Centrifugal casting equipment and process for continuous fiber reinforced aluminum matrix composite pipe

Abstract

The invention provides centrifugal casting equipment and process for a continuous fiber reinforced aluminum matrix composite pipe, and relates to the technical field of centrifugal casting, the centrifugal casting equipment comprises a centrifugal casting device, the centrifugal casting device comprises a base, two box walls are symmetrically welded to the top end of the base, and a cylindrical casting mold is rotationally arranged between the two box walls; the cylindrical casting mold is of a structure with a sealed tail end and an open head end, a circular blanking cap is fixed on the head end opening of the cylindrical casting mold in a sealing manner, and a pouring hole with a section of a convex structure is formed in the center of the circular blanking cap in a penetrating manner; two vertical rail shafts are symmetrically welded to the outer side of one box wall, a U-shaped sliding frame is slidably mounted on the two vertical rail shafts, and an L-shaped pouring pipe is slidably mounted in the middle of a longitudinal side rod of the U-shaped sliding frame in a penetrating mode. The sliding opening and closing operation of the circular blocking plate can be driven to be executed through the pulling and inserting operation of the L-shaped pouring pipe, so that the trouble that the two operations need to be executed step by step in sequence can be omitted, and the production and use efficiency of casting equipment can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of centrifugal casting, and particularly relates to a centrifugal casting device and process for continuously fiber-reinforced aluminum matrix composite pipes. Background Art

[0002] The continuously fiber-reinforced aluminum matrix composite has the advantages of light weight and high strength, and is widely used in fields such as aerospace, transportation, chips, and the defense industry. There is surface tension between the aluminum and the continuous fibers in the continuously fiber-reinforced aluminum matrix composite, so it is usually produced in forms such as centrifugal casting and powder metallurgy.

[0003] The cover plate for sealing the open end of the mold on the centrifugal casting device is provided with a pouring hole running through it, and a sealing cover plate is configured on the pouring. The pouring pipe fitting of the centrifugal casting device needs to be aligned with the pouring hole and inserted into the pouring hole to pour the aluminum-based melt into the mold. To avoid interference with the high-speed rotation of the mold, after use, the pouring pipe fitting needs to be withdrawn from the pouring hole and separated from the mold. When pouring the aluminum-based melt, the cover plate needs to be opened to expose the pouring hole, and the cover plate needs to be closed after pouring.

[0004] For the existing centrifugal casting device, the opening and closing operations of the cover plate and the insertion and extraction operations of the pouring hole need to be performed step by step in sequence, which is rather troublesome and inconvenient to operate, and is not conducive to simplifying the operation steps of the centrifugal casting device and improving the production and use efficiency of the centrifugal casting device. Summary of the Invention

[0005] In view of this, the present invention provides a centrifugal casting device and process for continuously fiber-reinforced aluminum matrix composite pipes to solve the problem of being not conducive to simplifying the operation steps of the centrifugal casting device.

[0006] The technical solution proposed by the present invention is as follows: A centrifugal casting device and process for continuously fiber-reinforced aluminum matrix composite pipes, specifically including a centrifugal casting device, the centrifugal casting device includes a base and a cylindrical mold, and two box walls are symmetrically welded to the top of the base, and a cylindrical mold is rotatably arranged between the two box walls;

[0007] The cylindrical casting mold has a structure in which the tail end blocks the opening of the head end, and a circular plugging cover is sealed and fixed on the opening of the head end of the cylindrical casting mold, and a pouring hole with a convex cross-section structure is penetrated at the center position of the circular plugging cover; the pouring hole is sealed with a circular plugging plate with a convex cross-section structure, and two sliding shafts are symmetrically welded at the outer edge position of the large diameter part of the circular plugging plate, and the two sliding shafts are slidably matched with the center part of the circular plugging plate in the form of spring push positioning; two vertical track shafts are symmetrically welded on the outer side of the box wall, and a 図-shaped sliding frame is slidably installed on the two vertical track shafts, and an L-shaped pouring pipe is slidably installed through the middle part of the longitudinal side rod of the 図-shaped sliding frame, and the head end of the L-shaped pouring pipe is a plugging structure, and a liquid outlet groove is penetrated at the bottom side of the head end part of the L-shaped pouring pipe. When the 図-shaped sliding frame slides to a high position, the head end of the L-shaped pouring pipe is aligned with the pouring hole, and in this state, when the L-shaped pouring pipe slides toward the pouring hole, its head end is in contact with the circular plugging plate.

[0008] Furthermore, a funnel is welded on the top opening of the L-shaped pouring pipe, and two symmetrical limit bars are protruded from the outer side of the longitudinal pipe section of the L-shaped pouring pipe. The two limit bars slide through the middle part of the longitudinal side rod of the U-shaped sliding frame.

[0009] Furthermore, the large diameter portion of the circular plugging plate is plugged and fitted with the large diameter portion of the pouring hole and abuts against the inner annular wall of the large diameter portion of the pouring hole, and the small diameter portion of the circular plugging plate is plugged and fitted with the small diameter portion of the pouring hole.

[0010] Furthermore, two shaft sleeves are symmetrically welded to the open end of the U-shaped sliding frame, and the two shaft sleeves are correspondingly slidably matched with the two vertical track shafts. Two tightening bolts are symmetrically installed through the two shaft sleeves in the form of threads being screwed, and the head ends of the two tightening bolts are correspondingly pressed against the two vertical track shafts.

[0011] A locking bolt is installed through the bottom of the middle section of the longitudinal side rod of the L-shaped sliding frame in the form of a threaded screw, and the head end of the locking bolt is in abutment contact with the longitudinal pipe section of the L-shaped casting pipe.

[0012] Furthermore, two annular bearing seats are symmetrically welded in the space between the two box walls, and the cylindrical casting is assembled by rotating through the two annular bearing seats through the bearings embedded in the two annular bearing seats;

[0013] A circular through groove is formed at the center of the two box walls, and the head end of the cylindrical casting mold is in cooperation with the circular through groove on the corresponding side;

[0014] A fiber preform with a cylindrical structure is inserted inside the cylindrical casting mold.

[0015] Furthermore, a power station is fixedly installed on the top of the base outside the two box walls. The power station includes a servo motor and a servo driver. The rotating shaft of the servo motor passes through the circular through groove on the corresponding side and is transmitted to the cylindrical casting through a coupling.

[0016] Furthermore, a back plate is welded between the two vertical sides of the two box walls, a long cover plate closed and connected to the back plate is welded at the top of the two box walls, a box cover is rotatably installed on one long side of the long cover plate, and the two box walls, the back plate, the long cover plate and the box cover together constitute a complete protective box.

[0017] Furthermore, the outer circumference of the head end portion of the cylindrical casting is provided with a thread, and a rotation drive assembly is provided on the portion, the rotation drive assembly comprises a threaded collar and a mounting ring welded concentrically with the threaded collar, and the threaded collar is sleeved on the head end portion of the cylindrical casting in the form of a threaded screw;

[0018] The mounting ring is provided with a rotating circle, the inner circumference of which is provided with an annular guide groove, the cross section of the mounting ring is a convex structure, and the convex part thereof is rotatably matched with the annular guide groove;

[0019] A circle of longitudinal positioning shaft is welded on the side of the mounting ring away from the threaded sleeve, and a driving slip ring is slidably sleeved on the circle of longitudinal positioning shaft in the form of spring push positioning, and a square limit sleeve is welded on the head end of the circle of longitudinal positioning shaft, and a circle of baffle rods is slidably installed through the circle of square limit sleeves, and a circle of connecting rods is rotatably connected between the tail end of the circle of baffle rods and the outer ring of the driving slip ring, and the circle of baffle rods is pressed against the circular plug cover.

[0020] Furthermore, it also includes a pre-winding device, an aluminum liquid melting device, a preform preheating device and a cooling treatment device.

[0021] Further, the following steps are included:

[0022] ①. Winding fiber preform: PAN carbon fiber is wound into a fiber preform through a pre-winding device; the fiber winding spacing is 0.1mm to 5mm;

[0023] ② Melting aluminum liquid: Melt the pure aluminum matrix at a temperature of 700-900°C through an aluminum liquid melting device, use argon gas for atmosphere protection during the melting process, and perform slag removal to obtain a molten liquid;

[0024] ③. Preheating the preform: insert the fiber preform obtained in step ① into a cylindrical mold on a centrifugal casting device, and preheat it in an environment of 400-500° C. for 1 h to 2 h through a preform preheating device to obtain a preheated fiber preform;

[0025] ④. Install the fiber preform: Seal the head opening of the cylindrical mold through the circular plug, and block and limit the fiber preform obtained in step ③ in the cylindrical mold;

[0026] ⑤. Centrifugal casting: Start the servo motor. When the rotational speed of the servo motor reaches the predetermined range, pour the molten metal obtained in step ② into the cylindrical mold through the L-shaped pouring pipe. The servo motor drives the cylindrical mold to rotate in the rotational speed range of 1000 rpm to 6000 rpm and maintain for 0.1 to 30 minutes. During this process, the molten metal is thrown towards the inner wall of the cylindrical mold under the action of centrifugal force and tightly combines with the fiber preform to obtain a fiber-reinforced aluminum matrix composite material; the volume fraction of carbon fibers in the fiber-reinforced aluminum matrix composite material is 10% to 40%;

[0027] ⑥. Cooling treatment: Cool the fiber-reinforced aluminum matrix composite material obtained in step ⑤ to room temperature through a cooling treatment device;

[0028] ⑦. Unloading: Withdraw and remove the cooled fiber-reinforced aluminum matrix composite material obtained in step ⑥ from the cylindrical mold to complete all the technological processes.

[0029] The centrifugal casting equipment and process for a continuous fiber-reinforced aluminum matrix composite material pipe provided by the present invention have the following beneficial effects:

[0030] First, the driving slip ring, a circle of connecting rods, and a circle of stop rods are jointly connected to form multiple sets of crank-slider mechanisms arranged in a circle. Through these multiple sets of crank-slider mechanisms, the reciprocating sliding drive of the circle along the longitudinal positioning shaft can drive the circle to rotate, and can drive a circle of stop rods to synchronously expand and contract and slide along a circle of square limiting sleeves, controlling a circle of stop rods to insert and block in the adjacent space outside the circular plug or withdraw from this space, implementing sealing and closing and loosening and opening of the circular plug. This can eliminate the cumbersome steps of sequentially driving the expansion and contraction of a circle of stop rods when performing the opening and closing operations on the circular plug, which helps to improve the opening and closing efficiency of the circular plug.

[0031] Second, the sliding switch operation of the circular plug plate can be driven by the insertion and extraction operation of the L-shaped pouring pipe, which can eliminate the trouble of sequentially performing the above two operations, helps to simplify the operation steps of the casting equipment, and improves the production and use efficiency of the casting equipment.

[0032] Third, when the L-shaped pouring pipe passes through the pouring hole, it can abut against the circular plug plate and push the circular plug plate away from the pouring hole, opening the pouring hole. And when the circular plug plate is pushed away and driven, it compresses the springs on the two sliding shafts. When the pouring operation is completed, the front end part of the L-shaped pouring pipe needs to be slid back and withdrawn from the cylindrical mold to facilitate closing the pouring hole and avoid the front end part of the L-shaped pouring pipe continuously inserted in the cylindrical mold, which may interfere with the high-speed centrifugal rotation of the cylindrical mold. Description of the Drawings

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly introduced below.

[0034] The accompanying drawings in the following description only relate to some embodiments of the present invention and do not limit the present invention.

[0035] In the accompanying drawings:

[0036] Figure 1 A schematic diagram showing the installation position of the power station in the present invention is shown;

[0037] Figure 2 A schematic diagram showing the installation position of the cylindrical mold in the present invention is shown;

[0038] Figure 3 A diagram showing the relative position relationship between the L-shaped pouring tube and the circular plug plate in the present invention is shown;

[0039] Figure 4 A schematic diagram showing the half-section internal structure of the cylindrical mold in the present invention is shown;

[0040] Figure 5 A schematic diagram showing the disassembly state of the fiber preform in the present invention is shown;

[0041] Figure 6 A schematic diagram showing the installation position of the drive slip ring in the present invention is shown;

[0042] Figure 7 A schematic diagram showing the half-section structure of the drive slip ring and the mounting ring in the present invention is shown;

[0043] Figure 8 A schematic diagram showing the structure of the rotary drive assembly in the present invention is shown;

[0044] Figure 9 A process flow diagram of the present invention is shown.

[0045] List of reference numerals:

[0046] 1. Base; 103. Box wall; 1031. Long strip cover plate; 1032. Circular through groove; 104. Ring bearing seat; 105. Vertical rail shaft; 2. Power station; 3. Box cover; 4. Cylindrical mold; 5. L-shaped pouring pipe; 501. Hopper; 502. Limit strip; 503. Liquid outlet groove; 6. U-shaped sliding frame; 601. Bush; 602. Tightening bolt; 603. Locking bolt; 7. Circular plug cover; 701. Pouring hole; 8. Rotary drive assembly; 801. Threaded collar; 8011. Handle bar; 802. Mounting ring; 803. Rotating circle; 8031. Vertically arranged positioning shaft; 8032. Square limit sleeve; 8033. Ring guide groove; 804. Connecting rod; 805. Driving sliding ring; 806. Stop bar; 9. Circular plug plate; 901. Slide shaft; 10. Fiber preform. Detailed implementation manners

[0047] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. Based on the described embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0048] Please refer to Figures 1 to 8 , Embodiment 1:

[0049] This embodiment provides a centrifugal casting device for continuously fiber-reinforced aluminum matrix composite pipes, including a centrifugal casting device. The centrifugal casting device includes a base 1 and a cylindrical mold 4. Two box walls 103 are symmetrically welded to the top of the base 1, and the cylindrical mold 4 is rotatably arranged between the two box walls 103;

[0050] The cylindrical mold 4 has a structure with its tail end sealed and its head end open. A circular plug cover 7 is fixedly sealed on the head end opening of the cylindrical mold 4. A pouring hole 701 with a convex cross-section is penetrated and opened at the center of the circular plug cover 7. A circular plug plate 9 with a convex cross-section is sealed on the pouring hole 701. At the outer edge position of the large-diameter part of the circular plug plate 9, two sliding shafts 901 are symmetrically welded. The two sliding shafts 901 are in sliding fit with the center part of the circular plug plate 9 in a form of spring pushing and positioning. On the outer side of one box wall 103, two vertical track shafts 105 are symmetrically welded. A U-shaped sliding frame 6 is slidably installed on the two vertical track shafts 105. A U-shaped sliding frame 6 is slidably installed on the two vertical track shafts 105. In the middle part of the longitudinal side rod of the U-shaped sliding frame 6, an L-shaped pouring pipe 5 is penetrated and slidably installed. The head end of the L-shaped pouring pipe 5 is a sealed structure. A liquid outlet groove 503 is penetrated and opened at the bottom side of the head end part of the L-shaped pouring pipe 5. When the U-shaped sliding frame 6 slides to the high position state, the head end of the L-shaped pouring pipe 5 is aligned with the pouring hole 701. And in this state, when the L-shaped pouring pipe 5 slides towards the pouring hole 701, its head end abuts against the circular plug plate 9.

[0051] Preferably, a funnel 501 is welded on the top opening of the L-shaped pouring pipe 5. Two symmetrically arranged limiting strips 502 are convexly arranged on the outer side of the longitudinal pipe section of the L-shaped pouring pipe 5. The two limiting strips 502 are in sliding fit with the middle part of the longitudinal side rod of the U-shaped sliding frame 6.

[0052] Preferably, the large-diameter part of the circular plug plate 9 is inserted and adapted to the large-diameter part of the pouring hole 701 and abuts against the inner circumferential wall of the large-diameter part of the pouring hole 701. The small-diameter part of the circular plug plate 9 is inserted and adapted to the small-diameter part of the pouring hole 701.

[0053] Preferably, two shaft sleeves 601 are symmetrically welded at the open end of the U-shaped sliding frame 6. The two shaft sleeves 601 are slidably matched with the two vertical track shafts 105 correspondingly. Two tightening bolts 602 are symmetrically installed through the two shaft sleeves 601 in a threaded form. The heads of the two tightening bolts 602 are correspondingly in pressing contact with the two vertical track shafts 105. At the bottom of the middle section of the longitudinal side rod of the U-shaped sliding frame 6, a locking bolt 603 is installed through in a threaded form. The head of the locking bolt 603 is in pressing contact with the longitudinal pipe section of the L-shaped pouring pipe 5.

[0054] Preferably, two annular bearing seats 104 are symmetrically welded in the space between the two box walls 103. The cylindrical mold 4 is rotationally assembled through the bearings embedded in the two annular bearing seats 104 and penetrating through the two annular bearing seats 104. Circular through grooves 1032 are penetrated and opened at the center positions of the two box walls 103. The head end part of the cylindrical mold 4 is in through fit with the corresponding circular through groove 1032. A cylindrical fiber preform 10 is inserted inside the cylindrical mold 4.

[0055] Preferably, a power station 2 is fixedly installed on the top of the base 1 outside the two box walls 103. The power station 2 includes a servo motor and a servo driver. The rotating shaft of the servo motor passes through the circular through groove 1032 on the corresponding side and is transmitted to the cylindrical casting mold 4 through a coupling.

[0056] Preferably, a back plate is welded between the two vertical sides of the two box walls 103, a long cover plate 1031 closed and connected to the back plate is welded at the top of the two box walls 103, a box cover 3 is rotatably installed on one long side of the long cover plate 1031, and the two box walls 103, the back plate, the long cover plate 1031 and the box cover 3 together constitute a complete protective box.

[0057] Preferably, the outer circumference of the head end portion of the cylindrical mold 4 is provided with a thread, and a rotation drive assembly 8 is arranged on the portion, and the rotation drive assembly 8 comprises a threaded collar 801 and a mounting ring 802 welded concentrically with the threaded collar 801, the threaded collar 801 is sleeved on the head end portion of the cylindrical mold 4 in the form of a threaded screw, and a circle of handle 8011 is welded on the outer circumference of the threaded collar 801; a rotating circle 803 is arranged on the mounting ring 802, and an annular guide groove 8033 is arranged on the inner circumference of the rotating circle 803, and the cross section of the mounting ring 802 is a convex structure, and its convex part is in contact with the annular guide groove 8033. The groove 8033 is rotatably matched; a circle of longitudinal positioning shaft 8031 ​​is welded on the side of the mounting ring 802 away from the threaded collar 801, and a driving slip ring 805 is slidably sleeved on the circle of longitudinal positioning shaft 8031 ​​in the form of spring push positioning, and a square limit sleeve 8032 is welded on the head end of the circle of longitudinal positioning shaft 8031, and a circle of baffle rod 806 is slidably installed through the circle of square limit sleeve 8032, and a circle of connecting rod 804 is rotatably connected between the tail end of the circle of baffle rod 806 and the outer ring of the driving slip ring 805, and the circle of baffle rod 806 is pressed against the circular plug cover 7.

[0058] Preferably, it also includes a pre-winding device, an aluminum liquid melting device, a preform preheating device and a cooling treatment device.

[0059] The working principle, specific details, implementation steps, functions and interrelationships of the above-mentioned features, and their roles in implementing the present invention are described in detail below:

[0060] Ceramic fiber washers are fixed on the sealing surface of the large diameter portion of the circular plugging plate 9 facing the pouring hole 701 and the inner circular sealing surface of the circular plugging cover 7.

[0061] The forward and reverse torsion rotation drive assembly 8 can push and drive the rotation circle 803, a longitudinal positioning shaft 8031 of one circle, a square limiting sleeve 8032 of one circle, and a retaining rod 806 of one circle that slides out of the square limiting sleeve 8032 to reciprocate axially along the cylindrical mold 4, controlling the retaining rod 806 of one circle to abut and contact or separate from the circular plug 7, applying tight sealing and releasing force to the circular plug 7. When applying tight sealing to the circular plug 7, the circular plug 7 can be closed on the first-end opening of the cylindrical mold 4. When applying releasing force to the circular plug 7, the circular plug 7 can be removed from the first-end opening of the cylindrical mold 4 to open the opening. It should be noted that: in the above process, to prevent the rotation circle 803 and the retaining rod 806 of one circle from twisting synchronously with the rotation drive assembly 8, when twisting and operating the rotation drive assembly 8 with one hand, the other hand should be grasped on any longitudinal positioning shaft 8031 to limit the torsion of the rotation circle 803 and the retaining rod 806 of one circle.

[0062] When disassembling and opening the circular plug 7, it is necessary to withdraw the retaining rod 806 of one circle from the adjacent space outside the circular plug 7 to avoid the retaining rod 806 of one circle continuously remaining in the sliding-out state and causing an obstructive obstacle to the disassembly and opening of the circular plug 7. The drive slip ring 805, the connecting rod 804 of one circle, and the retaining rod 806 of one circle are jointly connected to form multiple sets of crank-slider mechanisms arranged in a circle. Through these multiple sets of crank-slider mechanisms, the rotation circle 803 is reciprocally slid along the longitudinal positioning shaft 8031 of one circle, which can drive the retaining rod 806 of one circle to synchronously expand and contract and slide along the square limiting sleeve 8032 of one circle, controlling the retaining rod 806 of one circle to be inserted into or withdrawn from the adjacent space outside the circular plug 7, implementing sealing and closing and releasing and opening of the circular plug 7. This can save the cumbersome steps of sequentially driving the expansion and contraction of the retaining rod 806 of one circle when performing opening and closing operations on the circular plug 7, and helps to improve the opening and closing efficiency of the circular plug 7.

[0063] The funnel 501 and the L-shaped pouring tube 5 together form a pouring pipe fitting, through which aluminum-based molten liquid can be poured into the closed cylindrical mold 4. When pouring the aluminum-based molten liquid, the head end of the L-shaped pouring tube 5 needs to be inserted into the cylindrical mold 4 through the pouring hole 701. When the head end of the L-shaped pouring tube 5 is inserted into the cylindrical mold 4, the liquid outlet groove 503 on its bottom side is exposed to the inside of the cylindrical mold 4, so that the aluminum-based molten liquid poured into the pouring pipe fitting can be leaked into the cylindrical mold 4; when the L-shaped pouring tube 5 passes through the pouring hole 701, it can come into contact with the circular plugging plate 9 and push the circular plugging plate 9 away from the pouring hole 701, thereby opening the pouring hole 701, and the circular plugging plate 9 compresses the springs on the two sliding shafts 901 when being pushed away. After the pouring operation is completed, the head end of the L-shaped pouring tube 5 needs to be slid back and pulled out of the cylindrical mold 4 to facilitate the closure of the pouring hole 701 and avoid the head end of the L-shaped pouring tube 5 being continuously inserted in the cylindrical mold 4, which may interfere with the high-speed centrifugal rotation of the cylindrical mold 4. When the L-shaped pouring tube 5 is slid back and pulled out of the cylindrical mold 4, the above two springs lose the pushing and holding force from the L-shaped pouring tube 5, and can automatically push back to drive the circular plugging plate 9 to slide back and reset and re-resist the covering pouring hole 701. In this way, the sliding switch operation of the circular plugging plate 9 can be driven and executed in conjunction with the insertion and withdrawal operation of the L-shaped pouring tube 5, which can save the trouble of performing the above two operations step by step, help simplify the operating steps of the casting equipment, and improve the production and use efficiency of the casting equipment.

[0064] The servo motor can drive the cylindrical mold 4 to rotate at a high speed, and centrifugally press the aluminum-based molten liquid filled in the cylindrical mold 4 onto the fiber preform 10, so that the aluminum-based molten liquid and the fiber preform 10 are tightly combined to form a continuous fiber-reinforced aluminum-based composite material pipe; the servo motor can accurately control its rotation speed through the servo driver matched with it, so that it can drive the cylindrical mold 4 to rotate within a specified rotation speed range, so as to ensure that when the aluminum-based molten liquid and the fiber preform 10 are centrifugally cast, the aluminum-based molten liquid and the fiber preform 10 can be accurately and high-quality cast under the action of centrifugal force within the specified range.

[0065] Based on the first embodiment, the second embodiment is implemented. Please refer to Figure 9 :

[0066] This embodiment proposes a centrifugal casting process for a continuous fiber reinforced aluminum-based composite material pipe, which is applied to the centrifugal casting equipment in the first embodiment and includes the following steps:

[0067] ①, winding fiber preform 10: winding PAN carbon fiber into fiber preform 10 by pre-winding device; fiber winding spacing is 0.1mm~5mm;

[0068] ②. Melting aluminum liquid: The pure aluminum matrix is melted by an aluminum liquid melting device under the condition of a temperature of 700 - 900 °C. During the melting process, argon is used for atmosphere protection, and slag removal treatment is carried out to obtain the molten liquid;

[0069] ③. Preheating the preform: The fiber preform 10 obtained in step ① is inserted into the cylindrical mold 4 on the centrifugal casting device, and is preheated in an environment of 400 - 500 °C for 1 - 2 hours by a preform preheating device to obtain the preheated fiber preform 10;

[0070] ④. Installing the fiber preform 10: The circular plug 7 is used to seal the head opening of the cylindrical mold 4, and the fiber preform 10 obtained in step ③ is blocked and limited in the cylindrical mold 4;

[0071] ⑤. Centrifugal casting: Start the servo motor. When the rotational speed of the servo motor reaches the predetermined range, the molten liquid obtained in step ② is poured into the cylindrical mold 4 through the L-shaped pouring tube 5. The servo motor drives the cylindrical mold 4 to rotate in the rotational speed range of 1000 rpm - 6000 rpm and maintain for 0.1 - 30 minutes. During this process, the molten liquid is thrown towards the inner wall of the cylindrical mold 4 under the action of centrifugal force and is tightly combined with the fiber preform 10 to obtain the fiber-reinforced aluminum matrix composite material; the volume fraction of carbon fibers in the fiber-reinforced aluminum matrix composite material is 10% - 40%;

[0072] ⑥. Cooling treatment: The fiber-reinforced aluminum matrix composite material obtained in step ⑤ is cooled to room temperature by a cooling treatment device;

[0073] ⑦. Unloading: The cooled fiber-reinforced aluminum matrix composite material obtained in step ⑥ is withdrawn and taken out from the cylindrical mold 4 to complete all the technological processes.

[0074] In this article, the following points need to be noted:

[0075] 1. The attached drawings of the embodiments of the present invention only relate to the structures involved in the embodiments of the present invention, and other structures can refer to the usual designs.

[0076] 2. Without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other to obtain new embodiments.

[0077] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A centrifugal casting device for continuous fiber reinforced aluminum matrix composite pipes, including a centrifugal casting device, the centrifugal casting device includes a base (1) and a cylindrical mold (4), two box walls (103) are symmetrically welded to the top of the base (1), and a cylindrical mold (4) is rotatably arranged between the two box walls (103); It is characterized in that The cylindrical mold (4) has a structure with a sealed tail end and an open head end. A circular plug cover (7) is hermetically fixed on the open head end of the cylindrical mold (4), and a pouring hole (701) with a convex cross-section is penetrated and opened at the center position of the circular plug cover (7); A circular plug plate (9) with a convex cross-section is covered on the pouring hole (701). Two sliding shafts (901) are symmetrically welded to the outer edge position of the large-diameter part of the circular plug plate (9). The two sliding shafts (901) are slidably and cooperatively penetrated with the central part of the circular plug plate (9) in the form of spring pushing and positioning; Two vertical track shafts (105) are symmetrically welded to the outside of one of the box walls (103). A U-shaped sliding frame (6) is slidably installed on the two vertical track shafts (105). An L-shaped pouring pipe (5) is slidably installed through the middle part of the vertical side rod of the U-shaped sliding frame (6). The head end of the L-shaped pouring pipe (5) is a sealed structure. A liquid outlet groove (503) is penetrated and opened at the bottom side of the head end part of the L-shaped pouring pipe (5). When the U-shaped sliding frame (6) slides to the high position state, the head end of the L-shaped pouring pipe (5) is aligned with the pouring hole (701). And in this state, when the L-shaped pouring pipe (5) slides towards the pouring hole (701), its head end abuts against the circular plug plate (9).

2. The centrifugal casting equipment for continuous fiber reinforced aluminum-based composite pipe according to claim 1, characterized in that: A funnel (501) is welded to the top opening of the L-shaped pouring pipe (5). Two symmetrically arranged limiting strips (502) are凸出设置 on the outer side of the vertical pipe section of the L-shaped pouring pipe (5). The two limiting strips (502) are slidably and cooperatively penetrated with the middle part of the vertical side rod of the U-shaped sliding frame (6).

3. The centrifugal casting equipment for continuous fiber reinforced aluminum-based composite pipe according to claim 1, characterized in that: The large-diameter part of the circular plug plate (9) is inserted and adapted to the large-diameter part of the pouring hole (701), and abuts against the inner circumferential wall of the large-diameter part of the pouring hole (701). The small-diameter part of the circular plug plate (9) is inserted and adapted to the small-diameter part of the pouring hole (701).

4. The centrifugal casting equipment for continuous fiber reinforced aluminum-based composite pipe according to claim 1, characterized in that: Two bushings (601) are symmetrically welded to the open end of the U-shaped sliding frame (6). The two bushings (601) are slidably cooperated with the two vertical track shafts (105) correspondingly. Two tightening bolts (602) are symmetrically installed through the two bushings (601) in a threaded manner. The head ends of the two tightening bolts (602) are correspondingly pressed and abutted against the two vertical track shafts (105); A locking bolt (603) is installed through the bottom of the middle section of the vertical side rod of the U-shaped sliding frame (6) in a threaded manner. The head end of the locking bolt (603) is pressed and abutted against the vertical pipe section of the L-shaped pouring pipe (5).

5. The centrifugal casting equipment for continuous fiber reinforced aluminum-based composite pipe according to claim 1, characterized in that: Two annular bearing seats (104) are symmetrically welded in the space between the two box walls (103). The cylindrical mold (4) is rotationally assembled with the two annular bearing seats (104) through bearings embedded in the two annular bearing seats (104); A circular through groove (1032) is provided through the center of the two box walls (103), and the head end of the cylindrical casting mold (4) is penetrated and matched with the circular through groove (1032) on the corresponding side; A fiber preform (10) with a cylindrical structure is inserted inside the cylindrical casting mold (4).

6. The centrifugal casting equipment for continuous fiber reinforced aluminum-based composite pipe according to claim 1, characterized in that: A power station (2) is fixedly mounted on the top of the base (1) outside the two box walls (103). The power station (2) includes a servo motor and a servo driver. The rotating shaft of the servo motor passes through the circular through slot (1032) on the corresponding side and is transmitted to the cylindrical casting (4) through a coupling.

7. The centrifugal casting equipment for continuous fiber reinforced aluminum-based composite pipe according to claim 1, characterized in that: A back plate is welded between the two vertical side edges of the two box walls (103); a long cover plate (1031) is welded to the top of the two box walls (103) and is sealed and connected to the back plate; a box cover (3) is rotatably mounted on one long side of the long cover plate (1031); the two box walls (103), the back plate, the long cover plate (1031) and the box cover (3) together form a complete protective box.

8. The centrifugal casting equipment for continuous fiber reinforced aluminum-based composite pipe according to claim 1, characterized in that: The outer circumference of the head end portion of the cylindrical casting mold (4) is provided with a thread, and a rotation drive assembly (8) is arranged on the portion, the rotation drive assembly (8) comprising a threaded collar (801) and a mounting ring (802) welded concentrically with the threaded collar (801), the threaded collar (801) being sleeved on the head end portion of the cylindrical casting mold (4) in the form of a threaded screw; The mounting ring (802) is provided with a rotating circle (803), the inner circumference of the rotating circle (803) is provided with an annular guide groove (8033), the cross section of the mounting ring (802) is a convex structure, and the convex portion thereof is rotatably matched with the annular guide groove (8033); A circle of longitudinal positioning shaft (8031) is welded on the side of the mounting ring (802) away from the threaded collar (801); a driving slip ring (805) is slidably sleeved on the circle of longitudinal positioning shaft (8031) in the form of spring push positioning; a square limit sleeve (8032) is welded on the head end of the circle of longitudinal positioning shaft (8031); a circle of stop rod (806) is slidably installed through the circle of square limit sleeve (8032); a circle of connecting rod (804) is rotatably connected between the tail end of the circle of stop rod (806) and the outer ring of the driving slip ring (805); and the circle of stop rod (806) is in abutment contact with the circular plug cover (7) in a top-pressing manner.

9. The centrifugal casting equipment for continuous fiber reinforced aluminum-based composite pipe according to claim 1, characterized in that: It also includes a pre-winding device, an aluminum liquid melting device, a preform preheating device and a cooling treatment device.

10. A centrifugal casting process for a continuous fiber reinforced aluminum-based composite material pipe, applied to the centrifugal casting equipment according to any one of claims 1 to 9, characterized in that: The steps include: ①, winding a fiber preform (10): winding PAN carbon fiber into a fiber preform (10) by a pre-winding device; the fiber winding spacing is 0.1 mm to 5 mm; ② Melting aluminum liquid: Melt the pure aluminum matrix at a temperature of 700-900°C through an aluminum liquid melting device, use argon gas for atmosphere protection during the melting process, and perform slag removal to obtain a molten liquid; ③. Preform preheating: inserting the fiber preform (10) obtained in step ① into the cylindrical casting mold (4) on the centrifugal casting device, and preheating it in an environment of 400-500° C. for 1 h to 2 h by a preform preheating device to obtain a preheated fiber preform (10); ④. Installing the fiber preform (10): The front end opening of the cylindrical casting mold (4) is sealed by a circular plug cover (7), and the fiber preform (10) obtained in step ③ is blocked and confined in the cylindrical casting mold (4); ⑤. Centrifugal casting: start the servo motor. When the speed of the servo motor reaches a predetermined range, pour the molten liquid obtained in step ② into the cylindrical casting mold (4) through the L-shaped pouring pipe (5). The servo motor drives the cylindrical casting mold (4) to rotate at a speed range of 1000 rpm to 6000 rpm and maintains the rotation speed for 0.1 to 30 minutes. During this process, the molten liquid is thrown toward the inner wall of the cylindrical casting mold (4) under the action of centrifugal force and is tightly combined with the fiber preform (10) to obtain a fiber-reinforced aluminum-based composite material; the volume fraction of the carbon fiber in the fiber-reinforced aluminum-based composite material is 10% to 40%; ⑥. Cooling treatment: cooling the fiber-reinforced aluminum-based composite material obtained in step ⑤ to room temperature by a cooling treatment device; ⑦. Unloading: The cooled fiber-reinforced aluminum-based composite material obtained in step ⑥ is extracted from the cylindrical casting mold (4), completing all the process flows.

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