Sandpaper in subsistence use of all sizes are too hearty

Sandpaper dipped in water or soapy water and water can be polished during operation can reduce the wear scar, creamy ahead of the coating, and thrifty servant material is not difficult. But  the mill should be lower face painting and coating ability to wait underlying paint layer after complete dry mill, otherwise it is easy to paint  stone drill bits white, absorbent substrates without some initiative mill, in order to protect the disc with sandpaper quality of work, before grinding to polishing tools should be tested.
 Sandpaper in subsistence use of all sizes are too hearty, whether it is plastic industry, metal industry, construction industry or the automotive industry are operating very widespread. Request for the operation of various industries in each sandpaper does not vary, some  characteristics comply with grinding tools, and some sandpaper to comply with  tile cutting blades the shape, material characteristics, such as differences optional sandpaper. It is also a sandpaper disc sand in one species, but the sand is due to the preparation of the disc appearance and operation of divergent samples, so just give it name from scratch, with the addition of a sandpaper is also referred to.
 Sand may be divided into two types of discs, and the non-porous perforated disc sandpaper sandpaper disc, a perforated disc sand to facilitate the discharge of waste in the grinding object debris carbide drill bits  from the hole, advance grinding efficiency. If the disc sand sticking to the speed change master disc, the special operating machinery or hand, using sandpaper polished, mostly for hard and brittle paint kind of grinding, end compared with convenient operation, but disc sand in operation The process will produce a lot of dust, affecting the health scene, which is dominated disc sand to prevent a fragmentation weaknesses problems.

How to reduce the wear powder method for diamond blade

Since diamond ever discovered is the hardest material in nature, so the wear powder it is tiny. However, it is different from the carcass. It consists of a variety of metal materials, lower carbide tipped saw blade  hardness than diamond, hard granite powder particles susceptible to wear and tear, carcass premature wear will result from the package of diamond premature shedding, so a vicious cycle, a direct impact the life of the blade. Powder in order to reduce the wear on the diamond blade, can be wet saw blades  used the following methods:
The method of purification powder
1, the natural sedimentation method
2 CLEAR Act
3 flocculation
Practice has proved that the diamond blade wear powder is a problem can not be ignored, it reduces the life of the blade, improving costs. Meanwhile, in the recycling process, the device also generates some wear effect, so the time the coolant purification powder particles is necessary.
The method of purifying the three  concrete cutting blade stone powder, the natural sedimentation method is suitable for removing larger particles powder; mechanical removal and chemical precipitation method is suitable for removing small particles of powder. Obviously, if the conditions of the three integrated use, the effect will be better.

Point diamond tool

We know that the single crystal diamond is very hard, very difficult process , a single crystal diamond tool in the design of the time to simplify as much as possible to its shape . In addition to General purpose blade  this characteristic of single crystal diamond , there are many other features , this is not introduced .
Single-crystal diamond tool designed to consider when main factors: ① precision parts to be processed ; ② actual processing conditions ; ③ diamond material properties.
Design single crystal diamond tool , you should follow the following principles: ① Because single-crystal diamond high hardness, processing difficulties, so the shape of the tool should be as simple as possible ; ② According to single-crystal diamond brittle, poor impact resistance characteristics , should be combined with the actual processing conditions , through the tool geometry are optimized to improve the impact resistance head ; ③ precision machined parts according to the requirements of the design wiper length , taking into account the ability of the tool to cut thin .
Below are several commonly used tool , for example, discusses the design of single-crystal diamond tool .
Turning your computer's hard substrate
Computer hard disk substrate is used for information storage, the material is aluminum or aluminum alloy , the surface diamond tool manufacturer  roughness of the substrate , the lower storage density, thus reducing the surface roughness of the processing is critical . The same time as the substrate thickness is less than 0.9mm, in order to prevent deformation , should minimize the cutting forces and extrusion processing .
Cutting hard substrate with good rigidity and stability using ultra-precision lathe disk . Cutting depth of about 0.01 ~ 0.02mm, the feed is about 0.5mm. Rigid disk substrate of single crystal diamond tools shown in Figure 1 the shape of the tip . Head has two main cutting edges , the processing can influence the infeed . Longer wiper ensures two directions machining wiper flank wear will not interfere with each other . Two master in the feed direction of the rake face downtilt 5 °, to obtain about 2.5 ° negative rake angle , the chips flow surface to be processed , in order to avoid scratching the 9 inch saw blade  chip surface has been processed . Very sharp diamond tools , edge radius is smaller than 100nm, 5 ° after the angle of the flank face has been sufficiently reduced to the machined surface of the extrusion and friction.
The key quality requirements of the tool blade and the tip is observed under the microscope at 500 times the defect . The design principle is equally applicable to other ultra-precision mirror surface processing tool .

Diamond cutting wheel grinding characteristics

Diamond thin cutting wheel is mainly used for fine groove and cut close , generally deep creep feed grinding method . With grinding depth, feed rate is small, the grinding wheel and the workpiece contact area, narrow kerf , metal removal rate, grinding , high precision, good surface quality and material utilization characteristics. The polishing pads for granite  general rule is as follows:
1 ) Overall wheel cut thin ( more below 0.5mm ) , small diameter (20-100mm), fine particle size , size and shape and position precision , light weight , generally used in the high- speed conditions . Average speed of 5000-40000 rpm.
2 ) . Matrix-type cutting wheel mostly thick (0.5-2mm), diameter (100-200mm), coarse granularity , the accuracy is low, generally used for lower -speed large depth of cut conditions. Average speed of 3000-10000 rpm. 3 ) ultra-thin cutting wheel to use more fine-grained , and generally thinner grit size of its correspondingly thinner, good surface quality . However, the finer abrasive particle size decreased sharp cutting corresponding to correspondingly reduce the feed rate to accommodate the grit size machinability . 4 ) ultra-thin cutting wheel cutting depth is generally cut parts by the user according to fixed , the cutting mostly used creep feed grinding process , the depth of a cut to the . Such as thin cutting wheel , cutting conditions are poor ( mostly three face contact with the workpiece ) , making it difficult to heat , so to increase ( flow, pressure ) cooling the cutting area .
 5 ) When the cutting wheel at the customer has just appeared on the machine does not move or cut the workpiece chipping , the proposal to increase the cutting speed or decrease feed rate ; when cut after Plate Compactor  a period of time does not move or chipping , it is recommended to use Whetstone appropriate granularity on the surface of the blade wheel to adjust its sharpness .
 6 ) . Workpiece surface quality and cutting performance mainly with thin cutting wheel for abrasive particle size , particle size finer surface finish processing the better . Simultaneously with the workpiece material , hardness, cutting the amount of machining conditions , processing requirements and other factors are also related.
7 ) Ultra-thin cutting wheel factory has been carried out before the general shaping and the blade , users can directly use . If you need further surgery, recommended green silicon carbide or corundum stone, cutting wheel size selected coarse granularity than 1-2 numbers ; if you  sds hammer drill bits need further used for a period after the blade or the blade , it is recommended to use green silicon carbide or corundum Whetstone, cutting wheel size selected fine granularity than 1-2 number or the same number can be.
8 ) general but also with cutting material to be processed , hardness, precision machining requirements related to the proposed initial use of the best in the user's original conditions, do not easily change cutting .
9 ) to the user condition is also a major factor affecting the cutting performance , especially in the spindle axis moving string , runout , the flange parallel, have directly affected balancing precision cutting wheel cutting precision .

Broaden the application areas of diamond

China's hardware tools are widely used in geological exploration, stone, machinery, automobile and defense industries and other fields, with the abrasive machining, geology drill and  core drill bits stone cutting tools has greatly improved the level of the manufacturing process, products have been formed standardization, different specifications, product quality and stability, some products in the international market have a certain competitiveness. All kinds of diamond tools also been widely used in various industries, and achieved significant economic benefits, but on the whole diamond tools industry, still need to improve the industrial planning, broaden application areas, creating an international brand.
1 Industry Planning: strengthen macro-control management
Because the blind development, production and distribution of diamond tools appear scattered and chaotic situation everywhere, generally small-scale producers, production is not centralized, process technology, the lack of market competitiveness, tool sales market, product quality is unstable, disorderly competition, price chaos, economic efficiency is not high.
(2) Product Development: Widening the application areas of diamond
The current domestic production tools as well as new product development, technology research and other aspects of insufficient capital investment, to increase tool industry investment, pay close attention to new product development and new technologies, promotion of new technology and continue to broaden the field of application of diamond to enhance diamond tools industry overall technological level and market competitiveness, variety, quality of survival, to scientific and technological progress and development.
Tools to meet the needs of the market at home and abroad, we must accelerate the development of new products, improve product quality, increase product variety and improve production. In recent General purpose blade  years, machinery, gems, medical equipment, wood, glass, steel, stone handicrafts, ceramics and composites processing of non-metallic brittle materials the field of diamond tools demand increases every year, at present, these products are domestic or imported, must as soon as possible developed a variety of high-quality range of tools to replace imports.
Currently urgent need to develop products: oil drilling PDC bits, stone polishing with a diamond pen, core bits, diamond honing stone, diamond tools, diamond wheel, rubber plastic-bonded diamond tools, PCD diamond tools, diamond needle, spray Tsui, diamond heat sink and transistors and other products. To ensure the quality of their products, we must accelerate new technologies, promotion of new technology, such as vacuum welding technology, spark sintering technology, uniform technology of diamond, diamond-plated iridium technology and metal bonding technology, laser welding technology.
3 development of the industry: joint build international brands
Enterprise, innovation is advanced  grinding cup wheels technology, and constantly improve the production process, reduce production costs and improve economic efficiency. Take the group or joint venture on the road, the formation of several large enterprise groups, to guide development of the industry, to create their own brand, and actively participate in international competition. Relying on technological progress, increase scientific and technological input, update equipment, pay close attention to new technologies, new processes, new product research and promotion, to improve tool substrate material usage, accelerate the development of China's hardware tools industry to further enhance economic efficiency and overall level of technology.

Characteristics and requirements of resin grinding wheel

Our resin grinding wheel should have some preliminary understanding, but it should still be enough to understand the properties of a comprehensive , how in everyday use will maximize the polishing pads for granite  efficiency of resin grinding wheel , let us work together to understand :
First, you know, resin grinding wheel is made ​​of resin grinding wheel, such as phenolic , epoxy, polyurethane , polyvinyl alcohol, resin grinding wheel is a high strength, can strengthen the wheel to add fiber mesh and steel , such as our cutting discs, grinding, now most of us are not waterproof resin grinding wheel abrasive grinding fluid could not be used , of course, need to add some resin grinding wheel grinding fluids , such as epoxy , resin grinding wheel is a good finish, not easy to burn currently tuck point blades  used in the resin grinding wheel cutting disc, double-end , heavy duty wheels, polishing wheels and so on.
There are many special resin binding cutting diamond wheel for rapid cooling . These wheels especially suitable for carbide tools ( such as saws, cutting machines , drilling tools, end mills , etc. ) grinding . In addition, these tools can also be used carbide dies , rollers and carbide wear parts , precision grinding operations. Resin binding wheel and precision machining of ceramic products, ceramic grinding tungsten  core drills carbide and the preferred thermal sprayed layer . CBN grinding wheel can be used with resin glue used in combination for grinding high-speed steel , tool and die steels and superalloys FtRC50 above .

carbide saw blade grinding

Carbide saw blade grinding surface and in accordance with rake angle of the surface after a 1:3 relationship, only when the saw blade through the right to make the tool after grinding to maintain normal working life. Incorrect grinding, if only the front face or only from  granite polishing pads a corner after corner knife surface grinding tool life will be shortened. Another important point is that the whole area should be fully worn grinding. Carbide saw blade sharpening machine is placed on automatic grinding, due to quality reasons, we do not recommend universal grinding machine grinding blade manually, automatic CNC grinding performance guarantee rake surface and the surface of the posterior horn of the repair mill entirely in the tamping rammer  same direction.
Rake surface and the posterior horn of the surface grinding carbide teeth ensure ideal working condition and stable life, serrated remaining length and width should be at least not less than 1 mm (measured starting from tooth Block).
Saws grinding
To prevent large diamond dressing grinding wheel wear, it is necessary to saw the side of the sawtooth sufficient living a side projecting portion. On the other hand, the maximum lateral projection on each side should not exceed 1.0 to 1.2 mm in order to ensure the stability of the  ceramic tile saw sawtooth.
Changes flute
Despite grinding reduces jagged length, but YFENG flute design ensures heat off of the saw blade grinding operation has sufficient chip space, thus avoiding grinding teeth grinding while the flutes to the case .

diamonds and synthetic diamonds difference

Crystal habit
Synthetic diamonds often: cube, octahedron, and both poly shape
Natural diamonds often: octahedron, rhombic dodecahedron, and both poly shape, as well as common triangular flakes twins
Color
Synthetic diamonds often core drills  brown, and is often irradiated to change color into blue, orange, pink, brown and golden yellow
98% of natural diamonds are colorless - yellow series.
Surface and internal texture
Synthetic Diamonds: You can display or cross-shaped dendritic texture
Natural Diamond: The surface dents or Triangle Triangle common, often show the internal structure associated with the texture.
Magnification
Synthetic Diamonds: seed and phantom zone, various forms of metal inclusions
Natural Diamonds: no metal inclusions
Visible absorption spectrum
Synthetic diamond: None 415.5nm absorption lines obtained in liquid nitrogen under low temperature conditions can be measured less than 500nm 658nm absorption and total absorption peak
Natural diamonds: mostly 415.5nm absorption lines
UV fluorescence
Synthetic Diamonds: usually no cbn grinding wheel  fluorescence under long-wave, and shortwave under yellow-green, orange and yellow fluorescent, the "Maltese Cross zoning" phenomenon, while there are obvious phosphorescence
Natural diamonds: mostly under long wave blue and white fluorescent, weak or displaying inert under shortwave.
Cathodoluminescence instrument
Synthetic Diamonds: UV fluorescence distribution with similar characteristics, different growing areas show different fluorescence band
Natural diamonds: mostly irregular
Because natural diamond growth when the environment is changing at all times, however, the growth of synthetic diamond environment is static.
IR
Synthetic Diamonds: 1130 Cape beam absorption band
Natural diamonds: 1176,1282 beam absorption bands.
Conductivity
Synthetic Diamonds: some may have  diamond blade circular saw conductivity or thermal conductivity
Natural Diamond: In addition to Blue Diamond is a semiconductor outside, are not conductive, and is not magnetic.
Other
Such as exception birefringence

Identification of the diamond tool

A diamond single refraction
Diamond single refraction is due to the nature of the diamond characteristics of the decision. While other natural stones or artificial gems are mostly double refraction in nature. Fake  cbn grinding wheel diamond under a 10x magnifying glass from the front, slightly oblique perspective, it is easy to see that angular lines overlapping images, and also showing the two bottom light. Birefringence small differences such as zircon, etc., can also be seen that light at the end of overlapping images.
2, the diamond adsorption
Grease and dirt diamond has a certain affinity, the oil is easily adsorbed diamond. Therefore, the diamond will feel with your fingers stroked tackiness, fingers seem to have slimy feeling. This is not any gems. This approach needs to be trained can only master concrete ring saw  one subtle difference.
3, the characteristic straight line
Diamond polishing the surface is very smooth. With a pen dipped in ink across the diamond, if real diamonds, leaving the surface is a smooth and continuous lines, characterized by straight line. Counterfeit goods leaving behind a small dots lines. This method should be observed with a magnifying glass.
4, the unique adamantine luster
Roughly 100 degrees incandescent light, a good diamond cutting and grinding are compared with counterfeit table saw blades  goods, it is easy to see which has the adamantine luster. This method should not be too dark or too strong in the light is conducted.

stainless steel cutting blade segment dedicated

 Special stainless steel cutting blade Category:
1, the surface chromium nitride alloy plating
(Seven color), this cutting stainless steel and alloy coatings and materials when compared to the general coating abrasion Edge 2000 Pads  resistance, the resistance will be reduced under high-speed operation, in order to prolong the life of the blade and maintain long-term action under the stability. Adding cobalt and the blade, the saw blade can effectively improve the stability, hardness and wear resistance. The blade can reduce the cobalt content increases, the coefficient of friction between the workpiece. Its durability is the ordinary high-speed steel 1 to 2 times. This blade especially for stainless steel tubing, rods, profiles sawing, cutting, cutting, milling. Used in the processing of ordinary steel, aluminum, plastic, wood and other materials, the effect is very obvious, less burr after cutting section, blade toughness, cutting and long life. Machinable stainless steel tube material: 3-Series industrial stainless steel.
2, oxidation coating
: After the steam treatment, the blade, the wood band saw blades  surface oxide layer (Fe3O4), this blade surface smoothness, and help to enhance the self-lubricating ability of the blade, the blade material stuck phenomenon is to a certain extent can be avoided on the cooling ability to absorb better, but compared to other coated blade, cutting the number of relatively less, which is usually the most common one we saw. HSS film - oxide coating technology parameters:
Coating thickness: about 5-10 microns
Surface hardness: about 900HV
Friction coefficient: 0.65
Machinable stainless steel tube material: 3-Series industrial stainless steel.
3, titanium coating
: After special treatment, the blade PVD coating, the surface was gold, the surface hardness of 2400HV, compared to steam treatment saw increased nearly three-fold, Mocha coefficient decreased to 0.55 for the semi-automatic or fully automatic metal circular sawing machine Quick Sawing seamless, iron pipes, rods, etc., faster than the steam treatment saw doubling, effectively reducing the cost cutting while in sawing stainless steel pipe, it can get quite satisfactory cutting results. HSS piece - titanium coating technology parameters:
Coating thickness: about 5 microns
Surface hardness: about 2200-2400HV
Oxidation temperature: 600 ℃
Friction coefficient: 0.55
Machinable stainless steel tube material: 3-Series industrial stainless steel.
4, purplish blue coat
: The use of multi-layer PVD coating treated blade to achieve a very low coefficient of friction, suitable for floor polisher pads  high cutting speeds and high feed rate used under the fine processing, and can significantly reduce litter on the edge adhesion . For cutting hard metal material, a copper alloy cut, cutting titanium, and an adhesive material cutting phenomenon is particularly frequent. High surface hardness of the blade allows for high-speed cutting work with other than uncoated blades, feed can be increased by 100%, increase the service life of the saw blade. This blade makes cutting surface is very smooth, saw more wear, so the cutting speed should be increased by 100%. HSS film - purplish blue coating technology parameters:
Coating thickness: about 5 microns
Surface hardness: about 3000-3300HV
Oxidation temperature: 450 ℃
Friction coefficient: 0.25
Machinable stainless steel tube material: stainless steel 3-series and two series of industrial stainless steel decorative materials.

Some natural granite introduction

A dark acidic igneous rocks, commonly known as granite. Carbon dioxide content of more than 70%. Lighter in color, with gray, red concrete diamond blades  meat are more common. Mainly composed of quartz, feldspar and biotite and other dark mineral composition. Quartz content of 20% -40%, alkali feldspar than plagioclase feldspar total about 2/3 or more. For a variety of alkali feldspar and albite feldspar, plagioclase mainly sodium oligoclase or longer stone. Dark minerals are dominated by biotite, with hornblende. With porphyritic granite structure or structures. By containing mineral species can be divided into biotite granite, muscovite granite, hornblende granite core bits  granite, two-mica granite, etc., constructed according to the structure can be divided into fine-grained granite, medium-grained granite, coarse-grained granite, porphyritic granite, porphyritic Granite, geode granite and gneissic granite; according contain minerals can be divided into cassiterite granite, granite containing niobium, beryllium-containing granite, lithium mica granite, electrical granite. Common length petrochemical, greisenized tourmalinization other self metamorphism. Granite is a rock widely distributed in various geological era has outputs. Morphological mostly batholith, rock plants, rock bell. In Genesis, the view was expressed that the crust is deep granite granitic magma crystallization by condensation or crystallization of basaltic magma Plate Compactor  differentiation is made, it was considered to be the depth of metamorphism and metasomatism caused by the granite of the result. Many non-ferrous minerals such as copper, lead, zinc, tungsten, tin, bismuth, molybdenum, precious metals such as gold, silver and other metals, rare metals such as niobium, tantalum, beryllium, radioactive elements such as uranium, thorium, etc., are related to granite.

Granite Building Materials may be carcinogenic

 carcinogenic killer careful radiationPeople benzene, formaldehyde and other indoor pollution has gradually attention, but also lack of knowledge building radiation contamination. She  drill bits pointed out that the mostMuch hidden from the stone. Due to the earth's crust contain radioactive substances, natural stone, too.
Radioactive stone on the human body, there are two, one is the stone decay of radionuclides emit X-rays of the human bodyCause external irradiation, but the probability is very low; Another is the release of radon exposure on the human body inside. Radon is toShell radioactive uranium, radium and thorium decay products of radon is listed as one of 19 kinds of carcinogenic substances, mainly the production of induced lung cancerAccording to testing, the radioactivity of different colors are different stone. Highest red and green, white, black is the mostLow. Therefore, consumers should choose carefully the red, green, or red blotches with granite varieties. He said that the wet granite pads  graniticExtensive use of stone should not be in the room, especially not in the bedroom, children's room to use.
Using more than 60% the proportion of Guangdong
"The use of granite is indeed very popular in Guangdong." Guangdong Provincial Bureau of Nonferrous Metal Geological Exploration team captain Zhang Xinxiong 931Said Granite is an important building material in Guangdong, and some of the more serious areas of granite radiation. Geological SurveyAlthough the department has long been investigated, but now this problem has not yet attracted people's attention.
It is understood that the  cutting blades level of radioactivity is divided into stone by A, B, C three categories, according to regulations, only the A class can be used in home roomInterior decoration. House renovated to do the best detection
Natural marble, they need to be taken to dilute the pollution ways to reduce pollution. Radon half-life of only 3.2 days at roomRadon concentration in the open doors and windows after 20 to 30 minutes afterthe outdoor levels can be reduced.
Therefore, the easiest way is to enhance ventilation. Just a furnished room is best to be detected. If the test resultsIf failed, you can use lower radiation shield paint or lead-free installation, to prevent the release of radon from building materials. If the radioactive targetToo high, the stone must be replaced immediately.

alloy blade deformation

Question: cut timber skew, of varying lengths, the cutting surface uneven, with flash, blade deformation, broken teeth, broken blade, short life.
Reasons: (many situations because it is not caused by attention to detail).
Material: Sometimes the  masonry saw blades  problem is with the material to be cut, because there are too many materials purchased impurities, so when the blade hit these impurities particles, super-hard blade may break or give great sound, cut out of the surface will be uneven. But with softer HSS saw blade can not break, but the results will be skewed cutting phenomenon, because the blade when in contact with particles shift phenomenon.
Blade: Blade not properly gracefully compressive deformation, serrated blunt out no grinding, yaw rate deviation, number of teeth inappropriate choice of saw blade strength is not correct, choose the wrong blade, blade quality is poor.
Cutting machine: Jig Saw a state filled with incorrect number of revolutions does not correct cutting speed and blade with cutting oil selection cutting machine error may be due to influence each other.
There are customer complaints cutting results skewed to the site via our observations, feeding rack not fixed in the factory personnel transport material, often crooked off accidentally collide. Workpiece feeding rack crooked off after, of course, cut out of the material must be crooked.
Customer complaints are also often broken circular saw blades can not be resolved, we have a mechanical design to the scene found that the book has been pointed out, the longer the cutting material, must have been cut by Taiwan to make the segments are not shaking. However, the flap discs  customer still and chopped material as well, so the blade will have to be cut by shaking timber crashed.
There is also the customer's machine is not in the installed horizontally correction, so the machine was fundamentally crooked.
Using fake machine: Because most of the cost of the machine in the mechanical materials, machine parts cheap that the use of cheap, of course, there is no guarantee of quality. Therefore, there may be insufficient because of mechanical stability undue impact or shaking.
Manual machine (operator): Since the machine is manually operated manually, sometimes the operator under the knife under the knife too hard or too fast, it may cause blade breakage.
Blade must be used otherwise the following considerations may still generate more questions:
Must determine the cut material has a good fixed.
Material to be cut according to the cutting conditions are set.
Filled with saw, must be part of the jig clean out debris, and then pay attention to the direction of rotation, the blade properly fixed.
Cutting and  concrete saws stop cutting at the beginning, do not feed too fast. (May cause broken teeth and damaged) make full use of cutting oil (I hope with the work material selection cutting oil) Disposable circular saw blade circular saw blade cutting machines and cutting machines generally different, we must choose the correct blade.
Can not be mixed, unless the purchase dual-use models.

The basic use of superhard cutting tool items

Tool of different types of knives and cutters of different materials, superhard cutting tool diamond tool explain the basic use of items:
1, the tool cutting edge sds drill bits  products to be processed must be strictly adjusted to the center and the center height of the contour, is strictly prohibited below the center of the cutting.
2, PCD cutting tool main processing of copper, aluminum, zinc, alloys and other non-ferrous metals and rubber, plastics, bakelite, etc.
3, PCBN cutting tool main  wood drill bits processing hardened steel, cast iron, iron-based powder metallurgy and other ferrous metals.
4, PCBN tooling steel type workpiece, the workpiece should be greater than the hardness HRC40 or more. 5, PCBN cutting tool with a negative rake angle, for a positive rake angle and 0 ° rake angle of the tool, by increasing the inverted angularity compensation.
6, PCD cutting tool depth of no more than 3/4 tip is appropriate. PCBN no more than 2/5 of the dry polishing pads  tip is appropriate.
7, PCD milling available coolant. PCBN Milling can without coolant, suitable for dry cutting

the life of high speed steel circular saw blades

In order to maximize the reduction of the consumption of high-speed steel circular saw blades, each blade reduces cutting costs, increase plant productivity, the actual situation of the following applications for the proposal wants to follow:
1, the new blade test run:
To ensure long life, so that masonry saw blades   circular saws with a new blade (or replace the blade after each grinding) have a full running-in process, the cutting begins within 10 minutes, reducing the feed rate is very necessary The. The next 10 minutes before gradually speed up;
2, cutting and feed rate:
Cutting speed depends on the material being cut sections and toughness, this is difficult for cutting stainless steel, high toughness of the material, the slower the speed is very beneficial  concrete core bits to increase blade life. When the material cross section is small, can be an appropriate increase in engine speed;
3, correct and timely grinding blade:
Blade during operation, due to the role of external forces, the blade pitch and yaw rate, stress, etc. has changed, so there will be larger road saws; surface roughness, clip blade and other phenomena; timely grinding blade, serrated blade to re-raise the angle, pitch accuracy, high-speed steel circular saw blades will increase the use of results;
4, you can judge sawdust observe the  cup grinding wheels current state of cutting blade;
a, very fine sawdust or powdered cutting pressure indicates the size;
b, of a soft cut sawdust that overload;
c, long spiral wire sawdust expressed in good condition;

carbide drill bit selection

The so-called carbide is tungsten carbide powder as matrix, cobalt powder as a binder by pressurized sintering. Generally contain 94% tungsten carbide, 6% cobalt. Because of its high hardness, very wearable, a certain strength, suitable for high-speed cutting. But the  fibre discs  toughness is poor, very brittle, in order to improve the performance of cemented carbide, and some use carbide substrate in a chemical vapor deposition on a 5-7 micron layer of special hard titanium carbide (TIC) or titanium nitride (TIN), to has a higher hardness. Some use ion implantation technology, titanium, nitrogen, and carbon injection the matrix certain depth, not only improves the hardness and strength and regrinding the drill can move into when they injected ingredients. There is a physical method to generate the bit at the top of a layer of diamond film, which greatly improves the hardness and wear resistance of the drill.
Drill material selection
The processing characteristics of the material required bit has the following characteristics: hardness of the drill must be greater than the hardness of the workpiece; drill workpiece as to withstand a considerable torsional and axial forces, it must have sufficient strength and toughness; Since the processed material toughness, requiring cutting edge sharp enough, so the tool material must have sufficient wear resistance, so as to reduce the work hardening; Since the chemical properties of the workpiece to be higher, thus requiring the tool material and titanium affinity worse in order to avoid the spread of stroke caused by sticking knife, broken drill phenomenon.
Currently, the tool for doing extremely numerous types of materials, including tool steel, carbide, superhard materials.
Initially, attempts to carry out the ordinary high-speed steel drills coated test, inexpensive ordinary high-speed steel drills, when using coating technology, can significantly reduce the friction coefficient of the tool and the workpiece, to improve tool life. However, due to the higher speed machine, using drill strong enough, causing the  wet polishing pad drill breaks during processing, the effect is not ideal.
Carbide is the latest developed a tool material, suitable for most materials, rough finish, such as steel, cast iron, special materials and plastics. To this end, decided to use solid carbide drill bit.
Drill grinding to determine the parameters
1 Twist the main auxiliary plane
Twist several major auxiliary plane base surface, cutting plane, the profile and column profiles.
If you do not consider supplementary motor, the main cutting edge twist drill of any point on the base surface, the architectural features of the twist drill, drill points on the main cutting edge of the base surface is variable.
Any point on the main cutting edge of the cutting plane, a cutting direction but contains the point tangent to the plane of the surface of the machining point. Perpendicular to the cutting plane and the base plane, and the main cutting edge of the cutting plane of the points are not the same. Any point on the main cutting edge of the column cross-section through the center line of the drill point and the center line of the cylindrical surface and do, the main cutting edge on a different type of column cross-sectional radius of the cylindrical face.
2 Twist drill main geometric parameters of the selection
Twist drill main geometric parameters include the choice of angle drill, drill cutting edge rake angle and clearance angle choice drill bit life helix angle on edge of impact analysis and related processing.
Drill angle determines the width and drill chips the size of the anterior horn. When the drill diameter and feed rate constant, increasing the angle, the iron narrowing unit to reduce the load on the cutting edge. Angle has a great influence on the rake angle, a corresponding increase in angle will help to improve terrible at cutting conditions. Influence the direction of chip flow angle. According to the relevant tool design data, combined with the hardness of the processed products is not high, but the viscous characteristics, select the drill angle of 140 °.
The first twist angle is other geometric parameters of the bit decision. In high-speed cutting machine tools, rake angle on the cutting deformation and cutting force has little effect, while using a smaller rake angle can be enhanced tip strength. This angle is determined, after the angle, the more sharp edge, but it will be reduced accordingly wedge angle impact tool strength and heat dissipation area. To this end, the selected bit smaller horn, taken as 8 °.
3 drill bit life helix angle on impact analysis
Shows the shape characteristics of the  9 inch saw blade twist drill points on the cutting edge is variable helix angle, the helix angle of a direct impact on the rake angle of the main cutting edge. Helix angle is larger, the more sharp edge, cutting more light, otherwise it will cause severe hardening makes the blades wear out quickly. According to the relevant tool design data, take the helix angle of 30 ° to meet the application requirements, while allowing for mass production.
4 edge correlation processing
The processing includes chisel edge correction, chamfering and inverted blade and other measures. For the material to be processed, machining properties, processing parameters and conditions such as clamps, cutting edge of the bit for a suitable passivation, improve drilling performance of the drill bit, reduce tool wear.
Coating technology
In the case of constant cutting parameters, in order to improve production efficiency and reduce production costs, use of the tool coating technology to reduce tool wear, in order to improve tool life is increasingly becoming a trend.
Tool coating refers to the strength and toughness of cemented carbide or high speed steel (HSS) surface of the substrate by vapor deposition method, a thin layer of good wear resistance of the coating of refractory metal or non-metal compounds. As a chemical barrier coating and thermal barrier, reducing the tool and the workpiece between the diffusion and chemical reaction, thereby reducing tool wear. Coated tool with high surface hardness, good wear resistance, chemical stability, heat resistance, oxidation, friction factor is small and low thermal conductivity and other characteristics.
After coating the drill after a number of processing has been improved significantly, unit cost is greatly reduced.
Carbide hardness and strength, not only the ratio of cobalt and tungsten carbide, but also with the powder particles about. Carbide drill ultra fine particles, and its average grain size of tungsten carbide with 1 micron or less. This bit is not only high hardness and compressive strength and flexural strength are improved. To save costs Many drill shank welded structure, the original as a whole are carbide drill, drill shank back now made of stainless, but significantly reduced the cost of the material due to different concentricity less than its dynamic rigid whole alloy drill, particularly in the small diameter side.

film diamond

 Diamond film synthesis technology and applied research on a global scale has grown rapidly, forming a "diamond film hot." In ten years, the development of gas-phase synthesis method to twenty kinds, general hourly rate of deposition is only 1 ~ 2um, how to accelerate the  deposition rate has been one study. Recent developments in the deposition rate to 100um / h or more, up to 930um / h. We call thick diamond. Diamond is a pure diamond thick, close to the hardness of natural diamond, and PCD, PCDN diamond powder is mixed with the binding agent is sintered, so by the binding agent of the concrete diamond blades  hardness, the hardness as the former. China has successfully mastered this technique, the maximum sediment thickness reaches 2.3mm. Has now been commercialized into the international advanced level.
PCD diamond thick film is that no different from the binding agent, is a pure diamond, the diamond core drills  higher its hardness, and natural diamond different, it has isotropic, low cost, so in many respects replaced PCD. Will be used for wire drawing dies uniform wear, so much better than the quality of the wire wire drawing natural diamond dies. If the deposition further improve the quality in ultra-precision machining is also the possibility of replacing natural diamond, the field of ultra-precision so popular attention.
In short, diamond and superhard materials as superior performance, application constantly expanding, from the developed to the  cup grinding wheels metal processing optical glass processing, stone processing, ceramics processing, processing of brittle materials is difficult for traditional processing areas, for a variety of industrial development will play a huge role in promoting broad prospects.

diamond cutting primary process

The first diamond cutting discs work! Diamond cutting discs at the moment the use of steel and concrete core bits  other industries are relatively trivial.
       So the primary vocals diamond cutting disc is welded diamond cutting discs: sub-frequency welding and marble polishing pads  laser welding are two, high-frequency welding pass is too high coagulation medium tip and the substrate will be welded, laser welding laser beam through the head too low Marginal touch with the matrix resulting metallurgical melting beans cut. Sintered diamond cutting discs: min cold sintering and cup grinding wheels  hot pressing are two constraints sintering.
    Diamond cutting discs: the powder through the process of electroplating way head attached to the substrate.