How to see the quality difference of carbon fiber pipes?

Carbon fiber pipes have the advantages of light weight, high strength and flexible design, and are widely used in aviation, civil, industrial and medical fields. With the expansion of the domestic carbon fiber market, more and more companies enter the carbon fiber field, and the quality of carbon fiber products is uneven. , How to distinguish the quality difference of carbon fiber pipes needs to be considered from multiple angles.

First, lightweighting is the main purpose, but it is not just about lightweighting.

For example, carbon fiber UAV’s boom, landing gear and other components, after using carbon fiber UAV components, not only reduces the weight of the UAV, but also greatly increases the load, flight time and range of the UAV, and the demand for carbon fiber pipes Mainly concentrated in the fields of drones, automotive rail transit, industrial machinery, etc., and its original intention is to reduce weight.

Looking at the entire drone market, we will find that lightweighting is an intuitive purpose, but ultimately we must improve the performance of drones through lightweighting. In fact, in addition to lightweighting, because the linear expansion coefficient of carbon fiber materials is close to ” 0”, in some thermally sensitive areas, temperature changes will have a certain impact on the measurement accuracy, so high-end aerospace instruments need to pay special attention to this, and the low creep of carbon fiber tubes can meet this demand.

Therefore, lightweight is the main purpose of the application of carbon fiber pipes, but it cannot be limited to this point. The physical and chemical properties of carbon fiber pipes are good, and the overall performance of the equipment is achieved through it.

Second, strength is an inevitable indicator, but not an indicator.

The application of carbon fiber pipes starts from replacing traditional metal pipes. Therefore, carbon fiber pipes are required to have the strength and stiffness of traditional metal pipes. The strength of high-strength carbon fibers can reach more than 3000 MPa, which is 6-12 times that of steel. The strength of ordinary carbon fibers is far Better than traditional metal materials, therefore, the performance of carbon fiber pipes in terms of strength performance is not expected.

Even so, it does not mean that carbon fiber pipes can replace metal pipes, but should be analyzed from the specific requirements of practical application objects, such as mechanical rollers have higher requirements for dynamic balance indicators. As a part of the rotating body of the whole machine, as part of the roller shaft, if the quality of carbon fiber pipe is slightly defective or there is deviation in the process of processing and assembling, it will cause the centrifugal force inertia force to be difficult to offset, resulting in vibration and noise, and accelerated bearing wear. Shorten equipment life.