The wire drawing die refers to the tool that forces the metal to pass through the die under the action of external force during the metal pressure processing, the metal cross-sectional area is compressed, and the required cross-sectional area shape and size are obtained.baike.baidu
Polycrystalline diamond (PCD) is a synthetic material invented by two Swedish researchers in 1953.
This wire drawing die is made of synthetic diamond single crystal, plus a small amount of silicon, titanium and other binders, and is polymerized under high temperature and high pressure conditions, can be used for ferrous and non-ferrous wire drawing applications.
PCD drawing dies allow us to cover a wide range of die diameters, from 0.010mm to 26mm, as well as shape dies (triangle, square, rectangle, oval, other shapes to drawing…) for making profiled wires, bars and pipes.
Cobalt-based PCD wire drawing die core contains metal binder, which has good machinability and can be processed by EDM, laser, ultrasonic and other processes.
However, the presence of metallic cobalt makes diamond prone to graphitization at high temperatures, so PCD cores are suitable for processing and use at temperatures below 650 degrees Celsius.
Silicon-based PCD wire drawing die cores are relatively poor in processability, and we generally use them to draw large diameter wires.
However, there is no metal binder in the material, so the material can still maintain good thermal stability at 1000 degrees Celsius.
PCD wire drawing die VS carbide wire drawing die
PCD wire drawing die is mainly used for drawing thin wire, while drawing steel wire (steel wire) generally adopts carbide wire drawing die.
When drawing copper wires of the same diameter, the service life of the PCD wire drawing die is 300 to 500 times that of the cemented carbide wire drawing die. When drawing nickel wire, it is 80 to 100 times. When drawing molybdenum wire, the life of PCD wire drawing die is 50 to 80 times that of cemented carbide wire drawing die. When drawing carbon steel, the life of PCD drawing die is 20 to 60 times that of cemented carbide drawing die.
PCD wire drawing dies VS natural diamond dies
Drawing stainless steel wire with PCD (Polycrystalline Diamond) drawing die has achieved success in Britain in 2001.
The production comparison of PCD wire drawing dies and natural diamond dies under the same geometrical dimensions shows that PDC dies can produce 1000Kg per die after each repair, while natural diamond dies can only produce 200Kg each. PDC molds can be repaired 10-11 times, while natural diamond molds can only be repaired 5-6 times, so the output of a POC mold is more than 10 times higher than that of natural diamond molds.
PCD Drawing Die Advantages
- High wire drawing life
- Ideal for long-term production runs
- Low tolerance and high finish wire surface
- Tailored to wire requirements
- The hole diameter changes very little per unit time, and the size of the drawn wire changes little, which is very beneficial to the winding of the reel.
- More cost-effective