TABLE OF CONTENTS Wire drawing is a form of drawing using a sliding action (Figure 10.1) where a wire of a larger size ( d 0) is pulled through a drawing ring of a smaller size ( d 1). In this process the wire is given the shape and the cross-sectional dimensions of the drawing ring. Wire drawing belongs to the production processes which involve forming by tensile and compressive forces, as a state of stress develops in the deformation zone due to deformation by both tension and pressure. In wire drawing, a difference is made according to the dimensions of the wire between:
| coarse drawing: | d = 16 to 4.2 mm |
| medium drawing: | d = 4.2 to 1.6 mm |
| fine drawing: | d = 1.6 to 0.7 mm |
| ultra-fine drawing: | d < 0.7 mm |
and according to the machine used, between:
single-draft drawing
tandem drawing.
Wire and rod drawing are used to produce wires and rods with smooth surfaces and low tolerances for various fields of application (Table 10.1).
| Material | Application |
|---|---|
| Low-carbon steels, C 10 C22 | Wires, wire meshes, barbed wire, pins, nails, screws and bolts, rivets |
| High-carbon steels (up to 1.6% C) | Rod material for automatic processing, wire cables |
| Alloy steels | Industrial springs, welding wires |
| Copper... |
