CN112810141B - Execution head device for additive manufacturing of continuous resin fibers - Google Patents
Execution head device for additive manufacturing of continuous resin fibers Download PDFInfo
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- CN112810141B CN112810141B CN202011607159.1A CN202011607159A CN112810141B CN 112810141 B CN112810141 B CN 112810141B CN 202011607159 A CN202011607159 A CN 202011607159A CN 112810141 B CN112810141 B CN 112810141B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
- B29C64/30—Auxiliary operations or equipment
- B29C64/307—Handling of material to be used in additive manufacturing
- B29C64/314—Preparation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B33—ADDITIVE MANUFACTURING TECHNOLOGY
- B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
- B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
- B33Y40/10—Pre-treatment
Abstract
The invention discloses an execution head device for continuous resin fiber additive manufacturing, which comprises a main board, wherein the main board is sequentially provided with a dipping device, a traction device, a yarn outlet vibration shaping device and a fiber bundle cutting device; the continuous fibers enter the impregnation device to form a resin fiber bundle, the resin fiber bundle is fed into the yarn outlet vibration shaping device after being printed to a set width through mutual matching of the yarn spreading device and the traction device, a yarn outlet head of the yarn outlet vibration shaping device outputs the resin fiber bundle to a printing working surface, the yarn outlet head props against the resin fiber bundle and generates elastic extrusion and vibration extrusion between layers, and photocuring is carried out on the printed part through the light source device; and after printing is finished, positioning and cutting the resin fiber bundle through the fiber bundle cutting device. The invention improves the overall mechanical property and the processing precision of the additive manufacturing of the continuous resin fiber.
Description
Technical Field
The invention relates to the technical field of composite material additive manufacturing, in particular to an execution head device for continuous resin fiber additive manufacturing.
Background
Additive manufacturing (commonly known as 3D printing) is a technique of adding material layer by an additive manufacturing apparatus according to a pre-designed stereoscopic model to manufacture a three-dimensional object. The continuous resin fiber additive manufacturing can fully exert the advantages of no need of a mold in additive manufacturing, integral forming and light weight and high strength of fiber materials, improves the defects of strong dependence on the mold and limited model complexity of the traditional fiber laying or winding forming mode, and has wide prospects in the fields of aerospace, automobile industry, part manufacturing and the like.
At present, the thermoplastic resin additive manufacturing technology is mainly based on pure resin or thermoplastic resin added with reinforced particles. The material has high toughness, low modulus and low strength, can not meet the requirements of workpieces in the field of aerospace, and in order to improve the mechanical bearing of the material, domestic and foreign research institutions develop workpieces for melt printing continuous fibers. However, in the process of processing by adopting the product, the high-viscosity resin is difficult to completely permeate the dry fiber, so that the internal quality and the appearance quality of the product are influenced; meanwhile, the resin which is partially easy to oxidize and degrade is not suitable for the method of printing by the fusion method.
The existing off-line gumming (namely, the used raw material fiber is a gummed fiber wire) printing mode is also a mode of adopting dry fiber as a raw material and printing while gumming, and the method has defects in the aspects of controlling the resin content of continuous resin fiber and controlling the yarn spreading width of the continuous resin fiber.
Meanwhile, the problems of insufficient interlayer bonding strength, poor surface smoothness, inaccurate control of a shearing position and a photocuring angle and the like of a product manufactured by the conventional resin fiber additive are not solved, and the failure damage of breaking, debonding and the like of continuous fibers during the conventional equidistant printing is the universal defect of the product manufactured by the additive.
The specification with the publication number of CN108297404B discloses that the invention provides a continuous fiber 3D printing device and a method, comprising a fiber roller, a glue dipping part and a printing part, wherein the glue dipping part is provided with a shell filled with resin solution, a tensioning roller, a glue dipping split roller and a traction roller are sequentially arranged in the shell, the tensioning roller is arranged above the liquid level of the resin solution and used for providing partial pre-tightening force for dry fibers under the action of friction force, the glue dipping split roller is arranged below the liquid level of the resin and forms an included angle with the tensioning roller, and the traction roller is arranged above the liquid level of the resin and used for providing traction force; the dry fiber enters the dipping part through the fiber roller, is sequentially dipped by the tensioning roller, the dipping split roller and the traction roller, and is printed by the printing part. The invention is mainly explained for a gum dipping part, and the problems of yarn spreading, compaction, cutting, photocuring and the like are not mentioned.
The specification with the publication number of CN109094055B discloses a combined type multichannel continuous dry fiber 3D printing composite material forming device, which comprises a dry fiber storage rack, a dry fiber laying head, a guiding device, a setting agent coating device, a compacting device, a dry fiber preform laying mold and a laying movement mechanism; the dry fiber storage rack is arranged on the laying movement mechanism, and the laying movement mechanism can drive the dry fiber storage rack to move along the X-axis, Y-axis or Z-axis direction; a dry fiber laying head is arranged below the dry fiber storage rack, and a dry fiber preform laying mold is arranged below the dry fiber laying head; a guiding device is arranged between the dry fiber storage rack and the dry fiber laying head; the outlet of the dry fiber laying head is provided with a compaction device, and the side surface of the dry fiber laying head is provided with a setting agent coating device. The invention mainly solves the problems that the prepreg tows narrow band can not be bent in the plane any more and the wrinkles of the prepreg tows narrow band in the laying process are reduced, but the spray sizing agent in the invention can have side effects on the resin fiber forming.
The specification with the publication number of CN109016493B discloses a pressure-regulated FDM 3D printing method for continuous fiber composites, belongs to the field of fused deposition 3D printing of composites, and relates to a FDM 3D printing method for continuous fiber composites by regulating printing extrusion force. The method adopts a pressure-regulated FDM 3D printing system, and the printing system consists of a continuous fiber 3D printer, a pressure sensor, an information acquisition module, a Z-axis driving module and a computer control system. Firstly, importing the setting parameters of a three-dimensional model of a printing workpiece into a computer, acquiring real-time pressure control, and setting the fluctuation range of printing extrusion force; and respectively executing bottom layer, middle layer and top layer printing. The continuous fiber composite material FDM 3D printing method realizes continuous fiber composite material FDM 3D printing by regulating and controlling printing extrusion force, and is limited in pressure regulation range and free of trimming protection function.
Disclosure of Invention
The invention aims to provide an execution head device for continuous resin fiber additive manufacturing, which improves the overall mechanical property and the processing precision of the continuous fiber resin matrix composite material additive manufacturing by accurately controlling the content of resin fibers and improving the compactness among component layers.
The utility model provides a first device of execution of continuous resin fiber vibration material disk, includes the mainboard, the mainboard on be equipped with saturating device, draw gear, play yarn mouth vibrations shaping device and tow cutting device in proper order, draw gear is equipped with exhibition yarn device each other, the both sides that play yarn mouth vibrations shaping device are equipped with light source device.
The continuous fibers enter the impregnation device to form resin fiber bundles, the resin fiber bundles are fed into the yarn outlet vibration shaping device after being printed to a set width through the mutual matching of the yarn spreading device and the traction device, the yarn outlet head of the yarn outlet vibration shaping device outputs the resin fiber bundles to a printing working surface, the yarn outlet head props against the resin fiber bundles and generates elastic extrusion and vibration extrusion between layers, and the printed parts are subjected to photocuring through the light source device; and after printing is finished, positioning and cutting the resin fiber bundle by the fiber bundle cutting device.
The dipping device comprises an upper yarn roll component, a yarn passing hole plate, a positioning transition concave wheel and a dipping box. And the continuous fiber is wound on the upper yarn roll component, enters the positioning transition concave wheel through the yarn passing hole plate, and is transferred to the impregnation box by the positioning transition concave wheel. The continuous fibers are impregnated to form resin fiber bundles, the resin fiber bundles are output from the impregnation box, and the orientation and the position of the continuous fibers are controlled by the cooperation of the yarn passing hole plate and the positioning transition concave wheel.
The yarn spreading device comprises a positioning roller set provided with a sealing roller and a limiting concave wheel, a yarn spreading wheel set provided with a fixed roller and a force application roller, and a yarn guide ring set arranged on the yarn outlet vibration shaping device. The positioning roller set is arranged above the yarn spreading wheel set, the force applying roller is connected with the main board through a waist hole, the yarn spreading tension and the yarn spreading width of the resin fiber bundle are adjusted by adjusting the position of the force applying roller, and the yarn guide ring set comprises a plurality of coaxial yarn guide rings. And the resin fiber bundle is positioned between the closed roller and the limiting concave wheel and then enters the yarn unfolding wheel set for yarn unfolding.
The traction device comprises a first traction roller assembly arranged above the yarn unfolding device and a second traction roller assembly arranged below the yarn unfolding device. The first traction roller assembly comprises a first traction roller and a first drive connected with the first traction roller through a main plate; the second pull roll assembly includes a second pull roll, a second pull assist roll, and a second drive coupled to the second pull roll via the main plate.
The first traction roller assembly or/and the second traction roller assembly are/is selected to work according to different working conditions by the traction device, and the first traction roller or the second traction roller or both are selectively started due to the fact that the friction force generated in the traction device is different due to the fact that the viscosity of resin fiber bundles made of different materials is different.
Preferably, the second traction auxiliary roller is connected with a first stress application rod, the other end of the first stress application rod is fixed with the second stress application rod end to end through a connecting shaft penetrating through the main board, the other end of the second stress application rod is fixed with a traction auxiliary roller drive, and when the traction auxiliary roller drive works, the first stress application rod and the second stress application rod act on the second traction auxiliary roller, so that pressure is generated between the second traction auxiliary roller and the second traction roller, the resin fiber bundle is extruded, the friction force is increased, and the output of the resin fiber bundle is ensured; meanwhile, the position of the second traction auxiliary roller on the main board can be adjusted, and the auxiliary roller is suitable for conveying resin fiber bundles made of different materials.
The yarn outlet vibration shaping device comprises a connecting rod, an elastic mechanism, a yarn outlet vibration mechanism provided with a vibration yarn outlet base and a vibration element, and a yarn outlet head fixed at the lower end of the yarn outlet vibration mechanism. The upper end of the connecting rod is connected with the main board, the lower end of the connecting rod is fixed with the elastic mechanism, the elastic mechanism is movably connected with the yarn outlet vibrating mechanism, and the vibrating elements are symmetrically arranged on the left side and the right side of the vibrating yarn outlet base and provide vibrating power for the yarn outlet vibrating mechanism; the yarn outlet vibration shaping device is used for outputting the resin fiber bundles to a working surface and generating elastic pressure and vibration action between layers of a workpiece.
The elastic mechanism comprises a limiting base, an elastic element and an end cover fixed on the lower part of the vibrating yarn outlet base. The side of the limiting base is provided with a guide hole plate parallel to the yarn guide ring group, the elastic element is arranged between the limiting base and the end cover, the limiting base and the vibration yarn outlet base are matched with the waist hole through a limiting part, and the limiting base vertically reciprocates along the waist hole. The lower end of the yarn outlet head is provided with a trimming boss, the trimming boss ensures the width of the fiber yarn, the consistency of the side edges and the smoothness of the side wall, and the arrangement of the oblique angle improves the precision and the smoothness of a printing surface.
The yarn guide ring group is fixed along the axial direction of the connecting rod, the yarn guide rings are horizontally fixed on the side faces of the connecting rod, and the diameters of the adjacent yarn guide rings are different. The resin fiber bundle passes through the yarn guide rings with different diameters, and the tension is generated by using different diameters to generate a yarn spreading effect; meanwhile, the resin fiber bundle enters the yarn outlet head through the yarn guide ring, so that the resin fiber bundle is prevented from deviating.
The light source device comprises a first connecting rod movably connected with the mainboard, a multi-connecting-rod mechanism connected with the first connecting rod, a light source connected with the light source seat at the other end of the multi-connecting-rod mechanism and a light source fixed inside the light source seat, the multi-connecting-rod mechanism is fixedly connected in a detachable mode, and joints of the connecting rods are fixed after adjustment. The multi-connecting-rod mechanism is adopted to ensure that the relative positions of the light source and the yarn outlet head are reasonable, so that the photocuring effect reaches the best.
The fiber bundle cutting device comprises a station adjusting assembly, a scissors opening and closing assembly and scissors, wherein the station adjusting assembly comprises a base support, a vertical drive, a first support, an oblique drive and a second support; the vertical drive is fixed at the lower part of the main board through the base support, the first support is driven to vertically move, the drive shaft driven obliquely downwards inclines for 1-45 degrees and is fixed on the first support, and the second support is driven to be close to the resin fiber bundle or far away from the resin fiber bundle; the scissors opening and closing assembly comprises a linking plate connected with the second support, a shearing drive fixed on the linking plate and a connecting rod sliding block mechanism for driving the scissors to move, a connecting rod of the connecting rod sliding block mechanism is connected with the shearing drive, and a sliding block abuts against the outer edge of the scissors; the scissors are fixed with the linking plate.
The linkage plate is provided with a guide rail with an oblique angle of 10-45 degrees to be matched with the sliding block, and the lower end of the sliding block is provided with a groove which performs downward pressing motion along the outer edge of the scissors; when the shearing drive is operated, the connecting rod drives the sliding block to press the scissors downwards along the guide rail of the link plate, so that the shearing action of the scissors is realized.
The traction auxiliary roller drive, the vertical drive and the shearing drive are all pneumatic executive elements, and the main board is provided with an air source processing element matched with the pneumatic executive elements and an air source control element group connected with the air source processing element and used for controlling each pneumatic executive element.
Compared with the prior art, the execution head device for additive manufacturing of continuous resin fibers has the advantages that:
1. the invention realizes the adjustable fiber traction resistance by a double-group traction mode, and effectively ensures the consistency of the fiber tension in the printing process.
2. The on-line preparation of the resin fiber reduces the technical difficulty and cost, reduces the influence on the subsequent printing precision due to unreasonable cutting position of the fiber head, and simultaneously ensures continuous automatic operation.
3. The compactness between layers is enhanced through the elastic pressure and vibration effect between the printing layers, and the performance between the layers is effectively improved through the fiber reinforcement of the bonding interface between the product layers, so that the overall mechanical performance improvement and the precision improvement of the additive manufacturing of the continuous fiber resin matrix composite material are realized, and the high-quality and high-efficiency manufacturing of the continuous resin fiber reinforced composite material is realized.
Drawings
FIG. 1 is a schematic structural diagram of a continuous resin fiber additive manufacturing execution head device according to an embodiment of the present invention;
FIG. 2 is a schematic rear view of the continuous resin fiber additive manufacturing execution head device shown in FIG. 1;
FIG. 3 is a schematic plan view of the yarn outlet vibration shaping device shown in FIG. 1;
FIG. 4 is a schematic cross-sectional view of the yarn outlet vibration shaping device shown in FIG. 3;
FIG. 5 is a schematic perspective view of the yarn outlet vibration shaping device shown in FIG. 3;
FIG. 6 is a schematic view of the light source device shown in FIG. 1;
fig. 7 is a schematic structural view of the fiber bundle cutting device shown in fig. 1.
Detailed Description
As shown in fig. 1 and 2, the execution head device for continuous resin fiber additive manufacturing comprises a main board 1, wherein the main board 1 is sequentially provided with a dipping device 2, a leading device group 4, a yarn mouth vibration shaping device 5 and a fiber bundle cutting device 7, yarn spreading devices 3 are arranged between the leading devices 4, and light source devices 6 are arranged on two sides of the yarn outlet vibration shaping device 5; the continuous fiber enters the impregnation device 2 to form a resin fiber bundle, the resin fiber bundle is formed into a printing set width through the mutual matching of the yarn spreading device 3 and the traction device 4 and then is sent into the yarn outlet vibration shaping device 5, the yarn outlet head 54 of the yarn outlet vibration shaping device 5 outputs the resin fiber bundle to a printing working surface, the yarn outlet head 54 supports against the resin fiber bundle and generates elastic extrusion and vibration extrusion between layers, and the printed part is subjected to photocuring through the light source device 6; after the printing is completed, the resin fiber bundle is positioned and cut by the fiber bundle cutting device 7.
The impregnation device 2 comprises an upper yarn roll component 21, a yarn passing hole plate 22, a positioning transition concave wheel 23 and an impregnation box 24; the continuous fibers are wound on the upper reel assembly 21 and pass through the screen plate 22 into the positioning transition concave wheel 23. the positioning transition concave wheel 23 delivers the continuous fibers to the impregnation box 24. The continuous fibers are impregnated to form a resin fiber bundle, the resin fiber bundle is output from an impregnation box 24, and the running direction and the position of the continuous fibers are controlled by the cooperation of the screen passing plate 22 and the positioning transition concave wheel 23.
The traction device 4 comprises a first traction roller assembly 41 arranged above the yarn spreading device 3 and a second traction roller assembly 42 arranged below the yarn spreading device 3; the first pulling roll assembly 41 includes a first pulling roll 411, a first drive 412 connected to the first pulling roll 411 through the main plate 1; the second pulling roll assembly 42 includes a second pulling roll 421, a second pulling auxiliary roll 422, and a second drive 423 connected to the second pulling roll 421 through the main plate 1.
Since the resin fiber bundles of different materials have different viscosities and frictional forces generated in the drawing device 4, the first drawing roll 411 or the second drawing roll 421 or both of them are selectively opened.
The second traction auxiliary roller 422 is connected with a first stress application rod 423, the other end of the first stress application rod 423 is fixed with a second stress application rod 424 end to end through a connecting shaft penetrating through the main board 1, the other end of the second stress application rod 424 is fixed with a traction auxiliary roller drive 425, when the traction auxiliary roller drive 425 works, the first stress application rod 423 and the second stress application rod 424 act on the second traction auxiliary roller 422, pressure is generated between the second traction auxiliary roller 422 and the second traction roller 421, the resin fiber bundle is extruded, friction is increased, and output of the resin fiber bundle is guaranteed; meanwhile, the position of the second traction auxiliary roller 422 on the main board 1 can be adjusted, so that the auxiliary roller is suitable for conveying resin fiber bundles made of different materials.
As shown in fig. 3 and 4, the yarn outlet vibration shaping device 5 comprises a connecting rod 51, an elastic mechanism 52, a yarn outlet vibration mechanism 53 provided with a vibration yarn outlet base 531 and a vibration element 532, and a yarn outlet head 54 fixed at the lower end of the yarn outlet vibration mechanism 53; the upper end of the connecting rod 51 is connected with the main board 1, the lower end of the connecting rod is fixed with the elastic mechanism 52, the elastic mechanism 52 is movably connected with the yarn outlet vibration mechanism 53, the vibration elements 532 are symmetrically arranged on the left side and the right side of the vibration yarn outlet base 531, and the yarn outlet vibration shaping device 5 is used for outputting resin fiber bundles to a working surface and generating elastic pressure and vibration action among layers of a workpiece.
The elastic mechanism 52 comprises a limit base 521, an elastic element 522 and an end cover 523; a guide pore plate 55 parallel to the yarn guide ring group 57 is fixed on the side surface of the limit base 521; the upper part of the limiting base 521 is fixed with the connecting rod 51, two side faces of the limiting base 521 are provided with first waist holes 524, the openings of which are vertical to the axial direction of the connecting rod 51, and the length direction of the first waist holes 524 is parallel to the axial direction of the connecting rod 51; the upper end and the lower end of the elastic element 522 are abutted between the limiting base 521 and the end cover 523, the limiting base 521 and the yarn outlet vibrating mechanism 53 are elastically fixed through a limiting shaft 56 fixed on the yarn outlet vibrating mechanism 53 and a first waist hole 524, and the limiting base 521 makes linear reciprocating motion along the first waist hole 524; the lower end of the yarn outlet head 54 is provided with a finishing boss 541, the finishing boss 541 ensures the width of the resin fiber bundle, the consistency of the side edges and the smoothness of the side walls, and the arrangement of the oblique angle improves the precision and the smoothness of a printing surface.
The yarn guide ring group 57 is fixed along the axial direction of the connecting rod 51, the yarn guide rings are horizontally fixed on the side surface of the connecting rod 51, and the diameters of the adjacent yarn guide rings are different; the resin fiber bundle passes through the yarn guide rings with different diameters, and the tension is generated by using different diameters to generate a yarn spreading effect; meanwhile, the resin fiber bundle enters the yarn outlet head 54 through the yarn guide ring, so that the resin fiber bundle is prevented from deviating.
As shown in fig. 5, the yarn outlet vibrating mechanism 53 includes a vibrating yarn outlet base 531 and a vibrating element 532, a rectangular through hole matched with the lower part of the limiting base 521 is formed in the middle of the vibrating yarn outlet base 531, and the lower part of the vibrating yarn outlet base is fixed to the end cover 523; the vibrating elements 532 are symmetrically arranged at the left side and the right side of the vibrating yarn outlet base 531, and provide vibrating power for the yarn outlet vibrating mechanism 53.
As shown in fig. 6, the light source device 6 includes a first link 61 movably connected to the main board 1, a multi-link mechanism 62 connected to the first link 61, a light source holder 63 connected to the other end of the multi-link mechanism 62, and a light source 64 fixed inside the light source holder 63, wherein the multi-link mechanism 62 is connected by bolts, and the bolts of the respective links are tightened after the position of the light source 64 is adjusted. The multi-link mechanism 62 is adopted to ensure that the relative positions of the light source 64 and the yarn outlet head 54 are reasonable, so that the light curing effect is optimal.
In this embodiment, the multi-link mechanism 62 is a three-link mechanism.
As shown in fig. 7, the fiber bundle cutting device 7 includes a station adjusting assembly 71, a scissors opening and closing assembly 72 and scissors 73, the station adjusting assembly 71 includes a base bracket 711, a vertical drive 712, a first bracket 713, an oblique drive 714 and a second bracket 715; the vertical driver 712 is fixed on the lower part of the main board 1 through the base bracket 711, drives the first bracket 713 to move vertically, and drives the driving shaft of the oblique driver 714 to incline downwards by 1-45 degrees and be fixed on the first bracket 713, and drives the second bracket 715 to be close to the resin fiber bundle or far away from the resin fiber bundle; the scissors opening and closing assembly 72 comprises a link plate 721 connected with the second support 715, a cutting drive 722 fixed on the link plate 721 and a link slider mechanism 723 driving the scissors 73 to move, a link 724 of the link slider mechanism 723 is connected with the cutting drive 722, and a slider 725 abuts against the outer edge of the scissors 73; scissors 73 are fixed to link plate 721.
The link plate 721 is provided with a guide rail with an oblique angle of 10-45 degrees to be matched with the sliding block 725, and the lower end of the sliding block 725 is provided with a groove which moves downwards along the outer edge of the scissors 73; when the cutting drive 722 operates, the slide 725 is driven by the link 724 to press down the scissors 73 along the guide rail of the link plate 721, so that the cutting action of the scissors 73 is realized.
The traction auxiliary roller drive 425, the vertical drive 712 and the shearing drive 722 are all pneumatic actuators, and the main board 1 is provided with an air source processing element 8 matched with the pneumatic actuators and an air source control element group 9 connected with the air source processing element 8 and used for controlling each pneumatic actuator.
Continuous fibers enter the positioning transition concave wheel 23 from the upper yarn roll assembly 21 through the yarn passing hole plate 22, the positioning transition concave wheel 23 delivers the resin fiber bundles to the inlet of the impregnation box 24, the resin fiber bundles are formed by the impregnation of the serous solution and enter the impregnation box 24, and the formed resin fiber bundles are output from the outlet of the impregnation box 24.
When the first driving device 412 is started to drive the first drawing roller 411 to rotate, the resin fiber bundle in operation bypasses the first drawing roller 411 in a tight state to generate friction force, and the resin fiber bundle is drawn out along with the first drawing roller 411 through the friction force.
The resin fiber bundle enters between the sealing roller 311 and the limiting concave wheel 312 through the first traction roller 411, and the position of the resin fiber bundle is controlled to prevent the resin fiber bundle from shifting; the resin fiber yarn bundle is output through the spreader bar assembly 32 to the second pull roll assembly 42.
The second drive 423 is activated to rotate the second drawing roller 421 so that the resin fiber bundle passes between the second drawing roller 421 and the second drawing auxiliary roller 422.
Then, the traction assist roller drive 425 is restarted to generate a pressure to act on the second traction assist roller 422 via the first force applying rod 423 and the second force applying rod 424, thereby generating a traction force by rotation and drawing the resin fiber bundle out.
Adjusting the yarn bundle of the fiber yarn to pass through a yarn guide ring and a guide pore plate 55 to reach the outlet of a yarn outlet head 54, pressing the resin fiber bundle on the yarn outlet head 54, transmitting the pressure to an elastic mechanism 52 through a yarn outlet vibration mechanism 53, and generating resilience force by the stress of an elastic element 522 in the elastic mechanism 52 so that the yarn outlet head 54 generates elastic extrusion on yarn layers; the yarn outlet vibrating mechanism 53 is started, and the vibrating element 532 fixed on the yarn outlet base 62 is started, so that the yarn outlet 54 and the elastic mechanism 52 vibrate together, the elastic mechanism 52 generates elastic force, and the elastic force and the vibration are matched to further vibrate and extrude the layers of the workpiece, and the interlayer combination is strengthened.
Adjusting the first link 61 and the three-link mechanism 62 of the light source device 6 to enable the light source 64 to be located at a proper position, then adjusting the light source seat 63 to enable the light source 64 to be located at a proper angle, finally fixing all connecting parts of the light source device 6, and starting a printing program to start a printing operation; in the printing operation, the resin fiber bundle at the outlet of the yarn outlet head 54 is photocured by the light source device 6 and fixed on the working surface to complete a working period cycle;
the air source processing element 8 is started, the vertical drive 712 is driven to work through the air source control element group 9, and the scissors 73 extend out to the required position along the vertical direction; the oblique drive 714 is driven to work through the air source control element group 9, and the scissors 73 are inserted into the cut resin fiber bundles obliquely without touching the printed piece; then, the shearing drive 722 is driven by the air source control element group 9, and the scissors 73 are driven to be closed by the connecting rod sliding block mechanism 723 so as to achieve the purpose of shearing; finally, the air source control element group 9 drives the vertical drive 712 and the oblique drive 714 to return to the original waiting working position, and the shearing work is completed.
Claims (7)
1. An execution head device for continuous resin fiber additive manufacturing comprises a main board (1) and is characterized in that a dipping device (2), a traction device (4), a yarn outlet vibration shaping device (5) and a fiber bundle cutting device (7) are sequentially arranged on the main board (1), yarn unfolding devices (3) are arranged among the traction devices (4), and light source devices (6) are arranged on two sides of the yarn outlet vibration shaping device (5); continuous fibers enter the impregnation device (2) to form a resin fiber bundle, the resin fiber bundle is formed into a printing set width through the mutual cooperation of the yarn spreading device (3) and the traction device (4) and then is sent to the yarn outlet vibration shaping device (5), a yarn outlet head (54) of the yarn outlet vibration shaping device (5) outputs the resin fiber bundle to a printing working surface, the yarn outlet head (54) supports against the resin fiber bundle and generates elastic extrusion and vibration extrusion between layers, and the printed part is subjected to photocuring through the light source device (6); after printing is finished, positioning and cutting the resin fiber bundle through the fiber bundle cutting device (7);
the yarn stretching device (4) comprises a first traction roller assembly (41) arranged above the yarn stretching device (3) and a second traction roller assembly (42) arranged below the yarn stretching device (3), the first traction roller assembly (41) comprises a first traction roller (411) and a first drive (412) connected with the first traction roller (411) through a main plate (1), and the second traction roller assembly (42) comprises a second traction roller (421), a second traction auxiliary roller (422) and a second drive connected with the second traction roller (421) through the main plate (1);
the second traction auxiliary roller (422) is connected with a first stress application rod (423), the other end of the first stress application rod (423) is fixed with a second stress application rod (424) end to end through a connecting shaft penetrating through the main board (1), and the other end of the second stress application rod (424) is fixed with a traction auxiliary roller drive (425);
the yarn outlet vibration shaping device (5) comprises a connecting rod (51), an elastic mechanism (52), a yarn outlet vibration mechanism (53) provided with a vibration yarn outlet base (531) and a vibration element (532), and a yarn outlet head (54) fixed at the lower end of the yarn outlet vibration mechanism (53), wherein the upper end of the connecting rod (51) is connected with the main board (1), the lower end of the connecting rod is fixed with the elastic mechanism (52), the elastic mechanism (52) is movably connected with the yarn outlet vibration mechanism (53), and the vibration elements (532) are symmetrically arranged at the left side and the right side of the vibration yarn outlet base (531);
the elastic mechanism (52) comprises a limiting base (521), an elastic element (522) and an end cover (523) fixed at the lower part of the vibration yarn outlet base (531), a guide hole plate (55) parallel to the yarn guide ring group (57) is arranged on the side surface of the limiting base (521), the elastic element (522) is arranged between the limiting base (521) and the end cover (523), the limiting base (521) and the vibration yarn outlet base (531) are matched with a waist hole through a limiting piece, and the limiting base (521) vertically reciprocates along the waist hole; and a finishing boss (541) is arranged at the lower end of the yarn outlet head (54).
2. The continuous resin fiber additive manufacturing execution head device according to claim 1, wherein the impregnation device (2) comprises an upper yarn roll assembly (21), a yarn passing hole plate (22), a positioning transition concave wheel (23) and an impregnation box (24), the continuous fiber is wound on the upper yarn roll assembly (21), the continuous fiber enters the positioning transition concave wheel (23) through the yarn passing hole plate (22), and the positioning transition concave wheel (23) transmits the continuous fiber to the impregnation box (24).
3. The continuous resin fiber additive manufacturing execution head device according to claim 1, wherein the yarn spreading device (3) comprises a positioning roller group (31) provided with a sealing roller (311) and a limiting concave wheel (312), a yarn spreading roller group (32) provided with a fixed roller (321) and a forcing roller (322), and a yarn guide ring group (57) arranged on the yarn outlet vibration shaping device (5), the positioning roller group (31) is arranged above the yarn spreading roller group (32), the forcing roller (322) is connected with the main plate (1) through a waist hole, and the yarn guide ring group (57) comprises a plurality of coaxial yarn guide rings.
4. The continuous resin fiber additive manufacturing actuator head device according to claim 1, wherein the light source device (6) comprises a first connecting rod (61) movably connected to the main board (1), a multi-connecting-rod mechanism (62) connected to the first connecting rod (61), a light source seat (63) connected to the other end of the multi-connecting-rod mechanism (62), and a light source (64) fixed inside the light source seat (63), the multi-connecting-rod mechanism (62) adopts a detachable fixed connection, and the connecting positions of the connecting rods are fixed after adjustment.
5. The continuous resin fiber additive manufacturing execution head device according to claim 1, wherein the fiber bundle cutting device (7) comprises a station adjusting assembly (71), a scissors opening and closing assembly (72) and scissors (73), the station adjusting assembly (71) comprises a base support (711), a vertical drive (712), a first support (713), an oblique drive (714) and a second support (715), the vertical drive (712) is fixed at the lower part of the main plate (1) through the base support (711), the first support (713) is driven to move vertically, a drive shaft of the oblique drive (714) inclines downwards by 1-45 degrees and is fixed at the first support (713), and the second support (715) is driven to be close to the resin fiber bundle or far away from the resin fiber bundle; the scissors opening and closing assembly (72) comprises a linking plate (721) connected with the second support (715), a shearing drive (722) fixed on the linking plate (721) and a connecting rod sliding block mechanism (723) for driving the scissors (73) to move, a connecting rod (724) of the connecting rod sliding block mechanism (723) is connected with the shearing drive (722), the sliding block (725) abuts against the outer edge of the scissors (73), and the scissors (73) are fixed with the linking plate (721).
6. The continuous resin fiber additive manufacturing execution head device according to claim 5, wherein the link plate (721) is provided with a guide rail with an oblique angle of 10-45 degrees to be matched with the sliding block (725), and the lower end of the sliding block (725) is provided with a groove which is pressed down along the outer edge of the scissors (73).
7. The continuous resin fiber additive manufacturing execution head device according to claim 1 or 5, wherein the traction auxiliary roller drive (425), the vertical drive (712) and the shearing drive (722) are all pneumatic execution elements, and an air source processing element (8) matched with the pneumatic execution elements and an air source control element group (9) connected with the air source processing element (8) and used for controlling each pneumatic execution element are arranged on the main board (1).
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| CN202011607159.1A CN112810141B (en) | 2020-12-30 | 2020-12-30 | Execution head device for additive manufacturing of continuous resin fibers |
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| CN202011607159.1A CN112810141B (en) | 2020-12-30 | 2020-12-30 | Execution head device for additive manufacturing of continuous resin fibers |
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| CN112810141B true CN112810141B (en) | 2022-08-30 |
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| CN105383060B (en) * | 2015-12-07 | 2017-10-17 | 济南鲁洋科技有限公司 | A kind of 3D printing feed, fluxing and crystallization in motion leveling integrated apparatus |
| CN108297404B (en) * | 2017-10-17 | 2020-08-04 | 航天特种材料及工艺技术研究所 | Continuous fiber 3D printing device and method |
| CN207449123U (en) * | 2017-10-26 | 2018-06-05 | 广州万思拓材料科技有限公司 | A kind of 3D printing extrusion device suitable for liquid material impregnating continuous fibres |
| CN108407300A (en) * | 2018-04-02 | 2018-08-17 | 西安交通大学 | Continuous fiber reinforced composites 3D printing silk material preparation method and device |
| CN212096545U (en) * | 2020-04-17 | 2020-12-08 | 深圳市晋粤港科技有限公司 | Industrial pneumatic scissors |
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