Metal processing can take place using various techniques: some are very similar to each other, and often the advantages of specific applications are not known.
Knowing the differences between the many techniques should not be taken for granted.This article will take you to understand the difference between metal rolling and drawing.
What is metal drawing?
Cold drawing involves the plastic deformation of metals, capable of changing the shape of a material by inserting a smaller piece through a hole or cross-section matrix.
The metal drawing process is based on two fundamental principles: metal ductility and traction force. These two characteristics allow the material to stretch and deform inside the drawing machine until it reaches the required shape and cross-section.
Metal is drawn cold at ambient temperature, and hardened, thus improving its physical and mechanical properties. A drawn bar or wire has precise tolerances due to passing through calibrated matrices called dies (hard metal parts with a hole whose diameter is smaller than the metal's).
What is cold rolling?
Metal rolling is another mechanical machining process used to shape or resize the cross-section of a metal. Similar to forming, the deformation is achieved using cold rolling mills with rollers that rotate in opposite directions.
Comparing metal rolling and drawing
Let’s compare the differences between a cold drawn or a cold rolled metal: for example, the metal wire processing obtained by casting, which can be performed by means of:
Metal drawing, in a traction process to stretch and pull the wire;
Metal rolling, in a compression process, to deform the wire.
Metal rolled and drawn products have similar characteristics in terms of dimensional tolerances and surface finishes
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