A kind of rail forming device and preparation method of composite truss rod based on pultrusion

Abstract

The application discloses a kind of based on pultrusion composite truss rod in rail forming device and preparation method, including frame, main beam feeding mechanism, main beam tensioning mechanism, inclined beam winding mechanism and welding and guiding mechanism are sequentially fixed on frame from below to top.The application adopts pultrusion+heat welding forming process, utilizes the collaborative operation of main beam tensioning and inclined beam winding reinforcement to realize the continuous, efficient forming of one-dimensional truss rod, can effectively improve the product forming precision and quality of in-orbit additive manufacturing, effectively solve the problem that the structure size of beam structure represented by space truss is limited and constrained by rocket carrying space and severe mechanical environment in launch process, difficult to realize ground large-size preparation, folding, space large-area deployment.

Description

Technical Field

[0001] This invention relates to the field of on-orbit manufacturing technology, and in particular to an on-orbit forming device and preparation method for composite truss rods based on pultrusion molding. Background Technology

[0002] Currently, with the exception of the space station, all spacecraft are manufactured and tested on the ground before being launched into orbit by launch vehicles. To fit the entire spacecraft into the launch vehicle's fairing, the size of the spacecraft's payload is severely constrained, greatly limiting performance improvements. Furthermore, to withstand the harsh mechanical environment of launch, the spacecraft's structure must be reinforced, but these reinforcements are "useless" in the microgravity environment after entering orbit. To address these issues, leading spacefaring nations have begun researching and developing on-orbit additive manufacturing technology.

[0003] In-space additive manufacturing (ISM), also known as "in-situ manufacturing in orbit for service in space," overcomes the stringent limitations imposed by launch vehicles on payload size and weight, enabling the in-orbit manufacturing of spacecraft structures and components of varying sizes, thus improving the flexibility of space missions. Furthermore, the microgravity environment simplifies spacecraft structural and strength design, allowing for the manufacture of large structures from small components. ISM devices for in-orbit applications differ from those commonly used on Earth, requiring consideration not only of in-orbit resources and energy but also of automation and predictable performance of manufactured products. Therefore, ISM devices for in-orbit applications necessitate targeted design.

[0004] In summary, given the application requirements of future large-scale space loads and large-scale space truss structures, the traditional ground-based manufacturing and on-orbit deployment mode is no longer sufficient to meet these needs. Developing space-based on-orbit manufacturing technology and developing on-orbit additive manufacturing devices has become the only way to solve the problem of on-orbit application of future large-scale space structures. Summary of the Invention

[0005] In view of this, the present invention provides an on-orbit forming device and preparation method for composite truss rods based on pultrusion molding, which solves the problem of the need for on-orbit manufacturing of large truss structures and functional components such as high-orbit stations and medium-high orbit reconnaissance satellites, and fills a part of the gap in the field of space manufacturing technology for on-orbit forming devices for truss rods.

[0006] A pultrusion-based on-orbit forming device for composite truss rods includes a frame, a main beam feeding mechanism, a main beam tensioning mechanism, an inclined beam winding mechanism, and a welding and guiding mechanism, which are fixed to the frame from bottom to top.

[0007] The main beam tensioning mechanism is used to tension and press the main beam prepreg conveyed by the main beam feeding mechanism into a set configuration. The main beam tensioning mechanism includes a pre-forming guide mechanism for heating and plasticizing the main beam prepreg conveyed into a semi-formed state, a forming guide mechanism for heating and plasticizing the semi-formed main beam prepreg conveyed into a formed state, and a main beam rolling mechanism for cooling and shaping the formed main beam prepreg conveyed upward by rolling. Multiple pre-forming guide mechanisms, forming guide mechanisms and main beam rolling mechanisms are provided. The multiple pre-forming guide mechanisms, forming guide mechanisms and main beam rolling mechanisms are evenly distributed in the circumferential direction and are arranged in a one-to-one correspondence between the upper and lower parts.

[0008] The inclined beam winding mechanism is used to convey the inclined beam prepreg tape and wind the inclined beam prepreg tape onto the formed main beam prepreg tape. The inclined beam winding mechanism is provided with two layers, and the upper and lower inclined beam winding mechanisms rotate in opposite directions so that their respective inclined beam prepreg tapes are spirally wound onto the main beam prepreg tape in different winding directions.

[0009] The welding and guiding mechanism is used to weld and fix the intersection between the prepreg strips of the main beam and the prepreg strips of the inclined beam to form a truss and to transport the truss upward.

[0010] Preferably, the main beam feeding mechanism includes a feeding base plate and multiple sets of main beam feeding assemblies fixed on the feeding base plate. The multiple sets of main beam feeding assemblies are evenly distributed in the circumferential direction, and their arrangement positions correspond to the arrangement positions of the preforming guide mechanism.

[0011] The main beam feeding assembly includes a raw material wheel support frame, a main beam raw material wheel, and a tension adjusting spring. The raw material wheel support frame is fixed to the feeding base plate. There are slots on two opposite sides of the raw material wheel support frame. The main beam raw material wheel is vertically installed inside the raw material wheel support frame, and its axle passes through the slot. The end of the axle of the main beam raw material wheel is fixed to one end of the tension adjusting spring. The other end of the tension adjusting spring is fixed to the outer side of the raw material wheel support frame. A limit block is fixed on the side of the raw material wheel support frame facing the groove of the main beam raw material wheel. A gap is formed between the limit block and the side of the raw material wheel support frame. A cutting blade is fixed on the limit block to cut the main beam prepreg tape in the width direction according to the size requirements of different trusses. A roll of main beam prepreg tape is installed on the main beam raw material wheel. After being led out from the main beam raw material wheel, the main beam prepreg tape passes vertically upward through the gap and enters the semi-forming hole of the preforming guide mechanism.

[0012] Preferably, the preforming guide mechanism includes a preforming block, inside which is provided a preforming heating mold and a preforming heating pipe for heating the preforming heating mold. The preforming heating mold is provided with a semi-forming hole for allowing the main beam prepreg tape to pass upward and thermoplastically form a semi-formed state during the passage. A preforming temperature sensor is provided on the outside of the preforming block.

[0013] The molding guide mechanism includes a molding block, inside which is a molding heating mold and a molding heating tube for heating the molding heating mold. The molding heating mold is provided with molding holes for allowing the semi-molded main beam prepreg tape to pass upward and be thermoplasticized into a molded state during the passage. A molding temperature sensor is provided on the outside of the pre-molded block.

[0014] Preferably, the main beam rolling mechanism includes a motor mounting base, a rolling base, a rolling motor, a main beam pressing wheel, a rolling wheel, and a pressing force adjustment assembly. The motor mounting base and the rolling base are both fixed on the frame. The rolling motor is fixed on the motor mounting base and its output shaft extends into the rolling base. The main beam pressing wheel is fixed on the output shaft of the rolling motor. The rolling wheel is located on one side of the main beam pressing wheel, and a first pressing gap is formed between them to allow the prepreg tape of the formed main beam to pass through. The pressing force adjustment assembly is respectively located on both sides of the rolling base to adjust the size of the gap of the first pressing gap. The wheel axle of the rolling wheel is fixed to two sets of pressing force adjustment assemblies respectively.

[0015] Preferably, the clamping force adjusting assembly includes two guide rails arranged opposite each other, a slider movably arranged on the guide rails, a sliding connecting plate connected between the two sliders, a rotating handle passing through one end of the roller seat, and a first clamping spring. One end of the first clamping spring is fixed to the rotating handle, and the other end is clamped on the side edge of the sliding connecting plate. The end of the first clamping spring that is clamped on the sliding connecting plate is provided with a locking slot.

[0016] Preferably, the inclined beam winding mechanism includes an inclined beam base plate, a ring motion assembly fixed on the inclined beam base plate, and an inclined beam feeding mechanism fixed on the ring motion assembly and rotating under the drive of the ring motion assembly. The inclined beam feeding mechanism includes an inclined beam raw material support, an inclined beam raw material wheel fixed in a horizontal position inside the inclined beam raw material support, an inclined beam roller support connected to the inclined beam raw material support by a connecting spring, and an inclined beam roller fixed in a horizontal position inside the inclined beam roller support. The inclined beam roller support is located on the side of the inclined beam raw material support facing the main beam prepreg tape. The inclined beam prepreg tape is led out from the inclined beam raw material wheel, wrapped around the outside of the inclined beam raw material support, and then wrapped around the inclined beam roller and onto the main beam prepreg tape.

[0017] Preferably, the annular motion assembly includes an annular guide rail and rotating wheels fixed on the upper surface of the inclined beam base plate, a winding motor fixed on the lower surface of the inclined beam base plate, and a drive gear. The output axis of the winding motor passes through the inclined beam base plate and is fixed to the drive gear. The drive gear meshes with the annular guide rail. Multiple rotating wheels are provided on the outer circumference of the annular guide rail and the two are rotatably connected.

[0018] The upper inclined beam winding mechanism is equipped with one set of inclined beam feeding mechanisms, and the lower inclined beam winding mechanism is equipped with two sets of inclined beam feeding mechanisms.

[0019] Preferably, the welding and guiding mechanism includes an external guide wheel assembly and an inner liner assembly. Multiple sets of external guide wheel assemblies are provided, evenly distributed circumferentially, and their positions correspond to the arrangement of the main beam rolling mechanism. Each set of external guide wheel assemblies has a welding tool on one side for welding and fixing the intersection between the main beam prepreg strip and the inclined beam prepreg strip to form a truss.

[0020] The inner lining assembly includes an inner lining core, which extends vertically downward from the center of the frame into the frame and its bottom is fixed to the frame frame at the height of the main beam rolling mechanism. The inner lining core is provided with an internal pressing wheel and a follower wheel. The internal pressing wheel is opposite to the external guide wheel assembly, and the internal pressing wheel and the follower wheel are arranged in a one-to-one correspondence. The follower wheel is located on the inner lining core between the inclined beam winding mechanism and the welding and guiding mechanism, and the wheel surface of the follower wheel is completely fitted with the shape of the main beam prepreg tape to maintain the support truss structure and transport the truss upward.

[0021] Preferably, the external guide wheel assembly includes a pressure wheel seat, an external spring pressure wheel, a pulley, and an adjusting rod. The external spring pressure wheel is disposed inside the pressure wheel seat and forms a second pressure gap between it and the internal pressure wheel. One end of the axle of the external spring pressure wheel is fixed to a pulley disposed outside the pressure wheel seat. The adjusting rod passes through the pressure wheel seat and is fixed to the external spring pressure wheel to adjust the size of the gap in the second pressure gap.

[0022] A method for preparing composite truss members using the aforementioned apparatus specifically includes the following steps:

[0023] S1, the main beam prepreg tape of the main beam feeding mechanism is sequentially conveyed upward to the preforming guide mechanism, the forming guide mechanism and the main beam rolling mechanism. When the main beam prepreg tape passes through the preforming guide mechanism, the preforming guide mechanism heats and shapes it into a semi-formed state. When the semi-formed main beam prepreg tape passes through the forming guide mechanism, the forming guide mechanism heats and shapes it into a formed state. When the formed main beam prepreg tape passes through the first pressing slot of the main beam rolling mechanism, the main beam rolling mechanism cools and shapes it and rolls it upward.

[0024] S2, when the formed main beam prepreg tape is conveyed upward to the inclined beam winding mechanism, the upper and lower inclined beam winding mechanisms rotate left and right respectively under the drive of their respective winding motors, so that their respective inclined beam prepreg tapes are spirally wound on the main beam prepreg tape in different winding directions;

[0025] S3, the main beam prepreg strip, which is wrapped with the inclined beam prepreg strip, continues to move upward under the transmission action of the follower wheel and the main beam roller pressing mechanism. When the main beam prepreg strip, which is wrapped with the inclined beam prepreg strip, passes through the second pressing seam, the welding tool welds and fixes the intersection between the main beam prepreg strip and the inclined beam prepreg strip to form a one-dimensional composite truss structure.

[0026] S4. Repeat the pultrusion molding process of the one-dimensional composite truss structure described above until the fabrication of the one-dimensional composite truss structure of the designed length is completed.

[0027] The beneficial effects of this invention are:

[0028] 1. This invention employs a pultrusion molding + hot welding molding process, utilizing the synergistic operation of main beam tension and compression and inclined beam winding reinforcement to achieve continuous and efficient forming of one-dimensional truss rods. This effectively improves the forming accuracy and quality of products manufactured in orbital additive manufacturing. It effectively solves the problem that the structural dimensions of rod and beam structures, represented by space trusses, are limited by the harsh mechanical environment of rocket launch space and launch process, making it difficult to achieve large-scale preparation, collapsing, and large-area deployment on the ground. At the same time, this invention can also realize the preparation of composite truss rod structural units of different lengths and cross-sectional dimensions, especially the preparation of ultra-long one-dimensional truss rods, which has significant engineering guiding significance for the field of space-based on-orbit forming additive manufacturing devices.

[0029] 2. This invention fixes the main beam feeding mechanism, main beam tensioning mechanism, inclined beam winding mechanism, and welding and guiding mechanism to the frame sequentially from bottom to top. The main beam prepreg conveyed by the main beam feeding mechanism is first thermoplastically deformed into a specific shape by the main beam tensioning mechanism. Then, the main beam prepreg conveyed with the specific shape is conveyed upward and wound with the inclined beam prepreg conveyed by the inclined beam winding mechanism. Finally, the welding and guiding mechanism is used to weld and fix the intersection of the main beam prepreg conveyed and the inclined beam prepreg conveyed to form a truss. This invention can effectively ensure the forming quality and effect of the truss, and also improve the truss manufacturing efficiency.

[0030] 3. This invention sets up two layers of inclined beam winding mechanisms above the main beam tension and compression mechanism, and makes the rotation directions of the two layers of inclined beam winding mechanisms opposite. This allows their respective inclined beam prepreg tapes to be spirally wound onto the already cured and shaped main beam prepreg tape in different winding directions. The right-hand and left-hand forming of the inclined beams are completed at the same time. While ensuring the truss forming quality and structural stability, it can also improve the truss manufacturing efficiency.

[0031] 4. In this invention, the external guide wheel assembly of the welding and guiding mechanism extends vertically downward from the center of the frame into the frame and fixes its bottom to the frame body at the height of the main beam roller pressing mechanism. When the prepreg tape of the inclined beam is wrapped around the prepreg tape of the main beam to form a one-dimensional composite truss configuration (at this time, the intersection node between the prepreg tape of the main beam and the prepreg tape of the inclined beam is not fixedly connected), the follower wheel of the external guide wheel assembly supports the inner side of the prepreg tape of the main beam, thereby maintaining the configuration of the supporting truss and preventing the shape of the truss from deforming during the upward transmission process. At the same time, it can also ensure the accuracy of the truss conveying direction.

[0032] 5. By setting the inclined beam feeding structure of the inclined beam winding mechanism in a horizontal position, this invention can ensure that the inclined beam prepreg tape is wound vertically on the main beam prepreg tape. During the traction and winding process of the inclined beam prepreg tape, there will be no problems such as turning or twisting, which can effectively ensure the forming quality of the truss. Attached Figure Description

[0033] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 This is a front view of an on-orbit forming device for composite truss rods based on pultrusion molding.

[0035] Figure 2 This is an isometric schematic diagram of the main beam feeding mechanism.

[0036] Figure 3 This is a front view of the main beam tension and compression mechanism.

[0037] Figure 4 This is an isometric schematic diagram of the preforming guide mechanism.

[0038] Figure 5 This is an isometric schematic diagram of the forming guide mechanism.

[0039] Figure 6 This is an equiaxed side schematic diagram of the main beam roller pressing mechanism.

[0040] Figure 7 This is a top view of the main beam roller pressing mechanism during installation.

[0041] Figure 8 This is a front view of the inclined beam winding mechanism.

[0042] Figure 9 This is a three-dimensional structural diagram of the inclined beam winding mechanism.

[0043] Figure 10 This is a top view of the welding and guiding mechanism.

[0044] Figure 11 This is a schematic diagram of the equiaxial side of the external guide wheel assembly.

[0045] Figure 12 This is a top view of the external guide wheel assembly.

[0046] Figure 13 This is a schematic diagram of removing the cover plate of the pressure wheel seat from the external guide wheel assembly.

[0047] Figure 14This is an isometric view of the inner liner assembly.

[0048] Figure 15 This is a schematic diagram of the follower wheel support truss structure of the inner lining component.

[0049] Figure 16 This is a schematic diagram of the follower wheel support truss structure of the inner lining component.

[0050] The meanings of the labels in the diagram are as follows:

[0051] 1 is the main beam feeding mechanism, 11 is the slot, 12 is the main beam raw material wheel, 13 is the limiting block, 14 is the tension adjusting spring, 15 is the raw material wheel support frame, 16 is the cutting blade, 17 is the feeding base plate, and 18 is the clearance.

[0052] 2 is the main beam tension / compression mechanism.

[0053] 21 is the preforming guide mechanism, 21-1 is the preforming block, 21-2 is the preforming heating mold, 21-3 is the preforming temperature sensor, 21-4 is the preforming heating tube, and 21-5 is the semi-forming hole.

[0054] 22 is the forming guide mechanism, 22-1 is the forming block, 22-2 is the forming heating mold, 22-3 is the forming temperature sensor, 22-4 is the forming heating tube, and 22-5 is the semi-forming hole.

[0055] 23 is the main beam roller pressing mechanism; 23-1 is the roller pressing seat; 23-2 is the bayonet; 23-3 is the roller pressing wheel; 23-4 is the sliding connecting plate; 23-5 is the first clamping spring; 23-6 is the slider; 23-7 is the rotating handle; 23-8 is the guide rail; 23-9 is the motor mounting base; 23-10 is the roller pressing motor; 23-11 is the main beam clamping wheel; and 23-12 is the first clamping seam.

[0056] 3 is a slanted beam winding mechanism.

[0057] 31 is the bottom plate of the inclined beam.

[0058] 32 is a ring-shaped motion component, 32-1 is a ring-shaped guide rail, 32-2 is a rotating wheel, 32-3 is a winding motor, and 32-4 is a drive gear.

[0059] 33 is the inclined beam feeding mechanism, 33-1 is the inclined beam raw material support, 33-2 is the inclined beam raw material wheel, 33-3 is the connecting spring, 33-4 is the inclined beam roller support, and 33-5 is the inclined beam roller.

[0060] 4 is the welding and guiding mechanism; 41 is the follower wheel; 42 is the pressure wheel seat; 42-1 is the slide groove; 43 is the inner pressure wheel; 44 is the inner lining core; 45 is the outer spring pressure wheel; 45-1 is the sliding shell; 45-2 is the spring pressure wheel; 45-3 is the second pressure spring; 46 is the pulley; 47 is the welding tool; 48 is the adjusting rod; 49 is the second pressure seam.

[0061] 5 represents the truss.

[0062] 6 is the framework,

[0063] 7 is the pre-soaked strip for the main beam.

[0064] 8 represents the prepreg strip for inclined beams. Detailed Implementation

[0065] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0066] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0067] It should be understood that although the terms first, second, third, etc., may be used in this disclosure to describe various information, such information should not be limited to these terms and should not be construed as indicating or implying relative importance. These terms are used only to distinguish information of the same type from one another. For example, without departing from the scope of this disclosure, first information may also be referred to as second information, and similarly, second information may also be referred to as first information. Depending on the context, the word "if" as used herein may be interpreted as "when," "when," or "in response to determination."

[0068] In the description of this invention, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "linking" should be interpreted broadly. For example, they can refer to mechanical or electrical connections, or internal connections between two components. They can be direct connections or indirect connections through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms according to the specific circumstances.

[0069] To better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0070] This invention provides an on-orbit forming device for composite truss rods based on pultrusion molding, comprising a frame 6, and, from bottom to top, a main beam feeding mechanism 1, a main beam tensioning mechanism 2, a diagonal beam winding mechanism 3, and a welding and guiding mechanism 4, all fixed to the frame 6. The main beam feeding mechanism 1 is used to convey the main beam prepreg tape 7 upwards. The main beam tensioning mechanism 2 is used to tension and compress the main beam prepreg tape 7 conveyed by the main beam feeding mechanism 1 into a predetermined configuration. The diagonal beam winding mechanism 3 is used to convey the diagonal beam prepreg tape 8 and wind it around the formed main beam prepreg tape 7. The welding and guiding mechanism 4 is used to weld and fix the intersection between the main beam prepreg tape 7 and the diagonal beam prepreg tape 8 to form a truss 5 and to convey the truss 5 upwards.

[0071] By sequentially fixing the main beam feeding mechanism 1, the main beam tensioning mechanism 2, the inclined beam winding mechanism 3, and the welding and guiding mechanism 4 onto the frame 6 from bottom to top, the main beam prepreg tape 7 conveyed by the main beam feeding mechanism 1 is first thermoplastically deformed into a specific shape by the main beam tensioning mechanism 2. Then, the main beam prepreg tape 7 with the specific shape is conveyed upward and wound with the inclined beam prepreg tape 8 output by the inclined beam winding mechanism 3. Finally, the welding and guiding mechanism 4 is used to weld and fix the intersection between the main beam prepreg tape 7 and the inclined beam prepreg tape 8 to form the truss 5. This can effectively ensure the forming quality and effect of the truss 5, and also improve the preparation efficiency of the truss 5.

[0072] Specifically, the main beam feeding mechanism 1 includes a feeding base plate 17 and multiple sets of main beam feeding assemblies fixed on the feeding base plate 17. The feeding base plate 17 is fixed at the bottom of the frame 6. The multiple sets of main beam feeding assemblies are evenly distributed in the circumferential direction, such as... Figure 2 As shown, in this embodiment, three sets of main beam feeding assemblies are fixed on the feeding base plate 17, and the three sets of main beam feeding assemblies are arranged around the center point of the feeding base plate 17 at 120° intervals.

[0073] The main beam feeding assembly includes a raw material wheel support frame 15, a main beam raw material wheel 12, and a tension adjusting spring 14. The raw material wheel support frame 15 is fixed on the feeding base plate 17. Grooves 11 are provided on two opposite sides of the raw material wheel support frame 15. The main beam raw material wheel 12 is vertically positioned within the raw material wheel support frame 15, with its axle passing through the groove 11. The end of the axle of the main beam raw material wheel 12 is fixed to one end of the tension adjusting spring 14, and the other end of the tension adjusting spring 14 is fixed to the outer surface of the raw material wheel support frame 15. The tension adjusting spring 14 is used to adjust the conveying tension of the main beam prepreg belt 8 wound on the main beam raw material wheel 12. That is, if it is necessary to increase the conveying tension of the main beam prepreg belt 8, the tension adjusting spring 14 is replaced to reduce the distance between the wheel surface of the main beam raw material wheel 12 and the side of the raw material wheel support frame 15. If it is necessary to reduce the conveying tension of the main beam prepreg belt 8, the tension adjusting spring 14 is replaced to increase the distance between the wheel surface of the main beam raw material wheel 12 and the side of the raw material wheel support frame 15, thereby ensuring the stable conveying of the main beam prepreg belt 8.

[0074] A limiting block 13 is fixed on the side of the raw material wheel support frame 15 facing the groove of the main beam raw material wheel 12. A gap 18 is formed between the limiting block 13 and the side of the raw material wheel support frame 15. The limiting block 13 is used to maintain the positional accuracy of the main beam prepreg tape. In this embodiment, the limiting block 13 has a convex structure. The limiting block 13 is fixed to the side of the raw material wheel support frame 15 by fasteners such as bolts or screws, thereby forming a gap 18 between the two. A cutting blade 16 is also fixed on the limiting block 13 for cutting the main beam prepreg tape in the width direction according to the size requirements of the truss 5 to be prepared. The main beam raw material wheel 12 is equipped with a rolled main beam prepreg tape. After being led out from the main beam raw material wheel 12, the main beam prepreg tape passes vertically upward through the gap 18 and enters the main beam tension and compression mechanism 2 for tension and compression forming.

[0075] The main beam tensioning mechanism 2 includes, from bottom to top, a pre-forming guide mechanism 21 for heating and shaping the prepreg tape of the main beam into a semi-formed state, a forming guide mechanism 22 for heating and shaping the semi-formed prepreg tape of the main beam into a formed state, and a main beam rolling mechanism 23 for cooling and shaping the formed prepreg tape of the main beam and rolling it upwards. Multiple pre-forming guide mechanisms 21, forming guide mechanisms 22 and main beam rolling mechanisms 23 are provided. The multiple pre-forming guide mechanisms 21, forming guide mechanisms 22 and main beam rolling mechanisms 23 are evenly distributed in the circumferential direction. The arrangement positions of the pre-forming guide mechanisms 21, forming guide mechanisms 22 and main beam rolling mechanisms 23 correspond one-to-one with the arrangement positions of the main beam feeding components.

[0076] The preforming guide mechanism 21 includes a preforming block 21-1. Inside the preforming block 21-1, there is a preforming heating mold 21-2 and a preforming heating tube 21-4 for heating the preforming heating mold 21-2. The preforming heating mold 21-2 is provided with a semi-forming hole 21-5 for allowing the main beam prepreg tape to pass upward and thermoplastically form a semi-formed state during the passage. A preforming temperature sensor 21-3 is provided on the outside of the preforming block 21-1 to detect the heating temperature of the preforming heating mold 21-2.

[0077] The molding guide mechanism 22 includes a molding block 22-1. Inside the molding block 22-1, there is a molding heating mold 22-2 and a molding heating tube 22-4 for heating the molding heating mold 22-2. The molding heating mold 22-2 is provided with molding holes 22-5 for allowing the semi-molded main beam prepreg tape to pass upward and be thermoplasticized into a molded state during the passage. A molding temperature sensor 22-3 is provided on the outside of the pre-molded block 22-1 to detect the heating temperature of the molding heating mold 22-2.

[0078] In this embodiment, the semi-forming hole 21-5 of the preforming guide mechanism 21 is semi-circular arc-shaped, and the forming hole 22-5 of the forming guide mechanism 22 is V-shaped, that is, the main beam prepreg strip eventually becomes V-shaped after passing through the forming guide mechanism 22; according to the configuration requirements of the truss 5, the semi-forming hole 21-5 and the forming hole 22-5 can also be set to other shapes, but the shape of the semi-forming hole 21-5 is always one of the forming states of the planar prepreg strip in the process of transforming into the shape shown in the forming hole 22-5.

[0079] The main beam rolling mechanism 23 includes a motor mounting base 23-9, a rolling base 23-1, a rolling motor 23-10, a main beam pressing wheel 23-11, a rolling wheel 23-3, and a pressing force adjustment assembly. The motor mounting base 23-9 and the rolling base 23-1 are both fixed to the frame 6. The rolling motor 23-10 is fixed to the motor mounting base 23-9, and its output shaft extends into the rolling base 23-1. The main beam pressing wheel 23-11 is fixed to the output shaft of the rolling motor 23-10. The rolling wheel 23-3 is located on one side of the main beam pressing wheel 23-11, and a first pressing slot 23 is formed between them to allow the prepreg tape of the formed main beam to pass through. -12, both the roller 23-3 and the main beam pressing roller 23-11 adopt special configurations to adapt to the shape of the main beam prepreg tape in the forming state. In this embodiment, the roller 23-3 is provided with a groove (V-shaped groove) that matches the shape of the main beam prepreg tape, while the wheel surface of the main beam pressing roller 23-11 is set to match the shape of the main beam prepreg tape (the cross section of the main beam pressing roller 23-11 is V-shaped). In this way, when passing through the first pressing seam 23-12, the outer side of the main beam prepreg tape contacts the groove surface of the roller 23-3, and the inner side of the main beam prepreg tape contacts the wheel surface of the main beam pressing roller 23-11. When the roller press motor 23-10 is started, the roller press motor 23-10 can rotate the main beam pressing wheel 23-11. The main beam pressing wheel 23-11 and the roller press wheel 23-3 respectively roll the main beam prepreg tape from both sides to cool and solidify it. At the same time as rolling, the main beam prepreg tape is also conveyed upward.

[0080] The clamping force adjustment components are respectively installed on both sides of the roller press seat 23-1. The wheel axle of the roller press wheel 23-3 is fixed to the two sets of clamping force adjustment components. When the clamping force adjustment components are adjusted, the clamping force adjustment components can move the roller press wheel 23-3, thereby adjusting the size of the gap of the first clamping gap 23-12 between the roller press wheel 23-3 and the main beam clamping wheel 23-11, so as to control the clamping force of the main beam prepreg strip.

[0081] The clamping force adjustment assembly includes two guide rails 23-8 arranged opposite each other, a slider 23-6 movably arranged on the guide rails 23-8, a sliding connecting plate 23-4 connected between the two sliders 23-6, a rotating handle 23-7 passing through one end of the roller press seat 23-1, and a first clamping spring 23-5. One end of the first clamping spring 23-5 is fixed on the rotating handle 23-7, and the other end is locked on the side edge of the sliding connecting plate 23-4. The end of the first clamping spring 23-5 that is locked on the sliding connecting plate 23-4 is provided with a locking slot 23-2. In this embodiment, the rotating handle 23-7 is provided with threads, and the roller seat 23-1 is provided with corresponding threaded holes. After the rotating handle 23-7 passes through the threaded holes, it is fixed to the first compression spring 23-5. When the rotating handle 23-7 is turned in a certain direction, the first compression spring 23-5 is compressed. Under the action of the elastic force of the first compression spring 23-5, the first compression spring 23-5 pushes the sliding connecting plate 23-4 so that the sliders 23-6 on both sides of the sliding plate 23-6 are on the guide rail 23-7. When the roller 23-4 slides on the roller 23-8, it drives the roller 23-3 to move synchronously, thereby reducing the gap of the first pressing seam 23-12 between the roller 23-3 and the main beam pressing roller 23-11, and increasing the pressing force on the main beam prepreg strip. Conversely, when the handle 23-7 is turned in the opposite direction, the gap of the first pressing seam 23-12 between the roller 23-3 and the main beam pressing roller 23-11 will increase, and the pressing force on the main beam prepreg strip will decrease.

[0082] The clamping force adjustment component can also be configured as other structures that allow adjustment of the relative position between the roller 23-3 and the main beam clamping roller 23-11.

[0083] The aforementioned preforming guide mechanism 21 is located directly above the main beam feeding assembly, the forming guide mechanism 22 is located directly above the preforming guide mechanism 21, and the main beam rolling mechanism 23 is located directly above the forming guide mechanism 22. Driven by the main beam roller pressing mechanism 23, the planar main beam prepreg tape 7 enters the preforming guide mechanism 21. The preforming guide mechanism 21 heats the main beam prepreg tape 7 and deforms it into a preformed state (semi-circular arc) by the shape of its semi-forming holes 21-5. Then, it enters the forming guide mechanism 22. The forming guide mechanism 22 heats the main beam prepreg tape 7 again and further deforms it into a formed state (V-shaped) by the shape of its forming holes 22-5. The formed main beam prepreg tape 7 then passes through the first pressing seam 23-12 of the main beam roller pressing mechanism 23. The roller pressing wheel 23-3 and the main beam pressing wheel 23-11 press the main beam prepreg tape, cool and solidify it, and then convey it upward so that the inclined beam prepreg tape conveyed by the inclined beam winding mechanism 3 is wound on the main beam prepreg tape whose shape has been solidified.

[0084] The inclined beam winding mechanism 3 is located above the main beam rolling mechanism 23. The inclined beam winding mechanism 3 has two layers, and the upper and lower layers of the inclined beam winding mechanism 3 rotate in opposite directions so that their respective inclined beam prepreg tapes are spirally wound on the main beam prepreg tape in different winding directions. That is, the upper and lower layers of the inclined beam winding mechanism 3 can complete the right-hand and left-hand forming of the inclined beam prepreg tape at the same time.

[0085] The upper and lower inclined beam winding mechanisms 3 have identical structures, each including an inclined beam base plate 31, a ring motion assembly 32 fixed on the inclined beam base plate 31, and an inclined beam feeding mechanism 33 fixed on the ring motion assembly 32 and rotating under the drive of the ring motion assembly 32. The ring motion assembly 32 is used to guide and support the inclined beam feeding mechanism 33, and the inclined beam feeding mechanism 33 is used to convey the inclined beam prepreg tape. In this embodiment, the upper inclined beam winding mechanism 3 has one set of inclined beam feeding mechanisms 33, and the lower inclined beam winding mechanism 3 has two sets of inclined beam feeding mechanisms 33.

[0086] Specifically, the annular motion assembly 32 includes an annular guide rail 32-1 and rotating wheels 32-2 fixed on the upper surface of the inclined beam base plate 31, a winding motor 32-3 fixed on the lower surface of the inclined beam base plate 31, and a drive gear 32-4. The output axis of the winding motor 32-3 passes through the inclined beam base plate 31 and is fixed to the drive gear 32-4. The drive gear 32-4 meshes with the annular guide rail 32-1. Multiple rotating wheels 32-2 are arranged on the outer circumference of the annular guide rail 32-1 and the two are rotatably connected.

[0087] The inclined beam feeding mechanism 33 includes an inclined beam raw material support 33-1, an inclined beam raw material wheel 33-2 fixed in a horizontal position within the inclined beam raw material support 33-1, an inclined beam roller support 33-4 connected to the inclined beam raw material support 33-1 via a connecting spring 33-3, and an inclined beam roller 33-5 fixed in a horizontal position within the inclined beam roller support 33-4. The inclined beam roller support 33-4 is located on the side of the inclined beam raw material support 33-1 facing the main beam prepreg tape. A rolled inclined beam prepreg tape 8 is installed on the inclined beam raw material wheel 33-2.

[0088] The winding motor 32-3 is started, and the output shaft of the winding motor 32-3 drives the drive gear 32-4 to rotate. Since the drive gear 32-4 meshes with the annular guide rail 32-1, the annular guide rail 32-1 can rotate synchronously. Since the inclined beam material support 33-1 of the inclined beam feeding mechanism 33 is directly fixed on the annular guide rail 32-1, the annular guide rail 32-1 can drive the inclined beam feeding mechanism 33 to rotate synchronously. When the inclined beam feeding mechanism 33 rotates with the annular guide rail 32-1, the inclined beam prepreg tape 8 is led out from the inclined beam material wheel 33-2, wrapped around the outside of the inclined beam material support 33-1, passed through the inclined beam roller support 33-4, and then wrapped around the inclined beam roller 33-5 before being wound onto the main beam prepreg tape. Since the inclined beam raw material wheel 33-2 is placed horizontally, the inclined beam prepreg tape can be wound vertically on the main beam prepreg tape (the inclined beam prepreg tape is pulled out in the horizontal direction and its tape surface is perpendicular to the ground, that is, the tape surface of the inclined beam prepreg tape is completely in contact with the main beam prepreg tape). During the pulling and winding process of the inclined beam prepreg tape, there will be no problems such as turning or twisting, which can effectively ensure the forming quality of truss 5.

[0089] The welding and guiding mechanism 4 is located on the top layer of the frame 5. The welding and guiding mechanism 4 includes an inner lining assembly and an outer guide wheel assembly.

[0090] The inner lining assembly includes an inner lining core 44, which extends vertically downward from the center of the frame 6 into the frame and its bottom is fixed to the frame frame at the height of the main beam roller pressing mechanism 23. The inner lining core 44 is provided with an internal pressing wheel 43 and a follower wheel 41. The internal pressing wheel 43 is opposite to the external guide wheel assembly and is positioned above the follower wheel 41. The follower wheel 41 is positioned on the inner lining core 44 between the inclined beam winding mechanism 3 and the welding and guiding mechanism 4, and the wheel surface of the follower wheel 41 is completely fitted with the shape of the main beam prepreg tape to maintain the configuration of the supporting truss 5 and to transport the truss 5 upward. That is, when the inclined beam prepreg tape is wound on the main beam prepreg tape to form the configuration of a one-dimensional composite truss 5 (at this time, the intersection node between the main beam prepreg tape and the inclined beam prepreg tape is not fixedly connected), the follower wheel 41 supports the inner side of the main beam prepreg tape to maintain the configuration of the supporting truss 5 and at the same time ensure the accuracy of the conveying direction of the truss 5.

[0091] Multiple internal pressing wheels 43 and follower wheels 41 are provided on the inner lining core 44. The internal pressing wheels 43 and follower wheels 41 are evenly distributed in the circumferential direction, and the internal pressing wheels 43 and follower wheels 41 are arranged in a one-to-one correspondence, with the shape of the internal pressing wheels 43 being the same as that of the follower wheels 41. In this embodiment, the pressing wheels 43 and follower wheels 41 are arranged around the center line of the inner lining core 44 at 120° intervals.

[0092] The external guide wheel assembly is provided in multiple sets, which are evenly distributed in the circumferential direction and their arrangement positions correspond to the arrangement positions of the main beam roller pressing mechanism 23. Each set of external guide wheel assembly is provided with a welding tool 47 on one side for welding and fixing the cross node between the main beam prepreg tape and the inclined beam prepreg tape to form the truss 5. The welding tool 47 uses a heat source to heat the prepreg tape, thereby fixing the cross node between the main beam prepreg tape and the inclined beam prepreg tape into one piece.

[0093] The external guide wheel assembly includes a pressure wheel seat 42, an external spring pressure wheel 45, a pulley 46, and an adjusting rod 48. The external spring pressure wheel 45 is disposed inside the pressure wheel seat 42 and is opposite to the internal pressure wheel 43 to form a second pressure gap 49 between them. One end of the axle of the external spring pressure wheel 45 is fixed to the pulley 46 disposed outside the pressure wheel seat 42. The adjusting rod 48 passes through the pressure wheel seat 42 and is fixed to the external spring pressure wheel 45 to adjust the size of the gap of the second pressure gap 49.

[0094] The pressure wheel seat 42 has two opposite sides with sliding grooves 42-1. The external spring pressure wheel 45 includes a sliding shell 45-1, a spring pressure wheel 45-2, and a second pressure spring 45-3. The sliding shell 45-1 is movably locked in the sliding groove 42-1. The spring pressure wheel 45-2 is fixed in the sliding shell 45-1. One end of the second pressure spring 45-3 is fixed to the outer end face of the sliding shell 45-1, and the other end is fixed to the corresponding end face of the pressure wheel seat 42. The adjusting rod 48 passes through the pressure wheel seat 42 and is fixed to the outer end face of the sliding shell 45-1.

[0095] When the intersection of the prepreg tape of the main beam and the prepreg tape of the inclined beam of the formed one-dimensional composite truss 5 passes through the second clamping seam 49 (at this time, the intersection of the prepreg tape of the main beam and the prepreg tape of the inclined beam is not fixedly connected), the external spring clamping wheel 45 and the internal clamping wheel 43 clamp the prepreg tape from the inside and outside of the V-shaped main beam prepreg tape respectively. The welding tool 47 can use a heat source to heat the prepreg tape, thereby welding and fixing the intersection of the prepreg tape of the main beam and the prepreg tape of the inclined beam into one piece. At the same time, the pulley 46 rotates under the drive of the motor (not shown in the figure), and the pulley 46 can drive the external spring clamping wheel 45 to rotate synchronously, thereby conveying the one-dimensional composite truss 5 upward and providing conveying force for the truss. In this embodiment, the shape of the outer spring clamping wheel 45 is the same as that of the roller clamping wheel 23-3, and it is also provided with a V-shaped groove that matches the shape of the main beam prepreg tape. The shape and material of the inner clamping wheel 43 are the same as those of the follower wheel 41. Both are rubber wheels with a V-shaped cross section. This allows the second clamping seam 49 between the outer spring clamping wheel 45 and the inner clamping wheel 43 to conform to the shape of the main beam prepreg tape, which not only ensures welding accuracy but also maintains the truss structure and ensures the accuracy of the truss conveying direction.

[0096] This invention also provides a continuous and efficient method for fabricating one-dimensional composite trusses, specifically including the following steps:

[0097] S1, the main beam prepreg tape of the main beam feeding mechanism 1 is conveyed upward through the preforming guide mechanism 21, the forming guide mechanism 22 and the main beam rolling mechanism 23 in sequence. When the main beam prepreg tape passes through the preforming guide mechanism 21, the preforming guide mechanism 21 heats and shapes the flat prepreg tape into a semi-circular arc shape. When the semi-shaped main beam prepreg tape passes through the forming guide mechanism 22, the forming guide mechanism 22 heats and shapes it into a V-shaped shape. When the formed main beam prepreg tape passes through the first pressing seam 23-12 of the main beam rolling mechanism 23, the main beam rolling mechanism 23 cools and shapes it and rolls and conveys it upward to form the main beam of the truss 5.

[0098] S2, when the formed main beam prepreg tape is conveyed upward to the inclined beam winding mechanism 3, the upper and lower inclined beam winding mechanisms 3 rotate left and right respectively under the drive of their respective winding motors 32-3, so that their respective inclined beam prepreg tapes are spirally wound upward on the main beam prepreg tape in different winding directions at the same time. In this embodiment, the inclined beam prepreg tape of the lower inclined beam winding mechanism is wound upward on the main beam prepreg tape in a clockwise direction, and the inclined beam prepreg tape of the upper inclined beam winding mechanism is wound upward on the main beam prepreg tape in a counterclockwise direction.

[0099] S3, the main beam prepreg tape, which is wrapped with the inclined beam prepreg tape, continues to move upward under the transmission action of the follower wheel 41 and the main beam roller pressing mechanism 23. When the main beam prepreg tape, which is wrapped with the inclined beam prepreg tape, passes through the second pressing seam 49, the welding tool 47 welds and fixes the intersection between the main beam prepreg tape and the inclined beam prepreg tape to form the lap joint connection, thereby forming a one-dimensional composite truss structure 5.

[0100] Meanwhile, the external spring clamping wheel 45 and the internal clamping wheel 43 guide the one-dimensional composite truss structure 5 and provide upward conveying force through the drive pulley 46 to realize the pultrusion molding manufacturing of the one-dimensional composite truss structure 5.

[0101] S4. Repeat the pultrusion molding process of the one-dimensional composite truss structure 5 as described above until the fabrication of the one-dimensional composite truss structure 5 of the designed length is completed.

[0102] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. An on-orbit forming device for composite truss rods based on pultrusion molding, characterized in that, The system includes a frame, and from bottom to top, a main beam feeding mechanism (1), a main beam tensioning mechanism (2), an inclined beam winding mechanism (3), and a welding and guiding mechanism (4) fixed on the frame. The main beam tensioning mechanism (2) is used to tension and press the main beam prepreg tape conveyed by the main beam feeding mechanism (1) into a set configuration. The main beam tensioning mechanism (2) includes a pre-forming guide mechanism (21) for heating and plasticizing the main beam prepreg tape into a semi-formed state, a forming guide mechanism (22) for heating and plasticizing the semi-formed main beam prepreg tape into a formed state, and a main beam rolling mechanism (23) for cooling and shaping the formed main beam prepreg tape and rolling it upward. There are multiple pre-forming guide mechanisms (21), forming guide mechanisms (22) and main beam rolling mechanisms (23). The multiple pre-forming guide mechanisms (21), forming guide mechanisms (22) and main beam rolling mechanisms (23) are evenly distributed in the circumferential direction and are arranged in a one-to-one correspondence between the top and bottom. The inclined beam winding mechanism (3) is used to convey the inclined beam prepreg tape and wind the inclined beam prepreg tape onto the formed main beam prepreg tape. The inclined beam winding mechanism (3) is provided with two layers. The upper and lower layers of the inclined beam winding mechanism (3) rotate in opposite directions so that their respective inclined beam prepreg tapes are spirally wound onto the main beam prepreg tape in different winding directions. The welding and guiding mechanism (4) is used to weld and fix the intersection between the main beam prepreg strip and the inclined beam prepreg strip to form a truss (5) and to transport the truss (5) upward; The preforming guide mechanism (21) includes a preforming block (21-1), inside which is a preforming heating mold (21-2) and a preforming heating pipe (21-4) for heating the preforming heating mold (21-2). The preforming heating mold (21-2) is provided with a semi-forming hole (21-5) for allowing the main beam prepreg tape to pass upward and to form a semi-formed state through thermoplastic during the passage. A preforming temperature sensor (21-3) is provided on the outside of the preforming block (21-1). The molding guide mechanism (22) includes a molding block (22-1), a molding heating mold (22-2) and a molding heating tube (22-4) for heating the molding heating mold (22-2) are provided inside the molding block (22-1), the molding heating mold (22-2) is provided with a molding hole (22-5) for allowing the semi-molded main beam prepreg tape to pass upward and to be thermoplasticized into a molded state during the passage, and a molding temperature sensor (22-3) is provided on the outside of the molding block (22-1).

2. The on-orbit forming device for composite truss rods based on pultrusion forming according to claim 1, characterized in that, The main beam feeding mechanism (1) includes a feeding base plate (17) and multiple sets of main beam feeding components fixed on the feeding base plate (17). The multiple sets of main beam feeding components are evenly distributed in the circumferential direction and their arrangement positions correspond to the arrangement positions of the preforming guide mechanism (21). The main beam feeding assembly includes a raw material wheel support frame (15), a main beam raw material wheel (12), and a tension adjusting spring (14). The raw material wheel support frame (15) is fixed on the feeding base plate (17). Grooves (11) are located on two opposite sides of the raw material wheel support frame (15). The main beam raw material wheel (12) is vertically positioned within the raw material wheel support frame (15), with its axle passing through the grooves (11). The axle end of the main beam raw material wheel (12) is fixed to one end of the tension adjusting spring (14), and the other end of the tension adjusting spring (14) is fixed to the outer surface of the raw material wheel support frame (15). A limiting block (13) is fixed on the side of the material wheel support frame (15) facing the groove of the main beam material wheel (12). A gap (18) is formed between the limiting block (13) and the side of the material wheel support frame (15). A cutting blade (16) is fixed on the limiting block (13) for cutting the main beam prepreg tape in the width direction according to the size requirements of different trusses. A roll of main beam prepreg tape is installed on the main beam material wheel (12). After the main beam prepreg tape is led out from the main beam material wheel (12), it passes vertically upward through the gap (18) and then enters the semi-forming hole of the preforming guide mechanism (21).

3. The on-orbit forming device for composite truss rods based on pultrusion forming according to claim 1, characterized in that, The main beam rolling mechanism (23) includes a motor mounting base (23-9), a rolling base (23-1), a rolling motor (23-10), a main beam pressing wheel (23-11), a rolling wheel (23-3), and a pressing force adjustment assembly. The motor mounting base (23-9) and the rolling base (23-1) are both fixed to the frame. The rolling motor (23-10) is fixed to the motor mounting base (23-9), and its output shaft extends into the rolling base (23-1). The main beam pressing wheel (23-10) is... 11) Fixed on the output shaft of the roller press motor (23-10), the roller press roller (23-3) is set on one side of the main beam pressing roller (23-11) and a first pressing gap (23-12) is formed between the two to allow the prepreg tape of the main beam to pass through. The pressing force adjustment components are respectively set on both sides of the roller press seat (23-1) to adjust the gap size of the first pressing gap (23-12). The wheel axle of the roller press roller (23-3) is fixed to the two sets of pressing force adjustment components respectively.

4. The on-orbit forming device for composite truss rods based on pultrusion forming according to claim 3, characterized in that, The clamping force adjustment assembly includes two guide rails (23-8) arranged opposite each other, a slider (23-6) movably arranged on the guide rails (23-8), a sliding connecting plate (23-4) connected between the two sliders (23-6), a rotating handle (23-7) passing through one end of the roller press seat (23-1), and a first clamping spring (23-5). One end of the first clamping spring (23-5) is fixed on the rotating handle (23-7), and the other end is locked on the side edge of the sliding connecting plate (23-4). The end of the first clamping spring (23-5) locked on the sliding connecting plate (23-4) is provided with a latch (23-2).

5. The on-orbit forming device for composite truss rods based on pultrusion forming according to claim 1, characterized in that, The inclined beam winding mechanism (3) includes an inclined beam base plate (31), a ring motion assembly (32) fixed on the inclined beam base plate (31), and an inclined beam feeding mechanism (33) fixed on the ring motion assembly (32) and rotating under the drive of the ring motion assembly (32). The inclined beam feeding mechanism (33) includes an inclined beam raw material support (33-1), an inclined beam raw material wheel (33-2) fixed horizontally in the inclined beam raw material support (33-1), and a connecting spring (33-3) connected to the inclined beam. The inclined beam roller bracket (33-4) is connected to the beam raw material bracket (33-1), and the inclined beam roller (33-5) is fixed in a horizontal position inside the inclined beam roller bracket (33-4). The inclined beam roller bracket (33-4) is set on the side of the inclined beam raw material bracket (33-1) facing the main beam prepreg strip. The inclined beam prepreg strip is led out from the inclined beam raw material wheel (33-2), goes around to the outside of the inclined beam raw material bracket (33-1), and then goes around the inclined beam roller (33-5) and then wraps around the main beam prepreg strip.

6. The on-orbit forming device for composite truss rods based on pultrusion forming according to claim 5, characterized in that, The ring motion assembly (32) includes an annular guide rail (32-1) and rotating wheels (32-2) fixed on the upper surface of the inclined beam base plate (31), a winding motor (32-3) fixed on the lower surface of the inclined beam base plate (31), and a drive gear (32-4). The output axis of the winding motor (32-3) passes through the inclined beam base plate (31) and is fixed to the drive gear (32-4). The drive gear (32-4) meshes with the annular guide rail (32-1). Multiple rotating wheels (32-2) are arranged on the outer circumference of the annular guide rail (32-1) and the two are rotatably connected. The upper inclined beam winding mechanism (3) is provided with a set of inclined beam feeding mechanisms (33), and the lower inclined beam winding mechanism (3) is provided with two sets of inclined beam feeding mechanisms (33).

7. The on-orbit forming device for composite truss rods based on pultrusion forming according to claim 1, characterized in that, The welding and guiding mechanism (4) includes an external guide wheel assembly and an inner liner assembly. Multiple sets of external guide wheel assemblies are provided. The multiple sets of external guide wheel assemblies are evenly distributed in the circumferential direction and their arrangement positions correspond to the arrangement positions of the main beam rolling mechanism (23). Each set of external guide wheel assemblies has a welding tool (47) on one side for welding and fixing the cross node between the main beam prepreg strip and the inclined beam prepreg strip to form a truss (5). The inner lining assembly includes an inner lining core (44), which extends vertically downward from the center of the frame into the frame and its bottom is fixed on the frame frame at the height of the main beam roller pressing mechanism (23). The inner lining core (44) is provided with an internal pressing wheel (43) and a follower wheel (41). The internal pressing wheel (43) is opposite to the external guide wheel assembly. The internal pressing wheel (43) and the follower wheel (41) are arranged in a one-to-one correspondence. The follower wheel (41) is located on the inner lining core (44) between the inclined beam winding mechanism (3) and the welding and guiding mechanism (4), and the wheel surface of the follower wheel (41) is completely fitted with the shape of the main beam prepreg tape to maintain the configuration of the supporting truss (5) and to transport the truss (5) upward.

8. The on-orbit forming device for composite truss rods based on pultrusion forming according to claim 7, characterized in that, The external guide wheel assembly includes a pressure wheel seat (42), an external spring pressure wheel (45), a pulley (46), and an adjusting rod (48). The external spring pressure wheel (45) is disposed inside the pressure wheel seat (42) and forms a second pressure gap (49) between it and the internal pressure wheel (43). One end of the axle of the external spring pressure wheel (45) is fixed to the pulley (46) disposed outside the pressure wheel seat (42). The adjusting rod (48) passes through the pressure wheel seat (42) and is fixed to the external spring pressure wheel (45) to adjust the size of the gap in the second pressure gap (49).

9. A method for preparing composite truss rods using the apparatus according to any one of claims 1-8, characterized in that, Specifically, the following steps are included: S1, the main beam prepreg tape of the main beam feeding mechanism (1) is sequentially conveyed upward to the preforming guide mechanism (21), the forming guide mechanism (22) and the main beam rolling mechanism (23). When the main beam prepreg tape passes through the preforming guide mechanism (21), the preforming guide mechanism (21) heats and plasticizes it to form a semi-formed state. When the semi-formed main beam prepreg tape passes through the forming guide mechanism (22), the forming guide mechanism (22) heats and plasticizes it to form a formed state. When the formed main beam prepreg tape passes through the first pressing seam (23-12) of the main beam rolling mechanism (23), the main beam rolling mechanism (23) cools and shapes it and rolls it upward. S2, when the formed main beam prepreg tape is conveyed upward to the inclined beam winding mechanism (3), the upper and lower inclined beam winding mechanisms (3) rotate left and right respectively under the drive of their respective winding motors (32-3), so that their respective inclined beam prepreg tapes are spirally wound on the main beam prepreg tape in different winding directions; S3, the main beam prepreg tape, which is wrapped with the inclined beam prepreg tape, continues to move upward under the transmission action of the follower wheel (41) and the main beam roller pressing mechanism (23). When the main beam prepreg tape, which is wrapped with the inclined beam prepreg tape, passes through the second pressing seam (49), the welding tool (47) welds and fixes the intersection between the main beam prepreg tape and the inclined beam prepreg tape to form a one-dimensional composite truss structure. S4. Repeat the pultrusion molding process of the one-dimensional composite truss structure described above until the fabrication of the one-dimensional composite truss structure of the designed length is completed.

Images