What is metal forming?
Metal forming is one of the most widely used manufacturing processes in the world. During the Forming process, the metal is plastically deformed by a force that exceeds the material yield strength where strain hardening occurs.
To be able to successfully form, the material should have a low yield strength and high ductility, while strain rate and lubrication affects the performance too. Increasing the temperature reduces yield strength and increases ductility to make it easier to deform hence some types of forming are performed hot.
Forming processes tend to be categorised by different types of force and can be grouped into the following categories;
- Compressive stress forming
- Tensile stress forming
- Combine stress
Further the these can be sub divided into the various forms on forming depending on how the force is applied.
Rolling, where the flat metal is deformed using compression force by passing through two rotating rollers.
Forging, deforms the metal between two dies, where the die shapes are imparted onto the raw metal piece. This can be either hot or cold working process
Extrusion, where material is compressive deformation by forcing the work through a die orifice, where the work takes on the shape of the die opening
Drawing – Reduction of the diameter of a round wire or bar by pulling it through a die opening
Sheet metal working, cold deformation of the sheet metal via a punch and die assembly. Sometimes alternatively referred to as pressworking due to the press machines used