JP6908401B2 - Blisk manufacturing method, blade parts, and blade jig unit - Google Patents

Description

The present invention relates to a method for manufacturing a blisk using LFW (Linear Friction Welding), a blade component to be joined to a disk component by LFW during manufacturing of blisk, and a blade jig for holding the blade component during LFW. Regarding the unit.

Blisks are sometimes used in turbomachinery components such as aircraft compressors. A blisk is a component that integrates a plurality of blades into an optical disc, and is also called an IBR (Integrally Bladed Rotor). LFW may be used for integration (see, for example, Patent Document 1). LFW is a joining technique in which members are rubbed against each other by linear movement and the members are integrated by plastic flow accompanying frictional heat.

Patent Document 1 discloses a jig unit that holds and vibrates a wing-side component. The wing side component integrally has a wing body portion that forms the outer shape of the blade in the completed state of the blisk, and a holding portion that surrounds the wing body portion. The holding portion is chucked by the sub-block of the jig unit, and the joint surface of the wing-side component exposed from the jig is pressed against the joint surface of the disk-side component. Under this pressure condition, the sub-block vibrates and the joint surfaces are rubbed against each other, and the two parts are joined. After joining, the holding portion is cut off so that the blade has a regular shape.

Japanese Unexamined Patent Publication No. 2015-666579

In Patent Document 1, the holding portion is formed in a rectangular shape that surrounds the blade main body portion when viewed from the blade width direction of the blade side component. The chord length is longer than the maximum wing thickness. The long side of the rectangular holding portion extends substantially in the chord direction, and the short side extends roughly in the blade thickness direction.

The vibration direction at the time of LFW is the chord direction of the wing side component. The load associated with pressurization and vibration must be handled by the portion of the subblock that supports the short side of the holding portion. Since the load per unit area acting on the jig unit is large, the durability of the jig is not good.

In order to reduce the load per unit area, the thickness of the holding portion (dimension in the blade width direction) or the length of the short side of the holding portion (dimension in the blade thickness direction) may be increased. However, as the size of the holding portion increases, it becomes necessary to reduce the thickness of the jig by that amount, and the rigidity of the jig decreases. The decrease in rigidity causes a decrease in the positional accuracy of the wing side parts during LFW, and eventually a decrease in joint quality. Further, if the holding portion becomes large, the cutting process after joining becomes complicated, and the productivity of the blisk decreases.

An object of the present invention is to improve the durability of a jig, improve the joining quality, or improve the productivity of a blisk when manufacturing a blisk using LFW.

The method for manufacturing a brisk according to an embodiment of the present invention is a step of preparing a blade component, and the blade component is held by a blade-side joint surface formed at its base end and a blade chuck jig. A blade component preparation step having a holding portion, an LFW step of joining the blade-side joint surface of the blade component held by the blade chuck jig to a disk component by linear friction matching, and a cutting process of the holding portion. In the blade component preparation step, the blade-side joint surface forms a pair of ridge lines extending in the chord direction when viewed from the normal direction of the blade-side joint surface, and the holding portion is provided. Has a dorsal surface and a ventral surface extending in the chord direction outside the pair of ridges, and at least one of the dorsal surface and the ventral surface is curved along the corresponding ridge. In the LFW step, the blade chuck jig and the blade parts held by the blade chuck jig are vibrated in the direction in which the blade thickness direction is the main component of the blade thickness direction and the chord direction.

According to the above configuration, the vibration direction of the blade component in the LFW is the direction in which the blade thickness direction is the main component of the blade thickness direction and the chord direction. Therefore, most of the load generated in the LFW is carried on the dorsal surface and the ventral surface in the blade component, and is carried in the portion in contact with the dorsal surface and the ventral surface in the blade chuck jig. The dorsal and ventral surfaces extend in the chordal direction and therefore have a large area. Compared with the case where the vibration direction is the chord direction (or the direction in which this is the main component), the load per unit area handled by the blade chuck jig can be reduced, and the durability of the blade chuck jig is improved.

Then, at least one of the dorsal surface and the ventral surface is curved along the corresponding one of the pair of ridges formed by the blade-side joint surface. Therefore, the holding portion can be miniaturized as compared with the case where the holding portion is formed in a rectangular shape. As described above, the vibration direction is the direction in which the blade thickness direction is the main component, and the load per unit area is reduced, so that the holding portion can be curved and miniaturized.

When the holding portion is miniaturized, the jig can be made thicker and the rigidity of the jig is improved. By improving the rigidity, the position accuracy of the blade component with respect to the disk component during LFW and at the end of LFW is improved, and the joining quality is improved. If the holding portion is miniaturized, it is possible to manufacture a blisk in which the pitch between blades is narrow. Further, since the volume of the holding portion cut in the finishing process is reduced, the workload in the finishing process is reduced.

Both the dorsal surface and the ventral surface may be curved along the corresponding ridges.

According to the above configuration, both the dorsal and ventral surfaces of the retainer are curved. Here, even if the adjacent blades are already joined, it is necessary to limit the thickness of the jig to form a space for the adjacent blades to escape in order to avoid interfering with the blades. If both are curved, the holding portion of the adjacent blade is also naturally curved, so that the thickness of the jig can be increased along the curvature. Therefore, the rigidity of the jig can be further increased, which contributes to further improvement of the joining quality.

In the blade component preparation step, the blade component further has a flange protruding from the holding portion, and in the LFW step, the flange is abutted against the outer surface of the blade chuck jig, and in the finishing step, the flange is abutted. The flange may be machined.

According to the above configuration, the load generated in the LFW is handled by the flange, and the load carried by the blade chuck jig can be reduced by that amount. Therefore, the durability of the blade chuck jig is improved. The execution of the LFW process may cause deformation in the peripheral portion of the flange of the blade component, but since the flange is cut in the finishing process, even if such deformation occurs, the quality of the blisk is not adversely affected.

The blade component according to one embodiment of the present invention is a blade component that is joined to a disk component by linear friction stir welding, and is formed at a base end and is bonded to the disk component on a blade side joint surface at the time of linear friction stir welding. A holding portion held by the blade jig unit is provided, and the blade side joint surface forms a pair of ridge lines extending in the chord direction when viewed from the normal direction of the blade side joint surface, and the holding portion is provided. Has a dorsal surface and a ventral surface extending in the chord direction outside the pair of ridges, and at least one of the dorsal surface and the ventral surface is curved along the corresponding ridge. ..

The blade jig unit according to one embodiment of the present invention is a blade jig unit used when joining a blade component to a disk component by linear friction bonding, and the blade component is formed at a base end thereof and said the disk. It has a blade-side joint surface to be joined to the side component and a holding portion, and the blade-side joint surface forms a pair of ridges extending in the chord direction when viewed from the normal direction of the blade-side joint surface. The holding portion has a dorsal surface and a ventral surface extending in the chord direction outside the pair of ridges, and at least one of the dorsal surface and the ventral surface is along the corresponding ridge. The blade jig unit is curved, and includes a blade chuck jig that holds the blade component, a blade chuck jig, and a vibration applying portion that vibrates the blade component held by the blade chuck jig. The blade chuck jig has a holding wall that forms a storage space for accommodating the blade parts, and the holding wall faces the storage space and abuts on the dorsal surface and the ventral surface. At least one of the pair of inner surfaces is curved so as to be aligned with the corresponding surface, and the vibration applying portion is in the direction in which the blade thickness direction is the main component of the blade thickness direction and the chord direction. The blade component is vibrated.

According to the present invention, when manufacturing a blisk using LFW, the durability of the jig can be improved, the joining quality can be improved, or the productivity of the blisk can be improved.

It is a flowchart of the blisk manufacturing method which concerns on embodiment. FIG. 2A is a perspective view of the blade component, and FIG. 2B is a diagram showing the blade component when viewed from the normal direction of the joint surface on the blade side. It is a conceptual diagram of the LFW apparatus which concerns on embodiment. It is a perspective view of the blade chuck jig in a state which does not hold a blade component. It is sectional drawing of the LFW apparatus during execution of the LFW process. 6A is a sectional view taken along the line AA of FIG. 5, and FIG. 6B is a sectional view taken along the line BB of FIG. It is sectional drawing of the LFW apparatus during execution of the LFW process. FIG. 8A is a front view of the blade chuck jig according to the embodiment showing a state in which the blade component is held, and FIG. 8B is a front view of the blade chuck jig according to the comparative example.

Hereinafter, embodiments will be described with reference to the drawings. The same or corresponding elements are designated by the same reference numerals throughout the drawings, and duplicate detailed description will be omitted.

(Blisk manufacturing method)
FIG. 1 shows a blisk 100 manufactured using the method together with a flowchart of a method for manufacturing the blisk 100 according to the embodiment. As shown at the bottom of FIG. 1, the blisk 100 includes a cylindrical disc 101 and a plurality of blades 102 that project radially from the outer peripheral surface of the disc 101, and the blades 102 are integrated with the disc 101. The blisk 100 is used as a component of a turbomachine such as an aircraft engine compressor.

In the manufacturing method according to the present embodiment, linear friction stir welding (LFW) is used to integrate the blade 102 with the disk 101. When the blisk 100 is newly manufactured, the manufacturing method includes a disk part preparation step S1, a blade part preparation step S2, an LFW step S3, and a finishing step S4.

In the disk component preparation step S1, the disk component 80, which is the original component of the disk 101, is prepared. The disc component 80 includes a cylindrical disc body 81 and a plurality of disc-side joints 82 provided on the outer peripheral surface of the disc body 81. The plurality of disc-side joints 82 are arranged on the outer peripheral surface of the disc body 81 at equal intervals in the circumferential direction. Each disk-side joint 82 is inclined and curved with respect to the axial direction of the disk body 81 and extends.

In the blade component preparation step S2, a plurality of blade components 90 (specifically, the same number as the disk side joints 82), which are the original components of the blade 102, are prepared. The blade component 90 includes a holding portion 91, a blade-side joint 92 provided on the base end side of the holding portion 91 in the blade width direction, and a blade main body 93 provided on the tip side of the holding portion 91 in the blade width direction. The holding portion 91 may be referred to as a "foot" and the blade side joint 92 may be referred to as a "stub". The blade body 93 is shaped to form the regular shape of the blade 102. The blade-side joint portion 92 is formed in a shape one size larger than the blade main body 93, and the holding portion 91 is formed in a shape one size larger than the blade-side joint portion 92 and the blade main body 93. The blade component 90 further includes a flange 94 provided at the proximal edge of the holding portion 91.

In the LFW step S3, the blade-side joint 92 of one blade component 90 is joined to one of the plurality of disk-side joints 82 of the disk component 80. When the LFW step S3 is executed, burrs 89 are generated between the joint portions 82 and 92. In the finishing step S4, the holding portion 91, the flange 94, the burr 89, and the like are removed by cutting. The disk-side joint 82 and the blade-side joint 92 may be cut. As a result, the blade component 90 as a whole is shaped so as to have a regular shape of the blade 102. Both parts 80 and 90 are manufactured from a titanium alloy forged material as an example.

The LFW step S3 and the finishing step S4 are executed for the number of blades 102, but the order thereof is not particularly limited. For example, after joining all the blade parts 90 to the disc parts 80, the finishing step S4 may be collectively executed. Half of the blade parts 90 are joined to the disk side joint 82 by skipping one in the circumferential direction, and after the completion, the finishing step S4 for half is executed, and the other half of the blade parts 90 are vacant. May be joined to and the remaining finishing step S4 may be performed.

The manufacturing method according to the present embodiment can be applied not only when the blisk 100 is newly manufactured but also when the blade 102 is repaired. When a defect occurs in the blade 102, first, the blade 102 is excised from the root. After that, the repaired blisk 100 can be manufactured by executing the blade component preparation step S2, the LFW step S3, and the finishing step S4 described above.

(Blade parts / blade parts preparation process)
As shown in FIGS. 2A and 2B, the blade-side joint portion 92 protrudes from the base end surface 91a of the holding portion 91 (or the base end surface of the flange 94) and is slightly tapered toward the base end side in the blade width direction. The blade-side joint portion 92 has a blade-side joint surface 92S and a peripheral surface 92c that connects the base end surface 91a of the holding portion 91 to the blade-side joint surface 92S. The disk-side joint portion 82 of the disk component 80 also has a disk-side joint surface 82S having the same shape as the blade-side joint surface 92S at its tip (see FIG. 3).

The blade-side joint surface 92S is formed at the base end of the blade component 90 as a whole. The blade-side joint surface 92S is flat and is formed in a shape in which the cross section of the blade main body 93 is slightly enlarged. The blade-side joint surface 92S has a dorsal ridge line 92a and a ventral ridge line 92b extending in the chord direction when viewed from its normal direction (approximately coincident with the wingspan direction). The dorsal ridge line 92a is convexly curved and has a bow shape. The ventral ridge line 92b may be curved so as to be convex on the same side as the dorsal ridge line 92a, and may have a curvature smaller than that of the dorsal ridge line 92a. The ventral ridge line 92b may be straight. The ventral ridge line 92b may be curved so as to be convex on the side opposite to the dorsal ridge line 92a. At both ends of the blade-side joint surface 92S in the chord direction, the ridges 92a and 92b are directly connected or are connected via a curve having a large curvature. The boundary 92d between the peripheral surface 92c and the base end surface 91a of the holding portion 91 is the blade-side joint surface 92S along the ridges 92a and 92b of the blade-side joint surface 92S when viewed from the normal direction of the blade-side joint surface 92S. Surrounds.

As its surface, the holding portion 91 has a base end surface 91a provided with a blade-side joint portion 92, a tip surface 91b provided with a blade body 93, and a peripheral surface 95 connecting the base end surface 91a and the tip surface 91b. is doing. The blade main body 93 is larger in the blade width direction than the blade side joint portion 92, and the holding portion 91 is positioned at the base end portion of the blade component 90 as a whole. The flange 94 is formed by projecting the base end edge portion of the peripheral surface 95 of the holding portion 91 outward over the entire circumference.

The peripheral surface 95 of the holding portion 91 includes a dorsal surface 95a, a ventral surface 95b, a first side surface 95c, and a second side surface 95d. The dorsal surface 95a and the ventral surface 95b extend in the approximate chord direction and the approximate wingspan direction and face each other in the approximate blade thickness direction. The first side surface 95c and the second side surface 95d extend in the approximate blade thickness direction and the approximate blade width direction, and face each other in the approximate chord direction. The first side surface 95c and the second side surface 95d connect the ends of the dorsal surface 95a and the ventral surface 95b in the chord direction.

The holding portion 91 is formed in a shape in which the blade-side joint portion 92 is slightly enlarged when viewed from the normal direction of the blade-side joint surface 92S. The peripheral surface 95 of the holding portion 91 is curved along the blade side joint portion 92 and the blade main body 93.

The dorsal surface 95a extends in the chord direction outside the dorsal surface 93a of the blade body 93 and the dorsal ridge 92a of the blade joint surface 92S and is curved along the corresponding ridge, the dorsal ridge 92a. ing. When the ends of the dorsal surface 95a in the chord direction are connected by a line when viewed from the normal direction of the blade-side joint surface 92S, the line passes through the blade-side joint 92 (also in the comparative example of FIG. 8B). reference).

The ventral surface 95b extends in the chord direction outside the ventral surface 93b of the blade body 93 and the ventral ridge 92b of the blade joint surface 92S and is curved along the corresponding ridge, the ventral ridge 92b. ing. By forming the peripheral surfaces of the holding portion 91 (particularly, the dorsal surface 95a and the ventral surface 95b) in this way, the holding portion 91 is miniaturized in the blade thickness direction.

The first side surface 95c and the second side surface 95d are formed in a substantially planar shape. As a result, the holding portion 91 is prevented from becoming large in the chord direction.

(LFW device / LFW process)
FIG. 3 is a conceptual diagram of the LFW device 1 according to the embodiment. The LFW device 1 is a device that executes the above-mentioned LFW step S3 (see FIG. 1), and joins the blade component 90 to the disk component 80 by LFW. Note that FIG. 3 shows a state in which no blade component 90 is joined to the disk component 80.

The LFW device 1 includes a disk jig unit 2, a blade jig unit 3, and a control unit 4. The disc jig unit 2 includes a disc support jig 5, a rotary actuator 6, and a pressurizing unit 7. The blade jig unit 3 includes a blade chuck jig 10 and a vibration applying portion 8. The control unit 4 controls the operations of the rotary actuator 6, the pressurizing unit 7, and the vibration applying unit 8. The rotary actuator 6 is, for example, a hydraulic motor or an electric motor. The pressurizing unit 7 and the vibration applying unit 8 are, for example, hydraulic cylinders.

The blade chuck jig 10 can hold one blade component 90 by chucking the holding portion 91 (see FIG. 5). When the blade component 90 is held by the blade chuck jig 10, the blade side joint portion 92 is exposed.

The disc support jig 5 rotatably supports the disc component 80 around its central axis. Further, the disc support jig 5 has a contact position where the disc component 80 supported by itself is separated from the blade component 90 held by the blade chuck jig 10 and a contact where the disk component 80 comes into contact with the blade component 90. It can move linearly with and from the position. Note that FIG. 3 shows a state in which the disc support jig 5 is positioned at a separated position.

The rotary actuator 6 rotates the disc component 80 supported by the disc support jig 5 around its central axis. The rotary actuator 6 rotates the disk component 80 and stops the rotation of the disk component 80 at a rotation position where one disk-side joint 82 faces the blade-side joint 92 held by the blade chuck jig 10. .. Regarding the disk-side joint portion 82 and the blade-side joint portion 92 that are opposed to each other, the disk-side joint surface 82S is arranged in parallel with the blade-side joint surface 92S (the normal direction of the disk-side joint surface 82S is the blade-side joint surface). Consistent with the normal direction of 92S).

The pressurizing unit 7 applies a unidirectional thrust to the disc support jig 5 and the disc component 80 supported by the disc support jig 5, and moves the disc support jig 5 between the separation position and the contact position. The moving direction of the disc support jig 5 or the direction of the thrust applied to the disc support jig 5 by the pressurizing unit 7 coincides with the normal direction of both joint surfaces 82S and 92S which are in a facing relationship. By positioning the disc support jig 5 at the contact position, both joint surfaces 82S and 92S can be brought into surface contact with each other. The pressurizing unit 7 can further apply thrust to the disc support jig 5 in this surface contact state. The blade chuck jig 10 is responsible for this thrust, and the blade side joint portion 92 is in pressure contact with the disc side joint portion 82.

Under such a pressurizing condition, the vibration applying unit 8 vibrates (in other words, linearly reciprocates) the blade chuck jig 10 and the blade component 90 held by the blade chuck jig 10. As a result, frictional heat is generated on both joint surfaces 82S and 92S, plastic flow is generated on both joint portions 82 and 92, and the blade component 90 held by the blade chuck jig 10 is integrated with the disk component 80. .. The vibration direction is perpendicular to the pressurizing direction. When the disk component 80 is supported horizontally and the pressurizing direction and the vibration direction are horizontal, both joint surfaces 82S and 92S extend vertically.

When the joining of one blade component 90 is completed, the disk support jig 5 and the disk component 80 are moved to the separated positions. As a result, the joined blade component 90 is released from the blade chuck jig 10.

In the present embodiment, the vibration direction in the LFW step S3 is the direction in which the blade thickness direction of the blade component 90 held by the blade chuck jig 10 is the main component of the blade thickness direction and the chord direction. The blade component 90 may be twisted by the blade body 93, in which case the chord direction and the blade thickness direction change depending on the position in the blade width direction. As an example, the "blade thickness direction" and the "blade chord direction" in the definition of the vibration direction may be the blade thickness direction and the chord direction on the blade-side joint surface 92S. The "direction mainly composed of the blade thickness direction" means that the angle formed by the vibration direction with the blade thickness direction on the blade side joint surface 92S is smaller than the angle formed with the blade chord direction on the blade side joint surface 92S. It may mean that. To put it simply, the vibration direction is substantially the blade thickness direction.

From another point of view, the vibration direction is the vibration direction of the disc body 81 at the portion where the disc side joint 82 that is in pressure contact with the blade side joint 92 is provided when the disc body 81 is viewed from the axial direction. The direction in which the tangent line T (see FIGS. 3 and 5) extends. If the vibration direction is substantially the chord direction, the vibration direction substantially coincides with the axial direction of the disc body 81.

(Blade chuck jig)
FIG. 4 shows a perspective view of the blade chuck jig 10 shown in a state where the blade component 90 (see FIG. 3) is not held. The blade chuck jig 10 has an accommodating member 11 and a chuck member 20. Hereinafter, for convenience of explanation, the pressurizing direction is referred to as “front-back direction”, and the disc jig unit 2 (see FIG. 3) and the proximal side are referred to as “front”. Further, the direction perpendicular to both the pressurizing direction and the vibration direction is simply referred to as "vertical direction Z".

The accommodating member 11 forms an accommodating space 11a open on both front and rear sides in the center thereof. The accommodation space 11a is formed in a rectangular shape when viewed from the front. The chuck member 20 is housed in the storage space 11a.

The accommodating member 11 is composed of two parts, a cassette main body 12 and a lid body 13, and these two parts are separably connected in the vibration direction. The cassette body 12 is formed in a substantially U shape as a whole. The cassette main body 12 has a base portion 12a extending in the vertical direction Z, and a pair of extending portions 12b and 12c extending from both ends of the base portion 12a on the same side in the vibration direction. The lid body 13 is formed in a flat plate shape, is fixed to the tip surfaces of a pair of extending portions 12b, 12c, and connects the tip portions of the extending portions 12b, 12c to each other in the vertical direction Z. The accommodation space 11a is surrounded by the portions 12a to 12c and the lid 13.

The chuck member 20 is formed in an H shape. The chuck member 20 has a holding wall 21 that forms a storage space 22 in which the blade component 90 is housed. The holding wall 21 extends in the substantially vertical direction Z at the central portion of the accommodation space 11a. Specifically, it is slightly inclined in the vibration direction with respect to the vertical direction Z. The storage space 22 is formed so as to penetrate the holding wall 21 in the front-rear direction, extends in the front-rear direction, and is opened on both front and rear sides. Of the blade parts 90, the blade side joint portion 92 is not stored in the storage space 22 and is exposed in front of the chuck member 20.

The chuck member 20 has a pair of support walls 23 and 24 extending from both ends of the holding wall 21 in the vertical direction to both sides in the vibration direction. The support wall 23 is overlapped with the inner surface of the accommodating member 11 (inner surface of the extending portion 12b, the inner surface of the base portion 12a and the inner surface of the lid 13), and the support wall 24 is an inner surface of the accommodating member 11 (inner surface of the extending portion 12c). It is overlapped on the inner surface, the inner surface of the base portion 12a, and the inner surface of the lid 13). As a result, the chuck member 20 is accommodated in the accommodating space 11a in a state where movement and rotation with respect to the accommodating member 11 are restricted. The support walls 23 and 24 may be directly contacted and stacked on the inner surface of the accommodating member 11, or may be stacked via a spacer.

The chuck member 20 is composed of two parts, a first chuck member 30 and a second chuck member 40, which are separated in the vibration direction. The first chuck member 30 has a first holding wall 31 extending substantially in the vertical direction Z in the accommodation space 11a, and a first recess 32 recessed in the first holding wall 31 in the vibration direction. The second chuck member 40 has a second holding wall 41 extending substantially in the vertical direction Z in the accommodation space 11a, and a second recess 42 recessed in the second holding wall 41 in the vibration direction. The first holding wall 31 and the second holding wall 41 are overlapped in the accommodation space 11a in the vibration direction, and these two holding walls 31 and 41 form the holding wall 21. The second recess 42 is recessed on the side opposite to the first recess 32 in the vibration direction, is continuous with the first recess 32 in the vibration direction, and forms one storage space 22 together with the first recess 32. The first recess 32 and the second recess 42 are formed in a groove shape over the entire front-rear direction of the holding walls 31 and 41. The first holding wall 31 and the second holding wall 41 are in close contact with each other on both sides in the vertical direction Z with respect to the storage space 22.

The first chuck member 30 has a pair of first support walls 33 and 34 extending in the vibration direction from both ends of the first holding wall 31 in the vertical direction Z. The second chuck member 40 includes a second support wall 43 extending in the vibration direction from one end of the second holding wall 41 in the vertical direction Z, and a second support provided at the other end of the second holding wall 41 in the vertical direction Z. It has a wall 44. The first support wall 33 and the second support wall 43 are overlapped in the vibration direction to form the support wall 23 described above. The first support wall 34 and the second support wall 44 are overlapped in the vibration direction to form the support wall 24 described above. The first support walls 33 and 34 are superposed on the inner surface of the base portion 12a, and the second support walls 43 and 44 are superposed on the inner surface of the lid 13.

The blade chuck jig 10 forms a first retract space 10a and a second retract space 10b for accommodating the blade component 90 joined to the disk component 80 on both sides of the holding wall 21 in the vibration direction (FIGS. 7 and 7). See also 8A).

In this respect, the first chuck member 30 is formed in a substantially U shape as a whole. The first chuck member 30 forms a space 35 surrounded by the first holding wall 31 and the first support walls 33 and 34. A recess 12d, which is largely cut out from the front to the rear, is formed in the vertical Z center of the base portion 12a of the cassette body 12. The recess 12d is continuous with the space 35 in the vibration direction, whereby the first evacuation space 10a is formed on the side of the first holding wall 31 opposite to the second holding wall 41.

Further, the second chuck member 40 also forms a space 36 surrounded by the second holding wall 41 and the second support walls 43 and 44. The space 36 is formed on the side opposite to the space 35 in the vibration direction with respect to the storage space 22. A recess 13a, which is largely cut out from the front surface to the rear surface, is also formed in the central portion of the lid body 13 in the vertical direction Z. The recess 13a is continuous with the space 36 in the vibration direction, whereby a second evacuation space 10b is formed on the side of the second holding wall 41 opposite to the first holding wall 31.

5 is a cross-sectional view of the LFW device 1 during execution of the LFW step S3, FIG. 6A is a cross-sectional view taken along the line AA of FIG. 5, and FIG. 6B is a cross-sectional view taken along the line BB of FIG. The storage space 22 includes a holding portion storage portion 25 at the front end (see FIGS. 5 and 6A) and a main body storage portion 26 (see FIGS. 5 and 6B) continuous rearward from the holding portion storage portion 25. ..

With reference to FIG. 5, in the step of chucking the blade component 90 to the blade chuck jig 10, the blade component 90 is inserted into the storage space 22 from the blade main body 93 through the front opening of the storage space 22. This insertion operation may be performed manually or automatically by a manipulator. The blade main body 93 is stored in the main body storage portion 26, and the holding portion 91 is stored in the holding portion storage portion 25. The flange 94 cannot pass through the front opening of the storage space 22, and is abutted against the front surface of the chuck member 20. As a result, the entry of the blade component 90 into the storage space 22 is restricted. The blade-side joint portion 92 projects from the base end surface 91a (base end surface of the flange 94) of the holding portion 91. Therefore, the blade-side joint portion 92 is positioned outside the storage space 22 and is exposed in front of the blade chuck jig 10.

With reference to FIGS. 5 and 6A, the peripheral surface 95 of the holding portion 91 is in close contact with the inner surface of the holding portion accommodating portion 25. In other words, the inner surface of the holding portion accommodating portion 25 has the same cross-sectional shape as the peripheral surface 95 of the holding portion 91. In the present embodiment, both the dorsal surface 95a and the ventral surface 95b of the peripheral surface 95 are curved. The inner surface 32a of the first recess 32 and the inner surface 42a of the second recess 42 face the holding portion storage portion 25 in the storage space 22. The inner surface 32a of the first recess 32 abuts on the dorsal surface 95a, which is the corresponding surface of the two surfaces 95a and 95b, but is curved so as to be aligned with the dorsal surface 95a. The inner surface 42a of the second recess 42 abuts on the ventral surface 95b, which is the corresponding surface of the two surfaces 95a and 95b, but is curved so as to be aligned with the ventral surface 95b. With reference to FIGS. 5 and 6B, the blade main body 93 is housed in the main body storage portion 26 in a state of being separated from the inner surface of the main body storage portion 26.

In FIG. 5, the disk component 80 pressurizes the blade component 90 to the left, and the blade component 90 vibrates in the vertical direction. The blade component 90 stops entering the storage space 22 when the flange 94 abuts on the front surface of the blade chuck jig 10. In this state, the edge of the front opening of the storage space 22 corresponds to a pair of L-shaped angles formed by the rear surface of the flange 94 and the dorsal surface 95a or ventral surface 95b of the holding portion 91. Therefore, as shown by the black arrow in FIG. 5, a part of the load generated by pressurization and vibration during the execution of the LFW step S3 is obliquely input from the edge of the storage space 22 to the L-shaped angle. In this way, when the blade component 90 bears the load, the load carried by the blade chuck jig 10 can be reduced. Therefore, the durability of the blade chuck jig 10 is improved.

Since the load is obliquely input to the L-shaped angle, the blade component 90 may be deformed so that the L-shaped angle is widened. However, the flange 94 protrudes from the base end edge portion of the holding portion 91. Although the shape of the blade 102 is shown by a chain double-dashed line in FIG. 5, the flange 94 and the holding portion 91 are cut in the finishing step S4. The portion of the blade component 90 that bears a large load is not required in the completed state of the blisk 100. Therefore, even if the deformation occurs, the quality of the blisk 100 is not adversely affected.

Further, as shown in FIG. 6A, when the cross section is taken from the pressurizing direction, the load generated by the vibration during the execution of the LFW step S3 is the dorsal surface 95a and the ventral surface 95b of the holding portion 91, and the ventral surface 95b. It is handled by the inner surfaces 32a and 42a of the chuck member 20 which is in surface contact with these. If the vibration direction is the chord direction, the load is handled by the two side surfaces 95c and 95d of the holding portion 91. Of the peripheral surfaces 95, all four surfaces 95a to 95d extend in the blade width direction, but the dorsal surface 95a and the ventral surface 95b extend in the chord direction, while the two side surfaces 95c and 95d extend in the blade thickness direction. ing. The chord length is longer than the wing thickness. Therefore, the dorsal surface 95a and the ventral surface 95b have a larger area than the two side surfaces 95c and 95d. Since the vibration direction is approximately the blade thickness direction (disc body tangential direction), the vibration direction is per unit area to be handled by the holding portion 91 and the chuck member 20 as compared with the case where the vibration direction is the chord direction (disk body axial direction). The load can be reduced.

Therefore, the durability of the chuck member 20 can be maintained even if the blade width direction dimension and the blade thickness direction dimension of the holding portion 91 are shortened. Further, since the volume of the holding portion 91 can be reduced, the workload of the finishing step S4 can be reduced, and the productivity of the blisk 100 is improved.

FIG. 7 is a cross-sectional view of the LFW device 1 during execution of the LFW step S3. FIG. 7 shows a state in which the last one blade component 90 is joined to the disk component 80 when the manufacturing method in which all the blade components 90 are joined by LFW and then the finishing step S4 is collectively performed is adopted. .. The joined blade component 90 is housed in the first retracted space 10a and the second retracted space 10b described above, whereby the LFW step S3 can be executed without interfering with the joined blade component 90.

FIG. 8A is a front view of the blade chuck jig 10 according to the embodiment, and FIG. 8B is a front view of the blade chuck jig 910 according to a comparative example. In the comparative example, the holding portion 991 is formed in a rectangular shape that is one size larger than the blade-side joint portion 992. The dorsal surface 995a and the ventral surface 995b of the holding portion 991 are planar parallel to each other. The line connecting both ends of the dorsal surface 995a in the chord direction represents the dorsal surface 995a itself and does not intersect the blade side joint 992.

In the embodiment, as described above, the holding portion 91 has a dorsal surface 95a and a ventral surface 95b curved along the blade side joint 92. Therefore, when viewed from the normal direction of the blade-side joint surface 92S, the outer contour of the holding portion 91 is smaller than the outer contour of the holding portion 991 according to the comparative example. The volume of the holding portion 91 is also smaller than the volume of the holding portion 991 according to the comparative example.

By forming the holding portion 91 in this way, the thickness D30 of the first holding wall 31 and the thickness D40 of the second holding wall can be increased. Here, the thickness D30 refers to the dimension in the vibration direction from the inner surface 32a of the first recess 32 to the space facing surface 31a of the first holding wall 31 facing the space 35. The thickness D40 refers to the dimension in the vibration direction from the inner surface 42a of the second recess 42 to the space facing surface 41a of the second holding wall 41 facing the space 45. The wall portion defined by the inner surfaces 32a and 42a and the space facing surfaces 31a and 41a greatly contributes to the load generated during the execution of the LFW step S3. Therefore, ensuring a large thickness D30 and D40 of the wall portion greatly contributes to the improvement of the rigidity of the blade chuck jig 10 (chuck member 20). When the rigidity of the blade chuck jig 10 is increased, the position accuracy of the blade component 90 with respect to the disk component 80 during the execution and the end of the LFW step S3 is increased, which leads to an improvement in joining quality.

However, it is necessary to form evacuation spaces 10a and 10b for retracting the adjacent blade parts 90 on both sides in the vibration direction with respect to the holding wall 21 (the first sandwiching wall 31 and the second sandwiching wall 41 that are overlapped with each other). be. Therefore, there is a limit to keeping the positions of the space facing surfaces 31a and 41a away from the inner surfaces 32a and 42a. That is, there are restrictions on securing the thicknesses D30 and D40.

In the comparative example, since the outer contour of the holding portion 991 is large as described above, it is necessary to form the first recess 932 and the second recess 942 deeply in the first holding wall 931 and the second holding wall 941. Since the holding portion 991 of the adjacent blade component 90 is also naturally large, it is difficult to thicken the first holding wall 931 and the second holding wall 941. Therefore, the thicknesses D930 and D940 become smaller.

On the other hand, in the embodiment, since the outer contour of the holding portion 91 becomes smaller, the first recess 32 and the second recess 42 can be made shallower. Further, since the holding portion 91 of the adjacent blade component 90 is also naturally miniaturized, it is allowed to keep the space facing surfaces 31a and 41a away from the inner surfaces 32a and 42a. The space facing surface 31a may be curved along the ventral surface 95b of the adjacent blade component 90, and the space facing surface 41a may be curved along the dorsal surface 95a of the adjacent blade component 90. good. Therefore, the thicknesses D30 and D40 become large. Therefore, the position accuracy of the blade component 90 is improved, and the joining quality is improved. Further, by minimizing the expansion of the thicknesses D30 and F40 (separation of the space facing surfaces 31a and 41a from the storage space 22) while reducing the size of the holding portion 91, the blisk 100 having a narrow blade 102 pitch can be manufactured. It will also be possible to respond.

(Modification example)
Although the embodiments have been described so far, the above configurations can be added, deleted or changed as appropriate within the scope of the present invention.

For example, both the dorsal and ventral surfaces of the blade component 90 are curved, but only one of them may be curved. As for the inner surfaces 32a and 42a of the storage space 22, only those that match the curved surface need to be curved. When curved to both sides, both the storage space 22 can be made shallow and the holding wall 21 can be made thick, and the thicknesses D30 and D40 can be made larger.

3 Blade jig unit 8 Vibration applying part 10 Blade chuck jig 20 Chuck member 21 Holding wall 22 Storage space 32a Inner surface 42a Inner surface 80 Disc part 90 Blade part 91 Holding part 92 Blade side joint 92a Dorsal ridge 92b Ventral ridge 92S Blade side joint surface 95a Dorsal surface 95b Ventral surface 100 Brisk S2 Blade parts preparation process S3 LFW process S4 Finishing process

Claims (5)

A step of preparing a blade component, wherein the blade component has a blade-side joint surface formed at its base end and a holding portion held by a blade chuck jig.
An LFW step of joining the blade-side joint surface of the blade component held by the blade chuck jig to the disk component by linear friction stir welding.
It is provided with a finishing process for cutting the holding portion.
In the blade component preparation process
When viewed from the normal direction of the blade-side joint surface, the blade-side joint surface forms a pair of ridges extending in the chord direction, and the holding portion is a dorsal extending in the chord direction outside the pair of ridges. Has lateral and ventral surfaces,
At least one of the dorsal and ventral surfaces is curved along the corresponding ridge.
A method for manufacturing a brisk, which vibrates the blade chuck jig and the blade parts held by the blade chuck jig in the direction in which the blade thickness direction is the main component in the blade thickness direction and the blade chord direction in the LFW step. The method for producing a blisk according to claim 1, wherein both the dorsal surface and the ventral surface are curved along the corresponding ridges. In the blade component preparation step, the blade component further has a flange protruding from the holding portion.
In the LFW step, the flange is abutted against the outer surface of the blade chuck jig, and the flange is abutted against the outer surface of the blade chuck jig.
The method for producing a blisk according to claim 1 or 2, wherein the flange is machined in the finishing step. A blade part that is joined to a disk part by linear friction stir welding.
A blade-side joint surface formed at the base end and joined to the disk component,
It is equipped with a holding part that is held by the blade jig unit during linear friction stir welding.
When viewed from the normal direction of the blade-side joint surface, the blade-side joint surface forms a pair of ridges extending in the chord direction, and the holding portion is a dorsal extending in the chord direction outside the pair of ridges. A blade component having a lateral surface and a ventral surface, wherein at least one of the dorsal surface and the ventral surface is curved along a corresponding ridge. A blade jig unit used when joining a blade component to a disk component by linear friction bonding, and the blade component is formed at a base end thereof and is bonded to the disk side component, and a blade side bonding surface, and Having a holding portion, the blade-side joining surface forms a pair of ridges extending in the chord direction when viewed from the normal direction of the blade-side joining surface, and the holding portion is outside the pair of ridges. It has a dorsal surface and a ventral surface extending in the chord direction, and at least one of the dorsal surface and the ventral surface is curved along the corresponding ridgeline.
The blade jig unit
A blade chuck jig that holds the blade parts and
The blade chuck jig and a vibration applying portion for vibrating the blade parts held by the blade chuck jig are provided.
The blade chuck jig has a holding wall forming a storage space for storing the blade parts, and the holding wall faces the storage space and comes into contact with the dorsal surface and the ventral surface. It has an inner surface, and at least one of the pair of inner surfaces is curved so as to be aligned with the corresponding surface, and the vibration applying portion is mainly composed of the blade thickness direction of the blade thickness direction and the chord direction. A blade jig unit that vibrates the blade component in the direction.

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