High-precision wire used in various industries, such as electronic devices, radar, television, instrumentation and aerospace, as well as commonly used tungsten wire, molybdenum wire, stainless steel wire, wire and cable wire and various alloy wires are polycrystalline shaped The mold is drawn out, and the polycrystalline shaped mold has strong wear resistance and high service life due to the use of natural diamond as raw material.
In metal press processing. A tool that forces a metal through a mold under an external force, a metal cross-sectional area is compressed, and a desired cross-sectional area shape and size is obtained, which is called a wire drawing die. The drawing die is a wire that passes through a mold to make it from the coarse to the fine, and gradually reaches the size required by people. This special mold is a polycrystalline shaped die. The core of the polycrystalline shaped mold is generally made of natural diamond, synthetic diamond polycrystal (PCD, CD composite, etc.). The copper wire drawing die belongs to a soft wire drawing die. There are also hard wire drawing dies, such as pulling tungsten wire. The angle of the compression zone of the copper wire drawing die is generally 16-18 degrees, the sizing length is 30-40%, and the angle of the compression zone of the tungsten wire drawing die is relatively small, generally 12-14 degrees, and the length of the cutting line is 60-70. %.