Principle of Drawing

PRINCIPLE OF DRAWING

The process which is used to reduce the cross section of metal is called drawing. It is normally a cold working process in which the material to be drawn is pulled through a tapered hole in a die as shown in Figure 3.59. However, it may be performed at elevated temperature to hot work large wires, rods or hollow sections in order to reduce forces. This drawing process requires very high force to pull the metal through the die. Drawing process primarily uses tensile forces to stretch the metal but compression also plays a significant role since the metal is squeezed as it passes through die opening.

Applications of drawing:

1. It is very much useful to produce round, rectangular, square and hexagonal shapes.

2. Electrical wire and wire frame structures are made with this process.

3. It is useful to make the hydraulic systems of vehicles and industrial machineries.