Composite precise repairing equipment for metal component

Abstract

The invention provides composite precise repairing equipment for a metal component, and relates to the field of metal component repairing. The composite precise repairing equipment for the metal component comprises a base tool used for being installed on a machining center workbench, and further comprises a displacement clamp, an X-axis, Y-axis and Z-axis assembly, a laser-arc composite assembly and a coaxial powder blowing assembly, and the displacement clamp is installed on the base tool and used for achieving swinging and rotating of a workpiece; the XYZ-axis assembly is installed on the base tool, and the laser arc composite assembly is installed on the XYZ-axis assembly and used for moving along the X axis, the Y axis and the Z axis. According to the composite precise repairing equipment for the metal component, the machining freedom degree can be freely switched even in the face of cavitation and recesses in complex shapes, when a thin-wall workpiece is repaired, excessive profiles do not need to be cut off through a traditional tool, the laser arc composite assembly and the laser arc composite assembly are combined, high efficiency and high quality are achieved, and layer-by-layer stacking machining is achieved; and the original profile performance can be better recovered.

Description

Technical Field

[0001] This invention relates to the field of metal component repair, specifically to a composite precision repair device for metal components. Background Technology

[0002] With the continuous development of manufacturing technology, traditional processing methods can no longer fully meet the requirements of modern industry for the efficient repair of complex and precision structural components. In high-end equipment manufacturing fields such as aerospace, automotive, mold manufacturing, and shipbuilding, metallic materials often exhibit structural defects such as cracks, porosity, and wear during use. These defects not only affect the mechanical properties of structural components but may also lead to equipment malfunctions and safety hazards. Therefore, how to effectively and quickly repair these defects has become a critical issue that urgently needs to be addressed in the manufacturing industry.

[0003] Repair techniques for defects in metal structures mainly include welding repair and additive manufacturing repair. However, these methods generally suffer from drawbacks such as unstable repair processes, large heat-affected zones, and difficulties in material matching, making it difficult to meet high requirements for precision and efficiency. The applicability and effectiveness of traditional repair techniques are even more limited for high-performance, thin-walled, or complex-shaped workpieces.

[0004] Current repair technologies can achieve performance levels that meet or even exceed those of the substrate. High-performance powders are generally used for powder additive repair, which is an advanced technology that uses a high-energy beam (laser / electron beam / plasma arc, etc.) as a heat source to melt synchronously transported metal powder and clad it layer by layer on the damaged component substrate to restore its geometry, size, and performance.

[0005] However, powder additive repair using a single process and heat source is prone to instability in the repair process and inability to control the heat stably, which can easily damage the original profile. Furthermore, it is difficult for gas to escape during the powder accumulation process, which can easily lead to porosity and thermal stress. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a composite precision repair device for metal components, which solves the problems mentioned in the background section.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a precision composite repair device for metal components, comprising a base fixture for mounting on a machining center worktable, and further comprising a displacement fixture, an XYZ axis assembly, a laser-arc composite assembly, and a coaxial powder blowing assembly. The displacement fixture is mounted on the base fixture to enable the workpiece to swing and rotate; the XYZ axis assembly is mounted on the base fixture, the laser-arc composite assembly is mounted on the XYZ axis assembly to enable movement along the X, Y, and Z axes, and the coaxial powder blowing assembly is mounted on the laser-arc composite assembly to achieve coaxiality with the arc, and to coaxially blow composite metal powder into the molten pool during arc cladding.

[0008] Preferably, it also includes a dual-axis assembly mounted on the output shaft of the XYZ axis assembly, and the laser-arc composite assembly mounted on the output shaft of the dual-axis assembly. The dual-axis assembly is used to enable the laser-arc composite assembly to oscillate and rotate.

[0009] Preferably, the displacement fixture includes a base platform, a middle platform, and a top platform. The base platform is fixedly mounted on the base fixture. Two sets of arc-shaped guide rails are fixedly mounted on the bottom surface of the middle platform. The arc-shaped guide rails are inserted in the upper part of the base platform and can slide relative to each other. A worm gear mechanism is also provided between the two, which can realize the middle platform changing its angle relative to the base platform according to the arc-shaped guide rails. A servo pressure shaft is installed between the top platform and the middle platform to realize the rotation of the top platform relative to the middle platform.

[0010] Preferably, the laser-arc composite assembly includes an arc mechanism and a laser mechanism. The arc mechanism is installed on the output end of the dual-axis assembly with its arc generating end facing the top platform. The laser mechanism is installed on one side of the arc mechanism using a servo rotation mechanism for switching between laser-guided arc and laser cladding.

[0011] Preferably, the laser-arc composite assembly further includes an ultrasonic transmitter, which is fixed to one side of the arc mechanism, and the ultrasonic transmitter is used to emit ultrasonic waves to the molten pool.

[0012] Preferably, the coaxial powder blowing assembly includes a receiving pipe, a powder reversing container, and a supply pipe. The powder reversing container is sealed on the outer side of the upper end of the arc mechanism and forms a closed, annular powder flow cavity with the end body of the arc mechanism. The receiving pipe is an annular conical pipe and is coaxially covered outside the arc emitting tip of the arc mechanism. The receiving pipe is installed at the bottom of the powder reversing container. A through groove is provided at the connection between the powder reversing container and the receiving pipe to connect the internal cavity of the receiving pipe and the powder flow cavity. The supply pipe is installed on one side of the powder reversing container and is tangent to the powder flow cavity.

[0013] Preferably, the coaxial powder blowing assembly further includes a spiral blade, which is disposed in the powder flow cavity and fixed to the end body of the electric arc mechanism. The end of the spiral blade is not in contact with the inner wall structure of the powder flow cavity, and a spiral channel is formed between the two.

[0014] Preferably, the worm gear mechanism includes a worm gear assembly installed at the center of the bottom surface of the intermediate platform and an electric worm installed in the base platform, wherein the electric worm meshes with the worm gear assembly.

[0015] Preferably, a fixing fixture is installed on the top platform for adaptively fixing the workpiece to be repaired.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. This precision composite repair equipment for metal components, by setting up a dual-axis assembly and a displacement fixture, enables the laser-arc composite assembly and the workpiece to have the freedom of rotation and oscillation. In particular, the laser-arc composite assembly can also move along the XYZ axis. Thus, in actual arc cladding additive repair, even when facing complex shapes of cavitation and depressions, the processing freedom can be switched freely. When repairing thin-walled workpieces, it is not necessary to use traditional tools to remove too much profile, resulting in higher repair accuracy.

[0017] 2. This composite precision repair equipment for metal components uses a laser-arc composite component. The laser stabilizes the arc, increasing the melting depth, while the arc improves the deposition efficiency. The combination of the two results in both high efficiency and high quality. In particular, after cladding a layer of metal powder, the cladding is stopped, and the surface is repaired by laser. Then, another layer is cladding, and the process is carried out layer by layer, which can better restore the original performance of the profile.

[0018] 3. This composite precision repair equipment for metal components, by setting up a coaxial powder blowing component, can follow the movement of the electric arc, resulting in higher processing accuracy. Especially when facing complex defect locations, it can follow the cladding at all times, and the rotating downward metal powder can better fit into the molten pool, making it less prone to porosity.

[0019] 4. This composite precision repair equipment for metal components can emit ultrasonic waves into the molten pool by setting an ultrasonic transmitter. During the stacking and cladding process, the ultrasonic waves can be used to release the gas in the molten pool, thus preventing the formation of pores or gaps in the repair area. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a front view of the structure of the present invention; Figure 3 This is a schematic diagram of the structure of the displacement fixture of the present invention; Figure 4 This is a cross-sectional view of the displacement fixture of the present invention; Figure 5 For the present invention Figure 4 Enlarged view of the structure at point A in the middle; Figure 6 This is a schematic diagram of the internal structure of the displacement fixture of the present invention; Figure 7 This is a side view of the structure of the present invention; Figure 8 This is a schematic diagram of the XYZ axis assembly of the present invention; Figure 9 This is a schematic diagram of the structure of the laser-arc composite component of the present invention. Figure 1 ; Figure 10 This is a schematic diagram of the structure of the laser-arc composite component of the present invention. Figure 2 ; Figure 11 This is a structural separation diagram of the laser-arc composite component and the coaxial powder blowing component of the present invention.

[0021] In the diagram: 1. Base fixture; 2. Positioning fixture; 201. Base platform; 202. Intermediate platform; 203. Top platform; 204. Arc-shaped guide rail; 205. Worm gear mechanism; 2051. Worm gear assembly; 2052. Electric worm gear; 206. Servo pressure shaft; 207. Fixture; 3. XYZ axis assembly; 4. Laser-arc composite assembly; 401. Arc mechanism; 402. Laser mechanism; 403. Ultrasonic transmitter; 5. Coaxial powder blowing assembly; 501. Gathering pipeline; 502. Powder reversing container; 503. Supply pipeline; 504. Through groove; 505. Powder flow chamber; 506. Spiral blade; 507. Spiral channel; 6. Dual-axis assembly. Detailed Implementation

[0022] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0023] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0024] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0025] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0026] like Figure 1-11 As shown, a composite precision repair device for metal components includes a base fixture 1 for mounting on a machining center workbench, and also includes a displacement fixture 2, an XYZ axis assembly 3, a laser-arc composite assembly 4, and a coaxial powder blowing assembly 5. The displacement fixture 2 is mounted on the base fixture 1 to enable the workpiece to swing and rotate; the XYZ axis assembly 3 is mounted on the base fixture 1, and the laser-arc composite assembly 4 is mounted on the XYZ axis assembly 3 to enable movement along the X, Y, and Z axes; the coaxial powder blowing assembly 5 is mounted on the laser-arc composite assembly 4 to achieve coaxiality with the arc and to coaxially blow composite metal powder into the molten pool during arc cladding.

[0027] The base fixture 1 is mounted on the worktable of a machining center in the prior art using a clamp, or on the worktable of a CNC vertical milling machine. After the workpiece is repaired, a milling machine or machining center can be used to finish the repaired surface. Alternatively, before the initial repair, a milling cutter can be used to perform preliminary treatment on the damaged area of ​​the workpiece, such as by machining or grinding, to completely remove defects such as fatigue layers and cracks, forming a clean and regular area to be repaired.

[0028] During repair, the workpiece is directly mounted on the displacement fixture 2, which has an additional fixture between it and the worktable of the machining center or milling machine, allowing for greater freedom of movement during CNC repair.

[0029] XYZ axis assembly 3 is a precision track in three directions, in which an electric lead screw and a roller slider are installed, with the roller slider cooperating with the electric lead screw.

[0030] In an optional embodiment, a dual-axis assembly 6 is further included, which is mounted on the output shaft of the XYZ axis assembly 3. The laser-arc composite assembly 4 is mounted on the output shaft of the dual-axis assembly 6. The dual-axis assembly 6 is used to enable the laser-arc composite assembly 4 to swing and rotate.

[0031] In this embodiment, the dual-axis assembly 6 includes a servo rotary axis and a swing axis, which are mounted on the XYZ axis assembly 3. It not only has XYZ direction movement, but also has two degrees of freedom: rotation and swing. This allows the installed laser arc composite assembly 4 to better adapt to the shape of the defect location, the curvature of the cavitation hole, etc., when processing defects. In the repair area where it is impossible to use a milling machine to pre-process into a regular hole, the laser cladding assembly needs to have extremely high degrees of freedom.

[0032] In an optional embodiment, the displacement fixture 2 includes a base 201, an intermediate platform 202, and a top platform 203. The base 201 is fixedly mounted on the base fixture 1. Two sets of arc-shaped guide rails 204 are fixedly mounted on the bottom surface of the intermediate platform 202. The arc-shaped guide rails 204 are inserted into the upper end of the base 201 and can slide relative to each other. A worm gear mechanism 205 is also provided between the two, which can realize the intermediate platform 202 changing its angle relative to the base 201 according to the arc-shaped guide rails 204. A servo pressure shaft 206 is installed between the top platform 203 and the intermediate platform 202 to realize the rotation of the top platform 203 relative to the intermediate platform 202.

[0033] In this embodiment, the base platform 201 is bolted to the base fixture 1. The arc-shaped guide rail 204 of the intermediate platform 202 is also provided with rollers between it and the base platform 201. The rollers and the arc-shaped channel combine to form an active space for the arc-shaped guide rail 204. Machine tool lubricating oil needs to be applied to the active space regularly to achieve precise angle changes. The worm gear mechanism 205 is driven by a servo motor to precisely control the angle changes of the intermediate platform 202. The servo pressure shaft 206 is a rotating shaft with a radial pressure bearing installed inside. It is also equipped with a servo motor, gears, etc. The servo motor is used to drive the top platform 203 to rotate precisely relative to the intermediate platform 202 according to the radial pressure bearing.

[0034] In an optional embodiment, the laser-arc composite assembly 4 includes an arc mechanism 401 and a laser mechanism 402. The arc mechanism 401 is mounted on the output end of the dual-axis assembly 6, with its arc generating end facing the top platform 203. The laser mechanism 402 is mounted on one side of the arc mechanism 401 using a servo rotation mechanism for switching between laser-guided arc and laser cladding.

[0035] In this embodiment, the arc mechanism 401 is a TIG welding machine, which has a stable arc and more precise control over heat and molten pool, making it suitable for high-quality, highly reactive materials. The laser component is a fiber laser, which can be focused to a very small spot (high power density) and act precisely on the workpiece. The angle of the laser mechanism 402 is adjustable and can be used to stabilize the arc or act on the molten pool. The laser alone can be used for cladding, and the laser combined with the arc can also achieve cladding. After the arc claddings a layer, the laser can be used to trim the surface of the cladding layer.

[0036] In an optional embodiment, the laser-arc composite assembly 4 further includes an ultrasonic transmitter 403 fixed to one side of the arc mechanism 401, the ultrasonic transmitter 403 being used to emit ultrasonic waves to the molten pool.

[0037] In this embodiment, the ultrasonic transmitter 403 simultaneously applies ultrasonic waves or an electromagnetic field during laser cladding or arc cladding to refine the grains: the cavitation and acoustic flow effects of ultrasound can break down dendrites and refine the microstructure of the repair area. It also reduces defects by promoting gas escape, reducing porosity, and stirring the molten pool to make the composition more uniform. Finally, it reduces residual stress by helping to alleviate thermal stress.

[0038] In an optional embodiment, the coaxial powder blowing assembly 5 includes a receiving pipe 501, a powder reversing container 502, and a supply pipe 503. The powder reversing container 502 is sealed on the outer side of the upper end of the arc mechanism 401 and forms a closed, annular powder flow cavity 505 with the end body of the arc mechanism 401. The receiving pipe 501 is an annular conical pipe and is coaxially covered outside the arc emitting tip of the arc mechanism 401. The receiving pipe 501 is installed at the bottom of the powder reversing container 502. A through groove 504 is provided at the connection between the powder reversing container 502 and the receiving pipe 501 to connect the internal cavity of the receiving pipe 501 and the powder flow cavity 505. The supply pipe 503 is installed on one side of the powder reversing container 502 and is tangent to the powder flow cavity 505.

[0039] In this embodiment, the powder blowing end of the converging pipe 501 is a converging end, which can concentrate metal powder and supply pipe 503 to blow powder into powder reversing container 502. The powder flow cavity 505 is used to concentrate and gather powder. During arc cladding, powder can be continuously blown into the arc and molten pool. The powder blowing is uniform, and combined with the arc, precision cladding can be achieved.

[0040] In an optional embodiment, the coaxial powder blowing assembly 5 further includes a helical blade 506, which is disposed in the powder flow cavity 505 and fixed to the end body of the arc mechanism 401. The end of the helical blade 506 is not in contact with the inner wall structure of the powder flow cavity 505, and a helical channel 507 is formed between them.

[0041] In this embodiment, the spiral blade 506 is used for rotating powder blowing. The powder density is low at the beginning of the blowing process. After the spiral blade 506 rotates, the powder is gathered into the collection channel 501, and the density of the metal powder in the collection channel 501 becomes higher.

[0042] In an optional embodiment, the worm gear mechanism 205 includes a worm gear assembly 2051 mounted at the center of the bottom surface of the intermediate platform 202, and an electric worm 2052 mounted in the base platform 201, the electric worm 2052 meshing with the worm gear assembly 2051.

[0043] In this embodiment, the electric worm gear 2052 is driven by a servo motor, and the electric worm gear 2052 can rotate the turbine assembly by meshing with the turbine assembly.

[0044] In an optional embodiment, a fixing clamp 207 is mounted on the top platform 203 for adaptively fixing the workpiece to be repaired.

[0045] In this embodiment, the fixing fixture 207 can be customized, and it needs to be able to not only fix traditional molds, but also fix tubular workpieces and thin-walled workpieces.

[0046] In use, first, fix the base fixture 1 to the machine tool's worktable using bolts and clamps. Then, fix the workpiece to the top platform 203. The fixing method of the top platform 203 can be customized. After fixing the top platform 203, determine the repair steps and repair route. If the workpiece to be repaired is a thick mold, a CNC milling machine can be used to perform preliminary treatment on the cavitation or pits on the workpiece. The preliminary treatment can remove the oxide layer on the surface of the cavitation or pits. Then, use a laser arc to heat the pits to form a molten pool. Simultaneously, the powder is melted by the arc. Then, it is clad layer by layer on the damaged part substrate. During the process of powder melting to form a deposit layer, the ultrasonic transmitter 403 simultaneously emits ultrasonic waves to remove the internal gas of the molten layer. After the gas escapes, With fewer internal pores and a denser build-up layer, after one layer is built up, the arc is shut off, and a precisely controlled laser is used to treat the surface of the build-up layer. The heat from the laser is easily controlled, allowing for further surface removal of the cladding layer. This surface removal makes the cladding layer smoother. After treating one cladding layer, a laser-stabilized arc is used again for powder blowing. Following the initial cross-sectional analysis, damaged areas with cavitation and pitting are layered and built up using an additive-subtractive-additive-subtractive process. This results in a higher density of build-up. Finally, after being built up to the workpiece surface, the repair layer is milled, ground, and polished to achieve the required dimensions and surface finish. Heat treatment is then performed to restore or optimize the performance of the repaired area and heat-affected zone. Non-destructive testing (such as penetrant testing, ultrasonic testing, and X-ray testing) is conducted to ensure the quality of the repair.

[0047] If the workpiece to be repaired is relatively thin, it is not suitable to use a milling cutter to treat the pit in the early stage. Instead, the surface of the pit is heated directly by a laser to remove the dirt on the surface of the pit. Precise control of the laser heat can avoid damaging the thin workpiece. Then, the laser arc composite component 4 is used for powder cladding, which is the same as the above process. After the preliminary slicing analysis, the cladding layer that needs to be clad is determined, and the pit is repaired by stacking layers.

[0048] Since the cavitation of thinner workpieces is not suitable for processing into regular pits, it is necessary to use multiple degrees of freedom to insert the laser-arc composite component 4 into the pit. By using the XYZ axis component 3 and the dual-axis component 6, the laser-arc composite component 4 can accurately find the appropriate repair point. The displacement fixture 2 can be used to cooperate with the five-axis motion component above, thus the equipment has a higher degree of freedom in processing.

[0049] Using mixed powders during powder blowing increases the structural strength of the metal. The powder, after passing through the powder reversing container 502, rotates and is ejected. The density of the rotating metal powder increases slowly, and its velocity increases rapidly near ejection. The ejected powder, combined with the electric arc, is simultaneously fed into the material during deposition. High focusing energy makes it primarily used for localized repairs and surface cladding, and it can also manufacture large parts. The open workspace allows for the repair of large components.

[0050] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0051] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0052] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A composite precision repair device for metal components, comprising a base fixture (1) for mounting on a machining center workbench, characterized in that: It also includes a displacement fixture (2), an XYZ axis assembly (3), a laser-arc composite assembly (4), and a coaxial powder blowing assembly (5). The displacement fixture (2) is installed on the base fixture (1) to enable the workpiece to swing and rotate. The XYZ axis assembly (3) is installed on the base fixture (1). The laser-arc composite assembly (4) is installed on the XYZ axis assembly (3) to enable movement along the X, Y, and Z axes. The coaxial powder blowing assembly (5) is installed on the laser-arc composite assembly (4) to achieve coaxiality with the arc and to coaxially blow composite metal powder into the molten pool during arc cladding.

2. The composite precision repair equipment for metal components according to claim 1, characterized in that: It also includes a dual-axis assembly (6), which is installed on the output shaft of the XYZ axis assembly (3), and a laser-arc composite assembly (4) is installed on the output shaft of the dual-axis assembly (6). The dual-axis assembly (6) is used to realize the swing and rotation of the laser-arc composite assembly (4).

3. The composite precision repair equipment for metal components according to claim 2, characterized in that: The displacement fixture (2) includes a base (201), a middle platform (202) and a top platform (203). The base (201) is fixedly installed on the base fixture (1). Two sets of arc-shaped guide rails (204) are fixedly installed on the bottom surface of the middle platform (202). The arc-shaped guide rails (204) are inserted into the upper end of the base (201) and can slide relative to each other. A worm gear mechanism (205) is also provided between the two, which can realize the middle platform (202) changing the angle relative to the base (201) according to the arc-shaped guide rails (204). A servo pressure shaft (206) is installed between the top platform (203) and the middle platform (202) to realize the rotation of the top platform (203) relative to the middle platform (202).

4. The composite precision repair equipment for metal components according to claim 3, characterized in that: The laser-arc composite assembly (4) includes an arc mechanism (401) and a laser mechanism (402). The arc mechanism (401) is installed on the output end of the dual-axis assembly (6), with its arc generating end facing the top platform (203). The laser mechanism (402) is installed on one side of the arc mechanism (401) using a servo rotation mechanism, and is used to switch between laser-guided arc and laser cladding.

5. The composite precision repair equipment for metal components according to claim 4, characterized in that: The laser-arc composite assembly (4) also includes an ultrasonic transmitter (403), which is fixed on one side of the arc mechanism (401). The ultrasonic transmitter (403) is used to emit ultrasonic waves to the molten pool.

6. The composite precision repair equipment for metal components according to claim 5, characterized in that: The coaxial powder blowing assembly (5) includes a gathering pipe (501), a powder reversing container (502), and a supply pipe (503). The powder reversing container (502) is sealed on the outer side of the upper end of the arc mechanism (401) and forms a closed, annular powder flow cavity (505) with the end body of the arc mechanism (401). The gathering pipe (501) is an annular conical pipe and is coaxially covered outside the arc emission tip of the arc mechanism (401). The gathering pipe (501) is installed at the bottom of the powder reversing container (502). A through groove (504) is provided at the connection between the powder reversing container (502) and the gathering pipe (501) to connect the internal cavity of the gathering pipe (501) and the powder flow cavity (505). The supply pipe (503) is installed on one side of the powder reversing container (502) and is tangent to the powder flow cavity (505).

7. The composite precision repair equipment for metal components according to claim 6, characterized in that: The coaxial powder blowing assembly (5) also includes a spiral blade (506), which is disposed in the powder flow cavity (505). The spiral blade (506) is fixed on the end body of the electric arc mechanism (401). The end of the spiral blade (506) is not in contact with the inner wall structure of the powder flow cavity (505), and a spiral channel (507) is formed between them.

8. The composite precision repair equipment for metal components according to claim 3, characterized in that: The worm gear mechanism (205) includes a worm gear assembly (2051) installed at the center of the bottom surface of the intermediate platform (202) and an electric worm (2052) installed in the base platform (201), the electric worm (2052) meshing with the worm gear assembly (2051).

9. The composite precision repair equipment for metal components according to claim 7, characterized in that: A fixing fixture (207) is installed on the top platform (203) for adaptively fixing the workpiece to be repaired.

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