CN106985417A - A kind of carbon fiber weaves the interface connecting method of multiple tube - Google Patents

Abstract

The invention relates to an interface connection method for a carbon fiber braided composite pipe, which includes the following process steps: (1) selecting different joints according to the application scene; (2) connecting the joint with the braided mandrel; (3) solidifying and forming the overall carbon fiber braiding ; (4) Take out the finished product from the mold. When the present invention adopts a cylindrical joint with needles, various external forces of the carbon fiber braided composite pipe can be transmitted to the entire joint through dense fine needles through the carbon fiber, thereby maintaining the connection strength of the carbon fiber braided composite pipe well; the polygonal drum joint is adopted At this time, the force on the carbon fiber composite tube can act on the polygonal plane through the carbon fiber and resin, and can withstand a certain torsion.

Description

A kind of interface connection method of carbon fiber braided composite pipe

【Technical field】

The invention relates to an interface connection method, in particular to an interface connection method for a carbon fiber braided composite pipe, and belongs to the technical field of textile machinery.

【Background technique】

Carbon fiber composite pipe is a material with excellent performance. It has high strength, high quality and light weight, and is often made into a thin and light tubular structure. When carbon fiber composite pipes are used, adhesives are often used to bond pipe fittings. However, many problems have arisen in the way of bonding, such as: 1. The strength of the bonding method is low; 2. The quality of the bonding is uneven, and it is difficult to guarantee its quality and consistency; 3. It cannot be disassembled and difficult to maintain and replace; 4. . Poor scalability.

Therefore, in order to solve the above-mentioned technical problems, it is necessary to provide an innovative carbon fiber braided composite pipe interface connection method to overcome the above-mentioned defects in the prior art.

【Content of invention】

The object of the present invention is an interface connection method of carbon fiber braided composite pipe, which solves the problem that the current carbon fiber composite pipe is difficult to connect.

In order to achieve the above object, the technical solution adopted by the present invention is: a method for interface connection of carbon fiber braided composite pipe, which includes the following process steps:

(1) Choose different connectors according to the application scenario;

(2) Connect the joint to the braiding mandrel;

(3) Integral carbon fiber weaving and solidification forming;

(4) Remove the finished product from the mold.

The interface connection method of the carbon fiber braided composite pipe of the present invention is further as follows: in step (2), the joint is specifically a cylindrical joint with needles, on which fine needles are arranged.

The interface connection method of the carbon fiber braided composite pipe of the present invention is further as follows: step (3) specifically: first connect the cylindrical needle joint and the mandrel as a whole; overall surface.

The interface connection method of the carbon fiber braided composite pipe of the present invention is further as follows: in step (2), the joint is specifically a polygonal drum-shaped joint.

The interface connection method of the carbon fiber braided composite pipe of the present invention is further as follows: step (3) is specifically: firstly, the polygonal drum-shaped joint and the mandrel are connected as a whole; overall surface.

The interface connection method of the carbon fiber braided composite pipe of the present invention is further as follows: step (4) is specifically: put the braided mandrel and the joint into the curing mold; check the airtightness of the mold; then pass the resin into the bottom of the mold, Use a vacuum pump above to evacuate; while evacuating, use a de-resin bucket to remove resin from the pipes.

Compared with the prior art, the present invention has the following beneficial effects:

1. The interface connection method of the carbon fiber braided composite pipe of the present invention uses a cylindrical needle joint, and when the carbon fiber composite pipe is braided, the fine needles on the joint can pass through the mesh of the carbon fiber braid. Because of the tension in the yarn during weaving, the yarn wraps tightly around the thin needles. After the carbon fiber braided composite pipe is solidified and shaped, various external forces of the carbon fiber braided composite pipe can be transmitted to the entire joint through dense fine needles through the carbon fiber, so as to maintain the connection strength of the carbon fiber braided composite pipe well.

2. The interface connection method of the carbon fiber braided composite pipe of the present invention uses a polygonal drum joint, through carbon fiber weaving on the surface of the interface, because of the tension of the weaving, a close-fitting fiber braided reinforcement can be formed at the interface. For the axial force, because of the drum-shaped structure of the interface, the force on the carbon fiber composite tube is converted into the tension of the braid and acts on the inclined surface of the drum. Because of the extremely high axial strength of carbon fiber, its axial deformation is extremely small, so it can withstand a good force at the interface. As for the rotational torsion, because of the polygonal shape, the force on the carbon fiber composite tube acts on the polygonal plane through the carbon fiber and resin. Before the stripping of carbon fiber and resin, the interface cannot be separated from the carbon fiber composite pipe, because the bonding force between carbon fiber and resin is very strong, so the interface can withstand a certain torque.

【Description of drawings】

Fig. 1 is a flow chart of the interface connection method of the carbon fiber braided composite pipe of the present invention.

Figure 2-1 is a schematic diagram of a cylindrical connector with needles.

Figure 2-2 is a schematic diagram of a polygonal drum joint.

Figure 3-1 is a schematic diagram of knitting a cylindrical joint with needles.

Figure 3-2 is a partial enlarged view of A in Figure 3-1

Fig. 4 is a schematic diagram of polygonal drum joint weaving.

Figure 5 is a schematic diagram of the curing process.

Figure 6 is a schematic diagram of the finished product.

【detailed description】

Please refer to the accompanying drawings 1 to 6 of the specification, the present invention is an interface connection method for a carbon fiber braided composite pipe, which includes the following process steps:

(1) Choose different connectors according to the application scenario;

(2) Connect the joint to the braiding mandrel;

(3) Integral carbon fiber weaving and solidification forming;

(4) Remove the finished product from the mold.

The present invention designs two types of joints of carbon fiber braided composite pipes: a cylindrical joint 1 with needles and a polygonal drum joint 2 .

When a cylindrical needle joint 1 is used, a thin needle 11 is arranged on the cylindrical needle joint 1, and the thin needle on the joint can pass through the mesh of the carbon fiber braid when the carbon fiber composite tube is woven. Because of the tension in the yarn during weaving, the yarn wraps tightly around the thin needles. After the carbon fiber braided composite pipe is solidified and shaped, various external forces of the carbon fiber braided composite pipe can be transmitted to the entire joint through dense fine needles through the carbon fiber, so as to maintain the connection strength of the carbon fiber braided composite pipe well.

The knitting method of the cylindrical needled joint 1 is as follows: first, the cylindrical needled joint 1 and the mandrel 5 are connected as a whole; secondly, the high-strength and low-elasticity carbon fiber 3 is densely wrapped on the whole surface by using the knitting machine 4 .

When the polygonal drum joint 2 is used, through the carbon fiber weaving on the surface of the interface, because of the tension of the weaving, a close-fitting fiber braided reinforcement can be formed at the interface. For the axial force, because of the drum-shaped structure of the interface, the force on the carbon fiber composite tube is converted into the tension of the braid and acts on the inclined surface of the drum. Because of the extremely high axial strength of carbon fiber, its axial deformation is extremely small, so it can withstand a good force at the interface. As for the rotational torsion, because of the polygonal shape, the force on the carbon fiber composite tube acts on the polygonal plane through the carbon fiber and resin. Before the stripping of carbon fiber and resin, the interface cannot be separated from the carbon fiber composite pipe, because the bonding force between carbon fiber and resin is very strong, so the interface can withstand a certain torque.

The weaving method of the polygonal drum-shaped joint 2 is as follows: first, the polygonal drum-shaped joint 2 and the mandrel 5 are connected as a whole; secondly, the braiding machine 4 is used to densely wrap the high-strength and low-elasticity carbon fiber 3 on the surface of the whole.

The step (3) specifically includes: putting the braided mandrel and the joint into the curing mold 7 . Check the airtightness of the mold 7. The resin 6 is then passed into the lower part of the mold, and a vacuum is drawn above using a vacuum pump 9 . When vacuuming, use the resin removal bucket 8 to remove the resin in the pipeline to prevent the resin from entering the vacuum pump 9.

The specific implementation above is only a preferred embodiment of this creation, and is not intended to limit this creation. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this creation should be included in this creation. within the scope of protection.

Claims (6)

1. a kind of carbon fiber weaves the interface connecting method of multiple tube, it is characterised in that：Comprise the technical steps that：

（1）Different joints is selected according to application scenarios；

（2）Joint is connected with braiding mandrel；

（3）Overall carbon fiber Woven and set shaping；

（4）Finished product is taken out in the demoulding.

2. carbon fiber as claimed in claim 1 weaves the interface connecting method of multiple tube, it is characterised in that：Step（2）In, connect Head is specially cylinder shape belt adapter, and fine needle is disposed with thereon.

3. carbon fiber as claimed in claim 3 weaves the interface connecting method of multiple tube, it is characterised in that：Step（3）Specifically For：Cylinder shape belt adapter is connected with mandrel first and is integral；Secondly the carbon fiber of high strength, low elasticity is caused using braider Close looping is to integral surface.

4. carbon fiber as claimed in claim 1 weaves the interface connecting method of multiple tube, it is characterised in that：Step（2）In, connect Head is specially polygon drum type joint.

5. carbon fiber as claimed in claim 4 weaves the interface connecting method of multiple tube, it is characterised in that：Step（3）Specifically For：It will be connected and be integral with mandrel for polygon drum type joint first；Secondly braider is used by the carbon fiber of high strength, low elasticity Fine and close looping is to integral surface.

6. carbon fiber as claimed in claim 1 weaves the interface connecting method of multiple tube, it is characterised in that：Step（4）Specifically For：Mandrel and joint after braiding is put into curing mold；Check the air-tightness of mould；Then resin is passed through under mould Side, is up vacuumized using vavuum pump；When vacuumizing, the resin removed except resin barrel in pipeline is used.