CN116811238B - 3D printing head with laser preheating and in-situ compaction and operation method thereof - Google Patents
3D printing head with laser preheating and in-situ compaction and operation method thereof Download PDFInfo
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- CN116811238B CN116811238B CN202310571466.6A CN202310571466A CN116811238B CN 116811238 B CN116811238 B CN 116811238B CN 202310571466 A CN202310571466 A CN 202310571466A CN 116811238 B CN116811238 B CN 116811238B
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Abstract
The invention provides a 3D printing head with laser preheating and in-situ compaction, which comprises a printing head mounting plate; a pneumatic sliding block is arranged at the upper left side of the printing head mounting plate; the upper mounting seat of the wire feeding mechanism and the lower mounting seat of the wire feeding mechanism are respectively arranged on the printing head mounting plate; a driving wire feeding wheel and a driven wire feeding wheel are arranged between an upper wire feeding mechanism mounting seat and a lower wire feeding mechanism mounting seat, a laser mounting bracket is arranged on the right side of the printing head mounting plate, a laser is arranged on the laser mounting bracket, and the lower wire feeding mechanism mounting seat is connected with the chopping block through a pre-soaking wire to a Teflon tube; wherein the nozzle is mounted on the anvil block; and a pneumatic wire cutting structure is arranged below the pneumatic sliding block. The invention adopts the high-energy laser beam to preheat the deposited prepreg wires in real time, improves the interlayer heating efficiency in the printing process, is beneficial to improving the interface temperature during interlayer fusion and improves the interlayer combination of the workpieces.
Description
Technical Field
The invention relates to the technical field of continuous fiber reinforced composite material 3D printing, in particular to a 3D printing head with laser preheating and in-situ compaction and an operation method thereof.
Background
Continuous fiber reinforced thermoplastic Composites (CFRTP) are composites prepared with continuous fibers as the reinforcing material and thermoplastic resins as the matrix. The continuous fiber reinforced thermoplastic composite material member has the advantages of light weight, high strength, excellent mechanical property and the like, is widely applied to various fields such as aerospace, national defense and military industry, transportation, energy and the like at present, and is continuously expanded to the civil field.
The 3D printing of the continuous fiber reinforced composite material is a novel additive manufacturing technology, and the continuous fiber reinforced composite material is formed by melt extrusion of continuous fiber prepreg filaments in a spray head and stacking layers by layers along with the movement of the 3D printing spray head to form an integral structure. Compared with the traditional composite material forming process, 3D printing has the advantages of no need of a die, low cost, integrated forming and the like, and along with the development of the continuous fiber reinforced composite material 3D printing technology, the manufacturing cost of the continuous fiber reinforced composite material is reduced, and the application field of the composite material is further expanded. However, the fuse manufacturing and forming (FFF) process used for 3D printing of continuous fibers has problems of low forming efficiency, high fiber damage, poor performance of the product, and the like.
Current continuous fiber reinforced composite 3D printheads are mostly based on FFF technology, where prepreg filaments are melted by a heated block and extruded through a printing nozzle. In the extrusion process, the prepreg filaments are rapidly cooled, so that the fusion temperature of an interlayer interface is low, and the interlayer bonding of a finished piece is poor. Meanwhile, compared with the traditional composite material forming process, in the 3D printing process, stable pressure is difficult to provide when the layers are combined, so that the bonding strength between the workpiece layers is poor. In order to further improve the forming efficiency and the product performance of 3D printing of the continuous fiber composite material, a novel printing forming process and a novel printing forming device are lacking at present, in-situ preheating and compaction are carried out when an interlayer interface is formed, the interlayer bonding performance of the 3D printing continuous fiber composite material product is improved, and the effective application of the 3D printing technology of the continuous fiber composite material in the fields of aerospace, national defense, military industry, rail transit and the like is promoted.
Disclosure of Invention
In order to solve the problems, the invention discloses a 3D printing head with laser preheating and in-situ compaction and an operation method thereof; laser real-time preheating is carried out in the 3D printing process, the interlayer fusion temperature is improved, the interlayer fusion process is promoted, meanwhile, the compaction roller is adopted for real-time compaction after printing, controllable forming pressure is provided in the forming process, and the interlayer bonding strength of a workpiece is improved.
A3D printing head with laser preheating and in-situ compaction comprises a printing head mounting plate, wherein a pneumatic sliding block is arranged at the upper left side of the printing head mounting plate, the pneumatic sliding block controls the up-down lifting of the whole printing head after ventilation, and the pressure applied during printing and forming is adjusted by controlling the air pressure.
Further, an upper mounting seat of the wire feeding mechanism and a lower mounting seat of the wire feeding mechanism are arranged on the right of the pneumatic sliding block, a driving wire feeding wheel and a driven wire feeding wheel are arranged between the upper mounting seat of the wire feeding mechanism and the lower mounting seat of the wire feeding mechanism, wherein the driving wire feeding wheel is arranged on a rotating shaft of the stepping motor, the stepping motor controls the driving wire feeding wheel to rotate, and the driving wire feeding wheel and the driven wire feeding wheel are attached to each other to drive wires to be further conveyed forwards.
Further, the last mount pad of wire feeding mechanism is connected with the metal swing arm, and the metal swing arm is installed on the rotation axis of steering wheel, steering wheel control metal swing arm rotates, when the metal swing arm clockwise rotation, drive the last mount pad of wire feeding mechanism and rotate anticlockwise around its upper left side mounting hole, initiative wire feed wheel and driven wire feed wheel closely laminate this moment, can cooperate step motor to accomplish the wire feed action, when the metal swing arm anticlockwise rotation, drive the last mount pad of wire feeding mechanism and rotate clockwise around its upper left side mounting hole, initiative wire feed wheel and driven wire feed wheel separation this moment, the presoaking wire is in free state this moment.
Further, a pneumatic wire cutting structure is arranged below the pneumatic sliding block, so that the presoaked wire cutting function in the printing process can be realized, and the wire cutting mechanism is connected with the printing head mounting plate through a wire cutting mechanism mounting bracket.
Further, a thumb cylinder is arranged at the upper left of the installation support of the wire cutting mechanism, the pneumatic telescopic end of the thumb cylinder is connected with a blade installation seat, a cutter is arranged at the other end of the blade installation seat, the edge side of the cutter can extend into a groove on an anvil block, and a Teflon tube is arranged between the upper part of the anvil block and the lower installation seat of the wire feeding mechanism to serve as a wire feeding channel.
Further, when the thumb cylinder controls the blade mounting seat to retract to the upper left, the cutter is separated from the inner wall of the groove of the anvil block, and at the moment, the prepreg filaments can pass through the filament bundle conveying channel in the anvil block and pass through the printing nozzle, when the thumb cylinder controls the blade mounting seat to extend to the lower right, the cutter approaches to the inner wall of the groove of the anvil block at a high speed, and the prepreg filaments are cut off to finish the filament cutting action.
Further, a metal compacting roller is arranged below the printing nozzle, so that the prepreg filaments conveyed from the printing nozzle can be compacted and printed.
Further, a laser mounting bracket is arranged on the right side of the printing head mounting plate, a laser is arranged on the laser mounting bracket, and laser emitted by the laser directly irradiates the prepreg filaments output from the printing nozzle, so that the prepreg filaments are heated and melted.
Furthermore, in order to realize the adjustment of the laser irradiation landing point, the mounting hole at the joint of the printing head mounting plate and the laser mounting bracket is arc-shaped, and the laser can be controlled to rotate by adjusting the mounting position on the arc-shaped hole, so that the change of the laser irradiation landing point is realized.
The preheating temperature of the laser is selected according to the material, such as printing PLA-based composite material, selecting the preheating temperature of 200 ℃, printing PEEK-based composite material, selecting the preheating temperature of 400 DEG C
Further, install infrared depth camera on the print head mounting panel, can real-time supervision print process laser landing position, and print head mounting panel top and install the piston piece support, install the piston piece of steerable flexible length between piston piece support and laser installation support, can adopt infrared depth camera to monitor laser landing in the printing process to thereby through the flexible real-time control laser installation support rotation of piston piece adjustment laser landing position, realize the accurate heating of printing process.
Further, in order to realize 3D printing of the continuous fiber composite material with high interlayer bonding performance, the prepreg wires are mutually matched through the driving wire feeding wheel and the driven wire feeding wheel, the prepreg wires are conveyed into the Teflon tube, then the prepreg wires continue to pass through the Teflon tube, enter a wire bundle conveying channel in an anvil block, are output from a nozzle and reach the position right below a metal compacting roller, and finished piece printing is started. When the workpiece is printed, the laser is started, the laser beam directly irradiates the prepreg filaments in the printing, meanwhile, the preheating compaction of the 3D printing continuous fiber composite material is finished under the compaction action of the metal compaction roller, and the interlayer bonding strength is improved.
Further, the infrared depth camera of printing process real-time supervision printing process laser landing position, when the circumstances that laser irradiation point deviates appears in the printing process, infrared depth camera output control signal, thereby the flexible real-time control laser installation support of control piston piece rotates adjustment laser landing position, realizes the accurate heating of printing process.
Further, after the printing of the workpiece is finished, the thumb cylinder drives the cutter to cut off the prepreg filaments, the cutter edge is a straight edge, and under the control of the cylinder, the edge is impacted to the groove wall on the anvil block at a high speed, so that the cutting of the prepreg filaments is finished.
Further, after the prepreg filaments are cut, the thumb cylinder controls the cutter to retract, at which time the prepreg filaments can continue through the tow channels in the anvil block 10 for subsequent printing processes.
Further, the distance between the position of the cutter and the compacting position of the compacting roller is 10mm-15mm, short-range yarn breakage is realized, and the phenomenon that the fiber deflects due to the tension-free state of the printing yarn after the yarn bundle is cut is reduced.
A method of operating a 3D printhead with laser pre-heating and in situ compaction, comprising the steps of:
step 1: the presoaked wire is mutually matched with a driving wire feeding wheel and a driven wire feeding wheel, the presoaked wire is conveyed into the Teflon tube, then continuously passes through the Teflon tube, enters a wire bundle conveying channel in an anvil block, is output from a nozzle and reaches the position right below a metal compacting roller, and the printing of a finished piece is started;
Step 2: when the workpiece is printed, the laser is started, the laser beam directly irradiates the prepreg filaments in the printing, meanwhile, the preheating compaction of the 3D printing continuous fiber composite material is finished under the compaction action of the metal compaction roller, the interlayer bonding strength is improved, and the compaction pressure is applied by adjusting the air pressure in the pneumatic sliding block.
Step 3: the infrared depth camera of printing process real-time supervision printing process laser drop position, when the circumstances that laser irradiation point deviates appears in the printing process, infrared depth camera output control signal, thereby the flexible real-time control laser installation support of control piston piece rotates adjustment laser drop position, realizes the accurate heating of printing process.
Step 4: after the printing of the workpiece is finished, the thumb cylinder drives the cutter to cut off the prepreg filaments, the cutter edge is a straight edge, and under the control of the cylinder, the edge is impacted to the groove wall on the anvil block at a high speed, so that the cutting of the prepreg filaments is finished.
Step 5: after further pre-preg is cut, the thumb cylinder controls the cutter to retract, and at this time, the pre-preg can continue to pass through the tow channel in the anvil block and continue with the next printing process.
The invention has the beneficial effects that:
1. The novel printing head for printing the continuous fiber thermoplastic prepreg filaments is designed, a laser in-situ preheating module and an in-situ compression roller compacting module are added, the functions of prepreg filament cutting, filament stopping, re-feeding and the like in the printing process are integrated, and high-quality and high-efficiency forming of the continuous fiber composite material can be realized.
2. Under the combined action of the laser preheating module and the compression roller module of the novel printing head, the interlayer bonding strength of the 3D printing continuous fiber composite material can be effectively improved.
3. The short-range yarn breaking function is adopted, and the printed yarn bundle is in a tension-free state after the yarn bundle is cut off, so that the yarn bundle can be partially deflected due to the tension-free state when the printing of the residual yarn bundle is continued, the quality forming quality is poor, and the length of the residual yarn bundle is shorter when the yarn bundle is cut off in a short range, thereby being beneficial to reducing the generation of the fiber partial deflection phenomenon when the residual yarn bundle is continuously printed.
4. The fiber cutting method has the advantages that the fiber cutting is carried out by adopting the mode that the flat-mouth blade and the chopping board are matched to chop the fiber, compared with the method of cutting the prepreg fiber, the incision is smoother, and the phenomenon that the fiber is difficult to completely cut when the fiber is cut during high-speed printing is avoided.
5. The infrared depth camera is used for monitoring the laser irradiation landing in real time, and outputting a signal to control the adjustment of the laser irradiation landing, so that the accurate control of the laser irradiation landing in the printing process can be realized, the printing energy consumption is reduced, and the performance of a workpiece is improved.
Drawings
FIG. 1 is a three-dimensional view of a multi-functional 3D printhead with laser pre-heating and in situ compaction;
FIG. 2 is a rear view of a multi-functional 3D printhead with laser pre-heating and in situ compaction;
FIG. 3 is a three-dimensional view of a pneumatic wire cutting structure;
Fig. 4 is a three-dimensional view of the cutter.
In the figure: the device comprises a piston block 1, a printing head mounting plate 2, a mounting seat on a wire feeding mechanism 3, a steering engine 4, a metal swing arm 5, a laser mounting bracket 6, a laser 7, a mounting seat under the wire feeding mechanism 8, a driving wire feeding wheel 9, a anvil block 10, a printing nozzle 11, a metal compacting roller 12, a blade mounting seat 13, a wire cutting mechanism mounting bracket 14, a thumb cylinder 15, a Teflon tube 16, a driven wire feeding wheel 17, a pneumatic sliding block 18, an infrared depth camera 19, a piston block support 20, a stepping motor 21 and a cutter 22.
Detailed Description
The present invention is further illustrated in the following drawings and detailed description, which are to be understood as being merely illustrative of the invention and not limiting the scope of the invention. It should be noted that the words "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to directions in the drawings, and the words "inner" and "outer" refer to directions toward or away from, respectively, the geometric center of a particular component.
As shown in fig. 1 to 3, a 3D printhead with laser preheating and in-situ compacting in this embodiment includes a printhead mounting plate 2, on the upper left of which a pneumatic slider 18 is mounted to control the up and down movement of the entire printhead after ventilation, and adjusts the pressure applied during printing formation by controlling the air pressure.
The right of the pneumatic sliding block 18 is provided with an upper wire feeding mechanism mounting seat 3 and a lower wire feeding mechanism mounting seat 8, a driving wire feeding wheel 9 and a driven wire feeding wheel 17 are arranged between the upper wire feeding mechanism mounting seat 3 and the lower wire feeding mechanism mounting seat 8, wherein the driving wire feeding wheel 9 is arranged on a rotating shaft of a stepping motor 21, the stepping motor controls the driving wire feeding wheel 9 to rotate, and the driving wire feeding wheel 9 and the driven wire feeding wheel 17 are attached to drive wires to be further conveyed forwards. A teflon tube 16 is arranged between the upper part of the anvil block 10 and the lower mounting seat 8 of the wire feeding mechanism to serve as a wire feeding channel.
A laser mounting bracket 6 is mounted on the right side of the printing head mounting plate 2, a laser 7 is mounted on the laser mounting bracket 6, and laser emitted by the laser 7 directly irradiates the prepreg filaments output by the printing nozzle 11, so that the prepreg filaments are heated and melted. Below the printing nozzles, a metal compacting roller 12 is installed, which can compact and print the prepreg filaments fed from the inside of the printing nozzles 11.
The mounting seat 3 on the wire feeding mechanism is connected with the metal swing arm 5, the metal swing arm 5 is mounted on the rotating shaft of the steering engine 4, the steering engine 4 controls the metal swing arm 5 to rotate, when the metal swing arm 5 rotates clockwise, the mounting seat 3 on the wire feeding mechanism is driven to rotate anticlockwise around the upper left mounting hole of the mounting seat, the driving wire feeding wheel 9 and the driven wire feeding wheel 17 are tightly attached at the moment, the wire feeding action can be completed by matching with the stepping motor 21, when the metal swing arm 5 rotates anticlockwise, the mounting seat 3 on the wire feeding mechanism is driven to rotate clockwise around the upper left mounting hole of the mounting seat, at the moment, the driving wire feeding wheel 9 is separated from the driven wire feeding wheel 17, and at the moment, the prepreg wire is in a free state.
A pneumatic wire cutting structure is arranged below the pneumatic sliding block 18, so that a presoaked wire cutting function in the printing process can be realized, and the wire cutting mechanism is connected with the printing head mounting plate 2 through a wire cutting mechanism mounting bracket 14. A thumb cylinder 15 is arranged at the upper left of the wire cutting mechanism mounting bracket 14, the pneumatic telescopic end of the thumb cylinder 15 is connected with a blade mounting seat 13, the other end of the blade mounting seat 13 is provided with a cutter 22, and the edge side of the cutter 22 can extend into a groove on the anvil block 10.
When the thumb cylinder 15 controls the blade mounting seat 13 to retract to the left and the upper side, the cutter 22 is separated from the inner wall of the groove of the chopping block 10, and at the moment, the prepreg filaments can pass through the filament bundle conveying channel in the chopping block 10 and pass through the printing nozzle 11, and when the thumb cylinder 15 controls the blade mounting seat 13 to extend to the right and the lower side, the cutter 22 approaches to the inner wall of the groove of the chopping block 10 at a high speed, and the prepreg filaments are cut off to finish the filament cutting action.
Further, in order to realize adjustment of the laser irradiation landing point, the mounting hole at the joint of the print head mounting plate 2 and the laser mounting bracket 6 is arc-shaped, and the laser can be controlled to rotate by adjusting the mounting position on the arc-shaped hole, so that the change of the laser irradiation landing point is realized.
Install infrared depth camera 19 on the print head mounting panel 2, can real-time supervision print process laser landing position, and install piston block support 20 above the print head mounting panel 2, install the piston block 1 of steerable flexible length between piston block support 20 and laser mounting bracket 6, can adopt infrared depth camera 19 to monitor laser landing in the print process to thereby through the flexible real-time control laser mounting bracket 6 rotation of piston block 1 adjustment laser landing position, realize the accurate heating of print process.
Further, in order to realize 3D printing of the continuous fiber composite material with high interlayer bonding performance, the prepreg filaments are mutually matched with the driven wire feeding wheel 17 through the driving wire feeding wheel 9, the prepreg filaments are conveyed into the teflon tube 16, then the prepreg filaments continue to pass through the teflon tube 16, enter a filament bundle conveying channel in the anvil block 10, are output from the nozzle 11 and reach the position right below the metal compacting roller 12, and the printing of the product starts. When the workpiece is printed, the laser 7 is started, the laser beam directly irradiates the prepreg filaments in the printing, meanwhile, the preheating compaction of the 3D printing continuous fiber composite material is finished under the compaction action of the metal compaction roller 12, and the interlayer bonding strength is improved.
The infrared depth camera 19 in the printing process monitors the laser landing position in real time, when the laser irradiation point deviates in the printing process, the infrared depth camera 19 outputs a control signal to control the telescopic real-time control of the piston block 1 to rotate the laser mounting bracket 6 so as to adjust the laser landing position, and the accurate heating in the printing process is realized.
After the printing of the workpiece is finished, the thumb cylinder 15 drives the cutter 22 to cut off the prepreg filaments, the cutter 22 is a straight cutter edge, and the cutter edge is impacted against the groove wall on the chopping block 10 at a high speed under the control of the cylinder, so that the cutting of the prepreg filaments is finished.
After the prepreg filaments are cut, the thumb cylinder 15 controls the cutter 22 to retract, at which point the prepreg filaments may continue through the tow passage in the anvil block 10 for subsequent printing processes.
The distance between the position of the cutter and the compacting position of the compacting roller is smaller, so that the short-range broken yarn is realized, and the phenomenon that the fiber deflects due to the tension-free state of the printing yarn bundle after the yarn bundle is cut is reduced.
In the embodiment, the multifunctional printing head can realize the printing forming of the prepreg wires with the diameter of 0.4mm-1.2mm, and the printing forming is realized by replacing printing nozzles with different inner diameters.
In the embodiment, the pre-impregnated wire is preheated in real time in the printing process in a laser heating mode, compared with a traditional heating block, the thermal efficiency is higher, the forming of PPS, PEEK, PEKK and other high-temperature resin-based composite wires can be realized, and the forming of the composite material with high printing speed can be realized due to high laser energy density.
In this embodiment, the surface of the metal compaction roller 12 is coated with a high temperature low surface tension coating to prevent the entrainment of resin material on the deposited wire during the print compaction process, avoiding uneven resin formation in the final composite member.
In the embodiment, the cutter is a straight knife edge cutter, and can be matched with the inner wall of metal to realize the chopping of the prepreg filaments.
In the embodiment, the laser wavelength of the laser is 976nm, the core diameter of the optical fiber is 0.4nm, and the maximum power is 40W, so that the efficient heating and melting of the continuous fiber prepreg can be satisfied.
The technical means disclosed by the scheme of the invention is not limited to the technical means disclosed by the embodiment, and also comprises the technical scheme formed by any combination of the technical features.
Claims (7)
1. A 3D printhead with laser pre-heating and in situ compaction, comprising a printhead mounting plate (2); the method is characterized in that: a pneumatic sliding block (18) is arranged at the upper left side of the printing head mounting plate (2); an upper wire feeding mechanism mounting seat (3) and a lower wire feeding mechanism mounting seat (8) are respectively arranged on the printing head mounting plate (2); a driving wire feeding wheel (9) and a driven wire feeding wheel (17) are arranged between an upper wire feeding mechanism mounting seat (3) and a lower wire feeding mechanism mounting seat (8), a laser mounting bracket (6) is arranged on the right side of a printing head mounting plate (2), a laser (7) is arranged on the laser mounting bracket (6), and the lower wire feeding mechanism mounting seat (8) is connected with an anvil block (10) through a pre-soaking wire to Teflon tube (16); wherein the nozzle (11) is mounted on the anvil block (10); a pneumatic wire cutting structure is arranged below the pneumatic sliding block (18), and the wire cutting mechanism is connected with the printing head mounting plate (2) through a wire cutting mechanism mounting bracket (14); the wire feeding mechanism is characterized in that the mounting seat (3) on the wire feeding mechanism is connected with the metal swing arm (5), the metal swing arm (5) is mounted on the rotating shaft of the steering engine (4), the steering engine (4) controls the metal swing arm (5) to rotate, when the metal swing arm (5) rotates clockwise, the mounting seat (3) on the wire feeding mechanism is driven to rotate anticlockwise around the upper left mounting hole of the mounting seat, the driving wire feeding wheel (9) is tightly attached to the driven wire feeding wheel (17), the wire feeding action can be completed by matching with the stepping motor (21), when the metal swing arm (5) rotates anticlockwise, the mounting seat (3) on the wire feeding mechanism is driven to rotate clockwise around the upper left mounting hole of the mounting seat, the driving wire feeding wheel (9) is separated from the driven wire feeding wheel (17), and the prepreg wire is in a free state; a thumb cylinder (15) is arranged at the upper left part of the wire cutting mechanism mounting bracket (14), the pneumatic telescopic end of the thumb cylinder (15) is connected with a blade mounting seat (13), the other end of the blade mounting seat (13) is provided with a cutter (22), and the edge side of the cutter (22) can extend into a groove on the anvil block (10).
2. A 3D printhead with laser pre-heating and in situ compaction according to claim 1, wherein: wherein the driving wire feeding wheel (9) is arranged on the rotating shaft of the stepping motor (21).
3. A 3D printhead with laser pre-heating and in situ compaction according to claim 1, wherein: a metal compacting roller (12) is arranged below the printing nozzle (11), and the metal compacting roller (12) is arranged on a wire cutting mechanism mounting bracket (14).
4. A 3D printhead with laser pre-heating and in situ compaction according to claim 1, wherein: the mounting hole at the joint of the printing head mounting plate (2) and the laser mounting bracket (6) is arc-shaped.
5. A 3D printhead with laser pre-heating and in situ compaction according to claim 1, wherein: the knife edge of the cutter (22) is a straight knife edge.
6. A 3D printhead with laser pre-heating and in situ compaction according to claim 1, wherein: install infrared depth camera (19) on printing head mounting panel (2), can real-time supervision print process laser landing position, and print head mounting panel (2) top and install piston piece support (20), install piston piece (1) of steerable flexible length between piston piece support (20) and laser instrument installing support (6), can adopt infrared depth camera (19) to monitor laser landing in the printing process, thereby rotate adjustment laser landing position through flexible real-time control laser instrument installing support (6) of piston piece (1).
7. A method of operating a 3D printhead having laser preheating and in situ compaction according to any of claims 1 to 6, wherein: the method comprises the following steps:
step 1: the presoaked wire is mutually matched with a driving wire feeding wheel and a driven wire feeding wheel, the presoaked wire is conveyed into the Teflon tube, then continuously passes through the Teflon tube, enters a wire bundle conveying channel in an anvil block, is output from a nozzle and reaches the position right below a metal compacting roller, and the printing of a finished piece is started;
Step 2: when a workpiece is printed, a laser is started, laser beams directly irradiate prepreg filaments in the printing, meanwhile, preheating compaction of the 3D printing continuous fiber composite material is finished under the compaction action of a metal compaction roller, and interlayer bonding strength is improved, wherein compaction pressure is applied by adjusting air pressure in a pneumatic sliding block;
Step 3: the infrared depth camera monitors the laser drop point position in the printing process in real time, and when the laser irradiation point deviates in the printing process, the infrared depth camera outputs a control signal to control the expansion and contraction of the piston block (1) to control the laser mounting bracket to rotate in real time so as to adjust the laser drop point position, thereby realizing the accurate heating in the printing process;
Step 4: after the printing of the workpiece is finished, the thumb cylinder drives the cutter to cut off the prepreg filaments, the cutter edge is a straight edge, and under the control of the cylinder, the edge is impacted to the groove wall on the anvil block at a high speed, so that the cutting of the prepreg filaments is finished;
Step 5: after further pre-preg is cut, the thumb cylinder controls the cutter to retract, and at this time, the pre-preg can continue to pass through the tow channel in the anvil block and continue with the next printing process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310571466.6A CN116811238B (en) | 2023-05-20 | 2023-05-20 | 3D printing head with laser preheating and in-situ compaction and operation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310571466.6A CN116811238B (en) | 2023-05-20 | 2023-05-20 | 3D printing head with laser preheating and in-situ compaction and operation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116811238A CN116811238A (en) | 2023-09-29 |
| CN116811238B true CN116811238B (en) | 2024-06-28 |
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| CN114953438A (en) * | 2022-05-13 | 2022-08-30 | 南京航空航天大学 | Nozzle-changeable printing head for continuous fiber printing and printing method |
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| CN115972572A (en) * | 2023-01-06 | 2023-04-18 | 华中科技大学 | Robot-assisted laser additive manufacturing system for interlayer reinforcement of continuous fiber composite material |
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| JP2012193485A (en) * | 2011-03-18 | 2012-10-11 | Teijin Fibers Ltd | High strength spun machine sewing thread and method for producing the same |
| CN203004330U (en) * | 2012-12-13 | 2013-06-19 | 余金文 | Fiber implanting device |
| EP4008521B1 (en) * | 2013-03-22 | 2024-01-03 | Markforged, Inc. | Three dimensional printing of reinforced filament |
| US9126367B1 (en) * | 2013-03-22 | 2015-09-08 | Markforged, Inc. | Three dimensional printer for fiber reinforced composite filament fabrication |
| CN105415684B (en) * | 2015-12-18 | 2017-05-17 | 济南大学 | Delta 3d printer |
| CN110920054B (en) * | 2019-11-29 | 2024-05-10 | 浙江理工大学 | Automatic trade 3D printer of silk |
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| CN115042438B (en) * | 2022-06-17 | 2023-03-21 | 南京航空航天大学 | Printing head structure for continuous fiber prepreg wire |
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| CN114953438A (en) * | 2022-05-13 | 2022-08-30 | 南京航空航天大学 | Nozzle-changeable printing head for continuous fiber printing and printing method |
| CN114986889A (en) * | 2022-05-19 | 2022-09-02 | 深圳云疆智造科技有限公司 | 3D prints integrated shower nozzle and 3D printing apparatus |
| CN115972572A (en) * | 2023-01-06 | 2023-04-18 | 华中科技大学 | Robot-assisted laser additive manufacturing system for interlayer reinforcement of continuous fiber composite material |
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