Manufacturing of custom cold drawn special profiles
Cold drawing for versatile steel profiles
Cold drawing technology is a precision process that involves the plastic forming of steel. A tensile force pulls the material (usually a bar) through a die to obtain specific shapes and sizes. This technology is used for manufacturing items such as non-standard bars, round bars and flat bars, and for making custom-designed profiles. It is referred to as a “cold” process because the material is drawn at room temperature.
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Features and advantages of custom cold rolled profiles
Dimensional accuracy
Steel drawn products feature very tight dimensional tolerances and uniform shape and size along the entire length of the product (even several meters, which is impossible using other technologies).
Surface quality
Cold drawing produces smooth, uniform surfaces that are not as rough as when using other machining processes. In certain cases, roughness is comparable to grinding. In addition, the surface has a polished finish with no surface oxides.
Complex customized shapes
A wide range of cross-sections can be obtained, from simple shapes to complex customized shapes, even with sharp edges, in various sizes and lengths.
Better mechanical and metallurgical properties
Steel drawn profiles have better mechanical and metallurgical properties compared to products made using other processes. The reason for this is that it is exactly the cold-drawing process that leads to the hardening of the material by deformation (strain hardening). This means:
• Greater tensile strength
• Increased hardness
• Grain strengthening
For certain grades of steel (austenitic stainless steels) cold strain hardening is the only solution to increase their mechanical properties.
Reduction of waste and less loss of material
With drawing technology, products are not formed by removing material but by reducing the section of the bar and elongating it. This avoids wasting raw material.
Reduced machining time
If we consider the quality levels of the profiles supplied, additional surface machining is not required for many applications.
