Diamond and cubic boron nitride (CBN) are considered to be the hardest known grinding materials and are therefore often referred to as “super-abrasives”. For this reason they are suitable for machining materials which are difficult or even impossible to grind with conventional abrasives such as silicon carbide or corundum. Diamond and CBN have the same crystal structure, with diamond consisting of pure carbon, whilst CBN is made up of the elements boron and nitrogen.
While diamond is available as natural grain as well as synthetically produced, CBN originates exclusively from synthesis.
Bonded precision grinding tools in
Diamond and CBN
Resin-bonded grinding tools have an excellent cutting capacity and a cool cut, designed for use in a wide variety of applications both with Diamond and in CBN. Certain bonds can also be used for dry grinding.
Due to their superb grit retention power, metal-bonded grinding tools have an excellent stability of shape – a decisive point when grinding profiles, for instance.
The ability of leaking off grinding heat much better makes these bond systems the ideal choice for flute grinding (mills, drills, etc.), with enhanced productivity
They differ from classic vitrified bonds only in their manufacturing process. Classic vitrified bonds are “pressure-free sintered“, i.e. stoved in the furnace without pressing. Similar to metal bonds, metal-vitrified bonds are pressed under high temperatures.
Typical applications for metal-vitrified bonds are internal grinding, cutting sapphire and oxide ceramic, honing tools and – for CBN – purling and flute grinding.
Vitrified bonds have an excellent dressing capacity, allowing these grinding tools to return to their originalshape easily once they lose their grinding rim geometry. This also allows for a reproducible dressing process capable of being automated, as a rule on the machine.
Electroplated precision grinding tools in Diamond and CBN
Electroplated tools differ from bonded tools (resin bond, metal/vitrified bond) in a number of essential aspects. As a rule, electroplated tools only have one grit layer.
- The grit layer is difficult to dress
- The concentration is very dense, it can be reduced only to a certain extent
- The individual grit is retained very well, and the grit free-stand is virtually perfect (cutting volume)
- Allowing highly complex profiles to be plated
- The wheel bodies can be recycled
Diamond and CBN grinding wheels for top & bottom grinding
Top and bottom grinding, also known as face grinding with planetary kinematics or fi ne honing, is most economical when machining large series.
Insights from more and more different applications lead to the further development of machines and grinding wheels – and therefore to constant process optimisation.
The method achieves excellent workpiece geometry in terms of height tolerance, parallelism and planarity.
DIAMETAL Abrasifs product are largely applied to these following field.
- Connection technology
- General mechanics
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