News

PCD Cutting tools With the development of large-diameter diamond composite sheets, the use of diamond things has also expanded to industrial mass production, especially in the car and carpenter professions, diamond is replacing the traditional cutting things because of its excellent characteristics. PCD Cutting tools diameters can currently reach 74mm. Because PCD diamond composite sheets have the advantages of stable function and common cost-effectiveness, the data is also very agile in other fields. The following are suitable materials for processing with PCD: Particleboard, fiberboard, shredded board and high-hardness natural wood Metal matrix composite information Aluminum alloy Copper, brass, bronze, magnesium alloy ceramic, glass fiber, carbon fiber plastic, rubber Pre-sintered and sintered tungsten carbide mineral deposits Because PCD (polycrystalline diamond) has high wear resistance, it is also ideal for the manufacture of wear-resistant equipment suitable for use in ferrous and non-ferrous metals to the touch. In the production, we found that the tools and wear-resistant equipment welding Syndite are thirty times or even hundreds of times higher than the traditional products (such as cemented carbide), which is also related to the detailed use of the occasion. Cubic boron nitride is an excellent tool for processing quenched ferrogroup metals and alloys. However, because the composition of CBN is completed under high temperature conditions, it is difficult to obtain high-quality large-particle CBN single crystals due to the constraints of high-pressure chambers and the difficulties caused by composition technology. The scale of CBN single crystal is usually below 0.5mm, and the size of Z is not more than 3mm, so it is too small for use as a tool. Secondly, although the cubic boron nitride single crystal is very hard, it is affected by the crystal cleavage mechanism and is not ideally reflected in some processing and use. In this case, CBN polycrystallization, especially polycrystalline composite sheets with substrates, came into being. Its emergence is to solve the scale problem of CBN, and second, because these data are attributed to polycrystalline tissue, there is no cleavage problem, so that the toughness of CBN has been greatly improved. CBN polycrystallization has also been carried out with agility because of this. Is L-Carnitine useful to go blackheads to wrinkle eye cream eyeliner Which eye cream good day cream neck cream which good bb cream what brand of hair removal good with PCBN knife Binders for CBN polycrystal: The information used for CBN polycrystalline binders is very extensive, roughly divided into the following three categories: (1) metal or alloy binders, such as nickel, cobalt, titanium, aluminum, copper, etc. and their alloys; (2) Cermet binder composed of metals, alloys and ceramics, which contains carbides, nitrides, borides, silicide series cermets, such as titanium carbide, zirconium carbide, boron carbide, titanium nitride, titanium boride, aluminum silicide, etc.; (3) Non-metallic and boron nitrogen compounds, such as silicon, Me 3 B 2 N 4 ( Me is alkaline earth metal) and so on. CBN composite sheet: Although the cubic boron nitride polycrystalline without substrate overcomes the anisotropy of single crystal cubic boron nitride and the characteristics of small crystal scale, there are problems of connection and welding when making tools. Direct welding of a cube boron nitride polycrystalline sintered body that is hard and brittle and not easily moisturized and bonded by usual solder is actually very difficult. Solder with low melting point and easy to weld often lacks sufficient mechanical strength, and the suitable solder with high melting point has the danger of deteriorating the polycrystalline function or even incineration when welding (cubic boron nitride is in a metastable state at high temperature and atmospheric pressure, unstable). The cubic boron nitride fine particles and additives and cemented carbide substrate are sintered under high temperature and high pressure conditions to form a square boron nitride composite sheet, which successfully solves this problem, and the use of PCBN composite sheet is more convenient.

1. The tap quality is not good: Main material, tool design, heat treatment, machining accuracy, coating quality, etc. For example, the size difference at the transition of the tap cross-section is too large or the transition fillet is not designed to cause stress concentration, and it is easy to break at the stress concentration during use. The cross-section transition at the junction of the shank and the blade is too close to the weld, resulting in the superposition of complex welding stress and the stress concentration at the cross-section transition, resulting in a large stress concentration, which causes the tap to break during use. For example, improper heat treatment process. When the tap is heat treated, if it is not preheated before quenching and heating, quenching is overheated or over-burned, not tempered in time and cleaned too early, it may cause cracks in the tap. This is also an important reason why the overall performance of domestic taps is not as good as that of imported taps. 2. Improper selection of taps: For tapping parts with too much hardness, high-quality taps should be used, such as cobalt-containing high-speed steel taps, carbide taps, coated taps, etc. In addition, different tap designs are used in different work situations. For example, the number, size, angle, etc. of the chip flute heads of the tap have an impact on the chip removal performance. 3. The tap does not match the material being processed: This problem has been paid more and more attention in recent years. In the past, domestic manufacturers always thought that imported products were good and expensive, but they were actually suitable. With the continuous increase of new materials and difficult processing, in order to meet this demand, the variety of tool materials is also increasing. This requires selecting a suitable tap product before tapping. 4. The hole diameter of the bottom hole is too small: For example, when machining M50.5 threads of ferrous metal materials, a 4.5mm diameter drill bit should be used to make a bottom hole with a cutting tap. If a 4.2mm drill bit is misused to make a bottom hole, the part of the tap that needs to be cut during tapping will inevitably increase. , which in turn breaks the tap. It is recommended to choose the correct bottom hole diameter according to the type of tap and the material of the tapping piece. If there is no fully qualified drill bit, you can choose a larger one. 5. Tackling material problem: The material of the tapping piece is not pure, and there are hard spots or pores in some parts, which will cause the tap to lose its balance and break instantly. 6. The machine tool does not meet the accuracy requirements of the tap: The machine tool and clamping body are also very important, especially for high-quality taps, only a certain precision machine tool and clamping body can exert the performance of the tap. It is common that the concentricity is not enough. At the beginning of tapping, the starting position of the tap is incorrect, that is, the axis of the spindle is not concentric with the centerline of the bottom hole, and the torque is too large during the tapping process, which is the main reason for the break of the tap. 7. The quality of cutting fluid and lubricating oil is not good: Many domestic enterprises have begun to pay attention to this point. Many of them have purchased foreign countries and have a very profound experience. There are problems with the quality of cutting fluid and lubricating oil. The quality of the processed products is prone to burrs and other bad conditions, and the service life will also be very long. decrease. 8. Unreasonable cutting speed and feed: When there is a problem in processing, most domestic users reduce the cutting speed and feed rate, so that the propulsion force of the tap is reduced, and the thread accuracy of its production is greatly reduced, which increases the roughness of the thread surface. The hole diameter and thread accuracy cannot be controlled, and problems such as burrs are of course more unavoidable. However, if the feed speed is too fast, the resulting torque is too large and the tap is easily broken. The cutting speed during machine attack is generally 6-15m/min for steel; 5-10m/min for quenched and tempered steel or harder steel; 2-7m/min for stainless steel; 8-10m/min for cast iron. For the same material, the smaller the tap diameter takes the higher value, and the larger the tap diameter takes the lower value. 9. The operator's technology and skills do not meet the requirements: The above problems all require operators to make judgments or give feedback to technicians, but at present, most operators in China do not pay enough attention. For example, when processing blind hole threads, when the tap is about to touch the bottom of the hole, the operator does not realize that the tap is still fed at the tapping speed before reaching the bottom of the hole, or the tap is broken due to forcible feeding when the chip evacuation is not smooth. . It is recommended that operators strengthen their sense of responsibility. It can be seen from the above that there are various reasons for the breakage of taps, including machine tools, fixtures, workpieces, processes, chucks and tools, etc. It is possible that the real reason may never be found just on paper.

The carbide milling cutter is made of ultra-fine grained carbide material, which has good milling and cutting performance, ensuring high work efficiency, and also has high hardness, sufficient bending strength and excellent wear resistance, and, Slots, holes and plate edges are milled, and the surface is clean, tidy and free of burrs. Carbide milling cutters are mainly used in the processing of PCB (PrintedCircuitBoard) printed circuit boards, so it is also called carbide PCB milling cutters. The main types of carbide milling cutters: 1. Cylindrical milling cutter: used for machining planes on horizontal milling machines. The cutter teeth are distributed on the circumference of the milling cutter, and are divided into straight teeth and helical teeth according to the tooth shape. According to the number of teeth, there are two kinds of coarse teeth and fine teeth. The helical-tooth coarse-tooth milling cutter has few teeth, high tooth strength, and large chip space, which is suitable for rough machining; fine-toothed milling cutter is suitable for finishing. 2. Face milling cutter: It is used for machining planes on vertical milling machines, face milling machines or gantry milling machines. There are cutter teeth on the end face and circumference, and there are coarse teeth and fine teeth. Its structure has three types: integral type, insert type and indexable type. 3. End mill: used for machining grooves and stepped surfaces, etc. The cutter teeth are on the circumference and end face, and cannot be fed in the axial direction during work. Axial feed is possible when the end mill has end teeth that pass through the center. 4. Three-sided edge milling cutter: It is used to process various grooves and stepped surfaces, and there are cutter teeth on both sides and on the circumference. 5. Angle milling cutter: used for milling grooves at a certain angle, there are two types of single-angle and double-angle milling cutters. 6. Saw blade milling cutter: It is used for machining deep grooves and cutting workpieces, and there are more teeth on its circumference. In order to reduce friction during milling, there are 15′-1° secondary declination on both sides of the cutter teeth. In addition, there are keyway milling cutters, dovetail milling cutters, T-slot milling cutters and various forming milling cutters. 7. T-shaped milling cutter: used to mill T-shaped grooves. Maintenance of carbide milling cutters 1. Check the power and stiffness of the machine tool to ensure that the required diameter of the milling cutter can be used together. 2. The overhang of the tool on the spindle should be as short as possible to reduce the impact of the axis of the milling cutter and the position of the workpiece on the impact load. 3. Use the correct milling cutter pitch for the process to ensure that there are not too many blades meshing with the workpiece at the same time to cause vibration. On the other hand, when milling narrow workpieces or milling cavities, make sure that there are enough The blade engages with the workpiece. 4. Select the correct feed rate, main declination angle and use cutting fluid in a timely manner.

There are many types of reamers, including tapered pins and hand reamers. Hereinafter, it refers to high-precision mechanical reamers using lubricating oil in lathes or machining centers. Regardless of the purpose, a reamer is a precision tool. Its successful manufacture depends not only on the grinder and operator, but also on the characteristics of the tool itself. Reamers can be produced from carbide, high-speed steel or metal-ceramic composites.PCD reamer Reaming is essentially the process of reaming. The reamers are designed to slightly enlarge the size of the drilled hole, but with high precision, ensuring a smooth surface finish on the sides of the hole. With the correct use of reamers, thousands of holes can be reamed to high precision holes without compromising performance. Reamers are the most accurate hole-making tools currently available, and if used in metalworking, they are usually used for high tolerances of H6/H7 according to ISO standards. Both ISO and ANSI metric standards refer to fasteners that can be freely assembled and disassembled. Reamers cannot remove large amounts of material. The amount of material removed depends on several factors, including the material to be machined and the size and quality of the pre-drilled holes. For mechanics, this is a process that requires careful balancing. In order for the reamer to work efficiently, it is critical to have the correct allowance in the hole. Too much allowance and the reamer may struggle to run and the hole may be deformed. Too little allowance and the reamer will rub and wear, resulting in poor hole quality. The cutting edge of the reamer needs to have a certain hardness to prolong the service life; it also needs to have good toughness so that the tool will not fail during normal use. Proper use controls a small amount of material allowance to ensure long reamer life and a high hole finish. Also, if the workpiece is not held securely when reaming, chattering can result, the finish of the part will be poor and the cutting edge will become dull. Friction and extreme heat can also cause problems during reaming, which means that effective lubrication is essential not only to cool the tool, but also to extend the life of the reamer. Lubrication also increases cutting speeds, reduces cycle times, and removes chips, helping to improve the finish of the workpiece. Manufacturers can't take any shortcuts, as the reamer must be absolutely straight with minimal runout to produce holes of precise roundness and size, such as a tolerance of -0/+0.002mm (.0008").

PCD Cutting tools rely on their superior properties such as high hardness, wear resistance, heat resistance and long life, as well as a wide range of applications. Therefore, the amount of PCD Cutting tools is increasing year by year. Due to the superior performance of high hardness, wear resistance, heat resistance, long life, and a wide range of application fields, the amount of pcd tools is increasing year by year. Although PCD Cutting tools have high hardness, they are only suitable for processing non-ferrous metals and non-metallic materials, such as: aluminum, aluminum alloys, high silicon aluminum, copper, copper alloys, titanium alloys, carbon fiber composite materials, glass fiber, composite materials and other materials. Iron metal materials cannot be machined because the characteristics of PCD tools will produce chemical reactions at high temperatures and damage the tools. In the finishing of some ferrous metals or the machining of small allowances, under the condition of good cutting temperature control, and the finishing of non-ferrous metals, PCD tools show extremely strong wear resistance. 1. Features of PCD tools PCD knives have three notable features: 1. It can withstand higher linear speed, so it can significantly improve the processing efficiency. 2. High hardness and strong wear resistance, which directly bring longer tool life. This feature may bring great benefits to the popularization of PCD tools under the current high labor cost. 3. Higher surface finish and flatness.

The processing of rolls is mostly turning, and a few are milling. This article mainly introduces the selection of turning tools for processing rolls. We all know that the roll is an important part of the rolling mill, and it is the steel that turns the rolled material into various structural methods, such as steel plate, steel wire, U-shaped steel, T-shaped steel and so on. The cost of rolls is about 5%-15% of the production cost of steel rolling, which is directly related to the production power, product quality and production cost of steel production enterprises. Therefore, more and more high-hardness rolls appear, such as high-nickel-chromium cast iron rolls, Chilled cast iron rolls, nickel hard cast iron rolls, high speed steel rolls, high boron steel rolls, carbide rolls/roll rings, etc. How to choose turning tools for such a high hardness roll? Problems often encountered when processing rolls 1. High hardness. The hardness of the rolls after casting is generally above HSD75. Especially now, more and more cemented carbide rolls/roll rings are on the market, and the hardness is extremely high, which cannot be processed by traditional tools. 2. Low power. Because of the high hardness of the heat-treated rolls, grinding is generally used, or traditional tools may be used to gradually "gnaw", especially for large rolls with large margins and extremely low processing power. 3. The tool is not wear-resistant. As-cast rolls not only have high hardness, but also often have casting defects such as sand inclusion and pores, which will cause rapid tool wear and low life, and frequent tool changes will affect normal processing. Selection of processing roll turning tools For high hardness rolls, the current turning tool raw materials areCBN tools andPCD tools , the whole process of CBN tools are cubic boron nitride tools , PCD tools areDiamond tools . For different raw materials, choose different super-hard knives . The main components of CBN tools are CBN particles (cubic boron nitride) and special ceramics and metal binders, which have high hardness at room temperature and high temperature. Tool raw materials that have less chemical reaction with the material to be cut. Mainly for ferrous materials, such as high nickel-chromium cast iron rolls, chilled cast iron rolls, nickel-hard cast iron rolls, high-speed steel rolls, high boron steel rolls, etc., cutting with large allowances, even if there are serious sand inclusions / pores on the surface, there is no any impact. Among them, the BN-K1 raw material CBN turning tool is used for processing high-hardness cast iron rolls, the BN-S20 raw material CBN turning tool is used for processing high-hardness cast steel rolls, and the BN-S10 raw material CBN turning tool is specially designed for high-speed steel rolls. PCD Cutting tools are mainly aimed at cemented carbide rolls/roll rings. The hardness of cemented carbide rolls is too high, which has exceeded the acceptable hardness range of CBN tools, so higher PCD Cutting tools can only be used for turning. Among them, CDW010 raw material is a general raw material with balanced power and life. If there are special requirements for a certain item, such as smoothness or wear resistance, CDW302, CDW005 and other raw materials can be used to "prescribe the right medicine".

The pcd blade, like the PCD Cutting tools, has the advantages of high hardness, low friction coefficient, low thermal expansion coefficient, wear resistance, and long life. Most of the industrial use is pcd composite sheet, and the pcd blade is a blade made of pcd composite sheet as raw material. Milling insert: a rotary tool with one or more teeth used for milling. Each tooth intermittently cuts off the allowance of the workpiece during operation. The milling insert is mainly used for machining planes, steps, Grooves, forming surfaces and blocking workpieces, etc. Three, pcd car blade Turning is one of the most widely used tools in cutting. The turning inserts have positive rake angles and grooves for easy chip breaking, because the working part of the pcd turning insert is the part that generates and handles chips, including the cutting edge, which breaks the chips. Or rolled up structure, chip removal or chip storage space, cutting fluid channel and other structural elements. Fourth, pcd blade use and processing materials pcd tools are widely used in aviation, aerospace, automobile, electronics and other industries, and can process non-ferrous and non-metallic materials. PCD inserts are suitable for processing non-ferrous metals such as Al, Mg, Cu and their alloys and non-metallic materials. Non-ferrous metal materials and their alloys: such as aluminum, cast aluminum, aluminum alloy, magnesium, magnesium-aluminum alloy, silicon-aluminum alloy, copper, copper alloy, red copper, brass, tungsten carbide, ceramics and other raw materials, parts such as car pistons , Car wheels, roller rings and other parts. Non-metallic materials: such as composite materials, carbon fiber, glass fiber, graphite, glass, reinforced plastics and other raw materials, such as aircraft wings, carbon fiber car parts, graphite electrode molds, fiber sheets, granite, glass fiber tubes, glass fiber boards, etc. The above is all the content shared today, if necessary, you can consult our online customer service or make a phone call, we will serve you wholeheartedly!

The high hardness and high wear resistance of PCD tools are destined to be a relatively difficult tool to grind. The grinding of PCD tools is very different from the ordinary grinding process, because PCD tools are the process of grinding diamonds with diamonds. Grinding machines, diamond grinding wheels and grinding processes all have high demands. The selection of PCD tool grinding wheel should pay attention to the following points, then follow the editor of OPT to take a look! 1. Granularity selection The smaller the particle size, the smoother the surface grinding. Of course, it is impossible to choose only one particle size, and the thickness should be combined. 2. Binder selection There are three kinds of bonding agents: diamond, resin and ceramic bond. diamond grinding wheel Bronze binder is used, which has good formability, high strength and certain toughness, but poor self-excitation. Resin bond grinding wheel High strength, good elasticity, and stable bonding, but the resin is a polymer material with no fixed melting point, so the heat resistance is poor. When the temperature reaches above 200, the bonding ability is greatly reduced. vitrified bond grinding wheel High hardness, good self-excitation, stable chemical properties, heat resistance, water resistance, acid resistance, etc., and low cost, but the vitrified bond grinding wheel is powder pressed, so the uniformity is difficult to guarantee, and it is relatively brittle, so grinding Abrasive particles and binders tend to fall off collectively during processing. In general, these three grinders have their own characteristics, and the needs depend on the actual situation.

Diamond tools are a relatively common tool in the machining industry. There are many kinds of such tools. As long as you choose the right diamond tool, you can achieve more with less effort in machining. Today, let`s talk about it: machining process What about the diamond tools used in? How to choose the right diamond tool? What about diamond tools? 1. Diamond tools have the advantages of high hardness, wear resistance, high thermal conductivity, and low thermal expansion coefficient. It can be used for precision machining of non-metallic hard and brittle materials, such as graphite, composite materials, high-silicon aluminum alloys and other metal materials. There are many kinds of diamond tools on the market now, and their functions are significantly different. Different types of diamond tools have great differences in their structure and application fields. 2. Natural diamond tools are widely used in precious metals such as copper, copper alloy, silver, rhodium, etc., as well as ultra-precision mirror processing. Common ones are: optical plane mirror, polygon mirror, etc. But its crystal anisotropy, the tool is expensive. The function of PCD depends on the content of cobalt, and the tool life is 10 to 500 times that of cemented carbide tools. It is used for turning various non-ferrous metals, such as aluminum, magnesium and non-metallic materials with strong wear resistance. 3. The sharper the blade, the easier it is to decompose the object. Therefore, when we choose a tool, we should check whether the blade is sharp and whether there are obvious gaps. There are many kinds of knives on the market now. If they are divided by raw materials, they can be roughly divided into steel, carbon steel and ceramics. In fact, it is not that the higher the hardness, the sharper the blade, because this is also related to the softness of the blade. 4. In the cutting process, the tool needs to face a lot of cutting force and impact force, so the tool must have strong strength and toughness. Another thing we need to know is that the tool should have certain wear resistance and heat resistance. Because the tool cuts certain things during use, it has stronger wear resistance than other things.

Since the beginning of the 21st century, the biggest change in the technology of the manufacturing industry is the change of cutting tools. The original alloy tools and ceramic tools can no longer meet the application needs of various difficult-to-machine materials. At this time, CBN (cubic boron nitride) The tool came into being and became the mainstream tool for cutting difficult-to-machine materials. CBN (cubic boron nitride) is a superhard material obtained by artificial synthesis. Because of its excellent hardness, good high temperature resistance and wear resistance, it has been widely used in the tool industry. In this article, OPET TOOLS will talk about the main performance characteristics of CBN inserts and suitable materials for processing. The main performance characteristics of CBN tools: (1) Extremely high hardness and wear resistance. The hardness of CBN tools can reach 3000~5000HV. When cutting wear-resistant materials, its wear resistance is 50 times that of cemented carbide tools, 30 times that of coated carbide tools, and 25 times that of ceramic tools. One of the best knives to sharpen. (2) It has high thermal stability. The heat resistance of CBN tools can reach 1400~1500 ℃, which is almost double that of diamond. Therefore, CBN tools can be used for high-speed cutting of superalloys and hardened steels at a speed 3 to 5 times higher than that of carbide tools. (3) Excellent chemical stability. CBN cutting tools have high oxidation resistance and will not oxidize at high temperature of 1000 °C, so CBN cutting tools are suitable for cutting hardened steel and chilled cast iron, and can be widely used in high-speed cutting of cast iron. (4) Good thermal conductivity. The thermal conductivity of CBN tools is 3.2 times that of pure copper and 20 times that of cemented carbide. Good thermal conductivity can reduce the temperature at the tip of the tool, reduce tool wear, and help improve machining accuracy. (5) Lower friction coefficient. The friction coefficient between CBN tools and different materials is about 0.1~0.3, which is much smaller than that of cemented carbide, so it can reduce the cutting force during cutting, reduce the cutting temperature, and improve the quality of the machined surface. What material is suitable for CBN blade to cut: (1) High hardness cast iron. It is a type of cast iron with increased hardness made by adding some specific alloy elements to general cast iron by certain means, including high chromium cast iron, alloy cast iron, nickel hard cast iron, white cast iron, etc. The more common processing parts are Rolls, industrial pumps, etc. (2) High hardness steel parts. It is steel with high carbon content, high hardness but relatively brittle, such as high manganese steel, high speed steel, hardened steel, etc. The more common processing parts are rolling mortar wall, high speed steel roll, hardened gear/gear shaft, bearing , ball screw, mold, etc. (3) General gray cast iron. It refers to the cast iron with flake graphite, because the fracture is dark gray when broken, so it is called gray cast iron, and it is the most widely used type of cast iron. The more common processing parts are engine block/cylinder head, brake disc, brake drum, pulley, clutch pressure plate, etc. (4) Other difficult-to-machine materials. In addition to the above materials, there are other materials with hardness greater than 250 and tensile strength greater than 1000MPa, which are collectively referred to as difficult-to-machine materials, such as powder metallurgy, superalloy materials, and nickel-based, iron-based, cobalt-based and other high-hardness materials.

First, the choice of blade grinding equipment In order to improve the blade grinding efficiency of the PCD tool, the blade grinding equipment needs to have certain conditions, mainly manifested in the following aspects: 1. Sufficient rigidity and stability: Due to the extremely high hardness of the grinding material, the PCD tool material cannot be removed without a certain pressure between the grinding wheel and the grinding piece. Therefore, the grinding wheel shaft and other mechanisms must have sufficient rigidity.In addition, the spindle power should be large enough, not less than 1kW, recommended to use 2kW. 2, Unique grinding wheel swing mechanism: unlike the general tool grinder, special tool grinder is grinding wheel frame for lateral swing, to prevent the grinding wheel wear ratio is too low grinding wheel surface groove, grinding machine should use precision bearing, precision rail and precise drive system, to avoid the grinding wheel in swing when small shaking and affect the quality of the blade mouth. 3. Adjustable grinding force: according to the processed tool and the grinding wheel used, the grinding pressure should be able to achieve adjustable constant pressure.The purpose of adjusting grinding force is to compensate for the change of grinding force in the contact area of the grinding wheel. By adjusting the pressure during rough grinding and fine grinding. 4, high precision rotary table system and optical projection device more advanced tools grinder generally with optical projection device and high precision rotary table, so that after a card, not only can grind the blade, and can accurately grinding between the tool arc, and on the machine through projection device directly observe the arc and blade quality. 5. The coolant can be fully supplied: the cooling system should have at least 20 L/min of flow rate, and the aqueous solution supplemented with rust inhibitor is usually used as the coolant. 2. Selection and dressing of the grinding wheel 1. Granularity selection The smaller the particle size of the grinding wheel, the smoother the surface grinding, and the lower the surface roughness of the grinding.However, on the premise of meeting the processing quality requirements of the tool blade mouth, we should try to choose the coarse-grained grinding wheel, so as to not only ensure the processing quality, but also improve the processing efficiency.It is difficult to achieve satisfactory results for the grinding processing of PCD tool. Generally, 2-3 different grain size grinding wheels are selected for coarse and fine grinding. 2. Selection of binder agent At present, there are three commonly used resin binding agent, metal binding agent and ceramic binding agent diamond grinding wheel, with different characteristics, which can be flexibly applied according to the processing methods and processing conditions. (1) Metal binding agent sand wheel characteristics: the more common is the bronze binding agent.Bronze binder diamond sand wheel is characterized by good molding surface, high strength, certain toughness, but poor self-sharpening. (2) Resin binder agent sand wheel characteristics: high strength, good elasticity, stable binding, but the resin material is a polymer material, no fixed melting point, poor heat resistance, when the grinding temperature reaches 200-300℃, its binding capacity will be greatly reduced.(3) Characteristics of ceramic binder grinding wheel: Ceramic binder grinding wheel is characterized by high hardness, good self-sharpening, stable chemical properties, water resistance, heat resistance, acid resistance and low cost.However, the ceramic binding machine grinding wheel is generally powder pressed molding, the uniformity of the molding body is difficult to guarantee, and relatively brittle, so in the grinding processing, grinding particles and binding agent are easy to fall off collectively. 3. Repair of the grinding wheel Grinding wheel trimming is essential in grinding and processing. Through dressing, the grinding wheel can keep in good processing state and ensure the processing efficiency and processing quality.The smoother the grinding wheel trim, the smaller the roughness value of the processed surface, and to obtain the very low roughness value of the grinding surface, the grinding wheel must be finely trimmed.In addition, during the tool grinding process, the grinding wheel working surface will be blocked by grinding chips.At this time, as the diamond exposure is smaller, the grinding capacity is reduced, the grinding pressure increases, will increase the vibration of the machine tool, affect the processing quality, and the friction increases, the heat increases, may burn the PCD blade.In order to avoid the above situation and ensure the processing efficiency and processing quality, the grinding wheel is necessary to repair in the grinding processing, trimming tools generally use silicon carbide sand strip. Three, PCD tool clamping and adjustment First of all, the rotary center of the cross table and the center of the optical projector should be adjusted to coincide, and then according to the requirements of the drawings, the PCD tool should be adjusted to the optical projector reference line through the cross table, and the position is the blade grinding position.To ensure the accuracy requirements of the PCD tools, all the blade grinding dimensions should be completed in a single clamp. If the PCD tools are repaired, all the wear amount must be removed. 4. Swing parameters of the diamond grinding wheel Because the diamond grinding wheel is relatively expensive, in order to make full use of the efficiency of the grinding wheel and prevent trench marks, according to the size of the PCD tool, attention should be paid to the amplitude of the swing value, by adjusting the swing and frequency of the grinding wheel swing frame of the blade grinding tool to ensure that the coincidence degree of the grinding wheel and the tool is greater than or equal to 1. V. Minimum blade grinding allowance of the PCD tool Usually in the process of cutting tools, the cost of blade grinding is the highest, and minimizing the amount of removal is the goal pursued.The minimum machining allowance depends on the cutting mode and the depth of the PCD damage caused by the heating process.It consists of three parts: the depth of damage to the surface; the depth of internal tissue; the influence of heating mode.

The knowledge of diamond tool is the difference between coating, coating is a carbon film accumulated by PVD process, and then can reduce the number of knife changes, improve processing reliability and accuracy consistency; in addition, diamond tool variety and use is single crystal diamond spiral milling cutter, used for mobile phone keys, handset processing. Diamond knives several big common sense: 1. Difference between the coating Amorphous diamond (also known as diamond carbon -- translation) coating is a carbon film accumulated by PVD process. It has both part of the diamond SP3 bond, and part of the carbon SP2 bond; Its film forming hardness is very high, but lower than the hardness of diamond film; It's also thinner than the diamond film that we usually accumulate. When processing graphite, the life of amorphous diamond coated tools is 2-3 times that of uncoated carbide tools.In comparison, CVD diamond is the pure diamond coating accumulated by CVD process, the tool life of processing graphite is 12-20 times that of the carbide tool, and then can reduce the number of knife changing, improve the reliability and accuracy of processing. 2. Processing of hardened steel Diamond is made up of carbon atoms.When some materials are heated, they absorb carbon atoms from the diamond and form a carbide in the workpiece.Iron is one of such materials.When processing iron family materials with diamond knives, the heat from the conflict spreads the carbon atoms in the diamond into the iron, which then causes the diamond coating to fail early due to chemical wear. 3. Constraint of cutting tools Heavy grinding and (or) heavily coated diamond coating tool quality is difficult to ensure that because the coating surface of the tool is pure diamond, it takes a long time to regrind the tool with a diamond grinding wheel. In addition, knives are selected for diamond growth.The preparation process will change the chemical characteristics of the appearance of the chemical characteristics of the coating. 4. Tool life Like any other tool, the life of diamond-coated tools varies, depending on the cut material, the selected feed rate and cutting speed, and the shape of the workpiece.In general, diamond-coated knives that process graphite last 10-20 times longer than uncoated carbide tools, and in some cases or perhaps longer. In this way, almost any processing mission can be accomplished with a single tool, without knife replacement due to tool wear, avoiding processing interruption and scratch calibration, and then perhaps completing unattended processing.In the processing of composite materials, it may also achieve a long tool life. 5. Variety and use of diamond cutting tools A. Single-crystal diamond spiral milling cutter: Features: single-edged diamond spiral milling tool, its diameter can be as small as 2.0mm, first used for fine hole processing, can be continuous without vibration of good cutting processing. Usage: generally used for mobile phone button, handset processing. B. Diamond polishing knife Features: diamond polishing knife handle requirements: BT40 / 30, advocate rotation: 3000 (min-1), walking knife speed: 120-200 m m r/min, feed: 0.03-0.05mm.According to the cutting depth, machine tool rigidity and other use conditions, to adjust the number of turns and walking knife reasonably. Usage: First

Like a pcd tool, the pcd blade has the advantages of high hardness, low friction coefficient, low thermal expansion coefficient, wear resistance and long life. Industrial use is more pcd composite, pcd blade is the pcd composite piece as raw material blade. Milling blade: a rotary tool with one or more teeth, each blade intermittently cut the workpiece, milling blade is first used for processing plane, steps, groove, forming surface and block workpiece on the milling machine. Three, the pcd car blade Cutting is one of the zui wide tools used in cutting processing, and the car blade has the front Angle and groove for debris cutting, because the operation part of pcd car blade is the part that produces and handles chips, including the blade, making the chip broken or rolling structure, the space for discharging or storing debris, cutting fluid channel and other structural elements. IV. Use and processing materials of pcd blades The pcd tool uses a wide range of aviation, aerospace, sedan, electronics and other industries, and can process non-ferrous metal materials and non-metallic materials and. The PCD blade is suitable for the processing of non-ferrous metal materials such as Al, Mg, and Cu and their alloys and non-metallic materials. Non-ferrous metal materials and their alloys: such as aluminum, cast aluminum, aluminum alloy, magnesium, magnesium aluminum alloy, silicon aluminum alloy, copper, copper alloy, copper, brass, tungsten carbide carbide carbide, ceramics and other raw materials, parts such as car pistons, car wheels, roller rings and other parts. Non-metallic materials: such as composite materials, carbon fiber, glass fiber, graphite, glass, reinforced plastic and other raw materials, such as aircraft wings, carbon fiber car parts, graphite electrode die, fiber board, granite, glass fiber tube, glass fiber board, etc.

Aluminum-based silicon carbide is a particle-reinforced metal-based composite material composed of silicon carbide (SiC) and granular aluminum. With excellent high hardness, high toughness, high plasticity, high modulus and other advantages, it is used in aviation and aerospace. , Electronic chips, high-speed rail, satellites and other fields are widely used. As a modern new type of composite material, aluminum-based silicon carbide composite material has many advantages, but it also has obvious shortcomings, namely, difficult machining, fast tool wear, high production cost, and low efficiency. The main reason for the difficulty in machining is that the hardness of the silicon carbide reinforced particles in the aluminum-based silicon carbide composite material is very high, which is second only to diamond. At the same time, the surface of the aluminum-based silicon carbide composite material is rough, and the distribution of silicon carbide hard points is uneven. The tool wears quickly, and at the same time, it will produce greater vibration during cutting, which affects the machining accuracy. Therefore, the choice of tool and machine tool in processing are particularly important. Common processing methods of aluminum-based silicon carbide composite materials include milling, drilling, etc., to process curved surfaces, holes, and grooves. In order to better control costs, rough machining can be processed with cemented carbide tools, and PCD tools can be used for finishing. For milling and drilling, the hardness of cemented carbide tools is lower than that of aluminum-based silicon carbide, and the durability is low, but it can be cut with a large margin. PCD tools have high hardness, but the cutting margin is small, suitable for finishing, and guarantees aluminum-based silicon carbide Requirements for dimensional accuracy and surface roughness of composite parts. The PCD tool produced by OPT Tool Company is a synthetic polycrystalline diamond tool that can be made into PCD turning tools, blades, milling cutters, reamers, drills, etc. For aluminum-based silicon carbide composite materials, commonly used tools include PCD milling cutters and PCD drill bits. Common materials are CDW010, CDW025, and CDW302. Different materials are selected for efficient processing according to the composition of aluminum-based silicon carbide.

Recently, the development and application of multifunctional rotary cutting machines with PCD tips have increased. This tool can perform drilling, reaming, chamfering, finishing and other multi-hole machining operations at one time. PCD cutting tools has been significantly improved and costs have been greatly reduced. Our company mainly produced PCD tools: PCD inserts, PCD end mills, PCD reamers. And we spend more than one year to research the PCD technology.Hypereutectic aluminum alloy has good abrasion resistance, rigidity and fatigue resistance, but the improvement of its mechanical properties means that the cutting performance decreases. In order to increase the strength and reduce the weight of the material, OPT cutting tools company added silicon to the new aluminum alloy material. Silicon aluminum alloys are the same or lower than aluminum alloys, but their hardness, strength, and abrasion resistance have been significantly improved, and they also have better thermal expansion properties. The percentage of silicon added to the alloy depends on the maintainability and processability of the material. When the concentration of silicon in the aluminum alloy reaches the full saturation point, it is called a eutectic state; when the aluminum alloy is in a hypereutectic state, the silicon element will be precipitated from the aluminum matrix as solid particles. The main reason for the difficulty in cutting is due to the hypereutectic aluminum alloy. Only diamond tools with sharp cutting edges can be used for efficient machining and good surface quality. If the cutting edge of a PCD tool is passivated, silicon particles can be peeled from the substrate during the cutting process, thereby damaging the silicon wafer. Softer low-silicon aluminum alloys are not always easy to cut. The successful application of PCD inserts not only depends on the reasonable selection of tool geometry parameters and cutting parameters, sometimes tool suppliers need to provide solutions to problems encountered in tool use. Although diamond has extremely high hardness, its toughness is not as good as cemented carbide, and it is much lower than high-speed steel.

Recent advances in the design and use PCD cutting tools have provided new incentives for manufacturers in different industries to increase productivity. For example, the automotive industry's use of new large-particle monolithic PCD inserts makes it possible to efficiently machine hard-to-machine alloy cast iron, which was previously only possible by grinding. OPT Cutting Tools spent more than one year working on PCD technology. Albeit not because of the development of the cutting material itself.Most of the PCD inserts used today are "insert" type, which means they contain a small piece of PCD welded to the corner of the carbide insert. The insert inserts are factory-standard, so they can be mounted on the holders of standard carbide shanks and milling cutters. But unlike carbide inserts, insert PCD inserts are not indexable. They only provide one cutting edge. An important development in the use of PCD inserts is safer blade retention - especially for rotary tools. Today, you have a combination of wedges and screws that improve blade retention-even taper blades and wedges. we also try to use a traditional screw or clamping design, or a direct mounting chuck type cutter with PCD tabs soldered directly to the card body. Rigid fixtures are equipped to give users more reliable results with PCD and help them take full advantage of the productivity potential of PCD. OPT cutting tools company's PCD tools In the automotive industry, they include cylinder heads, cylinder blocks, intake manifolds, gearboxes and a large variety of aluminum wheels. Applications also extend to other industries such as home appliances, medical equipment and aviation.The range of parts covered is familiar with everything from washing machine parts to lawn mower bodies used in the home gardening industry. In order to replace cemented carbide with PCD in these applications, we were looking for higher productivity, as well as eliminating the need for longer tool life and part finish requirements for frequent tool changes.We found that to achieve these benefits, good chip evacuation is a key condition. The chip generation after PCD is so fast that you have to have an effective way to get them out of the work area continuously. And we can use coolant, air, oil mist, cooling air or any combination. Before using any method, you need to ensure good part quality and blade life. Finding different tooling techniques on the same machine is not straightforward. These days, we are using both traditional and advanced cutting materials to make them the best and most economical for every object of the application. And we provide PCD inserts, PCD reamers, PCD end mills and so on.

High-speed cutting has become a major development direction of modern manufacturing technology. Because the development and application of high-speed cutting tools directly affect the machining efficiency and processing quality of high-speed cutting, it is of great significance. In addition to the innovation and improvement of tool geometry and cutting angle, the development of tool cutting edge materials is also a key factor in improving cutting efficiency and reducing cutting costs. Since the mid-1970s, industrialized countries such as the United States, Germany, and Japan have successively developed polycrystalline diamond (PCD) cutters and used them for high-speed machining of non-metallic materials and non-ferrous materials, resulting in a significant increase in production efficiency. Cutting costs have fallen exponentially, so they are widely used in the automotive, aerospace, aerospace, and building materials industries. The PCD composite sheet polycrystalline diamond (PCD) composite sheet used by OPT Tools Co., Ltd. is composed of micron-sized diamond particles and metal powders such as Co, Ni, etc., which are uniformly mixed on a tungsten carbide (WC) substrate under high pressure and high temperature. New sintered blank. PCD composite board not only has excellent properties such as high hardness, high wear resistance, high thermal conductivity, low friction coefficient, low thermal expansion coefficient, etc., but also has good strength and toughness of cemented carbide. PCD briquettes are also conductive, so they can be cut to the desired blade using wire pliers. The cutter head is welded to the cutter body and sharpened to produce a PCD insert. Because the PCD tool is dynamically balanced Since the PCD tool is suitable for high-speed cutting, the dynamic balance of a rotating PCD tool is particularly important. In dynamic balance, the maximum allowable speed of the tool and the accuracy level of the dynamic balance (usually controlled at the G2.5 level) should be checked to obtain the allowable effective value of the imbalance rate. In order to achieve a dynamic balance of tool accuracy, gravity is often used (remove the appropriate weight in the appropriate part of the tool body) to allow the actual imbalance of the tool to be less than the allowable imbalance. Due to the superior performance of PCD tools, it is widely used in the processing of non-ferrous metals and non-metallic materials. OPT Tools Co., Ltd.'s PCD inserts, PCD reamers, PCD End Mills and woodworking tools are widely used in aluminum alloy cars and motorcycles: pistons, cylinders, wheels, gear boxes, pumps, intake manifolds, various housing parts And other aircraft, electromechanical: various cabinets, casings, compressor parts and other precision machinery: various cameras, copiers, measuring instruments and other general machinery: various pump bodies, hydraulic machines, mechanical parts and other copper-copper alloy internal combustion engines : Various types of shafts, bearings, bearings, pumps and other electronic equipment: various instruments, motor commutators, printed circuit boards and other general machinery: various bearings, bearings, valve bodies, housings and other hard alloy valve seats, Cylinder sintered products and semi-sintered products such as magnesium, zinc and other non-ferrous metals, non-metallic wood, various hardwoods, artificial boards, artificial stone ial wear-resistant fiber boards and products reinforced glass fibers, carbon fiber reinforced plastics and other rubber paper rolls, rubber rings and The actual selection of other ceramic carbon rings is based on the manufacture of PCD tools. According to the occasion, the characteristics of the material to be cut and the specific requirements of processing will have the appropriate grade and particle size PCD compact used as a tool bit. In general, diamonds with high volume concentration or large particle size have good abrasion resistance, while toughness is good when diamonds have low volume concentration or small particle size.

Shenzhen OPT Cutting tools Co., Ltd. is one of the leading manufacture for diamond cutting tools and carbide cutting tools in China. OPT cutting tools maintains the leading spirit in the manufacture of standard and customization high performance cutting tools, which mainly include PCD inserts, PCD end mills, PCD reamers, Woodworking tools, carbide inserts, carbide end mills, carbide taps and drills and son on. Today, we will introduce our PCD reamers to you. In recently, due to the wide application of PCD tools, PCD reamer has also entered the public's field of vision. OPT's PCD reamer's structure, water outlet design and guide design have anti-chip removal effect. High-precision dimensions effectively ensure strict workpiece requirements. OPT's PCD tools not only have stable quality and long service life, effectively improving production efficiency and reducing costs. PCD reamer is mainly used in the processing of automotive aluminum parts. However, improper use of reamer can accelerate tool damage. Therefore, pay attention to the following points when using PCD reamer: 1. The size of the aperture. If the hole diameter is too large, there will be burrs on the edge of the reamer. 2. Selection of cutting fluid. Cutting fluid is not suitable to make the reamer easy to wear, and the elastic recovery will make the reamer diameter smaller. 3. Processed materials. Inappropriate machining materials can make the sharpened surface very rough.

Nowadays, the technology of CNC milling machines is constantly developing and the functions are more perfect. Therefore, everyone has higher requirements for milling cutters on milling machines. There are many common types of milling cutters according to their uses. PCD end mills and carbide end mills are rotary tool mainly used for machining planes, steps, grooves, forming surfaces and cutting workpieces on a milling machine. OPT cutting tools breaks when cutting in or pulling out the workpiece: it can reduce the feed amount and cutting depth, and shorten the cutting edge length to the minimum required length. During the processing, the milling cutter has these advantages: 1. Reduce the feed amount and cutting depth 2. Passivate the tool 3. Replace the clamp or collet 4. High cutting number tool changes low cutting number to improve chip removal and prevent chipping 5. Change from dry milling to wet (using cutting fluid) and use it with a vortex tube gun to reduce the temperature of the tool and prevent the tool from overheating. If the feed direction of the wet milling feed is changed from the front to the feed from the oblique rear or horizontal direction, the coolant flow rate should be sufficient. Replacing the clamp or collet The tip of the blade is chipped: 1. Chamfer the corner by manual dressing 2.Change up milling to down milling. At the same time, we also provide PCD Inserts, PCD reamers, Woodworking tools, carbide inserts, carbide taps, carbide diils and so on. So, please consult us quickly.

The choice of tool material has a great impact on tool life, processing efficiency, processing quality and processing cost. When cutting tools, they must withstand high pressure, high temperature, friction, shock and vibration. Therefore, the tool material should have some basic skills. Here we take the OPT cutting tools as an example. 1. Features of OPT cutting tools: ① Extremely high hardness and wear resistance: Natural diamond is the hardest substance that has been found in nature. Diamond has extremely high abrasion resistance. When machining high-hardness materials, the life of diamond tools is 10 to 100 times or even hundreds of times that of hard alloy tools. ② Has a very low coefficient of friction: the friction coefficient between diamond and some non-ferrous metals is lower than other tools, the coefficient of friction is low, the deformation during processing is small, and the cutting force can be reduced. ③The cutting edge is very sharp: The cutting edge of the diamond tool can be ground very sharply. The natural single crystal diamond tool can be as high as 0.002 ~ 0.008μm, which can perform ultra-thin cutting and ultra-precision machining. ④ Has high thermal conductivity: PCD cutting tools has a high thermal conductivity and thermal diffusivity, cutting heat is easily dissipated, and the temperature of the cutting part of the tool is low. ⑤ Has a lower thermal expansion coefficient: The thermal expansion coefficient of diamond is several times smaller than that of cemented carbide, and the change in tool size caused by cutting heat is small, which is particularly important for precision and ultra-precision machining that requires high dimensional accuracy. 2. Application of PCD cutting tools. OPT cutting tools are mostly used for fine cutting and boring of non-ferrous and non-metal materials at high speeds. Suitable for processing various wear-resistant non-metals, such as FRP powder metallurgy blanks, ceramic materials, etc .; various wear-resistant non-ferrous metals, such as various silicon aluminum alloys; various non-ferrous metals finishing. The disadvantage of diamond tools is that they have poor thermal stability. When the cutting temperature exceeds 700 ° C to 800 ° C, their hardness is completely lost. In addition, it is not suitable for cutting ferrous metals because diamond (carbon) is easy to interact with iron at high temperatures. The action of atoms converts carbon atoms into a graphite structure, and the tool is easily damaged.