PCD tools, also known as polycrystalline diamond inserts, are made by calcining natural or artificial diamond powder and binders in a certain proportion under high pressure and high temperature to form PCD composite sheets with fixed apertures and thicknesses. Then, they are made into PCD milling cutters through cutting, welding, grinding and other processing techniques. They are widely used in aerospace, auto parts, 3C electronics and other fields. There are many kinds of cutting tools now, especially those that are very popular nowadays. Many companies will use other raw materials for mixed processing and production during production and processing, which greatly reduces the performance of PCD inserts. Therefore, how to distinguish PCD milling cutters.
PCD milling cutters are inserts made by welding PCD composite sheets (PCD bars) to carbide cutters or steel cutter bodies. The high hardness, wear resistance, low friction coefficient and strength of polycrystalline diamond are combined with the high bending strength of tungsten carbide tools. The tungsten carbide tool layer provides mechanical support for the diamond layer and enhances its bending strength. At the same time, the carbide tool layer is easy to weld and can be processed into various forms of PCD milling cutters.
How to Identify PCD End Mills
You can carefully observe the exposed corundum on the diamond head and observe its concentration distribution. The content of corundum is too little and evenly distributed. Secondly, look at the connection of the PCD blade. It can be started from two aspects. Observe whether the welding is complete and neat, the welding is continuous, and the edge of the knife is not vertical to the substrate sink, which affects chip removal and heat dissipation and can cause the knife to fall off. Secondly, observe whether the diamond knife and the substrate are level and uneven, which can cause the plate to collapse and even the knife to fall off.
Observe whether the welding and the substrate are tightly welded. There will be a weld line between the insert and the substrate after brazing. If the arc surface at the bottom of the insert is completely integrated with the substrate, there will be no cracks. Cracks indicate that the insert on the PCD insert is not completely integrated with the substrate. The root cause is uneven grinding of the arc surface at the bottom of the insert.
Accurately measuring the weight of the insert is a key step. For PCD inserts, the heavier the weight, the higher the thickness and density. This is important in the cutting process because heavier inserts can withstand greater forces during processing, making the cutting process more stable and smooth.
