A compressor casing barrel forming device and method

Abstract

This invention belongs to the field of aero-engine compressor casing manufacturing technology, and discloses a compressor casing cylinder forming device and method. The device includes a male mold body, a first rotating shaft, a second rotating shaft, and a bracket. The two ends of the male mold body are rotatably connected to the two ends of the bracket via the first and second rotating shafts, respectively. The male mold body includes a core mold, a first flange pressure plate, a second flange pressure plate, and a male mold assembly. The two ends of the core mold are detachably connected to the first and second flange pressure plates, respectively, and the two flange pressure plates are detachably connected to the two rotating shafts. The male mold assembly is sleeved on the outer wall of the core mold and detachably connected. Its outer wall forming surface has several grooves along the circumferential direction. The male mold assembly includes multiple male mold units along the axial direction of the core mold, and each male mold unit includes multiple arc-shaped blocks along the circumferential direction of the core mold. This invention facilitates demolding and simultaneously meets the requirements of convenient installation and integral forming of the compressor casing cylinder, improving the positioning accuracy of the internal reinforcing ribs of the cylinder.

Description

Technical Field

[0001] This invention belongs to the field of aero-engine compressor casing manufacturing technology, and specifically relates to a compressor casing forming device and method. Background Technology

[0002] The compressor casing of an aero-engine is the core containment component, housing high-speed rotating compressor blades. During actual engine service, factors such as foreign object impacts and fatigue failure pose a risk of blade breakage and detachment. If high-speed blade fragments penetrate the casing, they can threaten external piping, accessories, and the overall operational safety of the engine. Therefore, in addition to meeting rigidity, strength, and lightweight requirements, the compressor casing must possess excellent blade containment capabilities to maintain structural integrity after a blade detachment impact, preventing further damage from high-speed debris.

[0003] Composite materials, with their significant advantages of high specific strength and high specific modulus, are increasingly being applied to the development of compressor casings. Most existing conventional composite compressor casings do not have internal reinforcing ribs. The corresponding molding male mold can be assembled using simple tooling that combines the casing and flange, resulting in a simple tooling structure and low processing difficulty. However, the casing without internal reinforcing ribs has limited impact and tear resistance, and its containment and protection performance for broken blades is insufficient.

[0004] To improve containment performance, circumferential inner reinforcing ribs are added to the inner side of the casing. These casings with inner reinforcing ribs have a near-cylindrical configuration with flanged edges. The inner circumferential reinforcing ribs also need to be assembled and matched with the internal components of the casing, placing high demands on the positional and dimensional accuracy of the ribs. Current technology involves molding the casing separately and then performing a secondary molding process on the inner surface to prepare the reinforcing ribs. However, the internal cavity of the compressor casing is small, limiting the operational space for the secondary molding operation. This not only makes construction difficult but also easily leads to inaccurate positioning and displacement of the circumferential reinforcing ribs, making it difficult to guarantee the assembly accuracy of the reinforcing ribs and the overall molding quality of the component.

[0005] In summary, existing technologies lack an effective solution for achieving integral molding of a compressor casing with internal reinforcing ribs made of composite materials, while ensuring the positioning accuracy of the reinforcing ribs. Summary of the Invention

[0006] To address the above problems, the present invention provides a compressor casing forming device, comprising a male mold body, a first rotating shaft, a second rotating shaft, and a bracket; One end of the male mold body is rotatably connected to one end of the bracket via a first rotating shaft, and the other end of the male mold body is rotatably connected to the other end of the bracket via a second rotating shaft. The male mold body includes a core mold, a first flange plate, a second flange plate, and a male mold assembly. One end of the core mold is detachably connected to the first flange plate, and the other end of the core mold is detachably connected to the second flange plate. The first flange plate is detachably connected to the first rotating shaft, and the second flange plate is detachably connected to the second rotating shaft. The male mold assembly is fitted onto the outer wall of the core mold and is detachably connected to the core mold. The outer wall forming surface of the male mold assembly has several grooves along the circumferential direction. The male mold assembly includes multiple male mold units along the axial direction of the core mold, and each male mold unit includes multiple arc-shaped blocks along the circumferential direction of the core mold.

[0007] Furthermore, a first clamp and a second clamp are respectively provided at the top two ends of the bracket. One end of the male mold body is rotatably connected to the first clamp via a first rotating shaft, and the other end of the male mold body is rotatably connected to the second clamp via a second rotating shaft.

[0008] Furthermore, the first and second rotation axes are coaxially arranged.

[0009] Furthermore, multiple male mold units have the same length, while multiple arc blocks have different arc lengths.

[0010] Furthermore, it also includes a first pressure plate and a second pressure plate. The first pressure plate is fixedly connected to the first rotating shaft and is located on the side of the first clamp facing away from the male mold body. The second pressure plate is fixedly connected to the second rotating shaft and is located on the side of the second clamp facing away from the male mold body.

[0011] Furthermore, it also includes a rotary handle, which is eccentrically positioned on the first pressure plate.

[0012] Furthermore, it includes a frame-type base and two support frames, wherein the two support frames are fixedly installed at both ends of the base, and the two support frames are fixedly connected in the middle by a tie rod. The support frames are A-shaped, and the top of the two support frames are respectively provided with a first clamp and a second clamp.

[0013] Furthermore, it also includes a first connecting plate and a second connecting plate; The first connecting plate is fixedly connected to the first rotating shaft at its center, and the area of ​​the first connecting part near its outer periphery is detachably connected to the first flange pressure plate; the second connecting plate is fixedly connected to the second rotating shaft at its center, and the area of ​​the second connecting part near its outer periphery is detachably connected to the second flange pressure plate.

[0014] Furthermore, the core mold is a cylindrical structure with a draft angle between 1° and 5°.

[0015] Furthermore, the end of the mandrel with a larger outer diameter is detachably connected to the first flange pressure plate by screws, and the end of the mandrel with a smaller outer diameter is detachably connected to the second flange pressure plate by screws.

[0016] Furthermore, each arc-shaped block is positioned with the core mold by multiple pins and is detachably connected to the core mold by multiple screws.

[0017] The present invention also provides a method for forming a compressor casing, based on the above-mentioned compressor casing forming device, comprising the following steps: A sheet of prepreg is laid on the outer molding surface of the male mold assembly and pre-pressed; then, narrow strips of prepreg are filled into the grooves of the male mold assembly according to the designed number of layers. Prepreg is laid on the male mold assembly layer by layer according to the design, and the lay-up layer is kept on top by rotating the male mold body. After the paving is completed, vacuum bag film is used to draw a vacuum. The two ends of the vacuum bag film are respectively placed in the middle area of ​​the first rotating shaft and the second rotating shaft. After the vacuum pressure holding operation is correct, the first rotating shaft, the second rotating shaft and the male mold body are removed from the bracket and hot-pressed for curing. After hot pressing and curing, the vacuum bag mold is removed, and then the first rotating shaft, the second rotating shaft, the second flange pressure plate, and the first flange pressure plate are disassembled in sequence. Then the core mold is extracted, and the arc block is removed to obtain the integrally formed compressor casing body with inner reinforcing ribs.

[0018] The beneficial effects of this invention are: 1. In the molding device of the present invention, the male mold body is rotatably mounted on the bracket at both ends of the first rotating shaft and the second rotating shaft. The male mold body can rotate relative to the bracket as a whole. During the layup operation, the male mold body can be flexibly rotated to rotate different circumferential positions to a position that is easy to operate, which facilitates the laying of prepreg in various parts of the cylinder, improves the accessibility of the operation, and reduces the difficulty of layup construction.

[0019] 2. The mandrel of the present invention is detachably assembled to the first flange plate and the second flange plate at both ends, respectively. The flange plates are then detachably connected to the two rotating shafts, facilitating the overall disassembly, maintenance, and replacement of parts of the male mold body. The male mold assembly is sleeved on the outer wall of the mandrel and is detachably assembled with the mandrel. The outer wall forming surface of the male mold assembly is provided with a circumferential groove, realizing the integral forming of the compressor casing body containing internal reinforcing ribs, eliminating the need for subsequent secondary forming of reinforcing ribs and ensuring the accuracy of the reinforcing rib forming position.

[0020] 3. The male mold assembly of the present invention consists of multiple male mold units arranged axially, and each male mold unit is further composed of multiple circumferential arc-shaped blocks spliced ​​together. Adopting a modular assembly structure, it allows for segmented demolding after curing, avoiding the problem of the integral male mold being difficult to remove from the inner cavity of the cylinder. This reduces the demolding difficulty of the composite material cylinder with internal reinforcing ribs, minimizes impact damage to the inner wall and internal reinforcing ribs of the casing during demolding, and effectively ensures the molding quality of the compressor casing and internal reinforcing ribs.

[0021] Other features and advantages of the invention will be set forth in the following description, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description and the drawings. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 A schematic diagram of a compressor casing forming apparatus according to an embodiment of the present invention is shown; Figure 2 A schematic diagram of the structure of the male mold body according to an embodiment of the present invention is shown; Figure 3 A schematic diagram of the structure of the first flange pressure plate according to an embodiment of the present invention is shown; Figure 4 It shows along Figure 3 Sectional view of line AA in the middle; Figure 5 It shows along Figure 3 A cross-sectional view along the BB line.

[0024] In the diagram: 1. Male mold body; 2. First rotating shaft; 3. Second rotating shaft; 4. Bracket; 5. First clamp; 6. Second clamp; 101. Core mold; 102. First flange pressure plate; 103. Second flange pressure plate; 104. Male mold assembly; 1041. Male mold unit; 1042. Arc block; 7. First pressure plate; 8. Second pressure plate; 9. Rotating handle; 41. Base; 42. Support frame; 43. Tie rod; 10. First connecting plate; 11. Pin; 12. Screw. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] It should be noted that the terms "first," "second," etc., used in this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this application described herein.

[0027] This invention provides a compressor casing forming device and method that, while facilitating demolding, simultaneously meets the requirements of convenient installation and integral forming of the compressor casing, effectively improving the positioning accuracy of the internal reinforcing ribs.

[0028] like Figure 1 As shown, a compressor casing forming device includes a male mold body 1, a first rotating shaft 2, a second rotating shaft 3, and a bracket 4.

[0029] One end of the male mold body 1 is rotatably connected to one end of the bracket 4 via a first rotating shaft 2, and the other end of the male mold body 1 is rotatably connected to the other end of the bracket 4 via a second rotating shaft 3. For example, the first rotating shaft 2 and the second rotating shaft 3 are coaxially arranged.

[0030] In this embodiment of the invention, considering that the compressor casing is a near-cylindrical structure with flanges and has several circumferential reinforcing ribs inside, and considering the forming process of the casing, the mold of the forming device adopts a male mold.

[0031] like Figure 1 As shown, for example, the top two ends of the bracket 4 are respectively provided with a first clamp 5 and a second clamp 6. One end of the male mold body 1 is rotatably connected to the first clamp 5 through the first rotating shaft 2, and the other end of the male mold body 1 is rotatably connected to the second clamp 6 through the second rotating shaft 3.

[0032] In this embodiment of the invention, the two ends of the male mold body 1 are respectively rotated with the first clamp 5 and the second clamp 6 on the bracket 4 through the rotating shaft. The male mold body 1 can rotate around the common axis of rotation of the two rotating shafts relative to the bracket 4. During molding and laying, the male mold body 1 can be rotated, which facilitates the layup operation of each part. During hot pressing and curing, the male mold body 1 can be removed from the bracket 4, which reduces the difficulty of the layup operation and makes the operation convenient.

[0033] like Figure 4 As shown, the male mold body 1 includes a core mold 101, a first flange pressure plate 102, a second flange pressure plate 103, and a male mold assembly 104. One end of the core mold 101 is detachably connected to the first flange pressure plate 102, and the other end of the core mold 101 is detachably connected to the second flange pressure plate 103. The first flange pressure plate 102 is detachably connected to the first rotating shaft 2, and the second flange pressure plate 103 is detachably connected to the second rotating shaft 3.

[0034] The male mold assembly 104 is sleeved on the outer wall of the core mold 101 and is detachably connected to the core mold 101, such as... Figure 2 and Figure 4 As shown, the outer wall forming surface of the male mold assembly 104 is provided with a number of grooves along the circumferential direction. The grooves are used to form the internal reinforcing ribs of the cylinder. In this embodiment of the invention, the grooves are provided on the outer wall forming surface of the male mold assembly 104 to form the reinforcing ribs. Since the position, depth and number of the grooves can be set as needed and precisely machined during mold processing, the positioning accuracy of the internal reinforcing ribs of the cylinder can be effectively improved.

[0035] like Figure 4 As shown, the male mold assembly 104 includes a plurality of male mold units 1041 along the axial direction of the core mold 101, such as... Figure 5 As shown, each male mold unit 1041 includes a plurality of arc-shaped blocks 1042 along the circumference of the core mold 101. For example, the male mold assembly 104 can be divided into two male mold units 1041 of equal length along the axial direction of the core mold 101, and each male mold unit 1041 includes eight arc-shaped blocks 1042 of different arc lengths along the circumference of the core mold 101.

[0036] The molding apparatus of this invention takes into account the demolding operability after the product is molded as a whole. Since there are several circumferential grooves on the outer wall molding surface of the male mold assembly 104, it would be impossible to demold if it is designed as a whole. Therefore, the male mold assembly 104 is designed as a block structure, which is divided into multiple male mold units 1041 in the axial direction and multiple arc blocks 1042 in the circumferential direction.

[0037] like Figure 1 As shown, for example, the compressor casing forming device further includes a first pressure plate 7 and a second pressure plate 8. The first pressure plate 7 is fixedly connected to the first rotating shaft 2 and is located on the side of the first clamp 5 facing away from the male mold body 1. The second pressure plate 8 is fixedly connected to the second rotating shaft 3 and is located on the side of the second clamp 6 facing away from the male mold body 1. The first pressure plate 7 and the second pressure plate 8 achieve axial positioning of the rotating shaft and the clamp, preventing the rotating shaft from coming out of the clamp.

[0038] For example, the compressor casing forming device also includes a rotating handle 9, which is eccentrically set on the first pressure plate 7. Under the action of the rotating handle 9, the male mold body 1 can be rotated, which facilitates the layering operation of each part.

[0039] For example, the bracket 4 serves as the supporting base for the molding device, including a bottom frame-type base 41 and two left and right support frames 42. The two support frames 42 are symmetrically fixed at the left and right ends of the base 41, and the middle of the two support frames 42 is fixedly connected by a tie rod 43 to form a stable support structure, while leaving space for the installation and rotation of the male mold body 1. The support frame 42 is an A-shaped triangular support structure. The two support frames 42 are raised to form a high installation position, and the top of the two support frames 42 is respectively equipped with a first clamp 5 and a second clamp 6.

[0040] For example, the core mold 101 is a cylindrical structure with a draft angle, that is, the outer wall of the core mold 101 is conical, the draft angle is between 1° and 5°, and the core mold 101 is made of one of Q235, 45# and P20.

[0041] For example, the compressor casing forming device also includes a first connecting plate 10 and a second connecting plate. The middle part of the first connecting plate 10 is fixedly connected to the first rotating shaft 2, and the area of ​​the first connecting part near the outer periphery is detachably connected to the first flange pressure plate 102. The middle part of the second connecting plate is fixedly connected to the second rotating shaft 3, and the part of the second connecting part near the outer periphery is detachably connected to the second flange pressure plate 103.

[0042] For example, both the first connecting plate 10 and the second connecting plate have a first through hole in the middle. After the first rotating shaft 2 is inserted into and positioned by the first through hole in the middle of the first connecting plate 10, the first rotating shaft 2 can be fixed to the first connecting plate 10 by welding. After the second rotating shaft 3 is inserted into and positioned by the first through hole in the middle of the second connecting plate, the second rotating shaft 3 can be fixed to the second connecting plate by welding.

[0043] The first connecting plate 10 and the second connecting plate have multiple second through holes arranged circumferentially in the area near their outer periphery, such as... Figure 3 As shown, the first flange pressure plate 102 and the second flange pressure plate 103 are both provided with a first internal thread hole at the position corresponding to the second through hole. The screw 12 passes through the second through hole and is threaded to the first internal thread hole, thereby detachably connecting the first connecting plate 10 to the first flange pressure plate 102 and detachably connecting the second connecting plate to the second flange pressure plate 103.

[0044] like Figure 4 As shown, for example, the end of the core mold 101 with a larger outer diameter is detachably connected to the first flange pressure plate 102 by screws 12. For example, the wall of the end of the core mold 101 with a larger outer diameter is provided with a plurality of first threaded blind holes along the circumferential direction, and each first threaded blind hole extends axially along the wall of the core mold 101, such as... Figure 3 As shown, the first flange pressure plate 102 is provided with a third through hole at the position corresponding to each first threaded blind hole, and the cylindrical head screw 12 passes through the third through hole and connects to the first internal threaded blind hole.

[0045] The end of the core mold 101 with a smaller outer diameter is detachably connected to the second flange pressure plate 103 by screws 12; for example, the wall of the end of the core mold 101 with a smaller outer diameter is provided with a plurality of second thread blind holes in the circumferential direction, each second thread blind hole extending axially along the wall of the core mold 101, and the second flange pressure plate 103 is provided with a fourth through hole at a position corresponding to each second thread blind hole, and the screws 12 pass through the fourth through holes and connect to the second internal thread blind holes.

[0046] like Figure 4 As shown, for example, each arc-shaped block 1042 is positioned with the core mold 101 by multiple pins 11 and is detachably connected to the core mold 101 by multiple screws 12. For example, the wall of the core mold 101 is provided with multiple positioning holes and several screw 12 mounting holes at each arc-shaped block 1042. The side wall of the arc-shaped block 1042 that fits with the core mold 101 is provided with positioning blind holes at positions corresponding to the positioning holes and threaded blind holes at positions corresponding to the screw 12 mounting holes. The pins 11 pass through the positioning holes and engage with the positioning blind holes to achieve positioning of the arc-shaped block 1042 and the core mold 101. The screws 12 pass through the screw 12 mounting holes and connect with the threaded blind holes to achieve detachable connection between the arc-shaped block 1042 and the core mold 101.

[0047] Based on the above-described compressor casing forming apparatus, this embodiment of the invention also provides a compressor casing forming method, comprising the following steps: S1. Assemble the compressor casing forming device according to the above connection method.

[0048] S2. Prepreg preparation: Cut prepreg to the appropriate size according to the layup process and cutting diagram.

[0049] S3. Pre-formed circumferential reinforcing ribs: A sheet of prepreg is laid on the outer wall forming surface of the male mold assembly 104 and pre-pressed; then, according to the design number of layers, narrow strips of prepreg are filled into the annular grooves of the male mold assembly 104, and pre-pressed at least once every 3 layers.

[0050] S4. Then, according to the design, prepreg is laid layer by layer on the male mold assembly 104. The laying layer is kept on top by rotating the male mold body 1 to facilitate the laying operation.

[0051] S5. After the overall paving is completed, vacuum bag film is used to draw a vacuum. The two ends of the vacuum bag film are respectively placed in the middle area of ​​the first rotating shaft 2 and the second rotating shaft 3. After the vacuum pressure holding operation is correct, the first rotating shaft 2, the second rotating shaft 3 and the male mold body 1 are removed from the bracket 4 and placed on the base 41. Then, they are put into the autoclave for curing.

[0052] S6. Demolding: After hot pressing and curing, first remove the vacuum bag mold, then disassemble the first rotating shaft 2, the second rotating shaft 3, the second flange pressure plate 103, and the first flange pressure plate 102 in sequence. Then, pull out the core mold 101 in the direction of the draft angle, and then use a rubber mallet to remove the arc block 1042 in sequence. Finally, the composite material compressor casing body with inner reinforcing ribs is obtained as a whole.

[0053] The molding apparatus and method of this invention enable the integral molding of a composite compressor casing body with internal reinforcing ribs, while simultaneously satisfying the requirements of layup convenience and demolding capability. It can effectively improve the positioning accuracy of the circumferential reinforcing ribs on the inner side of the casing and improve the molding quality of the composite compressor casing.

[0054] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A compressor casing forming device, characterized in that, It includes a male mold body (1), a first rotating shaft (2), a second rotating shaft (3), and a bracket (4); Wherein, one end of the male mold body (1) is rotatably connected to one end of the bracket (4) through the first rotating shaft (2), and the other end of the male mold body (1) is rotatably connected to the other end of the bracket (4) through the second rotating shaft (3); The male mold body (1) includes a core mold (101), a first flange plate (102), a second flange plate (103), and a male mold assembly (104). One end of the core mold (101) is detachably connected to the first flange plate (102), and the other end of the core mold (101) is detachably connected to the second flange plate (103). The first flange plate (102) is detachably connected to the first rotating shaft (2), and the second flange plate (103) is detachably connected to the second rotating shaft (3). The male mold assembly (104) is sleeved on the outer wall of the core mold (101) and is detachably connected to the core mold (101). The outer wall forming surface of the male mold assembly (104) is provided with a plurality of grooves along the circumferential direction. The male mold assembly (104) includes a plurality of male mold units (1041) along the axial direction of the core mold (101). Each male mold unit (1041) includes a plurality of arc blocks (1042) along the circumferential direction of the core mold (101).

2. The compressor casing forming apparatus according to claim 1, characterized in that, The bracket (4) has a first clamp (5) and a second clamp (6) at its top two ends respectively. One end of the male mold body (1) is rotatably connected to the first clamp (5) through the first rotating shaft (2), and the other end of the male mold body (1) is rotatably connected to the second clamp (6) through the second rotating shaft (3).

3. The compressor casing forming apparatus according to claim 1, characterized in that, The first rotating shaft (2) and the second rotating shaft (3) are coaxially arranged.

4. The compressor casing forming apparatus according to claim 1, characterized in that, The multiple male mold units (1041) have the same length, and the multiple arc blocks (1042) have different arc lengths.

5. The compressor casing forming apparatus according to claim 2, characterized in that, It also includes a first pressure plate (7) and a second pressure plate (8). The first pressure plate (7) is fixedly connected to the first rotating shaft (2). The first pressure plate (7) is located on the side of the first clamp (5) facing away from the male mold body (1). The second pressure plate (8) is fixedly connected to the second rotating shaft (3). The second pressure plate (8) is located on the side of the second clamp (6) facing away from the male mold body (1).

6. The compressor casing forming apparatus according to claim 5, characterized in that, It also includes a rotating handle (9), which is eccentrically disposed on the first pressure plate (7).

7. The compressor casing forming apparatus according to claim 2, characterized in that, It includes a frame base (41) and two support frames (42), wherein the two support frames (42) are fixedly installed at both ends of the base (41), and the two support frames (42) are fixedly connected in the middle by a tie rod (43). The support frames (42) are A-shaped, and the top of the two support frames (42) are respectively provided with the first clamp (5) and the second clamp (6).

8. The compressor casing forming apparatus according to claim 1, characterized in that, It also includes a first connecting plate (10) and a second connecting plate; The first connecting plate (10) is fixedly connected to the first rotating shaft (2) in the middle, and the area of ​​the first connecting part near the outer periphery is detachably connected to the first flange pressure plate (102); the second connecting plate is fixedly connected to the second rotating shaft (3) in the middle, and the area of ​​the second connecting part near the outer periphery is detachably connected to the second flange pressure plate (103).

9. The compressor casing forming apparatus according to any one of claims 1-8, characterized in that, The core mold (101) is a cylindrical structure with a draft angle between 1° and 5°.

10. The compressor casing forming apparatus according to claim 9, characterized in that, The larger end of the core mold (101) is detachably connected to the first flange pressure plate (102) by a screw (12), and the smaller end of the core mold (101) is detachably connected to the second flange pressure plate (103) by a screw (12).

11. The compressor casing forming apparatus according to claim 1, characterized in that, Each of the arcuate blocks (1042) is positioned to the core mold (101) by a plurality of pins (11) and is detachably connected to the core mold (101) by a plurality of screws (12).

12. A method for forming a compressor casing, characterized in that, The compressor casing forming apparatus according to any one of claims 1-11 includes the following steps: A sheet of prepreg is laid on the outer molding surface of the male mold assembly (104) and pre-pressed; then, narrow strips of prepreg are filled into the grooves of the male mold assembly (104) according to the design number of layers. Prepreg is laid layer by layer on the male mold assembly (104) according to the design, and the lay-up layer is kept on top by rotating the male mold body (1); After the paving is completed, vacuum bag film is used to draw a vacuum. The two ends of the vacuum bag mold are respectively placed in the middle area of ​​the first rotating shaft (2) and the second rotating shaft (3). After the vacuum pressure holding operation is correct, the first rotating shaft (2), the second rotating shaft (3) together with the male mold body (1) are removed from the bracket (4) and hot-pressed for curing. After hot pressing and curing, the vacuum bag mold is removed, and then the first rotating shaft (2), the second rotating shaft (3), the second flange pressure plate (103), and the first flange pressure plate (102) are disassembled in sequence. Then the core mold (101) is pulled out, and the arc block (1042) is removed to obtain the compressor casing body with inner reinforcing ribs that is integrally formed.

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