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Company Name: Hobby Carbon CNC Technology(Shenzhen) Limited

Business Type: Manufacturer

Main Products: Carbon Fiber Sheets , Carbon Fiber Tubes , Carbon Fiber CNC Cutting , CNC Aluminum Parts , Aluminum Fasteners , Titanium Fasteners

Export Percentage: 91% - 100%

Year Established: 2015

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.


Why did press nut become so popular? Principle of use: By pressing the wedge-shaped thread stopper, it can produce greater friction with the screw thread of the bolt, so as to ensure that the bolt and the nut will not undergo relative displacement. The non-supporting surface of the nut body is provided with a nylon ring to increase the friction between the bolt and the nut and prevent the bolt from loosening. Advantage: 1. It will not loosen under vibration and lateral load, realizing the purpose of preventing loosening; 2. The specification of a press-threaded anti-loosening nut is matched with ordinary standard bolts, no additional bolts are required; 3. The angle between the threads is set to 30°, which reduces the phenomenon of stress concentration and can avoid the fatigue damage of the spiral. Application: Areas that need to be used in connection, such as daily buildings, mechanical fields, and drone manufacturing.


The difference between 6061 aluminum and 7075 aluminum 1. Composition Although the alloys that make up 6061 and 7075 are similar, the actual amounts of alloy formulations for each component vary greatly. The composition of 6061 aluminum includes magnesium, silicon, iron, copper, zinc, titanium, manganese, chromium, etc. The composition of 7075 aluminum is composed of the same alloy, but is different from the contents of magnesium, silicon, iron, copper, zinc, titanium, manganese, and chromium, as well as other metals that make up the series. 2. Properties The properties of 6061 aluminum include corrosion resistance, weldability, medium and high strength, and good practicality. 7075 aluminum has high strength, stress resistance, practicality and improved resistance to stress corrosion. 3. Strength In terms of strength, 7075 is stronger than steel, and the strength of permanent bending deformation of aluminum is stronger than 6061. 4. Different prices: 6061 is the most common aluminum material, with light weight, good strength and average price. 7075 is the lightest and strongest aluminum material, and its price is slightly more expensive than 6061. 5. Different practicality: 7075 contains a high proportion of other metals, so welding and handling are more difficult, so it is generally not used as a frame material. Because 6061 has a lower proportion of other metals, it can be shaped and treated to increase its strength and reduce its wind resistance. It can even be drawn three times to reduce weight. The choice of 6061 aluminum or 7075 aluminum depends on its application most of the time, and sometimes is affected by personal preferences.


How to cut carbon fiber board? 1.Carbon fiber composites have excellent properties and are currently widely used in many manufacturing fields. Its main features are as follows: (1) High strength and high efficiency Tensile strength is several times more than ordinary steel, elastic modulus is better than steel, has excellent creep resistance, corrosion resistance and shock resistance. (2) Light weight and good flexibility Carbon fiber has high specific strength, only 1/5 of the quality of steel, has high toughness, can be coiled, can be supplied in a larger length without overlapping. (3) Convenient construction and easy construction quality assurance Material does not need to be pre-processed, the process is convenient, and the plates are allowed to cross. (4) Good durability and corrosion resistance Resistant to acid, alkali, salt and atmospheric environment corrosion, no regular maintenance is required. 2.Cutting method of carbon fiber board: (1)Mechanical cutting. Carbon fiber board generally uses grinding wheel cutting machine. When cutting the grinding wheel, it is necessary to maintain a very high speed to avoid burrs. For precision machining, the alloy knife of the machine tool (such as pineapple knife) can also be used for cutting. However, the carbon fiber board has a great loss on the tool. The worn tool has many burrs, poor finish, and low efficiency. (2)Water cutting. The method of water cutting is also called waterjet, which is made by spraying water under pressure. This method is suitable for batch processing and simple operation, but the quality requirements for water cutting machines are increased, and poor quality machines are prone to cutting burrs. (3)laser cutting. The laser cutting machine needs to increase the power to ensure the cutting effect. The ordinary low-power laser cutting machine teaches the cutting effect of carbon fiber products poorly. Laser-cut carbon fiber board will have burn marks on the edge. (4)Ultrasonic cutting. Ultrasonic cutting is the use of ultrasonic energy to cause the material to be cut to produce a fine fracture to achieve the cutting effect. The carbon fiber board cut by the ultrasonic cutting machine is clean and tidy, and the damage to the carbon fiber is relatively small. If the batch is processed, the cost is higher. Choose the appropriate cutting method according to the actual needs such as the quantity, thickness, accuracy and other needs to be processed. For the hollow engraving and processing of carbon fiber boards, CNC engraving machines and other cnc equipment are generally used.


Why titanium screws are more expensive than other screws Do you know why the price of titanium alloy screws is always higher than that of other screws of the same specification? The reason is closely related to the performance and application of titanium. The advantages of titanium screws are mainly reflected in the following aspects: 1. High specific strength. The density of titanium is 4.51g/cm ³, which is higher than that of aluminum and lower than that of steel, copper and nickel, but its strength is much higher than that of other metals. So screws made of titanium alloy are not only light but also strong. 2. Good corrosion resistance. Titanium and titanium alloys are stable in many media, and titanium alloy screws are suitable for a variety of corrosive environments. 3. Good heat resistance and low temperature resistance. Titanium alloy screw can work normally at high temperature of 600 ℃ and low temperature of minus 250 ℃, and can keep its shape unchanged. 4. Non-magnetic and non-toxic. Titanium is a non-magnetic metal and will not be magnetized in a large magnetic field. It is not only non-toxic, but also has good compatibility with the human body. 5. Strong anti-damping performance. Compared with steel and copper metal, titanium has the longest vibration attenuation time after being subjected to mechanical vibration and electrical vibration. This performance can be used as vibrating film for tuning forks, medical ultrasonic crusher vibration components and advanced audio loudspeakers. Relatively expensive metal materials such as titanium alloy are mainly used in high-end precision industries such as nuclear industry, electronic equipment, medical industry, aerospace and so on. However, with the development of titanium industry, titanium alloy screws will no longer be limited to high-end precision industries, but will go deeper into people's daily life.


Do you really understand carbon fiber? Carbon cloth The first thing to say is the relatively obvious carbon cloth. Carbon fibers are very thin fibers. To use a carbon fiber material, you must first make these fibers into a cloth before they can be laid on top of each other. This is also known as carbon fiber cloth. Unidirectional cloth Many people think that unidirectional cloth is not good and cheap, but it is actually not the case at all. Carbon fibers are bundled, and the carbon fibers are arranged in a row in one direction, which is a unidirectional cloth.This is just the arrangement of carbon fibers, and it has nothing to do with the quality of the carbon fiber material itself. Because the unidirectional cloth is ugly, there is a marble pattern. But few people know how the marble pattern came about. In fact, it is just the appearance treatment. The crushed carbon fiber is made to the surface of the manufactured product, and then coated with resin, and vacuumed, so that the crushed slag sticks to it, which is called the marble pattern. This appearance treatment only achieves aesthetic effects and does not play any practical role in terms of material strength. Woven cloth Woven cloth is often said to be 1K, 3K, 12K carbon cloth, and carbon fiber itself is also okay. 1K means that 1000 carbon fibers are made into one piece and then weaved; 3K is 3,000 and 12K is 12,000, which is very easy to understand.


How to make carbon fiber tube Due to the high hardness and light weight of carbon fiber materials, more and more people choose carbon fiber materials to make pipes. According to the shape of the tube, it can be divided into round tube, square tube, octagonal tube, oval tube, shape tube ect. No matter what shape tube you want to make,make the mold is essential The production cost of the round tube is relatively low, because the production of the round tube only needs to open an inner mold to achieve a higher precision effect, while other shaped tubes (such as a square tube, a curved tube etc) usually need to open the inner and outer mold together to achieve high precision and no burr in the tube. (If the the customer's have not high requirement about the internal dimensions, we usually advise customers to only make the outer mold to save costs) Next, let's talk about how to make carbon fiber tubes. Here to tell you about the most common rolling production process 1. First cut the carbon fiber prepreg according to the specifications of the required pipe and select the appropriate inner core mold (in the selection of the core mold raw material, it is best to choose a metal material with good rigidity, such as steel and hard aluminum) 2. A layer of release agent is applied to the mold, and then the carbon fiber is pre-impregnated by the hot pressing of the coiler to be softened, thereby uniformly rolling onto the mold. When all the prepreg is rolled, the surface is wrapped. The upper layer of OPP tape is finally sent to the oven and solidified at high temperature. In addition, the blank state of the carbon fiber tube is obtained, and the OPP tape is removed, and then the surface of the carbon fiber tube is ground and then painted. 3. The final carbon fiber tube is obtained by cutting off the uneven portions at both ends. The above is a simple summary of the carbon fiber tube production steps, but in practice, there are many places that we need to pay attention to, such as the material of the core mold, the design of the core mold, the design parameters in the molding process, some demoulding Points and so on.


The characteristics and selection of oxidation of 7075 aluminum alloy and 6061 aluminum alloy 7075 aluminum is a forging alloy. It is synthesized from a variety of materials. Due to the different chemical reactions of each material during oxidation, the oxidation effect is not uniform, and there may even be some pitting. However, the advantages of the 7075 cannot be ignored. Its strength is far superior to that of any mild steel. It is often used in the manufacture of aircraft parts and other products requiring high strength and corrosion resistance. It is one of the most powerful alloys on the market. . What material is most suitable for anodizing CNC aluminum alloys? We have established more than ten years of processing experience, and have done anodizing of various materials. We have drawn from experience that the 6 series of aluminum alloys, such as 6061 aluminum, have excellent oxidation effect and are very popular on the market. A popular anodized material. Special reference for the following oxidation effects for your reference: Oxidation effect: 1>5>6>3>7 Hardness: 7>6>5>3>2 If the customer's product is a simple appearance, mainly looking at the surface effect, we will advise the customer to use 6061 material processing to ensure its oxidation effect; If the customer's product is functional, and the performance and strength of the product are valued, we will explain the characteristics and surface effects of the 7075 material to the customer in advance, so that the customer can understand and seek the consent of the customer before proceeding to the next step.


Carbon fiber texture and performance Plain weave The plain weave carbon fiber board looks symmetrical and has a small checkerboard-like appearance. In this weaving, the tow is knitted in an up / down pattern. The spacing between the interlaced tows is small, which makes the plain weave very stable. Fabric stability is the ability of a fabric to maintain its weaving angle and fiber orientation. Due to its high stability, plain weave is not suitable for stacks with complex contours, it will not be as flexible as some other weaves. Generally, plain weaves are suitable for the appearance of flat plates, pipes and 2D curvilinear structures. Twill weave Twill is a weave between plain weave and satin weave. Twill has good flexibility, can be formed into complex contours, and maintains fabric stability better than satin weave, but not as good as plain weave. If you follow a tow in a twill weave, it will pass through a certain number of tows and then the same number of tows. The top / bottom pattern creates the appearance of a diagonal arrow, called a "twill line." Compared to plain weave, the longer the distance between the drag staggers means less crimp and less potential stress concentration. Unidirectional cloth Unidirectional cloth is also called UD cloth, all fibers are facing the same direction. This gives unidirectional (UD) fabrics some high strength advantages. UD fabrics are not woven fabrics and there are no crimped interwoven tows. Only highly oriented continuous fibers can increase strength and stiffness. Another benefit is the ability to control product strength by adjusting the layup angle and layup ratio. A good example is the use of unidirectional cloth to optimize the ply structure of a bicycle frame to adjust performance. The frame must maintain stiffness and stiffness in the area of the bottom bracket to transmit the driver's power to the wheels, but the frame also needs to have some flexibility and flexibility. With a unidirectional cloth, you can choose the precise direction of the carbon fiber to get the strength you need. One of the main disadvantages of unidirectional cloth is poor operability. Unidirectional cloth tends to spread out easily during the layup process because it does not have interwoven fibers to hold it together. If the fibers are placed incorrectly, it is almost impossible to reposition them correctly again. One-way cutting can also cause problems. If any fiber is pulled up at a specific place, those loose fibers will be pulled all the way to the entire cloth surface. In general, if a unidirectional cloth is selected for lamination, plain, twill, and satin weave fabrics are used for the first and last layers to help improve processability and part durability. In the middle layer, a unidirectional cloth is used to precisely control the strength of the entire component.


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