A device for improving the bond strength of a CMC material workpiece

Abstract

This invention discloses a device for improving the bonding strength of CMC material workpieces, comprising a machine base and a boundary-breaking grouting device. An inner cylinder is mounted on the machine base, with several through holes. An outer cylinder is placed on the machine base, and the workpiece is located between the outer and inner cylinders. The outer wall of the workpiece contacts the outer cylinder, while a gap exists between the inner wall of the workpiece and the inner cylinder. A furnace body is mounted on the machine base, and a heating device is installed inside the furnace body. The furnace body comprises two half-furnace bodies, and two half-furnace body drive mechanisms are mounted on the machine base. Each half-furnace body is connected to one half-furnace body drive mechanism. When the two half-furnace bodies are separated, the outer cylinder and the workpiece can be fitted over the inner cylinder. When the two half-furnace bodies are closed, the heating device can heat the workpiece. The boundary-breaking grouting device can perform boundary-breaking grouting on the workpiece through the through holes in the inner cylinder. This device can solve the technical problems of insufficient interlayer bonding strength, uneven density distribution, and easy delamination or voids in existing ceramic matrix composite workpieces during the molding process.

Description

Technical Field

[0001] This invention relates to the field of ceramic matrix composite material processing equipment, specifically to a device for improving the bonding force of CMC material workpieces. Background Technology

[0002] Ceramic matrix composites (CMCs) are widely used in aerospace, special equipment, and high-temperature structural components due to their high specific strength, high specific modulus, high temperature resistance, wear resistance, and good thermal shock resistance. However, internal bonding issues exist during the manufacturing process.

[0003] Existing CMC material molding technologies generally suffer from the following prominent shortcomings;

[0004] 1. The laminated fiber cloth has insufficient bonding strength and is very easy to separate after molding.

[0005] In traditional injection molding, short fibers are prone to drifting, randomization, or lateral accumulation during the flow of slurry, resulting in insufficient fiber content or severe accumulation in some areas, and a decrease in the mechanical properties of the finished product.

[0006] 2. Uneven density distribution and poor mechanical curves.

[0007] When forming irregularly shaped sections (such as shrinkage sections and expansion sections), the slurry flow channels are not smooth, and delamination, inclusions or voids are easily generated between the interfaces, affecting the overall density of the material. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a device for enhancing the bonding force of CMC material workpieces, aiming to solve the technical problems of insufficient interlayer bonding force, uneven density distribution, and easy delamination or voids in existing ceramic matrix composite workpieces during the molding process.

[0009] A device for enhancing the bonding strength of CMC material workpieces includes a machine base and a boundary-breaking grouting device. An inner cylinder is mounted on the machine base, and several through holes are formed in the inner cylinder. An outer cylinder is placed on the machine base, and the workpiece is located between the outer cylinder and the inner cylinder. The outer wall of the workpiece is in contact with the outer cylinder, and a gap exists between the inner wall of the workpiece and the inner cylinder.

[0010] A furnace body is installed on the machine base, and a heating device is installed inside the furnace body. The furnace body includes two half furnace bodies. Two half furnace body drive mechanisms are installed on the machine base. Each half furnace body is connected to a half furnace body drive mechanism. When the two half furnace bodies are separated, the outer cylinder and the workpiece can be fitted outside the inner cylinder. When the two half furnace bodies are closed, the heating device can heat the workpiece.

[0011] The grouting device can perform grouting through the through holes on the inner cylinder to break the pores of the workpiece.

[0012] Preferably, the boundary-breaking grouting device includes a base plate, a base plate lifting mechanism, a motor, a motor lifting mechanism, a rotating plate, multiple sliding bars, multiple main pipes, and multiple metering pumps.

[0013] The substrate lifting mechanism is located above the machine platform and is connected to the substrate. It is used to drive the substrate to move up and down. The substrate is ring-shaped.

[0014] A motor lifting mechanism is provided on the base plate. The motor lifting mechanism is connected to the motor and can drive the motor to move up and down. A rotating plate is connected to the rotating shaft of the motor. The rotating plate is located inside the base plate. Multiple arc-shaped grooves are opened on the rotating plate. The two ends of the arc-shaped grooves are respectively located at different radial positions of the rotating plate.

[0015] Multiple sliding bars are distributed circumferentially along the axis of the substrate. The sliding bars can move through the substrate and can move radially along the substrate. Through holes are provided on the sliding bars.

[0016] Multiple main pipes are distributed circumferentially along the axis of the substrate. The top of the main pipe is connected to a guide pipe. The main pipe, arc groove and sliding bar correspond one to one. The guide pipe moves through the arc groove and through hole. Two limiting rings are connected to the guide pipe. The two limiting rings contact the top wall and bottom wall of the rotating plate respectively. The rotating shaft of the motor rotates, which can drive the rotating plate to rotate, thereby driving the guide pipe, main pipe and sliding bar to move radially along the substrate.

[0017] At least one longitudinally distributed boundary-breaking grouting unit is installed on the main pipeline. The boundary-breaking grouting unit includes a boundary-breaking cone and a grouting pipe assembly located below the boundary-breaking cone.

[0018] The boundary breaking cone is fixed to the main pipeline, and a pressure sensor is installed on the boundary breaking cone.

[0019] The grouting pipe assembly is fixed to the main pipeline. Each grouting pipe assembly is connected to a metering pump through a grouting hose. The grouting pipe assembly has elastic expansion and contraction capabilities.

[0020] Preferably, the grouting pipe assembly includes an outer pipe, an inner pipe, and a spring. The inner pipe is slidably connected to the inner wall of the outer pipe. A spring mounting plate is sleeved on the inner pipe. The two ends of the spring are respectively connected to the spring mounting plate and the main pipe. The grouting hose is connected to the outer pipe.

[0021] Preferably, the end of the inner tube is connected to a grouting head.

[0022] Preferably, the multiple main pipes are evenly distributed circumferentially along the axis of the substrate.

[0023] Preferably, the system further includes a motor mounting platform, on which a plurality of guide posts are provided, the guide posts movably passing through the motor mounting platform, and the motor is mounted on the motor mounting platform.

[0024] Preferably, when the two half-furnace bodies are joined together, the heating device is assembled into a ring.

[0025] Preferably, a fixed shaft is fixed on the machine base, and the inner cylinder is fitted onto the fixed shaft.

[0026] Preferably, the fixed shaft is fitted with a bearing plate, and both the workpiece and the outer cylinder are placed on the bearing plate.

[0027] Preferably, the support plate has an annular positioning groove, and the outer cylinder is placed in the annular positioning groove.

[0028] The beneficial effects of this invention are reflected in:

[0029] This invention, by setting up a boundary-breaking grouting device, enables the workpiece to be perforated first under heating conditions, and then quantitatively grout is injected into the perforated holes. This effectively solves the problems of fiber drift, accumulation, and uneven density distribution in the traditional grouting molding process, and significantly improves the bonding force between layers of the ceramic matrix composite workpiece. The coordinated movement design of the boundary-breaking cone and the grouting pipe assembly ensures that the boundary-breaking and grouting processes do not interfere with each other, avoiding secondary damage to the workpiece. Combined with a heating device with independent temperature control in multiple areas, it can perform differentiated heating according to the performance requirements of different parts of the workpiece, further optimizing the penetration effect of the grout and improving the overall density and mechanical properties of the workpiece. Attached Figure Description

[0030] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the accompanying drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0031] Figure 1 This is a partial cross-sectional schematic diagram of the overall structure of the present invention;

[0032] Figure 2 This is a schematic diagram of the overall bottom structure of the boundary-breaking grouting device in this invention;

[0033] Figure 3 This is a schematic diagram of the overall top structure of the boundary-breaking grouting device in this invention;

[0034] Figure 4 for Figure 3 A schematic diagram showing the structure after the middle substrate and motor have been removed;

[0035] Figure 5 This is a schematic diagram of the grouting pipe assembly in the invention.

[0036] In the attached diagram, 1-machine base, 2-bearing plate, 3-fixed shaft, 4-inner cylinder, 5-outer cylinder, 6-workpiece, 7-furnace body, 8-base plate, 9-motor, 10-rotating plate, 11-arc groove, 12-sliding bar, 13-main pipe, 14-breaking cone, 15-pressure sensor, 16-grouting pipe assembly, 17-guide pipe, 18-through hole, 19-motor mounting platform, 20-guide column, 161-outer pipe, 162-inner pipe, 163-spring, 164-spring mounting plate, 165-grouting head. Detailed Implementation

[0037] The embodiments of the technical solution of the present invention will now be described in detail with reference to the accompanying drawings. These embodiments are merely illustrative of the technical solution of the present invention and are therefore intended to limit the scope of protection of the present invention.

[0038] It should be noted that, unless otherwise stated, the technical or scientific terms used in this application should have the ordinary meaning as understood by one of ordinary skill in the art to which this invention pertains.

[0039] Example 1

[0040] like Figure 1 As shown, this embodiment provides a device for improving the bonding force of CMC material workpieces, including a machine base 1 and a boundary-breaking grouting device. An inner cylinder 4 is installed on the machine base 1, and several through holes 18 are opened on the inner cylinder 4. An outer cylinder 5 is placed on the machine base 1, and a workpiece 6 is located between the outer cylinder 5 and the inner cylinder 4. The outer wall of the workpiece 6 is in contact with the outer cylinder 5, and there is a gap between the inner wall of the workpiece 6 and the inner cylinder 4.

[0041] A furnace body 7 is provided on the machine base 1, and a heating device is provided inside the furnace body 7. The furnace body 7 includes two half furnace bodies. Two half furnace body driving mechanisms are provided on the machine base 1. Each half furnace body is connected to a half furnace body driving mechanism. When the two half furnace bodies are separated, the outer cylinder 5 and the workpiece 6 can be sleeved on the inner cylinder 4. When the two half furnace bodies are closed, the heating device can heat the workpiece 6.

[0042] The grouting device can perform grouting through the through hole 18 on the inner cylinder 4 to break the hole in the workpiece 6.

[0043] Specifically, a fixed shaft 3 is fixed on the machine base 1, and the inner cylinder 4 is fitted onto the fixed shaft 3.

[0044] Specifically, the fixed shaft 3 is fitted with a bearing plate 2, and the workpiece 6 and the outer cylinder 5 are both placed on the bearing plate 2.

[0045] Specifically, the bearing plate 2 has an annular positioning groove, and the outer cylinder 5 is placed in the annular positioning groove.

[0046] The working principle is as follows: A fixed shaft 3 is set on the machine base 1 for mounting the inner cylinder 4. A bearing plate 2 is mounted on the fixed shaft 3 for placing the workpiece 6 and the outer cylinder 5. An annular positioning groove is provided on the bearing plate 2 for positioning the outer cylinder 5.

[0047] In use, the two half-furnace body drive mechanisms separate the two half-furnace bodies, placing the workpiece 6 inside the outer cylinder 5. Then, the outer cylinder 5 and workpiece 6 are placed on the support plate 2, and the two half-furnace bodies are closed. A boundary-breaking grouting device is used to grout the workpiece 6. After grouting, the workpiece 6 is heated by a heating device. The heating device primarily uses industrial frequency heating, supplemented by medium frequency heating, to increase the permeability of the base material, effectively improving the bonding strength between the layers of the CMC workpiece 6 composite material.

[0048] The slurry is mainly a mixture of ordinary slurry and carbon nanotubes.

[0049] Specifically, when the two half-furnaces are joined together, the heating device is assembled into a ring to achieve uniform heating of the workpiece in six circumferences. The heating device uses resistance heating.

[0050] The heating device can be divided into five heating units in the longitudinal direction. Each heating unit is equipped with a temperature detection unit, which includes four temperature sensors to detect the actual temperature of the heating unit.

[0051] The heating unit has a heating temperature range of 80 degrees to 350 degrees.

[0052] By setting up multiple heating units, each heating unit can heat independently, and multiple heating units form multiple heating zones. The heating temperature of different heating zones can be controlled according to the hardness and strength requirements of each zone of the workpiece 6, so as to meet the requirements of different heating processes.

[0053] Example 2

[0054] This embodiment further defines the boundary-breaking grouting device based on embodiment 1. The boundary-breaking grouting device in this embodiment includes a base plate 8, a base plate lifting mechanism, a motor 9, a motor lifting mechanism, a rotating plate 10, multiple sliding bars 12, multiple main pipes 13, and multiple metering pumps.

[0055] The substrate lifting mechanism is located above the machine base 1 and is connected to the substrate 8. It is used to drive the substrate 8 to move up and down. The substrate 8 is ring-shaped.

[0056] A motor lifting mechanism is provided on the substrate. The motor lifting mechanism is connected to the motor 9 and can drive the motor 9 to move up and down. A rotating plate 10 is connected to the rotating shaft of the motor 9. The rotating plate 10 is located inside the substrate 8. Multiple arc-shaped grooves 11 are opened on the rotating plate 10. The two ends of the arc-shaped grooves 11 are respectively located at different radial positions of the rotating plate 10.

[0057] Multiple sliding bars 12 are distributed circumferentially along the axis of the substrate 8. The sliding bars 12 can move through the substrate 8 and can move radially along the substrate 8. Through holes are provided on the sliding bars 12.

[0058] Multiple main pipes 13 are distributed circumferentially along the axis of the substrate 8. The top of the main pipe 13 is connected to a guide pipe 17. The main pipe 13, the arc groove 11 and the sliding bar 12 correspond one-to-one. The guide pipe 17 movably passes through the arc groove 11 and the through hole. Two limiting rings are connected to the guide pipe 17. The two limiting rings contact the top wall and bottom wall of the rotating plate 10 respectively. When the rotating shaft of the motor 9 rotates, it can drive the rotating plate 10 to rotate, thereby driving the guide pipe 17, the main pipe 13 and the sliding bar 12 to move radially along the substrate 8.

[0059] At least one longitudinally distributed boundary-breaking grouting unit is provided on the main pipeline 13. The boundary-breaking grouting unit includes a boundary-breaking cone 14 and a grouting pipe assembly 16 located below the boundary-breaking cone 14.

[0060] The boundary breaking cone 14 is fixed to the main pipeline 13, and a pressure sensor 15 is installed on the boundary breaking cone 14.

[0061] The grouting pipe assembly 16 is fixed on the main pipe 13. Each grouting pipe assembly 16 is connected to a metering pump through a grouting hose. The grouting pipe assembly 16 has elastic expansion and contraction capabilities.

[0062] In this embodiment, the grouting pipe assembly 16 includes an outer pipe 161, an inner pipe 162, and a spring 163. The inner pipe 162 is slidably connected to the inner wall of the outer pipe 161. A spring mounting plate 164 is sleeved on the inner pipe 162. The two ends of the spring 163 are respectively connected to the spring mounting plate 164 and the main pipe 13. The grouting hose is connected to the outer pipe 161.

[0063] The specific boundary-breaking grouting process is as follows: When placing the outer cylinder 5 and the workpiece 6, the base plate 8 is driven to move upward by the base plate lifting mechanism, which in turn drives the entire boundary-breaking grouting device to move upward, so that the outer cylinder 5 and the workpiece 6 can be placed on the support plate 2 from above, and then the base plate 8 returns to its original position.

[0064] The main pipe 13 is divided into five points in radial motion, from the inside to the outside, namely the first point, the second point, the third point, the fourth point, and the fifth point, to clearly illustrate the motion process.

[0065] In the initial state, the rotating plate 10 is at its lowest position, the main pipe 13 is at the first point, and the boundary cone 14 and the grouting pipe assembly 16 are both located inside the inner cylinder 4. The motor 9 is started, and the motor 9 drives the rotating plate 10 to rotate, which in turn drives the arc groove 11 to rotate, thereby driving the guide pipe 17 and the main pipe 13 to move radially outward.

[0066] When the main pipe 13 moves to the second point, the inner pipe 162 passes through the corresponding through hole 18 and contacts the inner wall of the workpiece 6, and the boundary cone 14 moves to the position of the corresponding through hole 18.

[0067] When the main pipe 13 continues to move to the third position, the inner pipe 162 remains in contact with the inner wall of the workpiece 6 and the spring 163 is compressed, so that the inner pipe 162 gradually slides into the outer pipe 161 to avoid the inner pipe 162 damaging the inner wall of the workpiece 6. At this time, the boundary cone 14 moves through the corresponding through hole 18 and contacts the inner wall of the workpiece 6.

[0068] When the main pipe 13 continues to move to the fourth and fifth positions, the inner pipe 162 remains in contact with the inner wall of the workpiece 6 and continues to compress the spring 163. At this time, the breaking cone 14 pierces the inner wall of the workpiece 6 to form a breaking hole, and the pressure sensor 15 detects the piercing hardness modulus and strength modulus and feeds it back to the control system for recording. Based on this, the internal density value of the workpiece 6 is analyzed to determine the amount of slurry to be injected.

[0069] Then, motor 9 drives rotating plate 10 back to its original position, causing main pipe 13 to return to the first position. At this time, both boundary breaking cone 14 and grouting pipe assembly 16 are located inside inner cylinder 4. The motor lifting mechanism drives motor 9 to move upward to the highest position, and motor 9 drives rotating plate 10 and main pipe 13 to move upward. At this time, grouting pipe assembly 16 in one boundary breaking grouting unit moves upward to the initial position of boundary breaking cone 14, and grouting pipe assembly 16 corresponds to the boundary breaking hole.

[0070] Then, the motor 9 drives the rotating plate 10 to rotate, driving the guide tube 17 and the main pipe 13 to move radially outward. When the main pipe 13 moves to the third position, the inner tube 162 enters the corresponding boundary hole. Based on the slurry injection volume obtained from the system analysis, the control system controls the corresponding metering pump to inject slurry into each boundary hole in a metered manner.

[0071] During the grouting process, the boundary-breaking cone 14 only contacts the inner wall of the workpiece 6 and will not break the boundary of the inner wall of the workpiece 6.

[0072] Thus, during the boundary breaking process of the boundary breaking cone 14, the grouting pipe assembly 16 will not damage other parts of the workpiece 6, and during the grouting process of the grouting pipe assembly 16, the boundary breaking cone 14 will not damage other parts of the workpiece 6.

[0073] After quantitative grouting is completed, it is heated by a heating device.

[0074] Therefore, this device drives the main pipe 13 to move radially by rotating the rotating plate 10, and combines the motor lifting mechanism to realize the longitudinal position switching of the boundary breaking cone and the grouting pipe assembly, thereby achieving the coordination and separation of the boundary breaking and grouting processes.

[0075] Two limiting rings are connected to the guide tube 17, which contact the top and bottom walls of the rotating plate 10, respectively. When the rotating plate 10 rises and falls, the guide tube 17 and the main pipe 13 can rise and fall synchronously without affecting their radial movement. Furthermore, the wire connecting the pressure sensor 15 to the control system can pass through the main pipe 13 and the guide tube 17, and the grouting hose can also pass through the main pipe 13 and the guide tube 17, enabling the installation of the foundation structure.

[0076] In this embodiment, the end of the inner tube 162 is connected to a grouting head 165. By providing the grouting head 165, it is easy to insert it into the boundary hole.

[0077] In this embodiment, multiple main pipes 13 are evenly distributed circumferentially along the axis of the substrate 8 to improve the uniformity of grouting for workpiece 6. Furthermore, three longitudinally evenly distributed grouting units are provided on the main pipes 13.

[0078] In this embodiment, a motor mounting platform 19 is provided, and a plurality of guide posts 20 are provided on the base plate 8. The guide posts 20 movably pass through the motor mounting platform 19, and the motor 9 is mounted on the motor mounting platform 19.

[0079] A motor mounting platform 19 is provided for mounting the motor 9, and a guide column 20 is provided to improve the stability of the motor mounting platform 19 in its vertical movement.

[0080] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. 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 or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within the scope of the claims and specification of the present invention.

Claims

1. A device for enhancing the bonding force of CMC material workpieces, characterized in that, The system includes a machine base (1) and a boundary-breaking grouting device. An inner cylinder (4) is installed on the machine base (1), and several through holes (18) are opened on the inner cylinder (4). An outer cylinder (5) is placed on the machine base (1). The workpiece (6) is located between the outer cylinder (5) and the inner cylinder (4). The outer wall of the workpiece (6) is in contact with the outer cylinder (5), and there is a gap between the inner wall of the workpiece (6) and the inner cylinder (4). A furnace body (7) is provided on the machine base (1), and a heating device is provided inside the furnace body (7). The furnace body (7) includes two half furnace bodies. Two half furnace body driving mechanisms are provided on the machine base (1). Each half furnace body is connected to a half furnace body driving mechanism. When the two half furnace bodies are separated, the outer cylinder (5) and the workpiece (6) can be sleeved outside the inner cylinder (4). When the two half furnace bodies are closed, the heating device can heat the workpiece (6). The grouting device can perform grouting on the workpiece (6) through the through hole (18) on the inner cylinder (4).

2. The CMC material workpiece bonding force enhancement device according to claim 1, characterized in that, The boundary-breaking grouting device includes a base plate (8), a base plate lifting mechanism, a motor (9), a motor lifting mechanism, a rotating plate (10), multiple sliding bars (12), multiple main pipes (13), and multiple metering pumps; The substrate lifting mechanism is located above the machine base (1), and is connected to the substrate (8) to drive the substrate (8) to move up and down. The substrate (8) is ring-shaped. A motor lifting mechanism is provided on the substrate. The motor lifting mechanism is connected to the motor (9) and can drive the motor (9) to move up and down. A rotating plate (10) is connected to the rotating shaft of the motor (9). The rotating plate (10) is located inside the substrate (8). Multiple arc-shaped grooves (11) are opened on the rotating plate (10). The two ends of the arc-shaped grooves (11) are respectively located at different radial positions of the rotating plate (10). Multiple sliding bars (12) are distributed circumferentially along the axis of the substrate (8). The sliding bars (12) can move through the substrate (8) and can move radially along the substrate (8). Through holes are provided on the sliding bars (12). Multiple main pipes (13) are distributed circumferentially along the axis of the substrate (8). The top of the main pipe (13) is connected to a guide pipe (17). The main pipe (13), the arc groove (11) and the sliding bar (12) correspond one to one. The guide pipe (17) moves through the arc groove (11) and the through hole. Two limiting rings are connected to the guide pipe (17). The two limiting rings contact the top wall and bottom wall of the rotating plate (10) respectively. The rotating shaft of the motor (9) rotates, which can drive the rotating plate (10) to rotate, thereby driving the guide pipe (17), the main pipe (13) and the sliding bar (12) to move radially along the substrate (8). At least one longitudinally distributed boundary-breaking grouting unit is provided on the main pipeline (13). The boundary-breaking grouting unit includes a boundary-breaking cone (14) and a grouting pipe assembly (16) located below the boundary-breaking cone (14). The boundary breaking cone (14) is fixed on the main pipeline (13), and a pressure sensor (15) is installed on the boundary breaking cone (14). The grouting pipe assembly (16) is fixed to the main pipe (13), and each grouting pipe assembly (16) has The grouting pipe assembly (16) is elastically expandable and contractile, connected to a metering pump via a grouting hose.

3. The CMC material workpiece bonding force enhancement device according to claim 2, characterized in that, The grouting pipe assembly (16) includes an outer pipe (161), an inner pipe (162), and a spring (163). The inner pipe (162) is slidably connected to the inner wall of the outer pipe (161). A spring mounting plate (164) is sleeved on the inner pipe (162). The two ends of the spring (163) are connected to the spring mounting plate (164) and the main pipe (13) respectively. The grouting hose is connected to the outer pipe (161).

4. The CMC material workpiece bonding force enhancement device according to claim 2, characterized in that, The inner tube (162) is connected to the grouting head (165) at its end.

5. The CMC material workpiece bonding force enhancement device according to claim 2, characterized in that, The main pipes (13) are evenly distributed circumferentially along the axis of the substrate (8).

6. The CMC material workpiece bonding force enhancement device according to claim 2, characterized in that, It also includes a motor mounting platform (19), on which a plurality of guide posts (20) are provided, the guide posts (20) movably passing through the motor mounting platform (19), and the motor (9) is mounted on the motor mounting platform (19).

7. The CMC material workpiece bonding force enhancement device according to claim 1, characterized in that, When the two half-furnaces are joined together, the heating device is assembled into a ring.

8. The CMC material workpiece bonding force enhancement device according to claim 1, characterized in that, A fixed shaft (3) is fixed on the machine base (1), and the inner cylinder (4) is fitted onto the fixed shaft (3).

9. The CMC material workpiece bonding force enhancement device according to claim 8, characterized in that, The fixed shaft (3) is fitted with a bearing plate (2), and the workpiece (6) and the outer cylinder (5) are both placed on the bearing plate (2).

10. The CMC material workpiece bonding force enhancement device according to claim 9, characterized in that, The bearing plate (2) has an annular positioning groove, and the outer cylinder (5) is placed in the annular positioning groove.

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