Polycrystalline Diamond Tool Cutting Process

Because PCD composite sheet has high hardness and wear resistance, special processing technology must be adopted. The processing of PCD composite sheets mainly adopts several process methods such as wire EDM, laser processing, ultrasonic processing, and high-pressure water jet.

Among the above-mentioned processing methods, the effect of EDM is better. The existence of the bonding bridge in PCD makes it possible for EDM composite sheets. In the presence of working fluid, the pulse voltage is used to make the working fluid near the electrode metal form a discharge channel, and a discharge spark is generated locally. The instant high temperature can melt and fall off the polycrystalline diamond, thereby forming the required triangle, rectangle or Square cutter head blank. The efficiency and surface quality of the EDM PCD composite sheet are affected by factors such as cutting speed, PCD particle size, layer thickness and electrode quality. The reasonable choice of cutting speed is very important. Experiments show that increasing the cutting speed will reduce the quality of the processed surface. However, if the cutting speed is too low, it will produce the phenomenon of "spinning" and reduce the cutting efficiency. Increasing the thickness of the PCD blade will also reduce the cutting speed.