Induction bending and hot rolling are two metalworking process that use heat to form and shape metal. Although they have some similarities there are many differences between the two processes.
Induction Bending
Induction bending is an efficient way to form a bend in a metal pipe or tube when only a specific area of a metal tube or pipe requires a bend. That specific area is usually heated with the use of an induction coil in order to make the material easier to bend to a preset radius. Almost any metal or steel product can be used in the induction bending process, this includes metal bars, pipes and tubes.
Some advantages of induction bending are as follows::
1. Decreases the amount of distortion - with induction bending you have the ability to heat a specific area of the metal pipe and this will ensure that a minimal amount of distortion occurs after the bend is completed.
2. More energy efficient - induction bending results in higher energy efficient systems since only a portion of the metal requires heating the power required to create the bend is kept to a minimum.
3. Lowers overhead costs - the induction bending process does not require any sand filling or internal mandrels, so the overhead costs are much lower.
4. Cost effective - bending times do not take as long as other processes, making induction bending more cost effective.
5. Better quality - the overall quality of the product is better than that of cold bending, where excessive warping and wall thinning may occur.
6) Smoother finish - induction bending eliminates the need for mechanical or welded joints, resulting in a smoother finish.
Hot Rolling
In the hot rolling process an entire metal slab is heated to between 800 and 2,200 degrees Fahrenheit and while the metal is still hot it is sent through rollers that are set to a controlled amount of weight that will change the metal to the desired size or thickness. The metal is then quenched with either air or water spray. In the hot rolling process steel is usually the metal that is used. Most non-ferrous metals, these are metals other than iron or alloys that do not contain a certain amount of iron, are typically cold rolled.
So induction bending is usually used to bend a specific area of a finished piece of metal, where hot rolling, much in the same way as cold rolling, is a process used to change the thickness of a metal. Although there may be some crossovers in the way the finished metal products are used, induction bending is almost always used on large pipes such as petroleum pipelines, but can also be used in making smaller products such as springs, and farming tools. In the hot rolling process finished steel is typically used for sheet metal and comes coiled. These coils of sheet metal are either used directly by fabricators or as feed for cold rolling mills where they are later turned into sheet metal, metal foil and metal plates.
Author Resource:-
Corey Rozon is a freelance writer from Ottawa.
This article about induction bending metal and hot rolling was written for Paramount Roll, a company specializing in process to bend steel.
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