A prefabricated integrated mandrel for weaving / needling / stitching and its matching slide mechanism

Abstract

This invention discloses an integrated preform weaving / needling / stitching mandrel and its matching sliding mechanism. The mandrel includes a rear stitching area, needle-punched reinforcing ribs, a middle needle-punched area, and a front stitching area. The matching sliding mechanism includes the mandrel, a rotating device, a lifting device, and a translation device. Compared to existing technologies, this invention integrates multiple processes such as weaving, needle-punching, and stitching, while simultaneously achieving stable and reliable forming of multi-process composite conical preforms.

Description

Technical Field

[0001] This invention relates to the field of three-dimensional prefabricated body weaving technology, specifically to a prefabricated body weaving / needling / stitching integrated core mold and its matching slide mechanism. Background Technology

[0002] Composite conical components formed from composite materials based on three-dimensional weaving, needle punching, and stitching processes can achieve regional deformation and shape maintenance, which is of great significance for improving the dynamic performance of future aircraft. Currently, the forming process of composite conical preforms at home and abroad mainly focuses on forming single structures and single processes, which presents challenges such as complex connections between different fabrics and difficulty in integrating multi-process composite preforms. To achieve stable and reliable forming of multi-process composite conical preforms, it is necessary to develop multi-process integrated forming equipment for composite preforms. Among them, the integrated mandrel for preform weaving / needling / stitching and its matching slide mechanism are important components of the equipment. Summary of the Invention

[0003] Purpose of the invention: To solve the above problems, the present invention provides an integrated core mold for prefabricated body weaving / needling / stitching and its matching slide mechanism, which satisfies the integration of multiple processes such as weaving, needle punching and stitching, and realizes the stable and reliable forming of multi-process composite conical prefabricated bodies.

[0004] Technical Solution: To achieve the above objectives, the prefabricated integrated braiding / needling / stitching core mold of the present invention includes a central shaft hole portion, a rear end stitching area, a front end stitching area, a central needle-punching area, and needle-punching reinforcing ribs; the rear end stitching area, the front end stitching area, and the central needle-punching area are all frustum-shaped rings, gradually decreasing in size from back to front; the needle-punching reinforcing ribs extend circumferentially from the outside of the shaft hole portion and connect to the inner circle of the central needle-punching area; one end of the central needle-punching area connects to the rear end stitching area, and the other end connects to the front end stitching area; the rear end stitching area, the front end stitching area, the central shaft hole, and the central needle-punching area are all located on the same axis.

[0005] Furthermore, both the rear end stitching area and the front end stitching area are provided with elongated through holes evenly distributed from front to back.

[0006] Furthermore, the needle-punched reinforcing rib is in the shape of a circular piece.

[0007] Furthermore, the outer ring size of the needle reinforcement rib is the same as the inner ring size of the central needle puncture area.

[0008] Furthermore, the rear end suture area, the front end suture area, and the middle needle-punching area are all made of 304 stainless steel.

[0009] Furthermore, the central needle-punching area has a 5mm deep groove area, and a soft pad is laid in the groove.

[0010] The slide mechanism of the integrated prefabricated body weaving / needle punching / stitching core mold of the present invention includes a slide, a bracket above the slide, a central shaft placed on the bracket, a core mold sleeved on the central shaft, a translation motor on the slide, and a ground rail connected to the translation motor; the core mold rotates synchronously with the central shaft; the slide mechanism moves along the ground rail.

[0011] Furthermore, the core mold is symmetrical about the central axis.

[0012] Furthermore, the front end of the ground rail is equipped with a liftable support.

[0013] Beneficial effects: Compared with the prior art, the present invention has the following significant effects: by combining the overall shape of the core mold with the braiding machine, the three-dimensional braiding and lay-up process of the preform is realized; by combining the sewing head with the pre-reserved long strip through hole in the sewing area, the sewing process of the preform is realized; by combining the needle punching head with the needle punching area in the middle, the preform is needle punched; and the slide table mechanism is used to meet the stability and reliability of the multi-process conformal conical preform weaving and forming. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the slide mechanism described in this invention.

[0015] Figure 2 This is a schematic diagram of the core mold described in this invention.

[0016] Figure 3 This is a schematic diagram of the equipment structure for the application of the present invention in the prefabrication process. Detailed Implementation

[0017] This invention discloses a prefabricated integrated mandrel for weaving / needling / stitching and its matching slide mechanism. Please refer to [link / reference]. Figure 1As shown below, the prefabricated integrated braiding / needling / stitching core mold provided by the present invention will be further described in detail: The core mold 1 includes a central shaft hole portion, a rear end stitching area 101, a front end stitching area 104, a central needle-punching area 103, and needle-punching reinforcing ribs 102. The rear end stitching area 101, the front end stitching area 104, and the central needle-punching area 103 are all frustum-shaped rings, gradually decreasing in size from back to front; the needle-punching reinforcing ribs 102 extend circumferentially from the outside of the shaft hole portion and connect to the inner circle of the central needle-punching area 103; one end of the central needle-punching area 103 connects to the rear end stitching area 101, and the other end connects to the front end stitching area 104; the rear end stitching area 101, the front end stitching area 104, the central shaft hole, and the central needle-punching area 103 are all located on the same axis; Both the end suture area 101 and the front suture area 104 are provided with elongated through holes evenly distributed from front to back, allowing the suture needles in both suture areas to pass through and suture the preform. The needle-punching reinforcing rib 102 is circular, and the outer circle of the needle-punching reinforcing rib 102 is the same size as the inner circle of the middle needle-punching area 103. The middle needle-punching area 103 is strengthened by the needle-punching reinforcing rib 102 to prevent the impact force during needle punching from damaging the core mold 1 and the central shaft 2. The rear suture area 101, the front suture area 104, and the middle needle-punching area 103 are all made of 304 stainless steel. Among them, the middle needle-punching area 103 is milled to form a 5mm deep groove area, and a soft pad is laid in the groove to prevent the needle from breaking due to contact with the stainless steel core mold during needle punching.

[0018] Please see Figure 2As shown below, the slide mechanism for the integrated prefabricated body knitting / needle punching / stitching core mold provided by the present invention will be further described in detail: The slide mechanism for the integrated prefabricated body knitting / needle punching / stitching core mold includes a slide 5, a support 4 above the slide 5, a central shaft 2 placed on the support 4, a core mold 1 sleeved on the central shaft 2, a translation motor 7 on the slide 5, a ground rail 8 connected to the translation motor 7, a bearing seat 3, a rotary motor 6 at the rear end of the central shaft 2, a lifting motor 9 on the liftable support 10, a liftable support 10, and a shaft end bearing seat 11; wherein, the core mold 1 rotates synchronously with the central shaft 2; the slide mechanism moves along the ground rail 8; the core mold 1 is symmetrical about the central shaft 2; the front end of the ground rail 8 is provided with a liftable support 10; the rotary motor 6 controls the rotation of the core mold 1 and the central shaft 2; the central shaft 2 is fixedly installed on the slide 5 by the bearing seat 3 and the support 4; the ground rail 8 is installed in cooperation with the translation motor 7 through a rack and pinion; and the lifting motor 9 controls the lifting of the liftable support 10. The movement process of the slide mechanism is as follows: the rotary motor 6 drives the central shaft 2 and the core mold 1 to rotate, so as to realize the complete needle punching or sewing of the preform on the core mold 1; the translation motor 7 drives the slide mechanism to move back and forth along the ground rail 8, so as to realize the overall weaving of the braiding machine on the core mold 1; the lifting motor 9 drives the liftable bracket 10 to lift and lower, and connects with the shaft end bearing seat 11 to realize the support and fixation function when the preform on the core mold 1 is needle punched.

[0019] Please see Figure 3 As shown, the integrated preform weaving / needling / stitching mandrel and its matching slide mechanism provided by this invention are applied to the preform 203 manufacturing process. The process equipment required for this process includes: a stitching head 201, a stitching robotic arm 202, a needle punching head 204, a needle punching robotic arm 205, a mandrel 1, a slide mechanism, and a radial three-dimensional weaving machine 206. The process includes the following steps: S1 Three-dimensional weaving: The radial three-dimensional weaving machine 206 performs the overall weaving of the bottom layer on the mandrel. During the weaving process, the motor drives the slide mechanism to move translationally together with the mandrel 1 to realize the take-up action of the weaving process; S2 Laying up: Bottom layer weaving After completion, the layers are laid manually according to the process requirements to prepare for the subsequent suturing and needle punching processes; S3 Suturing: The suturing robot arm 202 drives the suturing head 201 to sew the preform 203 in the suturing area of ​​the core mold 1. The robot arm 202 can precisely control the position and movement of the suturing head 201 to ensure that the suturing needle is suturing in the elongated oval hole reserved in the core mold 1; S4 Needling: The needle punching robot arm 205 drives the needle punching head 204 to needle the preform 203 in the needle punching area of ​​the core mold 1. The rotary motor drives the core mold 1 to rotate to ensure that the preform 203 in the entire needle punching area can be needle punched completely and evenly.

Claims

1. A prefabricated integrated core mold for weaving / needling / stitching, characterized in that, It includes a central shaft hole, a rear end suture area (101), a front end suture area (104), a central needle-punched area (103), and a needle-punched reinforcing rib (102). The rear end suture area (101), the front end suture area (104), and the central needle-punched area (103) are all frustum-shaped rings, gradually decreasing in size from back to front. The needle-punched reinforcing rib (102) extends circumferentially from the outside of the shaft hole and connects to the inner circle of the central needle-punched area (103). One end of the central needle-punched area (103) is connected to the rear end suture area (101), and the other end is connected to the front end suture area (104). The rear end suture area (101), the front end suture area (104), the central shaft hole, and the central needle-punched area (103) are all located on the same axis. The rear end suture area (101) and the front end suture area (104) are both provided with elongated through holes evenly distributed from front to back. The central needle-punched area (103) is provided with a 5mm deep groove area, and a soft pad is laid in the groove.

2. The prefabricated integrated core mold for weaving / needling / stitching according to claim 1, characterized in that, The needle-punched reinforcing rib (102) is in the shape of a round plate.

3. The prefabricated integrated core mold for weaving / needling / stitching according to claim 1, characterized in that, The outer ring of the needle reinforcement rib (102) is the same size as the inner ring of the central needle puncture area (103).

4. The prefabricated integrated core mold for weaving / needling / stitching according to claim 1, characterized in that, The rear suture area (101), the front suture area (104), and the middle needle-punching area (103) are all made of 304 stainless steel.

5. A slide mechanism for a prefabricated integrated core mold for weaving / needling / stitching as described in claim 1, characterized in that, It includes a slide (5), a bracket (4) above the slide (5), a central shaft (2) on the bracket (4), a translation motor (7) on the slide (5), and a ground rail (8) connected to the translation motor (7); the central shaft passes through the shaft hole of the core mold (1), and the core mold rotates synchronously with the central shaft (2); the slide mechanism moves along the ground rail (8).

6. The slide mechanism for the integrated prefabricated weaving / needle punching / stitching core mold according to claim 5, characterized in that, The core mold (1) is symmetrical about the central axis (2).

7. The slide mechanism for the integrated prefabricated weaving / needle punching / stitching core mold according to claim 6, characterized in that, The ground rail (8) is provided with a liftable support (10) at its front end.

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