In the metal wire drawing process, it is necessary to pass the metal wire through a mold to gradually reach the size required by people from thick to thin. This special mold is the wire drawing die.
There are many types of wire drawing die, including diamond wire drawing die, cemented carbide wire drawing die, plastic wire drawing die, etc. But no matter what kind of mold, its role is not to be underestimated. If the mold is properly maintained, it can maintain good operating performance, which directly affects the overall quality and efficiency of the drawing process. Therefore, how to maintain the drawing die has become an important issue that every enterprise has to face.
1. Reasonably install the drawing die
When installing the wire drawing die, ensure that the foundation is stable to avoid vibration and increase the wear of the die. At the same time, it is necessary to adjust the drawing axis of the wire to be symmetrical to the center line of the die hole, so that the stress between the wire and the die will be uniform and friction will be reduced.
2. The wire is drawn for pretreatment
Before the wire drawing process, the wire with more surface impurities needs to be cleaned, dried and then drawn; if the wire has more oxide scale on the surface, it can be pickled and dried first; and if the surface has peeling, Heavy leather and other phenomena can be repaired with a polisher before starting to pull.
We all know that the drawn wire must have good hardness uniformity, but what should we do if the wire hardness is too large or the hardness is uneven? In fact, it is very simple, heat treatment before processing, that is, reduce the hardness by annealing or tempering.
3. Maintain a suitable drawing surface shrinkage rate
In the wire drawing process, the shrinkage rate of the wire drawing surface is too large, which will cause the mold to crack or break. Therefore, we have to select the appropriate area shrinkage for drawing according to the different mechanical properties of the wire. For example, if you are drawing stainless steel wire with a diamond die, the single-pass surface shrinkage will generally not exceed 20%.
4. Use lubricants with excellent performance
The importance of lubricant to the wire drawing process is obvious. Its quality and sufficient supply affect the service life of the wire drawing die. In the field of wire drawing, vicafil® and steelskin® lubrication products have a good international reputation. The raw material control and production and control links of its products are extremely demanding, the quality is stable, the effect is excellent, and it has excellent lubricity, cooling and cleaning properties, and can form an undamaged film on the surface to reduce friction. Improve the service life of wire drawing die.
In addition to selecting the right lubricant, the condition of the lubricant should also be constantly observed during the use process. If there is discoloration or increase in powder, filter or replace lubricant in time to keep it in a smooth state.
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