The choice of PCD particle size is related to the machining conditions of the tool. For example, when designing the tool for finishing or superfinishing, PCD with high strength, good toughness, good impact resistance, and fine grain should be selected. Coarse grain PCD tools can be used for general rough machining. The particle size of PCD material has a significant effect on tool wear and breakage. The results show that the larger the particle size of PCD is, the stronger the wear resistance of the tool is.
The thickness of the blade
Generally, the thickness of the PCD composite sheet is about 0.3 ~ 1.0mm, and the total thickness after adding the cemented carbide layer is about 2 ~ 8mm. The thinner PCD layer thickness is beneficial to the edm of the blade. The thickness of the cemented carbide layer should not be too small when the PCD composite sheet is welded to the cutter body material, so as to avoid the layering caused by the stress difference between the two material bonding surfaces.