47. ROLLING AND BENDING

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The basic process is,

1. We start with raw material in some form, typically there is one long dimension. The material may be hot or cold.

2. The material is then fed in between rollers.

3. The rollers apply a force to the material to thin or reshape the original cross section.

4. The material emerges from the other side of the rollers in a new shape.

5. The material may then be taken off, passed through another set of rollers, coated with oils, drawn, etc.

There are two types of rolling,

flat rolling - reduces the thickness of a sheet of material.

shape rolling - produces new parts with a complex cross section.

Materials that have been rolled typically have a wrought structure with the grains broken down.

Rollers play a large part in continuous casting after the molten metal is poured off into a bloom, or some equivalent form.