The carbon fiber tube is light in weight and high in strength. It can be applied to different parts of the drone body during design and assembly, such as the arm and wing frame. Compared with aluminum alloy material, it can increase the weight reduction effect by 30%, which can improve the aircraft, endurance and increase load capacity. The carbon fiber material itself has high tensile strength, energy absorption, shock resistance, and good corrosion resistance, which also extend the service life of the UAV. Through research on its own customers, we found that most consumer-grade aerial photography drones and agricultural plant protection drones use carbon fiber tubes as the main structure, which can not only reduce the weight of the drone, increase the endurance, but also increase the Human machine life.

Carbon fiber reinforced composite materials actually use a lot of carbon fibers, arranged in a certain direction, and then tightly connected by resin or other bonding materials. For example, as shown in the figure below, the cylinders are carbon fibers, and these cylinders are filled with resin in the middle. The distribution density of these fibers directly affects the final material properties. Because of this, we can control the final performance of carbon fiber materials by adjusting the fiber volume fraction, which is the fiber volume ratio. Simply, the denser the fiber, the more fibers per unit volume, and the higher the strength along the fiber direction; conversely, the sparser the fiber, the fewer fibers per unit volume, and the lower the strength of the final carbon fiber material. For carbon fibers used in market, the arrangement of fibers can be either in a single direction or in multiple directions. Of course, the most commonly used one is multi-directional cross, which is the appearance of carbon fiber that we usually use. For example, this is a single direction. Below is a multi-directional cross, the appearance of our common carbon fiber is this two-way cross texture. The original carbon fiber material is like this, in fact, it is more like cloth, which can be bent and rolled into a roll.

Principle of Fiber Orientation Fiber orientation has a significant impact on the interaction between the CFRP workpiece and the tool interface, and chip formation is closely related to fiber orientation. The fracture of the contact surface between the CFRP workpiece and the tool is caused by the pressure exerted by the tool tip. In terms of multiple fiber orientations, there are 3 cutting mechanisms: (1) The fiber breaks along the direction of the contact surface between the fiber and the matrix, that is, the fiber orientation is 0°. (2) When the cutter shears, the direction is perpendicular to the fiber axis, and the fiber orientation is 75°. (3) The fiber orientation is 90° or even a negative angle. The fiber direction angles of 30°, 60°, and 90° are the most critical directions. They will cause large cutting forces, concentrated wear and workpiece damage. By increasing the tool clearance angle, you can Effectively reduce the feed thrust.

The use of carbon fiber board knives CFRP is a difficult-to-machine material, mainly because it wears very quickly to the tool. The wear mechanism of the tool during the machining process is: when the workpiece is processed on the tool, the two surfaces are in large contact. During the machining process, long-term wear and vibration will cause the hard particles on the tool to occasionally separate, thus forming the so-called Tool wear. The wear type can be roughly divided into tool damage and wear. According to the location of wear, wear can be divided into tool tip wear, tool side wear, tool edge damage and edge wear. There are many factors that affect tool wear, mainly including: machining process parameters, tool geometry and materials. In the CFRP cutting process, process parameters (such as cutting speed, feed rate, fiber orientation, etc.) will significantly affect tool wear. Generally speaking, an increase in cutting speed will increase side wear. Tool geometry and material have a significant impact on machined surfaces, chip formation, cutting forces and tool wear.

What carbon fiber material? High-strength, high-modulus fiber with carbon content above 90%. High temperature resistance ranks first among all chemical fibers. It is made of acrylic fiber and viscose fiber as raw materials, after high temperature oxidation and carbonization. It is an excellent material for manufacturing high-tech equipment such as aerospace and aviation. A special fiber composed of carbon elements. It has the characteristics of high temperature resistance, friction resistance, electrical conductivity, heat conduction and corrosion resistance. The appearance is fibrous, soft, and can be processed into various fabrics. Because of its graphite microcrystalline structure is preferably oriented along the fiber axis, it has a high Strength and modulus. Carbon fiber has a low density, so its specific strength and specific modulus are high. The main purpose of carbon fiber is to compound with resin, metal, ceramic and carbon as a reinforcing material to make advanced composite materials. Carbon fiber reinforced epoxy resin composites have the highest specific strength and specific modulus among existing engineering materials.

Difficulties in processing carbon fiber composite materials During the processing of carbon fiber reinforced composite materials (CFRP), the matrix and fiber have a relatively complicated internal interaction, which makes their physical properties quite different from metals. The density of CFRP is much smaller than that of metals, and the strength is greater than that of most metals. Because of the unevenness of CFRP, fiber pull-out or detachment of matrix fibers will often occur during processing; CFRP has higher heat resistance and wear resistance, which makes it more demanding on equipment during processing, because A large amount of cutting heat generated during the production process is more serious for equipment wear. At the same time, the continuous expansion of its application fields, the requirements are becoming more and more refined, the requirements for the applicability of materials, and the quality requirements for CFRP are becoming more and more stringent, which also causes the processing cost to rise.

Carbon fiber tube Carbon fiber tube, also known as carbon fiber tube, also known as carbon tube, carbon fiber tube, is made of carbon fiber composite material pre-impregnated with styrene-based polyester resin by heating, curing and pultrusion (winding). In the manufacturing process, various profiles can be produced through different molds, such as: carbon fiber round tubes of different specifications, square tubes of different specifications, sheets of different specifications, and other profiles: 3K can also be packaged during the production process Surface packaging beautification and so on. Features of carbon fiber tube 1. High tensile strength: The strength of carbon fiber is 6-12 times that of steel and can reach more than 3000mpa. 2. Low density and light weight. The density is less than 1/4 of steel. Carbon fiber tube has the advantages of high strength, long life, corrosion resistance, light weight, low density, etc. It is widely used in kites, aviation model airplanes, lamp brackets, PC equipment shafts, etching machines, medical equipment, sports equipment and other mechanical equipment. Dimensional stability, electrical conductivity, thermal conductivity, low coefficient of thermal expansion, self-lubrication, energy absorption and shock resistance, and a series of excellent properties. And it has high specific modulus, fatigue resistance, creep resistance, high temperature resistance, corrosion resistance, wear resistance, etc. The disadvantage is that it has conductivity (Ωcm-1.5×10-3), and the advantage is that it has very good tensile strength (for example, calculated in units of 12000 filaments, its tensile strength is kg/mm2-400). The amount of carbon fiber used in the production of carbon fiber tubes directly determines its mechanical performance and value. Carbon fiber tube has the characteristics of light weight, solidity and high tensile strength, but special attention should be paid to electricity prevention when using it.

Press nuts of different materials When installed on the P.C board, the splines can be tightly connected with the panel. Internal thread fasteners for assembling pcb boards. Thread size #2 to #10 and m2 to m5 In the process of installation and pressure, you need to pay attention to: 1. Punch out or drill an appropriate size mounting hole on the circuit board. 2. Place the handle of the fastener in the hole of the mounting plate as shown in the figure. 3. Keep the upper and lower molds in parallel and apply squeezing force until the handle of the product completely enters the plate.

Why use carbon fiber? 1) Lightweight Carbon fiber is 5 times lighter than steel (ASTM-A1008) and almost 2 times lighter than aluminum when comparing similar sized pieces. 2) High Strength & Stiffness Carbon fiber reinforced polymer (CFRP) has the highest specific strength and modulus (stiffness) per density compared to metal, plastic and wood. 3) Resistance to Corrosion & Chemicals The epoxy resin is inert and not susceptible to corrosion or rust, and the carbon bonds in the fibers are extremely strong and resistant to oxidization. 4) Low Thermal Expansion When metal is exposed to heat, it will expand and weaken which can cause issues and possible failure of the part. Carbon fiber has low thermal expansion. 5) Low Thermal Conductivity Metal acts as a conductor, steel more than aluminum, which can transmit or radiate heat to its surroundings and cause heat soak. Carbon fiber has low thermal conductivity. 6) RF Shielding Carbon Fiber works well to attenuate, or block radio frequency waves, protecting your devices from scanners or people trying to access your data.

In standard carbon fiber composite parts, such as sheets, tubes, angle bars, ribs, and even complex molded shapes, the thickness includes many thin material layers or layers. Depending on the application, a single carbon fiber laminate can be unidirectional (that is, all fibers are aligned in a single direction) or multidirectional (for example, stitched single or woven fibers). The most common multidirectional cord layer is woven, with 50% of the fibers arranged longitudinally and the remaining 50% horizontally. In this way, the layers are stacked on top of each other to build the final carbon fiber components using fibers in both directions. This type of composite, called orthotropy, will have maximum strength in the fiber direction (in this case, 0o and 90o directions, known as 0max 90 laminates) and in any off-axis direction (for example, 45o axis). For a given application, if the composite part is expected to have an off-axis bending or torsional load, the fiber should be placed in the off-axis direction. Such laminated materials are called quasi-isotropic because they begin to approach the homogeneous (or isotropic) properties of homogeneous materials, such as non-fiber reinforced plastics or metals. At half the weight of aluminum, carbon fiber parts provide a great alternate to metal in many instances where portability, low thermal expansion, and resistance to yielding are major design drivers. For example, a carbon fiber part can typically bend almost up to the point of fracture without any yielding (i.e. permanent deformation). In applications where large elastic deflections with minimal energy loss is important, carbon fiber is often the best option.