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 .
grinding cup wheels
2014年1月7日星期二
2013年11月10日星期日
The introduction of the surface roughness of diamond grinding wheel
The machined parts diamond grinding wheel surface , there will always be some macro and micro geometry errors , part on the surface of microscopic diamond wheel geometry error is determined by the parts on the surface of a series of tiny diamond wheel spacing valley wood band saw blades formed , these tiny undulating valley called the degree of surface roughness of diamond wheel parts .
Surface roughness is a measure of diamond wheel diamond grinding wheel surface machining precision parts is an important indicator of the surface roughness of diamond wheel parts will affect the level of two parts in contact with the surface of the diamond wheel friction , motion surface wear , the bonding surface sealing , with a surface of the working precision , the fatigue strength of the rotary member , the appearance of diamond blade circular saw parts , etc., even on the part of diamond grinding wheel has an impact on the corrosion resistance of the surface . 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 metal drill bits currently 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 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 .
Surface roughness is a measure of diamond wheel diamond grinding wheel surface machining precision parts is an important indicator of the surface roughness of diamond wheel parts will affect the level of two parts in contact with the surface of the diamond wheel friction , motion surface wear , the bonding surface sealing , with a surface of the working precision , the fatigue strength of the rotary member , the appearance of diamond blade circular saw parts , etc., even on the part of diamond grinding wheel has an impact on the corrosion resistance of the surface . 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 metal drill bits currently 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 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 .
2013年8月16日星期五
circular saw blade dynamic
Dynamic operation stability of the circular saw blade is a blade in the cutting processing, maintaining its inherent shape and stiffness properties. Job stability than the saw blade and the industrial saw blades frame band saws poor, mainly because of large blade diameter to thickness ratio, and only the clamping disc holding the spindle rotates at high speed can not be tensioned. Part of the body alone saw serrated metal binding force, it maintains a certain rigidity. When the blade rotates at high speed, the centrifugal force, the saw tooth edge portion of the body begins to relax, in addition, timber sawing, the saw tooth edge portion of the body temperature rise sharply, volume expansion, and the blade but also by material constraints can not be arbitrarily scalable, large internal deformation occurring outside the small, on both sides of the blade to swim, was "hunting" state, causing rough sawn wood surface waves.
First, the centrifugal force
Rotating blade, the saw body parts of the material are subject to the centrifugal force.
Second, the impact of cutting heat and displacement caused by temperature gradients
Saw cutting work, saw tooth edge portion of the body temperature is higher than the temperature of the rest of the blade on the outside there is a high internal temperature low, according to Mote, Szymani other scientists' research results, for the 1mm thick blade, When the blade in the floor polisher pads radial direction of the temperature difference reaches 9 ℃, the blade wavy deformation occurs. Also exacerbated instability in the blade work.
Third, the circular saw cutting runout and lateral vibration on Processing Quality
Cutting circular saw blades, due to the number of teeth and more, chip thickness of only hundredths of a millimeter. So rather small radial deviation will be on chip thickness have a great impact, in addition to radial runout effects, the lateral vibration of the processing quality, especially surface roughness has a great influence.
Four, vibration analysis
Vibration of the saw blade is in its equilibrium position the blade reciprocating lateral movement. Vibration caused by external interference, and always behave as some kind of "class." Vibration of the blade during cutting can not be compensated, the vibration will increase sawing path loss, reduced cutting accuracy, increase the noise level and shorten tool life.
Fifth, the concept of stability
Saw work there is always a certain vibration, but not necessarily instability. The critical instability conditions, even if a frequency is zero or very small lateral forces can cause very large lateral displacement of the blade. Instability saw blade vibration theory is the sanding discs study of the most important fields.
Six, critical speed theory
Theoretical critical speed is determined by Lapin and Dugdale introduced into the study of circular saw blades, before this theory is mainly used in the design of turbine research.
Seven, plane stress
The initial blade manufacturing residual stress include stress, suitable for tensile stress. Rotary cutting blade, will turn with stress, thermal stress and the stress caused by cutting force. All of these stresses can be considered as plane stress.
1, suitable for tensile stress
2, the rotary stress
3, thermal stress
4, the cutting stress
Eight, to improve the dynamic stability of a blade
1, suitable for sheets
2, saw themselves slotted
3, the guide
4, the thermal stress control
First, the centrifugal force
Rotating blade, the saw body parts of the material are subject to the centrifugal force.
Second, the impact of cutting heat and displacement caused by temperature gradients
Saw cutting work, saw tooth edge portion of the body temperature is higher than the temperature of the rest of the blade on the outside there is a high internal temperature low, according to Mote, Szymani other scientists' research results, for the 1mm thick blade, When the blade in the floor polisher pads radial direction of the temperature difference reaches 9 ℃, the blade wavy deformation occurs. Also exacerbated instability in the blade work.
Third, the circular saw cutting runout and lateral vibration on Processing Quality
Cutting circular saw blades, due to the number of teeth and more, chip thickness of only hundredths of a millimeter. So rather small radial deviation will be on chip thickness have a great impact, in addition to radial runout effects, the lateral vibration of the processing quality, especially surface roughness has a great influence.
Four, vibration analysis
Vibration of the saw blade is in its equilibrium position the blade reciprocating lateral movement. Vibration caused by external interference, and always behave as some kind of "class." Vibration of the blade during cutting can not be compensated, the vibration will increase sawing path loss, reduced cutting accuracy, increase the noise level and shorten tool life.
Fifth, the concept of stability
Saw work there is always a certain vibration, but not necessarily instability. The critical instability conditions, even if a frequency is zero or very small lateral forces can cause very large lateral displacement of the blade. Instability saw blade vibration theory is the sanding discs study of the most important fields.
Six, critical speed theory
Theoretical critical speed is determined by Lapin and Dugdale introduced into the study of circular saw blades, before this theory is mainly used in the design of turbine research.
Seven, plane stress
The initial blade manufacturing residual stress include stress, suitable for tensile stress. Rotary cutting blade, will turn with stress, thermal stress and the stress caused by cutting force. All of these stresses can be considered as plane stress.
1, suitable for tensile stress
2, the rotary stress
3, thermal stress
4, the cutting stress
Eight, to improve the dynamic stability of a blade
1, suitable for sheets
2, saw themselves slotted
3, the guide
4, the thermal stress control
2013年7月31日星期三
Three diamond cutting discs are used
Currently used to cut materials whenever compared to diamond hard, diamond cutting disc for abrasive industry is in a high position in the match, although the price is cheap, and grinding cup wheel trust in the future of the diamond cutting should be performed better experience
Integration with the domestic market, especially after learning of foreign ancestors craft cutting discs, diamond cutting skills abroad will become more junior.
Future diamond cutting discs there is a very large market, because the rock-cut diamond cutting tool is most useful, therefore, superficial discussion of stone cutting mechanism and the wear mechanism of diamond cutting equipment, diamond cutting things about the diamond grinding wheel production and the correct use reasonable means must exist
Pros and cons of diamond cutting discs varieties often much worse for other cutting material, cutting discs differences with other states with poor qualities of the diamond cutting discs currently abroad or in the sanding belt discussion behind developed world standards
In the abrasives industry, diamond cutting discs with a control instrument is universal, its primary notice is diamond cutting discs were faithful reason, rough cutting equipment is very common, so check abrasive industry in the development of particularly wide wide development of space
Integration with the domestic market, especially after learning of foreign ancestors craft cutting discs, diamond cutting skills abroad will become more junior.
Future diamond cutting discs there is a very large market, because the rock-cut diamond cutting tool is most useful, therefore, superficial discussion of stone cutting mechanism and the wear mechanism of diamond cutting equipment, diamond cutting things about the diamond grinding wheel production and the correct use reasonable means must exist
Pros and cons of diamond cutting discs varieties often much worse for other cutting material, cutting discs differences with other states with poor qualities of the diamond cutting discs currently abroad or in the sanding belt discussion behind developed world standards
In the abrasives industry, diamond cutting discs with a control instrument is universal, its primary notice is diamond cutting discs were faithful reason, rough cutting equipment is very common, so check abrasive industry in the development of particularly wide wide development of space
2013年7月25日星期四
Classification and granite structure features a variety of
so the variety, there are a variety of classification. Sub-divided according to types of minerals contained in black granite, muscovite granite, hornblende granite, two-mica granite. 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. Press contain minerals can be divided into cassiterite granite, niobium ore granite, granite containing beryllium, lithium mica granite, tourmaline granite. Common length petrochemical, greisenized, electrical and petrochemical since metamorphism.
Granite compact structure, high compressive strength, low water absorption, surface hardness, good chemical stability, durability, fire resistance, but poor. Granite was fine, the diamond cup grinding wheel grain, coarse granular structure, or porphyritic structure, fine uniform particles, the gap is small (porosity of 0.3% to 0.7%), water absorption is not high (water absorption is generally 0.15 % ~ 0.46%), with good frost resistance. High hardness of granite, its Mohs hardness of about 6, a density of 2.63g/cm3 to 2.75g/cm3 in between, the compression strength of 100-300MPa, in which fine-grained granite up to 300MPa or more, flexural strength sanding belt Average at 10 ~ 30Mpa. Often granite batholith, rock plants, rock and other forms of output, and is subject to regional tectonic control, generally larger than the size distribution is relatively broad, so mining convenient, easy out aniseed, and its joint development with the law, help shape the rules mined stone. Shortage of granite into high, can carry a variety of machining, sheet metal can fight good. There weathered granite is not easy, I can do diamond tools manufacturer outdoor decorative stone. Granite texture uniform texture, color, although dominated by light colors, but also very rich in red, white, yellow, green, black, purple, brown, beige, blue, etc., and relatively little change in its color, suitable for large the area of use.
Granite compact structure, high compressive strength, low water absorption, surface hardness, good chemical stability, durability, fire resistance, but poor. Granite was fine, the diamond cup grinding wheel grain, coarse granular structure, or porphyritic structure, fine uniform particles, the gap is small (porosity of 0.3% to 0.7%), water absorption is not high (water absorption is generally 0.15 % ~ 0.46%), with good frost resistance. High hardness of granite, its Mohs hardness of about 6, a density of 2.63g/cm3 to 2.75g/cm3 in between, the compression strength of 100-300MPa, in which fine-grained granite up to 300MPa or more, flexural strength sanding belt Average at 10 ~ 30Mpa. Often granite batholith, rock plants, rock and other forms of output, and is subject to regional tectonic control, generally larger than the size distribution is relatively broad, so mining convenient, easy out aniseed, and its joint development with the law, help shape the rules mined stone. Shortage of granite into high, can carry a variety of machining, sheet metal can fight good. There weathered granite is not easy, I can do diamond tools manufacturer outdoor decorative stone. Granite texture uniform texture, color, although dominated by light colors, but also very rich in red, white, yellow, green, black, purple, brown, beige, blue, etc., and relatively little change in its color, suitable for large the area of use.
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