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  • Notices To Be Aware Of During The Operation Of The Sharpening Machine

    The Semi-auto tool sharpening machine is designed to extend the life of your tools and increase the value of your tools for all tool users and companies. From traditional whetstones to today's sharpeners, the ever-changing technology has quietly occurred on the sharpeners. The emergence of these technologies has greatly facilitated the convenience of all prop users and businesses. So what do we need to pay attention to during the operation of the sharpener? The operation of the sharpening machine First of all, during the operation of the sharpener, all of our sharpener manufacturers emphasize the use of the customer's docking equipment. The sharpening of the tool must ensure its accuracy, so we must control the amount of feed each time. Small the feeds amount is reciprocally grounded many times. And the normal feed amount is controlled between 0.01-0.02mm. Which prevents the excessive feed amount from causing excessive heat. The tool softens and compresses deformation. And even causes the paste cutter to make the cutter edge, not at the same level. Secondly, we must pay attention to the maintenance and care of the sharpening machine. In fact, this aspect needs to be done very simply. But it needs long-term maintenance by the enterprise and equipment operators. If you feel that the equipment is used first, wait until the use time feels long and then go to the maintenance. Therefore, the accuracy and service life of the sharpening machine will be greatly affected. And the processing precision will reduce, and the whole equipment or core components may damage. Therefore, it is hoped that all individuals and enterprises that use sharpening machines can establish equipment maintenance rules. Regularly maintain maintenance according to maintenance requirements. And do small things to maintain equipment maintenance. So that sharpener can always play a big role, saving enterprises. More expenses and costs. Under normal conditions, the grinding wheel of the sharpening machine should operate and trimmed at a normal time interval. The trimming is performed with a diamond device attached to the top of the rod. The strut is connected to the arm, and the arm is provided with a feed bolt. If the blade device of the sharpening machine is fixed on the wheel plate, it is particularly necessary to trim the wheel when it becomes dull or its sharp corner is damaged. Otherwise, the surface roughness of the cutting tool is poor and the heat is burned out. Wheel dressing for Semi-auto tool sharpening machine 1. Loosen the assembly of the clamping nut. And move the diamond dresser to the right and bring it close to the edge of the grinding wheel. 2. Adjust the distance between the dresser and the grinding wheel to about 1MM and lock the clamping nut D. 3. Turn the feed bolt until the shaper touches the grinding wheel. When the bolt is turned 1/5 times, the layer will be repaired by about 0.2MM. Any tool will wear more or less different degrees of wear during the process of use, and wear will occur in the subsequent tool grinding process. The greater the wear, the worse the sustainable use of the tool. But from now In many cases in the market, a large part of the overall wear of the tool is unnecessary. Therefore, we need to minimize the amount of unnecessary wear that may occur during the use of the entire tool. It is more durable and more efficient to use continuously. Conventionally, the high-speed cutting of the cutter tool wear is mainly divided into the front and the back, but the most frequently occurring wear condition is mainly the wear of the subsequent blade surface. As the main cutting performance surface, this part of the wear is inevitable. And with the use, time is getting longer and longer, and the width of the worn portion of the flank face is becoming larger and larger. Thereby reducing the cutting performance of the planer. Even in the process of intermittent high-speed cutting, the cutting knife will appear to be too severe in some parts, resulting in a small gap in the cutting edge, which is what we often say in the industry. If the previously selected tools are of high quality and good durability, these tools can still process continuously, or they can ground by a sharpener to restore their original sharpness, enhance subsequent processing and extend their use time. The more wear condition of another cutting knife will occur at the edge of the cutting knife. Compared with the single-sided force of the positive cutting tool, the single-angle force requires the support of the hardness and toughness of the cutting tool. In the absence of one, a large degree of wear at the corners of the corners may occur during subsequent processing.
  • The Cutting Process Of PCD Tools

    Because of the high hardness and wear resistance of PCD composite tablets, special processing technology must be adopted. The processing of the PCD composite sheet mainly adopts several technological methods such as EDM line cutting, laser machining, ultrasonic machining, high-pressure water jet, etc. The comparison of technical characteristics is shown in table 1.Process Method – Process CharacteristicsEdm – highly concentrated pulsed discharge energy and powerful discharge explosive force make the metal in PCD material melt, some diamond graphitization, and oxidation, and some diamond fall off.Ultrasonic processing – low processing efficiency, large consumption of diamond powder, dust pollution.Laser processing – non – contact processing, high efficiency, small deformation, poor process.Among the above machining methods, the effect of EDM is better. The existence of bonding Bridges in PCD makes it possible to manufacture EDM composites. Under the condition of the working fluid, the pulse voltage is used to make the working fluid near the electrode metal form a discharge channel, and locally generate discharge sparks. Instant high temperature can make the polycrystalline diamond melt and fall off, so as to form the required triangle, rectangle or square blank of the tool head. Electrical discharge machining efficiency and surface quality of PCD compact by cutting speed, PCD grain size, layer thickness, and quality of electrodes. And the influence of such factors as the selection of proper cutting speed is critical, the experimental results show that increasing the cutting speed can reduce machining surface quality, and the cutting speed is too low will produce “archwire” phenomenon, and reduce the cutting efficiency. Increasing the thickness of the PCD blade also reduces the cutting speed.
  • Diamond Introduction

    What is the diamond? Diamond is what we call diamond, a mineral made of pure carbon. Diamond is the hardest substance in nature, so it has many important industrial applications, such as fine grinding materials, high-hardness cutting tools, various kinds of drills, wire drawing dies. It is also used as part of many precision instruments. Diamonds come in all kinds of colors, from colorless to black, especially colorless. They can be transparent, translucent or opaque. Most diamonds have a yellow tint. Diamond has a very high refractive index and a very high dispersion, which is why diamonds reflect colorful flashes. Diamonds glow blue-green when exposed to x-rays. Diamonds are produced only in kimberlite tubs. Kimberlite is their native rock, and diamonds from other places are carried by rivers, glaciers, etc. Diamonds are generally granular. If the diamond is heated to 1000℃, it will slowly turn into graphite. Diamond and graphite belong to the elemental form of carbon. It is a kind of super-hard, wear resistance, thermal sensitivity, heat conduction, semiconductor and penetration and other excellent physical properties, known as the "king of hardness" and the king of gems lauded, the crystal Angle of a diamond is 54 degrees 44 minutes 8 seconds. In the 1950s, the United States successfully manufactured synthetic diamonds from graphite under high temperature and high pressure. At present, synthetic diamond has been widely used in production and life, but it is still difficult to make large particles of a diamond. Characteristics of Diamond - mineral raw material The chemical composition of natural diamond is C, which is the same as graphite, which is the same as carbon. In the chemical composition of minerals, it always contains Si, Mg, Al, Ca, Mn, Ni and other elements, and often contains Na, B, Cu, Fe, Co, Cr, Ti, N, and other impurities, as well as carbohydrates. The diamond mineral crystal structure belongs to the coaxial crystal system homopolar tetrahedral structure. Carbon atoms are located at the top and center of the tetrahedron and have a high degree of symmetry. The common crystal shapes are octahedron, diamond dodecahedron, cube, tetrahedron, and hexahedron. Mineral brittle, shell-shaped or staggered fractures, cleavage along the cleavage plane of the crystal at low impact, medium or complete cleavage with the parallel octahedron, incomplete cleavage with the parallel dodecahedron. The mineral is pure with a density of 3 470-3 560kg/m3. The color of a diamond depends on the degree of purity, the type and content of impurities contained in it. Extremely pure diamond is colorless, usually yellow, brown, gray, green, blue, milky white and purple in different degrees. Pure transparent, translucent or opaque with impurities. Under cathode ray, X-ray and ultraviolet ray, different green, sky blue, purple, yellow-green and other colors of fluorescence will be emitted. Light bluish phosphorescence in dark room after sunlight exposure. Diamond luster, few grease or metallic luster, high refractive index, generally 2.40-2.48. Thermal conductivity of diamond general 136.16 w/(m k), including Ⅱ type a diamond high thermal conductivity, at liquid nitrogen temperature is 25 times that of the copper, and along with the rise of temperature fell sharply, such as 5 times at room temperature for copper. The specific heat capacity increases with temperature rise, such as 399.84j/(kg·k) at -106℃ and 472.27j/(kg·k) at 107℃. The coefficient of thermal expansion is very small and increases with the rise in temperature. For example, it is 0 at -38.8℃ and 5.6×10-7 at 0℃. The ignition point is 720 ~ 800℃ in pure oxygen, 850-1 000℃ in air, and 2 000-3 000℃ in oxygen. The chemical properties of diamond are stable, with acid and alkali resistance. It does not react with concentrated HF, HCl, and HNO3 at high temperatures. It only oxidizes slightly on the surface when boiled with the mixture of K2Cr2O7 and H2SO4 in the molten body of Na2CO3, NaNO3, and KNO3.Corrosion in high-temperature gas of O, CO, CO2, H, Cl, H2O, and CH4. Diamond also has non - magnetic, poor conductivity, hydrophilic hydrophobicity, and friction electricity. Only Ⅱ b type diamond with good performance of semiconductor. According to the diamond nitrogen impurity content and differences in thermal, electrical and optical properties, the diamond can be divided into Ⅰ type and Ⅱ type two kinds, and further subdivided into Ⅰ, Ⅰ b, a and b Ⅱ Ⅱ four subgroups. Ⅰ type diamond, especially Ⅰ type a, for a common ordinary diamond, accounts for about 98% of the total natural diamond. Ⅰ type diamond all contains a certain amount of nitrogen, has good thermal conductivity, poor conductivity, and good crystal shape. Ⅱ type diamond is rare, with little or almost no nitrogen, good thermal conductivity and surface characteristics of the crystal. Ⅱ subtype b diamond half electrical conductivity. Due to the excellent Ⅱ type diamond, so much used in space technology and cutting-edge industries.
  • Cubic Boron Nitride (CBN) Tool

    Turning high chromium cast iron slurry pump tool – cubic boron nitride (CBN) toolSlurry pump as everyone knows, bad work environment, higher requirements for product performance, the main parts of pump shell, the impeller as worn parts, high chromium cast iron is often used as the main material, but the high hardness of the high chromium cast iron, and belongs to the intermittent cutting impeller, the cutting tool abrasion resistance and impact toughness of the demand is higher. So in the rough car high chromium cast iron slurry pump parts to choose what tool is suitable? With the continuous research and development of the tool industry, CBN tools appear new material, can effectively solve the high chromium iron slurry pump difficult processing problem.Features Of Cubic Boron Nitride (CBN) Tool1. The main material of high chromium cast iron slurry pumpAs a result of the slurry pump working conditions, often working in corrosive material such as strong acid, strong alkali environment, lead to short service life, the service life of the slurry pump in order to get high. High hardness and wear resistance, often use high strength and high hardness, strong corrosion resistance and abrasion resistance of high chromium alloy cast iron as the main material of slurry pump.But the high chromium alloy cast iron is very difficult to process, not only the hardness is high, and the allowance is large, how to process?2. High manganese steel slag slurry pump parts processing technologyThere are many parts of the slurry pump, the main components are impeller, pump shaft, jacket, front guard plate, rear guard plate, pump shell, and shaft seal device. The following is a brief introduction of slurry pump parts impeller and pump shaft (as shown below) processing technology.Impeller processing technology: coarse car inlet port ring and front plate surface — fine car front port ring and inner hole (to ensure concentricity requirements) — keyway (to ensure keyway symmetry) — drilling impeller balance hole (to ensure uniform size distribution) — inspection (balance test) — inspection storage.Processing technology of pump shaft: rough car – heat treatment (tempering) – semi-finishing car – finishing – milling keyway – grinding – check storage.3. How to select tool materials for processing slurry pump parts with large spare capacity and high hardness?Slurry pump parts belong to the majority of casting parts, residual, and the size of slurry pump parts, such as the workpiece in order to ensure the completion of the workpiece will be appropriate in the casting process to increase the residual. For pump parts with large spare capacity and high hardness, it is necessary to pay attention to the performance and hardness of tool materials when selecting tool materials.At present, there are three kinds of tools for processing slurry pump parts: the carbide tool, ceramic tool, and CBN tool. Personally, the CBN tool is more suitable for processing slurry pump parts.From the hardness point of view: CBN tool > ceramic tool > carbide tool. From the toughness point of view: carbide tool > CBN tool > ceramic tool.And developed a new CBN tool material – non – metal adhesive CBN tool bn-k1 material, in the processing of the slurry pump field has a good development.
  • Grinding Process Of PCD Cutting Tool

    The high hardness of PCD makes its material removal rate very low (even only 1/10000 of the removal rate of cemented carbide).At present, the grinding technology of PCD tool mainly adopts ceramic bond diamond wheel to grind.Because the grinding between grinding wheel abrasive and PCD is the interaction between two kinds of materials with similar hardness, the grinding law is more complex.For high grain size and low speed grinding wheels, the use of water-soluble coolant can improve the grinding efficiency and grinding accuracy of PCD.The choice of binding agent for grinding wheel depends on the type of grinding machine and processing conditions.Because the EDG technology is almost not affected by the hardness of the workpiece, it has great advantages to use EDG technology to grind PCD tool.For the welded PCD blade, the tool grinder can be used. The grinding wheel spindle swings from left to right and the rigidity of the machine tool can make grinding more simple and effective. Demina company has produced BT-150D CNC tool grinding machine, which can help the manufacture to grind PCD tools with high efficiency. BT-150D is made of solid casting with high quality. It can meet grinding requirements of any hard material.  The machine has a grinding fluid shield to ensure that the grinding fluid does not splash everywhere. The optical component and CCD camera are properly protected from splash by metal cover. The machine is equipped with lights and the bedside lamp inside. Cross work table is adopted with precision guide rail and two screw tightening device. This eliminates the gap, can withstand greater grinding resistance without cutter back-off. Welcome new customers to go to our factory to visit.
  • HRC55 Above Hardened Steel Gear Hard Turning Tool -CBN Blade

    Hardened steel gear is one of the typically difficult to process materials, the common material is 20CrMnTi, 42CrMo. After quenching hardness hrc58-62, the traditional tools are generally not processed, not moving, is not wear or break. At present, the main processing HRC55 above hardened steel gear hard turning tool for CBN blade.CBN blade hard turning HRC55 above the advantages of quenched steel gear(1) The hardness of the CBN tool can reach hrc95-100, and the gear can be hard turned easily (hrc58-62). The bn-h05 material is continuous hard turning gear, and the surface finish reaches Ra0.4.(2) CBN tool USES a special non-metal adhesive, intermittent cutting does not break. Even if the processed gear face has a group of holes that will not break, bn-h21 material is the strong intermittent hard turning gear is an ideal cutting tool.(3) CBN tool hard turning gear life is long, but also can provide coated blade, life extension at least 35% more, cost-effective, cutting performance is stable, bn-h10 C25 coated CBN tool hard turning gear effect is significant.The cutting parameters of hardened steel gear over HRC55 are not high compared with gray iron, especially when the rigidity of the machine tool is not good, it is easy to go too fast and vibrate the knife, and the blade is easy to collapse.Demina PCBN tool grinder can grind the CBN tools with high quality. Please to search our website:
  • Grinding Machine Knowledge

    Grinding machine introduction General grinding tools (such as grinding wheel, sand block, and belt) or abrasive (such as a grinding agent) for cutting machine called grinder. Grinding is a kind of high-speed cutting method which is developed to meet the needs of fine machining and hard surface machining. Grinding: refers to the use of abrasive materials to cut the processing method. Grinding: it is the use of a high-speed rotating grinding wheel as a cutting tool, the workpiece cutting processing. Features of grinding processing 1. A grinding tool for the multi-edge cutter. 2. High grinding speed. 3. It can grind soft material and can grind hard material. 4. It can be cut very thin surface and can have a very high removal rate. 5. Fine surface with extremely high accuracy. 6. The grinding wheel has the function of "self-sharpening". The basic movement of grinding 1. The main movement: directly cut off the metal on the workpiece into the chip movement, called the main movement. 2. Feed movement: the movement of the whole surface of the workpiece by continuously cutting the metal being cut. The main motion and feed motion are usually called surface shaping motions. Cutting factors 1. Backbite 2. Feed 3. Cutting speed (cooling fluid role) 1. Cooling role 2. Lubrication role 3. Cleaning role 4.  Rust Kinds of grinding machine General grinding machine Y (tooth), gear grinding machine S (thread), thread grinding machine, general grinding machine has external cylindrical grinder centerless grinder internal cylindrical grinder. Structure of grinding machine 1.Body 2. Headframe 3. Inner circle grinding wheel frame 4. Outer circle grinding wheel frame 5. Tailstock 6. Guide rail surface 7. Slide saddle and transverse feeding mechanism 8. Feeding rotatable handwheel 9. The table on the machine tool
  • Steps Of Cutting Edge Grinding Of Turning Tool

    Methods And Steps Of Cutting Edge Grinding Of Turning Tool:1. First, grind off the welding slag on the front and the back and then smooth the bottom surface of the lathe tool. The alumina grinding wheel with size no. 24-36 can be used.2. Roughen the hilt of the main back and the secondary back: when sharpening the blade, tilt the turning tool at the horizontal position of the outer cylinder of the grinding wheel slightly higher than the center of the grinding wheel at an Angle 20-30 larger than the rear Angle on the cutting tool body. And move slowly from left to right to sharpen the main rear Angle and the secondary rear Angle on the cutting tool body. Optional particle size is 24-36, hardness is medium-soft alumina grinding wheel.3. The main back of the rough grinding tool body: when the grinding tool face is finished. The tool handle should be kept parallel to the axis of the grinding wheel, and the bottom plane of the tool body should tilt toward the direction of the grinding wheel at an Angle 20 larger than the main back Angle. In the process of grinding, first press the polished rear clearance surface of the lathe tool against the outer circle of the grinding wheel. And take the position close to the center of the grinding wheel as the starting position of the grinding wheel, then make the grinding wheel continue to close to the grinding wheel, and slowly move left and right. When the grinding wheel is sharpened to the edge of the blade, it can be finished. In this way, the main Angle and the main Angle can be sharpened at the same time. Silicon carbide grinding wheel no. 36-60 can be used.4. Coarse grinding Angle after vice: behind the mill vice, handle the tail should be turned to the right a pair of Angle Angle, tilt wheel direction turning tool at the same time the bottom flat face a bigger than vice Angle after 20’s perspective. The concrete method and the coarse grinding of the knife body is approximately the same god behind, behind different is coarse grinding wheel should be grinding to the point. It can also be worn outside Angle and side Angle at the same time.5. Rough grinding front: rough grinding the front of the turning tool with the end face of the grinding wheel, and grinding the front Angle at the same time.6. grinding chip groove: there are two kinds of chip grooves, one is linear, suitable for cutting harder materials. One is the circular arc, which is suitable for softer materials.The chip groove of manual grinding is generally an arc shape, and the corner of the outer circle of the grinding wheel and the end face should be polished into a corresponding arc with the diamond pen of the grinding wheel. If the cutting edge grinds a linear chip groove, the intersection of the grinding wheel must be sharpened. The cutting edge can be ground downward or upward, but the width of the chamfering edge should be considered when selecting the cutting edge groove.Notes for cutting chip groove:The corner of the grinding wheel should always be sharp or have a certain shape of the arc when the edge of the grinding wheel has a larger edge, it should be trimmed in time.The starting point of the ground should be at a distance from the tooltip and the main cutting edge. The distance from the main cutting edge should be half of the width of the chip groove plus the width of the chamfering edge.When sharpening, pay attention to not too much force, turning tool along the direction of the handle slowly move. The small size of a forming, large size can be divided into rough grinding and fine grinding process.7. Fine grinding main rear and vice rear: before fine grinding, it is best to trim the grinding wheel, keep the grinding wheel rotating smoothly, the bottom plane of the lathe tool depends on the adjusted bracket, and make the cutting edge lean gently on the end face of the grinding wheel, along the end face of the grinding wheel slowly move left and right.The optional grinding wheel size of 180-200.8. Grind negative chamfering: the inclined Angle of negative chamfering is -50–100, and the width is b= (0.5-0.8) f. For the use of carbide turning tool in front of the Angle, and the strength of the material is particularly low is not suitable to use negative chamfering.When grinding the negative chamfering, the force is slight, so that the back end of the main cutting edge swings toward the tip. When the knife grinding can use the straight grinding method and the cross grinding method, it is best to use the straight grinding method.9. Grinding the transition edge: the method of grinding the transition edge is the same as that of the polished blade surface. When grinding the turning tool of harder materials, negative chamfering can also be made on the transition edge.10.Manual grinding of turning tool: grinding with a whetstone, requiring smooth movement and even force.
  • Tool Setting Method For BT-150D 4-axis CNC Tool Grinder

    At present, the high-end CNC tool grinding machine is developing in the direction of four-axis control. The workpiece can finish with multi-faced profile machining in one clamping. This is the four-axis CNC machine tool, which will become the trend of development and the overlord of the machining industry. Enterprises must install equipment. The Demina machining center has four axes: A-axis, C-axis, and XY. The A-axis and C-axis can combine with the XY three-axis to process complex spatial surfaces. This allows the workpiece to be subdivided into arbitrary angles. Out of the inclined surface, inclined holes, etc., can process the complex workpiece. Tool setting method for 4-axis CNC tool grinding machine 1. Tool setting of CNC milling machine: Assume that the part is the asymmetrical part, and the blank has been measured to length L1 and width L2. The diameter of the flat end mill has also measured. After the workpiece is clamped on the milling machine table, it is manually operated. The specific steps are as follows. Manual tool setting: first make the tool close to the left side of the workpiece (using jog operation to start with micro-cutting), press the set programming zero key, and the CRT shows X0, Y0, Z0. Then Complete the programming zero settings in the X-direction. Then move the tool closer to the front side of the workpiece, keep the tool Y direction, and return the tool X. When the X coordinate value of the CRT is 0, press the programming zero setting button to complete the programming zero settings in the X and Y directions. Finally, raise the Z-axis and move the tool. Considering the existence of the milling cutter radius, when the X coordinate value is displayed on the CRT (L1/2 + milling cutter radius) and the coordinate value of Y is (L2/2+ milling cutter radius). Move the bottom of the milling cutter closer to the upper surface of the workpiece and press the programmed zero setting button. The X, Y, and Z coordinate values ​​on the CRT screen are cleared to zero (ie, X0, Y0, Z0). The system has completed the programming zero setting function. The cutter point of the milling cutter is set on the center of symmetry of the workpiece. That is the workpiece origin of the workpiece coordinate system. Set the workpiece coordinate system: At this point, the current position of the tool (the tool point of the milling cutter) is at the programmed zero points (ie the workpiece origin). Due to the manual trial cutting method, the adjustment is simple, reliable, and economical. So it is widely used. 2. The toolset of the CNC lathe. The method of tool setting for CNC lathe is basically the same. First, after the workpiece is clamped on the three-jaw chuck, it is manually operated. The specific steps are as follows. (1). Try cutting the knife first with the selected tool to the outer surface of the workpiece. Keep the X dimension unchanged, Z direction retract, press the programming zero key, CRT screen display X, Z coordinate value Clear to zero (ie X0, Z0). Then, stop the spindle and measure the diameter D of the workpiece. Then, the workpiece end face is cut. When the X coordinate value displayed on the CRT is -(D/2), press the set programming zero key. The X and Z coordinate values ​​on the CRT screen are cleared to zero (ie, X0, Z0). The setting function of the programming zero points is completed inside the system. (2) Establishing the workpiece coordinate system The current position of the tool nose (tool location of the turning tool) is at the programmed zero points (ie the workpiece origin). (3). Reference point operation Use ZERO (refer to the reference point) way to return to the reference point operation, establish a coordinate system. At this time, the coordinate value of the current position of the tool holder center (tool reference point) in the coordinate system will be displayed on the CRT. BT-150D 4-axis CNC tool grinder form Demina Demina BT-150D 4-axis CNC tool grinder is a CNC machine tool for machining shaped workpieces. For example, it specializes in machining molds, specializing in machining models and various complex parts. It has the function of spatial multi-dimensional surface special-shaped milling and also specializes in hollow machining, beveling, and special-shaped holes. The tetrahedron is a CNC machine tool that performs plane machining on four faces at the same time. This is the essential difference between the four-sided and four-axis CNC machine tools. Demina BT-150D 4-axis CNC tool grinder, nearly 10 years old, witnessed by global users, the brand is trustworthy. The 4-axis CNC tool grinder is suitable for the machining of non-metallic materials as well as aluminum molds, models and profiled parts. The processing speed is fast, the surface roughness of the processed molds, models and products is high. The processing ability is strong, the auxiliary workpiece is not needed in the processing process, and one molding process saves time and labors, which is a weapon for enterprise development!
  • Grinding Fluid Kinds

    The cutting speed of grinding is high, so the power consumed during cutting is large, and most of its energy is converted into heat energy. This heat does not pass deep into the workpiece but concentrates on the surface of the workpiece. So there is a large temperature difference between the surface and the inside of the workpiece. When the surface temperature is very high (the temperature of the grinding point can reach more than 1500℃ in an instant, and the average temperature of the working contact area is 500~800℃), the processed surface will appear burns and thermal deformation, affecting the quality and finish of the processed surface. So in the whole grinding system, the correct selection of grinding fluid is also an important method to improve the surface quality of the workpiece and prolong the service life of the grinding tool.Grinding Fluid KindsGrinding fluid can be divided into oil-based grinding fluid and water-based grinding fluid according to the chemical composition of the oil.1. The water-based grinding fluid is divided into emulsion grinding fluid, microemulsion emulsion grinding fluid (also known as semi-synthetic grinding fluid), and synthetic grinding fluid.Emulsified grinding fluid. It is mainly composed of emulsified oil and water.The concentrate consists of mineral oil 50 ~ 80%, fatty acid 0 ~ 30%, emulsifier 15 ~ 25%, antirust agent 0 ~ 5% and preservative.2. Forming grinding fluid. Do not contain mineral oil, concentrated by a variety of water-soluble functional additives. Extreme pressure agent, the oily agent, anti-rust agent, surface active agent, and defoaming agent, etc, diluent heat faster, clean sex strong, transparency, good, have good visibility of workpiece. And half a synthetic grinding liquid ratio, its stability and ability to resist corruption is strong, but relatively poor lubrication performance.Semi-synthetic grinding fluid.The concentrate consists of mineral oil 5 ~ 30%, fatty acid 5 ~ 30%, extreme pressure agent 0 ~ 20%, surfactant 0 ~ 5% and rust inhibitor 0 ~ 10%.Semi-synthetic grinding fluid is transparent or translucent, which not only has good lubrication and cooling performance of emulsified grinding fluid but also has the advantages of excellent cooling, cleaning, and transparency of synthetic grinding fluid.
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