Why Is Your Wire Drawing Die So Badly Worn
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Why Is Your Wire Drawing Die So Badly Worn
The service life of the wire drawing die will not only affect the production cost but also affect the stability of product quality and production efficiency. Understanding the damage caused and its manifestation of drawing die can effectively prolong its service life.
Three situations
There are three main forms of drawing die-hole damage.
- Rough Surface
The deformation heat generated by the drawing die leads to the temperature rise of the die, local oxidation color, and slight wear. Poor lubrication leads to spot welding between steel wire and dies hole surface, tungsten carbide particles loss, displacement to form scratches and ripples, working cone and sizing belt surface rough, causing large wear.
- Oval
Hard alloy hardness is uneven, drawing direction and die hole axis do not coincide, die hole single side of the force is too large, resulting in an ellipse.
- Annular Groove
It is typical fatigue wear. In the working process, the mould hole bears the impact of wire material so that tungsten carbide particles lose off, and the formation of a rough surface. The metal shavings scraped off the surface of the wire make the lubrication condition worse. The increased wear rate eventually leads to the formation of a circular groove in the area of the die hole that bears the maximum impact force.
Damage to the drawing tool is a normal part of the process and can be repaired. Therefore, more worthy of our attention is the following five factors affecting the service life of the drawing die, so as to reduce the damage degree of the drawing dies.
Five factors
- The Production Materials
The performance of various mold materials in terms of hardness, corrosion resistance, wear resistance, fracture resistance, plastic deformation resistance, cold and hot fatigue resistance, etc. are very different, so the mold material should meet the specific conditions for the use of wire drawing dies, otherwise, it will inevitably cause the early failure of the mold.
- The Hole Structure
After a series of improvements, the service life of the linear drawing die is 3-4 times higher than that of the arc drawing die, and it is especially suitable for high-speed drawing.
- Production Process
During the manufacturing process of wire, drawing dies, multiple processes such as forging, machining, and heat treatment are required. If the manufacturing process is unreasonable, the performance of the mold may be reduced, structural defects are formed, and the hidden dangers of early mold failure are generated.
- Working Conditions
The processed materials with different thicknesses and different materials have a great influence on the service life of the drawing die. The greater the strength and thickness of the processed material, the greater the force the mold needs to withstand, and its service life is relatively low. If the processed material and the mold material have a greater affinity, there may be adhesion and wear with the mold during the molding process, resulting in a reduction in the service life of the mold.
- Reasonable Use and Maintenance
The drawing mold should be reasonably used to maintain good performance and improve the repair level of the die, which is an important way to extend the service life of the die. In addition, good lubrication can effectively reduce friction and friction heat.
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