How to choose the right grinding wheel hardness?
How to choose the right grinding wheel hardness?
Hardness refers to the difficulty of the abrasive wheel falling off under the action of external force.
In order to meet the requirements of different workpiece material grinding,
Hardness selection
The following grinding wheel hardness selection principles are for reference:
a. When grinding soft materials, choose a harder grinding wheel. When grinding hard materials, choose a soft grinding wheel.
b. When grinding soft and tough non-ferrous metals, the hardness should be selected to be softer;
c. Grinding materials with poor thermal conductivity should be selected as softer grinding wheels;
d. When the end face grinding is more than the circumferential grinding, the hardness of the grinding wheel should be softer;
e. Under the same grinding conditions, the hardness of the resin bond grinding wheel is higher than that of the ceramic bond grinding wheel.
f. When the grinding wheel rotates at a high speed, the hardness of the grinding wheel can be soft.
g. Grinding with coolant is higher than the grinding wheel when dry grinding
It depends mainly on the material of the workpiece being ground, the grinding efficiency and the quality of the machined surface.
Divided into different hardness levels when manufacturing the grinding wheel
The grinding wheel is selected too hard, the blunt abrasive grains are not easy to fall off, the grinding wheel is easy to block, the grinding heat is increased, the workpiece is easy to burn, the grinding efficiency is low, and the surface quality of the workpiece is affected;
The grinding wheel is too soft, and the abrasive particles fall off when they are sharp, which increases the loss of the grinding wheel, easily loses the correct geometry and affects the accuracy of the workpiece.
Therefore, the choice of the hardness of the grinding wheel should be appropriate, and should also be based on the contact area between the grinding wheel and the workpiece, the shape of the workpiece, the way of grinding, the cooling method,
Factors such as the type of bonding agent of the grinding wheel are considered together.
Hardness refers to the difficulty of the abrasive wheel falling off under the action of external force.
In order to meet the requirements of different workpiece material grinding,
Hardness selection
The following grinding wheel hardness selection principles are for reference:
a. When grinding soft materials, choose a harder grinding wheel. When grinding hard materials, choose a soft grinding wheel.
b. When grinding soft and tough non-ferrous metals, the hardness should be selected to be softer;
c. Grinding materials with poor thermal conductivity should be selected as softer grinding wheels;
d. When the end face grinding is more than the circumferential grinding, the hardness of the grinding wheel should be softer;
e. Under the same grinding conditions, the hardness of the resin bond grinding wheel is higher than that of the ceramic bond grinding wheel.
f. When the grinding wheel rotates at a high speed, the hardness of the grinding wheel can be soft.
g. Grinding with coolant is higher than the grinding wheel when dry grinding
It depends mainly on the material of the workpiece being ground, the grinding efficiency and the quality of the machined surface.
Divided into different hardness levels when manufacturing the grinding wheel
The grinding wheel is selected too hard, the blunt abrasive grains are not easy to fall off, the grinding wheel is easy to block, the grinding heat is increased, the workpiece is easy to burn, the grinding efficiency is low, and the surface quality of the workpiece is affected;
The grinding wheel is too soft, and the abrasive particles fall off when they are sharp, which increases the loss of the grinding wheel, easily loses the correct geometry and affects the accuracy of the workpiece.
Therefore, the choice of the hardness of the grinding wheel should be appropriate, and should also be based on the contact area between the grinding wheel and the workpiece, the shape of the workpiece, the way of grinding, the cooling method,
Factors such as the type of bonding agent of the grinding wheel are considered together.
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