Polycrystalline diamond tool design principles

PCD granularity
PCD cutter size selection and processing conditions, such as design for finishing or super-finishing tool should be used in high strength, good toughness, good impact resistance, fine grain PCD. Coarse grain PCD tool can be used for general roughing.  cubic boron nitride particle size to the tool wear and breakage significantly influence the performance. Studies show that: PCD size number greater wear resistance tool stronger. DeBeers company SYNDITE 002 uses two kinds of PCD material and  Diamond blade  SiC composites tool machining the tool wear test results show that the particle size of 2μm SYNDITE002PCD material easily wear.
Blade thickness
Typically, PCD composite sheet thickness of about 0.3 ~ 1.0mm, carbide layer with a total thickness of about 2 ~ 8mm. PCD  synthetic diamond  thinner blade EDM favor. DeBeers company launched 0.3mm thick composite sheet PCD grinding force can be reduced to improve the EDM cutting speeds. PCD composite sheet material welding and cutting, carbide layer thickness can not be too small, the combination of the two materials in order to avoid stress difference between the surface and cause delamination.