In the drawing of metal products industry, wire drawing die is very important. Consumable tool drawing die material selection of drawing die quality plays a key role.The physical and chemical characteristics of drawing die must satisfy high hardness, impact resistance, wear resistance, low friction coefficient, which directly affect the quality of wire rod the quality of life of dies to the influence of the length of wire drawing production and production efficiency. Therefore to improve the quality of wire drawing die prolong the life, is the domestic and foreign scholars continue to study. The quality and life of die and material, pass design, manufacturing process, tooling equipment and testing instrument and so on.

Currently on the market are mainly cemented carbide drawing die mold,mold and die. Polycrystalline CVD diamond carbide drawing die life is lower than the norm and CVD polycrystalline diamond die,but its cost is relatively low, so it is widely used in the wire drawing dies,especially suitable for drawing with larger diameter (more than 8mm) of the wire or section.

Carbide drawing die mold core is generally made from tungsten carbide as raw materials, with a certain amount of cobalt binder for sintering.The tensile strength and hardness of the cobalt binder are very low, so, in the production of wire drawing, wire and die in the air on the contact surface of adhesive wear and abrasive wear to affect the service life of drawing die the easy to produce.

It is worth noting that the drawing die in the use process is easy to produce ring groove wear, wear marks, weld damage, different shaft wear, grinding and violent mode.

In recent years, with the chemical vapor deposition of diamond thin film technology, considering the cost of the mold and the use effect, a more reasonable approach is in the cemented carbide drawing die hole surface coated with a layer of uniform and adhesion of diamond films can meet the use requirements. There is also research workers from the structural change of drawing die. In order to improve the drawing die noodles, such as rotary drawing die, detachable assembly mode.

In general,drawing die material selection should consider drawing die material and the drawing material goods,to ensure that the goods have been based more on the surface gloss,the best to ensure the life of drawing die; and the wear resistance of the two is not particularly big difference, so you can avoid the excessive wear the product,or make the effectiveness of drawing die damaged or scrapped; at the same time we also should consider economic factors, in ensuring the normal production of the premise, so to maximize the interests and make the lowest cost.

Posted by: hannahgwendolyn at 09:43 AM | No Comments | Add Comment
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