Wire drawing die in the process of long-term use, the mold wall by metal wire intense friction and flushing action, would inevitably produce wear phenomenon, the most common is the workspace wire into LJ site in the annular groove tank (dent) pull mode ring groove, exacerbating the die wear and tear, because the ring groove on the peeling off by loose small particles by metal wire core materials into the die workspace and sizing area, abrasive role, while the wire into the die like grinding needle die wear.If not timely repair switch, then the ring groove will continue to accelerate expansion, increase the repair is difficult, even in the depth of the annular groove is, the avalanche crushed scrap wire drawing die completely.

Learn from experience, develop a set of standards, strengthen the daily maintenance, often for maintenance of wire drawing die is very economical. When diamond die is present any slight wear and tear, in a timely manner polishing, diamond die polishing to restore to the original state is spent time is shorter, and wire drawing die pass, no obvious change.

After decades of development, has the appearance of many new type wire drawing diesmaterials. According to the material types, drawing diescan be divided into alloy steel, cemented carbide die, natural diamond die, polycrystalline diamond die, CVD diamond mould and ceramic mould, etc. In recent years the development of new materials greatly enrich the application range of wire drawing die and improve the service life of drawing die.

(1) alloy die early wire drawing die manufacturing materials. Used in the manufacture of alloy steel mould materials are mainly carbon tool steel and alloy tool steel. But as a result of the alloy steel hardness and poor wear resistance and short service life, can not adapt to the need of modern production, so the carbide diessoon be eliminated, in the present production and processing has hardly see alloy steel.

(2)cemented carbidedies aremade from cemented carbide. Tungsten carbide belongs to cobalt alloy, its main composition is tungsten carbide and cobalt.Tungsten alloy is "skeleton", the main hard wear-resisting effect; Cobalt is bonding metal, is the source of metal toughness. Therefore, cemented carbide die compared with alloy steel mould has the following characteristics: high wear resistance, good polishing, small adhesion, low friction coefficient, low energy consumption, high corrosion resistance, these features make a wide variety of cemented carbide drawing die processing adaptability, become today's most used wire drawing die.

(3) natural diamond is carbon with straight body, use it to make the mold has the characteristic such as high hardness, good wear resistance. But the brittleness of natural diamond is bigger, more difficult to machining, commonly used in the manufacture of diameter of 1.2 mm below the drawing die. In addition, natural diamond is expensive, supply shortage, so the natural diamond die is not ultimately seeks both economic and practical tool for drawing.

Posted by: hannahgwendolyn at 09:25 AM | No Comments | Add Comment
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