TWI789684B - Three-dimensional fiber preform weaving method - Google Patents

Abstract

The present invention provides a three-dimensional fiber preform weaving method. By designing a hybrid puncture and shaft rod preform weaving device, fiber rods are used to replace the Z-direction steel needles. The fiber rods are inserted into the lower porous plate and fixed, and fiber yarn bundles are used instead. For woven cloth, the fiber yarn bundles are placed in the fiber rod intervals and repeatedly wound around the side railing frame, stacked layer by layer in the XY direction, and woven into a preform to solve the problem that sometimes the fiber is difficult to penetrate into the steel needle when the preform is punctured. The hole is difficult and the shaft rod preform is skewed due to the bending of the fiber rod, causing the preform structure to be skewed or unable to be formed.

Description

Three-dimensional fiber preform weaving method

The present invention relates to a three-dimensional fiber preform weaving method, in particular to a three-dimensional fiber preform weaving method designed for a mixed piercing and shaft rod preform weaving device.

Composite materials are composed of two or more materials, which can be divided into reinforcing materials and base materials. The structural strength mainly comes from reinforcing materials, such as glass fiber or carbon fiber. The substrate provides the structural framework for bonding reinforcements, such as epoxy or phenolic resins or carbon substrates. Compared with ordinary materials, composite materials have anisotropic properties, which can produce different structural properties according to different application requirements. Generally, the traditional thermoforming composite materials production methods, the most commonly used methods are autoclave, vacuum/pressurized bag, resin transfer or hot press thermoforming, etc., but they all belong to two-dimensional laminated composite materials and three-dimensional braided composite materials. Preforms can be roughly divided into three categories: acupuncture, puncture and mandrel preforms.

The needle-punched preform is to stack the cut woven cloth and the net blanket (thin blanket with random distribution of short fibers), and use the special needles with inverted hooks to place the stacked woven cloth and the net blanket in the thickness direction. Acupuncture is performed so that the short fibers remain in the blanket body in an almost vertical state to form a three-dimensional net-like structure preform. The puncture preform is a combination of woven fabric and orthogonal non-woven three-way fabric, and the woven fabric is laid on Z After piercing the steel needle matrix to a certain height, the Z-direction steel needles are replaced by fibers one by one to make a three-dimensional fiber preform. The shaft rod preform uses fiber rods as the weaving unit, and the cross-section of the fiber rods can be in various shapes such as round, square, polygonal, etc. According to the shape and size requirements of the preform, special clamps and devices are designed to facilitate placement With fixed fiber rods, the preform is woven into a stable structure.

However, at present, to puncture the preform, it is necessary to use z-direction steel needles to puncture the woven fabric first, and then replace the Z-direction steel needles one by one with fibers. Sometimes the fibers are difficult to penetrate into the holes formed by the steel needles, making it difficult to puncture the fibers. In addition, the fiber rod used in the shaft rod preform has a certain hardness requirement, and the surface must be smooth and straight without bending or skewing. Otherwise, the fiber rod cannot be placed in a fixed position, which may easily cause the structure of the preform to be skewed or unable to be formed.

To sum up, the current weaving method of three-dimensional braided composite material preform still has defects. Therefore, the applicant of this case developed a three-dimensional fiber preform weaving method through painstaking research, which effectively solves the problem that sometimes the fibers are difficult to puncture the preform. Difficulty penetrating into the hole formed by the steel needle and the preform of the shaft rod is skewed due to the bending of the fiber rod, causing the structure of the preform to be skewed or unable to be formed.

In view of the shortcomings of the above-mentioned known technologies, the main purpose of the present invention is to provide a three-dimensional fiber preform weaving method, by designing a mixed piercing and shaft rod preform weaving device, replacing the Z-direction steel needle with a fiber rod, and inserting the fiber rod The lower perforated plate is fixed, and the woven fabric is replaced by fiber yarn bundles. The fiber yarn bundles are placed in the fiber rod intervals and repeatedly wound around the side column frames, stacked layer by layer in XY Direction, woven into a preform to solve the problem that sometimes the fiber is not easy to penetrate into the hole formed by the steel needle and the axis rod preform is skewed due to the bending of the fiber rod, which causes the preform structure to be skewed or unable to be formed.

In order to achieve the above object, according to a solution proposed by the present invention, a method for weaving a three-dimensional fiber preform is provided. The steps include: (A) providing a perforated plate and a plurality of column frames, wherein the surface of the perforated plate has multiple holes, and the plurality of column frames are arranged on the surrounding sides of the perforated plate; (B) insert a plurality of fiber rods into the plurality of holes of the perforated plate in the Z-axis direction and fix them; (C) place a fiber The yarn bundle is placed in the space between the plurality of fiber rods and repeatedly wound around the plurality of post frames around the sides, stacked layer by layer in the X-axis and Y-axis directions, and judge whether the stacking height meets the product requirements; ( D) Obtain a three-dimensional fiber preform.

Preferably, the shape of the porous plate can be circular, square or polygonal.

Preferably, the shapes of the plurality of holes can be circular, square or polygonal.

Preferably, the fiber material of the plurality of fiber rods can be glass fiber, quartz fiber, carbon fiber, kaolin fiber or mullite fiber.

Preferably, the resin substrate of the plurality of fiber rods can be made of epoxy resin, phenolic resin or acrylic resin.

Preferably, the fiber material of the fiber yarn bundle can be glass fiber, quartz fiber, carbon fiber, kaolin fiber or mullite fiber.

Preferably, step (C) judges whether the stacking height meets product requirements The required size range can be 0.5~100.0cm.

The above overview, the following detailed description and the accompanying drawings are all for further explaining the ways, means and effects of the present invention to achieve the intended purpose. Other purposes and advantages of the present invention will be described in the subsequent description and drawings.

1: perforated plate

2: column frame

S101-S104: Steps

The first figure is a schematic diagram of the mixed piercing and mandrel preform weaving device of the present invention.

The second figure is a flowchart of a three-dimensional fiber preform weaving method of the present invention.

The third figure is the three-dimensional fiber preform of the present invention.

The implementation of the present invention is described below through specific examples, and those skilled in the art can easily understand the advantages and effects of this creation from the content disclosed in this specification.

Please refer to the first figure and the second figure, the first figure is a schematic diagram of the hybrid piercing and mandrel preform weaving device of the present invention, and the second figure is a flow chart of a three-dimensional fiber preform weaving method of the present invention. The present invention is to provide a three-dimensional fiber preform weaving method, the steps include: step S101, providing a porous plate 1 and a plurality of column frames 2, wherein the surface of the porous plate has a plurality of holes, and the plurality of column frames are arranged on the porous plate around the sides of the board. Step S102, the complex Several fiber rods are inserted into a plurality of holes of the porous plate 1 in the direction of the Z axis perpendicular to the surface of the porous plate and fixed. Step S103, put the fiber yarn bundle into the space between a plurality of fiber rods and repeatedly wind it around a plurality of column frames 2 around the sides in the X-axis and Y-axis directions, and stack them layer by layer in the X-axis and Y-axis directions , and judge whether the stack height meets the product requirements. If the stacking height meets the product requirements, proceed to step S103 to obtain a three-dimensional fiber preform (as shown in the third figure). If the stacking height meets the product requirements, repeat step S103, put the fiber yarn bundle into the space between a plurality of fiber rods and repeatedly wind around the plurality of post frames 2 around the sides in the X-axis and Y-axis directions, Stack layer by layer in the X-axis and Y-axis directions, and judge whether the stacking height meets the product requirements.

As mentioned above, the invention creates a preform by first placing the fiber rods fixed in the Z-axis direction, and then reciprocatingly stacking the fiber bundles in the XY direction to form a preform, which solves the problem that sometimes the fibers are difficult to penetrate into the steel needle when piercing the preform. Difficulty forming holes and shaft rod preform due to bending and skewing of fiber rods, resulting in skewed preform structure or failure to form.

In this embodiment, the shape of the porous plate can be various shapes such as circle, square or polygon.

In this embodiment, the shapes of the plurality of holes can be various shapes such as circle, square or polygon. The present invention uses a plurality of holes in the perforated plate to fix the fiber rods. Compared with the shaft rod preform, a special fixture and device are designed to place and fix the fiber rods, which is much more convenient, and the fiber rods are not easy to bend and skew .

In this embodiment, the fiber material of the plurality of fiber rods can be Various fibers such as glass fiber, quartz fiber, carbon fiber, kaolin fiber or mullite fiber.

In this embodiment, the resin base material of the plurality of fiber rods can be made of various resins such as epoxy resin, phenolic resin or acrylic resin.

In this embodiment, the fiber material of the fiber bundle can be various fibers such as glass fiber, quartz fiber, carbon fiber, kaolin fiber or mullite fiber.

In this embodiment, the size range of the step (C) to determine whether the stacking height meets the product requirements can be 0.5-100.0 cm, and this range is also the braiding height that the fiber rod of the present invention can support.

To sum up, the three-dimensional fiber preform weaving method of the present invention can implement preform weaving with simple perforated plate 1 and column frame 2, eliminating the need for Z-direction steel needles to puncture the woven fabric multiple times to puncture the preform procedures, and eliminate the difficulty that sometimes the fiber is not easy to penetrate into the Z-direction hole in the puncture preform, and there is no need to design special fixtures and devices like the shaft rod preform, and the preform will not be caused by bending and skewing of the fiber rod The body structure is skewed or cannot be formed.

The above-mentioned embodiments are only illustrative to illustrate the characteristics and functions of the invention, and are not intended to limit the scope of the essential technical content of the invention. Any person familiar with the art can modify and change the above-mentioned embodiments without departing from the spirit and scope of creation. Therefore, the scope of protection of the rights of the present invention should be listed in the scope of the patent application described later.

S101-S104: Steps

Claims (6)

A method for weaving a three-dimensional fiber preform, the steps comprising: (A) providing a porous plate and a plurality of column frames, wherein the surface of the porous plate has a plurality of holes, and the plurality of column frames are arranged on the porous plate (B) insert a plurality of fiber rods into the plurality of holes of the perforated plate in the Z-axis direction and fix them; (C) put a fiber bundle into the space between the plurality of fiber rods and The plurality of post frames that are repeatedly wound around the sides are stacked layer by layer in the X-axis and Y-axis directions, and it is judged whether the stacking height meets the product requirements; (D) a three-dimensional fiber preform is obtained, wherein the plurality of fibers The resin substrate of the rod is made of epoxy resin, phenolic resin or acrylic resin. A three-dimensional fiber preform weaving method as described in item 1 of the patent application, wherein the shape of the porous plate is circular, square or polygonal. A three-dimensional fiber preform weaving method as described in item 1 of the patent application, wherein the shapes of the plurality of holes are circular, square or polygonal. A three-dimensional fiber preform weaving method as described in item 1 of the patent application, wherein the fiber material of the plurality of fiber rods is glass fiber, quartz fiber, carbon fiber, kaolin fiber or mullite fiber. A three-dimensional fiber preform weaving method as described in item 1 of the patent application, wherein the fiber material of the fiber bundle is glass fiber, quartz fiber, carbon fiber, kaolin fiber or mullite fiber. A three-dimensional fiber preform weaving method as described in item 1 of the scope of the patent application, wherein the step (C) to determine whether the stacking height meets the product requirements ranges from 0.5 to 100.0 cm.

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