Curved needling mechanism and three-dimensional needling device comprising same

Abstract

The application discloses a curved surface needling mechanism and a three-dimensional needling device containing the same. The curved surface needling mechanism can automatically needling and reinforce the curved surface, so that the automation of the fiber composite material preform curved surface part needling and reinforcement can be realized, the overall automation degree and processing efficiency of the fiber composite material preform processing are improved, the consistency and reliability of the product can be effectively ensured, and the technical problems of poor consistency and reliability and low processing efficiency caused by manual needling and reinforcement of the fiber composite material preform curved surface part in the prior art are solved. Meanwhile, the three-dimensional needling device is also provided with an automatic feeding mechanism and an automatic cutting mechanism, automatic feeding is realized, and the shape of the target fiber composite material preform can be automatically cut, so that the automation degree of the whole preform manufacturing is improved, the production efficiency is improved, and the risk of personnel injury is reduced.

Description

Technical Field

[0001] This invention relates to the field of acupuncture technology, and in particular to a curved surface acupuncture mechanism and a three-dimensional acupuncture device containing the same. Background Technology

[0002] Needle punching is a common nonwoven reinforcement process. It involves repeatedly punching objects such as fiber webs, felts, or fabrics with barbs, causing entanglement between fibers. This entanglement of fibers or fiber layers creates a specific structure and properties, thereby enhancing overall strength. Needle-reinforced nonwoven materials are widely used in industries such as manufacturing, aerospace, new energy, and construction.

[0003] The existing processing of nonwoven fiber composite preforms uses planar needle punching. However, with the increasing demand for industrial applications, there is a growing need to process fiber composite preforms with curved surfaces, and planar needle punching reinforcement can no longer meet production requirements.

[0004] For example, such as Figure 1 The crucible shown in the Czochralski process for producing single-crystal silicon includes a first circumferential surface 11, a first end surface 12, and a first arcuate surface 13 connecting the first circumferential surface 11 and the end surface 12; as shown Figure 2 The nose cone, a key component in the aerospace field, shown includes a second circumferential surface 21 and a conical surface 22; as shown... Figure 3 The prefabricated body shown includes a third circumferential surface 31, a second end surface 32 located at both ends of the third circumferential surface 31, and a second arcuate surface 33 connecting the third circumferential surface 31 and the second end surface 32. The first arcuate surface 13, the conical surface 22 and the second arcuate surface 33 are all curved surfaces, and none of them can be independently needled and reinforced using traditional planar needled methods.

[0005] Currently, the needle reinforcement of existing fiber composite preforms with curved surfaces is accomplished by a combination of mechanical and manual methods. The planar needle is used to complete the needle reinforcement of the circumferential or planar parts, while the curved parts are needled and reinforced manually by workers. This processing method not only makes continuous needle reinforcement impossible, but also makes it difficult to determine the consistency and reliability of the needle reinforcement. In addition, it requires a large number of workers and has low processing efficiency.

[0006] Therefore, the above-mentioned prior art has at least the following technical problems: the curved part of the fiber composite preform is reinforced by manual needle punching, resulting in poor product consistency and reliability, and low processing efficiency. Summary of the Invention

[0007] This application provides a curved surface needle punching mechanism and a three-dimensional needle punching device containing the same, which solves the technical problem in the prior art that the curved surface part of the fiber composite preform is reinforced by manual needle punching, resulting in poor product consistency and reliability, and low processing efficiency.

[0008] To address the aforementioned technical problems, in a first aspect, embodiments of this application provide a curved surface needle-punching mechanism, comprising:

[0009] At least two adaptive needle plates arranged side by side, wherein the front of the adaptive needle plate is provided with a needle;

[0010] The first driving device has a drive shaft that is connected to the back of the adaptive needle plate in a one-to-one correspondence, and is used to drive the adaptive needle plate to move back and forth, so as to adjust the radius of curvature of the curved surface formed by the front end of the needle on each of the adaptive needle plates.

[0011] A guide rail is connected to the first driving device; in a first state, each of the first driving devices can move axially on the guide rail; in a second state, each of the first driving devices is fixed on the guide rail and cannot move.

[0012] The second driving device, with its drive shaft connected to the guide rail, is used in the second state to drive the guide rail and its adaptive needle plate to move back and forth, so as to drive the needle to pierce or withdraw from the curved surface to be needled and reinforced.

[0013] Furthermore, the guide rail is an electromagnet-type guide rail, and an electromagnet is installed inside the electromagnet-type guide rail. The housing of the first driving device is made of a metal that can be attracted by a magnet.

[0014] In the first state, the electromagnet-type guide rail is not energized, and each of the first driving devices can move axially on the electromagnet-type guide rail;

[0015] In the second state, the electromagnet-type guide rail is energized to generate an electromagnetic attraction force, which attracts each of the first driving devices. At this time, the position of each of the first driving devices on the electromagnet-type guide rail is fixed and cannot be moved.

[0016] Furthermore, the adaptive needle plate is equipped with a strain gauge pressure sensor for detecting the reaction force of the curved surface to be needled and reinforced.

[0017] In the first state, the corresponding adaptive needle plate is driven forward by the first driving device to gradually approach the curved surface to be needled and reinforced; when the pressure signal detected by the strain gauge pressure sensor reaches the set threshold, the position of the drive shaft of the corresponding first driving device is locked; when the pressure signals detected by all strain gauge pressure sensors reach the set threshold, the electromagnet-type guide rail is energized, which is the second state.

[0018] Specifically, the curved surface needle piercing mechanism also includes a controller. The signal input terminal of the controller is connected to the strain gauge pressure sensor to receive the pressure signal acquired by the strain gauge pressure sensor. The signal output terminal of the controller is connected to both the first driving device and the limiting device. The controller can identify whether the angle of the corresponding adaptive needle plate is adapted to the curvature of the curved surface to be needle pierced and reinforced based on the pressure signal.

[0019] During the process of the first driving device driving the needles on the adaptive needle plate to needle the curved surface to be needled and reinforced to adapt to the slope of the curved surface to be needled, when the controller recognizes that any of the adaptive needle plates has adapted to the curvature of the curved surface to be needled and reinforced, the controller controls the corresponding first driving device to lock the relative distance between the adaptive needle plate and the curved surface to be needled and reinforced. When all the adaptive needle plates have adapted to the curvature of different parts of the curved surface to be needled and reinforced, and the overall adaptive needle plates are adapted to the curved surface to be needled and reinforced, the controller locks the limiting device of each of the first driving devices, thereby locking the relative position between each adaptive needle plate and the curved surface to be needled and reinforced.

[0020] Furthermore, adjacent adaptive needle plates are connected by hinges; and / or

[0021] The drive shaft of the first drive device is connected to the back of the adaptive needle plate via a hinge.

[0022] Furthermore, the second drive device is mounted on a direction adjustment device having one or more degrees of freedom adjustment functions.

[0023] Specifically, the first driving device is an electric cylinder / pneumatic cylinder, and the output rod of the electric cylinder is hinged to the back of the corresponding adaptive needle plate;

[0024] When the controller recognizes that any of the adaptive needle plates has adapted to the curvature of the surface to be needled and reinforced, the controller locks the length of the output rod of the electric cylinder, thereby locking the relative distance between the adaptive needle plate and the surface to be needled and reinforced.

[0025] Secondly, embodiments of this application also provide an acupuncture device, the device including the curved surface acupuncture mechanism described in any of the first aspects.

[0026] Furthermore, the device includes:

[0027] A frame, on which a core mold and a third drive device for driving the core mold to rotate are provided;

[0028] An automatic feeding mechanism is used to convey fiber material to the mandrel so that it can be wound onto the mandrel under the drive of the third driving device;

[0029] The curved needle punching mechanism as described in any of the first aspects is adjustable up, down, left, and right on the frame and is used to perform needle punching on the fiber material wound onto the curved surface of the core mold.

[0030] Furthermore, the automatic feeding mechanism includes a feeding bracket, on which a feeding plane for laying fiber material is formed. When the core mold rotates, it can drive the fiber material to be wound on the core mold.

[0031] Furthermore, the needle punching device also includes an automatic cutting mechanism for cutting the fiber material into a shape that can form the target preform during the feeding process.

[0032] Furthermore, the automatic cutting mechanism includes a gantry mounted on the feeding plane, through which fiber materials can pass, and a laser emitter that can move up, down, left, and right on the gantry, the laser emitted by the laser emitter being able to cut the fiber materials.

[0033] The needle-punching device described in this application embodiment features a curved-surface needle-punching mechanism for fixing curved surfaces. This mechanism automates the needle-punching and fixing of curved parts of the fiber composite preform, improving the overall automation level and processing efficiency of the preform containing curved surfaces, and effectively ensuring product consistency and reliability. Furthermore, this application embodiment also includes an automatic feeding mechanism and an automatic cutting mechanism for automatically feeding the core mold and automatically cutting it into the shape required to form the target fiber composite preform. This improves the automation level of the entire preform manufacturing process, increases production efficiency, and reduces the risk of personnel injury. Attached Figure Description

[0034] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0035] Figure 1 This is a schematic diagram of the structure of a crucible in the prior art;

[0036] Figure 2 This is a schematic diagram of the nasal cone structure in the prior art;

[0037] Figure 3This is a schematic diagram of a fiber composite preform with curved surfaces at both ends in the prior art;

[0038] Figure 4 This is a schematic diagram of a three-dimensional needle-punching device for needle-punching and fixing a crucible preform according to an embodiment of the present invention;

[0039] Figure 5 for Figure 4 Side view;

[0040] Figure 6 for Figure 4 A schematic diagram of the middle section structure;

[0041] Figure 7 This is a schematic diagram of a curved surface needle-punching mechanism according to an embodiment of the present invention;

[0042] Figure 8 This is a partial structural diagram of a curved surface needle-punching mechanism in one embodiment of the present invention when the needle is not in contact with the curved surface to be needle-punched and reinforced.

[0043] Figure 9 This is a partial structural diagram of a curved surface needle-punching mechanism according to an embodiment of the present invention, when the needle has been attached to the curved surface to be needle-punched and reinforced.

[0044] Figure 10 This is a schematic diagram of the automatic cutting mechanism in one embodiment of the present invention;

[0045] Figure 11 This is a schematic diagram of the structure of the crucible preform after being cut from fiber material in one embodiment of the present invention;

[0046] Figure 12 This is a schematic diagram of a three-dimensional needle-punching device used for needle-punching and fixing a nasal cone preform in one embodiment of the present invention;

[0047] Figure 13 This is a side view of a three-dimensional needle-punching device used for needle-punching and fixing a fiber composite preform with curved surfaces at both ends, according to an embodiment of the present invention.

[0048] Figure 14 This is a schematic diagram of a three-dimensional needle-punching device used to needle-fix a fiber composite material preform with curved surfaces at both ends, according to an embodiment of the present invention. Detailed Implementation

[0049] This application provides a curved surface needle punching mechanism and a three-dimensional needle punching device containing the same, which solves the technical problem in the prior art that the curved surface part of the fiber composite preform is reinforced by manual needle punching, resulting in poor product consistency and reliability, and low processing efficiency.

[0050] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0051] like Figures 4-6 As shown, one or more embodiments of this application provide a three-dimensional needle punching device. The three-dimensional needle punching device includes a frame 100, on which a mounting platform 109 is provided. A core mold for processing a preform, such as a core mold for processing a crucible preform 210, is rotatably mounted on the mounting platform 109. The core mold rotates under the drive of a drive motor and winds fiber material 520 to form the crucible preform 210. The frame 100 is provided with a first planar needle punching mechanism 310 and a second planar needle punching mechanism 320 for needle punching and fixing the first circumferential surface 11 and the first end face 12 of the crucible preform 210, respectively. Both the first planar needle punching mechanism 310 and the second planar needle punching mechanism 320 are mature products in the prior art, and will not be described in detail here.

[0052] The frame 100 is also provided with a curved surface needle-punching mechanism 400 for needle-punching and reinforcing the curved surface portion (i.e., the first arc surface 13) of the crucible preform 210. The curved surface needle-punching mechanism 400 can realize the automation of needle-punching and fixing of the curved surface portion of the fiber composite preform, effectively solving the technical problem that the curved surface portion of the fiber composite preform is needle-punched and reinforced manually in the prior art, resulting in poor product consistency and reliability and low processing efficiency. It improves the overall automation level and processing efficiency of the processing of fiber composite preforms containing curved surfaces, and can effectively ensure product consistency and reliability.

[0053] like Figures 4-6 As shown, the curved surface needle punching mechanism 400 is mounted on the mounting platform 101, so as to... Figures 4-6 With the orientation of the three-dimensional acupuncture device in use as a reference, the frame 100 is provided with a first vertical guide rail 102 extending in the vertical direction and a first horizontal guide rail 103 extending in the length direction. The mounting platform 101 is slidably mounted on the first vertical guide rail 102. The two ends of the first vertical guide rail 102 are respectively fixed on the guide rail plate 104. The guide rail plate 104 is slidably mounted on the first horizontal guide rail 103 in the length direction.

[0054] The mounting platform 101 is provided with a first vertical lead screw 105 parallel to the first vertical guide rail 102, and the first vertical lead screw 105 meshes with the mounting platform 101. One end of the first vertical lead screw 105 is connected to a first motor 106, which is located on one of the guide rail plates 104. When the first motor 106 rotates forward or backward, it drives the first vertical lead screw 105 to rotate forward or backward, thereby driving the mounting platform 101 to move up and down and adjusting the vertical position of the mounting platform 101.

[0055] The upper and lower guide rail plates 104 are slidably mounted on the upper and lower first horizontal guide rails 103, respectively. The lower guide rail plate 104 is also provided with a first horizontal lead screw 107 parallel to the first horizontal guide rail 103, and the first horizontal lead screw 107 meshes with the guide rail plate 104. One end of the first horizontal lead screw 107 is connected to a second motor 108. When the second motor 108 rotates forward or backward, it drives the first horizontal lead screw 107 to rotate forward or backward, which can drive the guide rail plate 104 to move horizontally left and right. This allows the horizontal position of the mounting platform 101 to be adjusted. Combined with the aforementioned vertical position adjustment of the mounting platform 101, the position of the curved surface needle punching mechanism 400 set on the mounting platform 101 can be comprehensively adjusted, so that the curved surface needle punching mechanism 400 can match the curved surface position of different preforms.

[0056] In addition, the acupuncture device also includes a controller. The drive motor, the first motor 106 and the second motor 108 are respectively connected to the controller. The controller can control the opening, closing and rotation of the drive motor, the first motor 106 and the second motor 108.

[0057] like Figure 7 As shown, the curved surface needle punching mechanism 400 includes a head and a tail. The head includes a needle 409, and the tail is used to adjust the tilt angle of the needle 409 and drive the needle 409 to insert into or withdraw from the fiber material 520 for needle punching and fixing.

[0058] The tail section includes a first servo motor 401 mounted on the mounting platform 101. A second servo motor 402 is vertically connected to the shaft of the first servo motor 401. A cylinder 403 is connected to the shaft of the second servo motor 402. The output shaft of the cylinder 403 is connected to the head to drive the head forward or backward, thereby driving the needles 409 on the head to pierce or withdraw from the fiber material 520 for needle fixation. At the same time, the rotation of the shafts of the first servo motor 401 and the second servo motor 402 provides two-dimensional angle adjustment of the cylinder 403, thereby adjusting the tilt angle of the needles 409 to match surfaces with different curvatures.

[0059] Furthermore, the tail section includes two cylinders 403 arranged side by side, connected as a single unit by a fixing plate. The cylinders 403 are simultaneously connected to the second servo motor 402 via a fixed connection between the fixing plate and the shaft of the second servo motor 402. Additionally, the first servo motor 401 and the second servo motor 402 are respectively connected to a controller, which can control the opening, closing, and steering of the first servo motor 401 and the second servo motor 402. Furthermore, the cylinders 403 can also be hydraulic cylinders, electric cylinders, or other devices with the same function.

[0060] like Figures 7-9 As shown, the head includes a connecting plate 404, the rear end of the connecting plate 404 is provided with a cylinder connecting shaft 4041 that is fixedly connected to the output shafts of the two cylinders 403 respectively, and the front end of the connecting plate 404 is provided with an electromagnet-type guide rail 405.

[0061] The head includes at least two adaptive needle plates 408 arranged side by side. The front of the adaptive needle plate 408 is provided with the aforementioned needle 409. The back of the adaptive needle plate 408 is hinged to the output rod 407 of the electric cylinder 406, and the adaptive needle plate 408 corresponds to the electric cylinder 406 one by one.

[0062] The ends of each electric cylinder 406 are slidably mounted on an electromagnet-type guide rail 405. An electromagnet is installed inside the electromagnet-type guide rail 405, and the outer shell of each electric cylinder 406 is made of a metal that can be attracted by a magnet (such as iron, nickel, cobalt, or their alloys). When the electromagnet-type guide rail 405 is not energized, each electric cylinder 406 can slide on it. When the electromagnet-type guide rail 405 is energized, the electromagnet inside generates electromagnetic fields, attracting the electric cylinders 406. The greater the input power of the electromagnet-type guide rail 405, the greater the electromagnetic attraction force, thereby locking the axial position of each electric cylinder 406 on the electromagnet-type guide rail 405.

[0063] The output rod 407 of the electric cylinder 406 is hinged to the back of the corresponding adaptive needle plate 408, so the adaptive needle plate 408 can swing relative to the output rod 407 of the electric cylinder 406, and the included angle between the adaptive needle plate 408 and the output rod 407 of the electric cylinder 406 can be adjusted. At the same time, the adaptive needle plate 408 and the output rod 407 of the electric cylinder 406 can move back and forth synchronously. When the output rod 407 of the electric cylinder 406 extends or retracts, it can drive the needle 409 on the adaptive needle plate 408 to insert into or withdraw from the fiber material 520.

[0064] In addition, the two adjacent adaptive needle plates 408 are hinged together, so that the included angle between the adjacent needle plates 408 can be adjusted. Thus, each of the adaptive needle plates 408 can together form a shape that adapts to the curved surface to be needled and reinforced.

[0065] Each of the adaptive needle plates 408 is provided with a strain gauge pressure sensor 413 on its back side for detecting the reaction force of the fiber material 520 on the needle 409.

[0066] The signal input terminal of the controller is connected to the strain gauge pressure sensor 413 to receive the pressure signal acquired by the strain gauge pressure sensor 413. The controller has a pre-stored pressure threshold. The controller compares the pressure corresponding to the pressure signal with the pressure threshold. The signal output terminal of the controller outputs a control signal according to the comparison result. The control signal is used to control the power of the electromagnet guide rail 405 and control the corresponding electric cylinder 406, thereby locking or unlocking the axial position of the electric cylinder 406 on the electromagnet guide rail 405, and locking the length of the output rod 407 of the electric cylinder 406.

[0067] Specifically, when adjusting the curvature of the corresponding portion of the adaptive curved surface of the needles 409 on different adaptive needle plates 408, all electric cylinders 406 are activated. The output rods 407 of the electric cylinders 406 extend or retract, driving the needles 409 on the adaptive needle plates 408 to insert into or withdraw from the fiber material 520. During repeated needling, the needles 409 will adjust to an inclination angle adapted to the corresponding portion of the curved surface. When any needle 409 on any adaptive needle plate 408 is adapted to the corresponding portion of the curved surface, the reaction force of the curved surface on the adaptive needle plate 408 is the maximum, which is the pressure threshold. Therefore, this can be tested experimentally or simulated. The pressure threshold is calculated. When the pressure reaches the pressure threshold, the controller locks the length of the output rod 407 corresponding to the electric cylinder 406, thereby locking the relative distance between the adaptive needle plate 408 and the curved surface to be needled and reinforced. When all the adaptive needle plates 408 have adapted to the curvature of different parts of the curved surface to be needled and reinforced, the controller increases the power of the electromagnet guide rail 405, making the magnetism of the electromagnet stronger, thereby locking the axial position of each electric cylinder 406 on the electromagnet guide rail 405, and then locking the relative position between the adaptive needle plate 408 and the curved surface to be needled and reinforced.

[0068] Conversely, when the pressure is less than the pressure threshold, the controller does not lock the length of the output rod 407 of the electric cylinder 406, nor does it increase the power of the magnetic guide rail 405, thereby allowing the needle 409 to continue to puncture repeatedly, and allowing the electric cylinder 406 to slide axially on the electromagnet guide rail 405.

[0069] When all the adaptive needle plates 408 have adapted to the curvature of different parts of the surface to be needled and reinforced, the length of the output rod 407 of the electric cylinder 406 and the axial position of the electric cylinder 406 on the electromagnet guide rail 405 are locked by the controller. The relative angles between the corresponding adaptive needle plates 408 are fixed, and the whole structure forms a shape that adapts to the curved surface, such as... Figure 9 As shown.

[0070] It should be noted that the electric cylinder 406 is a miniature electric cylinder, which drives the needle head to slightly pierce the curved surface of the fiber composite preform. It is only used for initial adjustment. Once the adaptive needle plate 408 is adjusted to fit the curved surface, the cylinder 403 drives the needle 409 of the entire head to pierce or withdraw from the fiber material 520, completing the needle fixation of the curved surface. The electric cylinder 406 can also be a cylinder, hydraulic cylinder, crank rocker mechanism, or other device with the same function.

[0071] In summary, when adjusting the curved surface needle-punching mechanism 400 to adapt to the curved surface to be needle-punched and reinforced, firstly, the position of the curved surface needle-punching mechanism 400 is adjusted to a suitable position by controlling the first motor 106 and the second motor 108. Next, the curved surface needle-punching mechanism 400 is adjusted to a suitable tilt angle by controlling the first servo motor 401 and the second servo motor 402. Finally, the piercing surfaces of each needle 409 are shaped to conform to the curved surface, thus allowing them to fit snugly against the curved surface to be needle-punched and reinforced. Figure 9 As shown.

[0072] It should be noted that, as Figure 9 As shown, adjacent adaptive needle plates 408 are hinged together by a hinge 410. A connecting shaft 411 is provided on the back of the adaptive needle plate 408. The front end of the output rod 407 of the electric cylinder 406 is provided with a kit 412 that is rotatably sleeved on the connecting shaft 411.

[0073] In the existing production process of fiber composite preforms, the fiber material 520 is cut manually and then manually wound onto the mandrel. Automatic feeding and cutting are not possible, which is time-consuming, labor-intensive, and has low processing efficiency.

[0074] Therefore, in some embodiments of this application, an automatic feeding mechanism and an automatic cutting mechanism are provided on one side of the frame 100 to automatically feed the core mold (fiber material 520) and automatically cut it into a shape that can form the target fiber composite material preform.

[0075] like Figure 4 , 5As shown, the automatic feeding mechanism includes a feeding bracket 510 with a feeding plane. Fiber material 520 is laid on the feeding plane, and one end of the fiber material 520 is fixed to the mandrel (the fiber material 520 is fixed to the mandrel by manual needle punching to prevent the fiber material 520 from falling off). When the mandrel rotates forward, the fiber material 520 is wound on the mandrel. When the mandrel rotates backward, the fiber material 520 is unwound on the mandrel. In this way, automatic feeding can be formed.

[0076] like Figure 4 , 5 As shown in Figure 10, the automatic cutting mechanism includes a gantry 610 mounted on a feeding plane. The gantry 610 allows the fiber material 520 to pass through, and a laser emitter 621 is movably mounted on the gantry 610. The laser emitted by the laser emitter 621 cuts the fiber material 520. Thus, by controlling the path of the laser emitted by the laser emitter 621, combined with the movement of the fiber material 520 on the feeding plane (feeding or unloading), the fiber material 520 can be cut into the target shape.

[0077] Furthermore, the bottom end of the gantry 610 is fixed to the loading plane via a base 680. A laser support rail 630 extending along the width direction is horizontally provided on the gantry 610. The laser emitter 621 is slidably mounted on the laser support rail 630 via a laser mounting bracket 622. In this way, the horizontal position of the laser emitter 621 in the width direction can be adjusted.

[0078] The laser support rail 630 is fixed at both ends to the slide plate 640. The gantry 610 has vertically extending second vertical guide rails 650 on both sides. The slide plate 640 is slidably mounted on the second vertical guide rails 650. A second vertical screw 660, parallel to the second vertical guide rails 650, passes through the slide plate 640. The second vertical screw 660 meshes with the slide plate 640. A third motor 670 is connected to the bottom end of the second vertical screw 660. The forward and reverse rotation of the third motor 670 drives the second vertical screw 660 to rotate forward and reverse, thus driving the slide plate 640 to move up and down. This allows adjustment of the vertical position of the laser support rail 630, i.e., the vertical position of the laser emitter 621. Therefore, in summary, the horizontal position adjustment function of the laser emitter 621 can comprehensively adjust the position of the laser emitter 621, thereby adjusting the laser angle to meet cutting requirements.

[0079] Furthermore, such as Figure 10As shown, the two slide plates 640 are provided with a drive wheel and a driven wheel facing each other. The drive wheel is connected to a fourth motor. A chain 690 is tensioned between the drive wheel and the driven wheel. The chain 690 is fixedly connected to the back of the laser mounting bracket 622. When the fourth motor rotates forward and backward, it drives the chain 690 to rotate between the drive wheel and the driven wheel, thereby synchronously driving the laser emitter 621 to slide left and right along the laser bracket guide rail 630.

[0080] Taking the cutting of fiber material 520 of crucible preform 210 as an example, such as Figure 11 As shown, the width of the fiber material 520 is L, and one side of the fiber material 520 needs to be cut with a row of continuous serrations, where the tooth pitch is a and the tooth height is s, so that a crucible preform 210 with a circumferential surface height of d and an arc surface width of s = Ld can be formed.

[0081] Employing a single-pass cutting strategy, the maximum scanning speed V of the laser emitter 621 during a single cut is... max The calculation formula is (2-1):

[0082]

[0083] Where E represents the vaporization energy of fiber material 520, P represents the laser power, d is the laser beam diameter, and δ represents the thickness of fiber material 520. This indicates the volume content of fiber material 520.

[0084] Laser power and duty cycle F d The higher the duty cycle, the higher the laser power. Specifically, the duty cycle F of the laser output is... d The proportion of light emission time to total time is calculated using formula (2-2):

[0085]

[0086] Where pf is the laser pulse frequency and pw is the laser pulse width.

[0087] During the automatic cutting process, it is necessary to know the rotational speed n of the prefabricated rotating body, the time t0 for the prefabricated rotating body to complete one revolution, the initial radius r0 of the prefabricated rotating body, the increase of r* for each layer, and the linear velocity v of the rotating body v = 2π(r0 + r) / ... * The speed of the laser emitter is v. 激光 ,but

[0088]

[0089] Note that v 激光 The following conditions must also be met: v 激光 ≤V maxOtherwise, the laser emitter's speed would be too fast, causing it to be unable to cut through.

[0090] During the automatic feeding process, the initial section of the fiber material 520 is first manually fixed onto the crucible preform 210. Then, the drive motor is started, and the preform rotates at a speed of n, feeding the fiber material 520. The laser emitter 621 is fed from the edge of the laser support guide rail 630 at a speed of v. 激光 Move horizontally towards the center, the movement time t = s / v 激光 Then the laser emitter 621 reverses direction, moving from the middle of the laser support rail 630 at a speed v. 激光 Move horizontally towards the edge for a time of t, repeating this process until the fiber material 520 that fits the prefabricated rotating surface is cut out, thus completing the cutting of the fiber material 520.

[0091] Therefore, the automatic feeding mechanism and automatic cutting mechanism described in the embodiments of this application can automatically feed the core mold and automatically cut it into a shape that can form a preform, thereby improving the degree of automation and processing efficiency.

[0092] An exemplary method for processing crucible preforms using the aforementioned needle-punching device is as follows:

[0093] The position of the curved surface needle-punching mechanism 400 is adjusted to a suitable position relative to the curved surface to be needled by controlling the first motor 106 and the second motor 108, and the curved surface needle-punching mechanism 400 is adjusted to a suitable tilt angle relative to the curved surface to be needled by controlling the first servo motor 401 and the second servo motor 402.

[0094] The adaptive needle plates 408 are adjusted to adapt to the curvature of different parts of the surface to be needled and reinforced, and the length of the output rod 407 of the electric cylinder 406 is locked. When each adaptive needle plate 408 forms a shape that adapts to the surface to be needled and fixed, the axial position of each electric cylinder 406 on the electromagnet guide rail 405 is locked by the controller.

[0095] The fiber material 520 is laid on the feeding plane and one end of the fiber material 520 is fixed on the core mold. The fiber material 520 is cut into a shape that can form the target crucible preform by the automatic feeding mechanism and the automatic cutting mechanism.

[0096] The cylinder 403 is activated, driving the needle 409 of the entire head to pierce or withdraw from the fiber material 520, completing the needle fixation of the curved surface; at the same time, the first planar needle fixation mechanism 310 and the second planar needle fixation mechanism 320 are activated to needle fix the first circumferential surface 11 and the first end surface 12 of the crucible preform 210 respectively, completing the needle fixation of the entire crucible preform.

[0097] The needle-punching device described in this application embodiment can also be used for needle-punching and fixing other prefabricated bodies with curved surfaces. For example... Figure 12 As shown, the needle-punching device can also be used to fix the nasal cone preform 220 by needle-punching. Figure 13 , 14 As shown, the needle-punching device can also be used to needle-punch and fix fiber composite preforms 230 with curved surfaces at both ends. Since it contains two curved surfaces to be needle-punched and reinforced, two curved surface needle-punching mechanisms 400 need to be set up. Alternatively, another curved surface needle-punching mechanism 400 can be fixed to one side of the frame 100 by a robotic arm 700. This is not a limitation.

[0098] In summary, the needle-punching device described in this application embodiment, by incorporating a curved surface needle-punching mechanism 400 for needle-punching and fixing curved surfaces, can automate the needle-punching and fixing of curved parts of the fiber composite preform, thereby improving the overall automation level and processing efficiency of the processing of fiber composite preforms containing curved surfaces, and effectively ensuring product consistency and reliability. Furthermore, this application embodiment also includes an automatic feeding mechanism and an automatic cutting mechanism, which automatically feed the core mold and automatically cut it into the shape that can form the target fiber composite preform, improving the automation level of the entire preform manufacturing process, increasing production efficiency, and reducing the risk of personnel injury.

[0099] It should be understood that although quantifiers such as "first," "second," etc., may be used herein to describe various units, these units should not be limited by these terms. These terms are used merely to distinguish one unit from another. For example, without departing from the scope of the exemplary embodiments, a first unit may be referred to as a second unit, and similarly, a second unit may be referred to as a first unit.

[0100] The directional terms such as "outer," "middle," and "inner" mentioned or potentially used in this specification are defined relative to the structures shown in the accompanying drawings. They are relative concepts and may therefore vary depending on their location and usage. Therefore, these or other directional terms should not be interpreted as restrictive.

[0101] The above description is merely a preferred embodiment of this application and is not intended to limit this application in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from the method of this application, and these improvements and additions should also be considered within the scope of protection of this invention. Any modifications, alterations, and equivalent variations made by those skilled in the art without departing from the spirit and scope of this application, based on the disclosed technical content, are equivalent embodiments of this application. Furthermore, any modifications, alterations, and variations made to the above embodiments based on the essential technology of this application still fall within the scope of the technical solution of this application.

Claims

1. A curved needling mechanism, characterized in that, The application relates to a curved surface needling device. The device comprises: at least two adaptive needle plates arranged side by side, the front surface of the adaptive needle plates being provided with needles; a first driving device, the driving shaft of which is connected with the back surface of the adaptive needle plates one by one, for driving the adaptive needle plates to move forward and backward, so as to adjust the curvature radius of the curved surface formed by the front ends of the needles on the adaptive needle plates; a guide rail connected with the first driving device; in a first state, each first driving device can move axially on the guide rail; in a second state, each first driving device is fixed on the guide rail and cannot move; a second driving device, the driving shaft of which is connected with the guide rail, for driving the guide rail and the adaptive needle plates on the guide rail to move forward and backward in the second state, so as to drive the needles to penetrate into or exit from the curved surface to be needled and reinforced; the guide rail is an electromagnet type guide rail, the electromagnet type guide rail is internally provided with an electromagnet, and the shell of the first driving device is made of metal which can be attracted by the electromagnet; in the first state, the electromagnet type guide rail is not electrified, and each first driving device can move axially on the electromagnet type guide rail; in the second state, the electromagnet type guide rail is electrified to generate electromagnetic attraction force, and each first driving device is adsorbed, so that the position of each first driving device on the electromagnet type guide rail is fixed and cannot move; the adaptive needle plates are provided with pressure sensors for detecting the reaction force of the curved surface to be needled and reinforced on the needles; 2. A curved needle insertion mechanism as defined in claim 1, wherein, in the first state, the corresponding adaptive needle plate is driven by the first driving device to move forward, and gradually approaches the curved surface to be needled and reinforced; when the pressure signal detected by the pressure sensor reaches the set threshold value, the position of the driving shaft of the corresponding first driving device is locked; when the pressure signals detected by all the pressure sensors all reach the set threshold value, the electromagnet type guide rail is controlled to be electrified, that is, the second state. the adjacent adaptive needle plates are connected through hinges; and / or 3. A curved needle insertion mechanism as defined in claim 1, wherein, the driving shaft of the first driving device is connected with the back surface of the adaptive needle plate through a hinge.

4. A needling device characterized by, the second driving device is arranged on a direction adjusting device with one or more degree of freedom adjusting functions.

5. A lancing device as in claim 4, wherein, The device comprises the curved surface needling mechanism as claimed in any one of claims 1 to 3. The device comprises: a frame body, the frame body being provided with a core mold and a third driving device for driving the core mold to rotate; an automatic feeding mechanism for feeding fiber materials to the core mold, so that the fiber materials are wound on the core mold under the driving of the third driving device; 6. A lancing device as in claim 5, wherein, the curved surface needling mechanism is arranged on the frame body and can be adjusted up and down and left and right, and is used for carrying out a needling process on the fiber materials wound on the curved surface of the core mold.

7. A lancing device as in claim 6, wherein, The automatic feeding mechanism comprises a feeding bracket, the feeding bracket being formed with a feeding plane for laying the fiber materials, and the core mold can drive the fiber materials to be wound on the core mold when the core mold rotates. The needling device further comprises an automatic cutting mechanism for cutting the fiber materials into a shape capable of forming a target preform during the feeding process.

8. A lancing device as in claim 7, wherein, The automatic cutting mechanism comprises a portal erected on the feeding plane, the portal is provided with a laser emitter which can move up and down and left and right, and the laser emitter can cut the fiber material.

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