What is Metal Rolling?
In the context of Metalworking, metal rolling involves passing metal stock through one or more pairs of rolls to reduce the thickness, make the thickness uniform, and/or impart a desired mechanical property.
The process of rolling can be carried out either hot or cold. Hot rolling is done at temperatures above the recrystallisation temperature of the material, and cold rolling is conducted below the recrystallization temperature.
The quality of a finished product depends upon several factors, including the type and condition of the rolls used in the process, as well as the temperature and speed of the rolling process. The surface finish of a rolled product can vary from smooth to heavily textured, depending on the desired result.
Metal rolling is used to produce flat sheet stock, as well as structural shapes like I-beams, rails, channels, angles and rods. It is a process that can be employed for many different types of materials, including steel, aluminium alloys, copper alloys, stainless steel and even some plastics. And, it is an important part of the manufacturing process for many industries where precision parts or components are required.
What is the difference between metal rolling and metal bending?
Metal rolling and metal bending are both processes used in manufacturing to deform metal into specific shapes, but they are different in their methodologies and typical use cases.
Metal rolling is a process that reduces the thickness of the metal and makes it uniform throughout. This is achieved by passing the metal between two rolls that rotate in opposite directions. The pressure exerted by these rolls reduces the thickness of the metal and increases its length. Rolling is often used when you want to produce large quantities of metal with uniform thickness, like sheets or strips. There are different types of metal rolling such as hot rolling, cold rolling, tandem rolling, ring rolling, etc.
Metal bending, on the other hand, is a process where metal is deformed around a certain axis. This is achieved by applying force (through manual or machine methods) to a section of metal causing it to bend at an angle and form a ‘V’, ‘U’, or other shapes. Bending does not alter the thickness of the metal, but it changes its form to meet specific requirements. Bending is commonly used in forming parts like brackets, flanges, frames, etc. There are various types of bending processes including press bending, roll bending, tube bending, etc.
In essence, while both processes manipulate the shape of the metal, metal rolling focuses more on altering the thickness and creating uniform sheets or strips, whereas metal bending is about creating angled bends to form specific shapes.