CN112659547B - Yarn discharging and curing device of additive manufacturing execution head - Google Patents
Yarn discharging and curing device of additive manufacturing execution head Download PDFInfo
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- CN112659547B CN112659547B CN202011608507.7A CN202011608507A CN112659547B CN 112659547 B CN112659547 B CN 112659547B CN 202011608507 A CN202011608507 A CN 202011608507A CN 112659547 B CN112659547 B CN 112659547B
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Abstract
The invention discloses a yarn discharging and solidifying device of an additive manufacturing execution head, which comprises a main board and a base arranged on the main board, wherein a yarn outlet vibration shaping device is fixed below the base and comprises a connecting rod, an elastic mechanism, a yarn outlet vibration mechanism and a yarn discharging head fixed at the lower end of the yarn outlet vibration mechanism; the upper end of the connecting rod is connected with the base, the lower end of the connecting rod is fixed with the elastic mechanism, and the elastic mechanism is movably connected with the yarn outlet vibrating mechanism; and light source devices for photocuring are arranged on two sides of the lower part of the main board. According to the invention, the fiber reinforcement of the bonding interface between the component layers is realized by the elastic pressure and vibration action between the printing layers and the compactness between the layers, so that the performance between the fiber layers can be effectively improved; the optimal photocuring angle and position of the photocuring device are adjusted to achieve the optimal curing effect, so that the overall mechanical property improvement and precision improvement of the additive manufacturing of the continuous fiber resin matrix composite material are realized.
Description
Technical Field
The invention relates to the technical field of additive manufacturing of composite materials, in particular to a yarn discharging and curing device of an additive manufacturing execution head.
Background
The additive manufacturing (commonly known as 3D printing) technology is a technology for manufacturing parts by using a layer-by-layer accumulation method for raw materials, and compared with the conventional composite material manufacturing technology, the additive manufacturing technology does not need a mold, a cutter, a clamp and other processing procedures. The additive manufacturing technology directly utilizes the characteristics of accurate and rapid manufacturing of any complex structure on equipment by using three-dimensional design data, shortens the manufacturing period and reduces the manufacturing cost.
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 soak dry fibers, 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 specification with the publication number of CN 207290937U discloses a 3D printer nozzle device with a simple detachable nozzle, which comprises a nozzle upper cover, a nozzle lower cover, a detachable nozzle component and a locking device component, wherein the detachable nozzle component is fixed on the nozzle lower cover through the locking device component, the detachable nozzle component comprises a stainless steel tube nozzle, a temperature control device, a nozzle shell and a nozzle main rod, the temperature control device surrounds the stainless steel tube nozzle, the bottom end of the stainless steel tube nozzle is clamped into the nozzle shell, the top end of the stainless steel tube nozzle is inserted into the nozzle main rod, a thread guide pipe and a gas pipe joint are arranged above the stainless steel tube nozzle, the locking device component comprises a torsion spring, a left hasp and a right hasp, and two ends of the torsion spring are connected with the left hasp and the right hasp respectively. The utility model discloses a can dismantle to the shower nozzle and design, can not improve the effect of printing.
The specification with the publication number of CN 109016493B discloses a pressure-regulated FDM 3D printing method for continuous fiber composite materials, belongs to the field of fused deposition 3D printing of composite materials, and relates to a FDM 3D printing method for continuous fiber composite materials by regulating and controlling 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 a yarn discharging and curing device of an additive manufacturing execution head, which improves the overall mechanical property and the processing precision of additive manufacturing of a continuous fiber resin matrix composite material.
A yarn discharging and solidifying device of an additive manufacturing execution head comprises a main board and a base arranged on the main board, wherein a yarn discharging port vibration shaping device is fixed below the base and comprises a connecting rod, an elastic mechanism, a yarn discharging port vibration mechanism and a yarn discharging head fixed to the lower end of the yarn discharging port vibration mechanism; the upper end of the connecting rod is connected with the base, the lower end of the connecting rod is fixed with the elastic mechanism, and the elastic mechanism is movably connected with the yarn outlet vibrating mechanism; and light source devices for photocuring are arranged on two sides of the lower part of the main board.
Adjusting the fiber yarn to a yarn outlet head of a yarn outlet vibration shaping device, outputting the fiber yarn to a printing working surface by the yarn outlet head and abutting against the fiber yarn, wherein the yarn outlet vibration mechanism is connected with an elastic mechanism, so that the yarn outlet head elastically extrudes yarn layers; starting a yarn outlet vibrating mechanism to further vibrate and extrude fiber yarn layers to strengthen interlayer combination, and starting a printing program to start printing operation; in the printing operation, the fiber yarn at the yarn outlet is photocured on the printed part by the light source device.
A plurality of coaxial yarn guide rings are fixed along the axial direction of the connecting rod, the yarn guide rings are horizontally fixed on the side face of the connecting rod, and yarn bundles of fiber yarns enter the yarn outlet head through the yarn guide rings, so that the yarn bundles are prevented from deviating.
The elastic mechanism comprises a limiting base, an elastic element and an end cover; the upper part of the limiting base is a cylinder, the lower part of the limiting base is a rectangular body, the cylinder at the upper part of the limiting base is fixed with the lower part of the connecting rod, two side surfaces of the rectangular body at the lower part are provided with first waist holes with orifices vertical to the axial direction of the connecting rod, and the length direction of the first waist holes is parallel to the axial direction of the connecting rod; the elastic element is arranged between the limiting base and the end cover, the lower part of the limiting base is elastically fixed with the first waist hole through a limiting shaft fixed on the yarn outlet vibrating mechanism, and the limiting base makes linear reciprocating motion along the first waist hole.
The side face of the limiting base is provided with a guide hole plate parallel to the yarn guide ring, the guide hole plate is a Z-shaped plate, the upper end face of the Z shape is provided with a guide hole, the lower end face of the Z shape is fixed on the limiting base, the guide hole is coaxial with the yarn guide ring, and a yarn bundle passes through the guide hole after passing through the yarn guide ring.
Preferably, the elastic element is a spring, a spring hole for placing the spring is formed in the lower portion of the limiting base, an end cover boss for sleeving the spring is arranged on the top surface of the end cover, the upper end of the spring abuts against the end face of the spring hole, the lower end of the spring is sleeved on the end cover boss, and the height of the spring hole is larger than or equal to the length of the first waist hole, wherein the length of the spring is larger than that of the spring hole after the spring is installed.
Preferably, the number of the limiting shafts is 2, and the limiting shafts are respectively sleeved at the first waist holes, so that the elastic mechanism can vibrate more stably during working.
The yarn outlet vibration mechanism comprises a vibration yarn outlet base and a vibration element, a rectangular through hole matched with the lower portion of the limiting base is formed in the middle of the vibration yarn outlet base, and the lower portion of the vibration yarn outlet base is fixed with the end cover.
The vibration elements are symmetrically arranged on the left side and the right side of the vibration yarn outlet base and provide vibration power for the yarn outlet vibration mechanism.
The vibration yarn outlet base is provided with a yarn outlet head at a position coaxial with the guide hole; the side of going out the yarn head is equipped with the locating surface of a plurality of directions of movement that are on a parallel with the yarn bundle, the locating surface is fixed through setting element and vibrations play yarn base, prevents to go out the yarn head because vibrations and take place to deflect in installation or work.
Preferably, the positioning piece is a puller bolt, and the puller bolt penetrates through the vibration yarn outlet base to be abutted and fixed with the positioning surface.
The lower end of the yarn outlet head is provided with a trimming boss, the inner side surface of the trimming boss is provided with an outer oblique angle of 0.5-10 degrees, the trimming boss ensures the width of the fiber yarn, 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.
Preferably, the yarn outlet heads comprise square yarn outlet heads, round yarn outlet heads and the like, different types of yarn outlet heads and corresponding guide hole plates are replaced according to requirements, and the use requirements of different fiber yarns and printing shapes are met.
The light source device comprises a first connecting rod movably connected to the main board, a multi-connecting-rod mechanism connected with the first connecting rod, a light source seat connected to 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 mainboard is provided with a second waist hole in the horizontal direction, the first connecting rod penetrates through the second waist hole, moves along the second waist hole to be adjusted, and is fixed with the mainboard through a fixing piece after being adjusted to a proper position.
Preferably, the multi-link mechanism is a three-link mechanism, and the three-link mechanism is connected end to ensure the adjustment distance of the light source in the horizontal and vertical directions.
Preferably, the number of the light source devices is 2, the light source devices are symmetrically distributed on two sides of the yarn outlet vibration shaping device, and the two sets of light source devices which are symmetrically distributed can eliminate dead angles in photocuring, so that the photocuring efficiency is improved.
The invention designs a yarn discharging and curing device of an additive manufacturing execution head, and compared with the prior art, the device has the advantages that:
1. the fiber reinforcement of the bonding interface between the component layers is realized by the elastic pressure and vibration action between the printing layers and the compactness between the layers, and the performance between the fiber layers can be effectively improved.
2. The optimal photocuring angle and position of the photocuring device are adjusted to achieve the optimal curing effect, so that the overall mechanical property improvement and precision improvement of the additive manufacturing of the continuous fiber resin matrix composite material are realized.
Drawings
FIG. 1 is a schematic structural diagram of a yarn discharging and solidifying device of an additive manufacturing execution head according to an embodiment of the invention;
FIG. 2 is a schematic structural view of the yarn outlet vibration shaping 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 isbase:Sub>A schematic sectional view A-A of the yarn outlet vibration shaping device shown in FIG. 3;
fig. 5 is a schematic structural diagram of the light source device shown in fig. 1.
Detailed Description
As shown in fig. 1, the yarn discharging and solidifying device of the additive manufacturing execution head comprises a main board 1 and a base 2 installed on the main board 1, wherein a yarn discharging port vibration shaping device 3 is fixed below the base 2, and the yarn discharging port vibration shaping device 3 comprises a connecting rod 4, an elastic mechanism 5, a yarn discharging port vibration mechanism 6 and a yarn discharging head 7 fixed at the lower end of the yarn discharging port vibration mechanism 6; the upper end of the connecting rod 4 is connected with the base 2, the lower end of the connecting rod is fixed with the elastic mechanism 5, and the elastic mechanism 5 is movably connected with the yarn outlet vibrating mechanism 6; light source devices 8 for photocuring are further arranged on two sides of the lower portion of the main board 1.
As shown in fig. 2, a plurality of coaxial yarn guiding rings 41 are fixed along the axial direction of the connecting rod 4, the yarn guiding rings 41 are horizontally fixed on the side surface of the connecting rod 4, and the yarn bundle of the fiber yarn enters the yarn outlet end through the yarn guiding rings 41, so that the yarn bundle is ensured not to deviate.
As shown in fig. 3 and 4, the elastic mechanism 5 includes a limit base 51, a spring 52 and an end cap 53; the upper part of the limiting base 51 is a cylinder, the lower part of the limiting base 51 is a rectangular body, the cylinder at the upper part of the limiting base 51 is fixed with the lower part of the connecting rod 4, two side surfaces of the rectangular body at the lower part are provided with first waist holes 511 of which the orifices are vertical to the axial direction of the connecting rod 4, and the length direction of the first waist holes 511 is parallel to the axial direction of the connecting rod 4; the lower part of the limiting base 51 is elastically fixed with the first waist hole 511 through a limiting shaft 61 fixed on the yarn outlet vibration mechanism 6, two limiting shafts 61 are respectively fixed at the first waist hole 511, and the limiting base 51 makes a linear reciprocating motion along the first waist hole 511.
The lower part of the limiting base 51 is provided with a spring hole 512 for placing a spring, the top surface of the end cover 53 is provided with an end cover boss for sleeving the spring 52, the upper end of the spring 52 is abutted against the end surface of the spring hole 512, the lower end of the spring 52 is sleeved on the end cover boss, and the height of the spring hole 512 meets the requirement that the length of the spring higher than the spring hole 512 is equal to the length of the first waist hole 511 after the installation.
The side surface of the limiting base 51 is provided with a guide pore plate 9 parallel to the yarn guide ring 41, the guide pore plate 9 is a Z-shaped plate, the upper end surface of the Z shape is provided with a guide hole 91, the lower end surface of the Z shape is fixed on the limiting base 51, the guide hole 91 is coaxial with the yarn guide ring 41, and the yarn bundle passes through the yarn guide ring 41 and then passes through the guide hole 91.
The yarn outlet vibration mechanism 6 comprises a vibration yarn outlet base 62 and a vibration element 63, a rectangular through hole is formed in the middle of the vibration yarn outlet base 62, the lower portion of the limiting base 51 is matched with the rectangular through hole, and an end cover 53 abutted against the spring 52 is fixed to the lower end of the rectangular through hole.
The vibrating elements 63 are symmetrically arranged on two sides of the vibrating yarn outlet base 62 and provide vibrating power for the yarn outlet vibrating mechanism 6.
The vibration yarn outlet base 62 is provided with a yarn outlet head 7 at a position coaxial with the guide hole 91; eight positioning surfaces parallel to the moving direction of the yarn bundle are arranged on the side surface of the yarn outlet head 7, and the positioning surfaces are fixed with the vibration yarn outlet base 62 through puller bolts, so that the yarn outlet head is prevented from deflecting due to vibration in work.
The lower end of the yarn outlet head 7 is provided with a finishing boss 71, and the inner side surface of the finishing boss 71 is provided with an outer oblique angle of 0.5-10 degrees.
As shown in fig. 5, the light source device 8 includes a first link 81 fixed to the main board 1, a three-link mechanism 82 connected to the first link 81, a light source holder 83 connected to the other end of the three-link mechanism 82, and a light source 84 fixed inside the light source holder 83, the three-link mechanism 82 is connected end to end, and each link mechanism is fixed by bolts.
The mainboard 1 is provided with a second waist hole 11 in the horizontal direction, the first connecting rod 81 penetrates through the second waist hole 11 and moves and adjusts in the second waist hole 11 in the horizontal direction, one end of the first connecting rod 81 is provided with threads, and the first connecting rod 81 is fixed with the mainboard 1 through nuts after being adjusted to a proper position.
The number of the light source devices 8 is 2, the light source devices are symmetrically distributed on two sides of the yarn outlet vibration shaping device 3, dead corners in photocuring can be eliminated by the symmetrically distributed light source devices 8, and the photocuring efficiency is improved.
Adjusting the yarn bundle of the fiber yarn to pass through the yarn guide ring 41 and the guide pore plate 9 to reach the outlet of the yarn outlet head 7, wherein the yarn outlet head 7 is abutted against the fiber yarn, the pressure applied to the yarn outlet head 7 is transmitted to the elastic mechanism 5 through the yarn outlet vibration mechanism 6, and the spring 52 in the elastic mechanism 5 is stressed to generate resilience force, so that the yarn outlet head 7 elastically extrudes yarn layers; the yarn outlet vibrating mechanism 6 is started, and the vibrating element 63 fixed on the yarn outlet base 62 enables the yarn outlet head 7 and the elastic mechanism 5 to vibrate together, the elastic mechanism 5 generates elastic force, and the elastic force is matched with the vibration to further vibrate and extrude among fiber yarn layers, so that interlayer combination is strengthened.
Adjusting the first link 81 and the three-link mechanism 82 of the light source device 8 to position the light source at a proper position, then adjusting the light source seat 83 to position the light source at a proper angle, finally fixing each connecting part of the light source device 8, and starting a printing program to start a printing operation; in the printing operation, the fiber yarn at the yarn discharge head 7 is photocured by the light source device 8.
Claims (9)
1. The utility model provides a yarn and solidification equipment that play of head is carried out in additive manufacturing, includes mainboard (1) and installs base (2) on mainboard (1), its characterized in that: a yarn outlet vibration shaping device (3) is fixed below the base (2), and the yarn outlet vibration shaping device (3) comprises a connecting rod (4), an elastic mechanism (5), a yarn outlet vibration mechanism (6) and a yarn outlet head (7) fixed at the lower end of the yarn outlet vibration mechanism (6); the upper end of the connecting rod (4) is connected with the base (2), the lower end of the connecting rod is fixed with the elastic mechanism (5), and the elastic mechanism (5) is movably connected with the yarn outlet vibrating mechanism (6); light source devices (8) for photocuring are further arranged on two sides of the lower part of the main board (1);
the elastic mechanism (5) comprises a limiting base (51), an elastic element (52) and an end cover (53); the upper part of the limiting base (51) is a cylinder, the lower part of the limiting base (51) is a rectangular body, the cylinder at the upper part of the limiting base (51) is fixed with the lower part of the connecting rod (4), two side faces of the rectangular body at the lower part are provided with first waist holes (511) with orifices vertical to the axial direction of the connecting rod (4), and the length direction of the first waist holes (511) is parallel to the axial direction of the connecting rod (4); the elastic element (52) is arranged between the limiting base (51) and the end cover (53), and the lower part of the limiting base (51) is elastically fixed with the first waist hole (511) through a limiting shaft (61) fixed on the yarn outlet vibrating mechanism (6).
2. The thread take-off and curing device of an additive manufacturing execution head of claim 1, wherein: a plurality of coaxial yarn guide rings (41) are fixed along the axial direction of the connecting rod (4), and the yarn guide rings (41) are horizontally fixed on the side surface of the connecting rod (4).
3. The thread take-off and curing device of an additive manufacturing execution head of claim 1, wherein: the side of limiting base (51) is equipped with guide hole plate (9) parallel with yarn guide ring (41), guide hole plate (9) are Z shape plate, the up end of Z shape is opened there is pilot hole (91), the lower extreme of Z shape is fixed in limiting base (51), pilot hole (91) and yarn guide ring (41) coaxial setting.
4. The thread take-off and curing device of an additive manufacturing execution head of claim 1, wherein: the elastic element (52) is a spring, a spring hole (512) for placing the spring is formed in the lower portion of the limiting base (51), an end cover boss for sleeving the spring is arranged on the top face of the end cover (53), and the height of the spring hole (512) meets the requirement that the length of the spring, which is higher than the spring hole (512), is larger than or equal to the length of the first waist hole (511) after the spring is installed.
5. The thread take-off and curing device of an additive manufacturing execution head of claim 1, wherein: the yarn outlet vibration mechanism (6) comprises a vibration yarn outlet base (62) and a vibration element (63), a rectangular through hole matched with the lower part of the limiting base (51) is formed in the middle of the vibration yarn outlet base (62), and the lower part of the vibration yarn outlet base is fixed with the end cover (53); the vibrating elements (63) are symmetrically arranged on the left side and the right side of the vibrating yarn outlet base (62).
6. The thread take-off and curing device of an additive manufacturing execution head of claim 5, wherein: the vibration yarn outlet base (62) is provided with a yarn outlet head (7) at a position coaxial with the guide hole (91); the side of the yarn outlet head (7) is provided with a plurality of positioning surfaces parallel to the moving direction of the yarn bundle, and the positioning surfaces are fixed with the vibration yarn outlet base (62) through positioning pieces.
7. The thread take-off and curing device of an additive manufacturing execution head of claim 1, wherein: the lower end of the yarn outlet head (7) is provided with a finishing boss (71), and the inner side surface of the finishing boss (71) is provided with an outer oblique angle of 0.5-10 degrees.
8. The thread take-off and curing device of an additive manufacturing execution head of claim 1, wherein: the light source device (8) comprises a first connecting rod (81) movably connected to the main board (1), a multi-connecting-rod mechanism (82) connected with the first connecting rod (81), a light source seat (83) connected to the other end of the multi-connecting-rod mechanism (82) and a light source (84) fixed inside the light source seat (83); the main board (1) is provided with a second waist hole (11) in the horizontal direction, and the first connecting rod (81) penetrates through the second waist hole (11) and moves and adjusts along the second waist hole (11).
9. The thread take-off and curing device of an additive manufacturing execution head of claim 8, wherein: the number of the light source devices (8) is 2, and the light source devices are symmetrically distributed on two sides of the yarn outlet vibration shaping device (3).
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| CN202011608507.7A CN112659547B (en) | 2020-12-30 | 2020-12-30 | Yarn discharging and curing device of additive manufacturing execution head |
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| CN202011608507.7A CN112659547B (en) | 2020-12-30 | 2020-12-30 | Yarn discharging and curing device of additive manufacturing execution head |
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| CN105383060A (en) * | 2015-12-07 | 2016-03-09 | 济南鲁洋科技有限公司 | 3D printing device integrating material supplying, fluxing and crystal leveling assistance |
| CN106915079A (en) * | 2017-04-18 | 2017-07-04 | 中国科学院宁波材料技术与工程研究所 | A kind of continuous carbon fibre 3D printing device |
| 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 |
| CN110370631A (en) * | 2019-05-31 | 2019-10-25 | 北京机科国创轻量化科学研究院有限公司 | A kind of interlaminar improvement composite material 3D printing device |
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2020
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105383060A (en) * | 2015-12-07 | 2016-03-09 | 济南鲁洋科技有限公司 | 3D printing device integrating material supplying, fluxing and crystal leveling assistance |
| CN106915079A (en) * | 2017-04-18 | 2017-07-04 | 中国科学院宁波材料技术与工程研究所 | A kind of continuous carbon fibre 3D printing device |
| 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 |
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