Nd dies: Wire drawing industry management
In any wire drawing business, ‘Wire Drawing Dies’ are concise red to be crucial components. There will be required quality \dies to produce superior quality wires at the lowest wire die cost/ton drawn. Remember, improper selection combined with poor die quality will only add direct and indirect die cost. This is \through wire rejections resulting from poor accuracy, surface finish as well as subsequent production loss. Die and wire making are stated to be partnership for excellence. Due and proper attention needs to be paid to achieve this strategic partnership to ensure excellent die management in almost every wire industry.
To produce dies for drawing wire there are available different types of materials. It includes synthetic diamond, natural diamond and TC (Tungsten Carbide).Each one is known to have own application sphere. Every wire is partially or fully drawn using TC dies. This because the latter exhibits the given below qualities.
- At room temperatures, it shows high hardness. There are encountered high temperatures in drawing operations.
- A cost effective option among all three materials.
- Smaller thermal coefficient expansion. Hence, die size variation caused by increasing working temperatures is stated to be minimal.
- High resistance is noticed against deformation especially when in load.
- Its property allows it to receive as well as maintain very high surface finish to about 1 micro inch.
Powder metallurgy process is used to manufacture TC dies/ diamond drawing dies pellets/nibs using basic raw material like Tungsten Carbide. Metallic binder Cobalt is also used. There will be essential a nib that is tough and hard-to-wear resistance for drawing operations. This way, it can easily resist deformation especially under load.
Toughness and hardness of any material is stated to be inversely proportional. Hence, the two properties are to be used in optimum combination according to the desired application. Hence, to serve this particular purpose, there are available TC nibs in different grades
TC of different grades tends to have hardness ranging from 1400-2000 on the HV-30 scale. Its corresponding transverse-rupture strength is around 1700-2800 N/mm square. These are manufactured nowadays to promote drawing operations. Different grades can be obtained by diversifying TC and cobalt percentage in grain size. Reducing cobalt content and grain size can help increase material hardness. ND Drawing Dies can be a better selection.
Proper nib grade selection is possibly only after discussing with the leading die manufacturer. It is rather termed as the initial step to take to buy a good quality die. Selection of the grade entirely is based on the wire drawn material and size including that of machinery condition. For small wire sizes, there are used harder grades with rigid machinery. On the other hand, for bar drawing, large diameter wires, and in places where there can be encountered impact loading or vibrations, there are used tougher grades. TC pellet production is in now in trial basis to derive enhanced surface hardness and core toughness. Nd dies do make excellent purchase.