Needling operation tool with adjustable needling depth

Abstract

The utility model discloses a needling operation tool with adjustable needling depth, which comprises a connecting structure, one end of the connecting structure is connected with a needling depth adjusting mechanism, and one end, far away from the connecting structure, of the needling depth adjusting mechanism is connected with a needling mechanism; the needling mechanism can be driven by the needling depth adjusting mechanism to move, and the needling mechanism can stretch out and draw back. Through the tool provided by the utility model, the structural partition design and rapid molding of the needling preform in a complex shape can be realized, the function / structure integrated rapid needling molding requirements of various types and small batches of special-shaped parts are further met, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of composite material fiber preform manufacturing equipment, and particularly relates to a needling operation tool with adjustable needling depth. Background Art

[0002] The statements herein merely provide background art related to the present invention and do not necessarily constitute prior art.

[0003] Three-dimensional needle punching is a cost-effective and efficient technology for producing three-dimensional fabric preforms. Using barbed needles, the fibers within a sheet (cloth or mesh) are knitted into an interwoven, low-density, high-porosity network. Currently, this is the mainstream fiber-reinforced manufacturing method for low-density thermal insulation materials. It has been applied in key components such as missile tips, solid rocket motor throat liners, nozzle expansion sections, and special-shaped thermal insulation components for high-speed aircraft.

[0004] The zoning design of the needle-punched preform structure can achieve the functions of heat-proof material structure dimension, ablation resistance, high-efficiency thermal insulation, light weight and reliability. For example, the outer layer structure is tight (high fiber ratio) to achieve large load-bearing capacity and ablation resistance, and the inner layer structure is loose (low fiber ratio) to achieve high-efficiency thermal insulation, that is, different fiber structures can achieve different functions, and organically combined into a whole can achieve more functions. However, most of the existing needling equipment is customized, that is, a set of needling equipment is developed for a fiber structure or component shape. Among them, the needling operation tools cannot change the needling process parameters in real time during the working process, and it is impossible to meet the needs of rapid needling forming of various types and small batches of special-shaped parts with integrated functions or structures. Utility Model Content

[0005] The purpose of the utility model is to provide a needling operation tool with adjustable needling depth, which can realize the structural partitioning design and rapid prototyping of complex-shaped needling preforms, further meet the needs of rapid needling prototyping of various types and small batches of special-shaped parts with integrated functions / structures, and improve work efficiency.

[0006] In order to achieve the above purpose, the present invention is implemented through the following technical solutions:

[0007] In the first aspect, an embodiment of the present invention provides a needling tool with adjustable needling depth, comprising a connecting structure, one end of the connecting structure being connected to a needling depth adjustment mechanism, and an end of the needling depth adjustment mechanism being away from the connecting structure being connected to a needling mechanism; the needling mechanism can move driven by the needling depth adjustment mechanism, and the needling mechanism can move telescopically.

[0008] As a further technical solution, the connection structure is a connecting flange.

[0009] As a further technical solution, the acupuncture depth adjustment mechanism includes a base plate, a first bearing seat, a second bearing seat, a first drive structure and a sliding structure; the two ends of the base plate are respectively fixedly connected to the first bearing seat and the second bearing seat, the sliding structure is arranged on the base plate between the first bearing seat and the second bearing seat, the sliding structure is connected to the first drive structure, and the first drive structure is connected to the first bearing seat;

[0010] The sliding structure includes a linear guide rail and a slide table. The linear guide rail is arranged on a bottom plate between the first bearing seat and the second bearing seat. The slide table is slidably connected to the linear guide rail.

[0011] As a further technical solution, one end of the first bearing seat away from the bottom plate is connected to the connecting structure; and one end of the second bearing seat away from the first bearing seat is connected to the acupuncture mechanism.

[0012] As a further technical solution, the first driving structure includes a reducer, one end of the reducer is connected to the servo motor, and the other end is connected to the lead screw.

[0013] As a further technical solution, the end of the screw close to the reducer is connected to the first bearing seat, and the end away from the first bearing seat is connected to the second bearing seat. The slide is connected to the screw between the first bearing seat and the second bearing seat through threads.

[0014] As a further technical solution, the acupuncture mechanism includes a second driving structure, a needle structure, a side plate, and a stripping plate;

[0015] The needle structure is connected to the second driving structure and can move under the drive of the second driving structure; one end of the side plate is connected to the second bearing seat, and the end away from the second bearing seat is connected to the stripping plate.

[0016] As a further technical solution, the second driving structure is connected to the slide.

[0017] As a further technical solution, the second driving structure includes a cylinder and a piston rod; the needle structure includes a needle seat, and the needle seat is provided with multiple needles; the piston rod is connected to the needle seat, and the multiple needles can pass through the stripping plate.

[0018] As a further technical solution, the stripping plate is provided with a plurality of through holes, the number of the through holes being consistent with the number of the needles, and the plurality of needles can pass through the stripping plate respectively through the plurality of through holes.

[0019] The beneficial effects of the above embodiments of the present invention are as follows:

[0020] By setting up a needling depth adjustment mechanism, the needling mechanism can move under the drive of the needling depth adjustment mechanism, and the needling mechanism can also move telescopically. The movements of the needling depth adjustment mechanism and the needling mechanism are independent of each other and do not interfere with each other, so that the needling operation tool provided by the utility model can realize the structural partitioning design and rapid prototyping of complex-shaped needling preforms, further meet the needs of rapid needling prototyping of various types and small batches of special-shaped parts with integrated functions or structures, and improve working efficiency.

[0021] In addition, the needling depth adjustment mechanism is controlled by a servo motor, which can realize real-time and precise adjustment of the needling depth. It is easy to operate and highly reliable. At the same time, after the needling depth is adjusted, the relative position of the needling tool and the preform surface will not change, and no secondary positioning is required, which improves the needling operation efficiency. When combined with a robotic arm, it can realize automated needling forming of complex-shaped preform structure partitions. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings in the specification, which constitute a part of the present invention, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0023] Figure 1 This is an isometric diagram of the overall structure of a needling tool with adjustable needling depth provided in Example 1 of the present invention;

[0024] Figure 2 This is a schematic top view of the overall structure of a needling tool with adjustable needling depth provided in Example 1 of the present utility model;

[0025] Figure 3 This is a front view schematic diagram of the overall structure of a needling tool with adjustable needling depth provided by Example 1 of the present utility model;

[0026] Figure 4 This is a schematic diagram of the use status of a needling tool with adjustable needling depth provided by Example 1 of the present utility model.

[0027] The diagram is for illustrative purposes only;

[0028] Among them, 1. connecting flange; 2. first bearing seat; 3. reducer; 4. servo motor; 5. linear guide; 6. screw; 7. slide; 8. base plate; 9. second bearing seat; 10. cylinder; 11. piston rod; 12. needle seat; 13. needle; 14. side panel; 15. stripping plate; 16. robotic arm; 17. needle-punched preform; 18. soft foam board. DETAILED DESCRIPTION

[0029] It should be noted that the following detailed descriptions are exemplary and are intended to provide further explanation of the present invention. Unless otherwise specified, all technical and scientific terms used in the present invention have the same meanings as those commonly understood by those skilled in the art to which the present invention belongs.

[0030] Example 1

[0031] In a typical embodiment of the present invention, Figure 1-3 As shown, a needling tool with adjustable needling depth is provided, including a connecting structure, one end of the connecting structure is connected to the needling depth adjustment mechanism, and the end of the needling depth adjustment mechanism away from the connecting structure is connected to the needling mechanism; the needling mechanism can move under the drive of the needling depth adjustment mechanism, and the needling mechanism can move telescopically.

[0032] The movements of the needling depth adjustment mechanism and the needling mechanism are independent of each other and do not interfere with each other, so that the needling operation tool provided by the present invention can realize the structural partitioning design and rapid prototyping of complex-shaped needling preforms 17, further meeting the needs of rapid needling prototyping of various types and small batches of special-shaped parts with integrated functions or structures, and improving work efficiency.

[0033] In this embodiment, the connection structure is a connection flange 1, which is fixed by bolts to the side of the first bearing seat 2. In other embodiments of the present invention, other connection structures that can achieve stable connection can be used.

[0034] The acupuncture depth adjustment mechanism includes a base plate 8, a first bearing seat 2, a second bearing seat 9, a first driving structure and a sliding structure; the two ends of the base plate 8 are fixedly connected to the first bearing seat 2 and the second bearing seat 9 respectively, and the sliding structure is arranged on the base plate 8 between the first bearing seat 2 and the second bearing seat 9. The sliding structure is connected to the first driving structure, and the first driving structure is connected to the first bearing seat 2.

[0035] The sliding structure includes a linear guide rail 5 and a slide 7. The linear guide rail 5 is arranged on a base plate 8 between the first bearing seat 2 and the second bearing seat 9. The slide 7 is slidably connected to the linear guide rail 5.

[0036] In this embodiment, the base plate 8 is vertically fixedly connected to the first bearing seat 2 and the second bearing seat 9, two linear guide rails 5 are provided and are parallel to each other and parallel to the base plate 8, and are also vertically fixedly connected to the first bearing seat 2 and the second bearing seat 9, and the slide 7 is slidably connected to the two linear guide rails respectively.

[0037] One end of the first bearing seat 2 away from the bottom plate 8 is connected to the connecting structure; one end of the second bearing seat 9 away from the first bearing seat 2 is connected to the acupuncture mechanism.

[0038] The first drive structure includes a reducer 3, one end of which is connected to a servo motor 4, and the other end is connected to a lead screw. The ends of the lead screw are respectively connected to the first bearing seat 2 and the second bearing seat 9. The slide 7 is threadedly connected to the lead screw between the first bearing seat 2 and the second bearing seat 9. In this embodiment, the reducer 3 is fixed in the middle of the first bearing seat 2, the servo motor 4 is arranged at the bottom of the first bearing seat 2, one end of the lead screw passes through the first bearing seat 2 and is connected to the reducer 3, and the other end is connected to the second bearing seat 9. The slide 7 is threadedly connected to the lead screw between the first bearing seat 2 and the second bearing seat 9, and the lead screw is parallel to the two linear guide rails 5.

[0039] The acupuncture mechanism includes a second drive structure, a needle structure, a side plate 14, and a stripping plate 15; the needle structure is connected to the second drive structure and can move under the drive of the second drive structure; one end of the side plate 14 is connected to the second bearing seat 9, and the end away from the second bearing seat 9 is connected to the stripping plate 15.

[0040] The second driving structure is connected to the slide 7 .

[0041] The second driving structure includes a cylinder 10 and a piston rod 11 ; the puncture needle structure includes a puncture needle seat 12 , on which a plurality of puncture needles 13 are provided; the piston rod 11 is connected to the puncture needle seat 12 , and the plurality of puncture needles 13 can pass through the stripping plate 15 .

[0042] The stripping plate 15 is provided with a plurality of through holes, the number of which is the same as the number of the needles 13 , and the plurality of needles 13 can pass through the stripping plate 15 respectively through the plurality of through holes.

[0043] In this embodiment, the cylinder 10 is fixed to the slide 7 by bolts, the piston rod 11 is connected to the cylinder 10 through the piston hole, the needle holder 12 is mounted on the piston rod 11 by bolts, the needle 13 is mounted in the circular hole of the needle holder 12 by interference fit, the side plate 14 is mounted on one side of the second bearing seat 9 by bolts, and the stripping plate 15 is mounted on the side plate 14 by bolts, and a circular hole is opened on the stripping plate 15 to allow the needle 13 to pass through.

[0044] The working principle of the acupuncture tool with adjustable acupuncture depth provided by the utility model is as follows: Figure 4 As shown:

[0045] Fix the acupuncture tool to the end of the robot arm 16 through the connecting flange 1, and establish control communication to achieve linkage between the various structures;

[0046] Using fiber mesh tire (110g / m 2 ) and fiber cloth (200g / m 2 ) are formed into a laminated unit in a ratio of 1:1 and applied to the soft foam board 18;

[0047] By using an existing programmable logic controller to drive the servo motor 4, the reducer 3 is driven to rotate, and the screw 6 connected to the reducer 3 also rotates synchronously. The screw 6 drives the slide 7 to move linearly along the linear guide 5 through the thread, and the cylinder installed on the slide 7 also moves accordingly, so that the acupuncture mechanism can be driven by the acupuncture depth adjustment mechanism to move closer to or away from the soft foam board 18, thereby achieving the adjustment of the acupuncture depth;

[0048] Then, the cylinder 10 drives the piston rod 11 to reciprocate, and the needles 13 on the needle holder 12 move along with the piston rod 11. When the needles 13 approach the soft foam board 18, the needle hooks penetrate the short fibers in the web into the thickness direction. Then, the needles 13 move away from the soft foam board 18, and the short fibers remain in the needle-punched preform 17, completing one needling operation.

[0049] Then the robot arm 16 moves to the next set position, adjusts the needling depth, and then performs the needling operation, repeating the above steps until the needling operation of the current laminate unit is completed;

[0050] A new laminated unit is laid on the laminated unit after needling, and the robot arm 16 is moved according to the program setting, the needling depth is adjusted, and then the needling operation is carried out, and the cycle is repeated until the needle-punched preform 17 reaches the set thickness.

[0051] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A needling tool with adjustable needling depth, characterized in that: The device comprises a connecting structure, one end of the connecting structure is connected to the acupuncture depth adjustment mechanism, and the end of the acupuncture depth adjustment mechanism away from the connecting structure is connected to the acupuncture mechanism; the acupuncture mechanism can move under the drive of the acupuncture depth adjustment mechanism, and the acupuncture mechanism can move telescopically; The acupuncture depth adjustment mechanism includes a base plate, a first bearing seat, a second bearing seat, a first driving structure and a sliding structure; the two ends of the base plate are respectively fixedly connected to the first bearing seat and the second bearing seat, the sliding structure is arranged on the base plate between the first bearing seat and the second bearing seat, the sliding structure is connected to the first driving structure, and the first driving structure is connected to the first bearing seat; the sliding structure includes a linear guide rail and a slide, the linear guide rail is arranged on the base plate between the first bearing seat and the second bearing seat, and the slide is slidably connected to the linear guide rail; the acupuncture mechanism includes a second driving structure, a needle structure, a side plate, and a stripping plate; the needle structure is connected to the second driving structure and can move under the drive of the second driving structure.

2. A needling tool with adjustable needling depth according to claim 1, characterized in that: The connecting structure is a connecting flange.

3. The needling tool with adjustable needling depth according to claim 1, characterized in that: One end of the first bearing seat away from the bottom plate is connected to the connecting structure; and one end of the second bearing seat away from the first bearing seat is connected to the acupuncture mechanism.

4. The needling tool with adjustable needling depth according to claim 1, wherein: The first driving structure includes a reducer, one end of the reducer is connected to the servo motor, and the other end is connected to the lead screw.

5. A needling tool with adjustable needling depth according to claim 4, characterized in that: The end of the lead screw close to the reducer is connected to the first bearing seat, and the end away from the first bearing seat is connected to the second bearing seat. The slide is connected to the lead screw between the first bearing seat and the second bearing seat through threads.

6. The needling tool with adjustable needling depth according to claim 1, characterized in that: One end of the side plate is connected to the second bearing seat, and the other end away from the second bearing seat is connected to the stripping plate.

7. A needling tool with adjustable needling depth according to claim 6, characterized in that: The second driving structure is connected to the slide.

8. The needling tool with adjustable needling depth according to claim 6, characterized in that: The second driving structure includes a cylinder and a piston rod; the puncture needle structure includes a puncture needle seat, and the puncture needle seat is provided with a plurality of puncture needles; the piston rod is connected to the puncture needle seat, and the plurality of puncture needles can pass through the stripping plate.

9. The needling tool with adjustable needling depth according to claim 8, characterized in that: The stripping plate is provided with a plurality of through holes, the number of the through holes being consistent with the number of the needles, and the plurality of needles can pass through the stripping plate respectively through the plurality of through holes.

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