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.

How to deal with difficult processing materials? This is because it relatively poor machinability,such as: high hardness and high strength, high plasticity and high toughness, low thermal conductivity, low plasticity, high brittleness, and too active chemical properties, the cutting force is high during cutting and the cutting temperature is high. Chips are difficult to control, work hardening and tool durability are low. Using new materials Although the hardness of cubic boron nitride cutter is slightly lower than that of diamond, it is much higher than other high hardness materials, and its thermal stability is much higher than that of diamond, which can reach above 1200 °C, suitable for high temperature dry cutting. Another advantage is that it is chemically inert. The performance of high-speed steel cutters is not advanced enough. On the base of high-speed steel, a thin layer of wear-resistant material (usually TiN) is coated by physical vapor deposition (PVD) method, which can significantly improve tool life and surface quality, and reduce cutting force. Carbide tools are powder metallurgy products of carbides (WC, TiC, etc.). According to the size of the crystal grains, it can be divided into ordinary hard alloy, fine-grained hard alloy and ultra-fine grained hard alloy; it can be divided into tungsten-cobalt (YG), tungsten-cobalt-titanium (YT) and added according to chemical composition. Rare carbides (YW). Tungsten-cobalt-titanium (YT) tools have a strong affinity with titanium alloys. Diamond tools have the advantages of extremely high hardness and wear resistance, sharp edge, low friction coefficient, high modulus of elasticity, high thermal conductivity and low affinity with non-ferrous metals. Diamond tools are suitable for finishing and super finishing of difficult-to-machine materials. The heat resistance temperature of diamond is only 700~800 °C, and it must be fully cooled and lubricated during processing. The ceramic tool material is obtained by separately adding carbides, nitrides, borides, oxides, and the like to the alumina and silicon nitride substrates. Ceramic tools have higher temperature performance than hard alloys and are therefore suitable for high speed cutting. The fracture toughness and thermal shock resistance of Si3N4 based ceramic tools are higher than those of Al2O3 based ceramic tools, which are suitable for high speed cutting of cast iron.

How to calculate the cost of carbon fiber cutting? I believe many customers want to ask this question.Today we will come to answer them. 1. First of all, we will check the drawings of individual products sent by customers. Including checking whether the drawing is in inches or metric (avoiding wrong size cutting), and check whether the drawings are broken or the problem of repeated lines exists.Then check whether the it have 90 degree angle (cutting drawings require a certain R angle).If there is a problem, our engineer will directly help the customer to correct the drawings. 2. Verify with customers the direction and requirements of the product. Determine the layout direction of this part and the choice of plate. (Glass fibre board, UD direstion board, 3K carbon fiber board, all 3K layer carbon fiber board, Kevila board, etc.) 3.help customer layout the drawing 4. If customers need more quantity of the same thickness, we advice to fill a whole plate (400*500mm or 500*600mm), so that it can reduce the cost 5. Above is common cutting, in addition, many customers have chamfer, countersunk hole and other requirements for a single part, there are secondary processing and need to be quoted separately. Finally, customers can choose to let us quote by piece or by the layout of the whole board.

Selection of milling cutter blades 1. For finishing milling, the best choice is grinding blade. This kind of insert has better dimensional accuracy, so the positioning accuracy of the cutting edge in milling is higher, and better processing accuracy and surface roughness can be obtained. In addition, the development trend of grinding milling inserts used in finishing is to grind out chip grooves to form large positive rake cutting edges, which allow the inserts to be cut at small feed and small cutting depth. When carbide blades without sharp rake angle are processed by small feed and small cutting, the tool tip rubs against the workpiece and the tool life is short. 2. It is more appropriate to select pressing blade in some processing occasions. Sometimes it is also necessary to choose grinding blade. The best choice for rough processing is the compacted blade, which can reduce the processing cost. The dimension accuracy and edge sharpness of the compacted blade are worse than those of the grinding blade, but the edge strength of the compacted blade is better, and it can withstand impact and larger cutting depth and feed during roughing. Compressed blades sometimes have chip grooves on the rake face, which can reduce cutting force and friction with workpieces and chips, and reduce power demand. 3. However, the surface of the pressed blade is not as close as that of the grinded blade, and the dimension accuracy is poor. The height of each tool tip on the milling cutter body is quite different. Because the pressing blade is cheap, it is widely used in production. 4. Grinded large rake blades can be used to milling viscous materials (such as stainless steel). Through the shearing action of the sharp blade, the friction between the blade and the workpiece material is reduced, and the chip can leave from the front of the blade quickly. 5. As another combination, the pressing blade can be installed in the blade base of most milling cutters, and then a polished blade can be disposed. Scraping blade can get better surface roughness than pressing blade only. Moreover, the application of scraper blade can reduce cycle time and cost. Scraping technology is an advanced technology, which has been widely used in turning, slot cutting and drilling. The selection of milling cutter body can make the efficiency of machining order more efficient than half the effort. Milling cutters are expensive. A face milling cutter with a diameter of 100 mm may cost more than 600 dollars. Therefore, careful selection should be made to meet the specific processing needs. 1. First of all, when choosing a milling cutter, the number of teeth should be considered. For example, a rough-tooth milling cutter with a diameter of 100 mm has only six teeth, while a compact-tooth milling cutter with a diameter of 100 mm has eight teeth. The size of tooth spacing will determine the number of cutter teeth involved in milling at the same time, which will affect the stability of cutting and the requirement of machine tool cutting rate. Each milling cutter manufacturer has its own series of rough and dense surface milling cutters. 2. Coarse-toothed milling cutters are mostly used for rough machining because they have larger chip grooves. If the chip groove is not large enough, it will cause the difficulty of scrap rolling or the friction between the chip and the cutter body and the workpiece will intensify. At the same feed speed, the cutting load per tooth of rough-tooth milling cutter is larger than that of dense-tooth milling cutter. 3. When finishing milling, the cutting depth is relatively shallow, generally 0.25-0.64 mm, the cutting load of each tooth is small (about 0.05-0.15 mm), and the power required is not large. Dense-tooth milling cutter can be selected, and larger feed can be selected. Because the metal removal rate is always limited in finishing milling, it's no harm to have smaller chip grooves in dense-tooth milling cutters. 4. For the spindle with bigger taper hole size and better rigidity, dense-tooth milling cutter can also be used for rough milling. Because dense-tooth milling cutters have more teeth involved in cutting at the same time, when using a larger cutting depth (1.27-5mm), attention should be paid to whether the power and rigidity of the machine tool are enough, and whether the chip-holding groove of the milling cutter is large enough. Chip removal needs to be tested and verified. If there is a problem with chip removal, the cutting parameters should be adjusted in time. 5. In heavy-duty rough milling, excessive cutting force can cause chatter of machine tools with poor rigidity. This kind of chatter will cause the carbide blade to collapse, thus shortening the tool life. Choosing rough-tooth milling cutter can reduce the requirement of machine tool power. Therefore, when the size of spindle hole is small (such as R-8, 30, 40),the rough tooth milling cutter can be effectively used for milling.