Strengthening device based on high-frequency vibration assisted laser wire additive manufacturing

Abstract

The application provides a reinforcing device based on high-frequency vibration auxiliary laser fuse additive manufacturing, which comprises a damping platform, a substrate clamping mechanism, a high-frequency vibration mechanism, a laser welding mechanism, a coaxial wire feeding mechanism and a gas feeding mechanism; the substrate clamping mechanism is arranged on the damping platform; the high-frequency vibration mechanism is located below the damping platform, and comprises a damping support assembly and a high-frequency vibration assembly; the damping support assembly is connected with the damping platform, the high-frequency vibration assembly is arranged on the damping support assembly, and the high-frequency vibration assembly is used for high-frequency vibration of the damping platform; the coaxial wire feeding mechanism and the gas feeding mechanism are both suspended above the damping platform through a support base, and the wire feeding end of the coaxial wire feeding mechanism, the focused light spot of the laser welding mechanism and the gas flow outlet of the gas feeding mechanism form a light-wire-gas synergistic interface in a coaxial form, and through the application, the problems caused by small amplitude and fixed frequency of conventional ultrasonic vibration can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of laser additive technology, in particular to a reinforcing device based on high-frequency vibration assisted laser wire additive manufacturing. BACKGROUND

[0002] Laser wire additive manufacturing, i.e. WLAM (Wire-fed Laser Additive Manufacturing) technology, is a technology that forms a workpiece by melting metal wire through a high-energy laser layer by layer. It has the advantages of high material utilization, fast forming speed, and suitability for manufacturing large-size complex structures, and is widely used in the fields of aerospace and energy equipment. Compared with powder-based additive manufacturing technology, laser wire additive manufacturing can avoid powder spatter pollution and achieve higher deposition efficiency through continuous wire feeding. In recent years, with the popularity of lightweight materials such as titanium alloy and high-strength aluminum alloy in aircraft load-bearing components, the exploration of laser wire additive manufacturing in the field of dissimilar metal composite manufacturing has become a research hotspot. However, there are also some drawbacks. During the rapid solidification process of the molten pool, pores, coarse grain defects and large stress concentration are easily produced, which will significantly reduce the tensile strength and fatigue life of the component.

[0003] Currently, in order to improve the above problems, the prior art attempts to optimize the laser process parameters or introduce ultrasonic vibration assisted processing. However, conventional ultrasonic vibration has the limitations of small amplitude and fixed frequency, which makes it difficult to effectively control the dynamic solidification process of the molten pool of dissimilar materials, and the vibration energy transmission efficiency is significantly affected by material damping.

[0004] Under the drive of the "double carbon" strategy, there is an urgent need for lightweight aerospace equipment and personalized manufacturing of high-end medical devices, and it is necessary to develop composite additive manufacturing technology with high-precision interface regulation capability and engineering applicability. SUMMARY

[0005] Therefore, the purpose of the present application is to provide a reinforcing device based on high-frequency vibration assisted laser wire additive manufacturing to solve the problems in the prior art.

[0006] To achieve the above purpose, the present application provides a reinforcing device based on high-frequency vibration assisted laser wire additive manufacturing, which comprises a damping platform, a substrate clamping mechanism, a high-frequency vibration mechanism, a laser welding mechanism, a coaxial wire feeding mechanism and a gas feeding mechanism.

[0007] The substrate clamping mechanism is arranged on the damping platform, and the substrate clamping mechanism is used for clamping and fixing a workpiece.

[0008] The high-frequency vibration mechanism is located below the damping platform, the high-frequency vibration mechanism comprises a damping support assembly and a high-frequency vibration assembly, the damping support assembly is connected with the damping platform, the high-frequency vibration assembly is arranged on the damping support assembly, one end of the high-frequency vibration assembly is in contact with the bottom of the damping platform, and the high-frequency vibration assembly is used for high-frequency vibration of the damping platform.

[0009] The laser welding mechanism, the coaxial wire feeding mechanism and the gas feeding mechanism are all suspended above the damping platform through a support base, the coaxial wire feeding mechanism is used for conveying alloy wire, the gas feeding mechanism is used for outputting protective gas, a wire feeding end of the coaxial wire feeding mechanism, a focused light spot of the laser welding mechanism and a gas flow outlet of the gas feeding mechanism form a light-wire-gas synergistic interface in a coaxial form, and the light-wire-gas synergistic interface corresponds to a molten pool position formed by the surface of the workpiece.

[0010] The high-frequency vibration mechanism, the coaxial wire feeding mechanism, the gas feeding mechanism and the laser welding mechanism are all used for molten wire additive operation on the molten pool on the workpiece.

[0011] The workpiece is clamped and fixed on the damping platform through the substrate clamping mechanism, the high-frequency vibration assembly is arranged below the damping platform through the damping support assembly, the damping platform is subjected to high-frequency vibration through the high-frequency vibration assembly, alloy wire is conveyed through the coaxial wire feeding mechanism, protective gas is blown out through the gas feeding mechanism, the wire feeding end of the coaxial wire feeding mechanism, the focused light spot of the laser welding mechanism and the gas flow outlet of the gas feeding mechanism are all aligned with the molten pool formed by the surface of the workpiece in a coaxial form, laser molten wire additive operation is performed on the workpiece through high-frequency vibration and laser, and the problems caused by small amplitude and fixed frequency of conventional ultrasonic vibration can be solved, thereby providing support for developing a composite additive technology with high-precision interface regulation and engineering practicability.

[0012] Preferably, the substrate clamping mechanism comprises a substrate fixing boss, a fixing plate arranged on the substrate fixing boss, a moving plate and a driving assembly, the substrate fixing boss is arranged on the damping platform, a placing space is left between the fixing plate and the moving plate, the driving assembly is connected with the moving plate, and the driving assembly is used for driving the moving plate to be close to or away from the fixing plate.

[0013] Preferably, the substrate fixing boss is provided with a mounting groove, the driving assembly comprises a push rod, a pull rod and a connecting rod, one end of the push rod is connected with the moving plate, the other end of the push rod is connected with the middle part of the pull rod through the connecting rod, the bottom end of the pull rod is hinged to the bottom of the mounting groove, the connecting rod is hinged to the bottom of the mounting groove through a mounting bracket, and the connecting rod is connected with the groove wall of the mounting groove through an extension spring.

[0014] Preferably, the damping support assembly comprises a support base, a damping spring and a support plate, one end of the damping spring is connected with the support base, the other end of the damping spring is connected with the bottom of the damping platform, the support plate is laid between the damping platform and the support base, the support plate is connected with the support base through a bottom column, and the support plate is connected with the damping platform through a sliding column.

[0015] Preferably, the high-frequency vibration assembly comprises a vibration generating controller and an electromagnetic exciter arranged on the support base, the support plate is provided with a through groove, the vibration end of the electromagnetic exciter penetrates through the through groove and contacts the bottom of the damping platform, the vibration generating controller is connected with the electromagnetic exciter, and the vibration generating controller is used to adjust the vibration frequency of the electromagnetic exciter.

[0016] Preferably, the coaxial wire feeding mechanism comprises a wire guide pipe, a wire feeding wheel set and an adjusting assembly, the wire guide pipe extends to the center area of the focused light spot, the wire guide pipe is connected with the adjusting assembly, the adjusting assembly and the wire feeding wheel set are respectively connected with the support base, the adjusting assembly is used to adjust the angle and height position of the wire guide pipe, the wire feeding wheel set is connected with the wire guide pipe, and the wire feeding wheel set is used to feed the alloy wire into the wire guide pipe.

[0017] Preferably, the gas feeding mechanism comprises a gas feeding fixed rod, a flow guide and a gas feeding nozzle, one end of the gas feeding fixed rod is connected with the support base through an adjustable plate, the other end of the gas feeding fixed rod is connected with the outer side of the flow guide, the inner cavity of the flow guide is communicated with the gas feeding nozzle, the flow guide is sealingly connected with the gas feeding nozzle, and the flow guide is used to guide the gas flow direction coaxial with the vibration transmission direction of the damping platform.

[0018] Preferably, the gas feeding nozzle is provided with a porous gas diffusion ring close to the end of the flow guide, the porous gas diffusion ring and the gas feeding nozzle cooperate to blow the protective gas flowing in a laminar flow manner to the molten pool, and the gas flow direction of the protective gas and the wire feeding direction of the wire guide pipe are coaxially distributed.

[0019] Preferably, the vane is located at the edge of one end of the air feeding nozzle, and the vane is located above the air feeding nozzle, and a coating is provided on the surface of the vane, and the vane coated with the coating is used to eliminate local air flow disturbance caused by vibration.

[0020] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 A perspective view of a reinforcing device based on high-frequency vibration assisted laser wire additive manufacturing is provided for an embodiment of the present application;

[0022] Figure 2 A front view of a reinforcing device based on high-frequency vibration assisted laser wire additive manufacturing is provided for an embodiment of the present application;

[0023] Figure 3 A structural schematic view of a substrate clamping mechanism is provided for an embodiment of the present application;

[0024] Figure 4 A structural schematic view of a damping support assembly is provided for an embodiment of the present application;

[0025] Figure 5 A structural schematic view of an air feeding mechanism is provided for an embodiment of the present application;

[0026] Figure 6 A structural schematic view of a coaxial wire feeding mechanism is provided for an embodiment of the present application;

[0027] Figure 7 A sectional view of a flow guide and an air feeding nozzle is provided for an embodiment of the present application.

[0028] Explanation of main element symbols:

[0029] 10, damping platform; 211, support base; 212, damping spring; 213, support plate; 214, fixed spring support column; 215, bottom column; 216, sliding column; 221, electromagnetic exciter; 222, vibration generation controller; 223, fixed box; 41, wire guide pipe; 42, support base; 44, adjustable bolt; 45, fixed pin; 46, wire guide sliding rod; 47, angle adjusting arm; 48, wire guide pipe fixing clamp; 51, air guide fixed rod; 52, flow guide; 521, air guide pipe; 53, air feeding nozzle; 54, adjustable plate; 55, air receiving port; 56, air guide pipe; 57, annular auxiliary nozzle nest; 58, porous gas diffusion ring; 59, vane; 61, substrate fixing boss; 611, mounting plate; 62, fixed plate; 63, moving plate; 64, placement space; 65, push rod; 66, pull rod; 67, connecting link; 68, mounting bracket.

[0030] The following detailed description will further describe the present application with reference to the above mentioned drawings. DETAILED DESCRIPTION

[0031] For the purpose of promoting an understanding of the present application, the present application will be described in greater detail below with reference to the drawings. Several embodiments of the present application are shown in the drawings. However, the present application can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete. It will be fully appreciated that the present application is capable of being practiced with or without these specific embodiments.

[0032] It should be noted that when an element is referred to as being "on" another element, it can be directly on the other element or intervening elements can also be present. When an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can also be present. The terms "vertical", "horizontal", "left", "right" and similar expressions as used herein are for illustration only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in the description of the application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

[0034] Reference will now be made to Figures 1 to 7 , the reinforcing device based on high-frequency vibration auxiliary laser fuse additive manufacturing in the embodiments of the present application, comprising a damping platform 10, a high-frequency vibration mechanism, a laser welding mechanism, a coaxial wire feeding mechanism and a gas feeding mechanism.

[0035] Among them: the damping platform 10 is provided with a substrate clamping mechanism, the substrate clamping mechanism is used for clamping and fixing the workpiece, specifically, the substrate clamping mechanism includes a substrate fixing boss 61, a fixed plate 62 provided on the substrate fixing boss 61, a moving plate 63 and a driving assembly, the substrate fixing boss 61 is parallel to the damping platform 10, the fixed plate 62 is parallel to the moving plate 63, the fixed plate 62 and the moving plate 63 leave a placing space 64 between them, the placing space 64 is used for placing the workpiece, the driving assembly is connected with the moving plate 63, and the driving assembly is used for driving the moving plate 63 to approach or move away from the fixed plate 62, so as to clamp or loosen the workpiece in the placing space 64.

[0036] In the embodiment, one side of the substrate fixing boss 61 is provided with a mounting groove, and the bottom surface of the mounting groove is provided with a mounting plate 611. The driving assembly is mounted on the mounting plate 611. The driving assembly includes a push rod 65, a pull rod 66, and a connecting rod 67. One end of the push rod 65 is connected with the moving plate 63. The other end of the push rod 65 is connected with the middle part of the pull rod 66 through the connecting rod 67. The bottom end of the pull rod 66 is hinged with the mounting plate 611. In other words, one end of the connecting rod 67 is connected with the end of the push rod 65 away from the moving plate 63. The other end of the connecting rod 67 is connected with the middle part of the pull rod 66. It should be noted that the connecting rod 67 is connected with the mounting plate 611 through a mounting bracket 68. Both ends of the mounting bracket 68 are hinged with the connecting rod 67 and the mounting plate 611, respectively. The middle part of the mounting bracket 68 is connected with the groove wall of the mounting groove through a telescopic spring. The telescopic spring is parallel to the push rod 65. The push plate is perpendicular to the pull rod 66. The pull rod 66 is perpendicular to the mounting plate 611. When the pull rod 66 pulls the push rod 65 through the connecting rod 67, the push rod 65 drives the moving plate 63 to move. The moving plate 63 moves away from the fixed plate 62. The telescopic spring is in a stretched state. When the distance between the moving plate 63 and the fixed plate 62 is greater than the size of the workpiece, the workpiece is placed in the placement space 64 between the moving plate 63 and the fixed plate 62. Then, the pull rod 66 is loosened. Under the action of the telescopic spring, the pull rod 66 rotates at the hinged end as the fulcrum and moves towards the moving plate 63. The moving plate 63 moves towards the fixed plate 62 until the side of the workpiece abuts against it. At this time, the moving plate 63 moves away from the fixed plate 62 by a certain distance. Since the length of the push rod is unchanged, the telescopic spring is still stretched. Under the action of the telescopic spring, the mounting bracket 68, the connecting rod 67, the push rod 65, and the moving plate 63 maintain the same position and provide a certain force to clamp the workpiece between the moving plate 63 and the fixed plate 62.

[0037] In the embodiment, the high-frequency vibration mechanism is located below the damping platform 10, and the high-frequency vibration mechanism comprises a damping support assembly and a high-frequency vibration assembly. The damping support assembly is connected with the damping platform 10 and is used for supporting the damping platform 10 and providing vibration damping for the damping platform 10. Specifically, the damping support assembly comprises a support base 211, a damping spring 212 and a support plate 213. The support plate 213, the support base 211 and the damping platform 10 are parallel to each other. The support base 211 is perpendicular to the damping spring 212. One end of the damping spring 212 is connected with the support base 211. The other end of the damping spring 212 is connected with the bottom of the damping platform 10 through a fixed spring support 214. The support plate 213 is laid between the damping platform 10 and the support base 211. The support plate 213 is connected with the support base 211 through a bottom column 215. The support plate 213 is slidingly connected with the damping platform 10 through a sliding column 216. Specifically, a through hole is formed in the damping platform 10. One end of the sliding column 216 extends to the damping platform 10 through the through hole. The other end of the sliding column 216 is fixedly connected with the support base 211. The sliding column 216 is parallel to the bottom column 215, and the sliding column 216 is perpendicular to the support plate 213. The damping spring 212 is perpendicular to the support plate 213. It can be understood that the damping spring 212 is used for providing damping and support for the damping platform 10. The sliding column 216 is used for ensuring that the damping platform 10 will not be deviated in position under the action of the high-frequency vibration assembly.

[0038] In the embodiment, the high-frequency vibration assembly is arranged on the support base 211 of the damping support assembly and is located between the damping support assembly and the damping platform 10. The high-frequency vibration assembly is used for high-frequency vibration of the damping platform 10. Specifically, the high-frequency vibration assembly comprises a vibration generation controller 222 arranged on the support base 211 and an electromagnetic exciter 221. The electromagnetic exciter 221 is installed on the support base 211 through a fixed box 223. A through slot is formed in the support plate 213. The vibration end of the electromagnetic exciter 221 penetrates through the through slot and contacts the bottom of the damping platform 10. The electromagnetic exciter 221 is connected with the vibration generation controller 222. The vibration generation controller 222 is used for adjusting the vibration frequency of the electromagnetic exciter 221. The vibration frequency of the electromagnetic exciter 221 is coordinated with the laser welding mechanism.

[0039] It should be noted that the vibration generation controller 222 comprises a control box and a switch which are electrically connected. The control box is provided with a frequency conversion interface and a laser frequency interface. The laser frequency interface is used for connecting the frequency of the laser equipment. The entire vibration generation controller 222 can be controlled through the switch. The vibration generation controller 222 is fixed on the support base 211 through four fixed bolts.

[0040] It should be noted that the vibration frequency of the electromagnetic vibrator 221 needs to be coordinated with the laser welding parameters (such as power, scanning speed) of the laser welding mechanism to avoid vibration causing spot deviation or unstable molten pool.

[0041] In the embodiment, the laser welding mechanism, the coaxial wire feeding mechanism and the gas feeding mechanism are suspended above the damping platform 10 through the support base 42, and the laser welding mechanism, the coaxial wire feeding mechanism and the gas feeding mechanism are coaxially distributed, the coaxial wire feeding mechanism is used for conveying alloy wire, the gas feeding mechanism is used for blowing protective gas, the wire feeding end of the coaxial wire feeding mechanism, the focused spot of the laser welding mechanism and the gas flow outlet of the gas feeding mechanism form a light-wire-gas synergistic interface in a coaxial form, and the light-wire-gas synergistic interface corresponds to the molten pool position formed by the surface of the workpiece, that is, the wire feeding end of the coaxial wire feeding mechanism, the focused spot of the laser welding mechanism and the gas flow outlet of the gas feeding mechanism are all aligned with the molten pool formed by the surface of the workpiece in a coaxial form, so as to realize the coordination of the high-frequency vibration mechanism, the coaxial wire feeding mechanism, the gas feeding mechanism and the laser welding mechanism, and to perform wire melting additive operation on the molten pool of the workpiece on the damping platform 10.

[0042] In the embodiment, the coaxial wire feeding mechanism includes a wire guide pipe 41, a wire feeding wheel set and an adjusting assembly arranged on the support base 42, the end of the wire guide pipe 41 is directed to the central region of the focused spot, and the end of the wire guide pipe 41 can extend to the central region of the focused spot, the wire guide pipe 41 is connected with the adjusting assembly, the adjusting assembly is used for adjusting the angle and height position of the wire guide pipe 41, and the wire feeding wheel set is connected with the wire guide pipe 41 and is used for conveying alloy wire into the wire guide pipe 41. It should be noted that the wire feeding wheel set includes a pressure roller, and a V-shaped guide groove is arranged on the surface of the pressure roller. The V-shaped guide groove is beneficial to clamping alloy wire and controlling wire feeding speed.

[0043] In the embodiment, the adjusting assembly includes a wire guide slide rod 46, an angle adjusting arm 47 and a wire guide pipe fixing clamp 48, one end of the angle adjusting arm 47 is connected with the wire guide pipe fixing clamp 48 through a fixing plate 62, the wire guide pipe fixing clamp 48 is used for clamping the wire guide pipe 41, the other end of the angle adjusting arm 47 is connected with the wire guide slide rod 46, the wire guide slide rod 46 is fixedly connected with the support base 42 and is perpendicular to the damping platform 10, specifically, the one end of the angle adjusting arm 47 is provided with a sliding block, a linear guide rail is arranged on the wire guide slide rod 46, and the sliding block is matched with the linear guide rail. It can be understood that the sliding block and the linear guide rail are relatively slid by a step motor drive, so as to drive the angle adjusting arm 47 to move relative to the wire guide slide rod 46, thereby adjusting the height position of the wire guide pipe 41. The surface of the linear guide rail is coated with a polytetrafluoroethylene wear-resistant coating, and limiters are arranged at both ends of the linear guide rail to prevent the sliding block from sliding out of the linear guide rail.

[0044] It should be noted that the angle adjusting arm 47 is connected with the connecting plate through the adjustable bolt 44, the connecting plate is fixedly connected with the guide tube fixing clamp 48 through the fixing pin 45, specifically, the angle adjusting arm 47 is provided with a through slot and a insertion slot, one end of the connecting plate is provided with a through hole, one end of the connecting plate is inserted into the insertion slot, the adjustable bolt 44 is screwed with a nut through the through slot and the through hole, the angle is manually adjusted by loosening the adjustable bolt 44, so as to adjust the angle of the guide tube 41.

[0045] In the embodiment, the air feeding mechanism includes a guide air fixing rod 51, a flow guide 52 and an air feeding nozzle 53, one end of the guide air fixing rod 51 is connected with the support base 42 through an adjustable plate 54, the adjustable plate 54 is located above the flow guide 52, specifically, the guide air fixing rod 51 is fixedly connected with the adjustable plate 54, the adjustable plate 54 is detachably connected with the support base 42 through a buckle structure, the flow guide 52 is used for guiding the direction of the airflow coaxial with the vibration transmission direction of the damping platform 10, the outer side of the flow guide 52 is connected with the other end of the guide air fixing rod 51, the flow guide 52 is a block structure, the inner cavity of the flow guide 52 is used as a guide air pipeline 521, and the guide air pipeline 521 is communicated with the air feeding nozzle 53, the flow guide 52 is provided with an air inlet 55, the air inlet 55 is communicated with the guide air pipeline 521 of the flow guide 52, and the air inlet 55 is connected with an external gas source through a guide air pipe 56, the external gas source is used for providing a protective gas.

[0046] It should be noted that the air feeding nozzle 53 is a conical structure, and the end with a relatively larger area in the air feeding nozzle 53 is used as an air inlet end, and the air inlet end is sealingly connected with the flow guide 52 through an annular auxiliary nozzle nest 57, and the end with a relatively smaller area is used as an air outlet end for spraying the protective gas, the end of the air feeding nozzle 53 close to the flow guide 52, i.e., the air inlet end with a relatively larger area, is provided with a porous gas diffusion ring 58, the protective gas entering the air feeding nozzle 53 passes through the annular gap of the porous gas diffusion ring 58 and blows to the molten pool in a laminar flow state, wherein the airflow direction of the protective gas is coaxial with the wire feeding direction of the guide tube 41, and the protective gas can be argon, and the protective gas enters the air feeding nozzle 53 after sequentially passing through the guide air pipe 56, the air inlet 55, the inner cavity of the flow guide 52 and the porous gas diffusion ring 58.

[0047] In the embodiment, the inner cavity of the flow guide 52 is provided with a blade 59, the blade 59 is located at the edge of one end of the air feeding nozzle 53, and the blade 59 is located above the air feeding nozzle 53, the surface of the blade 59 is coated with a coating, the blade 59 coated with the coating is used for eliminating local airflow disturbance caused by vibration, the coating is a nano-level aluminum oxide coating, when the blade 59 starts to rotate, the rate of the protective gas passing through can be accelerated, which is conducive to forming laminar flow gas to prevent airflow turbulence.

[0048] It can be understood that the wire feeding mechanism, the gas feeding mechanism and the electromagnetic vibrator 221 work together to adjust the relative angle between the wire guide tube 41 and the gas feeding nozzle 53 by dynamically adjusting the angle of the wire guide tube 41 and the gas feeding nozzle 53, so that the wire feeding direction, the focused light spot and the gas jet direction are all aligned with the center position of the molten pool.

[0049] In the embodiment, the laser power of the laser welding mechanism is 500W-5000W, the spot diameter is 2mm, the wire feeding speed of the alloy wire is 2m / min-10m / min, the protective gas is argon, and the purity of the argon is ≥99.99%.

[0050] In the specific implementation, the workpiece is clamped and fixed on the damping platform 10 by the substrate clamping mechanism, the high-frequency vibration assembly is arranged below the damping platform 10 by using the damping support assembly, the high-frequency vibration assembly is used to vibrate the damping platform 10, the alloy wire is fed by the coaxial wire feeding mechanism, the protective gas is blown out by the gas feeding mechanism, the wire feeding end of the coaxial wire feeding mechanism, the focused light spot of the laser welding mechanism and the gas flow outlet of the gas feeding mechanism are all aligned with the molten pool formed on the workpiece surface in a coaxial manner, so as to realize the laser wire melting additive operation of the workpiece by combining high-frequency vibration with laser, which can solve the problems caused by small amplitude and fixed frequency of conventional ultrasonic vibration, and provide support for developing a composite additive technology with high-precision interface regulation and engineering practicability.

[0051] It should be noted that the above implementation process is only for the purpose of illustrating the feasibility of the present application, but it does not mean that the present application based on the high-frequency vibration assisted laser wire melting additive manufacturing strengthening device has only the above-mentioned unique implementation process, on the contrary, as long as the present application based on the high-frequency vibration assisted laser wire melting additive manufacturing strengthening device can be implemented, it can be included in the feasible implementation scheme of the present application.

[0052] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the illustrative description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0053] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the patent scope of the present application. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the appended claims.

Claims

1. A strengthening device based on high-frequency vibration-assisted laser filament additive manufacturing, characterized in that, It includes a shock-absorbing platform, a substrate clamping mechanism, a high-frequency vibration mechanism, a laser welding mechanism, a coaxial wire feeding mechanism, and an air supply mechanism; The substrate clamping mechanism is disposed on the shock-absorbing platform, and the substrate clamping mechanism is used to clamp and fix the workpiece. The high-frequency vibration mechanism is located below the vibration damping platform. The high-frequency vibration mechanism includes a vibration damping support assembly and a high-frequency vibration assembly. The vibration damping support assembly is connected to the vibration damping platform. The high-frequency vibration assembly is disposed on the vibration damping support assembly. One end of the high-frequency vibration assembly contacts the bottom of the vibration damping platform. The high-frequency vibration assembly is used to perform high-frequency vibration on the vibration damping platform. The vibration damping support assembly includes a support base, a vibration damping spring, and a support plate. The laser welding mechanism, the coaxial wire feeding mechanism, and the gas supply mechanism are all suspended above the vibration damping platform via a support base. The coaxial wire feeding mechanism is used to feed alloy wire, and the gas supply mechanism is used to output protective gas. The wire feeding end of the coaxial wire feeding mechanism, the focused spot of the laser welding mechanism, and the gas outlet of the gas supply mechanism form a light-wire-gas synergistic interface in a coaxial manner. The light-wire-gas synergistic interface corresponds to the position of the molten pool formed on the surface of the workpiece. The high-frequency vibration mechanism, the coaxial wire feeding mechanism, the air supply mechanism, and the laser welding mechanism are all used to perform molten wire additive manufacturing on the molten pool of the workpiece. The high-frequency vibration assembly includes a vibration generator controller and an electromagnetic vibrator mounted on the support base. The vibration damping support assembly has a through slot, through which the vibration end of the electromagnetic vibrator passes and contacts the bottom of the vibration damping platform. The vibration generator controller is connected to the electromagnetic vibrator and is used to adjust the vibration frequency of the electromagnetic vibrator. The air delivery mechanism includes an air delivery fixing rod, a guide member, and an air delivery nozzle. One end of the air delivery fixing rod is connected to the support base via an adjustable plate, and the other end of the air delivery fixing rod is connected to the outer side of the guide member. The inner cavity of the guide member communicates with the air delivery nozzle, and the guide member and the air delivery nozzle are sealed together. The guide member is used to guide the airflow direction to be coaxial with the vibration transmission direction of the shock absorption platform. The air delivery nozzle has a conical structure. In the air delivery nozzle, the end with a relatively larger area serves as the air inlet end, and this air inlet end is connected to the guide member via a nested annular auxiliary nozzle. The end with a relatively smaller area serves as the air outlet end, used to spray out the protective gas. A porous gas diffusion ring is provided at the end of the gas nozzle near the guide member. The protective gas flows into the cavity of the gas delivery nozzle through the annular gap of the porous diffusion ring. The porous gas diffusion ring and the gas delivery nozzle work together to make the flowing protective gas blown towards the molten pool in a laminar flow manner. The airflow direction of the protective gas is coaxial with the wire feeding direction of the coaxial wire feeding mechanism. A blade is provided in the inner cavity of the guide member. The blade is located at the edge of one end of the gas delivery nozzle and is located above the gas delivery nozzle. The surface of the blade is coated with a coating to eliminate local airflow disturbances caused by vibration.

2. The strengthening device based on high-frequency vibration-assisted laser filament additive manufacturing according to claim 1, characterized in that, The substrate clamping mechanism includes a substrate fixing boss, a fixing plate disposed on the substrate fixing boss, a moving plate, and a driving component. The substrate fixing boss is disposed on the shock-absorbing platform. There is a placement space between the fixing plate and the moving plate. The driving component is connected to the moving plate and is used to drive the moving plate to move closer to or away from the fixing plate.

3. The strengthening device based on high-frequency vibration-assisted laser filament additive manufacturing according to claim 2, characterized in that, The substrate fixing boss has a mounting groove. The driving assembly includes a push rod, a pull rod and a connecting rod. One end of the push rod is connected to the moving plate. The other end of the push rod is connected to the middle of the pull rod through the connecting rod. The bottom end of the pull rod is hinged to the bottom of the mounting groove. The connecting rod is hinged to the bottom of the mounting groove through a mounting bracket and is connected to the groove wall of the mounting groove through a telescopic spring.

4. The strengthening device based on high-frequency vibration-assisted laser filament additive manufacturing according to claim 1, characterized in that, One end of the shock-absorbing spring is connected to the support base, and the other end of the shock-absorbing spring is connected to the bottom of the shock-absorbing platform. The support plate is laid flat between the shock-absorbing platform and the support base. The support plate is connected to the support base through a bottom column and to the shock-absorbing platform through a sliding column.

5. The strengthening device based on high-frequency vibration-assisted laser filament additive manufacturing according to claim 1, characterized in that, The coaxial wire feeding mechanism includes a wire guide tube, a wire feeding wheel assembly, and an adjustment component. The end of the wire guide tube extends to the central region of the focused spot. The wire guide tube is connected to the adjustment component. The adjustment component and the wire feeding wheel assembly are respectively connected to the support base. The adjustment component is used to adjust the angle and height of the wire guide tube. The wire feeding wheel assembly is connected to the wire guide tube and is used to feed the alloy wire into the wire guide tube.

Images