Size shape control device for hot isostatic pressing near-net forming of annular piece

Abstract

The utility model relates to the field of powder metallurgy, in particular to a size shape control device for hot isostatic pressing near-net forming of an annular piece, which comprises a tray, at least one layer of shape control mechanism is arranged on the tray, the shape control mechanism comprises a shaping core and a sheath which are coaxially arranged, the sheath is sleeved on the periphery of the shaping core, and the shape control mechanism is arranged on the tray. At least two wedge blocks are uniformly distributed on the outer peripheral surface of the shaping core between the shaping core and the sheath, and the inner surface of each wedge block is matched with the outer surface structure of the shaping core, so that the wedge blocks are attached to the shaping core; and the sheath is in clearance fit with all the wedge blocks which are uniformly distributed on the peripheral surface of the shaping core. According to the utility model, the problem of ovalization of the sheath in the hot isostatic pressing process is limited to the greatest extent, a remarkable shape control effect on the sheath is achieved, meanwhile, the boundary dimension error of the obtained annular piece and the target piece is very small, the utilization rate of powder is increased, and the process cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the field of powder metallurgy, and particularly relates to a size control device for near-net forming of a ring-shaped part by hot isostatic pressing. Background Art

[0002] The turbine disk is an important component of an aeroengine. The turbine disk produced by the hot isostatic pressing process has the characteristics of uniform structure and excellent performance. Before the hot isostatic pressing process, it is necessary to fill powder into the mold (referred to as the shroud) required for manufacturing the turbine disk. During the powder filling process, in order to ensure the powder filling amount, the shroud is in a vibrating state. However, the vibration will cause the powder density at the bottom in the powder filling direction to be large and the powder density at the top in the powder filling direction to be small. During the hot isostatic pressing process, since the pressures and temperatures received by each direction of the shroud are the same, after the hot isostatic pressing is completed, the entire shroud presents an elliptical shape feature, which will cause the gap between the shape of the shroud after detachment and the target part to be too large, which is not conducive to near-net forming and also causes waste of powder.

[0003] In view of this, the inventor provides a size control device and system for near-net forming of a ring-shaped part by hot isostatic pressing to solve the above technical problems. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above-mentioned disadvantages of the prior art and provide a size control device for near-net forming of a ring-shaped part by hot isostatic pressing. The device includes at least one layer of size control mechanism. The size control mechanism includes a sizing core, a shroud, and a wedge block. The cooperation of the three solves the problem of ellipticity of the shroud during the hot isostatic pressing process. At the same time, the dimensional error between the obtained ring-shaped part and the target part is very small, and the powder utilization rate is improved.

[0005] The purpose of the utility model is solved by the following technical solutions:

[0006] The utility model provides a size control device for near-net forming of a ring-shaped part by hot isostatic pressing, including a tray. At least one layer of size control mechanism is arranged on the tray. The size control mechanism includes a sizing core and a shroud arranged coaxially. The shroud is sleeved on the outer periphery of the sizing core. At least two wedge blocks are evenly arranged between the sizing core and the shroud on the outer surface of the sizing core. And the inner surface of each wedge block is adapted to the outer surface structure of the sizing core so that the wedge block fits with the sizing core;

[0007] The shroud is in clearance fit with all the wedge blocks evenly arranged on the outer periphery of the sizing core.

[0008] Specifically, the clearance is about 0.5 mm to 1 mm.

[0009] Further preferably, the number of the wedge blocks is 4 to 8.

[0010] Further, the sizing core is frustum-shaped, and at least two wedge blocks adapted to its structure are evenly arranged on the outer peripheral surface of the frustum shape.

[0011] Specifically, the included angle between the side and the bottom of the frustum shape is 80° - 85°.

[0012] Further, an annular groove is formed on the upper surface of the tray, and one end of each wedge block at the top of the tray is inserted into the annular groove, and the other end is located at the top of the sizing core and the casing.

[0013] Further, each wedge block is composed of a vertical plate and a sector-shaped horizontal plate. The sector-shaped horizontal plate is arranged at the top of the vertical plate, and the connection between the inner side surface of the vertical plate and the sector-shaped horizontal plate is a transition arc surface structure. The cross-section of the connection between the outer side surface of the vertical plate and the sector-shaped horizontal plate is a T-shaped structure;

[0014] The bottom of the vertical plate is inserted into the annular groove, one end of the sector-shaped horizontal plate is placed on the top of the sizing core, and the other end is placed on the top of the casing.

[0015] Further, the vertical plate and the sector-shaped horizontal plate are integrally formed.

[0016] Further, an arc-shaped groove is formed along the radial direction on the upper surface of the sector-shaped horizontal plate, so that the bottom of the upper wedge block can be inserted into the arc-shaped groove. The groove width of the arc-shaped groove is greater than the thickness of the bottom of the vertical plate.

[0017] Specifically, the central angle of the upper surface of the sector-shaped horizontal plate is 60° - 80°, and its inner diameter is 100 mm - 150 mm.

[0018] Further, a first connection hole is formed on the upper surface of the sector-shaped horizontal plate, inside the arc-shaped groove.

[0019] Further, a second connection hole for connecting a lifting member is formed at the center of the top of the sizing core; a plurality of third connection holes for connecting a lifting member are evenly formed on the top of the sizing core, in the circumferential direction of the second connection hole.

[0020] Specifically, the diameter of the second connection hole is 80 mm - 120 mm; the depth of the third connection hole is 20 mm - 35 mm.

[0021] Further, a plurality of fourth connection holes are evenly formed on the top of the tray, in the circumferential direction of the annular groove.

[0022] Further, the tray, the wedge block, and the sizing core are all made of 45 steel material; the casing is made of low-carbon steel.

[0023] The control device of the utility model has a simple structure, is convenient for processing, and has a low manufacturing cost. It can be used to manufacture turbine disks for aeroengines, and solves the technical problem that it is difficult to control the shape of the jacket structure during the hot isostatic pressing process.

[0024] Compared with the prior art, the technical solution provided by the utility model has the following beneficial effects:

[0025] 1) A size control device for near-net forming of hot isostatic pressing of annular parts provided by the utility model includes a tray, and at least one layer of control mechanism is arranged on the tray. The control mechanism includes a shaping core, a jacket, and a wedge block. The jacket is sleeved on the outer periphery of the shaping core. At least two wedge blocks are evenly arranged between the shaping core and the jacket on the outer peripheral surface of the shaping core, and all the wedge blocks evenly arranged on the outer peripheral surfaces of the jacket and the shaping core are in clearance fit. During hot isostatic pressing, the whole device is forced to contract inward. Due to the taper fit between the wedge block and the shaping core, the shaping core, the jacket, and the wedge block can achieve self-locking fixation. Therefore, there is no phenomenon of free contraction of the jacket, which maximally limits the problem of ovalization of the jacket during the hot isostatic pressing process, has a significant control effect on the jacket, and the outer shape of the device does not change significantly before and after shape control and can be reused. At the same time, the dimensional error between the obtained annular part and the target part is very small, which increases the powder utilization rate and effectively reduces the process cost;

[0026] 2) When the size control device for near-net forming of hot isostatic pressing of annular parts provided by the utility model is loaded into the furnace during production, multiple jackets are usually stacked up and down. The traditional process usually uses spacer blocks to separate each layer, but the spacer blocks will leave pits on the surface of the jacket. The control device of the utility model has an arc-shaped groove opened on the upper surface of the wedge block, and the bottom of the upper wedge block can be placed in the arc-shaped groove on the top of the lower wedge block. This design is more convenient for stacking the jackets and also solves the problem of pits left on the surface of the jacket by the spacer blocks. Description of the Drawings

[0027] The drawings here are incorporated into the specification and form a part of this specification, and are used together with the specification to explain the principle of the utility model.

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic structural diagram of the control device of the utility model;

[0030] Figure 2Schematic structural diagram of the shape control device according to Embodiment 2 of the present utility model;

[0031] Figure 3 Schematic structural diagram of the wedge block of the shape control device of the present utility model;

[0032] Figure 4 Schematic structural diagram of the sizing core of the shape control device of the present utility model;

[0033] Figure 5 Schematic structural diagram of the tray of the shape control device of the present utility model;

[0034] Figure 6 Schematic structural diagram of the sleeve of the shape control device of the present utility model.

[0035] Wherein: 1 is the tray; 2 is the shape control mechanism; 11 is the annular groove; 12 is the fourth connection hole; 21 is the sizing core; 22 is the sleeve; 23 is the wedge block; 211 is the second connection hole; 212 is the third connection hole; 231 is the vertical plate; 232 is the fan-shaped horizontal plate; 2321 is the arc groove; 2322 is the first connection hole. Detailed implementation manners

[0036] Here, the exemplary embodiments will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementation manners described in the following exemplary embodiments do not represent all implementation manners consistent with the present utility model. On the contrary, they are merely examples of the devices consistent with some aspects of the present utility model detailed in the appended claims.

[0037] In order to enable those skilled in the art to better understand the technical solutions of the present utility model, the present utility model will be further described in detail below with reference to the drawings and embodiments.

[0038] Embodiment 1

[0039] Refer to Figure 1 、 Figures 3 to 6 , the embodiment of the present utility model provides a size control device for hot isostatic pressing near-net forming of annular parts, including a circular tray 1, on which a layer of shape control mechanism 2 is arranged. The shape control mechanism 2 includes a sizing core 21 and a sleeve 22 arranged coaxially. The sleeve 22 is sleeved on the outer periphery of the sizing core 21. Four wedge blocks 23 are evenly arranged between the sizing core 21 and the sleeve 22 on the outer peripheral surface of the sizing core 21, and the inner surface of each wedge block 23 is adapted to the outer surface structure of the sizing core 21 so that the wedge block 23 is in close fit with the sizing core 21;

[0040] The sleeve 22 is in clearance fit with all the wedge blocks 23 evenly arranged on the outer peripheral surface of the sizing core 21.

[0041] Specifically, the outer diameter dimension of the sizing core 21 after being assembled with the four wedges 23 is smaller than the inner diameter dimension of the jacket 22, and the two are in clearance fit, with a clearance of about 0.8 mm.

[0042] As Figure 6 shown, the structure of the jacket 22 is a concentric and coaxial ring with different outer and inner diameters, forming an annular cavity. The annular cavity is a powder filling area. In the hot isostatic pressing process, under the influence of high temperature and high pressure, the jacket 22 and the powder as a whole shrink inward, and the height of the jacket 22 is the same as that of the sizing core 21.

[0043] In this embodiment, the outer diameter of the assembled jacket 22, wedges 23 and sizing core 21 is smaller than the diameter of the tray 1. After assembly, they are placed on the tray 1.

[0044] Further, the sizing core 21 is in the shape of a frustum of a cone, and four wedges 23 adapted to its structure are evenly arranged on the outer peripheral surface of the frustum shape. Specifically, the included angle between the side and the bottom of the frustum shape is 80°.

[0045] Further, an annular groove 11 is formed on the upper surface of the tray 1. One end of each wedge 23 at the top of the tray 1 is inserted into the annular groove 11, and the other end is located at the top of the sizing core 21 and the jacket 22.

[0046] In this embodiment, the depth of the annular groove 11 is 5 mm; each wedge 23 is 5 mm higher than the sizing core 21 so that the bottom of the wedge 23 can be inserted into the annular groove 11.

[0047] Specifically, each wedge 23 is composed of a vertical plate 231 and a sector-shaped horizontal plate 232. The sector-shaped horizontal plate 232 is arranged on the top of the vertical plate 231. The connection between the inner side surface of the vertical plate 231 and the sector-shaped horizontal plate 232 is a transitional arc surface structure, and the cross-section of the connection between the outer side surface of the vertical plate 231 and the sector-shaped horizontal plate 232 is a T-shaped structure;

[0048] The bottom of the vertical plate 231 is inserted into the annular groove 11. One end of the sector-shaped horizontal plate 232 is placed on the top of the sizing core 21, and the other end is placed on the top of the jacket 22.

[0049] In this embodiment, the vertical plate 231 and the sector-shaped horizontal plate 232 are integrally formed.

[0050] Further, an arc-shaped groove 2321 with a groove depth of 5 mm is formed along the radial direction on the upper surface of the sector-shaped horizontal plate 232. The groove width of the arc-shaped groove 2321 is larger than the thickness of the bottom of the vertical plate 231 so that the upper wedge 23 can be inserted into the arc-shaped groove 2321.

[0051] Specifically, in this embodiment, the central angle of the sector-shaped horizontal plate 232 is 60°, and its inner diameter is 100 mm.

[0052] Furthermore, on the upper surface of the sector-shaped horizontal plate 232, a first connection hole 2322 is opened inside the arc-shaped groove 2321. Specifically, the first connection hole 2322 is an M12 threaded hole, and a lifting ring is installed in cooperation with the M12 threaded hole for the lifting work of the wedge block 23.

[0053] Furthermore, at the center of the top of the sizing core 21, a second connection hole 211 for connecting a lifting ring is opened; on the top of the sizing core 21, four third connection holes 212 for connecting a lifting ring are evenly opened in the circumferential direction of the second connection hole 211. Specifically, the second connection hole 211 is a threaded through hole with a diameter of 80 mm; the third connection hole 212 is an M12 threaded hole with a depth of 20 mm, and lifting rings are installed in cooperation with the threaded through hole and the M12 threaded hole respectively for the lifting work of the sizing core 21.

[0054] Furthermore, on the top of the tray 1, four fourth connection holes 12 are evenly opened in the circumferential direction of the annular groove 11. Specifically, the fourth connection hole 12 is an M12 threaded through hole for lifting. Since the isostatic press furnace is relatively deep, a crane is required to assemble the fittings, so lifting is needed.

[0055] In this embodiment, the tray 1, the wedge block 23, and the sizing core 21 are all made of 45 steel material, and the jacket 22 is made of low-carbon steel, and the specific grade is 20 steel.

[0056] Embodiment 2

[0057] See Figures 2 to 6 , the embodiment of the present utility model provides a size control device for hot isostatic pressing near-net forming of annular parts, including a circular tray 1, and two layers of control mechanisms 2 with the same structure are arranged on the tray 1. The first layer of control mechanism 2 is placed on the tray 1, and the second layer of control mechanism 2 is placed on the first layer of control mechanism 2;

[0058] Each layer of control mechanism 2 includes a sizing core 21 and a jacket 22 arranged coaxially. The jacket 22 is sleeved on the outer circumference of the sizing core 21. Four wedge blocks 23 are evenly arranged between the sizing core 21 and the jacket 22 on the outer circumferential surface of the sizing core 21, and the inner surface of each wedge block 23 is adapted to the outer surface structure of the sizing core 21 so that the wedge block 23 fits with the sizing core 21;

[0059] The jacket 22 is in clearance fit with all the wedge blocks 23 evenly arranged on the outer circumferential surface of the sizing core 21.

[0060] Specifically, the outer diameter dimension of the sizing core 21 after being assembled with the four wedges 23 is smaller than the inner diameter dimension of the jacket 22, and the two are in clearance fit, with the clearance being approximately 1 mm.

[0061] As Figure 6 shown, the structure of the jacket 22 is a concentric and coaxial ring with different outer and inner diameters, forming an annular cavity. The annular cavity is a powder filling area. In the hot isostatic pressing process, under the influence of high temperature and high pressure, the jacket 22 and the powder as a whole shrink inward, and the jacket 22 has the same height as the sizing core 21.

[0062] In this embodiment, the outer diameter of each assembled jacket 22, wedge 23 and sizing core 21 is smaller than the diameter of the tray 1.

[0063] Furthermore, the sizing core 21 is in the shape of a frustum of a cone, and four wedges 23 adapted to its structure are evenly arranged on the outer peripheral surface of the frustum of a cone shape. Specifically, the angle between the side and the bottom of the frustum of a cone shape is 80°.

[0064] Furthermore, an annular groove 11 is formed on the upper surface of the tray 1. One end of each wedge 23 at the top of the tray 1 is inserted into the annular groove 11, and the other end is located at the top of the sizing core 21 and the jacket 22.

[0065] In this embodiment, the depth of the annular groove 11 is 5 mm; each wedge 23 is 5 mm higher than the sizing core 21 so that the bottom of the wedge 23 can be inserted into the annular groove 11.

[0066] Specifically, each wedge 23 is composed of a vertical plate 231 and a sector-shaped horizontal plate 232. The sector-shaped horizontal plate 232 is arranged on the top of the vertical plate 231, and the connection between the inner side surface of the vertical plate 231 and the sector-shaped horizontal plate 232 is a transitional arc surface structure. The cross-section of the connection between the outer side surface of the vertical plate 231 and the sector-shaped horizontal plate 232 is a T-shaped structure;

[0067] The bottom of the vertical plate 231 is inserted into the annular groove 11, one end of the sector-shaped horizontal plate 232 is placed on the top of the sizing core 21, and the other end is placed on the top of the jacket 22.

[0068] In this embodiment, the vertical plate 231 and the sector-shaped horizontal plate 232 are integrally formed.

[0069] Furthermore, an arc-shaped groove 2321 with a groove depth of 5 mm is formed along the radial direction on the upper surface of the sector-shaped horizontal plate 232. The groove width of the arc-shaped groove 2321 is larger than the thickness of the bottom of the vertical plate 231 so that the upper wedge 23 can be inserted into the arc-shaped groove 2321.

[0070] In this embodiment, the sizing core 21, the jacket 22 and the wedge block 23 of the second layer of the control type mechanism 2 are all placed on the upper surface of the wedge block 23 of the first layer of the control type mechanism 2, and the bottom of each wedge block 23 of the second layer of the control type mechanism 2 is inserted into the arc-shaped groove 2321 on the upper surface of the corresponding wedge block 23 of the first layer.

[0071] Specifically, in this embodiment, the central angle of the sector-shaped horizontal plate 232 is 80°, and its inner diameter is 120 mm.

[0072] Furthermore, a first connection hole 2322 is opened on the upper surface of the sector-shaped horizontal plate 232 and inside the arc-shaped groove 2321. Specifically, the first connection hole 2322 is an M12 threaded hole, and a lifting ring is installed in cooperation with the M12 threaded hole for the lifting work of the wedge block 23.

[0073] Furthermore, a second connection hole 211 for connecting a lifting ring is opened at the center of the top of the sizing core 21; four third connection holes 212 for connecting a lifting ring are evenly opened on the outer peripheral direction of the top of the sizing core 21 and located at the second connection hole 211. Specifically, the second connection hole 211 is a threaded through hole with a diameter of 100 mm; the third connection hole 212 is an M12 threaded hole with a depth of 30 mm, and a lifting ring is installed in cooperation with the threaded through hole and the M12 threaded hole respectively for the lifting work of the sizing core 21.

[0074] Furthermore, four fourth connection holes 12 are evenly opened on the outer peripheral direction of the top of the tray 1 and located at the annular groove 11. Specifically, the fourth connection hole 12 is an M12 threaded through hole.

[0075] In this embodiment, the tray 1, the wedge block 23 and the sizing core 21 are all made of 45 steel material, and the jacket 22 is made of low-carbon steel, and the specific grade is Q235 steel.

[0076] The specific implementation process of this embodiment is as follows:

[0077] Taking the manufacture of a certain mass-produced model turbine disk as an example (such as Figure 6 ), a jacket 22 with an outer diameter of 574 mm, an inner diameter of 325 mm and a wall thickness of 5 mm is selected, and a certain grade of superalloy is filled in the jacket 22.

[0078] (a) Design and processing of the control type device

[0079] For a certain mass-produced model turbine disk, according to the inner and outer diameters of the above-mentioned jacket 22, the temperature and pressure of the hot isostatic pressing process, and combined with the plasticity of 45 steel, the wedge block 23, the sizing core 21 and the tray 1 are designed, and the processing material uses 45 steel bars or plates.

[0080] (b) Installation of the control type device

[0081] During actual use, high-temperature resistant lubricant is sprayed on the surfaces of all components of the shape control device. The tray 1 is placed at the bottom of the lifting basket of the hot isostatic pressing equipment. The first layer of shape control mechanism 2 is placed on the tray 1. Specifically, the sleeve 22 and the shaping core 21 are placed on the tray 1, and four wedges 23 are evenly placed in the gap between the sleeve 22 and the shaping core 21. A metal hammer is used to strike the wedges 23 in the vertical and horizontal directions, so that the bottom of the wedges 23 is assembled in the annular groove 11 of the tray 1. Thus, all components of this shape control device are located at the same center position. Install the second layer of shape control mechanism 2 according to this installation process. The bottoms of the four wedges 23 of the second layer of shape control mechanism 2 are all located in the arc-shaped grooves 2321 on the upper surfaces of the corresponding wedges 23 of the first layer of shape control mechanism 2. Finally, the lifting basket is lifted and placed into the hot isostatic pressing equipment, and the installation of the entire shape control device is completed.

[0082] It should be noted that the shape control mechanism 2 can be provided with multiple layers as long as it meets the operation requirements, and no limitation is made here.

[0083] (c) Hot isostatic pressing process

[0084] During hot isostatic pressing, the entire device is forced to contract inward. Due to the taper fit between the wedge 23 and the shaping core 21, the shape control device can achieve self-locking fixation, avoiding the phenomenon that the wedge 23 is pushed upward due to the shrinkage of the sleeve 22.

[0085] (d) Disassembly of the shape control device

[0086] After the hot isostatic pressing is completed, first remove the second layer of shape control mechanism 2 through the lifting ring. Since there is no taper fit between the bottom of the wedge 23 of the second layer of shape control mechanism 2 and the arc-shaped groove 2321 of the wedge 23 of the first layer of shape control mechanism 2, it can be directly separated. Then remove the first layer of shape control mechanism 2 from the tray 1. Since there is no taper fit between the bottom of the wedge 23 of the first layer of shape control mechanism 2 and the annular groove 11 of the tray 1, it can be directly separated. The wedge 23, the shaping core 21, and the sleeve 22 of the first layer of shape control mechanism 2 form a whole. Use a metal hammer to strike the bottom of the wedge 23, and combine with the lifting ring to take out the wedge 23, then the three can be separated. Finally, disassemble the sleeve 22 and the formed annular part. The disassembly method of the second layer of shape control mechanism 2 is the same as that of the first layer of shape control mechanism 2.

[0087] To prove the efficacy of this embodiment, the following tests were conducted on this embodiment and the traditional hot isostatic pressing sleeve:

[0088] Table 1 Test results of the sleeve shape control of Example 2 and the traditional sleeve after HIP

[0089]

[0090]

[0091] As can be seen from Table 1, during the hot isostatic pressing process, there is a large difference in the dimensions of the traditional jacket after 22 HIP in two directions. When finish machining the turbine disk, only the circle with the minimum dimension can be taken, which results in waste of metal powder and is not conducive to near-net forming. After using the size control device for near-net forming of the annular part by hot isostatic pressing in this embodiment, the error of the jacket 22 in different directions is reduced to 1 mm - 2 mm. Compared with the traditional jacket 22 HIP, the dimensional error is reduced by 10 mm - 15 mm. Taking a certain grade of superalloy powder used in this embodiment as an example, the powder consumption is saved by 20%.

[0092] After Example 2, according to the size measurement results of the present utility model, before and after the use of the size control device in this embodiment, there is no obvious change in the size and fit degree between the wedge block 23 and the sizing core 21; there is no obvious change in the outer diameter after the wedge block 23 and the sizing core 21 are assembled. Thus, it can be seen that this size control device has repeatability in use. The present utility model has an obvious size control effect on the jacket, can significantly improve the powder utilization rate, reduce the machining amount, and lower the production cost.

[0093] The above are only specific embodiments of the present utility model, enabling those skilled in the art to understand or implement the present utility model. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present utility model.

[0094] It should be understood that the present utility model is not limited to the content already described above, and various modifications and changes can be made without departing from its scope. The scope of the present utility model is only limited by the appended claims.

Claims

1. A dimension control device for hot isostatic pressing near net shaping of annular parts, characterized in that It includes a tray (1), on which at least one layer of shape control mechanism (2) is arranged. The shape control mechanism (2) includes a shaping core (21) and a sheath (22) arranged coaxially. The sheath (22) is sleeved on the outer periphery of the shaping core (21). At least two wedge blocks (23) are evenly arranged between the shaping core (21) and the sheath (22) on the outer peripheral surface of the shaping core (21), and the inner surface of each wedge block (23) is adapted to the outer surface structure of the shaping core (21) so that the wedge block (23) fits with the shaping core (21). The sheath (22) is in clearance fit with all the wedge blocks (23) evenly arranged on the outer peripheral surface of the shaping core (21).

2. The dimension control device for hot isostatic pressing near net shaping of annular parts according to claim 1, wherein The shaping core (21) is in the shape of a frustum of a cone, and at least two wedge blocks (23) adapted to its structure are evenly arranged on the outer peripheral surface of the frustum of a cone shape.

3. The size control device for near-net forming of ring parts by hot isostatic pressing according to claim 1, characterized in that, An annular groove (11) is formed on the upper surface of the tray (1). One end of each wedge block (23) at the top of the tray (1) is inserted into the annular groove (11), and the other end is located at the top of the shaping core (21) and the sheath (22).

4. The dimension control device for near-net forming of an annular part by hot isostatic pressing according to claim 3, wherein Each wedge block (23) is composed of a vertical plate (231) and a sector-shaped horizontal plate (232). The sector-shaped horizontal plate (232) is arranged at the top of the vertical plate (231). The connection part between the inner side surface of the vertical plate (231) and the sector-shaped horizontal plate (232) is of a transition arc surface structure, and the cross-section of the connection part between the outer side surface of the vertical plate (231) and the sector-shaped horizontal plate (232) is of a T-shaped structure. The bottom of the vertical plate (231) is inserted into the annular groove (11). One end of the sector-shaped horizontal plate (232) is placed on the top of the shaping core (21), and the other end is placed on the top of the sheath (22).

5. The size control device for hot isostatic pressing near-net forming of annular parts according to claim 4, characterized in that, The vertical plate (231) and the sector-shaped horizontal plate (232) are integrally formed.

6. The dimension control device for near-net forming of an annular part by hot isostatic pressing according to claim 4, characterized in that, An arc-shaped groove (2321) is formed on the upper surface of the sector-shaped horizontal plate (232) along its radial direction so that the bottom of the upper wedge block (23) can be inserted into the arc-shaped groove (2321). The groove width of the arc-shaped groove (2321) is greater than the thickness of the bottom of the vertical plate (231).

7. The dimensional control device for hot isostatic pressing near net shaping of annular parts according to claim 6, characterized in that, A first connection hole (2322) is formed on the upper surface of the sector-shaped horizontal plate (232) inside the arc-shaped groove (2321).

8. The dimension control device for near-net forming of an annular part by hot isostatic pressing according to claim 1, characterized in that, A second connection hole (211) for connecting a lifting member is formed at the center of the top of the shaping core (21); a plurality of third connection holes (212) for connecting a lifting member are evenly formed on the top of the shaping core (21) in the peripheral direction of the second connection hole (211).

9. The size control device for near-net forming of ring parts by hot isostatic pressing according to claim 1, wherein, A plurality of fourth connection holes (12) are evenly formed on the top of the tray (1) in the peripheral direction of the annular groove (11).

10. The size control device for near-net forming of ring-shaped parts by hot isostatic pressing according to claim 1, characterized in that, The tray (1), the wedge block (23) and the shaping core (21) are all made of 45 steel material; the sheath (22) is made of low-carbon steel.

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