (degree of coincidence) between the through holes 11a and 32a that form the overlapping region, and the larger the size of the overlapping region, the higher the degree of alignment.

[0042] After performing the hole alignment operation in one overlapping area near the contact point used for positioning, the bulkhead 30 is fitted inside the outer liner 11 as shown in FIG. 15 (S103 in FIG. 6: fitting process).

[0043] The bulkhead 30 is fitted by controlling the attitude and position of the pushing tool 63. Specifically, the pushing tool 63 is used to push in the portion of the bulkhead 30 that is floating relative to the outer liner 11 (for example, the portion on the opposite side of the contact point), and the bulkhead 30 is slowly fitted into the outer liner 11 using the contact point with the outer liner 11 as a fulcrum.

[0044] At this time, it is preferable to recognize an image of the outer peripheral surface (preferably the entire circumference) of the outer liner 11 from a direction perpendicular to the axis Xo (for example, directly from the side) using a vision sensor or the like. Specifically, the size of each overlapping area corresponding to each location and position is recognized from the image. This allows the degree of alignment (degree of coincidence) between the through holes 11a and 32a to be grasped at each location. When the control unit 82 determines that the through holes 11a and 32a are roughly aligned at all locations, the control unit 82 determines that the fitting of the bulkhead 30 is complete (S104 in FIG. 6). When the fitting operation is completed, the axis Xb of the bulkhead 30 substantially coincides with the axis Xo of the outer liner 11.

[0045] During the fitting operation, the bulkhead 30 is pushed in so that the axis Xb of the inclined bulkhead 30 gradually aligns with the axis Xo of the outer liner 11, thereby gradually increasing the contact area of ​​the outer wall portion 32 of the bulkhead 30 against the inner surface of the outer liner 11. Therefore, the bulkhead 30 can be pushed in with less force and more stably than when the bulkhead 30 is pushed in with the axis Xb of the bulkhead 30 and the axis Xo of the outer liner 11 aligned from the beginning.

[0046] When the fitting operation of the bulkhead 30 is completed, the transfer tool 61, the hole alignment tool 62, and the pushing tool 63 are retracted from the object (S105 in FIG. 6).

[0047] After the retraction of each tool is completed, the hole alignment tool 62 (alignment pins 62a) is controlled to perform hole alignment operations for all overlapping regions, as shown in FIG. 16 (S106 in FIG. 6: initial alignment step).

[0048] After all hole alignment operations are completed, the attitude and position of the nut runner 64 are controlled so that the bolts 51 (shaft members) are inserted into all overlapping regions, as shown in FIGS. As shown in FIG. 17, the bolt 51 is held by a nut runner 64.

[0049] As shown in FIG. 19, a nut plate 52 (nut portion) is provided on the inner peripheral surface of the outer wall portion 32 of the bulkhead 30. Although the nut plate 52 is connected to the outer wall portion 32, it has a range of motion that allows it to move within a predetermined range. Note that the range of motion is within a plane perpendicular to the axial direction of the bolt 51.

[0050] After inserting the bolt 51, the nut runner 64 is controlled (the bolt 51 is rotated) so that the tip of the bolt 51 is threaded into the nut plate 52. This operation is performed at all points. This puts the bolt 51 into a provisionally fastened state (S107 in FIG. 6). As described above, the nut plate 52 has a movable range, so that the bolt 51 can be moved together with the nut plate 52 in the provisionally fastened state.

[0051] After the bolts 51 are temporarily fastened, the size of the overlapping area is detected at all points (S108 in FIG. 6: size detection step). A specific example of this method will be given below.

[0052] <Example 1 of size detection process> As shown in FIG. 20, first, the bolt 51 inserted into the overlapping region in a pre-tightened state is moved by the nut runner 64 in a direction perpendicular to the axial direction (for example, in the vertical and horizontal directions).

[0053] The moved bolt 51 comes into contact with the inner peripheral edge of the through hole 11a and / or the inner peripheral edge of the through hole 32a. When the bolt 51 comes into contact, a load is applied to the nut runner 64 that holds the bolt 51. Therefore, the movement of the bolt 51 is stopped at that position, and the coordinates of that position are acquired by the control unit 82. The control unit 82 then calculates the dimensions of the overlapping region based on the acquired coordinates. In other words, the control unit 82 detects the amount of backlash of the bolt 51 in the overlapping region. This allows the size of the overlapping area to be detected.

[0054] <Example 2 of size detection process> The nut runner 64 rotates the bolt 51 in a temporarily tightened state in a direction for further tightening, and the tightening torque generated at this time is detected, and the value of the tightening torque is acquired by the control unit 82.

[0055] When the overlapping region is large, there is a large spatial margin between the outer peripheral surface of the bolt 51 and the inner peripheral edge of the through hole 11a and the inner peripheral edge of the through hole 32a, and the tightening torque tends not to increase. On the other hand, if the overlapping area is small, there is little spatial margin, and in the process of tightening the bolt 51, the bolt 51 is likely to get caught on the inner peripheral edge of the through hole 11a and / or the inner peripheral edge of the through hole 32a, in which case the tightening torque tends to increase. In this way, the size of the overlap area may be predicted by measuring the tightening torque.

[0056] Next, based on the sizes of all the detected overlapping areas, the control unit 82 identifies overlapping areas where adjustment of the positional relationship between the through-hole 11a and the through-hole 32a is required (S109 in FIG. 6: overlapping area identifying step).

[0057] Specifically, the control unit 82 (1) calculates the average size of the overlapping areas based on the sizes of all the overlapping areas, and (2) determines that any overlapping area that deviates from that average by more than a predetermined value is an "overlapping area that requires adjustment." The predetermined value is set in advance, but can be changed as needed.

[0058] Basically, an overlapping area that is smaller than the average value by a predetermined value or more is determined to be an "overlapping area that requires adjustment," because in the alignment process described below, adjustments are made to widen the overlapping area.

[0059] As another example, an overlapping area that is outside a predetermined range for which a lower limit is set may be determined to be an "overlapping area that requires adjustment." In other words, an overlapping area that is smaller than a predetermined size may be determined to be an "overlapping area that requires adjustment."

[0060] Once the overlapping area that needs to be adjusted is identified, the positional relationship between the through-hole 11a and the through-hole 32a that form the overlapping area is adjusted (S201 in FIG. 6: alignment step).

[0061] Specifically, a method is exemplified in which the bolt 51 in a provisionally fastened state is moved in a direction perpendicular to the axial direction by the nut runner 64 to move the position of the through hole 11a and / or the position of the through hole 32a.

[0062] As another example, the temporarily fastened bolts 51 may be temporarily removed, and the alignment pins 62a may be used to perform hole alignment in the overlapping area. After the hole alignment, the bolts 51 are temporarily fastened again.

[0063] Once the positional relationship adjustment has been completed for all of the overlapping areas, step S109 is executed again, and this is repeated until there are no more overlapping areas that require adjustment. This allows the size of the overlapping area to be uniform at all points.

[0064] When the size of the overlapping area becomes uniform at all points, all the bolts 51 are tightened by the nut runner 64 to perform final tightening (S110 in FIG. 6). As a result, the bulkhead 30 is fastened to the outer combustor 10 at an appropriate position (S111 in FIG. 6).

[0065] Next, as shown in FIGS. 21 and 22 , the assembly of the outer combustor 10 and the bulkhead 30 is grasped by the transportation tool 61, and the attitude and position of the assembly are controlled so that the assembly approaches the inner combustor 20 fixed on the fixing jig 81. At this time, the posture and position of the assembly are controlled so that the axes of the assembly (axes Xo and Xb) are inclined with respect to the axis Xi of the inner liner 21 (S112 in FIG. 6).

[0066] Thereafter, the assembly and the inner combustor 20 are assembled by repeating the same steps as those performed when assembling the outer combustor 10 and the bulkhead 30. At this time, the bulkhead 30 (more specifically, the inner wall portion 33) of the assembly becomes the first cylindrical body, and the inner combustor 20 (more specifically, the inner liner 21) becomes the second cylindrical body. In this way, the combustor 1 is finally assembled.

[0067] This embodiment has the following advantages. When the bulkhead 30 is fitted into the outer liner 11, the computer executes a size detection process to detect the size of the overlapping area between the through hole 11a and the through hole 32a, and an overlapping area identification process to identify the overlapping area where adjustment of the positional relationship between the through hole 11a and the through hole 32a is required based on the sizes of all the overlapping areas, so that the overlapping area that requires adjustment can be easily identified from among multiple overlapping areas.

[0068] Furthermore, the size detection process is performed by inserting the bolt 51 into the overlapping area and detecting the amount of play of the bolt 51 in a direction perpendicular to the insertion direction, so the size of the overlapping area can be measured using a simple method.

[0069] In addition, the size detection process is performed by inserting a bolt 51 into the overlapping area and detecting the torque generated when the bolt 51 is screwed into a nut plate 52 provided on the bulkhead 30, so the size of the overlapping area can be predicted in a simple manner.

[0070] In addition, the computer executes an alignment process to adjust the positional relationship between the through holes 11a and 32a that form the overlapping area that is determined to require adjustment, so that the positional relationship between the through holes 11a and 32a that is not within an appropriate range can be adjusted to an appropriate position. This allows the size of the overlapping area to be uniform at all points.

[0071] In addition, before the size detection process, the computer executes a contact process in which the outer peripheral surface of the bulkhead 30 (the outer peripheral surface of the outer wall portion 32) is brought into contact with the inner peripheral surface of the outer liner 11 while the axis Xb is inclined relative to the axis Xo, and an insertion process in which the contact point between the outer liner 11 and the bulkhead 30 is used as a fulcrum to insert the bulkhead 30 into the outer liner 11 so that the axis Xo and the axis Xb are aligned.Therefore, the outer liner 11 and the bulkhead 30 can be inserted by gradually applying a load while being positioned at the contact point.

[0072] In addition, after the fitting process and before the size detection process, the computer executes an initial alignment process to adjust the positional relationship between the through holes 11a and 32a that form the overlapping area, so that the overlapping area can be enlarged as much as possible in advance.

[0073] Furthermore, the alignment process is performed by moving the bolt 51 inserted into the overlapping region in a direction perpendicular to the insertion direction. Therefore, by bringing the bolt 51 into contact with the inner peripheral edge of the through hole 11a or the inner peripheral edge of the through hole 32a and then further moving the bolt 51 from that state, the through hole 11a (outer liner 11) or the through hole 32a (bulkhead 30) can be moved, and the positional relationship between them can be adjusted.

[0074] In addition, the alignment process is performed using the alignment pin 62a, which expands in diameter while inserted into the overlapping area. By expanding the alignment pin 62a in the overlapping area, the through hole 11a (outer liner 11) or the through hole 32a (bulkhead 30) can be moved, and the positional relationship between them can be adjusted.

[0075] The initial alignment process is performed by the alignment pin 62a, which expands in diameter while inserted into the overlapping area. By expanding the alignment pin 62a in the overlapping area, the through hole 11a (outer liner 11) or the through hole 32a (bulkhead 30) can be moved, and the positional relationship between them can be adjusted.

[0076] The assembling method and assembling apparatus according to the present embodiment described above can be understood, for example, as follows. That is, the assembly method according to the first aspect of the present disclosure is an assembly method in which a first cylindrical body (11) having a plurality of first through holes (11a) formed along a circumferential direction with a first axis (Xo) as a central axis is fitted into a predetermined position with a second cylindrical body (30) having a plurality of second through holes (32a) formed along a circumferential direction with a second axis (Xb) as a central axis, and the computer executes a size detection process to detect the size of the overlapping area between each of the corresponding first through holes and second through holes when the second cylindrical body is fitted into the first cylindrical body, and an overlapping area identification process to identify the overlapping area where adjustment of the positional relationship between the first through holes and the second through holes is required based on the sizes of all the overlapping areas.

[0077] According to the assembly method of this embodiment, when the second cylindrical body is fitted into the first cylindrical body, a computer executes a size detection process to detect the size of the overlapping area between the first through hole and the second through hole, and an overlapping area identification process to identify the overlapping area where adjustment of the positional relationship between the first through hole and the second through hole is required based on the sizes of all the overlapping areas.Therefore, it is possible to easily identify the overlapping area that requires adjustment from among multiple overlapping areas.

[0078] In addition, an assembly method according to a second aspect of the present disclosure is the assembly method according to the first aspect, wherein the size detection process is performed by inserting an axial member (51) into the overlapping area and detecting the amount of play of the axial member in a direction perpendicular to the insertion direction.

[0079] According to the assembly method of this embodiment, the size detection process is performed by inserting an axial member into the overlapping area and detecting the amount of play of the axial member in a direction perpendicular to the insertion direction, so that the size of the overlapping area can be measured in a simple manner.

[0080] In addition, an assembly method according to a third aspect of the present disclosure is the assembly method according to the first or second aspect, wherein the size detection process is performed by inserting a bolt into the overlapping area and detecting the torque generated when the bolt is screwed into a nut portion (52) provided on the second cylindrical body.

[0081] According to the assembly method of this embodiment, the size detection process is performed by inserting a bolt into the overlapping area and detecting the torque generated when the bolt is screwed into the nut portion provided on the second cylindrical body, so that the size of the overlapping area can be predicted in a simple manner.

[0082] In addition, an assembly method according to a fourth aspect of the present disclosure is an assembly method according to any one of the first to third aspects, in which a computer executes an alignment process to adjust the positional relationship between the first through hole and the second through hole that form the overlapping area that is determined to require adjustment in the overlapping area identification process.

[0083] According to the assembly method of this embodiment, a computer executes an alignment process to adjust the positional relationship between the first through hole and the second through hole that form the overlapping area that is determined to require adjustment in the overlapping area identification process, so that the positional relationship between the first through hole and the second through hole that is not within an appropriate range can be adjusted to an appropriate position. This allows the size of the overlapping area to be uniform at all points.

[0084] Furthermore, an assembly method according to a fifth aspect of the present disclosure is an assembly method according to any one of the first to fourth aspects, in which, before the size detection step, a computer executes a contact step of bringing the outer surface of the second cylindrical body into contact with the inner surface of the first cylindrical body while the second axis is inclined relatively to the first axis, and an insertion step of using the contact point between the first cylindrical body and the second cylindrical body as a fulcrum to insert the second cylindrical body into the first cylindrical body so that the first axis and the second axis coincide.

[0085] According to the assembly method of this embodiment, before the size detection process, a computer executes a contact process in which the outer surface of the second cylindrical body is brought into contact with the inner surface of the first cylindrical body while the second axis is inclined relative to the first axis, and an insertion process in which the second cylindrical body is inserted into the first cylindrical body using the contact point between the first cylindrical body and the second cylindrical body as a fulcrum so that the first axis and the second axis coincide.Therefore, the first cylindrical body and the second cylindrical body can be inserted by gradually applying a load while being positioned at the contact point.

[0086] Furthermore, an assembly method according to a sixth aspect of the present disclosure is an assembly method according to any one of the first to fifth aspects, in which a computer executes an initial alignment step after the fitting step and before the size detection step, in which the computer adjusts the positional relationship between the first through hole and the second through hole that form the overlapping area.

[0087] According to the assembly method of this embodiment, after the fitting process and before the size detection process, the computer executes an initial alignment process to adjust the positional relationship between the first through hole and the second through hole that form the overlapping area, so that the overlapping area can be enlarged as much as possible in advance.

[0088] Furthermore, an assembly method according to a seventh aspect of the present disclosure is an assembly method according to any one of the first to sixth aspects, wherein the inner diameter of the first cylindrical body is smaller than the outer diameter of the second cylindrical body.

[0089] According to the assembly method of this embodiment, the inner diameter of the first cylindrical body is smaller than the outer diameter of the second cylindrical body, so that the first cylindrical body and the second cylindrical body are in a tight fit relationship. In this case, by going through the contact process and the fitting process, the second cylindrical body can be fitted into the first cylindrical body while gradually applying force.

[0090] Furthermore, an assembly method according to an eighth aspect of the present disclosure is an assembly method according to any one of the first to seventh aspects, wherein the alignment step is performed by moving the axial member inserted into the overlapping region in a direction perpendicular to the insertion direction.

[0091] According to the assembly method of this embodiment, the alignment process is performed by moving the axial member inserted into the overlapping region in a direction perpendicular to the insertion direction. Therefore, by contacting the axial member with the edge of the first through hole or the edge of the second through hole and then further moving the axial member from that state, the first through hole (first cylindrical body) or the second through hole (second cylindrical body) can be moved and the positional relationship between them can be adjusted.

[0092] Furthermore, an assembly method according to a ninth aspect of the present disclosure is an assembly method according to any one of the first to eighth aspects, in which the alignment process is performed by a deformed shaft member (62a) that expands in diameter when inserted into the overlapping area.

[0093] According to the assembly method of this embodiment, the alignment process is performed using a deformed shaft member that expands in diameter while inserted into the overlapping region, and by expanding the diameter of the deformed shaft member in the overlapping region, the first through hole (first cylindrical body) or the second through hole (second cylindrical body) can be moved to adjust their positional relationship.

[0094] Furthermore, an assembly method according to a tenth aspect of the present disclosure is an assembly method according to any one of the first to ninth aspects, in which the initial alignment process is performed by a deformable shaft member that expands in diameter when inserted into the overlapping area.

[0095] According to the assembly method of this embodiment, the initial alignment process is performed by a deformed shaft member that expands in diameter while inserted into the overlapping region, and by expanding the diameter of the deformed shaft member in the overlapping region, the first through hole (first cylindrical body) or the second through hole (second cylindrical body) can be moved to adjust their positional relationship.

[0096] An assembly method according to an eleventh aspect of the present disclosure is the assembly method according to any one of the first to tenth aspects, wherein the first cylindrical body is an outer liner of a combustor and the second cylindrical body is a bulkhead of the combustor, or the first cylindrical body is a bulkhead of the combustor and the second cylindrical body is an inner liner of the combustor.

[0097] In addition, an assembly device according to a twelfth aspect of the present disclosure is an assembly device for assembling a first cylindrical body having a plurality of first through holes formed along a circumferential direction with a first axis as a central axis by fitting a second cylindrical body having a plurality of second through holes formed along a circumferential direction with a second axis as a central axis into a predetermined position, and includes a holding tool that holds an axial member, and a control unit, wherein the control unit controls the holding tool to insert the axial member into an overlapping area between the first through hole and the second through hole, controls the holding tool to move the axial member in a direction perpendicular to the insertion direction, calculates the amount of play of the axial member in the overlapping area based on the amount of movement of the axial member, and identifies the overlapping area in which adjustment of the positional relationship between the first through hole and the second through hole is required based on the calculated amount of play in all of the overlapping areas.

[0098] In addition, an assembly device according to a thirteenth aspect of the present disclosure is an assembly device for assembling a first cylindrical body having a plurality of first through holes formed along a circumferential direction with a first axis as a central axis by fitting a second cylindrical body having a plurality of second through holes formed along a circumferential direction with a second axis as a central axis into a predetermined position, and is provided with a holding tool for holding a bolt, and a control unit, wherein the control unit inserts the bolt into an overlapping area between the first through hole and the second through hole, and controls the holding tool so that the bolt is screwed into a nut portion provided on the second cylindrical body, and identifies the overlapping area where adjustment of the positional relationship between the first through hole and the second through hole is required based on the torque of the bolt when screwed into the nut portion. [Explanation of symbols]

[0099] 1. Combustor 10 outer combustor 11 Outer Liner 11a Through hole 12 Panel (Outer liner panel) 12a Stud 12b washer 12c nut 20 Inner Combustor 21 Inner liner 21a Through hole 22 Panel (inner liner panel) 22a stud 22b washer 22c nut 30 Bulkhead 31 Bottom 32 Outer wall 32a through hole 33 Inner wall 33a Through hole 40 Food 51 Bolt (shaft member) 52 Nut plate (nut part) 61 Transport Tools 62 Hole Alignment Tool 62a Alignment pin (deformed shaft member) 63 Push Tool 64 Nutrunner (holding tool) 81 Fixture 82 Control Unit CC combustion chamber Xb axis (bulkhead axis) Xi axis (axis of inner liner) Xo axis (axis of outer liner)

Claims

1. An assembly method for assembling a first cylindrical body having a plurality of first through holes formed in a circumferential direction with a first axis as a central axis, by fitting a second cylindrical body having a plurality of second through holes formed in a circumferential direction with a second axis as a central axis into a first cylindrical body at predetermined positions, a size detection step of detecting a size of an overlapping area between each of the first through holes and the second through holes in a state in which the second cylindrical body is fitted into the first cylindrical body; an overlapping area specifying step of specifying the overlapping area in which adjustment of the positional relationship between the first through hole and the second through hole is required based on the sizes of all the overlapping areas; A computer-implemented assembly method.

2. 2. The assembly method according to claim 1, wherein the size detection step is performed by inserting a shaft member into the overlapping region and detecting the amount of play of the shaft member in a direction perpendicular to the insertion direction.

3. The assembly method according to claim 1, wherein the size detection process is performed by inserting a bolt into the overlapping region and detecting the torque generated when the bolt is screwed into a nut portion provided on the second cylindrical body.

4. The assembly method according to claim 1, wherein a computer executes an alignment step of adjusting the positional relationship between the first through hole and the second through hole that form the overlapping area determined to require adjustment in the overlapping area identification step.

5. Before the size detection step, a contacting step of bringing an outer peripheral surface of the second cylindrical body into contact with an inner peripheral surface of the first cylindrical body in a state in which the second axis is inclined relatively to the first axis; a fitting step of fitting the second cylindrical body into the first cylindrical body so that the first axis coincides with the second axis, using a contact point between the first cylindrical body and the second cylindrical body as a fulcrum; The assembly method according to claim 1, wherein the steps are carried out by a computer.

6. After the fitting step and before the size detection step, The assembly method according to claim 5 , wherein an initial alignment step is carried out by a computer to adjust the positional relationship between the first through-hole and the second through-hole that form the overlapping region.

7. 6. The assembly method according to claim 5, wherein the inner diameter of the first cylindrical body is smaller than the outer diameter of the second cylindrical body.

8. 5. The assembly method according to claim 4, wherein the positioning step is performed by moving the shaft member inserted into the overlapping region in a direction perpendicular to the insertion direction.

9. The assembly method according to claim 4 , wherein the positioning step is performed by using a deformable shaft member that expands in diameter when inserted into the overlapping region.

10. The assembly method according to claim 6 , wherein the initial positioning step is performed by using a deformed shaft member that expands in diameter while being inserted into the overlapping region.

11. The first cylindrical body is an outer liner of a combustor and the second cylindrical body is a bulkhead of the combustor, or 2. The method of claim 1, wherein the first cylindrical body is a bulkhead of the combustor and the second cylindrical body is an inner liner of the combustor.

12. An assembly device for assembling a first cylindrical body having a plurality of first through holes formed in a circumferential direction with a first axis as a central axis, by fitting the first cylindrical body and a second cylindrical body having a plurality of second through holes formed in a circumferential direction with a second axis as a central axis into predetermined positions, a holding tool for holding the shaft member; A control unit; Equipped with The control unit controlling the holding tool to insert the shaft member into an overlapping region between the first through hole and the second through hole; Controlling the holding tool to move the shaft member in a direction perpendicular to the insertion direction, calculating an amount of backlash of the shaft member in the overlapping region based on the amount of movement of the shaft member; An assembly device that identifies the overlapping area in which adjustment of the positional relationship between the first through hole and the second through hole is required, based on the calculated amount of backlash in all of the overlapping areas.

13. An assembly device for assembling a first cylindrical body having a plurality of first through holes formed in a circumferential direction with a first axis as a central axis, by fitting the first cylindrical body and a second cylindrical body having a plurality of second through holes formed in a circumferential direction with a second axis as a central axis into predetermined positions, a holding tool for holding the bolt; A control unit; Equipped with The control unit The bolt is inserted into an overlapping region between the first through hole and the second through hole, and the holding tool is controlled so that the bolt is screwed into a nut portion provided on the second cylindrical body, An assembly device that identifies the overlapping region where adjustment of the positional relationship between the first through hole and the second through hole is required based on the torque of the bolt when it is screwed into the nut portion.

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