Angle grinding abrasives products as an integral part of industrial production and processing consumables, also commonly referred to as industrial supplies. Abrasives using a wide-ranging, mostly industrial production will use to industrial processing, industrial abrasives known as teeth reputation. Abrasives product features are only two, one cut two polished. Related Sanding disc to the industry, including machinery, equipment manufacturing, car polish, furniture polish, etc..
Abrasives Market
With China's economic development, the degree of progress in all walks of life are great, but also stimulated the development of abrasives industry, however, the development of abrasives industry and exposed some problems, technical product innovation, product energy conservation and other issues are restricting the abrasives industry. Abrasives industry zirconia flap disc with low barriers to trade, which created a whole industry is fragmented mess, there is no uniform production and quality standards.
As a special abrasive industry, metallurgical aspects of the problem of energy saving deposit abrasives, corundum deposit domestic overcapacity, with the national energy conservation policy implementation, the next step will eliminate corundum industry policy priorities backward production capacity. The next five years is expected to angle grinding abrasives industry keynote will also become the country's economic policy tone.
Experts believe that to maintain a healthy abrasive sanding belt and orderly development abrasive industry also needs to resolve the following issues: the production capacity of decentralized, small-scale, low efficiency, enterprise-scale structure of our country is still quite reasonable abrasive, low industrial diversity order Small enterprises still account for a large proportion; new product development capability is weak, the domestic abrasive products are set low-end market, low technological content of products, and the lack of high-technology products, mainly dependent on imports, only to meet the automotive, aerospace, machine tools , bearings, locomotives and ships and other industrial needs about 1/3; overcapacity, low product homogeneity serious, especially its alumina production.
"Twelve Five Year Plan" began to develop abrasive industry has brought great opportunities for development challenges. Energy saving, clean production will show in the production areas abrasive industries, in addition, the state will have a great impact on the development of production in the field of abrasive policy machinery, shipbuilding, automobiles, airplanes and so on. Abrasive enterprises should technological innovation and new product development direction to seek a breakthrough, the development of high-end abrasive products and reduce dependence on imports. The next five years is expected to angle grinding abrasives industry keynote will also become the country's economic policy tone.
2013年11月27日星期三
An abrasive belt grinding efficiency
An abrasive belt grinding efficiency , five times as common grinding wheel . Belt size can be large ( wide and 4m), for large area efficient processing , processing a wide range of materials .
2 small due to the heat generated by grinding disc friction and heat in good condition , which can effectively reduce the deformation of the workpiece with burns . However, due to the belt can not be trimmed , its precision is generally lower than the grinding wheel , as it is carefully processed , its dimensional accuracy up to 0.0012mm, flatness up to 0.001mm.
3 gap width between abrasive cutting edge , chip clogging , good machinability, for open belt grinding , breaking into new abrasive grinding zone , relatively speaking grinding wheel condition is more stable.
4 soft contact with the abrasive tools workpiece belt , belt can be affixed to the surface anti- grinding a variety of complex forming surface , and has a good run together, polished effect. Surface roughness Ra0.8-0.2 microns up .
5 adaptable, available in belt grinding lathe , vertical lathe, planer and other external circle , inner circle , plane grinding.
6 Auxiliary less time , after a positioning of the workpiece can be replaced several times to bring sand to complete all processing without replacing the balance to be carried like a wheel , and abrasive disc finishing work .
7 simple equipment, low manufacturing cost. Contact wheel rarely worn belt can maintain a constant speed ; transmission chain is short, increasing the stability of grinding , machine power efficiency up to 85% . However, consumption in general than belt grinding wheel consumption .
2 small due to the heat generated by grinding disc friction and heat in good condition , which can effectively reduce the deformation of the workpiece with burns . However, due to the belt can not be trimmed , its precision is generally lower than the grinding wheel , as it is carefully processed , its dimensional accuracy up to 0.0012mm, flatness up to 0.001mm.
3 gap width between abrasive cutting edge , chip clogging , good machinability, for open belt grinding , breaking into new abrasive grinding zone , relatively speaking grinding wheel condition is more stable.
4 soft contact with the abrasive tools workpiece belt , belt can be affixed to the surface anti- grinding a variety of complex forming surface , and has a good run together, polished effect. Surface roughness Ra0.8-0.2 microns up .
5 adaptable, available in belt grinding lathe , vertical lathe, planer and other external circle , inner circle , plane grinding.
6 Auxiliary less time , after a positioning of the workpiece can be replaced several times to bring sand to complete all processing without replacing the balance to be carried like a wheel , and abrasive disc finishing work .
7 simple equipment, low manufacturing cost. Contact wheel rarely worn belt can maintain a constant speed ; transmission chain is short, increasing the stability of grinding , machine power efficiency up to 85% . However, consumption in general than belt grinding wheel consumption .
2013年11月22日星期五
Abrasives scientific knowledge: the type and characteristics of introduction
Abrasives are used for grinding, lapping and polishing tools. Most artificial abrasive grinding with abrasive plus binders made from natural mineral rock is also useful for direct processing into natural abrasive. Abrasives except in machinery manufacturing and other metal processing industries are widely used, but also for the processing of food processing, paper industry and ceramic, glass, stone, plastic, rubber, wood portable belt and other non-metallic materials. Abrasive during use, when the blunt abrasive, the abrasive agent itself or in conjunction with portions broken broken abrasive grains from the partial or complete loss of the working surface of the abrasive article and the emergence of new cutting edge, sharp or continuously exposing new abrasive grains within a certain time so that the abrasive cutting performance can be maintained. This self-sharpening abrasive, is abrasive tool compared with the general prominent feature. As early as the Neolithic Age, humans had already started to use natural millstone processing knives, stone axes, bone, horn, and tools such as a tooth; 1872, appeared in the United States with a combination of natural abrasive clay firing Ceramic wheel; 1900, the advent of artificial abrasives, using artificial abrasives manufacturing have produced a variety of abrasives, grinding and create the conditions for the rapid development of grinding machine. Thereafter, the abrasive nature of the decreased proportion of abrasive. Abrasives their source of raw materials, natural and artificial abrasive abrasive categories. Commonly used in machinery industry is only natural abrasive whetstone. Artificial abrasive at the basic shape and structure of distinction, there are wheel, grinding, stone, sand tile (collectively, abrasive) and coated abrasives five. In addition, the habits of the abrasive slurry as a class. Abrasive used by the abrasive can be divided into ordinary abrasive abrasive and superabrasive abrasive. The former corundum and silicon carbide abrasive general, the latter made of diamond and cubic boron nitride and other superhard abrasive. In addition, there are some abrasive sanding belt special varieties, such as sintered corundum abrasives etc.. Ordinary abrasive abrasive is bonded abrasive solid ordinary form a certain shape and a certain intensity of abrasive. Generally abrasive, binder and pore structure, which is often called the abrasive three parts of the three elements. In abrasive abrasive cutting action from the. Binding agent is a solid form of the abrasive loose abrasive materials, inorganic and organic types. Ceramic inorganic binders, such as magnesite and sodium silicate; organic resin, rubber and shellac. The most commonly used is a ceramic, resin and rubber binders. Holes in the ground of debris from the chip and chip effect, and can accommodate coolant helps grinding heat dissipation. In order to meet some special processing requirements, the pores can also dipped some fillers, such as sulfur and paraffin, etc., to improve the performance of the abrasive. This filler is also called the fourth abrasive elements. Said ordinary abrasive abrasive characteristics of the project are: the shape, size abrasive, grain size, hardness, organization and binding agents. Grit abrasive hardness refers to the external force, from the degree of difficulty shedding the abrasive surface, which reflects the bond abrasive grip strength. Abrasive hardness depends mainly on how much amount of binder added density and abrasive grit off easily expressed low abrasive hardness; vice versa, which means that high hardness. Hardness level is generally divided into super-soft, soft, soft, medium, medium hard, hard and superhard grade seven, from these levels can be subdivided in a number of small magnitude. Abrasive hardness measurement method, more commonly used hand cone, mechanical cone method, Rockwell hardness measurement method and blast assay.
Hardness and its dynamic modulus of elasticity abrasive has a corresponding relationship, which is conducive to the use of audio measurement abrasive method to represent the dynamic elastic modulus abrasive hardness. In grinding, the high if they are grinding the workpiece material hardness, generally used in low hardness abrasive; contrary, the use of high hardness abrasive. Coarse abrasive organization into tight, medium and loose categories. And number of each class can be further subdivided, with the organization number to distinguish. Abrasives organization number the greater the share of abrasive in the abrasive volume fraction is smaller, wider gap between the abrasive, the more loose tissue. Conversely, the smaller the organization, said more tightly No. organization. Loose abrasive organization is not easy when you use passive, less heat during the grinding process, the workpiece can reduce heat deformation and burns. Tight organization of abrasive grains not falling, help keep grinding geometry. Abrasives be organized only in the manufacture of abrasive formula by control, generally do not make the determination. Superabrasive abrasive primarily by diamond, cubic boron nitride and binding agent to form a solid abrasive. Because of diamond, cubic boron nitride high price, with good abrasion resistance, they are made with ordinary abrasive abrasive abrasive different, except for super abrasive layer, as well as the transition layer and the substrate. Superabrasive layer is a part of the cutting action, the super abrasive grains and a binder composition. Base support care role is played in the grinding of metal, bakelite or ceramic materials. For connecting the substrate and the buffer layer superhard abrasive layer comprising a binder abrasive wheel and, sometimes, may be omitted. The binding agents are used resin, metal, plated metal, and ceramics. Bonded Abrasives manufacturing process are: distribution of material, mixing, forming, heat treatment, machining and inspection. With different binding agents, manufacturing processes are not the same. Vitrified abrasives used mainly-pressure method, the abrasive and binder weight ratio formula weighing, mixing evenly placed within the mixer, put in a metal mold in the press molding of abrasive rough. Blank firing kiln dried and then into the firing temperature is generally about 1300 ℃. When using a welded low-melting binder, the firing temperature is lower than 1000 ℃. Then the provisions of the exact size and shape processing, final inspection products. Resin bonded abrasives are generally molded in the press at room temperature, there is also pressurized with heating in a hot-pressing process under heating conditions. After forming in the hardening furnace hardening. The phenolic resin as binder, the curing temperature is 180 ~ 200 ℃. Rubber bonded abrasives used mainly for mixing roll machine and rolled into thin slices, then use a die cutter punching molding; also some with loose material, into the inner metal mold press forming. After vulcanization molding vulcanization tank, a temperature of 165 ~ 180 ℃. Metal bonded abrasives manufacturing process, there are two powder metallurgy and plating method, mainly for superabrasive abrasive. Bronze powder metallurgy as the binding agent, or after mixing by hot press molding at room temperature, and then sintering processing. Plating with nickel or nickel-cobalt alloy as the metal plating, according to the abrasive bonded to a plating process on a substrate made of abrasive. Special varieties of sintered corundum abrasives and grinding with abrasive fibers and so on. Sintered corundum abrasive is alumina powder and the amount of chromium oxide mixing, forming, sintering at about 1800 ℃. This abrasive compact structure, high strength, mainly used for processing watches, instruments and other parts. Abrasive fibers are adhered or containing abrasive filaments (eg nylon) as the raw materials made of, its flexibility, materials and products used in metal polishing.
Hardness and its dynamic modulus of elasticity abrasive has a corresponding relationship, which is conducive to the use of audio measurement abrasive method to represent the dynamic elastic modulus abrasive hardness. In grinding, the high if they are grinding the workpiece material hardness, generally used in low hardness abrasive; contrary, the use of high hardness abrasive. Coarse abrasive organization into tight, medium and loose categories. And number of each class can be further subdivided, with the organization number to distinguish. Abrasives organization number the greater the share of abrasive in the abrasive volume fraction is smaller, wider gap between the abrasive, the more loose tissue. Conversely, the smaller the organization, said more tightly No. organization. Loose abrasive organization is not easy when you use passive, less heat during the grinding process, the workpiece can reduce heat deformation and burns. Tight organization of abrasive grains not falling, help keep grinding geometry. Abrasives be organized only in the manufacture of abrasive formula by control, generally do not make the determination. Superabrasive abrasive primarily by diamond, cubic boron nitride and binding agent to form a solid abrasive. Because of diamond, cubic boron nitride high price, with good abrasion resistance, they are made with ordinary abrasive abrasive abrasive different, except for super abrasive layer, as well as the transition layer and the substrate. Superabrasive layer is a part of the cutting action, the super abrasive grains and a binder composition. Base support care role is played in the grinding of metal, bakelite or ceramic materials. For connecting the substrate and the buffer layer superhard abrasive layer comprising a binder abrasive wheel and, sometimes, may be omitted. The binding agents are used resin, metal, plated metal, and ceramics. Bonded Abrasives manufacturing process are: distribution of material, mixing, forming, heat treatment, machining and inspection. With different binding agents, manufacturing processes are not the same. Vitrified abrasives used mainly-pressure method, the abrasive and binder weight ratio formula weighing, mixing evenly placed within the mixer, put in a metal mold in the press molding of abrasive rough. Blank firing kiln dried and then into the firing temperature is generally about 1300 ℃. When using a welded low-melting binder, the firing temperature is lower than 1000 ℃. Then the provisions of the exact size and shape processing, final inspection products. Resin bonded abrasives are generally molded in the press at room temperature, there is also pressurized with heating in a hot-pressing process under heating conditions. After forming in the hardening furnace hardening. The phenolic resin as binder, the curing temperature is 180 ~ 200 ℃. Rubber bonded abrasives used mainly for mixing roll machine and rolled into thin slices, then use a die cutter punching molding; also some with loose material, into the inner metal mold press forming. After vulcanization molding vulcanization tank, a temperature of 165 ~ 180 ℃. Metal bonded abrasives manufacturing process, there are two powder metallurgy and plating method, mainly for superabrasive abrasive. Bronze powder metallurgy as the binding agent, or after mixing by hot press molding at room temperature, and then sintering processing. Plating with nickel or nickel-cobalt alloy as the metal plating, according to the abrasive bonded to a plating process on a substrate made of abrasive. Special varieties of sintered corundum abrasives and grinding with abrasive fibers and so on. Sintered corundum abrasive is alumina powder and the amount of chromium oxide mixing, forming, sintering at about 1800 ℃. This abrasive compact structure, high strength, mainly used for processing watches, instruments and other parts. Abrasive fibers are adhered or containing abrasive filaments (eg nylon) as the raw materials made of, its flexibility, materials and products used in metal polishing.
2013年11月20日星期三
Cubic boron nitride (CBN) grinding wheel is grinding carbide
Cubic boron nitride (CBN) grinding wheel is grinding carbide , glass,
ceramics , precious stones high hard and brittle material effects tools in
recent years, with high-speed ultra-precision grinding grinding technology
rapid development of grinding wheels made more high demand, ceramic resin
bonded grinding wheel can no longer meet
Production needs, because of its combination of metal bonded grinding wheel ,
high strength, good formability , long life and other significant
characteristics of the production has been widely used by metal-bonded
diamond wheels are manufactured in abrasive wheel different ways there are sintered ,
plating two types , in order to give full play to the role of super abrasive
abroad from the 20th century, the early 90s with a high temperature brazing
process to develop a new wheel, which wheel is still in the research and
development stage .
The cutting tool is a grinding wheel , which consists of many small and hard
abrasive particles and adhesive bonding agent made of the porous body .
Directly responsible abrasive cutting work must be sharp and has high
hardness, heat resistance and a toughness. Commonly used abrasive alumina (
also known as corundum ) and silicon carbide two kinds . Alumina-based
abrasive , high hardness, good toughness, suitable for grinding steel
material . Silicon carbide abrasive hardness is higher and more sharp , good
thermal conductivity , but more PSA sanding disc brittle , suitable for grinding cast iron and
carbide grinding wheel in the grinder as a cutting tool with the workpiece
machining side
France . The method is characterized by:
( 1) Since the abrasive grinding wheel itself has a high hardness and heat
resistance , high hardness can be processed so grinding materials such as
hardened steel , carbide, etc. . ( 2 ) determine the characteristics of the
grinding wheel and grinding grinding system can make even a trace cutting ,
general ap = 0.001 ~ 0.005mm; grinding speed is high , generally up to v = 30
~ 50m / s; grinder stiffness ; using hydraulic transmission, so grinding can
be obtained economically with high grinding disc precision (IT6 ~ IT5) and a small surface
roughness (Ra = 0.8 ~ 0.2μm). Grinding is one of the main methods parts
finishing . ( 3 ) As intense friction , leaving the grinding zone temperature
is high. This will cause the workpiece to produce stress and deformation of
the workpiece surface and even cause burns . Therefore, a lot of grinding
coolant must be injected to reduce the grinding temperature . Also from the
coolant and lubrication chip . ( 4 ) grinding large radial forces . This will
cause the machine - grinding wheel - workpiece system flexibility retreat ,
the actual depth of cut less than the nominal depth of cut . Therefore, the
grinding will be completed when the light is not to be infeed grinding to
remove the error . ( 5 ) After blunt abrasive , grinding force also increased
, resulting in grain crushing or off, re- exposing the sharp edge , this
feature is called " self-sharpening ." Self-sharpening of the grinding head
in a certain period of time to normal, but over a certain working time should
be performed after manual trimming , grinding force increases so as to cause
vibration , noise, and damage the workpiece surface quality.
ceramics , precious stones high hard and brittle material effects tools in
recent years, with high-speed ultra-precision grinding grinding technology
rapid development of grinding wheels made more high demand, ceramic resin
bonded grinding wheel can no longer meet
Production needs, because of its combination of metal bonded grinding wheel ,
high strength, good formability , long life and other significant
characteristics of the production has been widely used by metal-bonded
diamond wheels are manufactured in abrasive wheel different ways there are sintered ,
plating two types , in order to give full play to the role of super abrasive
abroad from the 20th century, the early 90s with a high temperature brazing
process to develop a new wheel, which wheel is still in the research and
development stage .
The cutting tool is a grinding wheel , which consists of many small and hard
abrasive particles and adhesive bonding agent made of the porous body .
Directly responsible abrasive cutting work must be sharp and has high
hardness, heat resistance and a toughness. Commonly used abrasive alumina (
also known as corundum ) and silicon carbide two kinds . Alumina-based
abrasive , high hardness, good toughness, suitable for grinding steel
material . Silicon carbide abrasive hardness is higher and more sharp , good
thermal conductivity , but more PSA sanding disc brittle , suitable for grinding cast iron and
carbide grinding wheel in the grinder as a cutting tool with the workpiece
machining side
France . The method is characterized by:
( 1) Since the abrasive grinding wheel itself has a high hardness and heat
resistance , high hardness can be processed so grinding materials such as
hardened steel , carbide, etc. . ( 2 ) determine the characteristics of the
grinding wheel and grinding grinding system can make even a trace cutting ,
general ap = 0.001 ~ 0.005mm; grinding speed is high , generally up to v = 30
~ 50m / s; grinder stiffness ; using hydraulic transmission, so grinding can
be obtained economically with high grinding disc precision (IT6 ~ IT5) and a small surface
roughness (Ra = 0.8 ~ 0.2μm). Grinding is one of the main methods parts
finishing . ( 3 ) As intense friction , leaving the grinding zone temperature
is high. This will cause the workpiece to produce stress and deformation of
the workpiece surface and even cause burns . Therefore, a lot of grinding
coolant must be injected to reduce the grinding temperature . Also from the
coolant and lubrication chip . ( 4 ) grinding large radial forces . This will
cause the machine - grinding wheel - workpiece system flexibility retreat ,
the actual depth of cut less than the nominal depth of cut . Therefore, the
grinding will be completed when the light is not to be infeed grinding to
remove the error . ( 5 ) After blunt abrasive , grinding force also increased
, resulting in grain crushing or off, re- exposing the sharp edge , this
feature is called " self-sharpening ." Self-sharpening of the grinding head
in a certain period of time to normal, but over a certain working time should
be performed after manual trimming , grinding force increases so as to cause
vibration , noise, and damage the workpiece surface quality.
2013年11月15日星期五
Read Abrasives science knowledge
Is for abrasive grinding , grinding and polishing tools . Most of the abrasive is made of abrasive plus artificial abrasive binding agent , is also useful natural mineral rock directly processed into natural abrasive. In addition to grinding and other metal processing machinery manufacturing industry has been widely used , but also for food processing, paper grinding wheel china industry and the ceramics, glass, stone, plastic , rubber, wood and other non-metal materials processing. Abrasive in use , when the blunt abrasive , because the abrasive agent or a combination of its own to break fracture , the abrasive grain from the partial or complete loss , the working surface of the abrasive grinding emerging new cutting edge , sharp or continuously exposing new abrasive grains , the abrasive can be maintained within a certain time cutting . This self -sharpening abrasive is abrasive tool compared with the general prominent feature .
As early as the Neolithic Age , humans had already started to process the application of natural stone knives , stone axes , bone , horn , and tools such as a tooth ; 1872 , appeared in the United States with natural abrasives combined with clay firing ceramic grinding wheel ; 1900 years ago, the advent of artificial abrasives , using artificial abrasives manufacturing have produced a variety of abrasives for grinding and grinding create the conditions for rapid development . Since then , natural abrasive in the abrasive proportion gradually reduced. Abrasives source of their raw materials , with natural and artificial abrasive abrasive categories. Commonly used in machinery industry is only natural abrasive Whetstone . Artificial abrasive characteristics according to the basic shape and structure of the distinction between a grinding wheel, grinding , stone, sand tile ( the foregoing collectively referred abrasive ) and coated abrasives five . In addition , it is customary also put abrasives abrasive as a class .
Bonded Abrasives are used by different abrasives can be divided into ordinary abrasive abrasive and superabrasive abrasive . The former corundum and silicon carbide and other common abrasive, the ceramic flap disc latter with diamond and cubic boron nitride and other superhard abrasive material. In addition, there are some special varieties, such as sintered corundum abrasive and so on.
By ordinary abrasive abrasive abrasive solid binding agent to form a certain shape common , and has a certain strength abrasive. Generally abrasive , binder and pore structure, these three parts are frequently referred to as the three elements of abrasive .
Abrasive abrasive cutting action play . Binding agent is a solid form of the abrasive loose abrasive materials , with inorganic and organic types . Inorganic binder with ceramic , magnesite , sodium silicate and the like; organic a resin , rubber and shellac . One of the most commonly used is a ceramic , resin and rubber binding agent.
Holes in the ground when debris from the role of the chip and the chip , and can accommodate coolant, helps grinding heat dissipation . To meet the requirements of certain special processing , the Bonded abrasives pores can be impregnated with certain fillers such as sulfur and paraffin , so as to improve the abrasive performance. Such fillers , also known as the fourth element of the abrasive . Means a common abrasive abrasive characteristics of the project are : shape, size abrasive , grain size, hardness, structure and bonding agent. Abrasive abrasive hardness refers to the external force from the abrasive surface of the shedding of degree of difficulty, it reflects the strength of binding agent holding abrasive . The hardness of the abrasive agent is added depends on the amount of binding and the density of abrasive , abrasive grains easily fall off indication low hardness ; vice versa , which means high hardness. Hardness level is generally divided into super-soft , soft, medium soft , medium, medium-hard , hard and superhard seven magnitude, from these levels can be subdivided in a number of small magnitude. Abrasive hardness measurement methods are more commonly used hand cone , mechanical cone method , Rockwell hardness measurement method and sandblasting assay .
As early as the Neolithic Age , humans had already started to process the application of natural stone knives , stone axes , bone , horn , and tools such as a tooth ; 1872 , appeared in the United States with natural abrasives combined with clay firing ceramic grinding wheel ; 1900 years ago, the advent of artificial abrasives , using artificial abrasives manufacturing have produced a variety of abrasives for grinding and grinding create the conditions for rapid development . Since then , natural abrasive in the abrasive proportion gradually reduced. Abrasives source of their raw materials , with natural and artificial abrasive abrasive categories. Commonly used in machinery industry is only natural abrasive Whetstone . Artificial abrasive characteristics according to the basic shape and structure of the distinction between a grinding wheel, grinding , stone, sand tile ( the foregoing collectively referred abrasive ) and coated abrasives five . In addition , it is customary also put abrasives abrasive as a class .
Bonded Abrasives are used by different abrasives can be divided into ordinary abrasive abrasive and superabrasive abrasive . The former corundum and silicon carbide and other common abrasive, the ceramic flap disc latter with diamond and cubic boron nitride and other superhard abrasive material. In addition, there are some special varieties, such as sintered corundum abrasive and so on.
By ordinary abrasive abrasive abrasive solid binding agent to form a certain shape common , and has a certain strength abrasive. Generally abrasive , binder and pore structure, these three parts are frequently referred to as the three elements of abrasive .
Abrasive abrasive cutting action play . Binding agent is a solid form of the abrasive loose abrasive materials , with inorganic and organic types . Inorganic binder with ceramic , magnesite , sodium silicate and the like; organic a resin , rubber and shellac . One of the most commonly used is a ceramic , resin and rubber binding agent.
Holes in the ground when debris from the role of the chip and the chip , and can accommodate coolant, helps grinding heat dissipation . To meet the requirements of certain special processing , the Bonded abrasives pores can be impregnated with certain fillers such as sulfur and paraffin , so as to improve the abrasive performance. Such fillers , also known as the fourth element of the abrasive . Means a common abrasive abrasive characteristics of the project are : shape, size abrasive , grain size, hardness, structure and bonding agent. Abrasive abrasive hardness refers to the external force from the abrasive surface of the shedding of degree of difficulty, it reflects the strength of binding agent holding abrasive . The hardness of the abrasive agent is added depends on the amount of binding and the density of abrasive , abrasive grains easily fall off indication low hardness ; vice versa , which means high hardness. Hardness level is generally divided into super-soft , soft, medium soft , medium, medium-hard , hard and superhard seven magnitude, from these levels can be subdivided in a number of small magnitude. Abrasive hardness measurement methods are more commonly used hand cone , mechanical cone method , Rockwell hardness measurement method and sandblasting assay .
2013年11月11日星期一
Belt as abrasive belt grinding of the workpiece is processed
Belt as abrasive belt grinding of the workpiece is processed , a new way of grinding process because of electrostatic sand-planting to protect abrasive belt belt arranged in average , sharp end of the outward processing a small amount of abrasive cutting action can simultaneously non woven flap wheel attack , the longer the abrasive belt circumference get good cooling , flexible belt easily adapted to different shape of the workpiece. abrasive belt grinding strengths , 1. consumption high effectiveness 2 . practical wide scale 3 . grinding good quality 4 . working capital is low.
Belt grinding is " cold " grinding , difficult to burn ; almost everything Information: metals, non-metallic , wood , marble, red sapphire , etc. are practical belt grinding ; variety of appearance: such as large three-dimensional, with material in a variety of complex -shaped appearance , wire appearance , are also practical belt grinding .
Tensioning roller diameter of 150mm, mounted on the bracket 1 , the bracket 1 is connected to the chassis 2 . Adhesive side abrasive cloth belt of the drive roller has a diameter of 200mm. Tensioning roller and the drive roller of the center distance of 500mm. Two cylinder length of 250mm in bracket 1 and frame 2 has two conditioning belt loose , tight installation. downward rotation wrench, ie, contraction spring , tensioner roller bracket with a landing ; then remove the bolts on the stationary frame 3 , the stationary machine curled up frame 3 . we put a ring belt width of 220mm , from passing through the stationary frame 3 , sub- glove tensioning rollers and drive rollers , fixed stationary frame 3 ; upward rotation wrench, namely spring elongation , together with the tensioning roller stand a rebound gradually belt is tensioned .
To avoid and overcome the belt deviation, tensioning rollers can influence , high and low skew , will attack an roloc disc absolute sliding velocity , hurried back to the central position of the belt on .
Stationary belt for rotating the workpiece moves with the feed to the still walks , the workpiece is achieved through the processing of the grinding zone in this belt grinding machine, can be inconvenient to change the type of belt ( coarse , medium and fine ) , with with varying degrees of rough appearance , even to the mirror .
Belt grinding is " cold " grinding , difficult to burn ; almost everything Information: metals, non-metallic , wood , marble, red sapphire , etc. are practical belt grinding ; variety of appearance: such as large three-dimensional, with material in a variety of complex -shaped appearance , wire appearance , are also practical belt grinding .
Tensioning roller diameter of 150mm, mounted on the bracket 1 , the bracket 1 is connected to the chassis 2 . Adhesive side abrasive cloth belt of the drive roller has a diameter of 200mm. Tensioning roller and the drive roller of the center distance of 500mm. Two cylinder length of 250mm in bracket 1 and frame 2 has two conditioning belt loose , tight installation. downward rotation wrench, ie, contraction spring , tensioner roller bracket with a landing ; then remove the bolts on the stationary frame 3 , the stationary machine curled up frame 3 . we put a ring belt width of 220mm , from passing through the stationary frame 3 , sub- glove tensioning rollers and drive rollers , fixed stationary frame 3 ; upward rotation wrench, namely spring elongation , together with the tensioning roller stand a rebound gradually belt is tensioned .
To avoid and overcome the belt deviation, tensioning rollers can influence , high and low skew , will attack an roloc disc absolute sliding velocity , hurried back to the central position of the belt on .
Stationary belt for rotating the workpiece moves with the feed to the still walks , the workpiece is achieved through the processing of the grinding zone in this belt grinding machine, can be inconvenient to change the type of belt ( coarse , medium and fine ) , with with varying degrees of rough appearance , even to the mirror .
2013年11月7日星期四
The belt caused by high energy
Belt drive, including the belt, the belt belt housing accommodating the motor , the motor housing accommodating the motor , the handle , the driving wheel , a driven wheel and a driving wheel connected to said motor and transmission device , the motor housing integrally Sanding Sheets connected with the handle to form a unit body , a connecting device is connected to the unit body shell belt , said belt unit body can be rotated about its axis of rotation , easy belt machine is located in a comfortable operating position , reducing operator length time work fatigue.
Belt grinding wheel in addition to the same sliding friction , plowing and cutting action , there abrasive effect on the surface of the extrusion , and to the plastic deformation , chilled surface layer changes and tear, and because of friction the contact point temperature, flow , etc. caused by the combined effects of thermoplastic so , from cutting and grinding disc this point of view, but also has grinding belt grinding , grinding and polishing of multiple role and this is what the surface of belt grinding good quality reasons .
The presence of nano- phenolic resin , the dehydration of the drying stage belt titania dispersed in the phenolic resin , phenolic resin and the phenolic hydroxyl group of the substrate can be curved around the hydroxyl group is formed by an interpenetrating network of titanium alloy , so that the adhesive layer adhesive strength , toughness , heat resistance and seizing resistance is also greatly improved , improved abrasive belt grinding capacity and service life . abrasive belt grinding equipment belt grinding equipment in various forms in various forms , wide variety. its in cut off wheel a variety of general-purpose device for belt grinding . universal belt grinding devices have small portable belt drive, all-around belt drive, desktop belt machine ; big a cylindrical abrasive belt grinding machine , flat belt grinder , centerless grinding machines and abrasive belt grinding machine inner circle , etc. there are special camshaft belt grinding profile grinding belt , industrial belt polishing mill tanks , automobile tire rims face belt throwing mill, motorcycle tank belt throwing mill, special stainless steel sinks hair machines.
Belt grinding wheel in addition to the same sliding friction , plowing and cutting action , there abrasive effect on the surface of the extrusion , and to the plastic deformation , chilled surface layer changes and tear, and because of friction the contact point temperature, flow , etc. caused by the combined effects of thermoplastic so , from cutting and grinding disc this point of view, but also has grinding belt grinding , grinding and polishing of multiple role and this is what the surface of belt grinding good quality reasons .
The presence of nano- phenolic resin , the dehydration of the drying stage belt titania dispersed in the phenolic resin , phenolic resin and the phenolic hydroxyl group of the substrate can be curved around the hydroxyl group is formed by an interpenetrating network of titanium alloy , so that the adhesive layer adhesive strength , toughness , heat resistance and seizing resistance is also greatly improved , improved abrasive belt grinding capacity and service life . abrasive belt grinding equipment belt grinding equipment in various forms in various forms , wide variety. its in cut off wheel a variety of general-purpose device for belt grinding . universal belt grinding devices have small portable belt drive, all-around belt drive, desktop belt machine ; big a cylindrical abrasive belt grinding machine , flat belt grinder , centerless grinding machines and abrasive belt grinding machine inner circle , etc. there are special camshaft belt grinding profile grinding belt , industrial belt polishing mill tanks , automobile tire rims face belt throwing mill, motorcycle tank belt throwing mill, special stainless steel sinks hair machines.
2013年11月2日星期六
Diamond main reason for tool wear
When the other parameters constant, the corresponding cutting depth of each there is an optimal wheel speed; when the cutting depth and the wheel speed is constant, there is an optimal feed rate; various process parameters on the wheel radial wear of the primary and secondary effects order: wheel speed - cutting depth - feed speed. Tool wear and grinding wheel machining process parameters and the coordination between process parameters have a great relationship, it is necessary to optimize the process parameters. ZJ Pei analyzed the situation when grinding wafers, the following conclusions: its combination of high strength, good formability, high temperature, thermal conductivity and good wear resistance, long life, can withstand greater loads. Wheel during the sintering process because there is inevitably shrinkage and deformation, so the use of the grinding wheel before shaping, it is difficult wheel dressing. When the grinding force reaches a certain value abrasive broken; when the wheel speed is 2175rpm, chuck speed of 40rpm, the wheel broken abrasive paper sheet at the grinding force is small. Therefore, the grinding force is substantially constant and high wear rates. A diamond or cubic boron nitride (CBN) abrasive grinding wheel production, because of its excellent grinding performance, have been widely used in various fields of grinding. Diamond grinding wheel is grinding carbide, glass, ceramics, precious stones high brittle material effects tools.
(3) Work material
Currently within the electroplated diamond dressing roller manufacturing method is to create sophisticated wheel-shaped face most effective way to set precision manufacturing technology, precision cut off disc electroforming technology, precision measurement technology as a whole. This article describes the inner electroplated diamond wheel manufacturing and development. In recent years, with high-speed grinding and ultra-precision grinding technology, the rapid development of the wheel put forward higher requirements, ceramics and resin bonded grinding wheels can not meet the needs of production, because of its metal-bonded grinding wheel bond strength high, forming a good, long life and other significant characteristics of the production has been widely used.
(3) Work material
Currently within the electroplated diamond dressing roller manufacturing method is to create sophisticated wheel-shaped face most effective way to set precision manufacturing technology, precision cut off disc electroforming technology, precision measurement technology as a whole. This article describes the inner electroplated diamond wheel manufacturing and development. In recent years, with high-speed grinding and ultra-precision grinding technology, the rapid development of the wheel put forward higher requirements, ceramics and resin bonded grinding wheels can not meet the needs of production, because of its metal-bonded grinding wheel bond strength high, forming a good, long life and other significant characteristics of the production has been widely used.
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