CN114951702A - Ultrasonic-assisted coaxial composite material in-situ additive manufacturing device - Google Patents
Ultrasonic-assisted coaxial composite material in-situ additive manufacturing device Download PDFInfo
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- CN114951702A CN114951702A CN202210546290.4A CN202210546290A CN114951702A CN 114951702 A CN114951702 A CN 114951702A CN 202210546290 A CN202210546290 A CN 202210546290A CN 114951702 A CN114951702 A CN 114951702A
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- 239000002131 composite material Substances 0.000 title claims abstract description 63
- 239000000654 additive Substances 0.000 title claims abstract description 62
- 230000000996 additive effect Effects 0.000 title claims abstract description 62
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 48
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 33
- 239000013307 optical fiber Substances 0.000 claims abstract description 8
- 238000010438 heat treatment Methods 0.000 claims description 10
- 238000009413 insulation Methods 0.000 claims description 8
- 239000000126 substance Substances 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract 1
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- 238000000034 method Methods 0.000 description 11
- 238000000151 deposition Methods 0.000 description 8
- 230000008021 deposition Effects 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 230000006872 improvement Effects 0.000 description 4
- 239000000463 material Substances 0.000 description 4
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- 238000002604 ultrasonography Methods 0.000 description 4
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- 239000000835 fiber Substances 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000005054 agglomeration Methods 0.000 description 1
- 230000002776 aggregation Effects 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
- B22F12/50—Means for feeding of material, e.g. heads
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
- Moulding By Coating Moulds (AREA)
Abstract
The invention relates to an ultrasonic-assisted coaxial composite material in-situ additive manufacturing device, which comprises a composite material prepreg filament or tape reel, a prepreg conveying device, an ultrasonic amplitude transformer, a laser galvanometer system and an optical fiber transmission system, wherein the composite material prepreg filament or tape reel is arranged on the composite material prepreg conveying device; the prepreg conveying device is partially inserted into the cavity of the ultrasonic amplitude transformer and extends to the bottom end of the ultrasonic amplitude transformer, the output end of the prepreg conveying device is coaxial with the ultrasonic amplitude transformer, and a contact point of the bottom end of the ultrasonic amplitude transformer and the composite material additive blank is a major arc contact surface; one end of the optical fiber is connected with a laser galvanometer system, the laser galvanometer system is rotatably connected with the ultrasonic amplitude transformer and takes the axis of the ultrasonic amplitude transformer as a rotating shaft; the bottom end of the ultrasonic amplitude transformer is provided with a notch, and the output end of the laser galvanometer system is inserted into the notch. The ultrasonic-assisted coaxial composite material in-situ additive manufacturing device aims to solve the problem of poor interlayer bonding force in the conventional ultrasonic-assisted composite material additive manufacturing.
Description
Technical Field
The invention relates to the technical field of additive manufacturing, in particular to an ultrasonic-assisted coaxial composite material in-situ additive manufacturing device.
Background
As technology advances, composite fabrication has shifted from simple panel construction to integrated complex structural components, wherein, the composite material additive manufacturing is a novel technology which attracts attention due to the characteristics of the demould forming process and the capability of manufacturing complex structures, and with the progress of the composite additive and the auxiliary superposition coupling manufacturing process of different energy fields thereof, the performance of the composite additive manufacturing component is continuously improved, the application range of the method is continuously expanded, wherein the ultrasonic-assisted additive forming method is a more common method, fully utilizes the controllable mechanical vibration of the ultrasonic frequency to reduce the agglomeration of molecular chains, and promote the generation of more curing reaction probability among macromolecules, which is beneficial to the uniform spreading of raw materials and the improvement of the bonding force in the deposition direction, so that the process method is concerned by people.
In the existing additive manufacturing and forming process assisted by synchronous rolling or ultrasonic vibration, prepreg of resin or resin fiber is laterally fed, which increases the difficulty of path planning and reduces the forming precision, so that the change of the raw material feeding mode is of great importance to the improvement of the forming freedom of additive manufacturing and forming of the composite material.
Accordingly, the inventors provide an ultrasound-assisted coaxial composite in-situ additive manufacturing apparatus.
Disclosure of Invention
(1) Technical problem to be solved
The embodiment of the invention provides an ultrasonic-assisted coaxial composite material in-situ additive manufacturing device, which solves the technical problem of poor freedom degree in conventional ultrasonic-assisted composite material additive manufacturing.
(2) Technical scheme
The invention provides an ultrasonic-assisted coaxial composite material in-situ additive manufacturing device, which comprises a prepreg disc, a prepreg conveying device, an ultrasonic amplitude transformer and a laser galvanometer system, wherein the prepreg conveying device is arranged on the prepreg disc; wherein the content of the first and second substances,
the prepreg conveying device is partially inserted into the cavity of the ultrasonic amplitude transformer and extends to the bottom end of the ultrasonic amplitude transformer, the output end of the prepreg conveying device is coaxially arranged with the ultrasonic amplitude transformer, the prepreg tray is used for conveying prepreg into the prepreg conveying device, and the contact point of the bottom end of the ultrasonic amplitude transformer and the composite material additive forming blank is a major arc contact surface;
one end of the optical fiber is connected with the laser galvanometer system, the laser galvanometer system is rotatably connected with the ultrasonic amplitude transformer and takes the axis of the ultrasonic amplitude transformer as a rotating shaft;
the bottom end of the ultrasonic amplitude transformer is provided with a notch, and the output end of the laser galvanometer system is inserted into the notch.
Furthermore, the ultrasonic-assisted coaxial composite material in-situ additive manufacturing device further comprises a rotating device, one end of the rotating device is rotatably sleeved on the ultrasonic amplitude transformer, and the other end of the rotating device is connected to the laser galvanometer system.
Further, the ultrasonic-assisted coaxial composite material in-situ additive manufacturing device further comprises a heat insulation layer, and the heat insulation layer is filled at the contact position of the prepreg conveying device and the outer wall of the ultrasonic amplitude transformer.
Further, the ultrasonic-assisted coaxial composite material in-situ additive manufacturing device further comprises a guide device, wherein the guide device is sleeved on the prepreg conveying device and is used for enabling the axis of the prepreg fed into the ultrasonic amplitude transformer to coincide with the axis of the ultrasonic amplitude transformer.
Further, an angle formed by a connecting line between two sides of the notch and the axis of the ultrasonic amplitude transformer is smaller than 90 degrees.
Further, the bottom end of the ultrasonic amplitude transformer is provided with a plurality of vibration rollers, and the vibration rollers are used for contacting and compacting the composite material additive forming blank.
Furthermore, the bottom end of the ultrasonic amplitude transformer is provided with three vibration rollers, wherein one main vibration roller and the other two side vibration rollers are arranged in parallel.
The embodiment of the invention also provides another ultrasonic-assisted coaxial composite material in-situ additive manufacturing device, which comprises a prepreg tray, a prepreg conveying device, an ultrasonic amplitude transformer and an annular heating block, wherein the prepreg conveying device is arranged on the prepreg tray; the prepreg conveying device is partially inserted into the cavity of the ultrasonic amplitude transformer and extends to the bottom end of the ultrasonic amplitude transformer, the output end of the prepreg conveying device is coaxial with the ultrasonic amplitude transformer, the prepreg tray is used for conveying prepreg into the prepreg conveying device, and the annular heating block is arranged at the bottom end of the ultrasonic amplitude transformer and surrounds the prepreg.
Further, the bottom end of the ultrasonic amplitude transformer is provided with a plurality of vibration rollers, and the vibration rollers are used for being in contact with the composite material additive forming blank and performing high-frequency compaction.
Furthermore, four vibration rollers are arranged at the bottom end of the ultrasonic amplitude transformer, two main vibration rollers are symmetrically arranged on two sides of the prepreg, and the other two lateral vibration rollers are symmetrically arranged on two sides of the prepreg.
(3) Advantageous effects
In conclusion, the invention realizes the additive manufacturing of the coaxial prepreg low-glass-state high-quality laminated structure by changing the ultrasonic assistance and the prepreg input form, is beneficial to accurately executing a planned path, and provides a reliable equipment foundation for the additive manufacturing of the composite material with a complex structure. The existing composite additive forming mode is innovated, the forming quality, the manufacturing precision and the efficiency are improved, the performance control is strictly controlled, and the manufacturing cost and the production period are greatly reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a front view of an ultrasonic-assisted coaxial composite in-situ additive manufacturing apparatus according to an embodiment of the present invention;
fig. 2 is a left side view of an ultrasonic-assisted coaxial composite in-situ additive manufacturing apparatus provided in an embodiment of the present invention;
fig. 3 is a cross-sectional view of an ultrasonic-assisted coaxial composite in-situ additive manufacturing apparatus provided by an embodiment of the present invention;
fig. 4 is a bottom view of an ultrasonic-assisted coaxial composite in-situ additive manufacturing apparatus according to an embodiment of the present invention;
fig. 5 is a bottom view of another ultrasonic-assisted coaxial composite in-situ additive manufacturing apparatus provided by an embodiment of the invention.
In the figure:
1-the main axis of the ultrasonically assisted forming head; 2-a rotating device; 3-prepreg; 4-a prepreg tray; 5-prepreg conveying device; 6-ultrasonic amplitude transformer; 601-opening; 701-a main vibration roller; 702-laterally vibrating rollers; 8-composite forming a substrate; 9-forming a blank by using a composite material additive; 10-the lower end of the main axis of the ultrasonic auxiliary forming head; 11-galvanometer laser melting point; 12-a galvanometer; 13-a laser galvanometer system; 14-an optical fiber; 15-a thermal insulation layer; 16-a guide; 17-ring heating block; 18-laser speckle.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following detailed description of the embodiments and the accompanying drawings are provided to illustrate the principles of the invention and are not intended to limit the scope of the invention, i.e., the invention is not limited to the embodiments described, but covers any modifications, alterations, and improvements in the parts, components, and connections without departing from the spirit of the invention.
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.
Fig. 1 is a schematic structural diagram of an ultrasonic-assisted coaxial composite in-situ additive manufacturing apparatus provided in an embodiment of the present invention, including a prepreg tray 4, a prepreg conveying device 5, an ultrasonic horn 6, a laser galvanometer system 13, and an optical fiber 14; wherein the content of the first and second substances,
the prepreg conveying device 5 is partially inserted into the cavity of the ultrasonic amplitude transformer 6 and extends to the bottom end of the ultrasonic amplitude transformer 6, the output end of the prepreg conveying device 5 is coaxially arranged with the ultrasonic amplitude transformer 6, the prepreg disc 4 is used for conveying the prepreg 3 into the prepreg conveying device 5, and the contact point of the bottom end of the ultrasonic amplitude transformer 6 and the composite additive forming blank 9 is a major arc contact surface;
one end of the optical fiber 14 is connected with a laser galvanometer system 13, the laser galvanometer system 13 is rotatably connected with the ultrasonic horn 6, and the axis of the ultrasonic horn 6 is taken as a rotating shaft;
the bottom end of the ultrasonic amplitude transformer 6 is provided with a notch 601, and the output end of the laser galvanometer system 13 is inserted into the notch 601.
In the above embodiment, the prepreg 3 is fed into the prepreg feeding device 5 onto the ultrasonic processing head so that the feeding axis coincides with the central axis of the ultrasonic processing head; the existing laser-assisted forming method is changed by laterally grooving the ultrasonic amplitude transformer 6, laser is directly irradiated to the contact position of a deposition point and a blank, and the effect of coaxial deposition is optimized; by improving the ultrasonic amplitude transformer 6, the contact point of the ultrasonic amplitude transformer 6 and the composite material additive forming blank 9 is expanded into a major arc contact surface, and a pressure contact surface is increased; the ultrasonic horn 6 is typically the ultrasonic output point of the ultrasonic processing apparatus, and its length and wavelength are matched; coaxial ultrasound can achieve high-quality laminated additive forming of low-glass-state layers.
Wherein, the prepreg 3 is fed into a prepreg conveying device 5 and inserted into an ultrasonic amplitude transformer 6, and the clearance fit within 0.05mm is kept.
In some optional embodiments, as shown in fig. 1, the ultrasound-assisted coaxial composite in-situ additive manufacturing apparatus further includes a rotating device 2, one end of the rotating device 2 is rotatably sleeved on the ultrasonic horn 6, and the other end of the rotating device 2 is connected to the laser galvanometer system 13.
Specifically, the existing laser auxiliary forming method is changed by means of lateral grooving on the ultrasonic amplitude transformer 6, laser is directly irradiated to a contact position of a deposition point and a blank, the coaxial deposition effect is optimized, and meanwhile, the laser galvanometer system 13 rotates along the main axis 1 of the ultrasonic auxiliary forming head along with the requirement of a material increase path, so that good quick heating effect of laser swing on the prepreg 3 and the composite material increase forming blank 9 of the prepreg is guaranteed.
The galvanometer 12 in the laser galvanometer system 13 is inserted into the notch 601, and the prepreg 3 and the composite material additive forming blank 9 are heated at the laser melting point of the galvanometer.
Wherein the composite material additive forming blank 9 is laid on the composite material forming substrate 8.
In some alternative embodiments, as shown in fig. 3, the ultrasonic-assisted coaxial composite in-situ additive manufacturing apparatus further comprises a thermal insulation layer 15, and the thermal insulation layer 15 is filled at the contact position of the prepreg conveying device 5 and the outer wall of the ultrasonic horn 6.
The insulating layer 15 may be made of a rubber flexible insulating material, and is used for supporting the prepreg conveying device 5 and insulating the ultrasonic horn 6.
In some alternative embodiments, as shown in fig. 3, the ultrasonic-assisted coaxial composite in-situ additive manufacturing apparatus further comprises a guiding device 16, wherein the guiding device 16 is sleeved on the prepreg conveying device 5 and is used for enabling the axis of the prepreg 3 fed into the ultrasonic amplitude transformer 6 to be coincident with the axis of the ultrasonic amplitude transformer 6.
Specifically, the guide 16 may have a tube with lubrication characteristics as its trunk portion and be fixed inside the ultrasonic horn 6 by an elastic medium.
In some alternative embodiments, as shown in figure 4, the line between the sides of the break 601 and the axis of the ultrasound horn 6 forms an angle of less than 90 °. Wherein, because the galvanometer laser swings back and forth, a space is left for swinging, and the problem of insufficient compaction can occur when the angle is larger than 90 degrees.
Specifically, the laser spot 18 partially overlaps the filament of the prepreg 3, thereby achieving heating of the prepreg 3.
In some alternative embodiments, the bottom end of the ultrasonic horn 6 is provided with a plurality of vibrating rollers for contacting and compacting the composite additive forming billet 9.
In some alternative embodiments, as shown in FIG. 4, the bottom end of the ultrasonic horn 6 is provided with three vibrating rollers, wherein one main vibrating roller 701 is disposed in parallel with the other two lateral vibrating rollers 702.
Specifically, the main vibration roller 701 and the lateral vibration roller 702 axial offset distance between two adjacent endsδGreater than or equal to 1/2 for prepreg 3 wire diameter. The axial misalignment is to ensure the integrity of the compacted lap joint, ensure that there are no regions that are not compacted, and, again, to facilitate the arrangement of three vibrating rollers. The length of the dislocation distance is set for preventing the prepreg wire materials from being rolled into the vibration roller.
Fig. 5 is a schematic structural diagram of another ultrasonic-assisted coaxial composite in-situ additive manufacturing apparatus provided by the embodiment of the present invention, which includes a prepreg tray 4, a prepreg conveying device 5, an ultrasonic horn 6, and an annular heating block 17; the prepreg conveying device 5 is partially inserted into the cavity of the ultrasonic horn 6 and extends to the bottom end of the ultrasonic horn 6, the output end of the prepreg conveying device 5 is coaxial with the ultrasonic horn 6, the prepreg tray 4 is used for conveying the prepreg 3 into the prepreg conveying device 5, and the annular heating block 17 is arranged at the bottom end of the ultrasonic horn 6 and surrounds the prepreg 3.
In some alternative embodiments, the bottom end of the ultrasonic horn 6 is provided with a plurality of vibrating rollers for contacting and compacting the composite additive forming billet 9.
In some alternative embodiments, as shown in fig. 5, the bottom end of the ultrasonic horn 6 is provided with four vibrating rollers, wherein two main vibrating rollers 701 are symmetrically arranged on both sides of the prepreg 3, and the other two lateral vibrating rollers 702 are symmetrically arranged on both sides of the prepreg 3.
Examples
Taking a cylinder body with the forming diameter of 100mm and the height of 10mm as an example, the prepreg is a carbon fiber resin-based composite material, the width of the prepreg is 5mm, the thickness of a strip is 0.5mm, the prepreg is arranged on an ultrasonic processing head through a prepreg feeding device, the width of the outer wall of a conveying device is 6.5mm, the height of the conveying device is 2mm, the width of the prepreg is 10.5mm and the height of the prepreg is 6mm in the lateral direction of an ultrasonic amplitude transformer, the prepreg conveying device is inserted into a cavity of the ultrasonic amplitude transformer, the contact end is 2mm up and down, and the rubber material with the width of 2mm is used for heat insulation and shock absorption, so that the axis of the fed prepreg coincides with the axis of the ultrasonic processing head. The prepreg conveying device is inserted into the ultrasonic amplitude transformer and keeps clearance fit within 0.05 mm.
In the additive manufacturing process, a groove is formed in the ultrasonic amplitude transformer in the lateral direction, the laser of the vibrating mirror directly irradiates the contact position of a deposition point and a blank, the forming speed is 10mm/s, the laser vibrating mirror system can rotate along the main axis of the ultrasonic auxiliary forming head along with the requirement of an additive path, and the rotating speed is 11.5 degrees/s, so that the good quick heating effect of laser swing on the prepreg and the blank is ensured. And (3) continuously depositing, namely finishing deposition after the forming height is guided to reach 10mm, increasing the ultrasonic power, and changing the amplitude of the ultrasonic amplitude transformer so as to achieve the purpose of cutting fibers, thereby finishing the implementation of the ultrasonic-assisted coaxial composite material in-situ additive manufacturing process.
It should be clear that the embodiments in this specification are described in a progressive manner, and the same or similar parts in the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The present invention is not limited to the specific steps and structures described above and shown in the drawings. Also, a detailed description of known process techniques is omitted herein for the sake of brevity.
The above description is only an example of the present application and is not intended to limit the present application. Various modifications and alterations to this application will become apparent to those skilled in the art without departing from the scope of this invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. An ultrasonic-assisted in-situ additive manufacturing device for coaxial composite materials is characterized by comprising a prepreg filament or tape reel (4), a composite material prepreg conveying device (5), an ultrasonic amplitude transformer (6), a laser galvanometer system (13) and an optical fiber (14); wherein the content of the first and second substances,
the composite material prepreg conveying device (5) is partially inserted into the cavity of the ultrasonic amplitude transformer (6) and extends to the bottom end of the ultrasonic amplitude transformer (6), the output end of the prepreg conveying device (5) is coaxially arranged with the ultrasonic amplitude transformer (6), the prepreg disc (4) is used for conveying the prepreg (3) into the prepreg conveying device (5), and the contact point of the bottom end of the ultrasonic amplitude transformer (6) and the composite material additive forming blank (9) is a major arc contact surface;
one end of the optical fiber (14) is connected with the laser galvanometer system (13), and the laser galvanometer system (13) is rotatably connected with the ultrasonic amplitude transformer (6) and takes the axial line of the ultrasonic amplitude transformer (6) as a rotating shaft;
the bottom end of the ultrasonic amplitude transformer (6) is provided with a notch (601), and the output end of the laser galvanometer system (13) is inserted into the notch (601).
2. The ultrasonic-assisted coaxial composite in-situ additive manufacturing device according to claim 1, further comprising a rotating device (2), wherein one end of the rotating device (2) is rotatably sleeved on the ultrasonic horn (6), and the other end of the rotating device (2) is connected to the laser galvanometer system (13).
3. The ultrasonic-assisted coaxial composite in-situ additive manufacturing device according to claim 1, further comprising a thermal insulation layer (15), wherein the thermal insulation layer (15) is filled at a contact position of the prepreg conveying device (5) and the outer wall of the ultrasonic horn (6).
4. The ultrasonic-assisted coaxial composite in-situ additive manufacturing device according to claim 1, further comprising a guiding device (16), wherein the guiding device (16) is sleeved on the prepreg conveying device (5) and is used for enabling the axis of the prepreg (3) fed into the ultrasonic horn (6) to be coincident with the axis of the ultrasonic horn (6).
5. The ultrasonic-assisted coaxial composite in-situ additive manufacturing device according to claim 1, wherein a line connecting both sides of the gap (601) and an axis of the ultrasonic horn (6) forms an angle smaller than 90 °.
6. The ultrasonic-assisted coaxial composite in-situ additive manufacturing device according to claim 1, wherein the bottom end of the ultrasonic horn (6) is provided with a plurality of vibrating rollers for contacting and high frequency compacting of the composite additive forming blank (9).
7. The ultrasonic-assisted coaxial composite in-situ additive manufacturing device according to claim 6, wherein the bottom end of the ultrasonic horn (6) is provided with three vibrating rollers, wherein one main vibrating roller is arranged in parallel with the other two lateral vibrating rollers.
8. An ultrasonic-assisted in-situ additive manufacturing device for coaxial composite materials is characterized by comprising a prepreg disc (4), a prepreg conveying device (5), an ultrasonic amplitude transformer (6) and an annular heating block (17); the prepreg conveying device (5) is partially inserted into a cavity of the ultrasonic amplitude transformer (6) and extends to the bottom end of the ultrasonic amplitude transformer (6), the output end of the prepreg conveying device (5) and the ultrasonic amplitude transformer (6) are coaxially arranged, the prepreg disc (4) is used for conveying the prepreg (3) into the prepreg conveying device (5), and the annular heating block (17) is arranged at the bottom end of the ultrasonic amplitude transformer (6) and surrounds the prepreg (3).
9. The ultrasonic-assisted coaxial composite in-situ additive manufacturing device according to claim 8, wherein the bottom end of the ultrasonic horn (6) is provided with a plurality of vibrating rollers for contacting and high frequency compacting of the composite additive forming blank (9).
10. The ultrasonic-assisted coaxial composite in-situ additive manufacturing device according to claim 9, wherein the bottom end of the ultrasonic horn (6) is provided with four vibration rollers, two main vibration rollers are symmetrically arranged on two sides of the prepreg (3), and the other two lateral vibration rollers are symmetrically arranged on two sides of the prepreg (3).
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