Application and the status of Diamond tools

 As the world economic development, improving people's living standards, natural stone (granite, marble), jade, advanced artificial stone (ceramic stone), ceramic, glass, and cement products, has been widely used in homes, buildings decoration objects, used in the production of a variety of decorations, household items and applications in road, bridge construction. On the processing of these materials, we need a variety of diamond tools.
   Last 10 next year, Chinese production  GUSHI concrete diamond blades of diamond tools business has developed rapidly. Judging from the number of enterprises, production of diamond tools business nearly a thousand, annual sales income of more than ten billion. Jiang Zhongguo production of diamond tools business as much as a large scale, is any other country in the world can not be compared, will become the world's diamond tools supply base. Some varieties of Chinese diamond tools also has a high level of quality, a number of brand-name foreign diamond tools also commissioned the production of Chinese enterprises. However, most of the production of most of the products are of substandard quality, low price products. Although many number of Chinese exports diamond tools, most of them low-priced products, known as 'junk'. Even high-quality products, which meet or exceed the quality of similar foreign products, because it is made in China, but also can not afford to sell at good prices, seriously affect China's image. What is the reason for this situation is? To sum up two main reasons. First, the low level of technology. Development of diamond tools production technology has been divided into three stages. The first stage is used for elemental powders by mechanical mixing matrix plus diamond diamond tool production process. This process is prone to segregation of components; sintering temperature is high, likely to cause graphitization of the diamond, the diamond of lower intensity. Due to a combination of various matrix materials are mechanical, not fully alloyed diamond matrix package inserts for poor, difficult to produce high-end products. The second stage is the use  GUSHI cutting discs of pre-alloy powder for mixing matrix plus diamond diamond tool production process. This process is due to be fully alloyed matrix material, the sintering temperature is low, the diamond will not reduce the strength of the ingredients to avoid segregation of the diamond package inserts produce good results, the diamond features play very well. For carcass production with pre-alloy powder diamond tools, high-efficient, slow decay characteristics that can produce high quality diamond tools. The third stage is the use of pre-alloy powder as matrix, using diamond ordered (multi-layer, uniform diamond) technology. This technology is the technical advantage to accommodate pre-alloy powder, in turn ordered diamond, the diamond had to make full use of each piece, mechanical mixing process overcomes the uneven distribution of the diamond to bring serious defects affecting the cutting performance , is the world's production of diamond tools, the latest technology. In commonly used? 350mm diamond cutting discs, for example, the cutting efficiency of the first stage of the technical 2.0m (100%), the second stage of the technical cutting efficiency is 3.6m (up to 180%), the third phase cutting efficiency technologies 5.5m (up to 275%) or more. The first phase of the technology in China currently produces diamond tools in the enterprise, 90% still use less than 10% of companies use the second phase of the technology, the use of individual third stage technology companies. Is not difficult to see that the current Chinese enterprises in the production of diamond tools, a few companies are fully capable of producing quality products. However, the vast majority of companies still use the traditional, outdated technology.
Second, vicious competition. Diamond tools are consumables market demand. According to the current technology of the GUSHI dry core drill bits  first stage production of diamond tools, diamond tools on new business easier. In not too long a time, the Chinese production of diamond tools business reached nearly a thousand. ? To commonly used 105mm diamond saw, for example, the product level is the 'quality' of prices above $ 18, about 10%; product grade is 'standard', the ex-factory price of about 12 yuan, accounting for 50% ; product grade 'economy', the ex-factory price of around 8 yuan, accounting for about 40%. These three products is calculated according to the average social cost, 'high-quality' margin products can reach more than 30% profit margin 'standard' products can reach 5 to 10%, 'economy' products can only be guaranteed as well, most Enterprise prices are below $ 8, and even as low as 4 yuan.

Some of the major role of Core Drill Bits

First, what is the drill
Is used to drill a workpiece to drilling tools.
Drill generally just (W18Cr4V or W9Cr4V2) made ​​of high-speed, divided twist , flat drill, center drill , countersink hole drilling, deep hole drilling , which is our twist fitter , machining the most  GUSHI metal grinding wheel common drill .
This is a paper I have to talk about is the main method of twist drill sharpening its restructuring . I began to talk about from the twist , first introduces the basic knowledge under twist .
Twist the type and structure:
Straight shank twist drill into , Morse taper shank . Generally straight shank twist drill diameter 13mm or less in diameter Morse taper shank twist drills are in 13mm or more. Typically the twist handle , neck , working part , wherein the working portion and the guide portion , the cutting part . Specifically as shown in Figure
( A ) the handle - is generally used to transfer the clamping force and a smaller diameter than Φ13 mm straight shank drill made ​​it , no clear straight shank drill neck , the diameter of the drill , trademark etc. engraved on the handle directly . Φ13 mm and a diameter greater than generally made taper shank drills , taper shank drills taper is produced according to national standards , according to the size of the drill diameter and made Mohs 1 #, 2 #, 3 #, 4 #, 5 #, etc. taper, the larger the size of the handle numeral greater . Flat tail taper the ends for easy removal and  GUSHI diamond bandsaw blades transfer torque from the drill bit role.
( 2 ) Neck - The neck is connected to the handle portion and a portion of the work , but also for the grinding wheel retraction drill is used , the diameter of the drill itself , materials and trademarks are engraved on the neck.
( 3 ) working part - it is divided into two parts ① cutting guide and the guide portion twist to the right direction to keep working , and when re- sharpening drill bits , cutting guide portion and gradually become part and to work. The guide portion has two parallel helical grooves , is to be formed to accommodate the cutting edge and the removal of the GUSHI turbo diamond blade  chips and facilitate the input of the cutting fluid . There are two edges with a guide portion , its diameter is slightly inverted cone , every 100mm length , shank diameter is reduced to 0.05-0.10mm, both to guide the direction of the drill bit cutting , but also can reduce the drill hole wall friction . ② a key part of the cutting portion of the drill bit , the flank twist of six , five blade consists of: a rake face comprising two , two rear flank , two sub behind the two main cutting edges , two auxiliary cutting edge , a horizontal edge , namely " a sharp three blade ." As shown in Figure
Through these two points , I believe we have fully understood the basics of the drill point , so I can deeper introduce myself sharpening methods and steps up .
Twist mainly by cutting part of the cutting , but we have to start from the drill bit is also part of the transformation . Start sharpening my own way to start talking .

Characteristics of diamond tools and applications

1, using a diamond low coefficient of friction, and non-ferrous metal

affinity characteristics of small diamond-hard metal cutting tools, saw

blades can be processed copper, aluminum, iron, etc., but do not stick

a knife, diamond tools and cutting tools can  GUSHI diamond hole saw effectively prevent the

occurrence of metal bonding .
2, used for processing high hardness nonmetallic materials, such as

glass fiber reinforced plastic, filled silicone materials and other new

materials.
3, diamond tools, saw blades easy passivation, cutting small

deformation, high surface quality can be obtained.
Diamond tools for our manufacturing industry with a lot of efficiency

and convenience, then I do not know the performance characteristics of

the diamond tool know how much?
Diamond tool is mainly used for grinding and abrasive, diamond pen made

for some wheel dressing, only a small diamond welding or mechanical

clamping method of fixing the shank, ground into the desired angle as

the cutting tool.
Diamond tools have high hardness and wear resistance. Its hardness of

cemented carbide hardness higher  GUSHI concrete diamond blades than several times, so it has good

machinability and tool life. In the processing of plastics, diamond

tools durability hundreds of times higher than the carbide.
Diamond tools have high wear resistance (natural diamond 80-120 times

the wear resistance of carbide, synthetic diamond is 60-80 times), plus

fly: to achieve an accuracy guarantee. Processing material hardness is

higher, this superiority is also more prominent. PKD tool high

processing costs, its rough prices are expensive compared to using the

tool cutting PKD consuming and laborious, and the rejection rate is

quite high. Apart from the geometry GUSHI masonry drill bits  and dimensions of a manufacturing

error, but due to the brittle material PKD high, prone to chipping on

the cutting edge gap, which is difficult to describe the precision tool

manufacturers for production and processing of PKD tool when done. PKD

tool in the development process, and now there may be more economical,

more quality PKD tool to ensure that such production and processing,

the spark is a good method of processing PKD cutting tool.

How to make a diamond grinding wheel wear slower reasons

Diamond Wheel in our daily lives has become so widespread, that how can you wear diamond wheel is often slow, you know? If you do not know to give with Xiaobian look at it.
Select the diamond grinding wheel hardness general principle is: the processing of soft metal, in order not to make premature loss of abrasive, then use a hard wheel. Wear resistance and long life. Diamond grinding wheel ratio up to 3500-5500, a hundred times higher than normal corundum grinding wheel, 3-5 times higher than ordinary diamond wheel. When  GUSHI diamond polishing tools processing hard metal, in order to make timely blunt grit off, thereby exposing new abrasive grains with sharp edges (ie, self-sharpening), use a soft wheel. Or because the soft material in the grinding wheel abrasive wear is slow work, without departing too early; latter is because the grinding of hard materials, abrasive wear of the grinding wheel work faster, require faster updated. High efficiency, good overall economic efficiency. Grinding sharp, small grinding force, diamond grinding wheel dressing cycle length, less the amount of dressing, long replacement time; long life cycle, grinding ratio, getting a better economy, use good shape retention, without regular Replace the wheel and wheel dressing, saving time and improving working conditions conducive to machining operations. In the grinding force and grinding conditions are low speed after using diamond grinding wheel, and its distribution on the surface of a large number of angular, consistent diamond abrasive wear reflective facets. This is GUSHI circular blades  mechanical wear due to mechanical friction and superhard abrasive diamond material produced. This wear is gradual, with the amount of wear of the abrasive grinding stroke length proportional relationship.
At higher temperatures the grinding conditions grinding zone, diamond grit diamond wheel on and graphite oxidation and loss. According to the nature of the diamond understood, oxidation, depending on the degree of graphitization of the diamond abrasive crystals integrity, and the degree of graphitization and also on the crystal orientation. Good crystal perfection diamond abrasive, oxidation, low degree of graphitization loss.
On the part of diamond grit diamond wheel surface localized fracture and fragmentation, resulting in whole shedding. Cleavage  GUSHI stone drill bits occurs diamond abrasive damage. Since the crystal cleavage plane of rupture was determined by the crystal structure of factor 7 bond type, intensity and distribution of the generated, which is often generated along the surface of the orientation strength of the final bond. Random distribution of grains to determine their cleavage occurred damage is inevitable.

Alloy circular saw blades that content quality inspection

Core Tip:. ① substrate surface finish inspection, application plug blade hole detection, or the naked eye holes over the surface of the knife if there is full contact with the blade edge ruler detect flatness or wavy and pot-shaped, with the end
①. Matrix test surface finish, blade hole  GUSHI colde saw blade plug detection application, or the naked eye hole cutter with completely over the contact surface with the knife blade flatness ruler detection or wavy and pot-shaped, with a client-side jump jump cytometry tooth holder has an oxide or glitches with durometer hardness uniformity detection surface rust and other indicators.
②. Weld inspection wire fluidity, weld strength, welding burns oxide should not be beyond the undercut, solder alloy tooth deflection degrees, depending on the angle between the bottom and the minimum width of the alloy matrix should not be less than 1.2mm, it has cracks, oppose any Alloy Welding pressure detection firmness.
③. Grinding teeth grinding detection plane A, B two tables side by checking with moderate (by surface contact pin) suitable level contacts, detect lateral angle, side front corner by applicable Point
Touch table shows how much depends on the thickness of the alloy with a dial gauge to check, only check the tooth GUSHI tile cutting blades  thickness, but the majority of the blade itself or wavy pot type parameter must have a bad end is always the best way to jump meter is the most accurate test, Also check the tooth surface finish, such as wheel apparent traces of some poor durability of the knife can not see the two flanks, accurate detection angle was still true after grinding. After checking the angle, in radians or allowed to produce clear signs of the wheel or the back rake angle, when the two sides of trails around the tooth jump in line, do not allow left or right high right low left high low, generally detected with a diameter hop, visual inspection main cutting edge in front of the human body is not allowed to  GUSHI carbide saw blades see any white lines, when Lee Tudor feel with obvious edge detected with visual clarity. Blade rake angle or rake smooth wheel Keys, no two blades, domestic mill still hand front corner motive or mechanical automata, often grinding rake angle wheel or front edge retraction pressure, causing the blade to produce an obtuse main cause The main reason the tool is not durable, Germany retract hydraulic lift with grinding function, so the product is very duo Lee grinding.

Alloy Saw What Precautions

One must carefully read the items mentioned in the manual cutting machines and packaging shell on the front. 2, according to the material being cut blade varieties to select and check the blade for cracks, distortion, lost teeth, do not use if damaged blade. 3, be sure GUSHI turbo diamond blade  to install the cutter blade guard when using the shell, and wear masks or protective eye. 4, please check before installing blade cutter spindle is beating, when you install the blade with flange and nut set tight, people must be the center hole of the blade and is firmly fixed on the flange, according to Taiwan after installation, gasket sets must be purchased after a good hand gently push the blade when the washer confirm whether the eccentric rotation shaking. 5 job to be cut before use after installation Alloy saw pre-turn for a minute, until the machine into operation. 6, when the non-automatic cutting operation, you must gently cut into the normal operation of the blade material is prohibited Forced straining hard to push. And prohibit reverse ban suddenly stopped in the middle of the blade material is cut, otherwise lead to jagged off, saw  GUSHI concrete polishing pads body deformation, prone to danger. 7, using hear abnormal sounds, see abnormal shaking or section does not usually stop the job and find the cause of the exception, the timely replacement blade. 8, please wipe the rust after cutting oil, to prevent the blade is not used for a long time and rust. 9, insert the blade perpendicular to the tool holder to hang in a dry, avoid damp areas. Do not place the blade flat on the ground, otherwise easily lead to blade deformation. Do not directly stacked multi-chip saw blade should be spaced packaging to avoid jagged collision should gently. 10, again when the blade is not sharp serrated grinding, grinding is not easy to destroy serrated timely original angle, the impact of cutting accuracy and shorten blade life.
First, how to choose the right blade?
1, the basic data: ① machine spindle speed, ② workpiece thickness and material, ③ saw blade diameter size and pore size (shaft);
2, selected on the basis: the number of revolutions of the spindle and intends to match the outer diameter of the blade computing, cutting speed: V = π × outer diameter D × revolutions N/60 (m / s) is generally reasonable cutting speed 60-90 m / second,
Specific recommendations:
Material cutting
Softwood 60-90 (m / s)
Hardwood 50-70 (m / s)
Particleboard, plywood 60-80 (m / s)
Cutting speed is too large, machine vibration, voice large blade stability is reduced, degradation processing, cutting speed is too small, reducing production efficiency. The same feed rate per  tooth cutting increased, affecting the processing quality and life of the saw blade. Because the blade diameter D and spindle speed N is a power function, in practical applications, a reasonable increase speed and reduce the diameter GUSHI diamond polishing tools  of the blade is most economical.
3, quality bid:
As the saying goes: "not good goods cheaper, better goods are not cheap," probably true for other commodities, but it is probably not the right tool tools Sure; crucial match. Job site on many factors: such as sawing device object, quality requirements, quality of personnel. Comprehensive assessment, rationally choose the best use, just right in order to save money, reduce costs, participation in the competition. It depends on the expertise of similar products and understand the information.

Coring drill automation into future trends

The primary steel ball locking style locking retainer lock . It is fitted with an interference surface of the tooth does not charge big bang for the relative behavior of the cone from the slot Migration to dip . .
   But in some extraordinary formations , such as the water of the old dam water through the soil hardness between 3 to 5 , and the uneven distribution of hard and soft , to soil mixing pile ( spray or powder form ) over the soil solid , conical coring drill guide ( envelope ) Bored Pile havoc caused by extreme degree . Up to avoid damage , and then use tungsten carbide to the need to have wonderful mechanical wear resistant stone polishing pads  applications are being fully carried out the study of the matrix changes the matrix pill high energy blast renew . The relations between implied by the following formula . Figure unit volume crushing power and angle of incidence of the jet off hog ' disagreement on the radius of the affected tooth disseminated on the fate of the rock breaking discipline differences dip radius line speed differences drilling teeth to move the process does not differ from the angular velocity level differences and thus the formation of teeth drilled differences the crushing effect of differences occurred on rock stress field .
 Conical head under the horizon  diamond polishing tools drilling 6h, footage inadequate lm, for simplified core drill straight error can not be applied sparingly . Scale structure simply does not manufacture the low- locking retaining ring bosses care more convenient loading and unloading using commonly used in low- abrasive soft formations steel. Finite element simulation and analysis of the effectiveness of the angle of incidence of the jet rock breaking influence the fate of the angle of incidence is the angle between the disciplinary jet jet axis normal to the underlying purpose of the rock profile between . Test try  pdc teeth cutting load for six kinds of differences between the mechanical properties of rocks and sanding discs  49 kinds of specifications pdc teeth  divergence angle of the front , side angle , chamfer cutting teeth structure , diamond profile roughness , cutting depth , cutting speed , mechanical properties of rock seven aspects  cutting load tests carried out with the cutting load testing and analysis related to the other to try to get a large amount of valuable  attempt data . Tapered core drill holes through the trial into a temper , can not meet the requirements of footage . Shock loads that occur close drilling impact resistance era . The performance is poor, can not guarantee the verticality into the hole .

Comparison with amorphous diamond CVD diamond grinding wheel

( 1 ) the difference between the amorphous diamond CVD diamond grinding wheel
   Amorphous diamond ( also called diamond-like carbon - Annotation ) is to adopt a carbon PVD coating deposition process . It has part of the diamond , but also has a part of SP2 carbon bond ; its high film hardness, but lower than the hardness of diamond films ; their  concrete polishing pads thickness than we usually deposited diamond film to be thinner . When machining graphite, amorphous diamond grinding tool life is 2-3 times uncoated carbide tools . Consistent contrast , CVD diamond deposition process is the use of pure CVD diamond wheel , tool life when machining graphite is 12-20 times carbide cutting tools , which can reduce the number of tool changes  diamond polishing tools to improve the reliability and precision machining sex .
( 2 ) diamond wheel life varies
  Like any other tool , diamond grinding tool life also varies , depending on the material to be cut , the choice of feed rate and cutting speed , as well as the geometry of the workpiece and the like. In general , processing of graphite diamond wheel tool life is 10-20 times uncoated carbide tools and may even longer in some cases . Thus , a tool can be done with almost any processing tasks without tool change due to tool wear and concrete ring saw  avoid the processing of the interrupt and recalibration , making it possible to achieve unattended processing. In the processing of composite materials , it is entirely possible to get a longer tool life. When it was reported in the processing of high-density glass fiber, carbon fiber composite materials difficult to machine , diamond grinding tool life up to 70 times is not coated carbide tools .

Characteristics of the diamond wheel to decide what

Diamond Wheel is a highly professional product, very few non-professionals for its understanding. Characteristics of the diamond wheel to decide what the majority of users are concerned , but also troubled by a user of important issues. Professionals that features a good diamond wheel is determined by the following factors:
By the characteristics of the abrasive wheel , grain size, hardness , binders , shape and other factors to determine abrasive grinding wheels  the size of the abrasive particle size selection , primarily related to the surface roughness and productivity . When roughing , grinding margin, requires a larger surface roughness values ​​should be used in coarse grains . Because coarse grains , large pores , grinding depth can be larger wheel clogging and fever. When grinding , margin is small, requiring a lower roughness values ​​, you can select finer grit . Generally speaking , the more fine abrasive grinding surface roughness as possible.
Concentration of diamond grinding wheel selection we understand the concentration of diamond grinding it? Refers  masonry drill bits to the concentration of the abrasive layer of the abrasive content . Today we have to say is how the concentration of diamond wheels were chosen , I hope you will like the following content.
① diamond grinding wheel generally 50 % -100 % concentration ; most 75% , the time required to finish higher than 75 %, forming the grinding wheel and requires a long life , can be 100% or more ;
② diamond products in general use 25% -150 % concentration ; cutting blade which coarse-grained , concentrations are concrete saws  generally higher than at the end , that is 25-50 % higher fine-grained ; while other metal bonded grinding wheel generally requires concentration to 50 % to 100 % concentration . Overall, with a higher concentration of coarse , semi- fine grinding with a moderate concentration , and grinding and polishing with a higher concentration .

Resin grinding wheel can not be stored in damp places

Insist on using the FIFO principle , be used during the best use to ensure wheel, resin grinding wheel use during the warranty period , if more than one year will need re-testing its strength and appearance , may continue to use the check. Wheel, resin grinding wheel requires a full , tight packaging , so as to ensure that transportation to and from the course without collisions. During transport needs careful not to get wet , away from alkalis items. Resin wheel to wheel and usually square and placed neatly , try  concrete ring saw not to tilt, do not let their pressure and prevent deformation. Wheel in the store when the use of wooden pallets Gechao mopping -out , avoid direct contact with the ground , from the ground requires 10cm to 15cm, the maximum height does not exceed 1m. The company has advanced production equipment and first-class technology . Product quality and perfect after-sales service , the main production and operation : ceramic grinding wheel, resin grinding wheel , abrasive series and other electrical products.
The wheel up from the melt rotation , relying on rotating grinding wheel blows excess impregnant . Whetstone holding abrasive grinding wheels  time in the air for 1-1.5 hours . Wheel according to this specification discard excess impregnant not formed on the diamond trimming the tumor , while the grinding surface of the plug is not greasy , and will not produce burns on the surface to be ground . Vintage stearyl wheel and immersion treatment is sulfur impregnation of the substrate to process a variety of wheel technology, can improve grinding performance, but there are some defects in the process of handling the final result is often used to reduce the effect of wheel . Our analysis of the reasons that these components can form a homogeneous melt , stearyl distributed above and below the sulfur distribution in  tile cutting blades contrast , modern technology is dipping treatment on the development of conventional treatment , were then placed in was heated to 130-135 ℃ impregnant composition in the melt , from 2.8 rpm / sec to stop the fall of the pulse with the rotation speed of four minutes . This will ensure that all components of impregnation evenly soaked in the wheel .