A finishing device and method for hot extrusion dies for ceramic composite materials

Abstract

This invention relates to the technical field of mold finishing, specifically a finishing device and method for ceramic composite hot extrusion molds. The device includes a main body and a clamping platform mounted on the main body, with the mold body clamped on the platform. A hydraulic cylinder is mounted on the top of the main body, and a lifting platform is located at the bottom of the hydraulic cylinder. By incorporating an adjustable grinding block, this invention can flexibly adapt to the finishing needs of ceramic composite hot extrusion molds with different cavity diameters, eliminating the need for frequent changes in grinding fixtures and improving the device's versatility and processing efficiency. Simultaneously, a nozzle is integrated at the end of the grinding block, allowing for simultaneous air jet cleaning during grinding and polishing operations to promptly remove ceramic debris and dust generated during grinding, preventing hard debris from scratching the processed cavity surface.

Description

Technical Field

[0001] This invention relates to the technical field of mold finishing, specifically to a finishing device and method for a ceramic composite hot extrusion mold. Background Technology

[0002] Ceramic composite hot extrusion dies are specialized precision tooling used in the hot extrusion molding process of ceramic matrix composites. They typically consist of an inner mold, a prestressed support structure, and other components. They are made of ceramic composite materials such as alumina-based and silicon nitride-based materials, which have high hardness, high wear resistance, high temperature resistance, and good chemical stability. They can provide a precise forming cavity for ceramic matrix composite billets under high temperature and high pressure conditions, enabling the billets to obtain the required shape, size, and microstructure during hot extrusion. They are widely used in the manufacture of high-performance ceramic matrix composite components in aerospace, automotive, and electronics industries.

[0003] Precision machining is a key process in mold manufacturing. It mainly involves precision grinding, lapping, polishing and other processes to perform high-precision machining on the mold cavity, working surface and mating surface to achieve the dimensional accuracy, form and position tolerance and surface roughness required by the design. At the same time, it optimizes the micro-morphology of the mold surface, improves the service life of the mold and the surface quality of the molded products, and ensures the stability of the hot extrusion molding process.

[0004] In the field of precision machining technology for hot extrusion dies of ceramic composite materials, in order to ensure the surface accuracy and smoothness of the hot extrusion die cavity and meet the dimensional consistency and demolding requirements of the ceramic composite material molding process, the existing technology generally adopts fixed grinding fixtures with special grinding blocks to carry out grinding and polishing operations of the cavity. Some technical solutions are equipped with independent blowing systems and cooling devices to clean up ceramic debris generated during processing and control the temperature of the processing area. For the processing requirements of dies with different cavity diameters, the processing is usually adapted by changing the grinding head and tooling fixture of the corresponding specifications.

[0005] The above-mentioned operating mode is difficult to flexibly adapt to the processing needs of molds with different cavity diameters. The processing of molds of different specifications requires the corresponding replacement of special grinding tools, which not only increases the cost of tooling preparation and management; but also, during the grinding of semi-enclosed mold cavities or grooves, the high-hardness abrasive grains and chips that fall off are very easy to accumulate at the bottom or corners. Not only is it difficult to effectively remove them by conventional external dust collection methods, but they are also easy to be repeatedly crushed during continuous processing, causing incidental damage and local over-grinding of the cavity surface. Summary of the Invention

[0006] The purpose of this invention is to provide a finishing device and a finishing method for a hot extrusion die for ceramic composite materials, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution:

[0008] A finishing device for a ceramic composite hot extrusion die includes a main body and a clamping platform mounted on the main body. The die body is clamped on the clamping platform. A hydraulic cylinder is mounted on the top of the main body and a lifting platform is mounted on the bottom of the hydraulic cylinder. A support plate and a cross sliding frame are mounted on the bottom of the support plate below the lifting platform. Four sets of sliding grooves are provided on the cross sliding frame. A shaft is provided in the middle section of the cross sliding frame and is rotatably mounted on the lifting platform. A transmission mechanism is sleeved on the shaft. A column and a sliding component slidably mounted on the outside of the column are provided at the bottom of the cross sliding frame. A deflection connection mechanism is provided on the sliding component. A polishing mechanism is slidably mounted on the cross sliding frame. The shaft is hollow and a blowing mechanism is provided inside the shaft.

[0009] As described above, a finishing device for a ceramic composite hot extrusion die includes a transmission mechanism comprising a gear sleeve fitted on the top of the shaft, a drive motor and transmission teeth fitted on the output shaft of the drive motor, the transmission teeth being rotatably mounted on the top of the support disk and meshing with the gear sleeve.

[0010] A finishing device for a ceramic composite hot extrusion die as described above: the sliding component includes a sliding sleeve slidably disposed outside the column and a small motor disposed at the bottom of the sliding sleeve, and a spiral rod is connected to the output shaft of the small motor.

[0011] As described above, a finishing device for a ceramic composite hot extrusion die includes a spiral groove on the inner side of the column, a spiral rod that is slidably disposed on the inner side of the column, and the spiral rod engaging with the spiral groove.

[0012] As described above, a finishing device for a ceramic composite hot extrusion die includes a deflection connection mechanism comprising four sets of connecting seats disposed outside the sliding sleeve. The four sets of connecting seats are circumferentially equidistant, and one end of each connecting seat is hinged to two adapter plates.

[0013] As described above, a finishing device for a ceramic composite hot extrusion die includes a sliding block and a support arm located at the bottom of the sliding block on each of the four sets of sliding grooves of the cross sliding frame. There are four sets of support arms, and one end of each set of support arms is hinged to two adapter plates.

[0014] As described above, a finishing device for a ceramic composite hot extrusion die includes: each of the four sets of support arms has a reserved channel and an air pipe installed above the reserved channel; and each of the four sets of air pipes has a nozzle installed at its end.

[0015] The finishing device for a ceramic composite hot extrusion mold as described above: four sets of nozzles are respectively installed on one side of four sets of support arms, and grinding blocks are provided at the bottom of each of the four sets of support arms.

[0016] The finishing device for a ceramic composite hot extrusion die as described above: the purging mechanism includes an air pump disposed on the top of the support plate and a conduit disposed on the air pump. The conduit is disposed inside the shaft body, and a diversion valve is rotatably installed at the bottom of the conduit. The diversion valve is connected to four sets of nozzles.

[0017] The processing method using a finishing apparatus for a ceramic composite hot extrusion die as described above includes the following steps:

[0018] Step 1: The mold body is clamped and fixed by the clamping platform. Then, the lifting platform is moved down by the hydraulic cylinder, so that the polishing mechanism is inserted into the cavity of the mold body. According to the cavity diameter of the ceramic composite hot extrusion mold, the four sets of polishing blocks are adjusted to expand outward.

[0019] Step 2: Drive the auger rod to rotate on the auger groove on the inner wall of the column by the drive motor, so that the sliding sleeve moves. Then, through the hinge of the adapter plate, the support arm slides outward, so that the four support arms expand outward in sync, and the four sets of grinding blocks fit into the mold cavity.

[0020] Step 3: Start the drive motor to drive the transmission gear to rotate, the transmission gear to drive the gear sleeve and shaft to rotate, the cross slide frame follows the shaft to rotate, and drive the grinding block to perform grinding motion on the mold cavity;

[0021] Step 4: Simultaneously, the air pump operates, distributing compressed gas through conduits and diverter valves into the four sets of conduits, and the gas is sprayed out by the four sets of nozzles, spraying clean compressed gas onto the processing interface.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] By setting an adjustable grinding block, it can flexibly adapt to the precision machining requirements of hot extrusion dies for ceramic composite materials with different cavity diameters, eliminating the need for frequent changes of grinding fixtures and improving the versatility and processing efficiency of the device. At the same time, a nozzle is integrated at the end of the grinding block, which can simultaneously blow air during the grinding and polishing process to remove ceramic chips and dust generated during grinding in a timely manner, and prevent hard chips from scratching the surface of the processed cavity.

[0024] This invention can also achieve directional blowing of the grinding area to remove residual debris in the dead corners of the mold cavity and avoid secondary scratches caused by subsequent manual cleaning; at the same time, it can reduce the surface temperature of the mold cavity to prevent microcracks and thermal deformation of ceramic composite materials due to local overheating. Attached Figure Description

[0025] Figure 1 This is a front view schematic diagram of the finishing device for a hot extrusion die for ceramic composite materials.

[0026] Figure 2 This is a rear view schematic diagram of the finishing device for a hot extrusion die for ceramic composite materials.

[0027] Figure 3 This is a schematic diagram of the support plate, transmission mechanism, cross slide frame, sliding component, deflection connection mechanism and polishing mechanism in the finishing device of hot extrusion die for ceramic composite materials.

[0028] Figure 4 This is a schematic diagram of the transmission mechanism, cross slide frame, sliding component, deflection connection mechanism, and polishing mechanism in the finishing device of a hot extrusion die for ceramic composite materials.

[0029] Figure 5 This is a schematic cross-sectional view of the transmission mechanism, cross slide frame, sliding component, deflection connection mechanism, and polishing mechanism in the finishing device of a ceramic composite hot extrusion die.

[0030] Figure 6 This is a schematic diagram of the sliding component, deflection connection mechanism, and polishing mechanism in the finishing device of a ceramic composite hot extrusion die.

[0031] Figure 7 This is a top view schematic diagram of the cross sliding frame, sliding assembly, deflection connection mechanism, and polishing mechanism in the finishing device of a ceramic composite hot extrusion die.

[0032] Figure 8 This is a schematic diagram of the purging mechanism in the finishing device of a ceramic composite hot extrusion die.

[0033] In the diagram: 1. Main body of the equipment; 2. Clamping platform; 3. Mold body; 4. Hydraulic cylinder; 5. Lifting platform; 6. Support plate; 7. Cross sliding frame; 8. Slide groove; 9. Shaft; 10. Gear sleeve; 11. Transmission gear; 12. Drive motor; 13. Column; 14. Sliding sleeve; 15. Small motor; 16. Helical rod; 17. Connecting seat; 18. Support arm; 19. Sliding block; 20. Adapter plate; 21. Air pump; 22. Conduit; 23. Diverter valve; 24. Air pipe; 25. Nozzle; 26. Grinding block. Detailed Implementation

[0034] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0035] Please see Figures 1-8As an embodiment of the present invention, the finishing device for a ceramic composite hot extrusion die includes a main body 1 and a clamping platform 2 disposed on the main body 1. A die body 3 is clamped on the clamping platform 2. A hydraulic cylinder 4 is disposed on the top of the main body 1 and a lifting platform 5 disposed at the bottom of the hydraulic cylinder 4. A support plate 6 and a cross sliding frame 7 disposed at the bottom of the support plate 6 are disposed below the lifting platform 5. Four sets of sliding grooves 8 are opened on the cross sliding frame 7. A shaft 9 is disposed in the middle section of the cross sliding frame 7. The shaft 9 is rotatably mounted on the lifting platform 5. A transmission mechanism is sleeved on the shaft 9. A column 13 is disposed at the bottom of the cross sliding frame 7 and a sliding component is slidably mounted on the outside of the column 13. A deflection connection mechanism is disposed on the sliding component. A polishing mechanism is slidably mounted on the cross sliding frame 7. The shaft 9 is hollow and a blowing mechanism is disposed inside the shaft 9.

[0036] In this embodiment, the mold body 3 is clamped and fixed by the clamping platform 2. Then, the lifting platform 5 is moved down by the hydraulic cylinder 4, so that the polishing mechanism is inserted into the cavity of the mold body 3. Then, according to the cavity diameter of the hot extrusion mold of the ceramic composite material to be processed, the grinding block 26 is adjusted to expand outward radially. The polishing mechanism below the cross sliding frame 7 is driven by the sliding component to expand outward, so that the polishing mechanism fits the surface of the cavity to be processed to form a uniform contact. Then, the grinding block 26 is driven by the transmission mechanism to perform grinding motion on the mold cavity to remove trace amounts of material and smooth it. Throughout the grinding and polishing process, the blowing mechanism continuously sprays clean compressed gas onto the processing interface to blow away the ceramic shavings and dust in real time, keeping the cavity surface clean.

[0037] As a further embodiment of the present invention, the transmission mechanism includes a gear sleeve 10 sleeved on the top of the shaft 9, a drive motor 12 and a transmission gear 11 sleeved on the output shaft of the drive motor 12 are provided on the top of the support disk 6, the transmission gear 11 is rotatably mounted on the top of the support disk 6, and the transmission gear 11 meshes with the gear sleeve 10.

[0038] In this embodiment, the support plate 6 is located below the lifting platform 5 and moves synchronously with it. At the same time, the drive motor 12 located on the top of the support plate 6 can drive the transmission gear 11 to rotate, and the transmission gear 11 drives the gear sleeve 10 and the shaft 9 to rotate.

[0039] As a further embodiment of the present invention, the sliding assembly includes a sliding sleeve 14 slidably disposed on the outside of the column 13 and a small motor 15 disposed at the bottom of the sliding sleeve 14, wherein a spiral rod 16 is connected to the output shaft of the small motor 15.

[0040] In this embodiment, the column 13 is hollow, and a sliding sleeve 14 is slidably installed on the outside. A small motor 15 is installed below the sliding sleeve 14, which can drive the spiral rod 16 to rotate.

[0041] As a further embodiment of the present invention, a spiral groove is provided on the inner side of the column 13, and the spiral rod 16 is slidably disposed on the inner side of the column 13, and the spiral rod 16 cooperates with the spiral groove.

[0042] In this embodiment, a spiral groove is provided in the hollow cavity of the column 13 to cooperate with the spiral rod 16, which can drive the sliding sleeve 14 to move up and down when the spiral rod 16 rotates.

[0043] As a further embodiment of the present invention, the deflection connection mechanism includes four sets of connecting seats 17 disposed outside the sliding sleeve 14. The four sets of connecting seats 17 are circumferentially equidistant, and one end of each connecting seat 17 is hinged to two adapter plates 20.

[0044] In this embodiment, the sliding sleeve 14 is arranged in an axial array with four sets of connecting seats 17. Each set of connecting seats 17 has two adapter plates 20 hinged to one end. The two adapter plates 20 set on the connecting seat 17 constitute a set.

[0045] As a further embodiment of the present invention, each of the four sets of sliding grooves 8 of the cross sliding frame 7 is slidably mounted with a sliding block 19 and a support arm 18 disposed at the bottom of the sliding block 19. There are four sets of support arms 18, and one end of each set of support arms 18 is hinged to two adapter plates 20.

[0046] In this embodiment, the cross sliding frame 7 is provided with four sets of sliding grooves 8, and each set of sliding grooves 8 is slidably mounted with a sliding block 19. The bottom of each sliding block 19 is connected to a support arm 18. There are a total of four sets of support arms 18, and one end of each set of support arms 18 is hinged by two adapter plates 20.

[0047] As a further embodiment of the present invention, each of the four sets of support arms 18 has a reserved channel and an air pipe 24 disposed on the reserved channel, and a nozzle 25 is installed at the end of each of the four sets of air pipes 24.

[0048] In this embodiment, the support arm 18 has a reserved channel inside for accommodating the air pipe 24, and a nozzle 25 is installed at the end of the air pipe 24.

[0049] As a further embodiment of the present invention, the four sets of nozzles 25 are respectively installed on one side of the four sets of support arms 18, and each of the four sets of support arms 18 is provided with a grinding block 26 at the bottom.

[0050] In this embodiment, four sets of nozzles 25 are respectively installed on one side of four sets of support arms 18, and each support arm 18 has a grinding block 26 at its bottom.

[0051] As a further embodiment of the present invention, the purging mechanism includes an air pump 21 disposed on the top of the support plate 6 and a conduit 22 disposed on the air pump 21. The conduit 22 is disposed inside the shaft 9, and a diversion valve 23 is rotatably mounted on the bottom of the conduit 22. The diversion valve 23 is connected to four sets of nozzles 25.

[0052] In this embodiment, the air pump 21 guides the gas to the diversion valve 23 through the conduit 22. The conduit 22 and the diversion valve 23 are rotatably connected to ensure stable gas delivery during operation. The gas is diverted to four air pipes 24 through the diversion valve 23 and finally sprayed out by four sets of nozzles 25.

[0053] Each set of air tubes 24 is made of an elastic and malleable material, which allows the air tubes 24 to be stretchable and extend accordingly as the support arm 18 moves.

[0054] The processing method using a finishing apparatus for a ceramic composite hot extrusion die as described above includes the following steps:

[0055] Step 1: The mold body 3 is clamped and fixed by the clamping platform 2. Then, the lifting platform 5 is moved down by the hydraulic cylinder 4, so that the polishing mechanism is inserted into the cavity of the mold body 3. According to the cavity diameter of the ceramic composite hot extrusion mold, the four sets of polishing blocks 26 are adjusted to expand outward.

[0056] Step 2: Drive the spiral rod 16 to rotate on the spiral groove on the inner wall of the column 13 by the drive motor 12, so that the sliding sleeve 14 moves. Then, through the hinge of the adapter plate 20, the support arm 18 slides outward, so that the four support arms 18 perform outward expansion action simultaneously, and the four sets of grinding blocks 26 fit into the mold cavity.

[0057] Step 3: Start the drive motor 12 to drive the transmission gear 11 to rotate. The transmission gear 11 drives the gear sleeve 10 and the shaft 9 to rotate. The cross sliding frame 7 follows the shaft 9 to rotate, driving the grinding block 26 to perform grinding motion on the mold cavity.

[0058] Step 4: Simultaneously, the air pump 21 operates, distributing compressed gas through the conduit 22 and the diverter valve 23 into the four sets of conduits 22, and the gas is sprayed out by the four sets of nozzles 25, spraying clean compressed gas onto the processing interface.

[0059] The above embodiments are exemplary and not restrictive. Therefore, any technical solutions that can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention are included within the scope of the present invention.

Claims

1. A finishing device for ceramic composite material hot extrusion die, comprising a device body (1) and a clamping table (2) arranged on the device body (1), a die body (3) being clamped on the clamping table (2), a hydraulic cylinder (4) being arranged on the top of the device body (1) and a lifting platform (5) being arranged on the bottom of the hydraulic cylinder (4), characterized in that, Below the lifting platform (5) is a support plate (6) and a cross sliding frame (7) at the bottom of the support plate (6). Four sets of sliding grooves (8) are provided on the cross sliding frame (7). A shaft (9) is provided in the middle section of the cross sliding frame (7). The shaft (9) is rotatably installed on the lifting platform (5). A transmission mechanism is sleeved on the shaft (9). A column (13) is provided at the bottom of the cross sliding frame (7) and a sliding component is slidably installed on the outside of the column (13). A deflection connection mechanism is provided on the sliding component. A polishing mechanism is slidably installed on the cross sliding frame (7). The shaft (9) is hollow. A blowing mechanism is provided inside the shaft (9).

2. The finishing device of a ceramic composite material hot extrusion die according to claim 1, wherein The transmission mechanism includes a gear sleeve (10) sleeved on the top of the shaft (9), and a drive motor (12) and a transmission gear (11) sleeved on the output shaft of the drive motor (12) are provided on the top of the support disk (6). The transmission gear (11) is rotatably mounted on the top of the support disk (6), and the transmission gear (11) meshes with the gear sleeve (10).

3. The finishing device of a ceramic composite material hot extrusion die according to claim 2, wherein The sliding assembly includes a sliding sleeve (14) slidably disposed outside the column (13) and a small motor (15) disposed at the bottom of the sliding sleeve (14), with a helical rod (16) connected to the output shaft of the small motor (15).

4. The finishing device of a ceramic composite material hot extrusion die according to claim 3, wherein The inner side of the column (13) is provided with a spiral groove, and the spiral rod (16) is slidably disposed on the inner side of the column (13), and the spiral rod (16) cooperates with the spiral groove.

5. The finishing device of a ceramic composite material hot extrusion die according to claim 4, wherein The deflection connection mechanism includes four sets of connecting seats (17) disposed outside the sliding sleeve (14). The four sets of connecting seats (17) are circumferentially equidistant. One end of each connecting seat (17) is hinged to two adapter plates (20).

6. The finishing device of a ceramic composite material hot extrusion die according to claim 5, wherein Sliding blocks (19) and support arms (18) are slidably installed on the four sets of sliding grooves (8) of the cross sliding frame (7). There are four sets of support arms (18), and one end of each set of support arms (18) is hinged to two adapter plates (20).

7. The finishing device of a ceramic composite material hot extrusion die according to claim 6, wherein Each of the four sets of support arms (18) has a reserved channel and an air pipe (24) set on the reserved channel. Each of the four sets of air pipes (24) has a nozzle (25) installed at the end.

8. The finishing device of a ceramic composite material hot extrusion die according to claim 7, wherein The four sets of nozzles (25) are respectively installed on one side of the four sets of support arms (18), and the bottom of each of the four sets of support arms (18) is provided with a grinding block (26).

9. The finishing device of a ceramic composite material hot extrusion die according to claim 8, wherein The purging mechanism includes an air pump (21) located on the top of the support plate (6) and a conduit (22) located on the air pump (21). The conduit (22) is located inside the shaft (9). A diversion valve (23) is rotatably installed at the bottom of the conduit (22). The diversion valve (23) is connected to four sets of nozzles (25).

10. A method of machining using a finishing device of a ceramic composite hot extrusion die according to any one of claims 1 to 9, characterized in that, Includes the following steps: Step 1: The mold body (3) is clamped and fixed by the clamping platform (2), and then the lifting platform (5) is driven down by the hydraulic cylinder (4) so ​​that the polishing mechanism is inserted into the cavity of the mold body (3). According to the cavity diameter of the ceramic composite hot extrusion mold, the four sets of polishing blocks (26) are adjusted to expand outward. Step 2: Drive the auger rod (16) to rotate on the auger groove on the inner wall of the column (13) by the drive motor (12), so that the sliding sleeve (14) moves, and then drive the support arm (18) to slide outward through the hinge of the adapter plate (20), so that the four support arms (18) can expand outward in sync, and fit the four sets of grinding blocks (26) into the mold cavity; Step 3: Start the drive motor (12) to drive the transmission gear (11) to rotate. The transmission gear (11) drives the gear sleeve (10) and the shaft (9) to rotate. The cross slide frame (7) follows the shaft (9) to rotate, driving the grinding block (26) to perform grinding motion on the mold cavity. Step 4: At the same time, the air pump (21) operates, distributing the compressed gas through the conduit (22) and the diverter valve (23) into the four sets of conduits (22), and the gas is sprayed out by the four sets of nozzles (25) to spray clean compressed gas onto the processing interface.

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