Due to intense friction, leaving a high grinding zone temperature. This can cause stress and deformation of the workpiece, and even cause surface burns. It is necessary to inject a lot of grinding coolant to reduce the grinding temperature. Coolant also played Chip and lubrication.
Grinding large radial force. This causes the machine - Flexible concessions workpiece system, so that the actual depth of cut is less than nominal depth of cut - wheel. Therefore grinding will be complete, we should not feed light grinding to eliminate errors.
Abrasive blunt, the grinding force also increased, resulting in grains or broken off, again exposing the sharp edge, this feature is called "self-sharpening." Self-sharpening, the grinding can be normal within a certain time conduct, but work more than a certain time, give artificial trimmed, so the grinding force increases caused by vibration, noise and damage the workpiece surface quality.
Since the metal cutting wheels itself has high hardness and heat resistance, and therefore the grinding can be processed high hardness materials such as hardened steel, carbide.
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2015年6月30日星期二
2015年6月27日星期六
A wide range of wheel:
Press the abrasive can be divided into ordinary abrasive (corundum and silicon carbide, etc.) and natural abrasive grinding wheels and superabrasive (diamond and cubic boron nitride) grinding wheel;
According to the shape can be divided into flat-shaped grinding wheel, bevel wheel, cylindrical grinding wheel, tile granite cutting wheels, disc wheel and so on; by binding agent can be divided into pottery wheel, resin wheel, rubber wheel, metal grinding wheel. The main parameters metal cut off wheels, viscosity, hardness, binding agents, shape, size and the like.
Since the wheel typically operate at high speed, before turning test should be carried out so that the use of (guaranteed at the maximum operating speed of the wheel, do not break) and static balance test (when working to prevent vibrations caused by the machine). Grindstone at work for some time, it should be trimmed in order to restore the grinding performance and correct geometry.
According to the shape can be divided into flat-shaped grinding wheel, bevel wheel, cylindrical grinding wheel, tile granite cutting wheels, disc wheel and so on; by binding agent can be divided into pottery wheel, resin wheel, rubber wheel, metal grinding wheel. The main parameters metal cut off wheels, viscosity, hardness, binding agents, shape, size and the like.
Since the wheel typically operate at high speed, before turning test should be carried out so that the use of (guaranteed at the maximum operating speed of the wheel, do not break) and static balance test (when working to prevent vibrations caused by the machine). Grindstone at work for some time, it should be trimmed in order to restore the grinding performance and correct geometry.
2015年6月23日星期二
Wheel of life
In the grinding process, with the wheel itself wear, wheel face state is changing. The longer the time, the lower the cutting ability of the grinding wheel, a variety of grinding defects will continue to emerge, the grinding not up to standard. Then it must trim grinding wheels to reach normal state. We usually refer to is the actual grinding wheel life time in two trim wheel between. Wheel length of life directly affects the grinding effects, especially more important for profile grinding.
2015年6月19日星期五
Install the wheel on the grinder should?
Wheel is working at high speed, then fly or easily spill caused no casualties. So be especially careful before using checks, does not allow cracks. The installation must be reliable, and to go through static balance adjustment, so it will not cause injury.
Between the wheel and the wheel shaft or bore cylindrical flange, not too tight, otherwise the grinding thermal expansion, easy to wheel bursting, not too loose, otherwise prone to eccentric wheel, loss of balance, so as to cause vibration. Usually with the gap of 0.1 ~ 0.8mm, high speed grinding wheel gap to be smaller. When the wheel clamping flange with two flange diameter should be equal to the outer diameter shall be not less than 1/3 of the wheel diameter. Application of the end surface between the flange and the wheel cardboard or oil and rubber, and so do the pad, the pressure evenly distributed, the tightening force of the nut can not be too large, otherwise the wheel will break. Note the tightening screw rotation, and the wheel should spin in the opposite, that is, when the wheel is rotated counterclockwise, with right-hand thread, so that the diamond reinforced concrete in force, will drive the screw nut more tightly.
Between the wheel and the wheel shaft or bore cylindrical flange, not too tight, otherwise the grinding thermal expansion, easy to wheel bursting, not too loose, otherwise prone to eccentric wheel, loss of balance, so as to cause vibration. Usually with the gap of 0.1 ~ 0.8mm, high speed grinding wheel gap to be smaller. When the wheel clamping flange with two flange diameter should be equal to the outer diameter shall be not less than 1/3 of the wheel diameter. Application of the end surface between the flange and the wheel cardboard or oil and rubber, and so do the pad, the pressure evenly distributed, the tightening force of the nut can not be too large, otherwise the wheel will break. Note the tightening screw rotation, and the wheel should spin in the opposite, that is, when the wheel is rotated counterclockwise, with right-hand thread, so that the diamond reinforced concrete in force, will drive the screw nut more tightly.
2015年6月15日星期一
The introduction and use of the characteristics of the wheel
Wheel is binding agent with many small flange or corners mineral crystal particles cemented together to form. Wheel hardness than particles is grinding and cutting tools, but also the need to have sufficient strength and flexibility, we can resist the impact force generated by the grinding process. These particles are obtained after crushing abrasive.
The abrasive is made from natural and man-made abrasive abrasive material commonly used natural abrasive corundum, emery. Artificial Abrasive ordinary alumina, white alumina, black silicon carbide, green silicon carbide. The size of the abrasive particles called concrete cutting wheels size.
Grindstone at work due to the surface of the particles and the friction between the cutting tool, it will gradually wear blunt, when the grinding resistance beyond the adhesion between particles and a binder, the particles began to fall off, and was replaced by new sharp particles. So the wheel has a self-sharpening performance. But adhesion binding agent should not be too strong, too strong as particles after blunting also attached to the wheel surface grinding wheel will lose effect. Further, since the granite cutting disc and the workpiece is friction will have a lot of heat, the binding agent can easily be softened. By grinding the metal material at the end of the adhesive binder filled with sand in the cracks between the wheel stopper reality. If this plug solid wheel continues to work, not only relatively low efficiency, are causing annealing grinding and cutting tools also become blue. On the other hand if the binding agent is not firmly bonded particles in the particle has not been changed between the pure grinding but also will make it fall off, so wear faster transmission lines sand, easily deformed, require regular trimming.
The abrasive is made from natural and man-made abrasive abrasive material commonly used natural abrasive corundum, emery. Artificial Abrasive ordinary alumina, white alumina, black silicon carbide, green silicon carbide. The size of the abrasive particles called concrete cutting wheels size.
Grindstone at work due to the surface of the particles and the friction between the cutting tool, it will gradually wear blunt, when the grinding resistance beyond the adhesion between particles and a binder, the particles began to fall off, and was replaced by new sharp particles. So the wheel has a self-sharpening performance. But adhesion binding agent should not be too strong, too strong as particles after blunting also attached to the wheel surface grinding wheel will lose effect. Further, since the granite cutting disc and the workpiece is friction will have a lot of heat, the binding agent can easily be softened. By grinding the metal material at the end of the adhesive binder filled with sand in the cracks between the wheel stopper reality. If this plug solid wheel continues to work, not only relatively low efficiency, are causing annealing grinding and cutting tools also become blue. On the other hand if the binding agent is not firmly bonded particles in the particle has not been changed between the pure grinding but also will make it fall off, so wear faster transmission lines sand, easily deformed, require regular trimming.
2015年6月11日星期四
What is self-grind of the wheel
Since grind of the wheel are also known as "self-sharpening."
Grinding wheel action depends mainly on grains exposed sharp edges, during grinding, sharp edges will gradually be worn and blunted, weakened capacity stainless steel cutting wheels.
Then peel off the surface of the grains or broken, thereby forming a new blade grinding, grinding in order to achieve the effect of a sharp, which is self-sharpening.
Sparks generated during grinding is grinding down a portion of another part of the metal debris is broken off or sand.
If the spark is short, it is bound to self-sharpening poor, a reduced ability to grinding, small metal shavings mill under a sand can not afford to, so little spark and short.
Grinding wheel action depends mainly on grains exposed sharp edges, during grinding, sharp edges will gradually be worn and blunted, weakened capacity stainless steel cutting wheels.
Then peel off the surface of the grains or broken, thereby forming a new blade grinding, grinding in order to achieve the effect of a sharp, which is self-sharpening.
Sparks generated during grinding is grinding down a portion of another part of the metal debris is broken off or sand.
If the spark is short, it is bound to self-sharpening poor, a reduced ability to grinding, small metal shavings mill under a sand can not afford to, so little spark and short.
2015年6月7日星期日
Pottery wheel performance
Ceramic grinding wheel is a cutting tool, which consists of many small and hard, abrasive and adhesive binders from the porous body. Abrasive cutting directly responsible for the work, sharp and must have a high hardness, heat resistance and a certain 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. Type silicon carbide abrasive hardness higher, sharper, good thermal conductivity, but more brittle, suitable for grinding cast iron and tungsten carbide.
For the same abrasive grinding wheel, because of its different thickness, surface roughness and processing efficiency is not the same after the workpiece, coarse grains for rough grinding, fine abrasive grains, the more rough abrasive grain size number smaller.
Binding agents from bonded abrasive effect. Commonly used ceramic binders, followed by the resin binder. Different binders choice of materials, the impact wheel corrosion resistance, strength, heat resistance and toughness.
The more firmly bonded abrasive particles, the more difficult to fall from the wheel, the hardness of the wheel is said that the hardness of the wheel is the degree of difficulty of the stainless steel cutting wheel surface under loads off. Easy to fall off called soft, otherwise known as hard. The abrasive grinding wheel hardness and hardness are two different concepts. Surface grinding of the workpiece is relatively soft, abrasive cutting edge (corner) on easy to wear, this time may be longer use abrasive, that some of the firm bonding optional wheels (high hardness of the wheel). Conversely, a low hardness grinding wheel for high hardness workpiece.
Ceramic wheel at high speed work, in order to ensure safety, should be checked before installation, there should be no cracks and other defects; in order to make the wheel steady, balancing test should be carried out before use.
concrete cutting blade after working a certain time, the surface voids are clogged debris, abrasive acute angle blunt, the original geometry will be distorted. It must be trimmed in order to restore the cutting ability and the correct geometry. Required diamond grinding wheel dressing pen.
For the same abrasive grinding wheel, because of its different thickness, surface roughness and processing efficiency is not the same after the workpiece, coarse grains for rough grinding, fine abrasive grains, the more rough abrasive grain size number smaller.
Binding agents from bonded abrasive effect. Commonly used ceramic binders, followed by the resin binder. Different binders choice of materials, the impact wheel corrosion resistance, strength, heat resistance and toughness.
The more firmly bonded abrasive particles, the more difficult to fall from the wheel, the hardness of the wheel is said that the hardness of the wheel is the degree of difficulty of the stainless steel cutting wheel surface under loads off. Easy to fall off called soft, otherwise known as hard. The abrasive grinding wheel hardness and hardness are two different concepts. Surface grinding of the workpiece is relatively soft, abrasive cutting edge (corner) on easy to wear, this time may be longer use abrasive, that some of the firm bonding optional wheels (high hardness of the wheel). Conversely, a low hardness grinding wheel for high hardness workpiece.
Ceramic wheel at high speed work, in order to ensure safety, should be checked before installation, there should be no cracks and other defects; in order to make the wheel steady, balancing test should be carried out before use.
concrete cutting blade after working a certain time, the surface voids are clogged debris, abrasive acute angle blunt, the original geometry will be distorted. It must be trimmed in order to restore the cutting ability and the correct geometry. Required diamond grinding wheel dressing pen.
2015年6月3日星期三
How to Install Ceramic wheel
Due to the high speed of pottery wheel, grinding wheel and more brittle, damaged and may occasionally result in serious consequences, therefore, whether the wheel is installed properly reasonable, safe and reliable, it is very important. Wheel of installation must be carried out carefully to ensure production safety grinding.
Ceramic wheel installation should pay attention to the following safety technology issues.
① aperture wheel should be freely attached to the concrete cutting wheels spindle or wheel chucks, and remain in compliance with the clearance aperture crude refining on the technical requirements.
Wheel pore size is too large, allowing the use of the liner shrinkage. Bush width smaller than the width of the wheel, but not less than 1/2 the thickness. Wheel chuck diameter of not less than 1/3 the diameter of the wheel, the wheel in order to ensure there is enough power and torque.
Wheel chuck have sufficient rigidity, after pressing the sides to maintain contact with the wheel flat and uniform, must be pressed between the pad surface with a flexible gasket (asbestos rubber sheet) and a thickness of 1 ~ 2mm, a diameter greater than card disc diameter 2mm appropriate. To ensure that the contact surface between energy compaction, compaction, should be kept clean and free of attachments.
When ② installation woodworking saw blade, should pay attention to controlling the compression nut or screw tightness, it is necessary to ensure when the grinding wheel does not slip, but also to prevent excessive pressure, resulting in wheel damage, therefore, it is best to use a torque wrench. If multiple time compression screw shall diagonal order, gradually tightening; wheel and chuck the total weight exceeds 16kg, it should be mounted on a grinder lifting methods and collision avoidance; install the new wheel to check to make sure safe only after the test, all the normal sounds and operation, etc., that can be put into production.
Ceramic wheel installation should pay attention to the following safety technology issues.
① aperture wheel should be freely attached to the concrete cutting wheels spindle or wheel chucks, and remain in compliance with the clearance aperture crude refining on the technical requirements.
Wheel pore size is too large, allowing the use of the liner shrinkage. Bush width smaller than the width of the wheel, but not less than 1/2 the thickness. Wheel chuck diameter of not less than 1/3 the diameter of the wheel, the wheel in order to ensure there is enough power and torque.
Wheel chuck have sufficient rigidity, after pressing the sides to maintain contact with the wheel flat and uniform, must be pressed between the pad surface with a flexible gasket (asbestos rubber sheet) and a thickness of 1 ~ 2mm, a diameter greater than card disc diameter 2mm appropriate. To ensure that the contact surface between energy compaction, compaction, should be kept clean and free of attachments.
When ② installation woodworking saw blade, should pay attention to controlling the compression nut or screw tightness, it is necessary to ensure when the grinding wheel does not slip, but also to prevent excessive pressure, resulting in wheel damage, therefore, it is best to use a torque wrench. If multiple time compression screw shall diagonal order, gradually tightening; wheel and chuck the total weight exceeds 16kg, it should be mounted on a grinder lifting methods and collision avoidance; install the new wheel to check to make sure safe only after the test, all the normal sounds and operation, etc., that can be put into production.
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