|Grinding wheel for internal round grinding machines.|
grinding wheels centerless cylindrical internal surface gear valve cam crank shaft grinding technology
Internal grinding refers to the grinding of bores or holes and probably one of the most difficult type of grinding. Requirements of internal grinding range from very rapid removal of stock to processes capable of generating size and concentricity measured in millionths of inchs. Proper selection of the right grinding wheel is therefore very important.
The work pieces can be fixed horizontally or vertically, depending on the used grinding machine.
The purpose of the dressing and truing is to restore the original cutting geometry and to correct the flatness and roundness of the grinding wheel. This is done in many cases by diamond dressers.
Grinding machines can be equipped with different grinding wheels. The grinding wheels can consist of aluminium oxide Al2O3, cubic boron nitride cBN or diamond. cBN and diamond grinding wheels are very hard and can be used for high precision grinding of very hard parts. The life time is very high. Diamond wheels have some limitation for grinding steel because of the solubility of carbon in iron.
The grain size of the abrasive material of a grinding wheel is determined by the mesh size of the sieve that is used for the selection of the material. The mesh size is therefore a measure of the roughness of the grinding wheel and determines the removal rate and the surface roughness of the workpiece after grinding.
|rough||medium||fine||very fine||ultra fine|
|10 12 14
16 20 24
|30 36 46
|70 80 90 100
120 150 180 220
|240 280 320 400
500 600 700 800
|1000 1200 1500 2000
2500 3000 4000 6000
Bonding of the abrasiv material can be vitrified, metallic or resin. Vitrified bonding is used frequently. High stock removal rates can be achieved and the rigidity allows high precision grinding. This bonding is not sensitive to water, acid, oil and it is not temperature sensitive either. Resin bonding is rather soft and is used to achieve very smooth surfaces. Metallic bonding is used for special purposes, e.g. for electrical discharge truing. Regulation and feed wheels use rubber bonding.
|very soft||soft||medium||hard||very hard|
|D E F G||H I J K||L M N O||P Q R S||T U V W X Y Z|
We can offer to you various types of grinding wheels from Kinik, Taiwan. Kinik is a large grinding wheel manufacturer with very good reputation. Please give us your grinding wheel specs so that we can work out a proposal for you.
|Crystec Technology Trading GmbH will be pleased to further discuss details with you.|
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