quality control has guiding significance

Sheet wheel performance depends largely on the merits of using abrasive quality, good quality abrasives, grinding wheels, high grade, and in the more expensive price. As the domestic high-grade bauxite resource depletion, a variety of raw materials and coal prices in mid-rise, coupled with energy saving the environment forced shut down, corundum prices are cutting discs  rising fast, from time to time will be in short supply. How rational use abrasives, improve market competitiveness, is the most important enterprises grinding technology considerations.Best approach is to not participate in the core sheet wheel portion of the cutting action of poor quality with low prices instead of secondary abrasive, abrasive cutting quality full performance, lower manufacturing costs. This approach resin bolts and large diameter cylindrical grinding wheel resin grinding wheel has been widely used. For thin grinding wheel, since the intermediate screening, the bottom and the top to separate the feed, if the external and the core are bandsaw blades  stepwise feeding, in the process to implement quite difficult, is still only vision in the future, if successful, cost reduction, profit improvement , on sheet wheel manufacturing is undoubtedly a far-reaching "technological revolution."Compare prices now wear suitable strategy for various consumer groups, in accordance with abrasive made of different grades of abrasive products, the best abrasive used in most need sheet wheel, avoiding production of low-grade abrasive grinding wheels with high-grade, as far as possible best use, cost-effective in improving the premise, a great effort for each grade of the product have done "extreme."High-grade sheet wheel stable, targeted, reproducible tamping rammer  production has generally adopted a sand, special products and even to use zirconium corundum, calcined alumina abrasive and post-processing. The market is dominated by imported products, most cost-effective production of high sheet is not high, not discrimination, targeted not strong, still need further research and development efforts.

wheel speed hazards arising from the work

Not only cause wheel breakage near in death or serious injury, but can also cause serious damage to the plant or housing. Although the manufacturer has taken various preventive measures, but if used carelessly careful wheel still occur occasionally break or crack accidents. Applications to take the following precautions concerning:1. Handling and  diamond bandsaw blades storageIn shipping and handling process, if moisture enters phenolic resin bonded grinding wheel, it will reduce its strength; ceramic bonded grinding wheels and, then very sensitive to temperature changes repeatedly; uneven absorption of moisture causes the wheel out of balance . Therefore, in the loading and unloading wheel must be handled with care, and to be placed in a dry and sheltered place, in order to maintain the grinding wheel normal state.2 crack detectionDeal with the new wheel checked to ensure drying and grinding wheels from 9 inch saw blade  damage. The easiest way is to tap the wheel with a mallet. Intact ceramic grinding wheel will be issued by the crisp sound. Wheel with an organic adhesive bond will be issued muffled sound, but with a defective wheel crushing sound is emitted distinction. For suspected wheel, they should check that the delivery person.3 TestOfficial use of the new wheel should be performed before full trials and should be carefully observed. In the Diamond tool  wet, the wheel should be idling for some time, get rid of the water. Otherwise, the water will accumulate in the lower part of the wheel, causing the wheel imbalance, resulting in next time may burst.

the grinding quality materials requirements

Cylindrical grinding, the correct choice of the grinding wheel is to ensure workpiece quality, increase productivity, reduce costs the important part. Select wheel features (abrasive, grain size, hardness, combined etc.), you must make a good abrasive grinding performance; grinding wheel with  concrete diamond blades suitable self-sharpening; generated when grinding wheel grinding force, grinding heat is relatively small; make easy dulled abrasive grinding wheel, have a higher life expectancy; reach workpiece machining accuracy and surface quality requirements, the machined surface is not easy to produce burns and cracks, grinding wheel, the workpiece and the grinding quality materials requirements are two key factors that can not be ignored.Width of grinding wheel speed is too high workpieces, grinding is easy to  granite polishing pad produce self-excited vibration, the surface roughness increases wheel life low; workpiece speed is too low, so that the surface is easy to burn. Generally the wheel speed and workpiece speed ratio between 120-200. Smaller diameter of the workpiece should be whichever is greater.Two radial feed speed selectionRadial feed speed is mainly affected by process system rigidity, workpiece shape accuracy limitations, when the process system less rigid, high precision shape of the workpiece, the radial feed speed should choose a small value, or deformation of the workpiece, which is difficult to ensure accuracy. Generally within the scope of the 0.5-0.7mm/min selection.

grinding fluid supply requirements more effectively

By spray method for increasing the pressure (1MPa above), increasing the grinding fluid jet velocity, airflow speed rotating grinding wheel broke, the grinding fluid flow into the grinding zone  diamond blades effectively, rapidly remove heat, improve the grinding effect. Used cylindrical grinding nozzle structure, the use of nozzles spaced high-speed airflow baffle will ensure the smooth grinding fluid injected into the grinding zone, while preventing grinding fluid splash.
 When the wheel speed is high, the wheel periphery airflow also strengthened, then you can take appropriate measures, such as adjusting the grinding fluid nozzle orientation. In the air force concrete diamond blades  jet force and effect, so just grinding fluid is injected into the grinding zone; mounting angle of the nozzle spray liquid should just make some up blocking airflow, partially into the grinding zone. Furthermore, you can increase the injection pressure and grinding fluid injection amount, reducing the increase of the nozzle outlet cross-sectional area and the nozzle width.
 High-speed grinding, grinding fluid supply requirements more effectively, use reflective supercharger. When an ordinary pressure grinding fluid from the tube into, sprayed onto the wheel surface through holes, grinding fluid speed centrifugal force is reflected back diamond core drills  booster bottom. The bottom of the grooves and ribs, grooves and the grinding fluid turbulence vortex, at the top of the convex rib dynamic pressure generated from the surface toward the wheel washing action, the cooling effect is significant flushing. The gap of the grinding wheel surface ribs equals 1.5 ~ 5mm.

Diamond high hardness and excellent mechanical properties make diamond tools

 Diamond high hardness and excellent mechanical properties make diamond tools for processing a variety of hard materials become indispensable effective tool. Metal base of the diamond matrix adhesion (matrix package Xiang ability) that affect the life and performance of diamond tools is one of the main factors.
The diamond and general metals and  alloys having a high interfacial energy between, resulting in the diamond particles can not be generally low-melting alloy infiltration, poor adhesion, in the conventional manufacturing techniques, the diamond particles alone after the carcass shrink the mechanical gripping force embedded in the metal matrix of the  12 inch saw blade carcass, but not form a strong chemical bonding or metallurgical combine, resulting diamond particles in the work easily with metal base carcass separation, greatly reducing the diamond tool life and performance levels. Most of the diamond impregnated type tool utilization is low, a lot of expensive diamond in the work lost in the litter fall into. Lin Zengdong other first surface metallization using diamond diamond surface to impart a number  drill bits of new features, such as excellent thermal conductivity, good thermal stability, improving its original physical and chemical properties of the metal or alloy to improve its wettability of the solution, etc.
Diamond surface metallization problem , it caused a domestic diamond tool manufacturing industry's attention. Many people committed during the sintering process to achieve the diamond surface of metal in the matrix material or on the diamond surface to add the pre-glue strong carbide metal powder (which is not heated before the diamond, not associated with a chemical coating reaction only belong diamond coating) to expect them hole saw blades  to realize the sintering process chemical bonding of the diamond. Although the literature has demonstrated some metal such as tungsten (not oxidized) at a lower temperature (800 ℃ or so) WC can be formed on the surface layer of the diamond, but the diamond surface to achieve the pre-metallization process used to view, to be in a vacuum conditions, 600 ℃ heating above one hour to get the desired adhesion. Impregnated with the most commonly used cutting tool diamond sintering conditions of view, non-vacuum or low vacuum of not more than 900 ℃ heated for 5 minutes or so

Process for producing diamond saw blade can be described as necessary

 Diamond saw blade manufacturing process what is it? Below to learn more about it!
Process for producing diamond saw blade can be described as necessary under pressure in metal powder sintering process, a powder metallurgy process: metal powder mixed dish symmetry at high temperature (800-1000 ℃) and the inevitable pressure (180 - 250Kgf/cm2), through the diffusion between the powder particles, welding, compounds, recrystallization and  carbide saw blades the like a series of physical and chemical impregnation, has a certain shape to form a sintered body and the machine functions, namely head.small blade used Precautions When using the saw, there must skids, and in the hands or feet fixing the other end of sawing wood to produce unexpected slip roll, saw themselves need to maintain smooth, do not bend, so the saw body deformation. If you saw a oiled, it certainly erased after the first oil used. When used to pay attention to the direction of force saws, saws launch force, back when the relaxation. Aperture selection apertures are relatively  brick saw blades simple parameters are mainly required by the device options, but in order to maintain the stability of the blade, 250MM best selection of aperture blades above larger device. At present, the design of standard aperture, 120MM and below, mostly in diameter 20MM Kong ,120-230MM mostly 25.4MM Kong, more than 250 multi-aperture 30, some of the imported equipment has 15.875MM hole, multi-chip saw relatively complex mechanical aperture , mostly with keyway to ensure stability. Regardless of pore size, can be transformed through the sds drill bits  lathe or EDM, lathes car washer can be set in a large aperture, EDM can reaming necessary requirements for the device.
Alloy head type, substrate material, diameter, number of teeth, thickness, tooth, angle, aperture and a series of parameters combined into a whole hard alloy saw blade, to a reasonable choice and match in order to better play to its strengths.

Diamond grinding wheel before the operation must be sure to go through professional training

Diamond grinding wheel before the operation must be sure to go through professional training, the following are often encountered during operation problems, a quick look:
Side grinding problem:
In grinders everyday use, we often  PCD grinding wheel find that some operators, regardless of the type of grinding machine, regardless of the type of wheel, casually on the side of the grinding wheel to use, which is a serious violation of safety rules of the illegal operation behavior. Procedures used by the peripheral surface should not be used to do the side face of the grinding wheel, this wheel radial strength greater axial strength is small, the operator excessive force will cause wheel broken, even wounding, in the actual The use of the process should prohibit such behavior.
Positive operational issues:
In everyday use, many operators sds drill bits  facing the wheel always used to operate because this direction can be put into effect, in fact, this behavior is grinding machine operation should specifically prohibited behavior. Follow the rules, use the grinder grinding the workpiece, the operator should stand on the side of the diamond grinding wheel, front wheel shall not operate to prevent a wheel failure, or the wheel broken wheel flying flying out.
Force operational issues:
In the grinding machine is used, some operations, especially the younger operators, for the sake of grinding speed, excessive ceramic tile saw  force is too large, which is a very unsafe behavior. Any wheel flat body has a certain intensity, doing so may cause the wheel broken, and even flying out, but also a should be prohibited.

Grinding inner circle divided into the following four categories

Grinding inner circle divided into the following four categories: speed electric aerostatic bearing inner circle grinding, grinding inner circle of mechanical transmission, pneumatic and  diamond blades electric grinding inner  circle inner circle grinding.
Aerostatic bearing speed electric grinding inner circle: The aerostatic bearing (supply pressure is 40 ~ 65MPa), grinding system rigidity, both electric grinding characteristics, speed up 180000R/MIN, suitable for grinding a ~ 10MM hole.
Inner circle grinding mechanical transmission: mainly by the spindle, bearings, sleeve body shell, flat supporting pulleys and other components. Then, after replacement of the long axis, is used to grind different bore diameter and length, for comparison, the use of low speed, the speed is generally lower than 2000R/MIN.
Wind-driven inner circle grinding: spindle with a turbine driven by compressed air turbine rotates the spindle Edge 2000 Pads  speed, spindle speed reaches 10000R/MIN. Moreover, small vibration, pressure can be adjusted stepless. And with regulators, filters and other accessories.
Electric grinding inner circle: A three-phase asynchronous motor direct drive, and another by a high-frequency electric motor driven spindle speed of up to 50000 ~ 90000R/MIN. Output power is larger, instantaneous overload, speed characteristics hard, little vibration.

Abrasives are made from natural and synthetic abrasives abrasive composition, commonly used natural abrasives are corundum, emery. Artificial abrasives are ordinary alumina, white aluminum oxide, black silicon carbide, green silicon carbide. The size of the abrasive particles  metal grinding wheel called wheel size. Particles in the work surface of the grinding wheel and cutting due to friction, wear and tear will gradually become dull, the grinding resistance when the particles and the binding agent exceeds the adhesive force between the particles began to fall off, and replaced by a new sharp particles. So wheel with automatic sharpening performance. But the combination of agents should not be too strong adhesive force, such as the solid particles become too blunt still attached to the wheel surface, the wheel will lose the grinding action. Further, since the grinding wheel and the 4 inch circular saw blade  workpiece to be ground with great friction heat, binders easily softened. By grinding metal material end with adhesive binder filled in the gap between the sand where the grinding wheel stopper reality. If you use this plug real wheel continues to work, not only efficiency is quite low, grinding and cutting tools can also be caused by annealing becomes blue. The other hand, if the bond is not firmly bonded particles, then the particle hole saw blades  has not yet become pure grinding between them will also fall off, so that the transmission line sand abrasion fast, easy deformation, need regular trimming. There are three commonly used binders wheel: vitrified (clay binding agent), the rubber binder resin binding agent.

the two kinds of natural diamond

Natural diamond as found in nature is the hardest material. Using it as raw materials to produce diamond grinding wheel, with fast cutting, wear characteristics, the majority of users. But the natural diamond is limited, so synthetic diamond is made. So we often  core drills say that the diamond wheel is divided by the two kinds of natural diamond and synthetic diamond.Using synthetic diamond as the main diamond abrasive wheel made of diamond substantially retains the characteristics of the grinding sharp, high efficiency, to maintain a good precision, the actual production applications, but also has a large-scale use of natural diamond and a large natural resources, faced with fewer and fewer of the situation, so as to enhance the price of such products, in most respects, this diamond wheel than the synthetic diamond has certain advantages, but in some respects, but also to some  abrasive tools extent artificial diamond make up for the shortcomings of such a diamond wheel, the two complement each other.
Diamond grinding wheel sharp, high efficiency and high precision grinding, due to its unique nature has been widely used in various industries.A grinding wheel rotating at high speed process, if flying or chipping will cause casualties, mainly due to quality, but off wheel or wet tile saw  chucking irregularities.
Second, the process of the grinding wheel will produce a lot of powder layer, the operator needs to wear a mask, or prolonged inhalation of this powder layer can cause respiratory disease, lung disease

diamond tools classification and diverse models

Diamond tools classification and model diversity, then we in the use and maintenance What precautions do? Here are the next, for your reference.
One can not be a single point diamond dressing tool head vertically aligned wheel center, which normally takes tilted 10-15 °.
2, diamond tools in place to clamp head, be careful not to bump into the wheel surface.
3, heat dressing tools can not be "hardened" in the dry dressing must be kept trimmed twice the interval sufficient to heat the dressing tool cooling.
4, can not assume wheel surface with  cutting wheels an ideal flat. When trimming the beginning to find the highest point of the wheel position for trimming.
5, if possible, in addition to the amount of each wheel of the repair, the radius of the wheel can not exceed 0.001 inches. In addition to the amount of the repair is too large diamond dressing tool head can cause premature wear and often broken. diamond wheel some of the issues 1 cutting wheel installed at check carefully before you confirm whether cutting wheel deformation, cracks, chipping and so on.
2 Use the wheel cutter, you must  4 inch circular saw blade follow the wheel size specifications and performance options to use wheel cutter specifications.
3 First use the alignment angle, note the distance ≤ 0.5mm, Xu Xiangqian forward, both contacts must never force to avoid damage.
4 If you are using does not match the workpiece to be cut with a cutting wheel, prone to abnormal wear, sharp bad, abnormal fever.
5 cutting process if abnormal, should  hole saw blades be shut down immediately.
6 When the cutting is not sharp, to be trimmed on the blade wheel. If you continue to use overheat, overload leaving the wheel breakage.
7 wheel rotation, is strictly prohibited hand-operated cutting, not by hand, and physical contact wheel.
8 cutting wheel is strictly prohibited except for grooving or cutting operations, to avoid uneven force abnormal
9 natural diamond extremely hard, wear-resistant non-edge, not collision, so as to avoid undue loss.

Some of the advantages of diamond tools

Diamond tools are widely used in the manufacturing industry, then how about diamond tools trends? Following is a brief introduction, I hope for your help:
A, variety, product  concrete ring saw series: Domestic Diamond Products showing species diversity, product refinement, the application of the trend of specialization. General scale enterprises have dozens of product specifications, a slight scale enterprises have hundreds of product specifications, larger enterprises with thousands of product specifications and the products can be customized according to user requirements.
2, the product according to user requirements are divided into two classes: the use of diamond tools, habits and cost factors, have been artificially divided into two distinct series: First, a larger amount of relatively low price DIY products, such products have a concrete vibrator  greater market; two major international markets for high-end professional products. As in recent years, China's rapid diamond production and quality improvement to be diamond products production technology continues to improve, China's high-end products, diamond tools manufacturing level has made significant progress, and the price advantage is obvious, professional products in the international market competitiveness has enhanced.
3 In recent years, various formulations of pre-alloy powder, adding rare earth metal carcass powder material applications and single (multi) brazing technology, diamond in the carcass ordered, innovation and other new matrix structure

Bronze bond diamond wheel

Bronze diamond wheels with high-temperature sintering manufacturing, the combination of high strength , good formability , high temperature , thermal conductivity and good wear dry cut blades  resistance , extremely long life , can withstand greater loads.
Widely used in glass, ceramics , ferrite , semiconductor materials, stone and other hard and brittle material and a metal material of the grinding process .
The characteristic features of the grinding wheel abrasive particle size , binder, hardness, structure , and other factors determined shape and size . In superhard grinding wheel hardness and organizations are generally neglects to mention .
Abrasive grinding wheel is the main raw material manufacturing , cutting directly responsible work . . Diamond : common materials suitable for processing high wheel hard to process hard brittle concrete diamond blades  metal and nonmetal materials . Such as cemented carbide , optical glass , ceramics , stone , and other semiconductor materials .
Particle size refers to the size of the abrasive particles , the size of a particle numerals. GB provides two kinds of abrasive powder particle size and number. Generally speaking, use coarse abrasive coarse ( size number smaller ) , abrasive grinding to a smaller ( larger particle number ) ; powder used for grinding and other precision machining and ultra- precision machining. Ceramic diamond wheel size range generally w1.5 ~ 80/100
The role of binding agent binding agent is bonded abrasive having a given strength and shape of the wheel. Wheel strength, impact resistance , heat resistance and corrosion resistance , depending on the binding agent performance . The binding agents are used  tct circular saw blade vitrified (V), the resin binding agent (B), the rubber binding agent (R) and the metal binding agent (M) and so on . Vitrified bond : the most widely applicable to cylindrical, round, flat , centerless grinding and profile grinding wheel , etc. ; resin bond : for cutting and slotted sheet wheel and high-speed grinding wheel ; rubber combined agent: guide wheel for centerless grinding , polishing wheel ; metal bond : for diamond grinding wheel .

CBN (cubic boron nitride ) grinding purposes

CBN abrasive wheel produced , depending on the process and the different components of the binding agent used can be divided into the following four . Their nature and purpose ( refer to the  concrete saw blades mechanical processing ) are different.
( 1 ) electroplated CBN grinding wheel molding process is simple, low cost of production . Simple but only one layer forming coating, can not be corrected , in the process , is difficult to know when the grinding layer is damaged. For small quantities of complex machining and geometry processing and molding grinding wheel used as a dressing .
( 2 ) CBN sintered density and high hardness, grinding , dressing roller precision machined , high cost. Mainly used in grinding wheel dressing roller and large quantities of superhard materials processing.
( 3 ) Resin CBN grinding wheel manufacturing process is simple, low cost of production . Plastic molding simple but  Diamond tool good correction . For multi- shape small batch processing . Such as tools and tool grinding processing, and glass processing .
( 4 ) vitrified CBN grinding wheel vitrified bond CBN grinding wheel has a strong , high-speed machining workpiece does not burn , and may be amended and durability, etc. , is the best high-speed , high efficiency and high precision grinding tool.
Cubic boron nitride (CBN) grinding wheels suitable diamond discs  for processing a variety of materials the following products: ① high manganese steel ; ② high chromium, nickel, molybdenum alloy steel ; ③ chilled cast iron (HS80 ~ 90); ④ kinds of hardened steel ( HRC55 ~ 65); ⑤ various cast iron (HB200 ~ 400) , etc., and has been in the domestic automobile ( gears , flywheels, shafts, bearings and other processing ) , roll , slurry pump ( impeller, volute , guard, jacket, etc. processing ) , mold , cylinder ; ⑥ glass , gems high hardness soft and tough material , all walks of life to solve the high hardness cutting difficult materials , and to improve work efficiency, greatly saving processing time and power , access to huge economic benefits.

Diamond tools for processing stone products, the impact of the main reasons

Stone processing mainly sawing, cutting , grinding, polishing . Means workability stone sawing, cutting , grinding, polishing and ease of processing .
Sawing, cutting the same , grinding, polishing , although different, but very similar. So the general workability dry core drill bits  usually refers to the stone can be cut and grindability . Affect the stone processing are the main factors :
( A ) Hardness
Generally , the greater the hardness of the stone , the more difficult the process , the greater the wear of the tool .
( 2 ) Mineral and chemical composition
The material components stone material components include mineral composition and chemical composition , different minerals and chemical composition , processing is different. Such as marble rock-forming minerals are calcite , dolomite , and its Mohs hardness is 3 and 3.5-4 , respectively , compared with granite low hardness, ease of processing . Granite is glass blades  the main rock-forming minerals quartz, orthoclase , plagioclase , and their Mohs hardness of 6.5-7 . Its workability depends largely on the content of quartz and feldspar , the higher the content , the granite blades  more difficult process . In the chemical composition , such as the higher SiO2 content , processing more difficult .
( 3 ) the structure of the rock structure
In general , uniform particles than the uneven stone easy processing , high quality polishing ratio tabular fine , dense stone gloss than the loose stone . Mineral good crystallinity and orientation , the optical axis direction will greatly enhance the gloss after polishing . Rock cleavage, grain boundary and initial crack on the workability is also very important factors.

Widely used for diamond tools

1 . The correct selection of varieties and grades blade blades of different varieties , because of its different components , cutting a big difference , and selection need to be careful. Currently carbide blade did not have a unified international classification , each has its own production plant varieties and grades should be used with reference to the manufacturers product samples to choose. Particle size can be divided  diamond saw blade  into three categories: the coarse grain ( average grain size of 20 ~ 50μm), the grains (10 ~ 20μm) and fine grain (2 ~ 10μm). The larger the grain size , the better the abrasion resistance , tool life , the higher the edge of poor quality, precision tool is made difficult . Instead, fine-grained tool cutting edge edge quality is good, good surface quality . Thus , the current grain polycrystalline continue to refine and already 1μm, 0.5μm or less even fine grain , to be based roughing and finishing processes , such as different requirements , use of different grain sizes . But our studies indicated that , in poly- crystal micro- cutting tool , it has a " multi-point cutting , forming  diamomd core drill bits a single point " feature, so long as the process to take certain measures , with coarse grains (70 ~ 30μm) polycrystalline tool also precision machining surplus can cut surfaces.
(2) select the appropriate cutting in recent years , with the occasion of the new materials, new technologies, new processes, new equipment innovations continue to emerge , such as superfine pre- alloy powder , laser processing , vacuum brazing technology , diamond plating technology, diamond uniform technology and other cutting-edge new technology, being highly Edge 2000 Pads  concerned with the key R & D , R & D results also gradually industrialized. As these research achievements in industry , diamond tool performance on continuous improvement , functionality continues to expand, currently has gradually extended its scope of application to the semiconductor , aerospace, information and many other fields, for diamond tools manufacturing enterprises to provide high profits and huge development space

types of grinding inner circle

Grinding inner circle divided into the following four categories: speed electric aerostatic bearing inner circle grinding, grinding inner circle of mechanical transmission, pneumatic and electric grinding inner cutoff wheel  circle inner circle grinding.
Aerostatic bearing speed electric grinding inner circle: The aerostatic bearing (supply pressure is 40 ~ 65MPa), grinding system rigidity, both electric grinding characteristics, speed up 180000R/MIN, suitable for grinding a ~ 10MM hole.
Inner circle grinding mechanical transmission: mainly by the spindle, bearings, sleeve body shell, flat supporting pulleys and other components. Then, after replacement of the long axis, is used wet diamond polishing pads  to grind different bore diameter and length, for comparison, the use of low speed, the speed is generally lower than 2000R/MIN.Wind-driven inner circle grinding: spindle with a turbine driven by compressed air turbine rotates the spindle speed, spindle speed reaches 10000R/MIN. Moreover, small vibration, pressure can be adjusted stepless. And with regulators, filters and other accessories.Electric grinding inner circle: A three-phase floor polisher pads  asynchronous motor direct drive, and another by a high-frequency electric motor driven spindle speed of up to 50000 ~ 90000R/MIN. Output power is larger, instantaneous overload, speed characteristics hard, little vibration.

electroplated diamond

 The main difference is the type of binding agent: resin bonded diamond grinding wheel mainly phenolic resin and a small amount of metal powder as a binder, and electroplated diamond grinding wheel is a crack chaser  method by electrodeposition of nickel-cobalt alloy is deposited on the metal substrate surface and fixed to a diamond abrasive wheel production process.Their performance on the main difference is:1, in the processing efficiency, due to the use of higher grade plating abrasive grinding wheel and only one layer of abrasive, thermal performance and so have their own advantages, so the more efficient processing of electroplated diamond grinding wheel;
2, service life, only one layer  concrete core bits of abrasive grinding wheel plating, the plating wheel life will be inferior resin diamond grinding wheel;
3, machining accuracy, surface roughness of the workpiece the impact, the same case size, plating out of the surface roughness of the grinding wheel to be worse.Second, at the same time, but also because it has a fast heat dissipation characteristics, so in grinding large number of heat-sensitive materials, thin-walled workpieces and dry milling process (eg rail grinding carbide cutting tools and machine tools, etc.) with good results.

Diamond saw blades range of applications

(A) the processing of non-ferrous materials difficult to machine
Processing of copper, zinc, aluminum and other nonferrous metals and

alloys, the material easy to adhere to the tool, processing

difficulties. Using diamond low coefficient of friction, and non-ferrous

metal affinity characteristics of  concrete ring saw small, diamond tool and the tool can

effectively prevent the occurrence of metal bonding. Further, the

elastic modulus of the diamond cutting edge portion is deformed when

small, the cutting non-ferrous metal extrusion deformation is small, the

cutting process can complete the small deformation, which can improve

the surface quality.
(2) the processing of non-metallic materials difficult to machine
Processing particle contains a lot of high hardness non-metallic

materials difficult to machine, such as glass fiber reinforced plastic,

filled silicone material, hard carbon fiber / epoxy composites, the

material of the hard particles so that diamond bandsaw blades  the tool wear serious, hard

carbide cutting tools processing, and diamond tools, high hardness, wear

resistance, and therefore processing efficiency.
(3) ultra-precision machining
With the advent of modern integrated technology, precision machining

direction to the development of the tool performance made some very high

demand. Because diamond friction coefficient, low coefficient of thermal

expansion, high thermal conductivity, can diamond tool manufacturer  cut very thin chips, chip

easily outflow affinity with other substances is small, easy to BUE,

heat a small, high thermal conductivity, heat can be avoided of a blade

and the workpiece, so the passivation edge, cutting deformation, the

surface of higher quality can be obtained.

Factors size diamond saw blade

The grit size used in the 30/35 ~ 60/80 range. The more hard rock,

should be selected with a finer granularity. Because at the same

pressure conditions, the more detailed the more sharp diamond, cut hard

rock in favor. In addition, the general requirements of a large-diameter

blade cutting efficiency is high, with the  coarser particle size should

be selected, for example, 30/40, 40/50; small-diameter blade cutting

efficiency is low, requires smooth  green concrete blades rock cutting section, preferably to a

smaller particle size, such as 50/60, 60/80.
Segment concentration
The so-called diamond concentration, the diamond in the working layer is

the carcass in the density distribution (i.e. contained within the unit

area weight of the diamond). "Norms" provides work per cubic centimeter

of the matrix containing 4.4 kt diamond, the concentration of 100%,

including 3.3 kt diamond, the concentration was 75%. Volume

concentration of said agglomerates in the volume occupied by the number

of diamond and provides that when the volume of the total volume of the

diamond 1/4 concentration of 100%. Increasing the concentration of

diamond is expected to extend the life of the blade, because of the

increased concentration of each piece of diamond is reduced, the average

cutting force suffered. However, increasing concentrations will increase

the cost of the blade, so there is concrete core bits  a concentration of the most

economical, and the concentration increases with the cutting rate.
Blade hardness
Generally, the higher the hardness binding agents, the stronger its wear

resistance. Thus, when a large rock abrasive cutting, the bonding agent

should be high hardness; when the cutting of soft rock material, the

hardness of the binding agent should be low; when large and abrasive

cutting hard rock, the binding agent should be moderate hardness .
Effect
Diamond saw blades in the process of cutting stone, will be centrifugal

force, cutting power, cutting hot alternating load effect.
Because force and temperature effects caused by diamond saw blade

grinding breakage.
Force effects: In the cutting process, the blade subject to axial force

and tangential force. Because there is  wood band saw blades in the circumferential direction

and the radial force, in the axial direction so that the blade wavy dish

in radial direction. Both can cause deformation of the rock section is

not flat, stone wasted, sawing noise, vibration intensified, resulting

in diamond caking early damage, reduced blade life. +++

A carbide circular saw blades and alloy head has a sharp edge-sensitive

so the movement of the blade, installation and removal process, you must be careful to protect alloy head from injury.
2 Regularly check the machine spindle runout (± 0.02mm), and swing (± 0.01mm).
3 blade must be removed before installation flange on the spindle and debris. Flange surface should be smooth, clean and axes are mutually perpendicular.
4 Use the largest possible blade flange makes  turbo blades more stable operation, flange size should be consistent with the size of the blade flange diameter of 1/3 (thin blade flange should adopt 1/2D ) Sawing better (especially thin blade).
5 blade should be installed after a smooth idle 30 seconds, if everything is OK before you start cutting work.
6 blade flange nut during installation must be elastic medium, too loose in the rotating cutting blade will slip, too tight or deformed saw blades have internal injuries affecting cutting performance.
7 before cutting blade operator must take a good protective equipment (safety glasses, dust masks, helmets, protective gloves) and check the saw guard is intact.
8 of the following circumstances, the need for timely grinding.
a) no longer meets the requirements sawing quality.
b) When the machine energy consumption significantly increases.
c) the cutting edge of a clear material, when population explosion.
d) achieve the 0.2mm alloy edge wear.
Grinding time is very important, because it  wet saw blades is not a sharp blade at work, saw the body may have a fever, also causing the motor load is too large, reduce the life of the blade. Shall be grinding at the time to continue cutting, cutting every 10% increase in volume, will bring an additional 50% of the alloy damage and shorten the life of saw blade.
9 must be cleared regularly serrated and saw gathered at the side of the resin plate, debris and other debris, because the adhesive material constantly accumulated, the resistance will increase, resulting in high energy consumption (in extreme cases, can cause the machine motor burned) and rough cutting quality. If both cutting edge is blunt, it may cause damage to teeth.
10 Avoid using aggressive cleaning solvents, long blade when not in use, should be cleaned sharpening, buy oil for rust treatment, and  table saw blades in its original carton and then properly placed inside.
11 using sophisticated, stable, vibration-sharpening machines, and suitable diamond wheel. Accordance with the prescribed procedures to repair the running head of gold, will extend the life of the blade, do not use hand-operated grinding equipment.
Sharpening the attention in strict accordance with specifications Plains BLOG sample geometry designed to grinding.

to prevent the circular blade hardness is low and how to make the circular blade wear durability

Let's say the first choice, how to make circular blade hardness to achieve the best state, is a circular blade hardness and toughness to achieve the perfect value!
(A) heat treatment process in strict accordance with operating procedures, frequently check the gun temperature heat treatment equipment and instruments, such as the working status.
(2) In the quenching apparatus, the cooling medium is loaded in the circulation or agitation, to improve the cooling capacity of the quenching medium and uniformity.
 (3) on carbon tool steel and alloy tool steel circular blade, always check its hardness after quenching. Pair of high-speed steel circular blade, always check its quenched microstructure.
(4) Set monitor temperature control to prevent tempering temperature (temperature tempering run).
(5) to ensure the circular blade (including the blade) performance under the premise, according to the circular blade structure and size selection with the proper hardenability of steel.
(6) strict control of the chemical composition of  drill bits the steel and the original organization, plus 9 Steel management to prevent steel mixing.
(7) strictly in accordance with specifications for grinding circular blade grinding
  Two: how to use the circular blade will wear durability
    1, the selection of materials.
Choice of materials is an important step, the selected material is aligned with the customer cut and abrasion resistance of materials use the appropriate materials, materials selected is not good, a direct impact on the use of blade life.
2, the casting process
Air hammer steel casting eliminate occurred during a workout loose and vague and other shortcomings, the usefulness of ceramic tile saw  forging raw data is to make more solid circular blade.
3, the heat treatment process
Heat treatment process is a very important quality in production order, the customer and swap chipping mentioned port is the primary reason that the heat treatment. Effect of heat treatment of the circular blade material promoted higher hardness.
4, the machine processing steps
Based on customer requirements, we use cutting discs  sophisticated tools to right circular blade material thickness, parallelism, flatness, cylindrical, inner circle such as to make the product. Thickness Gongyi guarantee within the ± 0.0005mm. View product of all precision in temperature indoors.

Diamond saw blades for cutting metal can cause

1 , diamond saw blade is characterized by soft afraid of hard afraid
2, the metal part of the plastic material , is for marble, glass , the metal to be "soft" is much more
3 , marble, glass is brittle concrete saw blades  material , harder than the metal
4 , diamond is a valuable material , although the diamond saw blade diamond is a man , but it is expensive , it is made ​​by a method using powder metallurgy , that is, the diamond particles in the metal powder mixed sintering rather backward over the blade , the blade is to wrap diamond grinding wheel for metal rubbed off , exposing the diamond particles less than half the pieces , this is the diamond particles exposed head was cut marble "blade"
5 , diamond saw blade "cut" marble , it granite blade   is actually a diamond will powdered marble , marble which will "cut" open to the
6, if using a diamond saw blade to "cut" metal , "soft" diamond particles of the metal will be "glued down " so that the diamond blade failure . Remember: Do not use diamond saw to cut metal !
7 , with ordinary thin grinding wheel cutting metal is possible, although this wheel is a metal ground into powder, but not as good as diamond grit is precious , and that sand is bonded with a special adhesive overall shape , that is, said that the whole can be " cut" of the sand grains , cylindrical sanding off the back of the sand can continue to "cut"

Diamond tool materials species classification

Synthetic polycrystalline diamond (PCD) and synthetic polycrystalline diamond and carbide composite blade (PCD / CC)
PCD is at high temperature ( about 1800 ℃), pressure (5 ~ 6MPa) , the use of cobalt and other metal binding agent to a  oncrete crack chaser number of polycrystalline diamond crystal powder polycrystalline material , although slightly lower than the hardness of a single crystal diamond , but it is randomly oriented diamond grains polymerization , is isotropic , as can be arbitrarily oriented cutting tool sharpening , no natural diamond that must be selected as the best cleavage plane as a rake . In cutting, the cutting edge is very sensitive for accidental damage , wear resistance is also strong , long stay sharp cutting edge , can be used when machining high cutting speed and larger cutting depth ( to eat deep ) , life concrete core bits  is generally higher than the WC-based cemented carbide cutting tools 10 to 500 times , and because the metal binding agent PCD has conductivity , making PCD easy to cut to shape , and is a rich source of raw materials , the price is only a few tenth of natural diamond a fraction of the ten have become traditions WC-based cemented carbide cutting tools , high-performance alternatives.
PCD inserts to improve the toughness and weldability in the cemented carbide substrate , sintered or pressed on the surface of 0.5 ~ 1mm thick layer of the composition of PCD diamond composite blade (PCD / CC). PCD / CC welding or machine folder available way of making knives. Due to its good weldability , regrinding easy , low cost, and polishing pads for granite  therefore widely used. Hereupon , PCD and PCD / CC sharp cutting edge of the tool and are not as good surface quality single crystal diamond , while its workability is poor, the grinding ratio is small , it is difficult according to the geometry of any shape head , still not easy to manufacture with chipbreakers indexable end mills and other geometric shapes and complex products.
CVD diamond
CVD diamond is a diamond material of high wear resistance of pure , non- binding agent , which is at low pressure (<0.1MPa) prepared under . CVD diamond films are coated CVD (CD) and CVD thick (TFD) forms.
CD is a CVD ( chemical vapor deposition ) process , the carbide substrate ( K type alloy used ) is deposited to a thickness of about 10 ~ 30μm, composed of a polycrystalline diamond film is made .

diamond saw blade speed by equipment conditions

(1) diamond blade speed: in practical work, diamond saw blade speed by equipment conditions, saw the quality and the nature of the restrictions before sawing stone. From the optimum blade life and cutting efficiency, it should be selected depending on the nature of the stone saw blade speed. Sawing carbide drill bits  granite, the blade speed at 25m ~ 35m / s within the selected range. For high quartz content and difficult cutting granite, remove the blade speed limit is appropriate. In the production of granite tiles, the use of smaller diameter diamond saw blade, wire speed can reach 35m / s.
(2) Cutting Depth: diamond cutting depth is related to wear, effective cutting, saw cutting force conditions and the 12 inch saw blade  nature of the important parameters of stone. Generally speaking, when the line speed diamond saw blade is high, should be selected for cutting of small depth, from the current technology, the cutting depth of the diamond can choose between 1mm ~ 10mm. Usually with a large diameter saw blade cutting granite blocks, the cutting depth can be controlled within 1mm ~ 2mm between the feed rate should be reduced at the same time. When the line speed diamond saw blade is large, a large cutting depth should be selected. But in performance and tool strength saw the extent permitted, should try to take a greater depth of cut for cutting to improve cutting efficiency. When the machined surface colde saw blade  when requested, should be used small depth of cut. (3) diamond saw blade feed rate: Feed speed incurs sawing stone feed rate. Its size sawing rate impact, the force and the cutting blade heat dissipation area. Its value should be based on the nature of the selected cutting stone. Generally speaking, sawing softer stone, such as marble, may be appropriate to increase the feed speed, if the feed rate is too low, more conducive to high cutting rates. Sawing fine structure, relatively homogeneous granite, may be appropriate to increase the feed speed, feed rate is too low if the diamond blade easily be polished. But sawing UNEVEN coarse granite structure, should reduce feed speed, otherwise it will cause the blade vibration and reduce fragmentation leading diamond cutting rates. Granite cutting feed rate is generally 9m ~ 12m/min within the selected range.

Diamond saw blade consists of two parts; the base body and head

 Diamond saw blade is a cutting tool, widely used in stone, ceramics and other brittle materials processing. Diamond saw blade consists of two parts; the base body and head. Head substrate is bonded to the main support part and head is in the course of the part from the cutting, head are  carbide grinding wheels constantly in use and consumed, and the base body is not, the cutting head is able to play the role because it contains diamond, diamond hard as the most material, which cut the tip friction object to be processed while the diamond particles from the metal inclusions inside the tip. In use, the metal matrix with the consumption of diamond, the ideal situation is generally a metal carcass consumed faster than the diamond, so that the sharpness of the blade can ensure head while ensuring a longer life span, the middle part the matrix is ​​generally Mn steel. outer part is the head.
Classification of diamond saw blades
More and more industries in the production  turbo blades process using a diamond saw, with industry consolidation segments, diamond saw blade types are becoming increasingly refined.
I. manufacturing technology Category:
A sintered diamond saw blade: sub cold sintering and hot pressing two kinds, pressed sintering.
2, the welding diamond blade: high-frequency welding and laser welding of two types, high-frequency welding by melting the tip and substrate media are welded together, the laser welding head by high temperature laser beam melts the edge contact with the substrate forming a metallurgical bond .
3, Diamond Saw Blade: the head is attached to the powder by a plating method on the substrate.
Two appearance Category:
A continuous edge blade: Continuous serrated diamond saw blade, usually produced by sintering method, commonly used as a basis for  wet saw blades bronze binder matrix material, cutting water to be added to ensure the cutting effect, and will be useful for laser cutting head gap species.
2, blade-type blade: serrated disconnected, cutting speed, suitable for dry and wet cutting method.
3, turbo saw blade: 1,2 combined with the previous two advantages, sawtooth-shaped uniform continuous presence turbo punch, improved cutting speed and increase service life.

Circular blade how to install

Usually get the machine, many people do not know how to deal with, to share some of the following circular blade shearing machine disassembly and installation processes and the steps that  core drill bits we should pay attention to some of the problems!
The circular blade shears and  how to mix it together? First, we must first remove the front bench clipboard, front support arms, and lower front cover plate. Then we must be very careful, very sharp circular blade shears, when the whole process of operation are used to bring gloves, first turn off the pump motor, loosen the screw when the first machine in the middle of the clipboard loose screws at both ends The left one cup grinding wheels  screw from the fixed effect, and then screw the rear of the clipboard on the blade, this time you can grab the clipboard blades by hand, leaving both ends of the screws removed, remove the rear , slowly remove the circular blade, then you can start the pump, so that the slider in the upper dead point, with wooden table and on the mat in between the blades, turn off the  concrete ring saw pump motor, loosen and remove all installed on the blade screws and gently remove the circular blade.
The second step, shearing blades on the installation, first with the blade, with the specifications for the M12 * 40 screws on the blade, not on the ends of the first blade. Then be sure to use the stick against the upper blade, the blade and the contact surface of the slider can be fully tightened after snapping has been installed on the M12 * 40 bolts, when the slider down to the bottom dead point, to turn off pump motor, and then loaded on the blade screws tightened, the blade screw tightening torque should be 35N / M.
Finally, under the circular blade shears installation process, oil pump, when the slider up to the upper dead point, turn off the pump, replace the next round blade, using M12 * 45 hex screws, then pressed with a wooden stick under the blade, so that the next stage of the work under the blade and the blade snapping joints fully tighten screw. In this way, the circular blade clipboard installation process is complete.

Diamond grinding wheel wear and tear

Some devices are also equipped with spindle speed , wheel auto repair, tool nose radius microscope and automatic processing devices. Grinding wheel surface is essentially randomly distributed on a large number of abrasive grains in the process of cutting . Because diamond, cubic boron nitride and other superhard materials with high hardness and  abrasive grinding wheels wear resistance , and its grinding mechanism and general grinding of metallic materials have varied considerably . System superhard materials during grinding diamond wheel loss mechanism for rational selection and use of diamond grinding wheel has guiding significance .
Diamond wheel loss microanalysis :
The various conditions of use after grinding diamond wheel was observed under a microscope , the loss can be analyzed in detail , the results are as follows:
In the grinding force and grinding speed is low under the conditions of diamond grinding wheel , the surface of the angular distribution of a large , consistent reflective facets of diamond abrasive wear . This diamond blade saws  is because the diamond grains and superhard materials produced by mechanical friction and mechanical wear. This wear is gradual, with its grinding abrasive wear amount proportional to the stroke length .
In the grinding zone temperature higher grinding conditions on the diamond grit diamond wheel and graphite oxidation and loss. According to the properties of diamond , oxidation, depending on the degree of graphitization of the diamond abrasive crystals integrity and the degree of graphitization is also related with the crystal orientation . Good diamond abrasive crystal perfection , oxidation , low degree of graphitization loss .
Diamond grinding wheel diamond grit on the  concrete saw blades surface portion of the occurrence of local fracture and fragmentation , resulting in whole shedding. Cleavage occurs diamond abrasive damage . As the crystal is determined by the crystal structure of the cleavage of chemical bonds factor 7 type, intensity and distribution of the resulting fracture plane , it is often the bond strength along the azimuth plane the final generation . Randomness of the distribution of grain , determine the occurrence of cleavage destruction is inevitable.

Description of the advantages of diamond grinding wheel

 Diamond is the world have the hardest known material material , compared with the other abrasives , microhardness , respectively , boron carbide, silicon carbide and corundum double, triple and quadruple , so its grinding performance than several other abrasives is much higher. And its thermal conductivity is relatively high, sharp blade grinding , grinding ability, less diamond blade saws  congestion , better machined surface roughness , scratches and grinding burn and so small, but its deficiencies are prone to iron group elements react . Diamond grinding wheels and the products are mainly used in the manufacture of iron group metals
In order to place a variety of difficult circular blades to machine materials, such as stone, glass , cement products , refractories , ceramics, wood and carbide , silicon alloys and non-ferrous metal brittle ( casting ) and so on. Several physical properties of the abrasive :
As can be seen , compared with ordinary abrasives , diamond grinding wheel has the following excellent properties :
1 ) abrasive strength , high hardness , abrasive durability .
 2 ) high thermal conductivity, low grinding temperature .
3 ) thermal expansion drum wheels coefficient is small, long service life.
As shown by the excellent diamond can win , it is widely used in cutting , grinding, grinding its industry and sawing, drilling and other tools industries. Diamond products including diamond tools and diamond abrasive.
Diamond wheels are widely used in cemented carbide, cermet , cast iron , ceramics , stones, stone, ferrite, concrete, refractory materials, fiber reinforced plastics and many other materials, grinding, its scope and the amount is increasing . The varieties are wheel, Whetstone , grinding piece , street wear strips.