1. The compression ratio of the wire drawing process surface is too large, resulting in cracks or breakage of the die. Most of the cracks or fractures are caused by the release of internal stress. In any material structure, the existence of internal stress is inevitable. The internal stress generated when the wire is drawn can originally enhance the microcrystalline structure of the mold, but when the compression rate of the drawing surface is too large, it cannot be lubricated in time and the temperature rise will be too high. Part of the material on the surface of the mold is removed, and the stress on the microcrystalline structure is greatly increased, making it easier to crack or break.
2. The tensile axis of the wire rod is asymmetrical with the center line of the die hole, resulting in uneven stress on the wire rod and the wire drawing die, and the impact of mechanical vibration will also cause a high stress peak to the wire rod and the wire drawing die, both of which are Will accelerate the wear of the mold.
3. such as uneven hardness of the wire due to uneven annealing are likely to cause premature fatigue loss of the diamond wire drawing die, resulting in annular grooves to accelerate the wear of the die hole.
4. The surface of the wire is rough, and the surface adheres to the oxide layer, sand or other impurities, which will cause the mold to wear out too quickly. When the wire passes through the die hole, the hard and brittle oxide layer and other adhering impurities will cause the wire drawing die hole to quickly wear and scratch the surface of the wire like abrasive.
5. Poor lubrication or metal debris impurities in the lubricating fluid cause mold wear. Poor lubrication will cause the surface temperature of the die hole to rise too fast during wire drawing, and the die grains will fall off, resulting in die damage. When the lubricating fluid is not clean, especially the metal chips that fall off during drawing, it is very easy to scratch the surface of the die hole and the surface of the wire.
The above are some possible factors of die wear. For more industry knowledge, please visit our website: https://www.brwiremachine.com/
