Automatic weaving device and weaving method for cobweb-like fiber preform

Abstract

The invention provides an automatic weaving device and method for a cobweb-like fiber preform. The automatic weaving device comprises a rack, and a radial weaving assembly is installed at the top of the rack; the radial knitting assembly comprises a cam assembly, the cam assembly is connected with a driving assembly, and the cam assembly is movably connected with a radial shuttle forward push rod and a radial shuttle reverse push rod; a radial shuttle support disc is arranged on the rack, radial shuttles are connected to the top ends of the radial shuttle forward push rod and the radial shuttle reverse push rod, the radial shuttles are installed on the top of the radial shuttle support disc, and radial thread deconcentrators are installed on the sides of the radial shuttles; a circumferential knitting assembly is arranged in the cam assembly, the circumferential knitting assembly comprises a yarn fixing flange plate, circumferential fixing supports are symmetrically arranged on the yarn fixing flange plate, circumferential shuttles are connected to the circumferential fixing supports through sliding pieces, and coil frames are arranged on the circumferential fixing supports; a tensioning assembly is arranged on the outer side of the radial shuttle support disc on the rack. The knitting device replaces manual work to efficiently complete knitting of the knitted fabric.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of fiber weaving, in particular to an automatic weaving device and method for a spider-web-like fiber preform. BACKGROUND

[0002] With the increasing maturity of fiber weaving technology, fiber fabrics are increasingly widely used in products such as aircraft, rockets, trains, cars, and ships, and therefore higher requirements are put forward for the weaving quality and mechanical properties of fiber woven products. As a commonly used weaving method, orthogonal warp-weft weaving is particularly suitable for weaving conditions that do not have high requirements for mechanical properties and do not have specific requirements for weaving shapes. However, in fiber-reinforced composites that have high requirements for mechanical properties and directionality, the fiber direction of the traditional orthogonal warp-weft woven preform is not consistent with the bearing direction. Since the mechanical properties directly affect the strength and fatigue life of the product, the performance of the preform obtained by weaving also has obvious differences. For central-symmetrical-shaped fiber-reinforced composite structures such as circles and cones, spiral-radial fiber weaving preforms that resemble spider webs are suitable.

[0003] Due to the particularity of the spiral-radial fiber fabric weaving process, manual weaving is currently mainly used. In the manual weaving process, a special circular weaving tool is used to fix the radial yarns on the radial fixing clamps of the circular weaving tool one by one, the adjacent two radial yarns are arranged alternately up and down, and then a circumferential yarn is wound around the middle staggered position. After one winding is completed, the up and down positions of the adjacent two radial yarns in the fixed radial yarns are switched, that is, the radial yarn on the first layer is fixed to the lower position before winding the second layer, and the radial yarn on the first layer is fixed to the upper position before winding the second layer. After fixing, the second layer of circumferential yarn is wound. In this way, the radial yarns are arranged alternately up and down, and the circumferential yarns are wound around the circumference. Although manual weaving can complete the weaving of spiral-radial fiber fabrics, it takes a long time to complete one spiral-radial fiber fabric by manual weaving, resulting in low weaving efficiency and high work intensity of the weavers. At the same time, due to the difference in manual skills of the weavers during the weaving process, the tightness of the yarns in the spiral-radial fiber fabric woven is inconsistent. Although some existing weaving devices have been proposed, the corresponding weaving devices need the assistance of workers during use, which increases the work intensity of the weavers. SUMMARY

[0004] In order to solve the problems of low efficiency of manual weaving of spiral-radial fiber fabrics, inconsistent tightness of yarns in the woven fabric, and the need for workers to assist in the existing weaving devices, the present application provides an automatic weaving device and method for a spider-web-like fiber preform.

[0005] To achieve the above objectives, the present invention provides the following technical solution: This invention proposes an automatic weaving device for a spider web-like fiber preform, comprising a frame, wherein a radial weaving assembly is mounted on the top of the frame; The radial knitting assembly includes a cam assembly rotatably mounted within the frame, a drive assembly connected to the cam assembly, and a radial shuttle forward push rod and a radial shuttle reverse push rod movably connected to the cam assembly. The radial shuttle forward push rod and the radial shuttle reverse push rod are spaced apart and move in opposite directions. A radial shuttle support plate is provided on the frame above the cam assembly. A radial shuttle is connected to the top end of both the radial shuttle forward push rod and the radial shuttle reverse push rod. One end of the radial shuttle is rotatably mounted on the end face of the top of the radial shuttle support plate. A radial line divider is installed on the side of the radial shuttle. A circumferential weaving assembly is provided above the radial shuttle within the cam assembly. The circumferential weaving assembly includes a yarn fixing flange provided on the top of the drive assembly. A circumferential fixing bracket is symmetrically provided on the yarn fixing flange. A circumferential shuttle is connected to the circumferential fixing bracket via a sliding member. A coil frame is provided on the circumferential fixing bracket. A tensioning assembly is provided on the frame outside the radial shuttle support plate.

[0006] Preferably, the cam assembly includes a connecting seat installed in the frame, an inner cam and an outer cam are installed in the connecting seat, the inner cam is embedded in the outer cam, and the wave crest phase difference between the inner cam and the outer cam is 12°; The outer cam is connected to the radial shuttle reverse push rod, and the inner cam is connected to the radial shuttle forward push rod.

[0007] Preferably, the sliding member includes a transmission screw, which is rotatably mounted in a guide rail groove arranged along the length direction of the circumferential fixed bracket. A circumferential shuttle slide is installed in the guide rail groove, a circumferential shuttle bracket is connected to the circumferential shuttle slide, the circumferential shuttle is mounted on the circumferential shuttle bracket, the circumferential shuttle slide is spun onto the transmission screw, and a linear motor is connected to the end of the transmission screw away from the yarn fixing flange.

[0008] Preferably, the tensioning assembly includes a tensioning base fixed to the frame, and the tensioning base corresponds one-to-one with the radial shuttle; A rotating shaft is rotatably mounted on the tensioning base, a tensioning rod is connected to the rotating shaft, a tensioning spring is connected between the tensioning rod and the rotating shaft, and a transmission component is connected to one end of the rotating shaft.

[0009] Preferably, the transmission component includes a rotary motor and a torque sensor, the torque sensor being electrically connected to the rotary motor, and the output shaft of the rotary motor being connected to the rotary shaft.

[0010] Preferably, the drive assembly includes a central power shaft vertically mounted in the frame, a drive component connected to the bottom end of the central power shaft, and a transmission flange connected to the top end of the central power shaft, the transmission flange being installed inside the yarn fixing flange. An internal gear ring is fitted on the central power shaft, and a planetary gear is provided between the internal gear ring and the central power shaft. A cam frame is fixedly connected to the outside of the internal gear ring, and the cam frame is connected to the cam assembly.

[0011] Preferably, an inner cam rotation support frame is provided between the inner cam and the central power shaft.

[0012] Preferably, the drive component includes a motor mounted on a frame, and pulleys are respectively provided on the output shaft of the motor and the central power shaft, with a multi-ribbed belt connecting the two pulleys.

[0013] Preferably, a laser detector is provided on the frame, and the laser detector is communicatively connected to the motor.

[0014] This invention proposes an automatic weaving method for a spider web-like fiber preform, utilizing the aforementioned automatic weaving device for a spider web-like fiber preform, comprising: The radial yarn is passed through the tensioning assembly, the radial shuttle, and the radial shuttle splitter in sequence and fixed to the yarn fixing flange. A circumferential yarn loop is installed on the loop frame, and a yarn is led out from the circumferential yarn loop, wound around the circumferential shuttle, and fixed to the yarn fixing flange. Adjust the drive assembly to pre-operate at a low speed to confirm that the circumferential weaving assembly and cam assembly are installed at a preset rotation, and that there is no interference between the circumferential yarn loops and the radial yarns in the direction of movement; After confirming normal operation at low speed, adjust the speed of the drive component to complete the weaving process.

[0015] Compared with the prior art, the present invention has the following beneficial technical effects: This invention proposes an automatic weaving device for a spiderweb-like fiber preform. In this device, weaving is performed through the automated collaboration of radial and circumferential weaving components. Specifically, a cam assembly drives multiple radial shuttles to synchronously and reciprocate, completing the parallel automatic laying of multiple radial yarns. The circumferential shuttles, driven by the drive assembly, perform continuous circular motion, automatically interlacing the circumferential yarns. Both achieve high-speed, continuous mass production, completely replacing manual weaving, improving weaving efficiency, and reducing weaving costs. Furthermore, during the weaving process, workers do not need to monitor the weaving process; they only need to thread the yarn at the beginning and remove the woven fabric at the end, reducing the workload of workers and preventing poor quality woven fabrics due to worker errors.

[0016] Furthermore, in this weaving device, all radial shuttles are driven by a single cam assembly, with their motion trajectory and displacement being completely consistent, ensuring uniform laying of the radial yarns. The cam assembly and the circumferential shuttles are provided with rotational power through the same drive assembly, ensuring uniform laying of all yarns during the weaving process and improving the quality of the woven fabric. At the same time, a tensioning assembly is installed on the frame to tension each radial yarn, eliminating the uneven yarn tension caused by differences in manual operation feel, resulting in a uniform woven fabric structure, consistent internal stress, stable product quality, and high repeatability. Attached Figure Description

[0017] Figure 1 This invention provides a three-dimensional structural schematic diagram of an automatic weaving device for a spider web-like fiber preform. Figure 2 A top view schematic diagram of an automatic weaving device for a spider web-like fiber preform provided by the present invention; Figure 3 This is a schematic diagram of the structure of a circumferential weaving component in an automatic weaving device for a spider web-like fiber preform, provided by the present invention. Figure 4 This is a schematic diagram of another embodiment of the circumferential weaving component in the automatic weaving device for a spider web-like fiber preform provided by the present invention. Figure 5 This invention provides a schematic diagram of the tensioning component in an automatic weaving device for a spider web-like fiber preform. Figure 6 This invention provides a schematic diagram showing the connection between the inner cam, the radial shuttle forward push rod, and the radial shuttle support plate in an automatic weaving device for a spider web-like fiber preform. Figure 7 This invention provides a schematic diagram showing the connection between the outer cam, the radial shuttle reverse push rod, and the radial shuttle support plate in an automatic weaving device for a spider web-like fiber preform. Figure 8This invention provides a schematic diagram of the connection between the inner cam and the radial shuttle forward push rod in an automatic weaving device for a spider web-like fiber preform. Figure 9 This invention provides a schematic diagram of the connection between the outer cam and the radial shuttle reverse push rod in an automatic weaving device for a spider web-like fiber preform. Figure 10 This invention provides a cross-sectional schematic diagram of an automatic weaving device for a spider web-like fiber preform. Figure 11 for Figure 10 Enlarged view of point A in the middle; Figure 12 for Figure 10 Enlarged view of point B in the middle; Figure 13 for Figure 10 Enlarged view of point C in the middle; Figure 14 This invention provides a schematic diagram of the connection of the drive component in an automatic weaving device for a spider web-like fiber preform; Figure 15 This invention provides a schematic diagram of the structure of the outer cam rotating support frame in an automatic weaving device for a spider web-like fiber preform. Figure 16 This invention provides a schematic diagram of the structure of the inner cam in an automatic weaving device for a spider web-like fiber preform; Figure 17 This invention provides a schematic diagram of the structure of the inner cam in an automatic weaving device for a spider web-like fiber preform; Figure 18 This invention provides a schematic diagram of the cam frame structure in an automatic weaving device for a spider web-like fiber preform. Figure 19 This invention provides a schematic diagram of the wave crest phase difference between the inner and outer cams in an automatic weaving device for a spider web-like fiber preform. In the attached diagram: 1. Radial knitting assembly; 2. Circumferential knitting assembly; 3. Drive assembly; 4. Tensioning assembly; 5. Frame; 6. Radial shuttle; 7. Wire separator; 8. Radial shuttle forward push rod; 9. Radial shuttle reverse push rod; 10. Radial shuttle fixing rod; 11. Inner cam; 12. Outer cam; 13. Drive flange; 14. Circumferential shuttle; 15. Circumferential shuttle slide; 16. Drive screw; 17. Coil holder; 18. Linear motor; 19. Guide rail groove; 20. Circumferential fixed bracket; 21. Coupling; 22. Circumferential... 23. Shuttle support; 24. Yarn fixing flange; 25. Central power shaft; 26. Motor; 27. Pulley; 28. Multi-ribbed belt; 29. ​​Cam frame; 30. Shaft end cover; 31. Planetary gear; 32. Inner cam rotating support frame; 33. Internal gear ring; 34. Tensioning base; 35. Torque sensor; 36. Tensioning spring; 37. Tensioning rod; 38. Base; 39. Square steel bracket; 40. Cam fixing ring; 41. Central fixing disc; 42. Radial shuttle support disc; 43. Working bracket; 44. Movable locking pin. Detailed Implementation

[0018] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0019] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0020] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0021] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0022] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

[0023] With the increasing maturity of fiber weaving technology, fiber fabrics are being used more and more widely in products such as aircraft, rockets, trains, automobiles, and ships, placing higher demands on the weaving quality and mechanical properties of fiber-woven products. Orthogonal warp and weft weaving, as a commonly used weaving method, is particularly suitable for general working conditions where mechanical performance requirements are not high and there are no specific requirements for the weaving shape. However, in the field of fiber-reinforced composite materials, where mechanical performance and directionality requirements are high, the fiber direction of traditional orthogonal warp and weft woven preforms is inconsistent with the load-bearing direction, directly affecting the product's strength and fatigue life. For fiber-reinforced composite material structures with centrosymmetric shapes such as circles and cones, a spiderweb-like helical-radial fiber woven preform is suitable.

[0024] Due to the unique nature of the spiral-radial fiber fabric weaving process, specialized weaving machines are required. However, currently, the weaving of spiral-radial fiber fabrics in China is still primarily done manually, with few reports on automated weaving equipment. Manual weaving uses a specific circular weaving fixture. First, the radial yarns are sequentially fixed onto radial fixing clips, with adjacent radial yarns staggered vertically. A round of circumferential yarn is then wound around the staggered point. After one round, the vertical positions of the adjacent fixed radial yarns are switched; that is, the radial yarn on top of the first round is fixed to the bottom before the second round, and vice versa. After fixing, the second round of circumferential yarn is wound. This achieves the goal of alternating vertical radial yarns and circular winding of the circumferential yarns. However, traditional manual operation is not only complex and inefficient, but also makes it difficult to precisely control the tension of the radial and circumferential yarns during production. Therefore, traditional hand weaving techniques are incompatible with the trend of modern intelligent manufacturing, and there is an urgent need to solve the problem of automatic spiral-radial fiber weaving technology for imitation spider web fabrics.

[0025] Patent CN5450700A discloses a turbine bladed disk preform and its fiber volume fraction process design method, using a circular carbon fiber preform. However, this patent only proposes specific process methods and does not involve how to achieve polar weaving of the circular carbon fiber matrix. Patent CN110143824 A discloses a residual stress-free homogeneous high-temperature resistant SiC... f The method for preparing a SiC turbine integral bladed disk utilizes polar-woven silicon carbide fiber cloth for hot pressing and stitching to obtain a turbine bladed disk preform; however, it does not address the weaving preparation of circular fiber preforms. Patent CN210002025U provides a tensioning device for a circular knitting weft machine, mainly concerning yarn tensioning during textile processing, but it does not propose an effective solution for the automated weaving design of circular preforms. Patent CN108866755A discloses a method and equipment for weaving polar coordinate circular fabrics. The equipment provided by this patent is suitable for simple manual production, but its production efficiency is slow, the quantity is small, and the entire production process cannot be automated.

[0026] Therefore, in order to improve the weaving efficiency of helical-radial fiber fabrics and the consistency of yarn tension in the woven fabric, this invention proposes an automatic weaving device for a spiderweb-like fiber preform, such as... Figures 1 to 19 As shown, it includes a frame 5, a base 37 is provided on the top end of the frame 5, and a radial braiding assembly 1 is installed on the upper end face of the base 37. The radial weaving assembly 1 includes multiple working supports 42 disposed on the upper end face of the base 37. The multiple working supports 42 are arranged circumferentially and at equal intervals around the center point of the frame 5. A radial shuttle support disk 41 is bolted to the top end face of the multiple working supports 42 near the outer end of the base 37. A central fixed disk 40 is bolted to the inner end of the multiple working supports 42. A cam assembly is mounted on the base 37 below the radial shuttle support disk 41. A drive assembly 3 is connected to the cam assembly. The drive assembly 3 drives the cam assembly to rotate, causing the radial shuttle support disk 41 to rotate. Radial weaving is performed; multiple radial shuttle forward push rods 8 and multiple radial shuttle reverse push rods 9 are movably connected to the cam assembly, wherein the multiple radial shuttle forward push rods 8 and multiple radial shuttle reverse push rods 9 are spaced apart, and the movement directions of adjacent radial shuttle forward push rods 8 and radial shuttle reverse push rods 9 are opposite; a radial shuttle 6 is connected to the top end of each radial shuttle forward push rod 8 and radial shuttle reverse push rod 9 by a movable locking pin 43, and a radial shuttle fixing rod 10 is fixedly connected to one end face of the radial shuttle 6. The end of the radial shuttle fixing rod 10 away from the radial shuttle 6 is rotatably mounted on the end face of the top of the radial shuttle support plate 41, and the radial shuttle... The fixing rod 10 causes the radial shuttle 6 to rotate a certain angle along the radial shuttle support plate 41. A warp splitter 7 is installed on the side of the radial shuttle 6 on the middle fixed disc 40, with each warp splitter 7 corresponding to one of the radial shuttles 6. A circumferential weaving assembly 2 is located above the radial shuttle 6 and the middle fixed disc 40 within the cam assembly. During operation, after some of the radial shuttles 6 rotate a certain angle, they are positioned above the circumferential weaving assembly 2. The circumferential weaving assembly 2 includes a yarn fixing flange 23 located on top of the drive assembly 3. The yarn fixing flange 23 is coaxially arranged with the radial shuttle support plate 41. Symmetrical circumferential fixing brackets 20 are arranged on the outer wall of the 23, with two circumferential fixing brackets 20 arranged in parallel. A circumferential shuttle 14 is connected to each circumferential fixing bracket 20 via a sliding member, and a coil frame 17 is mounted on each circumferential fixing bracket 20. A tensioning component 4 is located on the outer side of the radial shuttle support plate 41 on the frame 5. During operation, the drive component 3 simultaneously drives the radial weaving component 1 and the circumferential weaving component 2 to weave the radial and circumferential yarns into a woven fabric. Mechanical weaving replaces manual weaving, improving weaving efficiency, reducing weaving costs, and ensuring more even yarn distribution, thus improving the quality of the woven fabric. In this weaving device, the height of the yarn fixing flange 23 can be changed according to actual weaving needs. Figure 3 For fixing the yarn in a low position, flange 23. Figure 4 For fixing the yarn at a high position, use flange 23.

[0027] like Figure 1 , Figure 2 , Figure 6 ,Figure 7 , Figure 10 , Figure 17 , Figure 18 and Figure 19 As shown, the cam assembly includes a connecting seat rotatably mounted on a base 37. A cam fixing ring 39 is provided on the side of the connecting seat on the base 37 to stably fix the connecting seat on the base 37. An inner cam 11 and an outer cam 12 are connected to the upper end face of the connecting seat. The inner cam 11 is embedded in the outer cam 12, and a certain distance is reserved between the two. The phase difference between the crests of the inner cam 11 and the outer cam 12 is 12°. The outer cam 12 is connected to the radial shuttle reverse push rod 9, and the inner cam 11 is connected to the radial shuttle forward push rod 8. This allows the radial shuttle forward push rod 8 connected to the inner cam 11 and the radial shuttle reverse push rod 9 connected to the outer cam 12 to generate a staggered reciprocating motion, thereby efficiently and synchronously completing the laying of the radial yarn and ensuring the coordination and stability of the weaving process.

[0028] like Figure 3 and Figure 4 As shown, the sliding component includes a transmission screw 16, which is rotatably mounted in a guide rail groove 19 arranged along the length direction of the circumferential fixed bracket 20. A circumferential shuttle slide 15 is installed in the guide rail groove 19, and a circumferential shuttle bracket 22 is connected to the circumferential shuttle slide 15. A circumferential shuttle 14 is installed on the circumferential shuttle bracket 22. The circumferential shuttle slide 15 is screwed onto the transmission screw 16. A coupling 21 is connected to the end of the transmission screw 16 away from the yarn fixing flange 23. The coupling 21 is connected to a linear motor 18. The linear motor 18 drives the transmission screw 16 to rotate through the coupling 21. During the rotation of the transmission screw 16, the threaded engagement causes the circumferential shuttle slide 15 to move along the guide rail groove 19, thereby realizing the movement of the circumferential shuttle 14 along the length direction of the circumferential fixed bracket 20.

[0029] like Figure 1 , Figure 2 and Figure 5 As shown, the tensioning assembly 4 includes a tensioning base 33 fixed to the upper end face of the base 37 on the frame 5, and the tensioning base 33 corresponds one-to-one with the radial shuttle 6; a rotating shaft is rotatably mounted on the tensioning base 33, a tensioning rod 36 is connected to the rotating shaft, a tensioning spring 35 is connected between the tensioning rod 36 and the rotating shaft, and a transmission component is connected to one end of the rotating shaft; the transmission component includes a rotating motor and a torque sensor 34, the torque sensor 34 is electrically connected to the rotating motor, and the output shaft of the rotating motor is connected to the rotating shaft. When tensioning is required, the torque sensor 34 receives the torque change, and controls the rotating motor to rotate, causing the tensioning rod 36 to rotate, thereby realizing radial line tension adjustment.

[0030] like Figure 1 , Figure 10 and Figure 14As shown, the drive assembly 3 includes a central power shaft 24 vertically mounted within the frame 5. A drive component is connected to the bottom end of the central power shaft 24, and a transmission flange 13 is connected to the top end of the central power shaft 24. The transmission flange 13 is installed within the yarn fixing flange 23. During the rotation of the central power shaft 24, the transmission flange 13 rotates synchronously, thereby driving the circumferential knitting assembly 2 to rotate circumferentially within the frame 5. The drive component includes a motor 25 mounted on the frame 5, and the output shaft of the motor 25 and the central power shaft 24 are respectively equipped with... There are pulleys 26, and a multi-wedge belt 27 is connected between the two pulleys 26. The motor 25 is a GH type three-phase motor. An internal gear ring 32 is fitted on the central power shaft 24. A planetary gear 30 is provided between the internal gear ring 32 and the central power shaft 24. A shaft end cover 29 is provided on the end of the internal gear ring 32. A cam frame 28 is fixedly connected to the outside of the internal gear ring 32. The cam frame 28 is connected to the bottom end of the connecting seat. The central power shaft 24 is fixed by the cam frame 28 and the shaft end cover 29, so that the central power shaft 24 is stably fixed in the frame 5. An inner cam rotation support frame 31 is provided between the inner cam 11 and the central power shaft 24. There are four inner cam rotation support frames 31. One end of each inner cam rotation support frame 31 is fixed on the inner cam 11 at its bottom end face. A support plate is vertically provided on the other end of the inner cam rotation support frame 31. The four support plates are spliced ​​together to form a circular sleeve, which is fitted on the central power shaft 24 to support the inner cam 11, thereby ensuring the stability of the inner cam 11 during rotation.

[0031] Preferably, a laser detector is provided on the base 37 at the top end of the frame 5. The laser detector is communicatively connected to the motor 25. During the weaving process, when the laser detector detects that the outer diameter of the woven fabric reaches 200mm, the laser detector sends a signal to the motor 25, and the motor 25 stops working to complete the weaving. After the machine has come to a complete stop, the woven fabric is removed, and the thread supply equipment starts working to supply thread for the second time.

[0032] Preferably, the frame 5 is assembled from multiple square steel supports 38.

[0033] This invention proposes an automatic weaving method for a spider web-like fiber preform, utilizing the aforementioned automatic weaving device for a spider web-like fiber preform, comprising: The radial yarn is passed through the tensioning assembly 4, the radial shuttle 6, and the radial yarn distributor 7 in sequence and fixed to the yarn fixing flange 23. The circumferential yarn loop is installed on the loop frame 17, and a yarn is led out from the circumferential yarn loop, wound around the circumferential shuttle 14, and fixed to the yarn fixing flange 23. Adjust the drive assembly 3 to pre-operate at low speed to confirm that the circumferential weaving assembly 2 and the cam assembly are installed at the preset rotation, and that there is no interference between the circumferential yarn loops and the radial yarns in the direction of movement; After confirming normal operation at low speed, adjust the speed of drive component 3 to complete the weaving process.

[0034] The following explanation, in conjunction with specific embodiments, further clarifies the situation; The production process involves creating a circular, spiderweb-like carbon fiber preform with a central aperture of 120mm and an outer diameter of 200mm. This preform is made using T700-3K carbon fiber bundles for plain weave, with a planar weave density of 20×20 or higher.

[0035] Determine that the center hole size of the circular base to be woven is 120mm, the radial yarn count is 70, and install the corresponding low-position circumferential shuttle bracket and low-position yarn fixing flange. The yarn is passed through the lead-in groove on the equipment base 37 by the yarn feeder, through the ring set on the tension rod 36, and through the radial shuttle 6 and the warp yarn distributor 7, and fixed to the round hole position on the yarn fixing flange 23; after the radial yarn is fixed, the circumferential yarn is looped to the designated position on the circumferential installation coil frame 17, the yarn breakage detection device is turned on, the yarn feeder is put into the pre-working state, and the weaving completion laser detection device is turned on; A thread is drawn from the circumferential yarn loop and wound around the circumferential shuttle 14, then fixed to the thread fixing flange 23; the motor 25 is adjusted to pre-work at low speed to confirm that the circumferential weaving assembly 2, the inner cam 11 and the outer cam 12 rotate with a preset phase difference, and there is no interference between the circumferential yarn loop and the radial yarn in the direction of movement; if there is, the position of the relevant components needs to be adjusted. During low-speed operation, check whether the wire breakage detection equipment is working properly and whether the laser detection equipment receives a detection signal after the weaving is completed. After confirming that all detection equipment and the weaving equipment are working properly during low-speed operation, adjust motor 25 to increase the speed. When the laser detection equipment detects that the outer diameter reaches 200mm after weaving is completed, it transmits a signal to motor 25, and motor 25 stops working to complete the weaving. After the machine has come to a complete stop, remove the woven material, and the wire supply equipment starts working to supply the second batch of wire.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the scope of the invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0037] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is only for illustrating the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made based on the technical concept proposed in this invention shall fall within the scope of protection of the claims of this invention.

Claims

1. An automatic weaving device for a spider web-like fiber preform, characterized in that, Includes a frame (5), on the top of which a radial braiding assembly (1) is mounted; The radial knitting assembly (1) includes a cam assembly rotatably mounted in the frame (5), a drive assembly (3) connected to the cam assembly, and a radial shuttle forward push rod (8) and a radial shuttle reverse push rod (9) movably connected to the cam assembly. The radial shuttle forward push rod (8) and the radial shuttle reverse push rod (9) are spaced apart, and the radial shuttle forward push rod (8) and the radial shuttle reverse push rod (9) move in opposite directions. A radial shuttle support plate (41) is provided on the frame (5) above the cam assembly. A radial shuttle (6) is connected to the top end of both the radial shuttle forward push rod (8) and the radial shuttle reverse push rod (9). One end of the radial shuttle (6) is rotatably mounted on the end face of the top of the radial shuttle support plate (41). A radial wire divider (7) is installed on the side of the radial shuttle (6). A circumferential weaving assembly (2) is provided above the radial shuttle (6) inside the cam assembly. The circumferential weaving assembly (2) includes a yarn fixing flange (23) provided on the top of the drive assembly (3). A circumferential fixing bracket (20) is symmetrically provided on the yarn fixing flange (23). A circumferential shuttle (14) is connected to the circumferential fixing bracket (20) through a sliding member. A coil frame (17) is provided on the circumferential fixing bracket (20). A tensioning assembly (4) is provided on the frame (5) on the outside of the radial shuttle support plate (41).

2. The automatic weaving device for a spider web-like fiber preform according to claim 1, characterized in that, The cam assembly includes a connecting seat installed in the frame (5), and an inner cam (11) and an outer cam (12) are installed in the connecting seat. The inner cam (11) is embedded in the outer cam (12), and the wave crest phase difference between the inner cam (11) and the outer cam (12) is 12°. The outer cam (12) is connected to the radial shuttle reverse push rod (9), and the inner cam (11) is connected to the radial shuttle forward push rod (8).

3. The automatic weaving device for a spider web-like fiber preform according to claim 1, characterized in that, The sliding component includes a transmission screw (16), which is rotatably mounted in a guide rail groove (19) arranged along the length direction of the circumferential fixed bracket (20). A circumferential shuttle slide (15) is installed in the guide rail groove (19). A circumferential shuttle bracket (22) is connected to the circumferential shuttle slide (15). A circumferential shuttle (14) is installed on the circumferential shuttle bracket (22). The circumferential shuttle slide (15) is screwed onto the transmission screw (16). A linear motor (18) is connected to the end of the transmission screw (16) away from the yarn fixing flange (23).

4. The automatic weaving device for a spider web-like fiber preform according to claim 1, characterized in that, The tensioning assembly (4) includes a tensioning base (33) fixed on the frame (5), and the tensioning base (33) corresponds one-to-one with the radial shuttle (6); A rotating shaft is rotatably mounted on the tensioning base (33), a tensioning rod (36) is connected to the rotating shaft, a tensioning spring (35) is connected between the tensioning rod (36) and the rotating shaft, and a transmission component is connected to one end of the rotating shaft.

5. The automatic weaving device for a spider web-like fiber preform according to claim 4, characterized in that, The transmission component includes a rotary motor and a torque sensor (34), the torque sensor (34) being electrically connected to the rotary motor, and the output shaft of the rotary motor being connected to the rotary shaft.

6. The automatic weaving device for a spider web-like fiber preform according to claim 2, characterized in that, The drive assembly (3) includes a central power shaft (24) vertically installed in the frame (5), a drive component is connected to the bottom end of the central power shaft (24), and a transmission flange (13) is connected to the top end of the central power shaft (24). The transmission flange (13) is installed in the yarn fixing flange (23). An internal gear ring (32) is fitted on the central power shaft (24), and a planetary gear (30) is provided between the internal gear ring (32) and the central power shaft (24). A cam frame (28) is fixedly connected to the external of the internal gear ring (32), and the cam frame (28) is connected to the cam assembly.

7. The automatic weaving device for a spider web-like fiber preform according to claim 6, characterized in that, An inner cam rotation support frame (31) is provided between the inner cam (11) and the central power shaft (24).

8. The automatic weaving device for a spider web-like fiber preform according to claim 1, characterized in that, The drive unit includes a motor (25) mounted on a frame (5), and pulleys (26) are respectively provided on the output shaft of the motor (25) and the central power shaft (24), and a multi-wedge belt (27) is connected between the two pulleys (26).

9. The automatic weaving device for a spider web-like fiber preform according to claim 8, characterized in that, A laser detector is provided on the frame (5), and the laser detector is communicatively connected to the motor (25).

10. An automatic weaving method for a spiderweb-like fiber preform, utilizing the automatic weaving device for a spiderweb-like fiber preform as described in any one of claims 1 to 9, characterized in that, include: The radial yarn is passed through the tensioning assembly (4), the radial shuttle (6), and the radial shuttle splitter (7) in sequence and fixed to the yarn fixing flange (23). A circumferential yarn loop is installed on the loop frame (17), and a yarn is led out from the circumferential yarn loop and wound around the circumferential shuttle (14) and then fixed to the yarn fixing flange (23). Adjust the drive assembly (3) to pre-work at low speed to confirm that the circumferential weaving assembly (2) and the cam assembly are installed at the preset rotation, and that there is no interference between the circumferential yarn loops and the radial yarns in the direction of motion; After confirming that the low-speed operation is normal, adjust the speed of the drive component (3) to complete the weaving.

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