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April 09, 2021

How is the carbon fiber tube connected to the metal parts?

As the basic products of carbon fiber products, Carbon Fiber Tubes are widely used in various fields such as aerospace, mechanical equipment, medical equipment and so on. Carbon Fiber Tube is often used as a load-bearing structure in the process of use, and will be connected with metal parts.

Carbon fiber tube and metal parts of the common ways are: bonding, mechanical connection, mixed connection, embedded, and so on, boshi as a custom carbon fiber enterprises, to explain these connections.

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1. gluing

The bonding of carbon fiber tube is to use epoxy structural adhesive to connect the carbon fiber tube to the parts. It is necessary to remove the surface impurities when bonding, the latter can also be used to improve the surface roughness with chemical reagents, can consolidate the connection, with a small number of parts, light structure, high connection efficiency, anti-fatigue, vibration reduction, anti-corrosion and so on. Carbon fiber tube is not metal, but conductive, when it uses structural glue and metal connection, the two materials of chemical corrosion path is blocked, can achieve the effect of corrosion protection.

2. Mechanical connection

Mechanical connection points can transfer a larger load, easy to disassemble, inspection and maintenance, to ensure the safe and effective use of the structure. However, the hardness of carbon fiber is large, belongs to difficult-to-process materials, there are some difficulties in mechanical processing. The mechanical connection mode of carbon fiber includes screw connection and Rivet Connection, among which screw connection can be divided into bolt connection, screw connection and fastening screw connection. This method can transfer large load, good peel-off resistance, allow disassembly after assembly, less environmental impact, no adhesive curing generated by the residual stress. Disadvantages are increased weight and stress concentration.

3. Mixed connections

Is in the connection, the use of both mechanical connection and bonding methods, so that the carbon fiber tube and metal links between the closer, more durable products.

4. Prebury

Pre-embedding is in the carbon fiber pipe and carbon fiber products prepreg layer, the metal parts on the pre-preg location, and then put into the mold for heating and pressure curing.


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