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Precision Aluminum Block 5052 is Al-Mg series rust proof aluminum alloy, can not be strengthened by heat treating, the chemical composition of precision 5052 aluminum block is similar to that of 5A02 alloy, and the properties are basically the same as those of 5A02. When Machining 5052 aluminum, it is found that the plasticity of the material is higher, but the strength is lower. the corrosion resistance and weldability of the material are good. The machinability of precision 5052 aluminum block is poor in the annealed state. Precision 5052 aluminum block are used for parts requiring good formability and corrosion resistance, high fatigue limit, good weldability and medium static load, such as cold stamping all kinds of ocean shipping and land transportation equipment parts, parts, sheet metal products, lamp pillar etc.. Aluminum and aluminum alloy, because the surface can generate hard and dense oxide film, many substances do not produce corrosion. Choose different alloys, used in industrial areas, coastal areas, will also have excellent durability. This feature can be used for door panels, vehicles, ships external covering materials, kitchen appliances, chemical installations, roof tiles, electric washing machines, desalination, chemical petroleum, materials, chemical packaging, etc.

Machining material writing introduction Mechanical processing is a common and all-encompassing technology category. The mechanical processing referred to here refers to the processing means used in surface effect treatment, which has some overlap with the mechanical processing in "Forming Process", and needs to pay attention to the difference. There are many kinds of mechanical processing, and the traditional processing means are nothing more than turning, milling, planing, grinding, punching, cutting, drilling, etc., and most of these traditional means are gradually integrated and iterated by the modern precision CNC machining center CNC. Some new techniques are also being developed. The length of this book is limited, so I will not list one by one. Only the most frequently involved processes in designers' design practices, such as sandblasting, drawing, polishing, stamping and rolling, will be discussed. characteristic The characteristics of machining can be summarized as: high speed, high efficiency and high precision. For different machining technology means, their respective characteristics are shown in the table below: Applicable material Sandblast grain Sand blasting is a kind of technology that uses compressed air or water flow to drive hard particles to carry out distributed impact on the workpiece surface to achieve cleanliness or roughness. Functional purposes such as rust removal, peeling coating, cleaning, etc., are not discussed here. The application of appearance technology is mainly discussed here. Generally, sandblasting technology is used to make dumb surface/fog surface/sand surface. Sandblasting can be used on almost all workpiece surfaces, including plastic, metal, glass, ceramic, etc., but the most used in mass production is the appearance of metal workpiece sandblasting, especially stainless steel and aluminum products Silk drawing Wire drawing is almost one of the most common metal decoration techniques. The drawing process can be seen in metals, especially stainless steel, ceramics and plastics. Drawing generally has physical grinding, CNC engraving and laser, processing methods to achieve the effect is also very different, the corresponding cost is also different. Rolling grain Rolling, also known as knurling, is a rather ancient process in which a knurling knife is used to add straight or mesh relief patterns on the surface of a cylindrical metal workpiece to increase friction and facilitate operation and use. However, with the demand of the public aesthetic, the aesthetic feeling of the process gradually rises, and in some products, the decorative function is more than the practical function. CNC engraving CNC engraving is the use of CNC on the workpiece surface for turning engraving, the production of silk and CD lines clean, order and rules, this book called the program texture, in addition, CNC engraving texture can also control the depth of the relief effect. polishing Polishing refers to the processing method using mechanical, chemical or electrochemical action to reduce the surface roughness of the workpiece so as to obtain a bright and smooth surface. It is the modification processing on the surface of the workpiece by using polishing tools and abrasive particles or other polishing media. Mechanical polishing Mechanical polishing is by cutting, material surface plastic deformation to remove the convex after polishing and smooth surface polishing method, generally using whetstone strip, wool wheel, sandpaper, manual operation. The method of super finishing polishing can be used if the surface quality is high. Super finishing polishing is the use of special grinding tools, containing abrasive polishing liquid, pressed on the workpiece is processed on the surface, for high-speed rotation. The surface roughness of Ra0.008μm can be achieved by this technique, which is the highest among various polishing methods. This method is often used in optical lens mold. Fluid polishing Fluid polishing relies on the high speed flowing liquid and the abrasive particles it carries to wash the workpiece surface to achieve the purpose of polishing. Common methods are: abrasive jet machining, liquid jet machining, hydrodynamic grinding, etc. Hydrodynamic lapping is driven by hydraulic pressure to make the liquid medium carrying abrasive particles flow through the workpiece surface at high speed. The liquid medium is mainly made of special compounds that flow well under low pressure and are mixed with abrasives. Abrasives can be silicon carbide powder Magnetic grinding polishing Magnetic grinding polishing is the use of magnetic abrasives under the action of magnetic field formed abrasive brush, grinding workpiece. Its advantages are high processing efficiency, good quality, easy to control processing conditions, good working conditions. With suitable abrasive, the surface roughness can reach Ra0.1μm.

A leader in the machining industry A LEADER IN THE MACHINING INDUSTRY Shenzhen Baoan Ruiyi Hang Technology Co., Ltd. is a collection of production, sales and service in one of the mechanical hardware professional processing manufacturers. Existing CNC lathes, four axis machining center, wire cutting machine tools, drilling and tapping machines and other advanced CNC equipment, mainly produces machinery, hardware, mold industry non-standard parts, business coverage is wide. The company is located in Baoan District, Shenzhen, Guangdong Province, Pearl River Delta, with mold research and development and production experience of the elite technical team, customer-oriented principle. With advanced production technology, efficient production methods and favorable prices for customers to provide customers with consistently high standard products. Implement the world's advanced quality control model, the implementation of rigorous quality testing, and strive to create superior hardware, mold industry non-standard parts brand. To combine foreign advanced technology with China Full integration of the Chinese market. The company spirit of "production of high quality, high efficiency and high precision three high products" principle, adhere to the factory production is not only products, more important is the reputation and quality of the "business philosophy, constantly absorb new technology, the introduction of new personnel and equipment, recognize the company's economic profit to achieve very good prospects. I believe that the company will never stop the pace of exploration and development, and customers mutual benefit and win,win, synchronous development. synchronous development.

As we all know, PTFE (Teflon) has good insulation performance, high and low temperature resistance and wear resistance,However, PTFE is relatively soft and has low hardness, so machining PTFE is easy to have burr.Machining PTFE is easy to deform. So, is there a material with stronger hardness, good insulation and wear resistance? The answer is "yes." that's utlem, PEI for short.ULTEM ,The exterior is amber and translucent. It is better than PTFE (Teflon), has excellent machining performance, of course, the price will be more expensive.Generally, 10% or 30% glass fiber is added to increase hardness and wear resistance. In the process of machining ULTEM, we found that it can be divided into three categories, ultem1000, ultem2100 and ultem2300.Ultem1000 is what we call ultem, ultem2100 is adding 10% glass fiber into ultem, and ultem2300 is adding 30% glass fiber into ultem.We call them: ultem1000 ,ultem2100 GF10%; ultem2300 GF30%. Machining ULTEM parts, please see the picture, It can be seen from the picture that the colors of the three parts are different. ULTEM is amber and transparent. ULTEM 2100 is close to yellow and translucent. Ultem2300 brown, opaque.In the process of machining UTLEM parts, the difficulty of machining them is,ULTEM2300>ULTEM2100>ULTEM1000.

machining aluminum parts with laser cutting When cutting this aluminum part, because the strength and hardness of the aluminum alloy are relatively low, the plasticity is small, the tool wear is small, the thermal conductivity is high, and the cutting temperature is low, the cutting machinability of the aluminum alloy is good. It belongs to the easy machining material and is suitable for high-speed cutting to ensure the processing accuracy.

The production process of aluminum oxide adopts a unique anodizing treatment, which is a breakthrough in the electrochemistry bright treatment technology. It can effectively protect materials from corrosion, is anti-static, does not dust and is easy to clean, is fireproof, has excellent oxidation resistance, and the anodized process surface never falls off. It is especially suitable for enterprises to choose at home. It is gradually becoming a new leader in the numerical control industry. It has high requirements for technology and high price. As the surface is fine and smooth and does not change color, it is the most resistant to cleaning among the three categories. It can be mainly divided into anodic aluminum oxide oxide film and aluminum oxide obtained by ordinary chemical oxidation treatment: The structure and surface of this product are anodized, which can have a very beautiful color after increasing the oxidation resistance and friction resistance of the surface. This product needs to have a certain degree of precision, because it also needs other parts to be assembled together, which is also the reason why this product adopts the relatively expensive machining method. In the actual working process, whether the product can operate normally is closely related to the accuracy of the parts. Therefore, in each processing enterprise, there are certain requirements for the precision and accuracy of parts processing, and we strive to control the errors as much as possible in the processing process and reduce the errors in the work, so that the precision of parts can obtain products with very good quality effects.

As a common metal, aluminum alloy is widely used in various fields. It can be said that machining aluminum parts has existed in our life.70% of the machining centers in our factory are machining aluminum parts. At first, there were only two kinds of aluminum alloy molding, aluminum block and aluminum bar. Any aluminum part can be machined with these two materials to produce aluminum alloy parts of various shapes,((for small precision aluminum parts only) With the increasing demand for aluminum parts, such as mobile phone aluminum frame. Engineers have found that it takes a lot of time to machine aluminum blocks into aluminum frames. High material cost and low machining efficiency.Therefore, the original aluminum block was designed as aluminum profile, which greatly reduced the material cost and machining cost. The process of machined aluminium profiles is like this: when the engineer receives the drawing of the part, he will increase the shape of the aluminum part by 0.5mm ~ 2mm, and then give it to the die factory. When the aluminum profile is extruded, it will be cut. The final process is handed over to CNC machining center for machining.

Machining Pei (ultem) is more difficult than PTFE because of its high hardness.The wear resistance of ultem parts has higher requirements for the cutting tools of CNC machining center.We have calculated that after 3.5 hours of machining ultem, the tool wear is 0.03mm,Therefore, the parameters of machining center should be modified to compensate the tool wear size. Of course, it is a good way to divide machining Pei into two steps. Rough machining and micro machining.Generally, engineers will reserve 0.5mm machining allowance for micro machining. When glass fiber is added to ULTEM materials, such as ultem2100 and ultem2300, more care must be taken when machining the above two materials.

As we all know, PTFE (Teflon) has good insulation performance, high and low temperature resistance and wear resistance,However, PTFE is relatively soft and has low hardness, so machining PTFE is easy to have burr.Machining PTFE is easy to deform. So, is there a material with stronger hardness, good insulation and wear resistance? The answer is "yes." that's utlem, PEI for short.ULTEM ,The exterior is amber and translucent. It is better than PTFE (Teflon), has excellent machining performance, of course, the price will be more expensive.Generally, 10% or 30% glass fiber is added to increase hardness and wear resistance. In the process of machining ULTEM, we found that it can be divided into three categories, ultem1000, ultem2100 and ultem2300.Ultem1000 is what we call ultem, ultem2100 is adding 10% glass fiber into ultem, and ultem2300 is adding 30% glass fiber into ultem.We call them: ultem1000 ,ultem2100 GF10%; ultem2300 GF30%. Machining ULTEM parts, please see the picture, It can be seen from the picture that the colors of the three parts are different. ULTEM is amber and transparent. ULTEM 2100 is close to yellow and translucent. Ultem2300 brown, opaque.In the process of machining UTLEM parts, the difficulty of machining them is,ULTEM2300>ULTEM2100>ULTEM1000.

When CNC machining processes are divided, it must be flexibly controlled based on the structure and manufacturability of the parts, the functions of the CNC machining center machine tools, the number of parts CNC machining content, the number of installations and the production organization of the unit. It is also recommended to adopt the principle of process concentration or the principle of process dispersion, which should be determined according to the actual situation, but must strive to be reasonable. The division of processes can generally be carried out according to the following methods: 1. Tool centralized sorting method. This method is to divide the process according to the tool used, and use the same tool to process all the parts that can be completed on the part. In order to reduce the tool change time, compress the idle time, and reduce unnecessary positioning errors, the parts can be processed according to the method of tool concentration, that is, in a clamping, use one tool to process all the parts that may be processed as much as possible, and then Change another knife to process other parts. This can reduce the number of tool changes, reduce idle time, and reduce unnecessary positioning errors. 2, the order of processing parts. The structure and shape of each part are different, and the technical requirements of each surface are also different. Therefore, the positioning methods are different during processing, so the process can be divided according to the different positioning methods. For parts with a lot of processing content, the processing part can be divided into several parts according to its structural characteristics, such as inner shape, shape, curved surface or plane, etc. Generally, the plane and positioning surface are processed first, and then the hole is processed; the simple geometric shape is processed first, and then the complex geometric shape is processed; the parts with lower precision are processed first, and then the parts with higher precision requirements are processed. 3, the roughing and finishing are sorted in order. When dividing the process according to factors such as the machining accuracy, rigidity and deformation of the part, the process can be divided according to the principle of separating rough and finishing, that is, roughing and then finishing. At this time, different machine tools or different tools can be used for processing; For parts that are prone to processing deformation, due to the deformation that may occur after rough machining, it needs to be corrected. Therefore, in general, all the processes that need to be roughed and finished must be separated. HONG KONG RYH CO., LTD was founded in 2008. Production site is located in Shenzhen Bao'an (Guang Dong Province) and with sales office located in Hong Kong. The branch of our group in Hong Kong is called Hong Kong RYH Co., Ltd. We are professional in CNC Machining service and molding service for OEM and ODM parts. Production types include CNC Milling, CNC Turning, grinding, stamping, bending, welding, die casting, drilling, tapping and injection molding.

In recent years, the domestic turning-milling composite processing technology has developed by leaps and bounds. There is a strong demand for large-scale horizontal turning-milling composite processing technology in locomotives, hydropower, water conservancy, mining, ships, and heavy industries. Today, Ruiyihang Technology is coming Let's share with you the technical characteristics of large horizontal machining centers, let's take a look. A: Technical parameters of CNC horizontal turning and milling machine tool The horizontal turning-milling compound processing machine tool has obvious advantages in torque output, carrying capacity and power. It breaks the style layout of the current overseas turning-milling compound center that can only be equipped with a single tool holder. It is equipped with a tool holder next to the right tool holder. The large-diameter cutterhead can complete all roughing and precision machining on one machine, making the operation more convenient, and the combination of the left-side tool post and the spindle c-axis function of the horizontal turning-milling compound machine is perfect. The realization of five-axis simultaneous machining. B: The overall layout of CNC horizontal turning-milling compound The large-scale horizontal turning-milling compound machine adopts the design of side-mounted single column, inclined bed and double headstock. The double-side hanging box of the machine is specially set up with a double-tool holder structure, so that the tool can be The direction of gravity is used, and this large horizontal turning-milling compound machine is also specially equipped with electrical devices, protective devices, workpiece detection, tool detection, tool magazines, chip removal devices, water cooling devices, and constant temperature cooling devices. C: Technical innovation of horizontal turning and milling Traditional turning-milling composite machining machines are generally equipped with a very single tool holder. They will install the turning tool and the rotating tool together on the same position in the B-axis tool holder of the machine tool, and there will be a special setting on it. The three-toothed disk used to lock the turning tool can make the suspension of the power shaft longer and reduce the rigidity. However, one thing is that the machine is not suitable for rough machining and can only be used for finishing. Although the horizontal turning and milling compound machine tool is equipped with a double tool post, the overall machine layout is still very compact. They use a single column, which is hung on the horizontal at an angle of 30 degrees. Turning and milling composite ground auxiliary guide rails and on the bed, so that while ensuring the smooth movement of the machine column, it can also effectively reduce the weight of the machine tool, reducing the processing cost of the machine and the amount of raw materials required.

The electric spindle spindle and the motor are integrated. Since they are integrated, there is no transmission mechanism in the middle. Electric spindles are generally used by frequency converters. Through the asynchronous motor formula, we know that the speed of the motor is proportional to the voltage, that is to say, the lower the speed, the lower the voltage, and the torque of the motor is proportional to the square of the voltage. In other words, the lower the voltage, the greater the torque attenuation. If it is in a low-speed state, the torque of the motor using the inverter will be very small. In order to obtain a relatively large torque at a low speed (usually when we are cutting large parts, the speed is relatively low, and because the parts are large, even if the cutting margin is not large, due to the large diameter, the torque is usually not small), generally In other words, gears are used to change speed, and the speed of the motor is not reduced to a very low level. The electric spindle can be used, but it depends on the occasion. If the cutting occasion is above 2000 revolutions (the maximum voltage appears at 50HZ, the highest frequency is 200HZ electric spindle), or the milling and drilling spindle with a speed of 4000 revolutions or more (the maximum voltage is at In the case of 400HZ, the highest frequency is 400HZ), it is recommended to use an electric spindle, after all, there is no connection mechanism, and it is easy to use. If it is not in these occasions, it is recommended to use variable frequency motor + gear box + frequency converter, with a wide torque output range, and two-stage gear shifting is fine. With the rapid development of numerical control technology, "composite, high speed, intelligence, precision, and environmental protection" has become the main trend in the development of today's machine tool industry technology. Among them, high-speed machining can effectively improve the machining efficiency of the machine tool and shorten the machining cycle of the workpiece. This requires the machine tool spindle and its related parts to adapt to the needs of high-speed machining. Spindle bearings for CNC machine tools are basically limited to four structural types: angular contact ball bearings, cylindrical roller bearings, bidirectional thrust angular contact ball bearings and tapered roller bearings. With the high-speed development of CNC machine tool spindles, ceramic materials (mainly si3n4 engineering ceramics) have excellent properties such as low density, high elastic modulus, low thermal expansion coefficient, wear resistance, high temperature resistance, and corrosion resistance, which have become high-speed manufacturing Ideal material for precision bearings. Ceramic bearings are more and more widely used. In view of the difficult processing of ceramic materials, precision ceramic bearings are mostly hybrid ceramic ball bearings whose rolling elements are ceramic and the inner and outer rings are still made of chromium steel. As a precise, efficient, and sensitive transmission element, the ball screw pair should not only use high-precision screws, nuts and balls, but also pay attention to selecting bearings with high axial rigidity, small friction torque and high running accuracy. In the past, ball screw supports commonly used bidirectional thrust angular contact ball bearings, tapered roller bearings, needle roller and thrust roller combined bearings, deep groove ball bearings and thrust ball bearings. The ball screw support is mostly single-row thrust angular contact ball bearings with a contact angle of 60°, and the accuracy is mainly p4 and above.

What is the function of CNC cutting fluidCutting fluid is essential for CNC machining. It can not only lubricate the friction between the tool and the workpiece, but also reduce the wear of the tool. Cutting fluid is an important supporting material for metal cutting. The history of human use of cutting fluid can be traced back to ancient times. People know that watering can improve efficiency and quality when grinding stone, bronze and ironware. In ancient Rome, olive oil was used when turning piston pump castings. In the 16th century, tallow and water solvents were used to polish metal armor. Beginning with the successful development of a boring machine by J. Wilkinson in 1775 in order to process the cylinder of a Watt steam engine, the application of water and oil in metal cutting was accompanied. After a long period of development in 1860, various machine tools such as turning, milling, planing, grinding, gear processing and thread processing appeared one after another, which also marked the beginning of large-scale application of cutting fluids. In the 1880s, American scientists had already carried out the first evaluation of cutting fluid. Long-term use will cause bacteria to grow in the cutting fluid, produce odor and make the workshop environment worse. Mainly, the guide rail oil of the machine tool is dripping in the cutting fluid. The cutting fluid will become turbid when mixed together for a long time and produce bacteria. Then do you want to change the cutting fluid? Selection and maintenance of cutting fluid For the grinding process, the grinding after grinding is very small, and a lot of heat will be generated during the grinding process. Therefore, when choosing a cutting fluid, it is necessary to consider both the lubrication and cold cutting performance and the classification of the cutting fluid. Oil-based cutting fluid, water-based cutting fluid, antifreeze cutting fluid, antirust cutting fluid, semi-synthetic cutting fluid, Jinwei emulsion cutting fluid, extreme pressure microemulsion cutting fluid, Discovered and clarified the phenomenon and mechanism that the use of a pump to supply the sodium carbonate aqueous solution can increase the cutting speed by 30% to 40%. As the tool material used at that time was carbon tool steel, and the main function of the cutting fluid was cooling, the term "coolant" was proposed. Since then, people have referred to cutting fluids as cooling lubricants. Grinding is widely used in the machinery manufacturing industry. After heat treatment and quenching of carbon tool steel and carburizing and quenching steel parts, a large number of relatively regularly arranged cracks often appear on the surface that is basically perpendicular to the grinding direction during grinding. --Grinding cracks, which not only affect the appearance of the parts, but also directly affect the quality of the parts. First, long-term use not only produces bacteria and makes the workshop environment poor, it is easy to block the waterway and cause damage to the water pump. The waste slag powder contained in the cutting fluid cannot be effectively filtered out, and the powder of the cutting fluid will affect the finish of the machined surface. Second, the cutting fluid becomes turbid after long-term use. Cutting fluid loss requires adding new fluid without cleaning up the old fluid. Direct addition of new fluid cannot effectively remove bacteria. Long-term exposure to cutting fluid will cause damage to the skin. The cutting fluid must be replaced if it has been used for a long time. Then, a new stock solution needs to be added for a replacement. How to deal with waste liquid? Cryogenic distillation and membrane filtration equipment is a purification of waste liquid. Let the water in it be restored. The restored water quality meets the national industrial water A-level discharge standard.

The thermal expansion coefficient of aluminum alloy parts is large, and it is easy to deform during thin-wall processing. When the free forging blank is used, the machining allowance is large, and the deformation problem is very clear. Today, let`s introduce in detail what measures should be taken when CNC machining aluminum alloy parts deform? We know that in CNC machining, there are many reasons for the deformation of aluminum alloy parts, which are related to the material, the shape of the part, the production conditions, and the performance of the cutting oil. There are mainly the following aspects: deformation caused by internal stress of the blank, deformation caused by cutting force and cutting heat, and deformation caused by clamping force. For this kind of CNC parts processing problems, CNC machining manufacturer Ruiyihang Precision has used practical experience to come up with some solutions for many years. 1 Optimize tool structure Reduce the number of teeth of the milling cutter and expand the chip space. As aluminum alloy material has larger plasticity, larger cutting deformation during processing, and larger chip holding space, so the bottom radius of the chip pocket should be larger and the number of teeth of the milling cutter should be smaller. 2 Fine grinding teeth Before using a new knife, you should lightly sharpen the front and back of the teeth with a fine oil stone to reduce the residual burrs and slight serrations when sharpening the teeth. This not only reduces the cutting heat but also reduces the cutting deformation. 3 Strictly control tool wear standards After the tool wears, the surface roughness value of the workpiece increases, and the deformation of the workpiece increases with the increase of the cutting temperature. Therefore, in addition to the selection of well-ground tool materials, the degree of tool wear should also be strictly controlled, otherwise it is easy to produce built-up edge. The temperature of the workpiece during cutting cannot be too high to reduce deformation.

Because of its own material, many people are very distressed when machining stainless steel with CNC. They don't know what kind of tool to use? How much is the amount of knife to eat? What is the speed and feed? Case study: For example, to process an 80×40 circulating groove with a groove width of 5mm and a depth of 3mm, I used a white steel knife with a diameter of 4 to make rough. Basically, one piece is broken and one knife is broken. The cutting depth is 1.5, the feed is about 50-80, but I don't know how to adjust the processing? At this time, two aspects need to be analyzed. 1. How to choose a tool when CNC machining stainless steel? Ordinary tools are more expensive to process stainless steel, and the results are not very good. If the batch is large, it is recommended to develop a special stainless steel tool; if it is a single piece of processing, the feed can be set to about 0.05mm per revolution for a single edge , That is to say, for three-flute milling cutter, S=2400, F=360, Z direction generally should not exceed 1MM, just between 0.5-0.7MM. If not, you can use alloy coating. 4-edge, change to depth of cut between 0.1~0.3, speed 1300~3000, feed 600~1200, depending on the tool you choose, the high-speed cutting efficiency can be faster. Stainless steel is difficult to machine, and the key lies in the tool. Such workpieces generally take 10 to 20 minutes, including clamping, depending on your machine tool and tool selection. Your depth of cut, speed and feed directly affect the life of your tool, which requires long-term accumulation of experience. 2. What are the characteristics of CNC machining stainless steel? Stainless steel itself is actually not high in hardness, but it has strong toughness, poor cutting performance, and easy sticking, so it hurts the knife, the workpiece is volatile, and it is easy to work hardening. The cutting tool should be sharp, the speed should not be high, the feed is generally around F1500, the amount of cutting tool should be reduced as much as possible, and the concentration of cutting fluid should be high.

Milling At present, the machining of large planes of cylinder blocks and cylinder heads in engines generally uses milling technology. Take the milling of a cast iron cylinder on a high-speed milling machining center as an example, using cubic boron nitride (CBN) inserts, and its cutting speed can reach 700-1500m/min. The production efficiency of milling is greatly improved. For aluminum alloy cylinder heads, face milling cutters are used for high-speed cutting. Using PCD inserts, the diameter of the milling cutter is gradually reduced, and the development of multi-station compound processing. Drilling In the engine production process, the proportion of hole processing is also relatively high, especially the amount of hole processing for cylinder heads and cylinder blocks. Among them, drilling processing accounts for about 60%, followed by boring processing and tapping processing. Application of high-speed cutting tools The history of the development of high-speed machining is the history of continuous advancement of tool materials. Most of the tools used by Shenzhen Ruiyihang Technology Co., Ltd. in the initial use of tools are imported, and breakthroughs have been made in localization. Now the more commonly used tools include CBN and PCD tools, coated carbide tools, ceramic tools, etc. . In addition, major breakthroughs have been made in the localization of quilting tools. 1. CBN and PCD tools The representative tool materials for high-speed cutting are CBN and PCD. When using CBN tools for face milling, the cutting speed can reach 5000m/min. Machining the inner hole of 20CrMo5 hardened gear (60HRC) with CBN tool, the surface roughness can reach 0.22μm, which has become a new technology promoted by the automobile industry at home and abroad. Camshafts and crankshafts also use CBN grinding wheels for high-speed grinding; PCD tools are widely used in the milling of cylinder blocks and cylinder head aluminum alloy materials. Considering that high-speed rotation will generate a large centrifugal force, the tool body uses high strength Made of aluminum alloy material. It is alumina grinding wheel. Because alumina base has high chemical stability and favorable thermal characteristics, considering practicability and economy, it is mainly used in the main journal cylindrical grinder with large grinding capacity, and the high-end grinding tool The representative CBN grinding wheel (see Figure 7) is applied to crankshaft connecting rod neck cylindrical grinders with higher follow-up requirements. 2. Carbide tool Hard part cutting is an important application field of high-speed cutting technology. That is, single-edge or multi-edge tools are used to process hardened parts. It is more efficient than traditional grinding, and simplifies the process methods and links, which not only saves costs, but also More flexible. In drilling and milling processing, ultra-fine grained cemented carbide is suitable for most applications. They also have high toughness and excellent heat resistance, which can combine favorable cutting edge geometries with large rake angles. And the clearance angle is integrated, the direct reflection of these characteristics is to reduce the cutting force and cutting temperature; when tapping, particularly high torque and elevated temperature at higher cutting speeds require very tough and high heat resistance Cutting materials. 3. Tool coating technology In order to make cutting tools with low price and excellent performance, which can effectively reduce the processing cost, coating technology is currently the first choice. The function of the tool coating: it can improve the wear resistance, increase the tool life, and improve the cutting performance; the existence of the coating reduces the friction between the tool and the chip, thereby increasing the drilling depth. Reduce cutting force; bright coating appearance (golden yellow, fire red, etc.), easy to observe the wear of the tool; the presence of coating on the tool surface can reduce cutting heat and reduce the interaction of heat between the tool and the workpiece (coating isolation) The tool and the workpiece, prevent chemical reactions; the thermal conductivity difference between the coating and the tool can reduce the accumulation of heat on the tool); the high-quality coating can improve the performance of the tool and reduce the formation of built-up edges and crescent craters. Comprehensive analysis of the economy and performance of the coating, the end mills used by Shenzhen Ruiyihang Technology Co., Ltd. for high-speed processing are mostly treated with TiAlN composite multi-layer coating technology, and the life of the drill bit with different coatings.

High-speed cutting is not only an increase in cutting speed, but also on the basis of comprehensive progress and further innovation in manufacturing technology, including major advances in driving, tool materials, coatings, tools, testing and safety, etc., in order to achieve cutting speed and advancement. Only by doubling the speed can the overall cutting efficiency of the manufacturing industry be significantly improved. The advantages of high-speed cutting technology are as follows: 1. Shorten production time Using high-speed cutting processing, the cutting speed and feed rate are doubled, the overall cutting efficiency is significantly improved, and the processing time is significantly shortened. 2. Reduce manufacturing costs Higher productivity levels will inevitably lead to a decline in manufacturing costs. The use of high-speed cutting equipment and tools can achieve the lowest manufacturing cost under mass production. 3. High-speed cutting absorbs energy The use of high-speed cutting processing, on the one hand, reduces the heat generation of the workpiece during processing, especially in milling processing. Due to the reduction of heat generation, the workpiece heats up less, the machining size is stable, and the damage to the tools and equipment is also small; on the other hand, high-speed cutting can process hard materials, which is an advantage that ordinary machine tools cannot match. 4. Improve the processing quality of the workpiece The use of high-speed cutting processing can greatly improve the processing accuracy and the quality of the cutting surface, and the surface roughness of the parts can reach the micron level, reducing and eliminating auxiliary work hours such as grinding and polishing. High-speed machining in engine manufacturing Nowadays, with the continuous adoption of new technology, the continuous development of superhard material cutting tools, coating cutting tools and alloy material cutting tools, high-speed machining has become more and more important in ordinary machining. Applications such as high-speed machining centers, high-speed external milling and high-speed grinding of CBN wheels in engine manufacturing are very common. In the application of high-speed machining in the engine manufacturing industry, the main characteristics of high-speed spindles with electric spindles and high linear movement speeds with linear motors. The purpose is to replace multi-spindle machining centers with single-spindle machining centers with high spindle speed and high-speed linear feed motion It is difficult to realize a combined machine tool with high spindle speed and high-speed feed. The maximum speed of the spindle is generally up to 60000r/min, and the maximum feed speed is about 100m/min. The electric spindle incorporates many cutting-edge technologies, such as high-speed bearings that generally use composite ceramic materials or electromagnetic suspension, high-speed motor technology, timing and quantitative oil and gas lubrication, and automatic tool change devices. In order to reduce costs, some companies do not use linear motors, but use ball screws with hollow coolant, enlarged diameter and enlarged lead. Shenzhen Ruiyihang Technology Co., Ltd. uses high-performance machine tools such as high-speed machining centers and CBN grinding wheels to achieve high-speed milling and grinding.

The cutting of titanium alloy belongs to powerful cutting, so the machine tool spindle must have a large driving power level and have a high-efficiency powerful cutting function. In the aviation industry, the machining of titanium alloy components is mostly cavity milling. In order to facilitate chip removal, the cooling and lubricating device must be managed. For chip removal, the cooling and lubricating device must be managed so that a large amount of high-pressure cooling lubricant can be sprayed directly on the tool blade. In this way, the former cools the tool, and on the other hand, it can better flush the chips out of the processing area in time, so as to prevent the chips from being cut several times, which will compare the tool life and scratch the processed surface. In order to enable the machine tool to have a high-power level cutting function, the German Heller company has created a targeted machine tool structure and coordinate axis structure, and is equipped with a strong cutting swing unit with rigidity to install the tool spindle, so that the machine tool is vertical, horizontal and spatial Any angle can produce the same cutting power level. The characteristics of titanium alloy are high strength and poor thermal conductivity. In order to achieve the cutting power like processing aluminum. So how to solve the oxidation problem? First, we first choose to use domestic standard aluminum alloy materials, and then choose professional aluminum alloy cutting oil to lubricate and cool the processing, and then choose imported aluminum alloy processing for high-gloss knives to implement processing with high-speed instruments. During processing, we ensure that the product can be evenly washed by the cutting oil, and quickly clean the product when off the machine to make a non-oxidizing high-gloss product. Shenzhen Ruiyihang Technology Co., Ltd. is a high-tech production enterprise specializing in the customization, research and invention, design customization, manufacturing, sales and service of non-standard automatic machinery parts. The company was established in 2014 and currently employs more than 90 people. Today, the equipment includes: four-axis five-CC CNC gantry milling machine, Japanese imported high-precision CNC turning and milling compound processing intermediate, high-precision C machining center C engraving machine C CNC lathe, full Automatic flat milling machine, large and medium-sized radial drilling machine and other supporting processing equipment and testing equipment can be engaged in the research and development, production and assembly of single-piece, batch and various clamping fixtures. The selection of the parameters of non-standard parts processing mainly includes the selection of cutting tool viewpoint, the selection of cutting speed, the selection of cutting depth and feed speed, etc. From the past experience, we know that when processing plastic materials, when choosing a tool with a larger rake angle, it can effectively suppress the formation of the buildup. This is when the rake angle of the tool is strengthened, the cutting force is reduced, the cutting deformation is small, and the tool and chip The contact length becomes shorter, which reduces the basis of built-up edge. Shenzhen Ruiyihang Technology Co., Ltd. is a high-tech production enterprise specializing in the customization, design, design customization, R&D design, sales and service of non-standard automatic machinery parts. The company was founded in 2014 and currently employs more than 90 people. Nowadays, the equipment includes: four-axis five-CC CNC gantry milling machine, Japanese imported high-precision CNC turning and milling compound processing center, high-precision C processing center C engraving machine C CNC lathe, full Automatic flat milling machine, medium-sized radial drilling machine and other supporting processing equipment and testing equipment can be engaged in the research and development, production and assembly of single-piece, batch and various clamping fixtures.

Turning processing is to use the rotary motion of the workpiece and the linear or curved motion of the tool to change the shape and size of the blank on a lathe, and process it to meet the requirements of the drawing. 1. Chip damage and protective measures. The toughness of various steel parts processed on the lathe is better, the chips produced during turning are full of plastic curl, and the edges are relatively sharp. During high-speed cutting of steel parts, red hot and long chips are formed, which are very easy to hurt people. At the same time, they are often wound on the workpiece, turning tools and tool holders. Therefore, iron hooks should be used to clean up or break them in time during work. It should be stopped to remove it when it is time, but it is never allowed to remove or pull it off by hand. In order to prevent chip damage, chip breaking, chip flow control measures and various protective baffles are often taken. The chip breaking measure is to grind chip breakers or steps on the turning tool; use a suitable chip breaker and mechanically clamp the tool. 2, the clamping of the workpiece. In the process of turning, there are many accidents that damage the machine tool, break or break the tool, and cause the workpiece to fall or fly out due to improper clamping of the workpiece. Therefore, in order to ensure the safe production of turning processing, special care must be taken when loading the workpiece. For parts of different sizes and shapes, you must choose appropriate fixtures, regardless of whether the three-jaw, four-jaw chuck or the connection between the special fixture and the spindle must be stable and reliable. The workpiece must be clamped and clamped. The sleeve can be used to clamp the large work piece to ensure that the work piece does not shift, fall off, or throw out when the workpiece is rotated at high speed and cut. If necessary, use the center frame, center frame, etc. to enhance the clamping. Remove the handle immediately after the card is tightened. As an important advanced manufacturing technology, high-speed machining technology has been widely used and continues to develop rapidly. Compared with traditional cutting processing technology, it has more outstanding performance in many aspects. Relying on precision high-speed processing machine tools or processing The center uses excellent programming software and qualified programmers to select corresponding special cutting tools to achieve a high material removal rate per unit time under the conditions of high-speed operation of the machine tool spindle, high tool cutting speed and extremely high workpiece processing speed . High-speed milling of aluminum alloy is one of the important application areas of high-speed cutting technology. The optimization of cutting parameters and the selection of cutting conditions are important research directions related to surface roughness and processing efficiency, and it is also one of the goals of studying high-speed cutting mechanism and technology. In this paper, the parameters of high-speed milling of aluminum alloy materials are optimized by the experimental optimization method, and the test data is analyzed and researched by the method of range analysis, and very important experimental conclusions are drawn. Provided for the high-speed machining of aluminum alloy Important reference.