Ultrasonic forging assisted processing device based on coaxial fused wire additive process

Abstract

The present invention discloses an ultrasonic forging-assisted processing device based on a coaxial fuse additive process, comprising a robotic arm, a coaxial fuse additive structure, and an ultrasonic forging-assisted structure. The ultrasonic forging-assisted structure is assembled on the printing end of the coaxial fuse additive structure, and an ultrasonic generator group is provided on its mounting frame. The transducer is fixed by a lifting bracket, and the lifting bracket is connected to the hydraulic pipe and the piston rod. The spring rod connects the dragon spine and the ultrasonic auxiliary spine. The ultrasonic auxiliary spine has a heating plate, a rolling seat, etc. inside, which connects the dragon spine and the vibrating and pressing part movably, and the forward auxiliary spine is connected to the dripper through a linkage frame. During operation, the robotic arm controls the printing of the coaxial fuse additive structure, and the ultrasonic forging-assisted structure improves the density of the precipitation layer, controls its deformation, and improves the surface quality through operations such as heating, ultrasonic vibration, and micro-forging. At the same time, the wire dripping aperture is adjusted through a special structure, and the cleaning liquid is rolled on to achieve high-quality printing operations.

Description

Technical Field

[0001] The present invention relates to the technical field of coaxial fuse additive processes, and in particular to an ultrasonic forging-assisted processing device based on the coaxial fuse additive process. Background Art

[0002] The coaxial fused filament additive manufacturing process is an advanced additive manufacturing technology that employs beam shaping technology and uses wire as the deposition material. By aligning the laser beam with the wire, the wire is melted under program control and then deposited layer by layer along a preset path, thereby producing a three-dimensional solid part. This process offers advantages such as high deposition rate, high forming flexibility, and consistent forming quality during forward and backward motion. Its core technology is filament coupling, including intra-optical coaxial technology for ring-shaped beams and intra-optical coaxial technology for multi-beam integration. This technology requires precise control of process parameters such as laser power, scanning speed, and wire feed speed. The coaxial fused filament additive process is widely used in aerospace, automotive manufacturing, mold manufacturing, and other fields. Future development trends include multi-material composite manufacturing, microstructure and performance control, and intelligent manufacturing through the integration of technologies such as artificial intelligence.

[0003] The current coaxial fused filament additive process forms a layer-by-layer material structure through the accumulation of fuses when printing metal workpieces. After each layer of fuse accumulates and solidifies, a relatively stable material layer is formed, which is the precipitation layer. Since the temperature of the newly deposited fuse is higher and the previously deposited layer gradually cools down, there is a temperature gradient in the precipitation layer. Due to the difference in cooling rate, the microstructure of the precipitation layer may be uneven at different positions. For example, the part close to the surface may cool faster and have finer grains; while the internal part may cool slower and have relatively coarse grains. The uneven precipitation layer may cause residual stress inside the part, thereby affecting the dimensional accuracy and mechanical properties of the part. At the same time, in the current coaxial fused filament additive manufacturing process, the surface formed by the accumulation after the fuse melts is not smooth and flat, and a certain degree of step effect will appear, resulting in a higher surface roughness.

[0004] Therefore, an ultrasonic forging assisted processing device based on coaxial fused wire additive process is proposed. Summary of the Invention

[0005] The object of the present invention is to provide an ultrasonic forging-assisted processing device based on a coaxial fused wire additive process to solve the problems of uneven precipitation layer and high surface roughness raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: an ultrasonic forging-assisted processing device based on a coaxial fused wire additive process, comprising:

[0007] A robotic arm, comprising a base, arm, wrist, and mounting arm, capable of precisely controlling the position, posture, and motion trajectory of the coaxial fusible additive structure through pre-programming or teach-and-play;

[0008] The coaxial fused wire additive structure uses beam shaping technology and uses wire as the deposition material. By aligning the laser beam with the wire, the wire is melted under program control and then deposited layer by layer along a preset path. It is bolted to the end of the mounting arm of the robotic arm.

[0009] An ultrasonic forging auxiliary structure is assembled at the printing end of the coaxial fusible additive structure and is in the same motion path as the printing head of the coaxial fusible additive structure;

[0010] Wherein, the ultrasonic forging auxiliary structure includes a mounting frame, and the mounting frame is connected to an ultrasonic generator group by bolts at one end away from the coaxial fuse additive structure, and the transducer of the ultrasonic generator group is fixed in the mounting sleeve of the hanging bracket by bolts, and the hanging bracket is composed of a mounting sleeve and a frame body, wherein the openings of the mounting sleeve on the left and right sides are connected with a vibration kit by bolts, and the internal sealing sliding of the vibration kit is provided with a sealing ring, and the sealing ring is limited and reset by sliding inside the vibration kit by a vibration spring fixed on the side, and the frame of the hanging bracket located in the middle position has a disconnection distance of a specified length, and in The upper and lower sections of the disconnected position are fixed to the hydraulic pipe and the piston rod respectively. An interface is provided above the side of the hydraulic pipe, and the interface is communicated with the interface provided on the upper side of the spring rod tube through a pipeline. The tube body of the spring rod is fixed to the two ends and the lower surface of the connecting dragon spine respectively, and the ultrasonic auxiliary ridges corresponding to the lower surface of the connecting dragon spine are distributed in an equidistant array along the path, and the lower ends of the spring rods are fixed to the upper surface of the ultrasonic auxiliary ridge. A heating plate is fixed inside each U-shaped body of the ultrasonic auxiliary ridge, and a rolling seat is connected to the upper part of the interior of the ultrasonic auxiliary ridge by bolts, and a rolling ball is provided inside the rolling seat. The upper surface of the ultrasonic auxiliary ridge is on the spring rod. Electric heating components and hot fluid heat conduction pipes are fixed on both sides in a symmetrical manner. The end of the connecting dragon ridge close to the coaxial fuse additive structure is movably connected to the vibration pressure piece through a spring rod on the lower surface. The plate bodies on both sides of the vibration pressure piece are open to the direction of the additive workpiece with a slide groove, and the internal sliding seal of the slide groove is provided with a piston pressure plate. The surface of the vibration pressure piece is provided with an interface corresponding to the slide groove, and is connected to the inside of the vibration kit under the cooperation of the interface and the pipeline. The connecting dragon ridge is provided with a forward auxiliary ridge on the opposite side of the vibration pressure piece through a kit sleeved on the lower end of the coaxial fuse additive structure in cooperation with the spring rod. The forward auxiliary ridge is close to the U of the coaxial fuse additive structure. A heat conducting plate is fixedly provided inside the body, and the heat conducting plate conducts heat to the heat conducting pipe of the hot fluid through a pipeline with high thermal conductivity material inside. A linkage frame is fixedly provided on the side of the forward auxiliary ridge facing the coaxial fuse additive structure. The linkage frame is fixed to the pressure ring inside the pressure chamber through a sliding rod and a sliding seal. An L-shaped centripetal open channel is provided inside the ring body of the dripper along the axial ring array of the dripper above the pressure chamber, and a ring frame fixed on the inner ring surface of the dripper is cooperated at the open end to perform a sliding connection of the piston push rod inside the channel. One end of the piston push rod is inserted through the ring frame and fixed to the elastic plate on the lower side of the guide nozzle.

[0011] Preferably, the mounting frame is a mounting arm structure with multiple rotation nodes, and each node has a detachable free angle adjustment capability, and one end thereof is fixed to the front side of the coaxial fuse additive structure by a bolt.

[0012] Preferably, a spring is fixed above the interior of the hydraulic pipe, and the lower end of the spring is fixed to a piston rod slidably arranged on the piston end inside the hydraulic pipe.

[0013] Preferably, the spring rod is composed of a hydraulic pipe and a piston rod, and high-temperature resistant safety fluid is stored in both the hydraulic pipe and the spring rod, and the upper end of the spring rod tube body is rotatably connected to a fixed screw, and the upper end of the fixed screw is threadedly connected to a screw hole opened inside the movable end of the mounting frame, and only the tube body of the spring rod connected to the hydraulic pipe stores high-temperature resistant safety fluid.

[0014] Preferably, the ultrasonic auxiliary ridge is composed of three U-shaped bodies of the same shape, and the three U-shaped bodies are movably connected through a universal shaft.

[0015] Preferably, the electric heating component is located on a side close to the transducer, and the upper surface of the electric heating component is integrally provided with an interface for electrical connection to the electric control module configured on the surface of the coaxial fuse additive structure, and the electric heating end of the electric heating component is inserted into the interior of the ultrasonic auxiliary ridge and contacts the heating plate, and the interior of the thermal fluid heat pipe is filled with a fluid material with high thermal conductivity, and the fluid material is in contact with the heating plate.

[0016] Preferably, the two U-shaped bodies away from the coaxial fuse additive structure are provided with a cleaning liquid tank inside the upper plate body, and the cleaning liquid tank immerses the rolling balls through a liquid channel connected to the inside of the rolling seat. The front auxiliary ridge and the upper part of the connecting dragon ridge are also connected to the rolling seat by bolts, and the front auxiliary ridge is evenly provided with rolling oil grooves on the rolling ball surface of the two rolling seats away from the coaxial fuse additive structure.

[0017] Preferably, the pressure chamber is annular and is opened below the inside of the dripper ring body, and a high-temperature resistant safety fluid is stored inside above the pressure ring.

[0018] Preferably, a sliding hole for sliding of the piston push rod is opened inside the ring frame of the inner ring surface of the dripper at a position corresponding to the pressure ring, and the piston push rod is limited in movement in the axial direction and reset by a pressure spring inside the sliding hole of the ring frame.

[0019] Preferably, the guide nozzle is fixedly connected to the upper part of the dripper ring, and the dripper is fixed to the drip hole position at the lower end of the coaxial fuse additive structure by bolts.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The present invention uses an ultrasonic forging auxiliary structure to perform multi-faceted treatment on the sedimentation layer during printing. On the one hand, the sedimentation layer is heated to a suitable ultrasonic and micro-forging temperature through the synergistic effect of components such as the thermal fluid heat pipe, the heating plate, and the electric heating component, so that the sedimentation layer can better undergo microstructural changes during the subsequent ultrasonic and micro-forging process. On the other hand, during the ultrasonic and micro-forging process, when the new sedimentation layer has undulations, the fluctuating movement of the ultrasonic auxiliary ridge will prompt the distance between the transducer and the sedimentation layer to be dynamically adjusted, increasing or reducing the degree of vibration of the sedimentation layer in the undulating area. This method can effectively improve the sedimentation layer. Density is improved, reducing microstructural inhomogeneities caused by temperature gradients, thereby improving the mechanical properties of parts. At the same time, the vibration of the transducer drives the vibration of the sealing ring, causing the safety fluid to push the piston pressure plate to perform high-frequency pushing on the precipitation layer after the coaxial fused filament additive structure drips, avoiding the situation where the precipitation layer excessively extends to both sides due to the high temperature of the liquid. This helps to control the lateral dimensional stability of the precipitation layer, reduce the surface unevenness caused by uneven extension, and further improve the flatness of both sides of the precipitation layer, thereby improving the surface quality of the printed workpiece, reducing the surface roughness, and making it closer to the ideal design requirements;

[0022] 2. The present invention provides a special guide nozzle and related linkage components at the lower end of the coaxial fused filament additive structure. During the printing process, the fluctuating movement of the forward auxiliary ridge drives the linkage frame, which in turn adjusts the piston push rod to dynamically adjust the radius of the lower port of the guide nozzle. This allows the guide nozzle port to accurately control the dripping aperture of the molten filament according to the movement of the forward auxiliary ridge. This effectively avoids the problem of uneven precipitation layer caused by uneven filament dripping, making the precipitation layer printed by the coaxial fused filament additive structure smoother, thereby improving the overall printing quality.

[0023] 3. During the movement of the forward auxiliary ridge on one side of the coaxial fusible filament additive structure, the cleaning liquid in the cleaning liquid tank can be rolled onto the surface of the precipitation layer to effectively dissolve the dirt on the surface of the precipitation layer. This not only cleans the surface of the precipitation layer, but also improves the contact condition between the upper and lower precipitation layers, making the connection between the upper and lower precipitation layers tighter and stronger, reducing the problem of poor interlayer bonding caused by factors such as surface dirt, and improving the structural integrity of the entire printed workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A three-dimensional structural view of the present invention;

[0025] Figure 2 Schematic diagram of the coaxial fuse additive structure and ultrasonic forging auxiliary structure of the present invention Figure 1 ;

[0026] Figure 3 Schematic diagram of the coaxial fuse additive structure and ultrasonic forging auxiliary structure of the present invention Figure 2 ;

[0027] Figure 4 This is a disassembled diagram of the ultrasonic forging auxiliary structure of the present invention;

[0028] Figure 5 This is a schematic diagram of the structure of the hanging bracket, ultrasonic auxiliary ridge, connecting dragon ridge, forward auxiliary ridge and dripper of the present invention;

[0029] Figure 6 This is a disassembled diagram of the lifting bracket of the present invention;

[0030] Figure 7 This is a cross-sectional view of the structure of the hanging bracket, ultrasonic auxiliary ridge, connecting dragon ridge, forward auxiliary ridge and dripper of the present invention;

[0031] Figure 8 This is a disassembly diagram of the dripper of the present invention.

[0032] In the picture:

[0033] 1. Robotic arm;

[0034] 2. Coaxial fuse additive structure;

[0035] 3. Ultrasonic forging auxiliary structure; 31. Mounting frame; 32. Ultrasonic generator group; 33. Transducer;

[0036] 34. Lifting bracket; 341. Vibration kit; 342. Sealing collar; 3421. Vibration spring; 343. Vibration pressure piece; 3431. Piston pressure plate; 344. Hydraulic pipe; 3441. Piston rod;

[0037] 35. Ultrasonic auxiliary ridge; 351. Universal joint; 352. Electric heating component; 353. Thermal fluid heat pipe; 354. Heating plate; 355. Rolling seat;

[0038] 36. Connecting dragon spine; 361. Fixing screw; 362. Spring rod;

[0039] 37. Forward auxiliary ridge; 371. Heat conduction plate; 372. Clean the liquid tank;

[0040] 38. Drip nozzle; 381. Diversion nozzle; 382. Piston push rod; 383. Pressure spring; 384. Pressure chamber; 385. Pressure ring; 386. Linkage frame. DETAILED DESCRIPTION

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0042] See also Figures 1 to 8 The present invention provides a technical solution for an ultrasonic forging-assisted processing device based on a coaxial fused wire additive process:

[0043] Ultrasonic forging assisted processing device based on coaxial fused wire additive process, including:

[0044] A robotic arm 1, comprising a base, an arm, a wrist, and a mounting arm, capable of precisely controlling the position, posture, and motion trajectory of a coaxial fusible additive structure 2 through pre-programming or teach-and-play;

[0045] The coaxial fused wire additive structure 2 uses beam shaping technology and uses wire as the deposition material. By making the laser beam coaxial with the wire, the wire is melted under program control and then deposited layer by layer along a preset path. It is connected to the end of the mounting arm of the robot arm 1 by bolts.

[0046] The ultrasonic forging auxiliary structure 3 is assembled at the printing end of the coaxial fuse additive structure 2 and is in the same motion path as the printing head of the coaxial fuse additive structure 2;

[0047] Among them, the ultrasonic forging auxiliary structure 3 includes a mounting frame 31, which is a mounting arm structure with multiple rotation nodes, and each node has a detachable free angle adjustment capability, and one end of the mounting frame is fixed to the front side of the coaxial fuse additive structure 2 by a bolt. The mounting frame 31 is connected to the ultrasonic generator group 32 by a bolt at the end away from the coaxial fuse additive structure 2. The ultrasonic generator group 32 has three output interfaces, and each interface is electrically connected to a transducer 33. The transducer 33 is fixed to the mounting sleeve of the hanging bracket 34 by bolts, and is suspended and positioned directly below the ultrasonic generator group 32 from the top, left and right directions by the hanging bracket 34. The hanging bracket 34 consists of a mounting sleeve and a bracket that can adjust the height, lateral distance and angle. The vibration kit 341 is composed of a body, wherein the openings of the mounting sleeves on the left and right sides are connected with a sheep's foot-shaped vibration kit 341 by bolts, and the inner ring surface of the vibration kit 341 is sealed and slidably provided with a sealing ring 342 of the same shape. The interior of the vibration kit 341 stores a safe and high-temperature resistant fluid material. The sealing ring 342 is composed of a ring body fixed on the output rod of the transducer 33 and a ring piece slidably provided inside the vibration kit 341, and the ring piece is limited and reset by the sliding of the vibration kit 341 inside the vibration kit through the vibration spring 3421 fixed on the side. The frame of the hanging bracket 34 in the middle position has a specified length of disconnection distance, and the upper and lower sections at the disconnection position are fixed to the hydraulic pipe 344 and the piston rod 3441 respectively, wherein the hydraulic pipe 3 344, and the lower end of the spring is fixed to the piston rod 3441 which is slidingly arranged inside the hydraulic pipe 344. An interface is provided on the upper side of the hydraulic pipe 344, and the interface is fixedly sealed with the interface provided on the upper side of the spring rod 362 through the pipeline, so as to communicate with the inside of the hydraulic pipe 344 and the spring rod 362. The spring rod 362 is composed of a hydraulic pipe 344 and a piston rod 3441, and the hydraulic pipe 344 and the spring rod 362 both store high-temperature resistant safety fluid, and the upper end of the spring rod 362 is rotatably connected to the fixing screw 361, and the upper end of the fixing screw 361 is threadedly connected to the screw hole opened inside the movable end of the mounting bracket 31, and the pipe body of the spring rod 362 is fixed to the connecting rod 31 respectively. The two ends and the lower surface of the dragon ridge 36 are connected, and the ultrasonic auxiliary ridges 35 corresponding to the lower surface of the dragon ridge 36 are evenly distributed in an array along the path, and the lower ends of the spring rods 362 are fixed to the upper surface of the ultrasonic auxiliary ridge 35. Only the tube body of the spring rod 362 connected to the hydraulic pipe 344 stores high-temperature resistant safety fluid. The ultrasonic auxiliary ridge 35 is composed of three U-shaped bodies of the same shape, and the three U-shaped bodies are movably connected by a universal shaft 351. Each U-shaped body of the ultrasonic auxiliary ridge 35 has a U-shaped space along the internal path, and the U-shaped space is open in the direction of the additive workpiece, and the ultrasonic auxiliary ridge 35 is fixed with a heating plate 354 with high thermal conductivity through the U-shaped space. The upper part of the ultrasonic auxiliary ridge 35 is connected to a rolling seat 355 by bolts.The inner part of the rolling seat 355 is provided with a rolling ball, and the movement of the upper surface of the additive workpiece is performed thereby. The upper surface of the ultrasonic auxiliary ridge 35 is symmetrically fixed with an electric heating component 352 and a hot fluid heat pipe 353 on both sides of the spring rod 362, wherein the electric heating component 352 is located on the side close to the transducer 33, and the upper surface of the electric heating component 352 is integrally provided with an interface for electrical connection with the electric control module configured on the surface of the coaxial fuse additive structure 2, and the electric heating end of the electric heating component 352 is inserted into the interior of the ultrasonic auxiliary ridge 35 and contacts the heating plate 354. The interior of the hot fluid heat pipe 353 is filled with a fluid material with high heat conductivity, and the fluid material contacts the heating plate 354. The connecting dragon ridge 36 is a multi-node spine-shaped frame with freely adjustable angles. Its end close to the coaxial fuse additive structure 2 is movably connected to the vibration pressure piece 343 on the lower surface through the spring rod 362. The vibration pressure piece 343 is also a U-shaped body, and the plates on both sides of the vibration pressure piece 343 The body is provided with a slide groove which is open to the direction of the additive workpiece, and the internal sliding seal of the slide groove is provided with a piston pressure plate 3431. The surface of the vibration pressure piece 343 is provided with an interface corresponding to the slide groove, and is connected to the interior of the vibration kit 341 under the cooperation of the interface and the pipeline. The piston pressure plate 3431 is provided with several auxiliary sliding slide rods on the side away from the additive workpiece, and the slide rod sliding seal is inserted into the sliding hole corresponding to the vibration pressure piece 343, and the dragon spine 36 is connected by being sleeved on the coaxial fuse additive workpiece. The lower end of structure 2 features a forward auxiliary ridge 37, flexibly coupled to a spring rod 362 on the opposite side of the vibrating member 343. This ridge 37 also consists of three U-shaped bodies flexibly connected by a universal joint 351. The interior of the U-shaped body near the coaxial fuse additive structure 2 features a groove facing the additive workpiece. A heat conducting plate 371 is fixedly mounted within the groove. This plate conducts heat to the hot fluid heat conducting pipe 353 via a pipe lined with a highly thermally conductive material.

[0048] During operation, when the coaxial fusible additive structure 2 prints the sediment layer, the heat is transferred to the front auxiliary ridge 37 and absorbed by the heat conducting plate 371. The heat is then transferred to the heat conducting pipe 353 through the heat conducting pipe to heat the heat conducting material, and then transferred to the heating plate 354 to preheat the sediment layer. The surface electric heating component 352 of the ultrasonic auxiliary ridge 35 near the transducer 33 will also heat the sediment layer to a suitable ultrasonic and micro-forging temperature. After the new sediment layer is heated, it enters the transducer 33 area. The ultrasonic generator group 32 generates ultrasonic waves, which the transducer 33 converts into mechanical vibrations to act on the sediment layer. , perform ultrasonic and micro-forging. If the ultrasonic auxiliary ridge 35 near the transducer 33 encounters fluctuations in the sedimentation layer, the safety fluid in the spring rod 362 tube body will flow in and out of the hydraulic pipe 344, causing the piston rod 3441 to move up and down, thereby adjusting the distance between the transducer 33 and the sedimentation layer, improving the density of the sedimentation layer and controlling deformation. At the same time, the vibration of the transducer 33 drives the sealing ring 342 to vibrate, causing the safety fluid to push the piston pressure plate 3431 to push the sedimentation layer at a high frequency, avoiding the high temperature of the droplets causing them to extend excessively to both sides, thereby improving the flatness of both sides of the sedimentation layer.

[0049] In summary, the ultrasonic forging auxiliary structure 3 is used to perform various treatments on the sedimentation layer during printing. On the one hand, the sedimentation layer is heated to a suitable ultrasonic and micro-forging temperature through the synergistic effect of the hot fluid heat pipe 353, the heating plate 354 and the electric heating component 352, so that the sedimentation layer can undergo better microstructural changes during the subsequent ultrasonic and micro-forging process. On the other hand, during the ultrasonic and micro-forging process, when the new sedimentation layer has undulations, the fluctuating movement of the ultrasonic auxiliary ridge 35 will prompt the distance between the transducer 33 and the sedimentation layer to be dynamically adjusted, thereby increasing or reducing the degree of vibration on the sedimentation layer in the undulating area. This method can effectively improve the sedimentation layer. density, reducing the microstructural inhomogeneity caused by temperature gradient, thereby improving the mechanical properties of the parts. At the same time, the vibration of the transducer 33 drives the sealing ring 342 to vibrate, so that the safety fluid pushes the piston pressure plate 3431 to perform high-frequency pushing on the precipitation layer after 2 drops of coaxial fuse additive structure, avoiding the situation where the precipitation layer excessively extends to both sides due to the high temperature of the liquid. This helps to control the lateral dimensional stability of the precipitation layer, reduce the surface unevenness caused by uneven extension, and further improve the flatness of both sides of the precipitation layer, thereby improving the surface quality of the printed workpiece, reducing the surface roughness, and making it closer to the ideal design requirements.

[0050] As an embodiment of the present invention, Figure 7 and Figure 8 As shown, the U-shaped body close to the front auxiliary ridge 37 of the coaxial fuse additive structure 2 is fixed with a linkage frame 386 on the side facing the coaxial fuse additive structure 2. The linkage frame 386 is composed of an S-shaped connecting rod and a circular ring located directly below the coaxial fuse additive structure 2, and the upper ring surface of the circular ring is fixed with a sliding rod inserted into the interior of the pressure chamber 384 through the upper end and the sliding seal is set in the pressure ring 385 inside the pressure chamber 384. The pressure chamber 384 is annular and is opened below the inside of the ring body of the dripper 38, and a high-temperature resistant safety fluid is stored inside the pressure ring 385. The inside of the ring body of the dripper 38 is provided with an L-shaped channel along the axial ring array of the dripper 38 above the pressure chamber 384, and the hole One end of the channel is open to the ring of the dripper 38, and at the open end, a ring frame fixed on the inner ring surface of the dripper 38 is cooperated to slide the piston push rod 382 inside the channel. A sliding hole for the piston push rod 382 to slide is opened inside the ring frame on the inner ring surface of the dripper 38 at the position corresponding to the pressure ring 385, and the piston push rod 382 is limited and reset in the axial direction by a pressure spring 383 inside the sliding hole of the ring frame. One end of the piston push rod 382 is inserted through the ring frame and fixed to the elastic plate on the lower side of the guide nozzle 381. The guide nozzle 381 is fixedly connected to the upper part of the ring of the dripper 38, and the dripper 38 is fixed to the drip hole position at the lower end of the coaxial fuse additive structure 2 by bolts.

[0051] During printing, the coaxial fused wire additive structure 2 uses beam shaping technology, with wire as the deposition material. The laser beam is coaxial with the wire. Under program control, the wire is melted and then stacked layer by layer along a preset path to form a three-dimensional solid part. The molten wire falls into the guide nozzle 381, and then drips from the lower end of the dripper 38 through the guide nozzle 381 onto the surface of the substrate or the lower sediment layer. The forward auxiliary ridge 37 lies on the surface of the lower sediment layer under the action of the spring rod 362. As the coaxial fused wire additive structure 2 continues to print, the forward auxiliary ridge 37 will move along the upper surface of the lower sediment layer, and fluctuations will occur due to the depression of the sediment layer. The linear movement trajectory drives the linkage frame 386 to fluctuate up and down, thereby causing the pressure ring 385 to slide up and down along the inner wall of the pressure chamber 384, pulling the safety fluid in the pressure chamber 384, and allowing the piston push rod 382 to slide back and forth along the inner wall of the dripper 38. The moving piston push rod 382 compresses the pressure spring 383 and presses the elastic plate under the guide nozzle 381, dynamically adjusting the radius of the lower port of the guide nozzle 381, that is, the port shrinks when the forward auxiliary ridge 37 moves upward, and expands outward when it moves downward, thereby dynamically adjusting the dripping aperture of the molten wire at the lower end of the coaxial fusible filament additive structure 2, thereby improving the flatness of the precipitation layer.

[0052] To sum up, by arranging a special guide nozzle 381 and related linkage components at the lower end of the coaxial fusible filament additive structure 2, during the printing process, the fluctuating movement of the front auxiliary ridge 37 drives the linkage frame 386, and then adjusts the piston push rod 382 to dynamically adjust the radius of the lower port of the guide nozzle 381, so that the port of the guide nozzle 381 can accurately control the dripping aperture of the molten wire according to the movement of the front auxiliary ridge 37, which can effectively avoid the uneven precipitation layer caused by uneven dripping of the wire, and make the precipitation layer printed by the coaxial fusible filament additive structure 2 smoother, thereby improving the overall printing quality.

[0053] As an embodiment of the present invention, Figure 7 As shown, the two U-shaped bodies away from the coaxial fuse additive structure 2 are provided with a cleaning liquid tank 372 inside the upper plate body, and the cleaning liquid tank 372 immerses the rolling balls through a liquid channel connected to the inside of the rolling seat 355. The rolling seats 355 are also connected to the top of the front auxiliary ridge 37 and the connecting dragon ridge 36 by bolts, and the front auxiliary ridge 37 is evenly provided with rolling oil grooves on the surface of the rolling balls of the two rolling seats 355 away from the coaxial fuse additive structure 2.

[0054] During operation, the forward auxiliary ridge 37 away from the coaxial fuse additive structure 2 will roll the cleaning liquid in the cleaning liquid tank 372 onto the surface of the precipitation layer to dissolve dirt and improve the connectivity between the upper and lower layers.

[0055] In summary, during its movement, the forward auxiliary ridge 37, located away from the coaxial fusible additive structure 2, can roll the cleaning liquid in the cleaning liquid reservoir 372 onto the surface of the deposited layer, effectively dissolving dirt on the surface of the deposited layer. This not only cleans the surface of the deposited layer but also improves the contact between the upper and lower deposited layers, making the connection between them tighter and more secure, reducing interlayer bonding problems caused by factors such as surface dirt, and improving the structural integrity of the entire printed workpiece.

[0056] Working principle: When working, firstly, the position, posture and motion trajectory of the coaxial fuse additive structure 2 are precisely controlled by the robot arm 1 in a pre-programmed or taught reproduction manner, so that the robot arm 1 can drive the coaxial fuse additive structure 2 to move along the specified path to complete the printing of the specified workpiece, such as a cylindrical workpiece. Then, according to the radius of the cylindrical workpiece, the mounting frame 31, the ultrasonic auxiliary ridge 35, the connecting dragon ridge 36 and the forward auxiliary ridge 37 are adjusted so that the mounting frame 31, the ultrasonic auxiliary ridge 35, the connecting dragon ridge 36 and the forward auxiliary ridge 37 can move along the circumferential path of the cylindrical workpiece. At the same time, the transducer 33, the hanging bracket 34, the ultrasonic auxiliary ridge 35, the vibrating pressure piece 343 and the forward auxiliary ridge 37 are adjusted according to the printed workpiece. The transducer 33, the ultrasonic auxiliary ridge 35, the vibrating pressure piece 343 and the forward auxiliary ridge 37 can be in active contact with the sedimentation layer of the cylindrical workpiece, and then the cylindrical workpiece is printed; during the printing process, the coaxial fuse additive structure 2 will adopt beam shaping technology, with wire as the deposition material, and by making the laser beam coaxial with the wire, the wire will be melted under program control and then stacked layer by layer according to a preset path, thereby manufacturing a three-dimensional solid part. During this process, the molten wire will fall into the interior of the guide nozzle 381, and pass through the guide nozzle 381 and drip from the lower end of the dripper 38 onto the surface of the substrate or the lower sedimentation layer. At this time, the forward auxiliary ridge 37 will be attached to the surface of the lower sedimentation layer under the action of the spring rod 362. As the coaxial fuse additive structure 2 is driven by the robot arm 1, During the continuous printing operation, the front auxiliary ridge 37 will also move along the upper surface of the lower sedimentation layer. During the movement, the different degrees of depression of the sedimentation layer passed through will cause the front auxiliary ridge 37 to have a fluctuating movement trajectory, and the fluctuating movement of the front auxiliary ridge 37 will drive the linkage frame 386 to fluctuate up and down, and then the fluctuating linkage frame 386 will pull the pressure ring 385 up and down to slide along the inner wall of the pressure chamber 384, and the sliding pressure chamber 384 will pull the safety fluid stored in the pressure chamber 384 up and down, so that the safety fluid pulls the piston push rod 382 to slide back and forth along the inner wall of the dripper 38, and then the moving piston push rod 382 will press the lower elastic plate of the guide nozzle 381 while compressing the pressure spring 383, thereby The radius of the lower port is adjusted so that the port of the guide nozzle 381 shrinks when the front auxiliary ridge 37 moves upward, and expands outward when the front auxiliary ridge 37 moves downward, thereby dynamically adjusting the aperture of the molten wire dripping at the lower end of the coaxial fuse additive structure 2, so that the precipitation layer printed by the coaxial fuse additive structure 2 is smoother, which is more conducive to improving the smoothness of the precipitation layer. At the same time, when the coaxial fuse additive structure 2 prints the precipitation layer, the heat radiation is conducted to the position of the front auxiliary ridge 37 and absorbed by the heat conduction plate 371. Then, the heat conduction plate 371 conducts the heat to the position of the hot fluid heat conduction pipe 353 through the designated heat conduction pipeline, heating the heat conductive material inside the hot fluid heat conduction pipe 353, and then the heat conductive material conducts the heat to the heating plate 354, heating the heating plate 354.Then the heating plate 354 will conduct the heat to the surface of the sedimentation layer between the first two ultrasonic auxiliary ridges 35 to preheat the sedimentation layer. At the same time, the electric heating component 352 on the surface of the ultrasonic auxiliary ridge 35 close to the transducer 33 will heat the heating plate 354 in the form of electric heat, and radiate the heat to the surface of the sedimentation layer covered by the ultrasonic auxiliary ridge 35 through the heating plate 354, heating the sedimentation layer to a suitable ultrasonic and micro-forging temperature. The front auxiliary ridge 37 away from the side of the coaxial fuse additive structure 2 will also cooperate with the rolling seat 355 and the spring rod 362 to move along the surface of the lower sedimentation layer, and in the process of moving, the cleaning liquid stored in the cleaning liquid tank 372 will be rolled on the surface of the sedimentation layer to clean the sedimentation layer. The dirt on the surface of the layer is dissolved and cleaned, which is more conducive to improving the connectivity between the upper and lower sedimentation layers. After the newly printed sedimentation layer is heated to the appropriate ultrasonic and micro-forging temperature, it will enter the area of ​​the transducer 33, and the ultrasonic generator group 32 will produce ultrasonic waves. Then the transducer 33 will convert the ultrasonic waves into mechanical vibrations, and act on the surface of the sedimentation layer from the output end, and apply ultrasonic waves and micro-forging to the top and both sides of the sedimentation layer at the same time. At the same time, the ultrasonic auxiliary ridge 35 close to the side of the transducer 33 will cooperate with the spring rod 362 and the rolling seat 355 to move along the new sedimentation layer. If the new sedimentation layer still has undulations, these undulations will cause the ultrasonic auxiliary ridge 35 close to the side of the transducer 33 to move in a fluctuating manner. The ultrasonic vibration caused by the fluctuating movement The acoustic auxiliary ridge 35 will support and pull back the piston rod 3441 of the spring rod 362, so that the spring rod 362 squeezes or pulls the safety fluid inside the tube body of the spring rod 362 to enter or flow out of the hydraulic pipe 344. Then the fluid entering or flowing out of the hydraulic pipe 344 will press the piston rod 3441 to stretch the spring and move downward or pull the piston rod 3441 along the inner wall of the hydraulic pipe 344 to compress the spring and move upward. The downward or upward moving piston rod 3441 will push down or pull up the transducer 33 on the upper side, so that the transducer 33 is closer to or farther away from the sediment layer, increasing or reducing the degree of vibration of the transducer 33 on the sediment layer in the undulating area, thereby effectively improving the density of the sediment layer and controlling The deformation of the deposited layer achieves the best printing effect. At the same time, the vibrating transducer 33 drives the vibration movement of the sealing ring 342 fixed on its output rod. The vibrating sealing ring 342 vibrates the safety fluid inside the spring and the vibration kit 341, causing the safety fluid to hydraulically push the piston pressure plate 3431. The piston pressure plate 3431 then applies high-frequency pressure to the deposited layer after the coaxial fused additive structure 2 drops of liquid. This prevents excessive extension to the sides of the deposited layer due to the high temperature of the liquid during printing. This can further improve the flatness of both sides of the deposited layer, and thus achieve high-quality printing of additive workpieces until the printing is completed.

[0057] It should be noted that the surfaces of the ultrasonic auxiliary ridge 35, the vibrating pressure piece 343 and the forward auxiliary ridge 37 that are attached to the additive workpiece are provided with a specified curvature according to the radius of the workpiece; the necessary active contact parts of the ultrasonic forging auxiliary structure 3 and the additive workpiece, substrate, etc. are isolated by wear-resistant and high-temperature resistant materials; the forward auxiliary ridge 37 and the vibrating pressure piece 343 close to the side of the coaxial fuse additive structure 2 are both arranged close to the dripper 38; there is no rolling seat 355 above the inner side of the vibrating pressure piece 343.

[0058] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. Ultrasonic forging assisted processing device based on coaxial fused wire additive process, including: A robotic arm (1) comprising a base, an arm, a wrist and a mounting arm, capable of precisely controlling the position, posture and motion trajectory of a coaxial fuse additive structure (2) by pre-programming or teaching and reproducing; The coaxial fused wire additive structure (2) adopts beam shaping technology, uses wire as deposition material, melts the wire under program control and deposits it layer by layer along a preset path by making the laser beam coaxial with the wire, and is connected to the end of the mounting arm of the robot arm (1) by bolts, and is characterized by: An ultrasonic forging auxiliary structure (3) is assembled at the printing end of the coaxial fuse additive structure (2) and is located in the same motion path as the printing head of the coaxial fuse additive structure (2); The ultrasonic forging auxiliary structure (3) includes a mounting frame (31), the mounting frame (31) is connected to an ultrasonic generator group (32) by bolts at one end away from the coaxial fuse additive structure (2), the transducer (33) of the ultrasonic generator group (32) is fixed in the mounting sleeve of the hanging bracket (34) by bolts, and the hanging bracket (34) is composed of a mounting sleeve and a frame body, wherein the openings of the mounting sleeve on the left and right sides are connected to a vibration kit (341) by bolts, and the interior of the vibration kit (341) is sealed and slidably provided with a sealing ring (342), and the sealing ring (342) is limited by a vibration spring (3421) fixed on the side to slide inside the vibration kit (341). and reset, the frame of the hoisting bracket (34) located in the middle position has a disconnection distance of a specified length, and the upper and lower sections at the disconnection position are respectively fixed to the hydraulic pipe (344) and the piston rod (3441), and an interface is provided above the side surface of the hydraulic pipe (344), and the interface is communicated with the interface provided on the upper side surface of the spring rod (362) through a pipeline, and the tube body of the spring rod (362) is respectively fixed to the two ends and the lower surface of the connecting dragon spine (36), and the corresponding ultrasonic auxiliary ridges (35) are distributed in an equidistant array along the path on the lower surface of the connecting dragon spine (36), and the lower ends of the spring rods (362) are fixed to the upper surface of the ultrasonic auxiliary ridge (35), and each U-shaped body of the ultrasonic auxiliary ridge (35) A heating plate (354) is fixed inside, and a rolling seat (355) is connected to the upper part of the ultrasonic auxiliary ridge (35) by bolts, and a rolling ball is set inside the rolling seat (355). The upper surface of the ultrasonic auxiliary ridge (35) is fixed with an electric heating component (352) and a hot fluid heat pipe (353) in a symmetrical manner on both sides of the spring rod (362). The end of the connecting dragon ridge (36) close to the coaxial fuse additive structure (2) is movably connected to the vibration pressure piece (343) on the lower surface through the spring rod (362). The plate bodies on both sides of the vibration pressure piece (343) are open to the direction of the additive workpiece and a slide groove is opened, and the internal sliding seal of the slide groove is provided with a piston pressure plate (3431). The surface of the component (343) is provided with an interface corresponding to the slide groove, and is connected to the interior of the vibration kit (341) under the cooperation of the interface and the pipeline. The connecting dragon ridge (36) is provided with a forward auxiliary ridge (37) on the opposite side of the vibration pressure component (343) through the kit set on the lower end of the coaxial fuse additive structure (2) in cooperation with the spring rod (362). The forward auxiliary ridge (37) is fixedly provided with a heat conducting plate (371) inside the U-shaped body close to the coaxial fuse additive structure (2), and the heat conducting plate (371) conducts heat to the hot fluid heat conducting pipe (353) through a pipeline with a high thermal conductivity material inside. The forward auxiliary ridge (37) is fixedly provided with a linkage frame (386) on the side facing the coaxial fuse additive structure (2).The linkage frame (386) is fixed to the pressure ring (385) inside the pressure chamber (384) opened inside the dripper (38) through a sliding rod and a sliding seal. An L-shaped centripetal open channel is opened inside the ring body of the dripper (38) above the pressure chamber (384) along the axis ring array of the dripper (38), and the ring frame fixed on the inner ring surface of the dripper (38) is matched at the open end to slide the piston push rod (382) inside the channel. One end of the piston push rod (382) is inserted through the ring frame and fixed to the elastic plate on the lower side of the guide nozzle (381).

2. The ultrasonic forging-assisted processing device based on the coaxial fused wire additive process according to claim 1 is characterized in that: The mounting frame (31) is a mounting arm structure with multiple rotation nodes, and each node has a detachable free angle adjustment capability, and one end thereof is fixed to the front side of the coaxial fuse additive structure (2) by means of bolts.

3. The ultrasonic forging-assisted processing device based on the coaxial fused wire additive process according to claim 1 is characterized in that: A spring is fixed above the interior of the hydraulic pipe (344), and the lower end of the spring is fixed to a piston rod (3441) that is slidingly arranged inside the hydraulic pipe (344) via a piston end.

4. The ultrasonic forging-assisted processing device based on the coaxial fused wire additive process according to claim 1 is characterized in that: The spring rod (362) comprises a hydraulic pipe (344) and a piston rod (3441), and the hydraulic pipe (344) and the spring rod (362) both store high-temperature resistant safety fluid. The upper end of the spring rod (362) tube body is rotatably connected to a fixed screw (361), and the upper end of the fixed screw (361) is threadedly connected to a screw hole opened inside the movable end of the mounting frame (31). Only the tube body of the spring rod (362) connected to the hydraulic pipe (344) stores high-temperature resistant safety fluid.

5. The ultrasonic forging-assisted processing device based on the coaxial fused wire additive process according to claim 1 is characterized in that: The ultrasonic auxiliary ridge (35) is composed of three U-shaped bodies of the same shape, and the three U-shaped bodies are movably connected via a universal shaft (351).

6. The ultrasonic forging-assisted processing device based on the coaxial fused wire additive process according to claim 1 is characterized in that: The electric heating component (352) is located on a side close to the transducer (33), and an interface for electrically connecting to an electric control module configured on the surface of the coaxial fuse additive structure (2) is integrally provided on the upper surface of the electric heating component (352), and the electric heating end of the electric heating component (352) is inserted into the interior of the ultrasonic auxiliary ridge (35) and contacts the heating plate (354), and the interior of the thermal fluid heat pipe (353) is filled with a fluid material with high thermal conductivity, and the fluid material contacts the heating plate (354).

7. The ultrasonic forging-assisted processing device based on the coaxial fused wire additive process according to claim 1 is characterized in that: The two U-shaped bodies away from the coaxial fuse additive structure (2) are provided with a cleaning liquid tank (372) inside the upper plate body, and the cleaning liquid tank (372) immerses the rolling ball through a liquid channel connected to the inside of the rolling seat (355). The upper part of the front auxiliary ridge (37) and the connecting dragon ridge (36) is also connected to the rolling seat (355) by bolts, and the front auxiliary ridge (37) is evenly provided with rolling oil grooves on the surface of the rolling ball of the two rolling seats (355) away from the coaxial fuse additive structure (2).

8. The ultrasonic forging-assisted processing device based on the coaxial fused wire additive process according to claim 1 is characterized in that: The pressure chamber (384) is annular and is opened below the inner portion of the ring body of the dripper (38), and stores a high-temperature resistant safety fluid above the pressure ring (385).

9. The ultrasonic forging-assisted processing device based on the coaxial fused wire additive process according to claim 1, characterized in that: A sliding hole for the piston push rod (382) to slide is provided inside the ring frame on the inner ring surface of the dripper (38) at a position corresponding to the pressure ring (385), and the piston push rod (382) is limited in movement in the axial direction and reset in the sliding hole of the ring frame by a pressure spring (383).

10. The ultrasonic forging-assisted processing device based on the coaxial fused wire additive process according to claim 1, characterized in that: The guide nozzle (381) is fixedly connected to the upper part of the dripper (38) ring, and the dripper (38) is fixed to the drip hole position at the lower end of the coaxial fuse additive structure (2) by means of bolts.

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